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WO2025244488A1 - Unité d'affichage et dispositif électronique la comprenant - Google Patents

Unité d'affichage et dispositif électronique la comprenant

Info

Publication number
WO2025244488A1
WO2025244488A1 PCT/KR2025/095227 KR2025095227W WO2025244488A1 WO 2025244488 A1 WO2025244488 A1 WO 2025244488A1 KR 2025095227 W KR2025095227 W KR 2025095227W WO 2025244488 A1 WO2025244488 A1 WO 2025244488A1
Authority
WO
WIPO (PCT)
Prior art keywords
state
transistor
signal
time period
changing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/KR2025/095227
Other languages
English (en)
Korean (ko)
Inventor
이준규
조동현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020240076437A external-priority patent/KR20250166689A/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of WO2025244488A1 publication Critical patent/WO2025244488A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes

Definitions

  • a display may be used to display an image.
  • the display may include a display panel and a display driving circuit.
  • the display driving circuit may be configured to display the image acquired from a processor of the electronic device on the display panel.
  • the display driving circuit may be configured to control a source driver (or data driver) of the electronic device and a gate driver (or scan driver) of the electronic device to display the image on the display panel.
  • the display may include display driver integrated circuitry.
  • the display may include a display panel including pixels.
  • the display may include a first gate driver circuit.
  • the display may include a second gate driver circuit.
  • Each of the pixels may include sub-pixels.
  • Each of the sub-pixels may include a light-emitting element.
  • Each of the sub-pixels may include a storage capacitor configured to store a data voltage.
  • Each of the sub-pixels may include a first transistor including a gate electrode electrically connected to the storage capacitor, a source electrode, and a drain electrode electrically connectable to an anode electrode of the light-emitting element, and configured to obtain a current to be provided to the light-emitting element according to the data voltage stored in the storage capacitor.
  • Each of the sub-pixels may include a second transistor including a drain electrode electrically connected to the source electrode of the first transistor.
  • Each of the sub-pixels may include a third transistor having a source electrode electrically connected to the anode electrode of the light-emitting element.
  • the display driving circuit may be configured to adjust a threshold voltage of the first transistor by providing a bias voltage to the source electrode of the first transistor based on controlling the first gate driver circuit to change a state of a first signal transmitted to the gate electrode of the second transistor.
  • the display driving circuit may be configured to initialize the anode electrode of the light-emitting element by providing an initialization voltage to the anode electrode of the light-emitting element based on controlling the second gate driver circuit to change a state of a second signal transmitted to the gate electrode of the third transistor.
  • the sub-pixels may include a first sub-pixel configured to emit light with a first color and a second sub-pixel configured to emit light with a second color.
  • a first bias voltage provided to the source electrode of the first transistor in the first sub-pixel according to the change in the state of the first signal may be different from a second bias voltage provided to the source electrode of the first transistor in the second sub-pixel according to the change in the state of the first signal.
  • the display may be incorporated into an electronic device.
  • the electronic device may be described as a portable device, a multi-function device, or a mobile device.
  • the electronic device may include at least one processor (e.g., including a processing circuit) and a memory that stores instructions and includes one or more storage media.
  • the instructions when individually or collectively executed by the at least one processor, may cause the electronic device to generate an image to be displayed on the display panel and provide the generated image to the display driving circuit.
  • Figure 1 is a chart showing the current in a light-emitting element that changes according to a change in the refresh rate.
  • Figure 2 is a schematic view of an electronic device including a display.
  • Figure 3 illustrates an example of a subpixel within a display panel.
  • Figures 4 to 6 illustrate examples of controlling a second transistor and a third transistor electrically connected to a first transistor.
  • FIG. 7 is a chart showing how brightness changes depending on controlling a third transistor electrically connected to the first transistor independently of controlling a second transistor electrically connected to the first transistor.
  • FIG. 8 is a block diagram of an electronic device within a network environment according to various embodiments.
  • FIG. 9 is a block diagram of a display module according to various embodiments.
  • An electronic device may display an image based on a refresh rate.
  • the refresh rate may be adaptively changed.
  • the electronic device may lower the refresh rate to reduce power consumption by displaying an image on a display panel of the electronic device.
  • the electronic device may change the refresh rate from a first refresh rate to a second refresh rate lower than the first refresh rate.
  • providing the second refresh rate may reduce power consumption, but providing the second refresh rate may cause afterimages (e.g., image sticking, afterimage, or image persistence) on the display panel.
  • the electronic device may increase the refresh rate to enhance the quality of the image displayed on the display panel.
  • the electronic device may change the refresh rate from the second refresh rate to the first refresh rate.
  • a change from the first refresh rate to the second refresh rate or a change from the second refresh rate to the first refresh rate may provide an indication on the display panel that is appropriate for the situation, but a change from the first refresh rate to the second refresh rate or a change from the second refresh rate to the first refresh rate may cause flickering.
  • the flickering may occur on the display panel under a condition that a difference between the first refresh rate and the second refresh rate is greater than or equal to a certain value.
  • the display panel may include pixels. Each of the pixels may include sub-pixels. Each of the sub-pixels may include a light-emitting element (e.g., an organic light emitting diode (OLED)). Each of the sub-pixels may include a driving transistor (e.g., a first transistor described below) configured to obtain a current provided to the light-emitting element to emit light from the light-emitting element.
  • a driving transistor e.g., a first transistor described below
  • the flicker may be caused by a relationship between a voltage (e.g., a gate-source voltage of the driving transistor) and a current (e.g., a current provided to the light-emitting element (or a current from a drain electrode of the driving transistor to a source electrode of the driving transistor)) that change according to a change from the first refresh rate to the second refresh rate or a change from the second refresh rate to the first refresh rate.
  • a voltage e.g., a gate-source voltage of the driving transistor
  • a current e.g., a current provided to the light-emitting element (or a current from a drain electrode of the driving transistor to a source electrode of the driving transistor)
  • the flicker is described and exemplified in more detail with reference to FIG. 1.
  • Figure 1 is a chart showing the current in a light-emitting element that changes according to a change in the refresh rate.
  • the relationship between the gate-source voltage of the driving transistor and the current (or current from the drain electrode of the driving transistor to the source electrode of the driving transistor) provided (or applied) to the light-emitting element (e.g., OLED) may change according to a change from the first refresh rate to the second refresh rate or a change from the second refresh rate to the first refresh rate.
  • the relationship changing according to a change from the first refresh rate to the second refresh rate or a change from the second refresh rate to the first refresh rate may cause the flickering.
  • the chart (100) represents a change in the relationship according to a change in the refresh rate (e.g., a change from the first refresh rate to the second refresh rate or a change from the second refresh rate to the first refresh rate).
  • the horizontal axis of the chart (100) represents the gate-source voltage (Vgs) of the driving transistor, and the vertical axis of the chart (100) represents the current (or the current from the drain electrode of the driving transistor to the source electrode of the driving transistor) (Ids) provided to the light-emitting element (e.g., OLED).
  • a line (110) (or curve (110)) in the chart (100) represents a relationship between a gate-source voltage (Vgs) and a current (Ids) when an image is displayed on the display panel at the first refresh rate
  • a line (120) (or curve (120)) in the chart (100) represents a relationship between a gate-source voltage (Vgs) and a current (Ids) when an image is displayed on the display panel at the second refresh rate.
  • the line (120) may be offset with respect to the line (110).
  • the value (111) of the current (Ids) in the line (110) when the gate-source voltage (Vgs) is at the value (130) may be different from the value (121) of the current (Ids) in the line (120) when the gate-source voltage (Vgs) is at the value (130).
  • the difference (140) between the values (111) and (121) is greater than a certain level, a change from the first refresh rate to the second refresh rate and/or a change from the second refresh rate to the first refresh rate may cause the flickering.
  • adjusting the threshold voltage of the driving transistor by providing (or applying) a bias voltage to the source electrode of the driving transistor may be performed (or executed) to reduce the flicker.
  • adjusting the threshold voltage of the driving transistor may reduce the flicker (e.g., the occurrence of the flicker and/or the degree of the flicker).
  • adjusting the threshold voltage of the driving transistor may be performed in conjunction with initializing the anode electrode of the light-emitting element by providing an initialization voltage to the anode electrode of the light-emitting element.
  • changing the state of a signal transmitted to a gate electrode of a threshold voltage adjustment transistor e.g., a second transistor exemplified below
  • changing the state of a signal transmitted to a gate electrode of a bypass transistor e.g., a third transistor exemplified below
  • changing the state of a signal transmitted to a gate electrode of a bypass transistor e.g., a third transistor exemplified below
  • electrically connected to the anode electrode of the light-emitting element to initialize the anode electrode of the light-emitting element may be performed via one (a) gate driver circuit (or the same gate driver circuit) (or a single gate driver circuit).
  • the gate driver circuit used to adjust the threshold voltage of the driving transistor may be the same as the gate driver circuit used to initialize the anode electrode of the light-emitting element, for example, to perform adjusting the threshold voltage of the driving transistor in conjunction with initializing the anode electrode of the light-emitting element.
  • adjusting the threshold voltage of the driving transistor in conjunction with initializing the anode electrode of the light emitting element may reduce flickering
  • adjusting the threshold voltage of the driving transistor in conjunction with initializing the anode electrode of the light emitting element may increase the time until the luminance of light from the light emitting element reaches a target luminance.
  • the increase in time caused by adjusting the threshold voltage of the driving transistor in conjunction with initializing the anode electrode of the light emitting element may reduce the quality of an image displayed at a relatively low luminance on the display panel.
  • adjusting the threshold voltage of the driving transistor in conjunction with initializing the anode electrode of the light emitting element may cause cloudy spots, lines, and/or areas in an image displayed at a relatively low luminance on the display.
  • performing adjustment of the threshold voltage of the driving transistor in conjunction with initializing the anode electrode of the light emitting element may cause jelly scrolling within an image displayed at relatively low brightness on the display.
  • the display described below may be configured to perform initializing the anode electrode of the light-emitting element independently from adjusting the threshold voltage of the driving transistor.
  • performing initializing the anode electrode of the light-emitting element independently from adjusting the threshold voltage of the driving transistor may include initializing the anode electrode of the light-emitting element via a second gate driver circuit that is different from a first gate driver circuit (or scan driver circuit) used to adjust the threshold voltage of the driving transistor.
  • performing initializing the anode electrode of the light-emitting element independently from adjusting the threshold voltage of the driving transistor may include controlling the second gate driver circuit to change a state of a signal transmitted to a gate electrode of the bypass transistor independently from controlling the first gate driver circuit to change a state of a signal transmitted to a gate electrode of the threshold voltage adjusting transistor.
  • performing initializing the anode electrode of the light-emitting element independently from adjusting the threshold voltage of the driving transistor may include initializing the anode electrode of the light-emitting element less frequently (or less frequently) than the frequency of adjusting the threshold voltage of the driving transistor.
  • performing initializing the anode electrode of the light-emitting element independently from adjusting the threshold voltage of the driving transistor may include initializing the anode electrode of the light-emitting element less frequently than the frequency of adjusting the threshold voltage of the driving transistor.
  • Figure 2 is a schematic view of an electronic device including a display.
  • the display (215) may include at least a portion of the display module (860) of FIG. 8 or correspond to at least a portion of the display module (860) of FIG. 8.
  • the display (215) may be described as a display device.
  • the display (215) may be included in the electronic device (200).
  • the electronic device (200) may include at least a portion of the electronic device (801) of FIG. 8 or correspond to at least a portion of the electronic device (801) of FIG. 8.
  • the electronic device (200) may include at least one processor (210) (e.g., including a processing circuit) (e.g., including a central processing unit (CPU), a graphic processing unit (GPU), and a display processing unit (DPU)).
  • the electronic device (200) may include a memory that includes one or more storage media and stores instructions.
  • the memory may include at least a portion of the memory (830) of FIG. 8 or may correspond to at least a portion of the memory (830) of FIG. 8.
  • the instructions when individually or collectively executed by at least one processor (210), may cause the electronic device (200) to generate or obtain an image to be displayed via the display (215).
  • the instructions, when individually or collectively executed by at least one processor (210) may provide data for the image to the display (215) (or the display driving circuit (220)) to display the image via the display (215).
  • the display (215) may include a display driving circuit (220) and a display panel (240).
  • the display driver circuit (220) may be used to display an image (e.g., an image provided from at least one processor (210)) on a display panel (240).
  • the display driver circuit (220) may include at least a portion of the display driver IC (DDI) (930) of FIG. 9 or may correspond to at least a portion of the DDI (930) of FIG. 9.
  • the display driving circuit (220) may perform (or execute) a first scan to display the image on the display panel (240).
  • the first scan may be described as an address scan.
  • the first scan may include initiating a gate terminal of the driving transistor, providing a data voltage to the initialized gate terminal of the driving transistor, and providing current to the light emitting element through the driving transistor having the provided data voltage at the gate terminal.
  • the first scan may further include initializing the gate terminal of the driving transistor by providing an initialization voltage to the gate terminal of the driving transistor, and providing a data voltage to the initialized gate terminal of the driving transistor, compared to the second scan exemplified below.
  • the display driving circuit (220) may perform (or execute) a second scan to maintain the image on the display panel (240).
  • the second scan may be described as a self scan.
  • the second scan may include providing current to the light-emitting element through the driving transistor while the data voltage provided to the gate terminal of the driving transistor according to the first scan is maintained.
  • the second scan may include skipping initializing the gate terminal of the driving transistor to maintain the data voltage provided to the gate terminal of the driving transistor according to the first scan.
  • the second scan unlike the first scan, may not include initializing the gate terminal of the driving transistor and providing a data voltage to the initialized gate terminal of the driving transistor.
  • the display panel (240) may include at least a portion of the display (910) of FIG. 9 or may correspond to at least a portion of the display (910) of FIG. 9.
  • the display panel (240) may include pixels. Each of the pixels may include sub-pixels.
  • the sub-pixels may include a first sub-pixel configured to emit light with a first color (e.g., red), a second sub-pixel configured to emit light with a second color (e.g., green), and a third sub-pixel configured to emit light with a third color (e.g., blue).
  • the sub-pixels may further include a fourth sub-pixel configured to emit light with a fourth color (e.g., white).
  • each of the sub-pixels may include a light-emitting element (e.g., an OLED) and a driving transistor (or a driving transistor for driving the light-emitting element) for providing current to the light-emitting element (or for obtaining current to be provided to the light-emitting element) (or for generating current to be provided to the light-emitting element) (or for applying current to be provided to the light-emitting element).
  • each of the sub-pixels may include an operation control transistor including a drain electrode electrically connected to a source electrode of the driving transistor and a source electrode electrically connected to a driving voltage line for transmitting a driving voltage (VDD).
  • VDD driving voltage
  • each of the sub-pixels may include an emission control transistor including a source electrode electrically connected to a drain electrode of the driving transistor and a drain electrode electrically connected to an anode electrode of the light-emitting element.
  • the display driving circuit (220) may provide an emission signal to each of the gate electrode of the operation control transistor and the gate electrode of the emission control transistor.
  • the current obtained through the driving transistor can be provided to the light-emitting element.
  • the light-emitting element can emit light according to the current.
  • each of the sub-pixels may further include, in addition to the driving transistor, the operation control transistor, and the light emitting control transistor exemplified above, one or more other transistors and one or more capacitors.
  • An example configuration of each of the sub-pixels is described and illustrated with reference to FIG. 3.
  • Figure 3 illustrates an example of a subpixel within a display panel.
  • each of the sub-pixels may include a light-emitting element (e.g., a light-emitting diode (300) or OLED (300)), a first transistor (301) (e.g., the driving transistor), a second transistor (302) (e.g., the threshold voltage adjustment transistor), a third transistor (303) (e.g., the bypass transistor), a fourth transistor (304) (e.g., the initialization transistor), a fifth transistor (305) (e.g., the operation control transistor), a sixth transistor (306) (e.g., the light-emitting control transistor), a seventh transistor (307) (e.g., a switching transistor), an eighth transistor (308) (e.g., a compensation transistor), and a capacitor (309) (e.g., a storage capacitor).
  • a light-emitting element e.g., a light-emitting diode (300) or OLED (300)
  • a first transistor (301) e.g., the driving transistor
  • the gate electrode (G) of the first transistor (301) may be electrically connected to the drain electrode (D) of the eighth transistor (308).
  • the gate electrode (G) of the first transistor (301) may also be electrically connected to the drain electrode (D) of the fourth transistor (304).
  • the gate electrode (G) of the first transistor (301) may also be electrically connected to a capacitor (309) used to store a data voltage (Vdata).
  • the gate electrode (G) of the first transistor (301) may also be electrically connected to a capacitor (310) (optional) used to compensate for a voltage drop caused by a change in the state of the fifth signal (315) transmitted to the gate electrode (G) of the first transistor (301) (e.g., a change from a second state (e.g., a low state) to a first state (e.g., a high state)).
  • a capacitor (310) used to compensate for a voltage drop caused by a change in the state of the fifth signal (315) transmitted to the gate electrode (G) of the first transistor (301) (e.g., a change from a second state (e.g., a low state) to a first state (e.g., a high state)).
  • the source electrode (S) of the first transistor (301) may be electrically connected to the drain electrode (D) of the seventh transistor (307).
  • the source electrode (S) of the first transistor (301) may also be electrically connected to the drain electrode (D) of the fifth transistor (305).
  • the source electrode (S) of the first transistor (301) may also be electrically connected to the drain electrode (D) of the second transistor (302).
  • the drain electrode (D) of the first transistor (301) can be electrically connected to the source electrode (S) of the eighth transistor (308).
  • the drain electrode (D) of the first transistor (301) can also be electrically connected to the source electrode (S) of the sixth transistor (306).
  • the first transistor (301) can be used to provide current (320) to the OLED (300).
  • the gate electrode (G) of the seventh transistor (307) may be configured to receive the fifth signal (315).
  • the source electrode (S) of the seventh transistor (307) may be configured to obtain the data voltage (Vdata).
  • the gate electrode (G) of the eighth transistor (308) can be configured to receive a second signal (312).
  • the gate electrode (G) of the fourth transistor (304) may be configured to receive a first signal (311).
  • the source electrode (S) of the fourth transistor (304) may be configured to obtain a first initialization voltage (Vint1) (e.g., about -3.5 (V)).
  • the gate electrode (G) of the fifth transistor (305) may be configured to receive a light emission signal (316).
  • the source electrode of the fifth transistor (305) may be configured to obtain a first driving voltage (VDD).
  • the gate electrode (G) of the sixth transistor (306) may be configured to receive a light emission signal (316).
  • the drain electrode (D) of the sixth transistor (306) may be electrically connected to the source electrode (S) of the third transistor (303).
  • the drain electrode (D) of the sixth transistor (306) may also be electrically connected to the anode electrode of the OLED (300).
  • the gate electrode (G) of the third transistor (303) may be configured to receive a fourth signal (314).
  • the drain electrode (D) of the third transistor (303) may be configured to obtain a second initialization voltage (e.g., about -3 (V)).
  • the gate electrode (G) of the second transistor (302) may be configured to receive a third signal (313).
  • the source electrode (S) of the second transistor (302) may be configured to obtain a bias voltage (Vbias).
  • the bias voltage (Vbias) may vary depending on the color of light emitted by the sub-pixel. For example, a first bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel among the sub-pixels may be different from a second bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel among the sub-pixels.
  • a third bias voltage provided to a source electrode (S) of a first transistor (301) in a third sub-pixel among the sub-pixels may be different from a first bias voltage provided to a source electrode (S) of a first transistor (301) in a first sub-pixel among the sub-pixels and/or a second bias voltage provided to a source electrode (S) of a first transistor (301) in a second sub-pixel among the sub-pixels.
  • the third bias voltage may be higher than the first bias voltage and the second bias voltage.
  • the first bias voltage may be higher than the second bias voltage.
  • the difference between the first bias voltage and the second bias voltage may be about 0.01 (V) or less.
  • the difference between the first bias voltage and the third bias voltage may be about 0.01 (V) or less.
  • the fourth bias voltage provided to the source electrode (S) of the first transistor (301) in the fourth sub-pixel among the sub-pixels may be different from the first bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel among the sub-pixels, the second bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel among the sub-pixels, and/or the third bias voltage provided to the source electrode (S) of the first transistor (301) in the third sub-pixel.
  • the cathode electrode of the OLED (300) can be configured to obtain a second driving voltage (VSS).
  • the display driving circuit (220) can display an image on the display panel (240) based on performing the first scan by providing the first signal (311), the second signal (312), the third signal (313), the fourth signal (314), the fifth signal (315), and the emission signal (316) to each of the sub-pixels.
  • the display driving circuit (220) can maintain an image on the display panel (240) based on performing the second scan by providing the third signal (313) and the emission signal (316) to each of the sub-pixels.
  • the display driving circuit (220) can change the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) independently from changing the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) for the quality of an image displayed (and/or maintained) at a relatively low brightness on the display panel (240).
  • changing the state of the third signal (313) may be performed by controlling the first gate driver circuit
  • changing the state of the fourth signal (314) may be performed by controlling the second gate driver circuit, which is different from the first gate driver circuit.
  • the first gate driver circuit and the second gate driver circuit may be included in the display driving circuit (220).
  • the first gate driver circuit and the second gate driver circuit may be included in the display panel (240).
  • each of the sub-pixels may include a first electrical path (not shown) electrically connected to the gate electrode (G) of the second transistor (302) for a third signal (313) and a second electrical path (not shown) electrically connected to the gate electrode (G) of the third transistor (303) for a fourth signal (314).
  • the second electrical path may be electrically separated or isolated from the first electrical path so as to change the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) independently of changing the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302).
  • the display driver circuit (220) can adjust (or change) (or calibrate) the threshold voltage of the first transistor (301) by providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) based on controlling the first gate driver circuit to change the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302).
  • the display driver circuit (220) can adjust the threshold voltage of the first transistor (301) to reduce flickering caused by a change from the first refresh rate to the second refresh rate or a change from the second refresh rate to the first refresh rate.
  • the display driving circuit (220) can initialize the anode electrode of the OLED (300) by providing a second initialization voltage (Vint2) to the anode electrode of the OLED (300) based on controlling the second gate driver circuit to change the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303).
  • Vint2 second initialization voltage
  • the display driving circuit (220) can initialize the anode electrode of the OLED (300) by providing a second initialization voltage (Vint2) to the anode electrode of the OLED (300) based on controlling the second gate driver circuit to change the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303).
  • Vint2 second initialization voltage
  • adjusting the threshold voltage of the first transistor (301) can be performed more frequently than initializing the anode electrode of the OLED (300).
  • adjusting the threshold voltage of the first transistor (301) may be performed more frequently than initializing the anode electrode of the OLED (300) to reduce the time until the luminance of light from the OLED (300) reaches a target luminance and to reduce flickering caused by a change from the first refresh rate to the second refresh rate or a change from the second refresh rate to the first refresh rate.
  • the number of times the threshold voltage of the first transistor (301) is adjusted within a time period of the vertical synchronization signal may be greater than the number of times the anode electrode of the OLED (300) is initialized within the time period of the vertical synchronization signal.
  • the number of times the threshold voltage of the first transistor (301) is adjusted while performing the first scan may be greater than the number of times the anode electrode of the OLED (300) is initialized while performing the first scan.
  • the number of times the threshold voltage of the first transistor (301) is adjusted while performing the second scan may be greater than the number of times the anode electrode of the OLED (300) is initialized while performing the second scan.
  • the third transistor (303) may be configured with an NMOS (n-channel metal oxide semiconductor), unlike the second transistor (302) which is configured with a PMOS (P-channel metal oxide semiconductor).
  • the third transistor (303) may include an NMOS to reduce leakage current at the anode electrode of the OLED (300) caused while the data voltage (Vdata) is maintained at the gate electrode (G) of the first transistor (301).
  • the bias voltage (Vbias) may be provided to the source electrode (S) of the first transistor (301) while transmitting the third signal (313) within the second state to the gate electrode (G) of the second transistor (302)
  • the second initialization voltage (Vint2) may be provided to the anode electrode of the OLED (300) while transmitting the fourth signal (314) within the first state to the gate electrode (G) of the third transistor (303).
  • a first time duration for providing a bias voltage to the source electrode (S) of the first transistor (301) to adjust the threshold voltage of the first transistor (301) may be different from a second time duration for providing a second initialization voltage (Vint2) to the anode electrode of the OLED (300) to initialize the anode electrode of the OLED (300).
  • the length of the first time duration may be longer than the length of the second time duration.
  • the present invention is not limited thereto.
  • the length of the first time duration may be the same as the length of the second time duration.
  • the first time period may at least partially overlap with the second time period or may not overlap with the second time period.
  • Figures 4 to 6 illustrate examples of controlling a second transistor and a third transistor electrically connected to a first transistor.
  • the display driving circuit (220) can perform the first scan within the time period (400) before the light emitting signal (316) is transmitted to each of the gate electrode (G) of the fifth transistor (305) and the gate electrode (G) of the sixth transistor (306) within the time period (490).
  • the display driving circuit (220) can change the state of the first signal (311) transmitted to the gate electrode (G) of the fourth transistor (304) from the second state (e.g., low state) to the first state (e.g., high state) at time (401) (or timing (401)).
  • the display driving circuit (220) can initialize the gate electrode (G) of the first transistor (301) based on providing the first initialization voltage (Vint1) to the gate electrode (G) of the first transistor (301) by maintaining the state of the first signal (311) in the first state for a time period (402) from time (401).
  • the display driving circuit (220) can change the state of the first signal (311) from the first state to the second state at time (403) (or timing (403)).
  • providing the first initialization voltage (Vint1) to the gate electrode (G) of the first transistor (301) may be interrupted by changing the state of the first signal (311) from the first state to the second state.
  • the display driving circuit (220) can change the state of the second signal (312) transmitted to the gate electrode (G) of the eighth transistor (308) from the second state to the first state at a time (407) (or timing (407)) after the time (403).
  • the display driving circuit (220) can electrically connect the gate electrode (G) of the first transistor (301) to the drain electrode (D) of the first transistor (301) via the eighth transistor (308) during the time period (408) by maintaining the state of the second signal (312) in the first state during a time period (408) from the time (407).
  • the display driving circuit (220) can change the state of the second signal (312) from the first state to the second state at a time period (409). Electrically connecting the gate electrode (G) of the first transistor (301) to the drain electrode (D) of the first transistor (301) through the eighth transistor (308) can be interrupted by changing the state of the second signal (312) from the first state to the second state.
  • the display driving circuit (220) can change the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state at time (407).
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (408) by maintaining the state of the third signal (313) in the second state for a time period (408) from time (407).
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (408) in which the state of the second signal (312) is maintained in the second state.
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) for a time period (408) so that current from the source electrode (S) of the first transistor (301) to the drain electrode (D) of the first transistor (301) flows to the capacitor (309) through the eighth transistor (308).
  • the display driving circuit (220) can adjust the threshold voltage of the first transistor (301) by providing the bias voltage (Vbias) to the source electrode (S) of the first transistor (301) for a time period (408).
  • a bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel may be different from a bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the bias voltage provided to the source electrode (S) of the first transistor (301) in the third sub-pixel to adjust the threshold voltage of the first transistor (301) in the third sub-pixel may be different from the bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel and/or the bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the display driver circuit (220) may change the state of the third signal (313) from the second state to the first state at time (409).
  • Providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) can be stopped by changing the state of the third signal (313) from the second state to the first state.
  • the display driving circuit (220) can change the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) from the second state to the first state at time (407).
  • the time for changing the state of the third signal (313) from the first state to the second state and the time for changing the state of the fourth signal (314) from the second state to the first state are the same as time (407), but changing the state of the fourth signal (314) from the second state to the first state can be performed independently from changing the state of the third signal (313) from the first state to the second state.
  • the display driving circuit (220) can provide the second initialization voltage (Vint2) to the anode electrode of the OLED (300) during the time period (408) by maintaining the state of the fourth signal (314) in the first state during the time period (408) from the time (407).
  • the display driving circuit (220) can initialize the anode electrode of the OLED (300) by providing the second initialization voltage (Vint2) to the anode electrode of the OLED (300) during the time period (408).
  • maintaining the state of the fourth signal (314) in the first state can be performed independently of maintaining the state of the third signal (313) in the second state.
  • the display driving circuit (220) can change the state of the fourth signal (314) from the first state to the second state at time (409).
  • Providing the second initialization voltage (Vint2) to the anode electrode of the OLED (300) can be stopped by changing the state of the fourth signal (314) from the first state to the second state.
  • the display driving circuit (220) can change the state of the first signal (311) transmitted to the gate electrode (G) of the fourth transistor (304) from the second state to the first state at time (404) (or timing (404)).
  • the display driving circuit (220) can initialize the gate electrode (G) of the first transistor (301) having a voltage according to the bias voltage (Vbias) (e.g., a voltage reduced by the threshold voltage from the bias voltage (Vbias)) based on providing the first initialization voltage (Vint1) to the gate electrode (G) of the first transistor (301) by maintaining the state of the first signal (311) in the first state for a time period (405) from time (404).
  • Vbias bias voltage
  • the time period (405) can be longer than the time period (402).
  • the time period (405) may be the same as the time period (402).
  • the time period (405) may be shorter than the time period (402).
  • the display driver circuit (220) may change the state of the first signal (311) from the first state to the second state at time (406) (or timing (406)).
  • providing the first initialization voltage (Vint1) to the gate electrode (G) of the first transistor (301) may be interrupted by changing the state of the first signal (311) from the first state to the second state.
  • the display driving circuit (220) can change the state of the second signal (312) transmitted to the gate electrode (G) of the eighth transistor (308) from the second state to the first state at a time (410) (or timing (410)) after the time (406).
  • the display driving circuit (220) can electrically connect the gate electrode (G) of the first transistor (301) to the drain electrode (D) of the first transistor (301) via the eighth transistor (308) during the time period (411) by maintaining the state of the second signal (312) in the first state for a time period (411) from the time (410).
  • the display driving circuit (220) can change the state of the second signal (312) from the first state to the second state at a time period (412). Electrically connecting the gate electrode (G) of the first transistor (301) to the drain electrode (D) of the first transistor (301) via the eighth transistor (308) can be interrupted by changing the state of the second signal (312) from the first state to the second state.
  • the display driving circuit (220) can change the state of the fifth signal (315) transmitted to the gate electrode (G) of the first transistor (301) from the first state to the second state at time (410).
  • the display driving circuit (220) can provide the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) initialized according to the first signal (311) in the first state transmitted during the time period (405) by maintaining the state of the fifth signal (315) in the second state during a time period (411) from time (410).
  • providing the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) can be performed (or executed) during the time period (411).
  • providing the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) may be performed during a time period (411) during which the state of the second signal (312) is maintained as the first state.
  • providing the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) may be performed while the gate electrode (G) of the first transistor (301) is electrically connected to the drain electrode (D) of the first transistor (301) according to the second signal (312) within the first state.
  • the display driving circuit (220) may change the state of the fifth signal (315) from the second state to the first state at time (412).
  • Providing the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) may be stopped according to changing the state of the fifth signal (315) from the second state to the first state.
  • the display driving circuit (220) can cause the OLED (300) to emit light for displaying an image acquired from at least one processor (210) by providing a current (e.g., current (320) of FIG. 3) according to a data voltage (Vdata) to the OLED (300).
  • the display driving circuit (220) can provide the current (320) to the OLED (300) by providing a light-emitting signal (316) to each of the gate electrode (G) of the fifth transistor (305) and the gate electrode (G) of the sixth transistor (306) within a time interval (490).
  • the display driving circuit (220) can perform the second scan within the time period (450) before the light emitting signal (316) is transmitted to each of the gate electrode (G) of the fifth transistor (305) and the gate electrode (G) of the sixth transistor (306) within the time period (491).
  • the second scan can be performed while the data voltage (Vdata) provided within the time period (411) is maintained.
  • the time period (450) for performing the second scan can be included within the time period of the vertical synchronization signal that includes the time period (400) for performing the first scan.
  • the time period (450) for performing the second scan can also be included within the time period of the vertical synchronization signal that follows the time period of the vertical synchronization signal that includes the time period (400) for performing the first scan.
  • the display driving circuit (220) can change the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state at time (451) (or timing (451)) for the second scan.
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (452) by maintaining the state of the third signal (313) in the second state during a time period (452) from time (451).
  • the display driving circuit (220) can adjust the threshold voltage of the first transistor (301) by providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (452).
  • a bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel may be different from a bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the bias voltage provided to the source electrode (S) of the first transistor (301) in the third sub-pixel to adjust the threshold voltage of the first transistor (301) in the third sub-pixel may be different from the bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel and/or the bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the display driving circuit (220) may change the state of the third signal (313) from the second state to the first state at time (453).
  • Providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) can be stopped by changing the state of the third signal (313) from the second state to the first state.
  • the display driving circuit (220) can provide the OLED (300) with a current (e.g., current (320) of FIG. 3) according to the data voltage (Vdata) to the OLED (300) to emit light in order to maintain an image acquired from at least one processor (210).
  • the display driving circuit (220) can provide the current (320) to the OLED (300) by providing a light emitting signal (316) to each of the gate electrode (G) of the fifth transistor (305) and the gate electrode (G) of the sixth transistor (306) within a time interval (491).
  • the time for changing the state of the fourth signal (314) from the second state to the first state within the time interval (400) may be different from the time for changing the state of the third signal (313) from the first state to the second state within the time interval (400).
  • the display driving circuit (220) may change the state of the third signal (313) from the first state to the second state at time (407) and maintain the state of the third signal (313) in the second state for a time period (408) from time (407).
  • the display driving circuit (220) can change the state of the fourth signal (314) from the second state to the first state at a time (410) after the time (407) at which the state of the third signal (313) is changed from the first state to the second state, as illustrated in FIG. 5, and maintain the state of the fourth signal (314) in the first state for a time period (411) from the time (410).
  • time period during which the state of the fourth signal (314) is maintained in the first state in FIG. 5 does not overlap with the time period during which the state of the third signal (313) is maintained in the second state.
  • the time period during which the state of the fourth signal (314) is maintained in the first state may at least partially overlap with the time period during which the state of the third signal (313) is maintained in the second state.
  • changing the state of the third signal (313) from the first state to the second state during the first scan performed within the time interval (400) may be performed two or more times
  • changing the state of the fourth signal (314) from the second state to the first state during the first scan performed within the time interval (400) may be performed two or more times.
  • some of the time periods during which the state of the third signal (313) is maintained in the second state during the first scan performed within the time interval (400) may overlap some of the time periods during which the state of the fourth signal (313) is maintained in the first state during the first scan performed within the time interval (400).
  • some other portion of the time periods during which the state of the third signal (313) is maintained in the second state during the first scan performed within the time interval (400) may not overlap with some other portion of the time periods during which the state of the fourth signal (313) is maintained in the first state during the first scan performed within the time interval (400).
  • the display driving circuit (220) can perform the first scan within the time period (400) before the light emitting signal (316) is transmitted to each of the gate electrode (G) of the fifth transistor (305) and the gate electrode (G) of the sixth transistor (306) within the time period (490).
  • the display driving circuit (220) can change the state of the first signal (311) transmitted to the gate electrode (G) of the fourth transistor (304) from the second state (e.g., low state) to the first state (e.g., high state) at time (601) (or timing (601)).
  • the display driving circuit (220) can initialize the gate electrode (G) of the first transistor (301) based on providing the first initialization voltage (Vint1) to the gate electrode (G) of the first transistor (301) by maintaining the state of the first signal (311) in the first state for a time period (602) from time (601).
  • the display driving circuit (220) can change the state of the first signal (311) from the first state to the second state at time (603) (or timing (603)).
  • providing the first initialization voltage (Vint1) to the gate electrode (G) of the first transistor (301) may be interrupted by changing the state of the first signal (311) from the first state to the second state.
  • the display driving circuit (220) can change the state of the second signal (312) transmitted to the gate electrode (G) of the eighth transistor (308) from the second state to the first state at a time (607) (or timing (607)) after the time (603).
  • the display driving circuit (220) can electrically connect the gate electrode (G) of the first transistor (301) to the drain electrode (D) of the first transistor (301) via the eighth transistor (308) during the time period (608) by maintaining the state of the second signal (312) in the first state during a time period (608) from the time (607).
  • the display driving circuit (220) can change the state of the second signal (312) from the first state to the second state at a time period (609). Electrically connecting the gate electrode (G) of the first transistor (301) to the drain electrode (D) of the first transistor (301) via the eighth transistor (308) can be interrupted by changing the state of the second signal (312) from the first state to the second state.
  • the display driving circuit (220) can change the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state at time (607).
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (608) by maintaining the state of the third signal (313) in the second state for a time period (608) from time (607).
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (608) in which the state of the second signal (312) is maintained in the second state.
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) for a time period (608) so that current from the source electrode (S) of the first transistor (301) to the drain electrode (D) of the first transistor (301) flows to the capacitor (309) through the eighth transistor (308).
  • the display driving circuit (220) can adjust the threshold voltage of the first transistor (301) by providing the bias voltage (Vbias) to the source electrode (S) of the first transistor (301) for a time period (608).
  • a bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel may be different from a bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the bias voltage provided to the source electrode (S) of the first transistor (301) in the third sub-pixel to adjust the threshold voltage of the first transistor (301) in the third sub-pixel may be different from the bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel and/or the bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the display driver circuit (220) may change the state of the third signal (313) from the second state to the first state at time (609).
  • Providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) can be stopped by changing the state of the third signal (313) from the second state to the first state.
  • the display driving circuit (220) can change the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) from the second state to the first state at time (607).
  • the time for changing the state of the third signal (313) from the first state to the second state and the time for changing the state of the fourth signal (314) from the second state to the first state are the same as time (607), but changing the state of the fourth signal (314) from the second state to the first state can be independent of changing the state of the third signal (313) from the first state to the second state.
  • the display driving circuit (220) can provide the second initialization voltage (Vint2) to the anode electrode of the OLED (300) during the time period (608) by maintaining the state of the fourth signal (314) in the first state during the time period (608) from the time (607).
  • the display driving circuit (220) can initialize the anode electrode of the OLED (300) by providing the second initialization voltage (Vint2) to the anode electrode of the OLED (300) during the time period (608).
  • maintaining the state of the fourth signal (314) in the first state can be independent of maintaining the state of the third signal (313) in the second state.
  • the display driving circuit (220) can change the state of the fourth signal (314) from the first state to the second state at time (609).
  • Providing the second initialization voltage (Vint2) to the anode electrode of the OLED (300) can be stopped by changing the state of the fourth signal (314) from the first state to the second state.
  • the display driving circuit (220) can change the state of the first signal (311) transmitted to the gate electrode (G) of the fourth transistor (304) from the second state to the first state at time (604) (or timing (604)).
  • the display driving circuit (220) can initialize the gate electrode (G) of the first transistor (301) having a voltage according to the bias voltage (Vbias) (e.g., a voltage reduced by the threshold voltage from the bias voltage (Vbias)) based on providing the first initialization voltage (Vint1) to the gate electrode (G) of the first transistor (301) by maintaining the state of the first signal (311) in the first state for a time period (605) from time (604).
  • Vbias bias voltage
  • the time period (605) can be longer than the time period (602).
  • the time period (605) may be the same as the time period (602).
  • the time period (605) may be shorter than the time period (602).
  • the display driver circuit (220) may change the state of the first signal (311) from the first state to the second state at time (606) (or timing (606)).
  • providing the first initialization voltage (Vint1) to the gate electrode (G) of the first transistor (301) may be interrupted by changing the state of the first signal (311) from the first state to the second state.
  • the display driving circuit (220) can change the state of the second signal (312) transmitted to the gate electrode (G) of the eighth transistor (308) from the second state to the first state at a time (610) (or timing (610)) after the time (606).
  • the display driving circuit (220) can electrically connect the gate electrode (G) of the first transistor (301) to the drain electrode (D) of the first transistor (301) via the eighth transistor (308) during the time period (611) by maintaining the state of the second signal (312) in the first state for a time period (611) from the time (610).
  • the display driving circuit (220) can change the state of the second signal (312) from the first state to the second state at a time period (612). Electrically connecting the gate electrode (G) of the first transistor (301) to the drain electrode (D) of the first transistor (301) through the eighth transistor (308) can be interrupted by changing the state of the second signal (312) from the first state to the second state.
  • the display driving circuit (220) can change the state of the fifth signal (315) transmitted to the gate electrode (G) of the first transistor (301) from the first state to the second state at time (610).
  • the display driving circuit (220) can provide the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) initialized according to the first signal (311) in the first state transmitted during the time period (605) by maintaining the state of the fifth signal (315) in the second state during a time period (611) from time (610).
  • providing the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) can be performed (or executed) during the time period (611).
  • providing the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) may be performed during a time period (611) during which the state of the second signal (312) is maintained as the first state.
  • providing the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) may be performed while the gate electrode (G) of the first transistor (301) is electrically connected to the drain electrode (D) of the first transistor (301) according to the second signal (312) within the first state.
  • the display driving circuit (220) may change the state of the fifth signal (315) from the second state to the first state at time (612).
  • Providing the data voltage (Vdata) to the gate electrode (G) of the first transistor (301) may be stopped according to changing the state of the fifth signal (315) from the second state to the first state.
  • the display driving circuit (220) can change the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state at a time (613) after a time (612).
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (614) by maintaining the state of the third signal (313) in the second state during a time period (614) from the time (613).
  • the display driving circuit (220) can adjust the threshold voltage of the first transistor (301) by providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (614).
  • a bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel may be different from a bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the bias voltage provided to the source electrode (S) of the first transistor (301) in the third sub-pixel to adjust the threshold voltage of the first transistor (301) in the third sub-pixel may be different from the bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel and/or the bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the bias voltage provided to the source electrode (S) of the first transistor (301) during the time period (614) may be the same as the bias voltage provided to the source electrode (S) of the first transistor (301) during the time period (608).
  • the bias voltage provided to the source electrode (S) of the first transistor (301) during the time period (614) may be different from the bias voltage provided to the source electrode (S) of the first transistor (301) during the time period (608).
  • the display driving circuit (220) may change the state of the third signal (313) from the second state to the first state at time (615).
  • Providing the bias voltage (Vbias) to the source electrode (S) of the first transistor (301) may be stopped in response to changing the state of the third signal (313) from the second state to the first state.
  • the display driving circuit (220) can change the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) from the second state to the first state at a time (616) after a time (615).
  • the time at which the state of the third signal (313) is changed from the first state to the second state may be before the time at which the state of the fourth signal (314) is changed from the second state to the first state.
  • the display driving circuit (220) can provide the second initialization voltage (Vint2) to the anode electrode of the OLED (300) during the time period (617) by maintaining the state of the fourth signal (314) in the first state during a time period (617) from the time (616).
  • the display driving circuit (220) can initialize the anode electrode of the OLED (300) by providing a second initialization voltage (Vint2) to the anode electrode of the OLED (300) during a time period (617).
  • the time period (614) during which the state of the third signal (313) is maintained in the second state may not overlap with the time period (617) during which the state of the fourth signal (314) is maintained in the first state.
  • the display driving circuit (220) can change the state of the fourth signal (314) from the first state to the second state at a time period (618).
  • Providing the second initialization voltage (Vint2) to the anode electrode of the OLED (300) may be interrupted by changing the state of the fourth signal (314) from the first state to the second state.
  • the display driving circuit (220) can cause the OLED (300) to emit light for displaying an image acquired from at least one processor (210) by providing a current (e.g., current (320) of FIG. 3) according to a data voltage (Vdata) to the OLED (300).
  • the display driving circuit (220) can provide the current (320) to the OLED (300) by providing a light-emitting signal (316) to each of the gate electrode (G) of the fifth transistor (305) and the gate electrode (G) of the sixth transistor (306) within a time interval (490).
  • the display driving circuit (220) can perform the second scan within the time period (450) before the light emitting signal (316) is transmitted to each of the gate electrode (G) of the fifth transistor (305) and the gate electrode (G) of the sixth transistor (306) within the time period (491).
  • the second scan can be performed while the data voltage (Vdata) provided within the time period (611) is maintained.
  • the time period (450) for performing the second scan can be included within the time period of the vertical synchronization signal that includes the time period (400) for performing the first scan.
  • the time period (450) for performing the second scan can also be included within the time period of the vertical synchronization signal that follows the time period of the vertical synchronization signal that includes the time period (400) for performing the first scan.
  • the display driving circuit (220) can change the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state at time (651) (or timing (651)) for the second scan.
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (652) by maintaining the state of the third signal (313) in the second state during a time period (652) from time (651).
  • the display driving circuit (220) can adjust the threshold voltage of the first transistor (301) by providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (652).
  • a bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel may be different from a bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the bias voltage provided to the source electrode (S) of the first transistor (301) in the third sub-pixel to adjust the threshold voltage of the first transistor (301) in the third sub-pixel may be different from the bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel and/or the bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the display driving circuit (220) may change the state of the third signal (313) from the second state to the first state at time (653).
  • Providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) can be stopped by changing the state of the third signal (313) from the second state to the first state.
  • the display driving circuit (220) can change the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state at a time (654) (or timing (654)) after the time (653) for the second scan.
  • the display driving circuit (220) can provide a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (655) by maintaining the state of the third signal (313) in the second state during a time period (655) from the time (654).
  • the display driving circuit (220) can adjust the threshold voltage of the first transistor (301) by providing a bias voltage (Vbias) to the source electrode (S) of the first transistor (301) during the time period (655).
  • a bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel may be different from a bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the bias voltage provided to the source electrode (S) of the first transistor (301) in the third sub-pixel to adjust the threshold voltage of the first transistor (301) in the third sub-pixel may be different from the bias voltage provided to the source electrode (S) of the first transistor (301) in the first sub-pixel to adjust the threshold voltage of the first transistor (301) in the first sub-pixel and/or the bias voltage provided to the source electrode (S) of the first transistor (301) in the second sub-pixel to adjust the threshold voltage of the first transistor (301) in the second sub-pixel.
  • the bias voltage provided to the source electrode (S) of the first transistor (301) during a time period (652) may be different from the bias voltage provided to the source electrode (S) of the first transistor (301) during a time period (655).
  • the display driving circuit (220) can change the state of the third signal (313) from the second state to the first state at time (656).
  • Providing the bias voltage (Vbias) to the source electrode (S) of the first transistor (301) can be stopped by changing the state of the third signal (313) from the second state to the first state.
  • the display driving circuit (220) can provide the OLED (300) with a current (e.g., current (320) of FIG. 3) according to the data voltage (Vdata) to light the OLED (300) to maintain the image acquired from at least one processor (210).
  • the display driving circuit (220) can provide the current (320) to the OLED (300) by providing a light emitting signal (316) to each of the gate electrode (G) of the fifth transistor (305) and the gate electrode (G) of the sixth transistor (306) within a time interval (491).
  • the display driving circuit (220) can reduce the time until the luminance of light emitted from the OLED (300) reaches the target luminance by performing the change of the state of the third signal (313) from the first state to the second state more frequently than the change of the state of the fourth signal (314) from the second state to the first state. This reduction in time is described and exemplified in more detail with reference to FIG. 7.
  • FIG. 7 is a chart showing how brightness changes depending on controlling a third transistor electrically connected to the first transistor independently of controlling a second transistor electrically connected to the first transistor.
  • the horizontal axis of the chart (700) and the horizontal axis of the chart (750) represent time
  • the vertical axis of the chart (700) and the vertical axis of the chart (750) represent the luminance of light emitted from the OLED (300).
  • a line (710) (or curve (710)) in the chart (700) represents a change in the luminance of light emitted from the OLED (300) when the number of times the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) changes from the first state to the second state is greater than the number of times the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) changes from the second state to the first state.
  • a line (760) (or curve (760)) in the chart (750) represents a change in the brightness of light emitted from the OLED (300) when the number of times the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) changes from the first state to the second state is equal to the number of times the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) changes from the second state to the first state.
  • Line (710) represents a change in the brightness of light emitted from the OLED (300) when the OLED (300) is illuminated four times according to a control that changes the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state more frequently than changes the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) from the second state to the first state.
  • Line (760) represents a change in the brightness of light emitted from the OLED (300) when the OLED (300) is illuminated four times according to a control performed in conjunction with changing the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state and changing the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) from the second state to the first state.
  • a line (710) within a time interval (711) corresponding to the first emission of the OLED (300) indicates that the luminance of light from the OLED (300) reaches the target luminance (T) after a time period (721) has elapsed
  • a line (760) within a time interval (761) corresponding to the first emission of the OLED (300) indicates that the luminance of light from the OLED (300) reaches the target luminance (T) after a time period (771) has elapsed.
  • the time period (721) may be substantially equal to the time period (771).
  • a line (710) within a time interval (712) corresponding to the second emission of the OLED (300) after the first emission of the OLED (300) indicates that the luminance of light from the OLED (300) reaches the target luminance (T) after a time period (722) shorter than the time period (721) has elapsed
  • a line (760) within a time interval (762) corresponding to the second emission of the OLED (300) indicates that the luminance of light from the OLED (300) reaches the target luminance (T) after a time period (772) substantially equal to the time period (771) has elapsed.
  • the control that changes the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state more frequently than the control that changes the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) from the second state to the first state can enhance the quality of an image displayed at a relatively low brightness on the display panel (240).
  • a line (710) within a time interval (713) corresponding to the third emission of the OLED (300) after the second emission of the OLED (300) indicates that the luminance of light from the OLED (300) reaches the target luminance (T) after a time period (723) shorter than the time period (721) has elapsed
  • a line (760) within a time interval (763) corresponding to the third emission of the OLED (300) indicates that the luminance of light from the OLED (300) reaches the target luminance (T) after a time period (773) substantially equal to the time period (771) has elapsed.
  • the control that changes the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state more frequently than the control that changes the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) from the second state to the first state can enhance the quality of an image displayed at a relatively low brightness on the display panel (240).
  • a line (710) within a time interval (714) corresponding to the fourth emission of the OLED (300) after the third emission of the OLED (300) indicates that the luminance of light from the OLED (300) reaches the target luminance (T) after a time period (724) shorter than the time period (721) has elapsed
  • a line (760) within a time interval (764) corresponding to the fourth emission of the OLED (300) indicates that the luminance of light from the OLED (300) reaches the target luminance (T) after a time period (774) substantially equal to the time period (771) has elapsed.
  • the control that changes the state of the third signal (313) transmitted to the gate electrode (G) of the second transistor (302) from the first state to the second state more frequently than that that changes the state of the fourth signal (314) transmitted to the gate electrode (G) of the third transistor (303) from the second state to the first state can enhance the quality of an image displayed at a relatively low brightness on the display panel (240).
  • FIG. 8 is a block diagram of an electronic device (801) within a network environment (800) according to various embodiments.
  • the electronic device (801) may communicate with the electronic device (802) via a first network (898) (e.g., a short-range wireless communication network), or may communicate with at least one of the electronic device (804) or the server (808) via a second network (899) (e.g., a long-range wireless communication network).
  • the electronic device (801) may communicate with the electronic device (804) via the server (808).
  • the electronic device (801) may include a processor (820), a memory (830), an input module (850), an audio output module (855), a display module (860), an audio module (870), a sensor module (876), an interface (877), a connection terminal (878), a haptic module (879), a camera module (880), a power management module (888), a battery (889), a communication module (890), a subscriber identification module (896), or an antenna module (897).
  • the electronic device (801) may omit at least one of these components (e.g., the connection terminal (878)), or may have one or more other components added.
  • some of these components e.g., the sensor module (876), the camera module (880), or the antenna module (897) may be integrated into one component (e.g., the display module (860)).
  • the processor (820) may, for example, execute software (e.g., a program (840)) to control at least one other component (e.g., a hardware or software component) of the electronic device (801) connected to the processor (820) and perform various data processing or operations.
  • the processor (820) may store commands or data received from other components (e.g., a sensor module (876) or a communication module (890)) in a volatile memory (832), process the commands or data stored in the volatile memory (832), and store result data in a non-volatile memory (834).
  • the processor (820) may include a main processor (821) (e.g., a central processing unit or an application processor) or an auxiliary processor (823) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (821).
  • a main processor e.g., a central processing unit or an application processor
  • an auxiliary processor e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor
  • the auxiliary processor (823) may be configured to use less power than the main processor (821) or to be specialized for a given function.
  • the auxiliary processor (823) may be implemented separately from the main processor (821) or as a part thereof.
  • the auxiliary processor (823) may control at least a portion of functions or states associated with at least one component (e.g., a display module (860), a sensor module (876), or a communication module (890)) of the electronic device (801), for example, on behalf of the main processor (821) while the main processor (821) is in an inactive (e.g., sleep) state, or together with the main processor (821) while the main processor (821) is in an active (e.g., application execution) state.
  • the auxiliary processor (823) e.g., an image signal processor or a communication processor
  • the auxiliary processor (823) may include a hardware structure specialized for processing artificial intelligence models.
  • the artificial intelligence models may be generated through machine learning. This learning can be performed, for example, in the electronic device (801) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (808)).
  • the learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above.
  • the artificial intelligence model can include a plurality of artificial neural network layers.
  • the artificial neural network can be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-networks, or a combination of two or more of the above, but is not limited to the examples described above.
  • the artificial intelligence model can additionally or alternatively include a software structure.
  • the memory (830) can store various data used by at least one component (e.g., the processor (820) or the sensor module (876)) of the electronic device (801).
  • the data can include, for example, software (e.g., the program (840)) and input data or output data for commands related thereto.
  • the memory (830) can include a volatile memory (832) or a non-volatile memory (834).
  • the program (840) may be stored as software in the memory (830) and may include, for example, an operating system (842), middleware (844), or an application (846).
  • the input module (850) can receive commands or data to be used in a component of the electronic device (801) (e.g., a processor (820)) from an external source (e.g., a user) of the electronic device (801).
  • the input module (850) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).
  • the audio output module (855) can output audio signals to the outside of the electronic device (801).
  • the audio output module (855) can include, for example, a speaker or a receiver.
  • the speaker can be used for general purposes, such as multimedia playback or recording playback.
  • the receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.
  • the display module (860) can visually provide information to an external party (e.g., a user) of the electronic device (801).
  • the display module (860) may include, for example, a display, a holographic device, or a projector, and a control circuit for controlling the device.
  • the display module (860) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.
  • the audio module (870) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (870) can acquire sound through the input module (850), output sound through the sound output module (855), or an external electronic device (e.g., electronic device (802)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (801).
  • an external electronic device e.g., electronic device (802)
  • electronic device (802) e.g., speaker or headphone
  • the sensor module (876) can detect the operating status (e.g., power or temperature) of the electronic device (801) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status.
  • the sensor module (876) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.
  • the interface (877) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (801) with an external electronic device (e.g., the electronic device (802)).
  • the interface (877) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.
  • HDMI high definition multimedia interface
  • USB universal serial bus
  • SD card interface Secure Digital Card
  • connection terminal (878) may include a connector through which the electronic device (801) may be physically connected to an external electronic device (e.g., the electronic device (802)).
  • the connection terminal (878) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).
  • the haptic module (879) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations.
  • the haptic module (879) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.
  • the camera module (880) can capture still images and videos.
  • the camera module (880) may include one or more lenses, image sensors, image signal processors, or flashes.
  • the power management module (888) can manage the power supplied to the electronic device (801).
  • the power management module (888) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).
  • PMIC power management integrated circuit
  • a battery (889) may power at least one component of the electronic device (801).
  • the battery (889) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.
  • the communication module (890) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (801) and an external electronic device (e.g., electronic device (802), electronic device (804), or server (808)), and the performance of communication through the established communication channel.
  • the communication module (890) may operate independently from the processor (820) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication.
  • the communication module (890) may include a wireless communication module (892) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (894) (e.g., a local area network (LAN) communication module, or a power line communication module).
  • a wireless communication module e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module
  • GNSS global navigation satellite system
  • wired communication module e.g., a local area network (LAN) communication module, or a power line communication module.
  • any of these communication modules may communicate with an external electronic device (804) via a first network (898) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (899) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)).
  • a first network e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)
  • a second network e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)
  • a first network e.g., a short
  • the wireless communication module (892) may use subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (896) to verify or authenticate the electronic device (801) within a communication network such as the first network (898) or the second network (899).
  • subscriber information e.g., an international mobile subscriber identity (IMSI)
  • IMSI international mobile subscriber identity
  • the wireless communication module (892) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology).
  • the NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimizing terminal power and connecting multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)).
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communications
  • URLLC ultra-reliable and low-latency communications
  • the wireless communication module (892) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate.
  • a high-frequency band e.g., mmWave band
  • the wireless communication module (892) may support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna.
  • the wireless communication module (892) may support various requirements specified in the electronic device (801), an external electronic device (e.g., the electronic device (804)), or a network system (e.g., the second network (899)).
  • the wireless communication module (892) may support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.
  • a peak data rate e.g., 20 Gbps or more
  • a loss coverage e.g., 164 dB or less
  • U-plane latency e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip
  • the antenna module (897) can transmit or receive signals or power to or from an external device (e.g., an external electronic device).
  • the antenna module (897) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB).
  • the antenna module (897) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (898) or the second network (899), may be selected from the plurality of antennas by, for example, the communication module (890).
  • a signal or power may be transmitted or received between the communication module (890) and the external electronic device via the at least one selected antenna.
  • another component e.g., a radio frequency integrated circuit (RFIC)
  • RFIC radio frequency integrated circuit
  • the antenna module (897) may form a mmWave antenna module.
  • the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band.
  • a first side e.g., a bottom side
  • a plurality of antennas e.g., an array antenna
  • At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).
  • peripheral devices e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).
  • commands or data may be transmitted or received between the electronic device (801) and an external electronic device (804) via a server (808) connected to a second network (899).
  • Each of the external electronic devices (802 or 804) may be the same or a different type of device as the electronic device (801).
  • all or part of the operations executed in the electronic device (801) may be executed in one or more of the external electronic devices (802, 804, or 808). For example, when the electronic device (801) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (801) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service.
  • One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (801).
  • the electronic device (801) may process the result as is or additionally and provide it as at least a portion of a response to the request.
  • cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example.
  • the electronic device (801) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example.
  • the external electronic device (804) may include an Internet of Things (IoT) device.
  • the server (808) may be an intelligent server utilizing machine learning and/or a neural network.
  • the external electronic device (804) or the server (808) may be included in the second network (899).
  • the electronic device (801) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.
  • FIG. 9 is a block diagram (900) of a display module (860) according to various embodiments.
  • the display module (860) may include a display (910) and a display driver IC (DDI) (930) for controlling the display (910).
  • the DDI (930) may include an interface module (931), a memory (933) (e.g., a buffer memory), an image processing module (935), or a mapping module (937).
  • the DDI (930) may receive image information including, for example, image data or an image control signal corresponding to a command for controlling the image data, from another component of the electronic device (801) through the interface module (931).
  • image information may be received from a processor (820) (e.g., a main processor (821) (e.g., an application processor) or an auxiliary processor (823) (e.g., a graphics processing unit) that operates independently of the function of the main processor (821).
  • the DDI (930) may communicate with a touch circuit (950) or a sensor module (876) through the interface module (931).
  • the DDI (930) may store at least a part of the received image information in the memory (933), for example, in units of frames.
  • the image processing module (935) may, for example, perform preprocessing or postprocessing (e.g., resolution, brightness, or size adjustment) on at least a part of the image data based at least on the characteristics of the image data or the characteristics of the display (910).
  • the mapping module (937) may generate a voltage value or a current value corresponding to the image data that has been preprocessed or postprocessed through the image processing module (935). According to one embodiment, the voltage The generation of the value or current value may be performed at least in part based on, for example, properties of the pixels of the display (910), such as the arrangement of the pixels (RGB stripe or pentile structure), or the size of each of the sub-pixels.
  • At least some of the pixels of the display (910) may be driven at least in part based on, for example, the voltage value or current value, so that visual information (e.g., text, an image, or an icon) corresponding to the image data may be displayed through the display (910).
  • visual information e.g., text, an image, or an icon
  • the display module (860) may further include a touch circuit (950).
  • the touch circuit (950) may include a touch sensor (951) and a touch sensor IC (953) for controlling the same.
  • the touch sensor IC (953) may control the touch sensor (951) to detect, for example, a touch input or a hovering input for a specific location of the display (910).
  • the touch sensor IC (953) may detect a touch input or a hovering input by measuring a change in a signal (e.g., voltage, light quantity, resistance, or charge quantity) for a specific location of the display (910).
  • a signal e.g., voltage, light quantity, resistance, or charge quantity
  • the touch sensor IC (953) may provide information (e.g., location, area, pressure, or time) regarding the detected touch input or hovering input to the processor (820).
  • information e.g., location, area, pressure, or time
  • at least a portion of the touch circuit (950) may be included as part of the display driver IC (930), or as part of the display (910), or as part of another component (e.g., auxiliary processor (823)) disposed external to the display module (860).
  • the display module (860) may further include at least one sensor (e.g., a fingerprint sensor, an iris sensor, a pressure sensor, or an illuminance sensor) of the sensor module (876), or a control circuit therefor.
  • the at least one sensor or the control circuit therefor may be embedded in a part of the display module (860) (e.g., the display (910) or the DDI (930)) or a part of the touch circuit (950).
  • the biometric sensor may obtain biometric information (e.g., a fingerprint image) associated with a touch input through a part of the display (910).
  • the sensor module (876) embedded in the display module (860) includes a pressure sensor, the pressure sensor may obtain pressure information associated with a touch input through a part or the entire area of the display (910).
  • the touch sensor (951) or sensor module (876) may be positioned between pixels of a pixel layer of the display (910), or above or below the pixel layer.
  • an electronic device may include a display driving circuit (e.g., display driving circuit (220)), a display panel (e.g., display panel (240)) including pixels, a first gate driver circuit, and a second gate driver circuit.
  • a display driving circuit e.g., display driving circuit (220)
  • a display panel e.g., display panel (240)
  • Each of the pixels may include sub-pixels.
  • Each of the above sub-pixels may include a light-emitting element (e.g., OLED (300)), a storage capacitor (e.g., capacitor (309)) configured to store a data voltage, a gate electrode electrically connected to the storage capacitor, a source electrode, and a drain electrode electrically connectable to an anode electrode of the light-emitting element, and a first transistor (e.g., first transistor (301)) configured to obtain, generate, or apply a current to be provided to the light-emitting element according to the data voltage stored in the storage capacitor, a second transistor (e.g., second transistor (302)) including a drain electrode electrically connected to the source electrode of the first transistor, and a third transistor (e.g., third transistor (303)) including a source electrode electrically connected to the anode electrode of the light-emitting element.
  • a light-emitting element e.g., OLED (300)
  • a storage capacitor e.g., capacitor (309)
  • the display driving circuit may be configured to adjust a threshold voltage of the first transistor by providing a bias voltage (e.g., a bias voltage (Vbias)) to the source electrode of the first transistor based on controlling the first gate driver circuit to change a state of a first signal (e.g., a third signal (313)) transmitted to the gate electrode of the second transistor.
  • a bias voltage e.g., a bias voltage (Vbias)
  • Vbias bias voltage
  • the display driving circuit may be configured to initialize the anode electrode of the light-emitting element by providing an initialization voltage (e.g., a second initialization voltage (Vint2)) to the anode electrode of the light-emitting element based on controlling the second gate driver circuit to change a state of a second signal (e.g., a fourth signal (314)) transmitted to the gate electrode of the third transistor.
  • the sub-pixels may include a first sub-pixel configured to emit light with a first color and a second sub-pixel configured to emit light with a second color.
  • a first bias voltage provided to the source electrode of the first transistor in the first sub-pixel according to the change in the state of the first signal may be different from a second bias voltage provided to the source electrode of the first transistor in the second sub-pixel according to the change in the state of the first signal.
  • controlling the first gate driver circuit to change the state of the first signal can be performed independently from controlling the second gate driver circuit to change the state of the second signal.
  • the display driving circuit may be configured to adjust the threshold voltage of the first transistor by changing the state of the first signal from the first state to the second state, and to initialize the anode electrode of the light-emitting element by changing the state of the second signal from the second state to the first state.
  • the second transistor may include a PMOS (P-channel metal oxide semiconductor) transistor.
  • the third transistor may include an NMOS (N-channel metal oxide semiconductor) transistor.
  • changing the state of the first signal may be performed more frequently than changing the state of the second signal.
  • the display driving circuit may be configured to change the state of the first signal and change the state of the second signal while performing a first scan, which includes initializing the gate terminal of the first transistor, providing the data voltage to the initialized gate terminal of the first transistor, and providing current to the light emitting element through the first transistor having the provided data voltage at the gate terminal.
  • the display driving circuit may be configured to change the state of the first signal and skip changing the state of the second signal while performing a second scan, which includes providing current to the light emitting element through the first transistor while the data voltage according to the first scan is maintained by skipping initializing the gate terminal of the first transistor.
  • a first time duration during which the first signal is in the second state as a result of changing the state of the first signal while performing the first scan may at least partially overlap with a second time duration during which the second signal is in the first state as a result of changing the state of the second signal while performing the first scan.
  • the length of the first time period may be different from the length of the second time period.
  • the length of the first time period may be the same as the length of the second time period.
  • changing the state of the second signal while performing the first scan may be performed after changing the state of the first signal while performing the first scan.
  • changing the state of the first signal may be performed N times (e.g., N is a natural number greater than 1) while performing the first scan.
  • changing the state of the second signal can be performed M times (e.g., M is a natural number greater than or equal to 1 and less than N) while performing the first scan.
  • changing the state of the first signal can be performed N times (N is a natural number greater than 1) while performing the second scan.
  • changing the state of the second signal can be performed M times (M is a natural number greater than or equal to 1 and less than N) while performing the second scan.
  • the first scan and the second scan can be performed within the time interval of one vertical synchronization signal.
  • the sub-pixels may include a third sub-pixel configured to emit light in a third color.
  • the first bias voltage provided to the source electrode of the first transistor in the first sub-pixel in response to the change in the state of the first signal may be different from the third bias voltage provided to the source electrode of the first transistor in the third sub-pixel in response to the change in the state of the first signal.
  • the second bias voltage provided to the source electrode of the first transistor in the second sub-pixel in response to the change in the state of the first signal may be different from the third bias voltage provided to the source electrode of the first transistor in the third sub-pixel in response to the change in the state of the first signal.
  • the first color may be red.
  • the second color may be green.
  • the third color may be blue.
  • the third bias voltage may be higher than the first bias voltage and the second bias voltage.
  • the first bias voltage may be higher than the second bias voltage.
  • each of the sub-pixels may include a fourth transistor (e.g., a fifth transistor (305), or an operation control transistor) including a gate electrode configured to obtain a light emission signal, a source electrode electrically connected to a driving voltage wire transmitting a driving voltage, and a drain electrode electrically connected to the source electrode of the first transistor, and a fifth transistor (e.g., a sixth transistor (306), or an operation control transistor) including a gate electrode configured to obtain the light emission signal, a source electrode electrically connected to the drain electrode of the first transistor, and a drain electrode electrically connected to the anode electrode of the light emitting element.
  • a fourth transistor e.g., a fifth transistor (305), or an operation control transistor
  • a fifth transistor e.g., a sixth transistor (306), or an operation control transistor
  • a node electrically connecting the source electrode of the first transistor and the drain electrode of the second transistor may also be electrically connected to the drain electrode of the fourth transistor.
  • a node electrically connecting the drain electrode of the fifth transistor and the anode electrode of the light emitting element may also be electrically connected to the source electrode of the third transistor.
  • the display driving circuit may be configured to provide the current obtained by the first transistor to the light-emitting element by providing the light-emitting signal to the gate electrode of the fourth transistor and the gate electrode of the fifth transistor.
  • each of the sub-pixels may include a first electrical path connected to the gate electrode of the second transistor for the first signal, and a second electrical path connected to the gate electrode of the third transistor for the second signal.
  • the second electrical path may be electrically isolated from the first electrical path.
  • the light-emitting element may include an OLED (organic light emitting diode).
  • Electronic devices may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices.
  • first,” “second,” or “first” or “second” may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order).
  • a component e.g., a first component
  • another e.g., a second component
  • functionally e.g., a third component
  • module used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit.
  • a module may be an integral component, or a minimum unit or part of such a component that performs one or more functions.
  • a module may be implemented in the form of an application-specific integrated circuit (ASIC).
  • ASIC application-specific integrated circuit
  • Various embodiments of the present document may be implemented as software (e.g., a program (840)) including one or more instructions stored in a storage medium (e.g., an internal memory (836) or an external memory (838)) readable by a machine (e.g., an electronic device (801)).
  • a processor e.g., a processor (820)
  • the machine e.g., an electronic device (801)
  • the one or more instructions may include code generated by a compiler or code executable by an interpreter.
  • the machine-readable storage medium may be provided in the form of a non-transitory storage medium.
  • ‘non-transitory’ simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.
  • the method according to various embodiments disclosed in this document may be provided as included in a computer program product.
  • the computer program product may be traded as a commodity between a seller and a buyer.
  • the computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play StoreTM) or directly between two user devices (e.g., smart phones).
  • an application store e.g., Play StoreTM
  • at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.
  • each component e.g., a module or a program of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components.
  • one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added.
  • a plurality of components e.g., a module or a program
  • the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration.
  • the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

La présente invention décrit une unité d'affichage. L'unité d'affichage peut comprendre un circuit d'attaque d'affichage. L'unité d'affichage peut comprendre un écran d'affichage comprenant des pixels. L'unité d'affichage peut comprendre un premier circuit d'attaque de grille. L'unité d'affichage peut comprendre un second circuit d'attaque de grille. Chacun des pixels peut comprendre des sous-pixels. Chacun des sous-pixels peut comprendre un élément émetteur de lumière.
PCT/KR2025/095227 2024-05-21 2025-04-16 Unité d'affichage et dispositif électronique la comprenant Pending WO2025244488A1 (fr)

Applications Claiming Priority (4)

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KR20240066107 2024-05-21
KR10-2024-0066107 2024-05-21
KR10-2024-0076437 2024-06-12
KR1020240076437A KR20250166689A (ko) 2024-05-21 2024-06-12 디스플레이 및 그를 포함하는 전자 장치

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WO2025244488A1 true WO2025244488A1 (fr) 2025-11-27

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160032740A (ko) * 2014-09-16 2016-03-25 삼성디스플레이 주식회사 전압 공급 회로 및 이를 포함하는 디스플레이 장치
KR102281222B1 (ko) * 2019-01-11 2021-07-22 애플 인크. 하이브리드 픽셀 내 및 외부 보상을 갖는 전자 디스플레이
KR20220029328A (ko) * 2020-08-28 2022-03-08 삼성전자주식회사 디스플레이 장치 및 그 제어 방법
KR20220134810A (ko) * 2021-03-25 2022-10-06 삼성디스플레이 주식회사 표시 장치
KR20230148378A (ko) * 2021-11-25 2023-10-24 윤구(구안) 테크놀로지 컴퍼니 리미티드 픽셀 회로 및 그 구동 방법과 디스플레이 패널

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160032740A (ko) * 2014-09-16 2016-03-25 삼성디스플레이 주식회사 전압 공급 회로 및 이를 포함하는 디스플레이 장치
KR102281222B1 (ko) * 2019-01-11 2021-07-22 애플 인크. 하이브리드 픽셀 내 및 외부 보상을 갖는 전자 디스플레이
KR20220029328A (ko) * 2020-08-28 2022-03-08 삼성전자주식회사 디스플레이 장치 및 그 제어 방법
KR20220134810A (ko) * 2021-03-25 2022-10-06 삼성디스플레이 주식회사 표시 장치
KR20230148378A (ko) * 2021-11-25 2023-10-24 윤구(구안) 테크놀로지 컴퍼니 리미티드 픽셀 회로 및 그 구동 방법과 디스플레이 패널

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