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WO2015111945A1 - Procede de commande de la puissance d'un dispositif d'affichage sur papier electronique, et dispositif d'affichage sur papier electronique utilisant ce procede - Google Patents

Procede de commande de la puissance d'un dispositif d'affichage sur papier electronique, et dispositif d'affichage sur papier electronique utilisant ce procede Download PDF

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Publication number
WO2015111945A1
WO2015111945A1 PCT/KR2015/000705 KR2015000705W WO2015111945A1 WO 2015111945 A1 WO2015111945 A1 WO 2015111945A1 KR 2015000705 W KR2015000705 W KR 2015000705W WO 2015111945 A1 WO2015111945 A1 WO 2015111945A1
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WIPO (PCT)
Prior art keywords
main processor
power
image update
switch
module
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Ceased
Application number
PCT/KR2015/000705
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English (en)
Korean (ko)
Inventor
마병인
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MEDIAEVERCO LTD
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MEDIAEVERCO LTD
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Publication of WO2015111945A1 publication Critical patent/WO2015111945A1/fr
Anticipated expiration legal-status Critical
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    • 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
    • G09G3/34—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0435—Change or adaptation of the frame rate of the video stream
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/14—Electronic books and readers

Definitions

  • An embodiment according to the concept of the present invention relates to an electronic paper display (EPD), and more particularly, based on the driving and standby power of the main processor and the module driving driver calculated according to various image update times.
  • the present invention relates to a power control method for an electronic paper display device capable of minimizing power consumption and an electronic paper display device using the same.
  • Electronic paper is also called e-paper as a display technology that applies the characteristics of general ink.
  • the display device for electronic paper is a display device that can be used as if it is a real paper, and reflects light like a general paper unlike a conventional flat panel display that uses a back light to shine a pixel.
  • a display device using an electronic paper has a relatively low power consumption compared to a device using a backlight power source such as an LCD device, and thus is widely used for a portable e-book such as an e-book reader.
  • the display device for the conventional electronic paper has a limitation in the long-term use because the driving circuit or components constituting the device are always in the standby state.
  • an e-book reader as a display device using electronic paper has to recreate hundreds of screens per hour according to the reading speed of a person, and about 10,000 pages can be viewed using the built-in power supply. Therefore, about a week can be used without a charge, but after a week it was necessary to charge. Although the period of use may be longer than that of the LCD device, it is a considerably short period of use for a memorial park image device for a purpose such as a picture frame containing an actual picture. The display device for the electronic paper for this purpose should be guaranteed a much longer period of use than this, and the user wants an image viewing device that can be used for months to years with a single charge.
  • the technical problem to be solved by the present invention is the power consumption by changing the mode of the main processor or switching off the module driver based on the driving and standby power of the main processor and the module driver driver calculated according to various image update time It is to provide a power control method for an electronic paper display device that can minimize the.
  • Another technical problem to be solved by the present invention is to provide an electronic paper display device capable of minimizing power consumption according to the driving and standby power of the main processor and the module driving driver calculated according to various image update times.
  • a power control method for an electronic paper display device the method in which a main processor compares standby power of a module driving driver with a first threshold value for an image update period, and compares the first threshold value with the first threshold value. According to a comparison result, controlling the power of the module driver by controlling the on / off of a switch supplying power from the battery power source to the module driver and if the switch is turned off, the main processor Comparing the standby power and the second threshold value of the main processor with respect to the image update period and the main processor determining a mode of the main processor according to a result of the comparison with the second threshold value. Controlling the power of the main processor and the standby mode In the mode, the main processor includes transmitting an image update signal to the module driver and updating the image in response to the transmitted image update signal.
  • controlling of the power of the module driving driver may include: turning off the switch by the main processor when the standby power of the module driving driver is greater than the first threshold value; After counting may include the step of turning on the switch.
  • the first threshold value may be power consumed when the module driving driver boots.
  • the controlling of the power of the main processor may include switching the main processor from a standby mode to a power saving mode when the standby power of the main processor is greater than the second threshold and updating the image by the main processor. Turning on the switch after counting the period and switching the main processor from the power saving mode to the standby mode.
  • the second threshold may be power consumed when the main processor boots.
  • the electronic paper display device transmits each of the plurality of images to the electronic paper module in response to the transmitted image update signal and the electronic paper module for displaying the plurality of transmitted images on the electronic paper.
  • the image update signal is generated and transmitted to the module driver according to a corresponding image update period among a plurality of image update periods.
  • the standby after counting the corresponding image update period. It includes a main processor for switching to a mode, the module driver and the battery power supply for supplying power to the main processor, and a switch connecting the battery power supply and the module driver.
  • the main processor turns off the switch when the standby state power of the module driving driver according to the corresponding image update period is greater than a first threshold value, turns on the switch after counting the corresponding image update period.
  • An image update signal may be generated.
  • the main processor may switch from the standby mode to the power saving mode when the power consumption of the standby mode according to the corresponding image update period is greater than a second threshold.
  • the electronic paper display apparatus may further include a user interface for receiving each of the plurality of image update periods from a user.
  • the user interface may be implemented as a remote control receiver capable of receiving a wireless wake-up signal from a user for forcibly switching the main processor from a power saving mode to a standby mode.
  • the power control method for an electronic paper display device and the electronic paper display device using the same compare the power consumption of the main processor and the module driving driver according to various image update times with a predetermined threshold.
  • the power consumption of the display device can be minimized by changing the mode of the main processor or by switching off the module driving driver.
  • FIG 1 is an internal block diagram of an electronic paper display device according to an embodiment of the present invention.
  • FIG. 2 is a timing diagram illustrating a method in which the main processor illustrated in FIG. 1 controls power consumption of a display device.
  • FIG. 3 is a flowchart illustrating a power control method of an electronic paper display device according to an embodiment of the present invention.
  • first or second may be used to describe various components, but the components should not be limited by the terms. The terms are only for the purpose of distinguishing one component from another, for example, without departing from the scope of the rights according to the inventive concept, the first component may be named a second component, and similarly The second component may also be referred to as the first component.
  • FIG. 1 is an internal block diagram of an electronic paper display device (hereinafter referred to as a "display device") according to an embodiment of the present invention.
  • the display apparatus 100 includes an electronic paper module 200, a module driving driver 300, a main processor 400, a switch 500, and a battery power supply 600.
  • the electronic paper module 200 includes an electronic paper (E-paper) having a structure in which a conductive electrode layer, an electronic ink layer, and a transparent insulating layer are sequentially stacked, or a structure in which the conductive electrode layer and the electronic ink layer are sequentially stacked. It serves to display the images (eg, img_1 to img_n) transmitted from the 300 at predetermined time intervals (eg, ⁇ ta, ⁇ tb, and ⁇ tc) on the electronic paper.
  • E-paper electronic paper having a structure in which a conductive electrode layer, an electronic ink layer, and a transparent insulating layer are sequentially stacked, or a structure in which the conductive electrode layer and the electronic ink layer are sequentially stacked. It serves to display the images (eg, img_1 to img_n) transmitted from the 300 at predetermined time intervals (eg, ⁇ ta, ⁇ tb, and ⁇ tc) on the electronic paper.
  • the predetermined time intervals ⁇ ta, ⁇ tb, and ⁇ tc are image update periods, and mean an elapsed time required to update each of the images img_1 to img_n.
  • the electronic paper module 200 displays the first image img_1 on the e-paper, and then ⁇ ta (or ⁇ tb). If ⁇ tc has elapsed and the second image img_2 is transmitted, the image is updated by displaying the second image img_2 on the E-paper.
  • the e-paper included in the electronic paper module 200 displays the images (eg, img_1 or img_2), and then continuously displays the displayed image (img_1 or img_2) even when the power supply is cut off.
  • the images eg, img_1 or img_2
  • the displayed image img_1 or img_2
  • the module driving driver 300 controls the display operation (eg, update operation) of the electronic paper module 200, and the electronic paper module 200 according to the image update signal update_img transmitted from the main processor 400.
  • Each of the plurality of images eg, img_1 to img_n
  • is transmitted at predetermined time intervals eg, ⁇ ta, ⁇ tb, and ⁇ tc).
  • the module driving driver 300 may include a first memory MEM1, and may store a plurality of images img_1 to img_n for transmission to the electronic paper module 200 in the first memory MEM1. have.
  • the main processor 400 generates an image update signal update_img according to predetermined image update periods ⁇ ta, ⁇ tb and ⁇ tc and transmits the image update signal update_img to the module driver 300 to update the image of the module driver 300.
  • an image update signal update_img according to predetermined image update periods ⁇ ta, ⁇ tb and ⁇ tc and transmits the image update signal update_img to the module driver 300 to update the image of the module driver 300.
  • the main processor 400 may include a second memory MEM2 capable of storing time tables for the image update periods ⁇ ta, ⁇ tb, and ⁇ tc.
  • the main processor 400 refers to the time table stored in the second memory MEM2 and updates the module driving driver 300 to update each of the plurality of images img_1 to img_n every time the first time ⁇ ta elapses. After updating all of the plurality of images img_1 to img_n according to the first period DELTA ta, the second period DELTA tb is a time longer than the first period DELTA ta. Each time, the plurality of images img_1 to img_n are updated.
  • the main processor 400 After the main processor 400 updates all of the plurality of images img_1 to img_n according to the second period DELTA tb, the main processor 400 sequentially has a relatively longer time than the second period DELTA tb.
  • Each of three images ⁇ tc may be controlled to update the plurality of images img_1 to img_n again.
  • the main processor 400 may transmit an image update signal update_img to the module driving driver 300 according to the image update periods ⁇ ta, ⁇ tb, and ⁇ tc, and the image update periods ⁇ ta,
  • the modes (mode_normal and mode_sleep) of the main processor 400 are changed by comparing the power consumption amounts of the main processor 400 and the module driving driver 300 according to ⁇ tb and ⁇ tc with predetermined thresholds th_1 and th_2.
  • the power consumption of the display apparatus 100 may be efficiently controlled by turning on / off the switch 500.
  • the battery power supply unit 600 supplies power to the main processor 400 and the module driving driver 300, and supplies power to the main processor 400 through the DC / DC converter 630. To supply.
  • the battery power supply unit 600 supplies power to the module driving driver 300 through the switch 500 that is turned on / off under the control of the main processor 400.
  • the display apparatus 100 further includes a user interface 450 that can receive a user input signal for booting or mode switching of the main processor 400 and the module driving driver 300.
  • the user interface 450 may be implemented as a remote control receiver capable of receiving a remote wireless signal.
  • the remote control receiver may transmit a wake-up signal WS to the main processor 400 to convert the main processor 400 from the power saving mode (mode_sleep) to the standby mode (mode_normal) according to the received wireless signal. .
  • the user interface 450 may directly receive the image update periods ⁇ ta, ⁇ tb, and ⁇ tc from a user, and store the image update periods ⁇ ta, ⁇ tb, and ⁇ tc in a second table MEM_2 in a time table format.
  • FIG. 2 is a timing diagram illustrating a method of controlling the power consumption of the display apparatus 10 by the main processor 400 illustrated in FIG. 1.
  • FIG. 2A illustrates power consumption of the main processor 400
  • FIG. 2B illustrates power consumption of the module driving driver 300
  • FIG. 2C illustrates the switch 500.
  • (d) shows a mode state of the main processor 400.
  • FIG. 2 illustrates an example of updating one image for each of a plurality of image update periods ⁇ ta, ⁇ tb, and ⁇ tc.
  • the main processor 400 and the module driver 300 of the display apparatus 100 are booted, and the module driver 300 may transmit an image update signal (sent from the main processor 400).
  • the first image img_1 is updated with the electronic paper module 200 according to update_img).
  • the power consumed when booting the main processor 400 is Pa_1
  • the power consumed when booting the module driving driver 300 is Pb_1
  • the power required to transmit the image update signal update_img of the main processor 400 is Pa_2
  • the power consumed by the module driver 300 to update the first image img_1 to the electronic paper module 200 according to the transmitted image update signal update_img is Pb_2.
  • the power consumed in the standby mode (mode_normal) of the main processor 400 after booting is Pa_3
  • the power consumed in the power saving mode (mode_sleep) of the main processor 400 is Pa_4
  • the module driving driver 300 Power consumed in the idle state (idle_state) is Pb_3.
  • the power Pa_3 consumed in the standby mode (mode_normal) of the main processor 400 and the power Pb_3 consumed during the idle state (idle_state) of the module driving driver 300 are image update periods ⁇ ta and ⁇ tb. And ⁇ tc).
  • the main processor 400 calculates power consumption Pa_3 of the main processor 400 and power consumption Pb_3 of the module driving driver 300 according to the image update periods ⁇ ta, ⁇ tb, and ⁇ tc.
  • the power consumption of the display apparatus 100 is efficiently controlled.
  • the main processor 400 waits for the idle state of the module driving driver 300 during the first period ⁇ ta which is a time for updating the second image img_2.
  • the power consumption of the display apparatus 100 is controlled by comparing the power consumption Pb_3 with the first threshold th_1 to turn on / off the switch 500.
  • the first threshold value th_1 may be power Pb_1 consumed when the module driver 300 boots.
  • the main processor 400 may switch 500. Keep) on.
  • each of the plurality of images img_1 to img_n is sequentially updated (ie, displayed) in the electronic paper module 200 at every first period ⁇ ta. do.
  • the main processor 400 refers to the time table of the second memory MEM_2 to determine the second period ( The plurality of images img_1 to img_n are updated again according to ⁇ tb).
  • the main processor 400 determines whether the power Pb_3 (indicated by a dotted line) consumed by the module driver 300 during the second period ⁇ tb is greater than the first threshold th_1, the main processor 400
  • the switch 500 turns off the switch 500 to cut off power supplied from the battery power source 600 to the module driving driver 300.
  • the main processor 400 when the switch 500 is turned off, the main processor 400 includes the power Pa_3 and the second consumed by the main processor 400 in the standby mode (mode_normal) during the second period ⁇ tb.
  • the threshold value th_2 may be compared to select whether to keep or switch its modes (mode_normal and mode_sleep).
  • the second threshold th_2 may be power Pa_1 consumed when the main processor 400 boots.
  • the main processor 400 may enter the standby mode mode_normal. If the power consumption Pa_3 is smaller than the second threshold th_2, the main processor 400 maintains the standby mode (mode_normal) and turns on / off the switch 500. The task updates the plurality of images img_1 to img_n.
  • the power Pb_3 consumed by the module driver 300 in the standby state id_state is greater than the first threshold th_1, and the power Pa_3 consumed by the main processor 400 in the standby mode mode_normal. If the value is smaller than the second threshold th_2, the main processor 400 turns off the switch 500 to remove the power Pb_3 consumed by the module driving driver 300, and the second period?
  • the module driving driver 300 is booted by counting tb) and turning on the switch 500 immediately before the second period ⁇ tb passes.
  • the main processor 400 updates the first image img_1 by transmitting an image update signal update_img to the module driving driver 300, updates the first image img_1, and then switches the switch 500 again. Turn off
  • the image update process for each second period ⁇ tb of the second image img_2 to the nth image img_n is as described above.
  • the main processor 400 may control the on / off of the switch 500.
  • the plurality of images img_1 to img_n are updated again according to the third period ⁇ tc with reference to the time table of the two memories MEM_2.
  • the power consumed by the module driver 300 in the standby state id_state Pb_3 is greater than the first threshold th_1, and the main processor 400 consumes the standby mode mode_normal. If the power Pa_3 (indicated by the dotted line) is also greater than the second threshold th_2, the main processor 400 turns off the switch 500 and switches from the standby mode (mode_normal) to the power saving mode (mode_sleep). .
  • the main processor 400 turns off the switch 500 to remove the power Pb_3 consumed by the module driving driver 300, and switches itself to the power saving mode (mode_sleep) to display the display device 100. Minimize power consumption.
  • the power saving mode (mode_sleep) is a mode that consumes only the minimum power Pa_4 necessary for counting the image update periods ⁇ ta, ⁇ tb, and ⁇ tc. little.
  • the main processor 400 counts the third period ⁇ tc, switches from the power saving mode (mode_sleep) to the standby mode (mode_normal) just before the third period ⁇ tc passes, and boots, and then switches the switch 500 again. Turn on (on) to receive power from the battery power source 600 to boot the module driving driver (300).
  • the main processor 400 updates the first image img_1 by transmitting an image update signal update_img to the module driving driver 300, turns off the switch 500, and reactivates itself. mode_sleep).
  • the image update process for each third period ⁇ tc of the second image img_2 to the nth image img_n is the same as above.
  • FIG. 3 is a flowchart illustrating a method of controlling power consumption of the display apparatus 100 according to an exemplary embodiment.
  • the main processor 400 transmits an image update signal update_img to the module driver 300 (S100), and the module driver 300 transmits the transmitted image update signal update_img.
  • the electronic paper module 200 In response to the electronic paper module 200 to update the image (eg, img1) (S200).
  • the main processor 400 After the image (e.g., img_1) is updated in the electronic paper module 200, the main processor 400 performs a time (any one of? Ta,? Tb, and? Tc) for updating the next image (e.g., img_2).
  • the power Pb_3 consumed during the idle state idle_state of the module driving driver 300 is compared with the first threshold value th_1 (S300).
  • step S300 when the power consumption Pb_3 for the idle state idle_state of the module driving driver 300 is smaller than the first threshold th_1, the main processor 400 turns on the switch 500.
  • the image update signal update_img is transmitted to the module driving driver 300 (S100).
  • the module driving driver 300 updates the second image img_2 with the electronic paper module 200 in response to the image update signal update_img transmitted from the main processor 400 (S200).
  • the main processor 400 since the main processor 400 updates the plurality of images img_1 to img_n in order according to a specific image update period (eg, ⁇ ta), the steps S100 and S200 may be repeated.
  • a specific image update period eg, ⁇ ta
  • the main processor 400 turns off the switch 500.
  • the power consumption Pa_3 in the standby mode (mode_normal) of the main processor 400 is compared with the second threshold value th_2 (S500).
  • step S500 when the power consumption Pa_3 of the main processor 400 in the standby mode (mode_normal) is less than the second threshold th_2, the main processor 400 may enter the standby mode (mode_normal). ) As it is, and counts a specific image update period (eg, ⁇ tb) to turn on the switch 500 again just before the image update period (eg, ⁇ tb) elapses (S600).
  • a specific image update period eg, ⁇ tb
  • the module driver 300 reboots, and the main processor 400 sends an image update signal update_img to the module driver 300.
  • the module driving driver 300 updates the second image img_2 in operation S200.
  • the main processor 400 turns off the switch 500 again (S400).
  • the main processor 400 updates the plurality of images img_1 to img_n in order according to a specific image update period (eg, ⁇ tb), so that the steps S100 to S600 may be repeated.
  • a specific image update period eg, ⁇ tb
  • the main processor 400 saves power in the standby mode (mode_normal). Switch to the mode (mode_sleep) (S700).
  • the main processor 400 counts a specific image update period (eg, ⁇ tc) to switch back to the standby mode (mode_normal) just before the specific image update period (eg, ⁇ tc) elapses (S800).
  • the switch 500 is turned on (S900).
  • the module driver 300 reboots, and the main processor 400 sends an image update signal to the module driver 300.
  • (update_img) is transmitted (S100), and the module driver 300 updates the second image (img_2) (S200).
  • the main processor 400 turns off the switch 500 again (S400), and switches itself to the power saving mode (mode_sleep). (S700).
  • the main processor 400 updates the plurality of images img_1 to img_n in order according to a specific image update period (eg, ⁇ tc), and thus the steps S100 to S500 and S700 to S900 are repeated.
  • a specific image update period eg, ⁇ tc
  • the power control method and the display apparatus using the same consumes the main processor 400 and the module driving driver 300 according to predetermined image update periods ⁇ ta, ⁇ tb, and ⁇ tc.
  • the power of the display apparatus 100 may be changed by changing the modes (mode_normal and mode_sleep) of the main processor 400 or by turning on / off the switch 500. There is an effect that can effectively control the consumption.
  • the present invention relates to a power control method for an electronic paper display device and has industrial applicability.

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

Abstract

L'invention concerne un procédé de commande de puissance, qui consiste à : faire comparer, par un processeur principal, la puissance en veille d'un pilote de commande de module à une première valeur de seuil pour une période de mise à jour d'image ; faire commander, par le processeur principal, la puissance du pilote de commande de module par une commande de mise en marche/d'arrêt d'un commutateur alimentant le pilote de commande de module à partir d'une source d'alimentation par batterie, selon le résultat de la comparaison avec la première valeur de seuil ; faire comparer, par le processeur principal, la puissance en veille du processeur principal à une deuxième valeur de seuil pour la période de mise à jour d'image quand le commutateur est éteint ; faire commander, par le processeur principal, la puissance du processeur principal en déterminant le mode du processeur principal selon le résultat de la comparaison avec la deuxième valeur de seuil ; faire transmettre, par le processeur principal, un signal de mise à jour d'image au pilote de commande de module quand le processeur principal est en mode de veille ; et faire mettre à jour une image par le pilote de commande de module, en réponse au signal de mise à jour d'image transmis.
PCT/KR2015/000705 2014-01-23 2015-01-23 Procede de commande de la puissance d'un dispositif d'affichage sur papier electronique, et dispositif d'affichage sur papier electronique utilisant ce procede Ceased WO2015111945A1 (fr)

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KR10-2014-0008169 2014-01-23
KR1020140008169A KR101544438B1 (ko) 2014-01-23 2014-01-23 전자종이 디스플레이 장치를 위한 전력 제어 방법 및 이를 이용한 전자종이 디스플레이 장치

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CN109754755A (zh) * 2017-11-07 2019-05-14 上海和辉光电有限公司 一种显示面板的供电方法、装置及显示设备

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