WO2018038338A1 - 디스플레이 장치 및 그 구동 방법 - Google Patents
디스플레이 장치 및 그 구동 방법 Download PDFInfo
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- WO2018038338A1 WO2018038338A1 PCT/KR2017/002490 KR2017002490W WO2018038338A1 WO 2018038338 A1 WO2018038338 A1 WO 2018038338A1 KR 2017002490 W KR2017002490 W KR 2017002490W WO 2018038338 A1 WO2018038338 A1 WO 2018038338A1
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- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
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- 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]
Definitions
- the present invention relates to a display apparatus and a control method thereof, and more particularly, to a display apparatus having a display composed of a self-luminous element driven by a current and a driving method thereof.
- LEDs Light Emitting Diodes
- LEDs are semiconductor light emitting devices that convert current into light. Recently, the light emitting diode is gradually increasing in brightness, and is being used as a light source for a display, an automotive light source, and an illumination light source.
- Such a light emitting diode can display an image with high luminance as the current increases.
- the peak luminance of each display module is determined based on the rated power capacity provided by each display module.
- an object of the present invention is to provide a display apparatus and a driving method thereof capable of maximizing a peaking effect through power sharing between a plurality of display modules when implementing peak luminance.
- a display apparatus including a display including a plurality of display modules, a display driver including a plurality of driving modules connected to each of the plurality of display modules, and a display element.
- Storage for storing the current control information for each luminance, and the maximum amount of power available to each of the plurality of display modules based on the total power capacity provided by the plurality of driving modules and the individual power consumption of each of the plurality of display modules.
- the peak brightness level of each of the plurality of display modules is calculated based on the calculated maximum power amount, and each of the plurality of display modules has a corresponding peak brightness level based on the current control information.
- the total power capacity may be calculated by the sum of the rated power capacity that can be provided by each of the plurality of driving modules.
- the processor may further include the plurality of processors based on a total power capacity that can be provided by the plurality of driving modules, and a ratio between the total power consumption of the plurality of display modules and the individual power consumption of each of the plurality of display modules. The maximum amount of power available to each display module can be calculated.
- the current control information may include current control information for each luminance of each subpixel that is calibrated based on luminance and color characteristics of each subpixel that constitutes the plurality of display modules.
- the plurality of driving modules may be controlled such that each of the plurality of display modules has a corresponding peak luminance level based on information stored in the storage.
- the current control information stored in the storage may include a current gain value for each luminance of each of the subpixels, which is calibrated based on luminance level information according to the current of each subpixel and color shift information according to the current of each subpixel. It may include.
- the storage may further store brightness level information for each power provided to a display module
- the processor may be configured to store the plurality of power levels based on the maximum brightness level information for each power and the maximum amount of power available in each of the plurality of display modules.
- the peak luminance level of each of the display modules can be calculated.
- the processor may be further configured to obtain, from the storage, a current gain value for each sub-pixel corresponding to each of the plurality of display modules for each of the plurality of display modules having the calculated peak luminance level.
- the driving state of each of the plurality of driving modules may be controlled based on the current gain value of each subpixel.
- the storage may further store power information of each sub-pixel for each gray level of the image
- the processor may be further configured based on the gray level value of the image displayed on each of the plurality of display modules and the power information of each sub-pixel for each gray level.
- the power consumption of each of the plurality of display modules can be calculated.
- each of the plurality of display modules is implemented as an LED cabinet (cabinet) including a plurality of LED elements, each of the sub-pixels, R (Red) LED, G (Green) LED, B (Blue) LED pixel This can be
- the driving method of the display device including a display consisting of a plurality of display modules according to an embodiment of the present invention, the total power capacity that can be provided by a plurality of drive modules for driving the plurality of display modules and the plurality of Calculating a maximum amount of power available to each of the plurality of display modules based on the respective amount of power consumption of each of the display modules; and a peak of each of the plurality of display modules based on the calculated maximum amount of power. Calculating a luminance level and driving the plurality of display modules such that each of the plurality of display modules has a corresponding peak luminance level.
- the total power capacity may be calculated by the sum of the rated power capacity that can be provided by each of the plurality of driving modules.
- the calculating of the maximum power amount may include a ratio between the total power capacity that can be provided by the plurality of driving modules, the total power consumption of the plurality of display modules, and the individual power consumption of each of the plurality of display modules.
- the maximum amount of power available to each of the plurality of display modules may be calculated based on the.
- the display apparatus may further include a storage including current control information for each luminance of each subpixel that is calibrated based on luminance and color characteristics according to the current of each subpixel constituting the plurality of display modules.
- the plurality of display modules may be driven such that each of the plurality of display modules has a corresponding peak luminance level based on current control information stored in the storage.
- the current control information stored in the storage may include a current gain value for each luminance of each of the subpixels, which is calibrated based on luminance level information according to the current of each subpixel and color shift information according to the current of each subpixel. It may include.
- the storage may further store brightness level information for each power provided to the display module, and calculating the peak brightness level may be used in each of the plurality of display modules and the maximum brightness level information for each power.
- the peak luminance level of each of the plurality of display modules can be calculated based on the maximum amount of power possible.
- the driving of the plurality of display modules may include: obtaining current gain values for each sub-pixel corresponding to each of the plurality of display modules for each of the plurality of display modules having the calculated peak luminance level, from the storage;
- the display module may be configured to drive the plurality of display modules based on the obtained current gain value of each sub-pixel.
- the storage may further store power information of each subpixel of each gray level of the image, and calculating the peak luminance level may include a gray level value of the image displayed on each of the plurality of display modules and the gray level.
- the amount of power consumed by each of the plurality of display modules may be calculated based on power information of each subpixel.
- each of the plurality of display modules is implemented as an LED cabinet (cabinet) including a plurality of LED elements, each of the sub-pixels, R (Red) LED, G (Green) LED, B (Blue) LED pixel This can be
- a peaking effect may be maximized through power sharing between the plurality of display modules when implementing peak luminance.
- the color shift phenomenon due to the increase of the current input to each sub-pixel can be prevented, the image quality of the image provided to the user can be improved.
- FIG. 1 is a diagram schematically illustrating a configuration of a display apparatus according to an exemplary embodiment.
- FIG. 2 is a block diagram illustrating a configuration of a display apparatus according to an exemplary embodiment.
- 3A and 3B are diagrams for describing a power consumption calculation method of each display module according to an exemplary embodiment.
- FIG. 4 is a diagram illustrating power information of each subpixel of each gray level of an image according to an exemplary embodiment.
- FIG. 5 is a view for explaining a power sharing method between a plurality of display modules according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating maximum luminance level information for each power provided to a display module according to an exemplary embodiment.
- FIG. 7 is a diagram illustrating current gain information for each luminance of each subpixel according to an exemplary embodiment of the present invention.
- FIG. 8 is a view for explaining the luminance characteristics of the R / G / B LED device according to the increase of the current to help the understanding of the present invention.
- 9A to 9C are views for explaining a color shift characteristic of an R / G / B LED device according to an increase in current for better understanding of the present invention.
- FIG. 10 is a flowchart illustrating a method of driving a display apparatus according to an exemplary embodiment.
- FIG. 1 is a diagram schematically illustrating a configuration of a display apparatus according to an exemplary embodiment.
- the display apparatus 100 physically controls a plurality of display modules 110-1, 110-2, 110-3, and 110-4... It can be implemented in a connected form.
- each of the plurality of display modules may include a plurality of pixels, for example, self-luminous pixels, arranged in a matrix form.
- the display module may be implemented as an LED module in which each of the plurality of pixels is implemented as an LED pixel, or an LED cabinet to which a plurality of LED modules are connected, but is not limited thereto.
- the display module may be implemented as a liquid crystal display (LCD), an organic LED (OLED), an active-matrix OLED (AMOLED), a plasma display panel (PDP), or the like.
- LCD liquid crystal display
- OLED organic LED
- AMOLED active-matrix OLED
- PDP plasma display panel
- LEDs can display images with high brightness as the applied current increases, and when using a display composed of a plurality of LED display modules (e.g., LED cabinets), it is necessary to provide the rated power capacity provided by each display module. Based on the determination, the peak luminance of each display module is determined.
- the peaking effect can be maximized through power sharing between the plurality of display modules when implementing the peak brightness.
- FIG. 2A is a block diagram illustrating a configuration of a display apparatus according to an exemplary embodiment.
- the display apparatus 100 includes a display 110, a storage 120, and a processor 130.
- the display 110 includes a plurality of display modules.
- the display 110 may be configured to be assembled by connecting a plurality of display modules 110-1,..., 110-n.
- each of the plurality of display modules may include a plurality of pixels, for example, self-luminous pixels, arranged in a matrix form.
- the display 110 may be implemented as a plurality of LED modules (LED modules including at least one LED element) and / or a plurality of LED cabinets.
- the LED module may include a plurality of LED pixels.
- the LED pixels may be implemented as RGB LEDs, and the RGB LEDs may include RED LED, GREEN LED, and BLUE LED together.
- the display driver 120 drives the display 110 under the control of the processor 140.
- the display driver 120 applies a driving voltage or flows a driving current to drive each of the self-luminescent elements constituting the display panel 110, for example, an LED pixel, under the control of the processor 140. , Driving each LED pixel.
- the display driver 120 includes a plurality of LED driving modules 120-1,..., 120-n connected to each of the plurality of display modules 110-1,.
- the plurality of LED driving modules 120-1,..., 120-n may correspond to the respective control signals input from the processor 140 to be described later.
- the driving current is supplied to the plurality of display modules 110-1,..., 110-n.
- the plurality of LED driving modules 120-1,..., 120-n may correspond to a plurality of display modules 110-1,..., 110-n to correspond to respective control signals input from the processor 140. Output by adjusting supply time or intensity of driving current supplied to).
- Each of the plurality of LED driving modules 120-1,..., 120-n may have a power supply for power supply.
- the power supply is hardware that converts alternating current into direct current so that it can be stably used in each of the plurality of display modules 110-1, ... 110-n and supplies power for each system.
- the power supply can be largely composed of an input electromagnetic interference (EMI) filter unit, an AC-DC rectifying unit, a DC-DC switching converter, an output filter, and an output unit.
- the power supply may be implemented, for example, with a switched mode power supply (SMPS).
- SMPS is a DC stabilized power supply that stabilizes the output by controlling the on-off time ratio of the semiconductor switch element, and thus, high efficiency, small size, and light weight can be achieved.
- n can be used to drive each.
- the display driver 120 is in the form of a single drive module that separately drives a plurality of SMPS that supplies power to each of the plurality of display modules 110-1,. Can be implemented.
- each of the plurality of display modules may be implemented to include a subprocessor for controlling the operation of each display module and a driving module for driving each display module according to the control of the subprocessor.
- each subprocessor and the driving module may be implemented by hardware, software, firmware or integrated chip (IC).
- each subprocessor may be implemented as a separate semiconductor IC.
- the storage 130 stores various data necessary for the operation of the display apparatus 100.
- the storage 130 may include a nonvolatile memory, a volatile memory, a hard disk drive (HDD) or a solid state drive (SSD), a memory card mounted on the display device 100 (eg, micro SD card, USB memory, etc.), It may be implemented as an external memory (eg, USB memory, etc.) connectable to an external input port.
- a nonvolatile memory e.g., a volatile memory
- HDD hard disk drive
- SSD solid state drive
- a memory card mounted on the display device 100 eg, micro SD card, USB memory, etc.
- It may be implemented as an external memory (eg, USB memory, etc.) connectable to an external input port.
- the storage 130 may store current information of the plurality of display modules 110-1,..., 110-n.
- the current information may store current control information for each subpixel constituting the display module according to luminance of each subpixel.
- the star current control information according to the luminance of each subpixel is controlled according to the luminance of each subpixel that is calibrated (modeled) based on the luminance characteristic and the color shift characteristic according to the current of each subpixel. It can be information.
- the R / G / B LEDs exhibit different luminance changes and color shifts with current.
- the LED is a current driving device and the brightness varies according to the current, and the R / G / B LED has a unique resistance value for each color. Accordingly, when the same current and voltage are applied to each other, the applied power varies, so that the luminance of each R / G / B LED is different.
- the R / G / B LED has a color shift phenomenon as the applied current increases, and has a different color shift value for each R / G / B LED. Accordingly, when the current value is collectively increased to implement high brightness in a display composed of LEDs, deterioration in image quality due to luminance deviation and color shift may occur. Accordingly, in one embodiment of the present invention, the current control information for each R / G / B LED that is calibrated to compensate for luminance deviation and color shift for each R / G / B LED may be stored.
- the current control information for each luminance of each subpixel is based on the luminance level information according to the current of each subpixel and the color shift information according to the current of each subpixel. It may be information including a gain value.
- the luminance level information according to the current for each subpixel is the luminance change information according to the current change for each R / B / G LED element
- the color information according to the current for each subpixel is the R / B / G LED element. It may be a degree of change in color coordinates (for example, x and y color coordinates) according to a change in star current.
- the current gain information for each luminance of each subpixel is calibrated with a current value such that the luminance variation of each R / B / G LED element according to the current change is similar, and the color for each R / B / G LED element according to the current change. It may be a current gain value for each luminance of each sub-pixel obtained by calibrating so that a shift phenomenon does not occur.
- the storage 130 may store brightness level information for each power provided to the display module. That is, as the power supplied to the display module increases, the brightness of the display module increases, but when the supply power exceeds a predetermined threshold value, the brightness increase rate of the display module gradually decreases and does not increase above the maximum luminance value. As a result, information about the change in luminance of the display module according to the change in supply power may be measured and stored in the storage 130.
- the brightness level information for each power may be brightness increase amount information according to the power increase amount.
- the information is not limited to this type of information and can be applied as long as it is information indicating a relationship between the supply power and the brightness.
- the storage 130 may store power information of each sub-pixel for each gray level. Since the gray level of the image is related to the luminance value, the power for each R / G / B LED element required to express the image of the predetermined gray level is changed. As such, power information of each R / G / B LED device for each gray level of the image may be stored in the storage 130.
- Power information of each of the R / G / B LED elements may be stored in the storage 130.
- the power information for each gray level may be measured and stored in the storage 130. That is, the power information for each gray level may be obtained by measuring the amount of power consumed by the R / G / B LED device while displaying the gray level image on the display module.
- the storage 130 may store information about a binning group, information about a maximum luminance for each pixel, information about a color for each pixel, and a luminance correction coefficient for each pixel.
- the binning group may be an LED pixel group having the same characteristics (brightness, color coordinates, etc.) as much as possible for the LED pixel.
- the luminance correction coefficient may be in the form of a 3 * 3 matrix for realizing the target R / G / B luminance, and by applying different luminance correction coefficients to each pixel so that the maximum luminance becomes the target luminance, uniformity (uniformity) can be implemented.
- uniformity uniformity
- the color temperature may also be calibrated to have uniformity.
- the storage 120 may further store information on the number of pixels, the size of the pixels, and the distance between the pixels constituting each of the plurality of display modules.
- the above-described information stored in the storage 130 may be obtained from an external device without being stored in the storage 130.
- some information may be received in real time from an external device such as a set top box, an external server, a user terminal, or the like.
- the processor 140 controls the overall operation of the display apparatus 100.
- the processor 140 may include one or more of a central processing unit (CPU), a controller, an application processor (AP), a communication processor (CP), and an ARM processor. It may include.
- the processor 140 may include a graphic processing unit (not shown) for graphic processing corresponding to the image.
- the processor 130 may be implemented as a system on chip (SoC) including a core (not shown) and a GPU (not shown).
- SoC system on chip
- the processor 130 may include a single core, dual core, triple core, quad core, and multiple cores thereof.
- the processor 140 may provide a total power capacity and a plurality of display modules 110-1,... Which may be provided by the plurality of driving modules 120-1,. 110-n)
- the maximum amount of power available to each of the plurality of display modules 110-1,... 110-n may be calculated based on the respective amount of power consumption.
- the processor 140 calculates peak luminance levels of each of the plurality of display modules 110-1,... 110-n based on the calculated maximum power amount, and stores the current stored in the storage 130.
- the plurality of display modules 110-1,..., 120-n may be controlled such that each of the plurality of display modules 110-1,... 110-n has a corresponding peak luminance level based on the control information. Can be.
- the processor 140 may be configured by the sum of the rated power capacities that can be provided by each of the plurality of drive modules 120-1, ... 120-n.
- the total power capacity that can be provided by n) can be calculated.
- the capacities that can be provided by the plurality of drive modules 120-1,..., 120-n may include a plurality of power supplies included in each of the plurality of drive modules 120-1,. It can be the rated capacity (or rated power) of the SMPS.
- the plurality of display modules 110-1 For example, as illustrated in FIG. 2B, the plurality of display modules 110-1,. It is assumed that the case is driven by the fourth driving module (110-1 to 110-4), respectively.
- the processor 140 may be configured based on gray level values of an image displayed on each of the plurality of display modules 110-1,..., 110-n and power information of each sub-pixel for each gray level obtained from the storage 130. The amount of power consumed by each of the plurality of display modules 110-1,..., 110-n can be calculated.
- one input image frame is divided and displayed on the first to fourth display modules 110-1 to 110-4.
- image gradations corresponding to each of the first to fourth image regions provided to the first to fourth display modules 110-1 to 110-4 generally differ. This is because when one image frame is divided into a plurality of image regions, the images included in each divided image region are different.
- the processor 140 may display an image to be represented by each of the subpixels, that is, each of R / G / B in order for the first to fourth display modules 110-1 to 110-4 to display the first to fourth image areas.
- the amount of power consumed by the first to fourth display modules 110-1 to 110-4 may be calculated based on the gray value.
- the processor 140 consumes power from the first to fourth display modules 110-1 to 110-4 based on the power information of each R / G / B LED element for each gray level stored in the storage 130. Can be calculated.
- FIG. 4 is a diagram illustrating power information of each subpixel of each gray level of an image according to an exemplary embodiment.
- the amount of power consumed may be different.
- a red LED device has a relatively large power required to express the same grayscale value as compared to a green LED device and a blue LED device, and a green LED device and a blue LED device have almost the same power to represent the same grayscale value. Required.
- the power value required for the gradation representation of the image for each R / G / B LED element is pre-stored in the storage 130, and the processor 140 based on the pre-stored information, the first to fourth display modules 110. -1 to 110 -4) can calculate each individual power consumption amount.
- individual power consumptions of the first to fourth display modules 110-1 to 110-4 may be calculated as 60 W, 100 W, 70 W, and 50 W, respectively.
- the processor 140 may include the total power capacity 800W and the first to fourth display modules 110-1 to 110-4 provided by the first to fourth display modules 110-1 to 110-4.
- the maximum amount of power available to each of the first to fourth display modules 110-1 to 110-4 may be calculated based on the individual power consumption amounts of 60W, 100W, 70W, and 50W.
- the processor 140 may include the total power consumption of the plurality of display modules 120-1,..., 120-n and the plurality of display modules 110-1,.
- the maximum amount of power available to each of the plurality of display modules 110-1,... 110-n may be calculated based on the ratio between the respective amounts of power consumption.
- the processor 140 may include the total power consumption of the plurality of display modules 120-1,..., 120-n to the total power capacity of the plurality of display modules 120-1,. Multiplied by the amount and the ratio between the individual power consumption amounts of each of the plurality of display modules 110-1,... 110-n, so that the maximum available in each of the plurality of display modules 110-1,. The amount of power can be calculated.
- the maximum power amount of each of the first to fourth display modules 110-1 to 110-4 is 800 * (60W / 280W), 800 * (100W / 280W), 800 * ( 70W / 280W), 800 * (50W / 280W).
- the maximum power of each of the first to fourth display modules 110-1 to 110-4 is 60W + 520 *. It can be calculated as (60W / 280W), 100W + 520 * (100W / 280W), 70W + 520 * (70W / 280W), 50W + 520 * (50W / 280W).
- the processor 140 may determine the ratio between the total power consumption and the total power capacity of the plurality of display modules 120-1,.
- the maximum amount of power available to each of the plurality of display modules 110-1,... 110-n can be calculated by multiplying the power consumption of .120-n).
- the maximum amount of power of each of the first to fourth display modules 110-1 to 110-4 is 60 * (800/280), 100 * (800W / 280W), 70 * ( 800W / 280W), 50 * (800W / 280W) can be calculated.
- the method of calculating the maximum amount of power available to each of the plurality of display modules 110-1 to 110-n is not limited to the above-described embodiments, and various methods may be applied.
- the processor 140 corresponds to the maximum amount of power of each of the plurality of display modules 110-1,... 110-n based on the maximum brightness level information for each power provided to the display module stored in the storage 130.
- the peak luminance level to be determined can be determined.
- FIG. 5 is a view for explaining a power sharing method between a plurality of display modules according to an embodiment of the present invention.
- each display module 110-1 to 110-4 may share power through a connection between a DC terminal (or an AC terminal).
- the connection between the DC terminals (or the AC terminals) is not limited to the configuration shown in FIG. 5, and may be implemented in various configurations in which power sharing is possible between the display modules 110-1 to 110-4.
- FIG. 6 is a diagram illustrating maximum luminance level information for each power provided to a display module according to an exemplary embodiment.
- the maximum luminance level information for each power may be a diagram showing an amount of luminance increase according to an amount of power increase. As shown, as the amount of power increase increases, the amount of luminance increased for the same amount of power gradually decreases.
- the information that can be used according to an embodiment of the present invention is applicable as long as it is information indicating a relationship between the supply power and the brightness, but is not limited thereto.
- the processor 140 may determine the peak luminance level of each of the plurality of display modules 110-1,... 110-n based on this information.
- the processor 140 may include the plurality of display modules 110-1,..., 110-n for each of the plurality of display modules 110-1,..., 110-n to have a calculated target peak luminance level.
- a current gain value of each sub-pixel corresponding to each is obtained from the storage 130, and each of the plurality of driving modules 120-1,..., 120-n is based on the obtained current gain value of each sub-pixel.
- the driving state can be controlled.
- the storage 130 may store current gain information for each luminance of each subpixel constituting the plurality of display modules 110-1,..., 110-n.
- FIG. 7 is a diagram illustrating current gain information for each luminance of each subpixel according to an exemplary embodiment of the present invention.
- the current gain information for each subpixel of each subpixel may include a current gain value for each luminance of each subpixel that is calibrated based on the brightness and color characteristics of each subpixel according to an increase in current.
- the R / G / B LED device has different brightness increasing characteristics with increasing current.
- the R / G / B LED elements have different color coordinates due to different color coordinates as current increases.
- the red pixel maintains the same x and y coordinates as the current increases
- the green pixel slightly changes the x and y coordinates
- FIG. 9B it can be seen that the blue pixel is substantially changed in x and y coordinates as the current increases.
- the storage 130 has a luminance characteristic according to the current of the R / G / B LED element as shown in FIG. 7 and a color according to the current of the R / G / B LED element as shown in FIGS. 8A to 8C.
- the current gain value for each luminance of the R / G / B LED device calculated by reflecting the characteristic may be stored.
- the current gain information may include a current gain value divided into 2 8 steps based on 8 bit information, but is not limited thereto.
- the peak luminance levels corresponding to the maximum power amounts of 180W, 300W, 210W, and 150W of each of the first to fourth display modules 110-1 to 110-4 are determined as A, B, C, and D, respectively.
- a gain value of current flowing through each of the R / G / B LED elements may be applied based on the graph of FIG. 7. That is, according to the characteristics of the R / G / B LED elements in each of the current values a, b, c, and d for implementing the peak luminance levels of each of the first to fourth display modules 110-1 to 110-4.
- the final current value to which the current gain value is applied may be applied to the first to fourth display modules 110-1 to 110-4.
- gain values g r1 , g g1 and g b1 for driving the R / G / B LED elements of the first display module 110-1 are respectively applied to the corresponding current values a and the second display.
- Gain values g r2 , g g2 , and g b2 for driving the R / G / B LED elements of the module 110-2 are respectively applied to the corresponding current values b, and the third display module 110-3 is applied.
- Gain values g r3 , g g3 , g b3 for driving the R / G / B LED elements are respectively applied to corresponding current values c, and the R / G / B LED elements of the fourth display module 110-4 are applied.
- FIG. 9 is a diagram for describing a method of driving a display apparatus according to an exemplary embodiment.
- FIG. 9 illustrates a method of driving a display apparatus including a display including a plurality of display modules according to an exemplary embodiment.
- an individual power consumption amount of each of the plurality of display modules is calculated (S910).
- the maximum amount of power available to each of the plurality of display modules is calculated based on the total power capacity of the plurality of display modules and the individual power consumption of each of the plurality of display modules (S920).
- the total power capacity may be calculated by the sum of the rated power capacity of each of the plurality of display modules.
- a peak brightness level of each of the plurality of display modules is calculated based on the calculated maximum power amount (S930).
- each of the plurality of display modules has a corresponding peak luminance level (S940).
- the display apparatus may include current control information for each luminance of each subpixel that is calibrated based on luminance and color characteristics of each subpixel constituting the plurality of display modules.
- the current control information may include information including a current level value of each luminance of each subpixel that is calibrated based on luminance level information according to the current of each subpixel and color shift information corresponding to the current of each subpixel. Can be.
- the plurality of display modules may be driven such that each of the plurality of display modules has a corresponding peak luminance level based on the current control information stored in the storage.
- the storage may further store brightness level information for each power provided to the display module.
- the power increase amount of the remaining display modules is determined based on the power increase amount of the reference display module having the maximum power consumption among the power consumption amounts of each of the plurality of display modules.
- the peak luminance level of each display module may be calculated based on the maximum amount of power calculated for each display module.
- the storage may further store brightness level information for each power provided to the display module.
- the peak luminance level of each of the plurality of display modules may be calculated based on the maximum luminance level information for each power and the maximum amount of power available in each of the plurality of display modules. Can be.
- the current gain value for each sub-pixel corresponding to each of the plurality of display modules having the calculated peak luminance level is obtained from storage, and A plurality of display modules may be driven based on a current gain value for each subpixel.
- the storage may further store power information of each sub-pixel for each gray level of the image.
- each of the plurality of display modules is based on the grayscale value of the image displayed on each of the plurality of display modules and the power information of each subpixel for each grayscale. The amount of power consumption can be calculated.
- each of the plurality of display modules is implemented as an LED cabinet including a plurality of LED elements, and each subpixel is implemented as an R (Red) LED, a G (Green) LED, and a B (Blue) LED pixel. Can be.
- a peaking effect may be maximized through power sharing between the plurality of display modules when implementing peak luminance.
- the color shift phenomenon due to the increase of the current input to each sub-pixel can be prevented, the image quality of the image provided to the user can be improved.
- the above-described methods according to various embodiments of the present disclosure may be implemented by only upgrading the software / hardware of the existing unit display module and / or the display device composed of the unit display module.
- a non-transitory computer readable medium may be provided in which a program for sequentially performing the driving method according to the present invention is stored.
- the non-transitory readable medium refers to a medium that stores data semi-permanently and is readable by a device, not a medium storing data for a short time such as a register, a cache, a memory, and the like.
- a non-transitory readable medium such as a CD, a DVD, a hard disk, a Blu-ray disk, a USB, a memory card, a ROM, or the like.
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Abstract
Description
Claims (15)
- 복수의 디스플레이 모듈을 포함하는 디스플레이;상기 복수의 디스플레이 모듈 각각에 연결된 복수의 구동 모듈을 포함하는 디스플레이 구동부;디스플레이 소자의 휘도 별 전류 제어 정보를 저장하는 스토리지;및상기 복수의 구동 모듈에 의해 제공 가능한 전체 파워 용량 및 상기 복수의 디스플레이 모듈 각각의 개별 소비 파워량에 기초하여 상기 복수의 디스플레이 모듈 각각에서 이용 가능한 최대 파워량을 산출하고, 산출된 최대 파워량에 기초하여 상기 복수의 디스플레이 모듈 각각의 피크(peak) 휘도 레벨을 산출하고, 상기 전류 제어 정보에 기초하여 상기 복수의 디스플레이 모듈 각각이 대응되는 피크 휘도 레벨을 가지도록 상기 복수의 구동 모듈을 제어하는 프로세서;를 포함하는 디스플레이 장치.
- 제1항에 있어서,상기 전체 파워 용량은,상기 복수의 구동 모듈 각각에 의해 제공 가능한 정격 파워 용량의 합에 의해 산출되는, 디스플레이 장치.
- 제1항에 있어서,상기 프로세서는,상기 복수의 구동 모듈에 의해 제공 가능한 전체 파워 용량 및, 상기 복수의 디스플레이 모듈의 전체 소비 파워량 및 상기 복수의 디스플레이 모듈 각각의 개별 소비 파워량 간의 비율에 기초하여 상기 복수의 디스플레이 모듈 각각에서 이용 가능한 최대 파워량을 산출하는, 디스플레이 장치.
- 제1항에 있어서,상기 전류 제어 정보는,상기 복수의 디스플레이 모듈을 구성하는 각 서브 픽셀의 전류에 따른 휘도 및 색상 특성에 기초하여 캘리브레이션된 각 서브 픽셀의 휘도 별 전류 제어 정보를 포함하며,상기 프로세서는,상기 스토리지에 저장된 정보에 기초하여 상기 복수의 디스플레이 모듈 각각이 대응되는 피크 휘도 레벨을 가지도록 상기 복수의 구동 모듈을 제어하는, 디스플레이 장치.
- 제4항에 있어서,상기 스토리지에 저장된 전류 제어 정보는,각 서브 픽셀의 전류에 따른 휘도 레벨 정보 및 각 서브 픽셀의 전류에 따른 색상 쉬프트(shift) 정보에 기초하여 캘리브레이션된 상기 각 서브 픽셀의 휘도 별 전류 게인 값을 포함하는 정보인, 디스플레이 장치.
- 제1항에 있어서,상기 스토리지는,디스플레이 모듈에 제공되는 파워 별 휘도 레벨 정보를 더 저장하며,상기 프로세서는,상기 파워 별 최대 휘도 레벨 정보 및 상기 복수의 디스플레이 모듈 각각에서 이용 가능한 최대 파워량에 기초하여 상기 복수의 디스플레이 모듈 각각의 피크 휘도 레벨을 산출하는, 디스플레이 장치.
- 제6항에 있어서,상기 프로세서는,상기 복수의 디스플레이 모듈 각각이 상기 산출된 피크 휘도 레벨을 가지기 위한 상기 복수의 디스플레이 모듈 각각에 대응되는 상기 각 서브 픽셀 별 전류 게인 값을 상기 스토리지로부터 획득하고, 상기 획득된 상기 각 서브 픽셀 별 전류 게인 값에 기초하여 상기 복수의 구동 모듈 각각의 구동 상태를 제어하는, 디스플레이 장치.
- 제1항에 있어서,상기 스토리지는,영상의 계조 별 서브 픽셀 각각의 파워 정보를 더 저장하며,상기 프로세서는,상기 복수의 디스플레이 모듈 각각에 디스플레이되는 영상의 계조 값 및 상기 계조 별 서브 픽셀 각각의 파워 정보에 기초하여 상기 복수의 디스플레이 모듈 각각의 소비 파워량을 산출하는, 디스플레이 장치.
- 제1항에 있어서,상기 복수의 디스플레이 모듈 각각은,복수의 LED 소자를 포함하는 LED 캐비넷(cabinet)으로 구현되며,상기 각 서브 픽셀은, R(Red) LED, G(Green) LED, B(Blue) LED 픽셀인, 디스플레이 장치.
- 복수의 디스플레이 모듈로 구성된 디스플레이를 포함하는 디스플레이 장치의 구동 방법에 있어서,상기 복수의 디스플레이 모듈을 구동하는 복수의 구동 모듈에 의해 제공 가능한 전체 파워 용량 및 상기 복수의 디스플레이 모듈 각각의 개별 소비 파워량에 기초하여, 상기 복수의 디스플레이 모듈 각각에서 이용 가능한 최대 파워량을 산출하는 단계;상기 산출된 최대 파워량에 기초하여 상기 복수의 디스플레이 모듈 각각의 피크(peak) 휘도 레벨을 산출하고, 상기 복수의 디스플레이 모듈 각각이 대응되는 피크 휘도 레벨을 가지도록 상기 복수의 디스플레이 모듈을 구동하는 단계;를 포함하는 구동 방법.
- 제10항에 있어서,상기 전체 파워 용량은,상기 복수의 구동 모듈 각각에 의해 제공 가능한 정격 파워 용량의 합에 의해 산출되는, 구동 방법.
- 제10항에 있어서,상기 최대 파워량을 산출하는 단계는,상기 복수의 구동 모듈에 의해 제공 가능한 전체 파워 용량 및, 상기 복수의 디스플레이 모듈의 전체 소비 파워량 및 상기 복수의 디스플레이 모듈 각각의 개별 소비 파워량 간의 비율에 기초하여 상기 복수의 디스플레이 모듈 각각에서 이용 가능한 최대 파워량을 산출하는, 디스플레이 장치.
- 제10항에 있어서,상기 디스플레이 장치는,상기 복수의 디스플레이 모듈을 구성하는 각 서브 픽셀의 전류에 따른 휘도 및 색상 특성에 기초하여 캘리브레이션된 각 서브 픽셀의 휘도 별 전류 제어 정보를 포함하는 스토리지;를 더 포함하며,상기 복수의 디스플레이 모듈을 구동하는 단계는,상기 스토리지에 저장된 전류 제어 정보에 기초하여 상기 복수의 디스플레이 모듈 각각이 대응되는 피크 휘도 레벨을 가지도록 상기 복수의 디스플레이 모듈을 구동하는, 구동 방법.
- 제13항에 있어서,상기 스토리지에 저장된 전류 제어 정보는,각 서브 픽셀의 전류에 따른 휘도 레벨 정보 및 각 서브 픽셀의 전류에 따른 색상 쉬프트(shift) 정보에 기초하여 캘리브레이션된 상기 각 서브 픽셀의 휘도 별 전류 게인 값을 포함하는 정보인, 구동 방법.
- 제10항에 있어서,상기 스토리지는,디스플레이 모듈에 제공되는 파워 별 휘도 레벨 정보를 더 저장하며,상기 피크(peak) 휘도 레벨을 산출하는 단계는,상기 파워 별 최대 휘도 레벨 정보 및 상기 복수의 디스플레이 모듈 각각에서 이용 가능한 최대 파워량에 기초하여 상기 복수의 디스플레이 모듈 각각의 피크 휘도 레벨을 산출하는, 구동 방법.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17843758.8A EP3474263B1 (en) | 2016-08-26 | 2017-03-08 | Display device |
| CN201780052418.9A CN109643519B (zh) | 2016-08-26 | 2017-03-08 | 显示装置及其驱动方法 |
| JP2019504028A JP6751467B2 (ja) | 2016-08-26 | 2017-03-08 | ディスプレイ装置及びその駆動方法 |
| US16/325,117 US11521535B2 (en) | 2016-08-26 | 2017-03-08 | Display device and driving method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2016-0109484 | 2016-08-26 | ||
| KR1020160109484A KR102208872B1 (ko) | 2016-08-26 | 2016-08-26 | 디스플레이 장치 및 그 구동 방법 |
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| EP (1) | EP3474263B1 (ko) |
| JP (1) | JP6751467B2 (ko) |
| KR (1) | KR102208872B1 (ko) |
| CN (1) | CN109643519B (ko) |
| WO (1) | WO2018038338A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3644176A3 (en) * | 2018-10-22 | 2020-07-01 | Samsung Electronics Co., Ltd. | Display apparatus and controlling method thereof |
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| US9013367B2 (en) * | 2008-01-04 | 2015-04-21 | Nanolumens Acquisition Inc. | Flexible display |
| KR102208872B1 (ko) * | 2016-08-26 | 2021-01-28 | 삼성전자주식회사 | 디스플레이 장치 및 그 구동 방법 |
| WO2021241262A1 (ja) * | 2020-05-27 | 2021-12-02 | ソニーグループ株式会社 | 複合ディスプレイ装置、および、その制御方法 |
| JP2022019109A (ja) * | 2020-07-17 | 2022-01-27 | レノボ・シンガポール・プライベート・リミテッド | 電子機器、及び制御方法 |
| KR102823522B1 (ko) | 2020-08-19 | 2025-06-23 | 삼성전자주식회사 | 모듈러 디스플레이 장치 및 그 제어 방법 |
| WO2022087819A1 (zh) * | 2020-10-27 | 2022-05-05 | 京东方科技集团股份有限公司 | 拼接屏白平衡调整的方法和装置、电子设备、介质 |
| CN115762379A (zh) * | 2022-09-07 | 2023-03-07 | 联想(北京)有限公司 | 一种控制方法、装置及电子设备 |
| CN115424577B (zh) * | 2022-11-03 | 2023-01-13 | 永林电子股份有限公司 | 基于全彩智能控制器的led均匀发光控制方法及系统 |
| KR20240073449A (ko) * | 2022-11-18 | 2024-05-27 | 삼성전자주식회사 | 디스플레이 장치 및 그 구동 방법 |
| KR20240074520A (ko) * | 2022-11-21 | 2024-05-28 | 삼성전자주식회사 | 디스플레이 장치 및 그 구동 방법 |
| CN116246588A (zh) * | 2022-12-26 | 2023-06-09 | 深圳创维-Rgb电子有限公司 | 显示屏背光模组的功率调节方法、装置与显示设备 |
| US12368816B1 (en) * | 2023-08-29 | 2025-07-22 | Clinton Colt Atkinson | Ceiling-mounted replica jumbotron |
| KR102835638B1 (ko) * | 2023-10-20 | 2025-07-18 | 엘지전자 주식회사 | 디스플레이 장치 및 그의 전원 공유 방법 |
| WO2025234576A1 (ko) * | 2024-05-08 | 2025-11-13 | 삼성전자주식회사 | 전자 장치 및 그 제어 방법 |
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| US11049440B2 (en) | 2018-10-22 | 2021-06-29 | Samsung Electronics Co., Ltd. | Display apparatus and controlling method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US20210295760A1 (en) | 2021-09-23 |
| US11521535B2 (en) | 2022-12-06 |
| CN109643519A (zh) | 2019-04-16 |
| CN109643519B (zh) | 2022-11-04 |
| JP2019523452A (ja) | 2019-08-22 |
| KR20180023705A (ko) | 2018-03-07 |
| EP3474263B1 (en) | 2025-04-30 |
| KR102208872B1 (ko) | 2021-01-28 |
| EP3474263A4 (en) | 2019-07-03 |
| JP6751467B2 (ja) | 2020-09-02 |
| EP3474263A1 (en) | 2019-04-24 |
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