WO2021128488A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2021128488A1
WO2021128488A1 PCT/CN2020/071095 CN2020071095W WO2021128488A1 WO 2021128488 A1 WO2021128488 A1 WO 2021128488A1 CN 2020071095 W CN2020071095 W CN 2020071095W WO 2021128488 A1 WO2021128488 A1 WO 2021128488A1
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WO
WIPO (PCT)
Prior art keywords
source driver
unit
picture
display area
grayscale
Prior art date
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Ceased
Application number
PCT/CN2020/071095
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English (en)
French (fr)
Inventor
肖光星
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TCL China Star Optoelectronics Technology Co Ltd
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TCL China Star Optoelectronics Technology Co Ltd
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Priority to US16/640,742 priority Critical patent/US20220319394A1/en
Publication of WO2021128488A1 publication Critical patent/WO2021128488A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G3/2096—Details of the interface to the display terminal specific for a flat panel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • 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
    • 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
    • G09G2330/04—Display protection
    • G09G2330/045—Protection against panel overheating

Definitions

  • This application relates to the field of display driving technology, and in particular to a display device and a driving method thereof.
  • the embodiments of the present application provide a display device and a driving method thereof, so as to solve the problem that the existing display device has a heavy-duty picture when displaying a picture.
  • the data voltage will frequently be between a high level and a low level.
  • the ground switching causes the source driver chip to be under a high load, which in turn causes the temperature of the driver chip to rise, thereby affecting the technical problem of the performance of the driver chip.
  • An embodiment of the application provides a display device, including: a display panel, at least one source driver connected to the display panel, a gamma register connected to the source driver, and a PMIC connected to the gamma register ( Power Management IC, a power management integrated circuit) chip, and a timing controller; the first output terminal of the timing controller is connected to the source driver, and the second output terminal of the timing controller is connected to the PMIC chip
  • Each of the source drivers is connected to a plurality of data lines of the display panel, and each of the source drivers controls driving data of the display area where the plurality of data lines connected to it are located; wherein, the timing control The device includes a video data rearrangement unit, a grayscale statistical unit connected to the video data rearrangement unit, a judgment unit connected to the grayscale statistical unit, and a processing unit connected to the judgment unit; the video data The rearrangement unit is used to rearrange the received video data; the gray-scale statistics unit is used to count the number of gray-scales and the number of gray-scale
  • the frequency of high and low grayscale jumps in the display area controlled by the source driver is used for judging whether there is a reloaded picture in the video data; the processing unit is used for adjusting the gamma when the current picture is a reloaded picture Voltage; the gray-scale statistical unit includes a gray-scale histogram statistical unit and a frequency detection unit; the gray-scale histogram statistical unit is used to count each gray in each frame of the display area controlled by the source driver The frequency detection unit is used to count the total number of high and low grayscale transitions in the display area controlled by each source driver in each frame of the screen; the source driver includes a source driver chip and There are multiple output wires, and the multiple output wires are connected to the multiple data wires in a one-to-one correspondence.
  • the third output terminal of the timing controller is connected to the gamma register.
  • a storage library is provided in the PMIC chip, and the storage library is used to store the set gamma parameters.
  • An embodiment of the application provides another display device, including: a display panel, at least one source driver connected to the display panel, a gamma register connected to the source driver, and a PMIC connected to the gamma register (Power Management IC, power management integrated circuit) chip and a timing controller; the first output terminal of the timing controller is connected to the source driver, and the second output terminal of the timing controller is connected to the PMIC chip Connection; each of the source drivers is connected to a plurality of data lines of the display panel, and each of the source drivers controls the driving data of the display area where the plurality of data lines connected to it are located; wherein, the timing The controller includes a video data rearrangement unit, a grayscale statistical unit connected to the video data rearrangement unit, a judgment unit connected to the grayscale statistical unit, and a processing unit connected to the judgment unit; the video The data rearrangement unit is used to rearrange the received video data; the gray scale statistics unit is used to count the number of gray scales and the respective gray scales in the display area controlled by each
  • the frequency of high and low gray scale jumps in the display area controlled by the source driver; the judging unit is used to judge whether there is a reloaded picture in the video data; the processing unit is used to adjust the current picture when the current picture is a reloaded picture Horse voltage.
  • the grayscale statistics unit includes a grayscale histogram statistics unit and a frequency detection unit; the grayscale histogram statistics unit is used to count each of the sources in each frame The number of gray levels in the display area controlled by the driver; the frequency detection unit is used to count the total number of high and low gray level transitions in each frame of the display area controlled by the source driver.
  • the third output terminal of the timing controller is connected to the gamma register.
  • a storage library is provided in the PMIC chip, and the storage library is used to store the set gamma parameters.
  • the source driver includes a source driver chip and a plurality of output wires, and the plurality of output wires are connected to the plurality of data wires in a one-to-one correspondence.
  • the present application also provides a driving method of the above-mentioned display device, including:
  • S20 Count the grayscale histograms of the display areas controlled by each source driver and the frequency of high and low grayscale jumps in the display areas controlled by each source driver in each frame of picture;
  • S50 Output a gamma voltage to the source driver.
  • the method for calculating the grayscale histogram includes: counting the appearance of each grayscale in the display area controlled by each source driver in each frame of the picture. quantity.
  • the method for counting the frequency of the high and low gray scale jumps of the data line includes:
  • the method of judging whether the video data has a reload image includes:
  • the driving data of the overload area is obtained according to the grayscale histogram corresponding to the overload area;
  • the gamma register is reconfigured according to the driving data of the reload area, thereby changing the gamma voltage output by the gamma register.
  • the video data is rearranged, and the frequency of high and low grayscale jumps of the data lines driven by different source drivers is detected to determine each Whether there is a reload image in the display area corresponding to each source driver, so as to change the gamma voltage of the reload image, thereby reducing the temperature of the source driver chip.
  • FIG. 1 is a schematic diagram of a display device provided by an embodiment of the application.
  • FIG. 2 is a flowchart of steps of a driving method of a display device provided by an embodiment of the application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, “multiple” means two or more than two, unless otherwise specifically defined.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be mechanically connected, or electrically connected or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction of two components relationship.
  • connection should be understood according to specific circumstances.
  • the "above” or “below” of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them.
  • “above”, “above” and “above” the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than that of the second feature.
  • the “below”, “below” and “below” the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
  • an embodiment of the present application provides a display device 100.
  • the display device 100 shown includes a display panel 10, at least one source driver 20, a gamma register 30, and a PMIC (Power Management IC (power management integrated circuit) chip 40, and timing controller 50.
  • PMIC Power Management IC
  • the two source drivers 20 are used as an example for illustration, but it is not limited thereto.
  • the source driver 20 is connected to the display panel 10, each of the source drivers 20 is connected to a plurality of data lines of the display panel 10, and each of the source drivers 20 is used to transmit data to the display panel 10.
  • the data lines in the data line are loaded with a data voltage, that is, each source driver 20 controls the driving data of the display area where the multiple data lines connected to it are located, so as to charge the sub-pixels in the display area.
  • the source driver 20 is connected to the gamma register 30.
  • the gamma register 30 stores the corresponding relationship between the image brightness and the gray levels included in all gray-level corresponding points, and the gamma register 30 is used to The gamma voltage is output to the source driver 20.
  • the PMIC chip 40 is connected to the gamma register 30, and the PMIC chip is used to provide power.
  • a gamma register 30 is arranged between the PMIC chip 40 and the gamma register 30, which can control the output voltage delivered by the PMIC chip 40 to the source driver 20, facing the display panel 10
  • the loaded driving voltage is gamma corrected to make the brightness display reach the best.
  • the first output terminal of the timing controller 50 is connected to the PMIC chip 40, the second output terminal of the timing controller is connected to the source driver 20, and the timing controller 50 is used to provide the PMIC
  • the chip 40 sends out a voltage control signal, and the timing controller 50 is used to send a drive control signal to the source driver.
  • the embodiment of the present application controls the timing
  • the internal framework of the device is improved, so that the timing controller can adjust the corresponding gamma voltage when judging that the video data has a reloaded picture, so as to reduce the temperature of the source driver.
  • the timing controller 50 in the embodiment of the present application includes a video data rearrangement unit 51, a grayscale statistical unit 52 connected to the video data rearrangement unit 51, and a judgment that is connected to the grayscale statistical unit Unit 53, a processing unit 54 connected to the judgment unit.
  • the video data rearrangement unit 51 is used to rearrange the received video data.
  • the gray scale statistics unit 52 is used to count the gray scale histograms of the display areas controlled by the source drivers 20 and the high and low gray scale jumps in the display areas controlled by the source drivers 20 in each frame of the picture. Frequency of change
  • the judging unit 53 is used to judge whether there is a reloaded picture in the video data
  • the processing unit 54 is used to adjust the gamma voltage when the current picture is a reload picture.
  • the gray scale statistics unit 52 may include a gray scale histogram statistics unit 521 and a frequency detection unit 522.
  • the grayscale histogram statistics unit 521 is used to count the number of grayscales in the display area controlled by each source driver 20 in each frame, that is, the abscissa of the grayscale statistical histogram is each grayscale value. , The ordinate is the number of times the gray scale appears.
  • the frequency detection unit 522 is used to count the total number of high and low grayscale transitions in the display area controlled by each source driver 20 in each frame.
  • the judging unit 53 judges whether the video data has a reload image according to the gray scale display status of the display area controlled by each source driver 20 counted by the gray scale statistical unit 52.
  • the processing unit 54 can adjust the gamma voltage corresponding to the heavy load picture by controlling the output voltage of the PMIC chip 40.
  • the PMIC chip 40 may include a bank 41 for storing set gamma parameters, and the bank 41 is set with a set of gamma parameters, namely bank A and bank B, bank A. And bank B respectively correspond to one of high voltage and low voltage, the memory bank 41 includes a first control pin and a second control pin, the first control pin corresponds to bank A, and the second control pin corresponds to bank B.
  • the gamma voltage output by the gamma register 30 can be changed by changing the switch connection of the gamma register 30 between the first control pin and the second control pin.
  • the third output terminal of the timing controller may be connected to the gamma register 30, and the gamma register 30 may be configured in real time by the timing controller, thereby changing the gamma output of the gamma register 30. Horse voltage.
  • the source driver includes a source driver chip and a plurality of output wires, each output wire corresponds to an output terminal of the source driver, and the plurality of output wires corresponds to a plurality of the data lines one-to-one connection.
  • the PMIC chip 40 is also connected to the display panel 10 to provide a power supply voltage for the display panel 10.
  • the driving method of the display device 100 includes:
  • S20 Count the grayscale histogram of the display area controlled by each source driver 20 and the frequency of high and low grayscale jumps in the display area controlled by each source driver 20 in each frame of picture;
  • S50 Output a gamma voltage to the source driver.
  • the video data is automatically rearranged by the video data rearrangement unit, and the data is rearranged according to the display data corresponding to each data line, so as to facilitate subsequent statistics on the occurrence of high and low gray levels in each frame of each data line The number of jumps.
  • the grayscale histogram statistics can be completed by the grayscale histogram statistics unit 521.
  • the grayscale histogram statistics unit 521 receives the rearranged video data to count the number of grayscales in each frame of the display area controlled by each source driver 20, so as to facilitate subsequent locking of high and low gray levels. The position of the step jump.
  • the frequency statistics of the high and low grayscale transitions of the data line can be completed by the frequency detection unit 522. Firstly, count the number of high and low gray-scale transitions of each data line in the display area controlled by each source driver 20 in each frame; then, the same source driver 20 corresponding to the same source driver 20 in each frame is counted. The total number of high and low grayscale transitions of each of the data lines is added to obtain the total number of high and low grayscale transitions in the display area controlled by the source driver 20.
  • the method for judging whether there is a reloaded picture in the video data includes:
  • the source driver 20 controls The display area is a heavy load area, and the picture is determined to be a heavy load picture; otherwise, the picture is determined to be a light load picture.
  • the standards need to be specifically set according to the actual display panel. For example, a data line jumps from the current gray level to the next gray level, and the difference between the driving voltage corresponding to the current gray level and the driving voltage corresponding to the next gray level exceeds the set threshold, then it is judged that the jump becomes a high or low gray level jump. change.
  • Another example is an 8bit display panel. It is assumed that the low gray scale is 0 to 128 gray scales, and the high gray scale is 129 gray scales to 255 gray scales.
  • a data line jumps from the current gray scale to the next gray scale, if the current The gray scale and the next gray scale are respectively one of the low gray scale and the high gray scale, and it is judged that the transition is a high-low gray scale transition.
  • the source driver 20 In a frame of picture, if there is at least one display area controlled by the source driver 20, the total number of times of high and low grayscale transitions exceeds the corresponding preset value, then adjust the gamma voltage corresponding to the frame of picture, If it is not exceeded, the gamma voltage will be output according to the default setting value.
  • the preset value is a parameter value preset in the timing controller, and the preset value needs to be defined in conjunction with a specific display panel structure, so there is no limitation here.
  • the processing unit 54 of the timing controller 50 can control the PMIC chip 40 to switch the first control pin or the second control pin in the memory bank 41 to adjust the gamma voltage output in the gamma register 30.
  • the processing unit 54 of the timing controller 50 controls the gamma register 30 in real time to change the gamma voltage.
  • the principle of real-time control of the gamma register 30 by the processing unit 54 of the timing controller 50 includes: obtaining the driving data of the reload area according to the grayscale histogram corresponding to the reload area; The driving data of the reload area reconfigures the gamma register 30, thereby changing the gamma voltage output by the gamma register 30, thereby reducing the temperature of the source driver 20.
  • the video data is rearranged, and the frequency of high and low grayscale jumps of the data lines driven by different source drivers is detected to determine each Whether there is a reload image in the display area corresponding to each source driver, so as to change the gamma voltage of the reload image, thereby reducing the temperature of the source driver chip.

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  • 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

一种显示装置（100），显示装置（100）包括显示面板（10）、至少一个与显示面板（10）连接的源极驱动器（20）、与源极驱动器（20）连接的伽马寄存器（30）、与伽马寄存器（30）连接的PMIC芯片（40）、以及时序控制器（50），时序控制器（50）包括视频数据重排单元（51）、与视频数据重排单元（51）连接的灰阶统计单元（52）、与灰阶统计单元（52）连接的判断单元（53）、以及与判断单元（53）连接的处理单元（54）。还提供了一种显示装置（100）的驱动方法。能够更改重载画面的伽马电压，降低源极驱动芯片的温度。

Description

显示装置及其驱动方法 技术领域
本申请涉及显示驱动技术领域，尤其涉及一种显示装置及其驱动方法。
 背景技术
现行的FHD（Full High Definition，全高清）、UHD（Ultra High Definition，超高清）等面板驱动框架中会存在一些重载画面。在重载画面中，存在数据电压在高电平和低电平之间频繁切换的现象，在连续的若干行子像素的显示亮度在低亮度与高亮度之间进行频繁切换时，源极驱动芯片处于高负载，其产生过高的温度很容易引起驱动芯片的损坏，使其无法正常工作，并且会造成电流的大量消耗，提高显示面板的功耗。目前业内通常在驱动芯片上增加散热片的方式来解决驱动芯片的过热问题，但此种方式会增加生产成本，不利于显示面板的大规模生产，因此，有必要提出其他方案来解决上述问题。
 技术问题
本申请实施例提供一种显示装置及其驱动方法，以解决现有的显示装置在显示画面时存在重载画面，在显示重载画面时，数据电压会在高电平和低电平之间频繁地切换，导致源极驱动芯片处于高负载，进而导致驱动芯片温度的上升，从而影响驱动芯片性能的技术问题。
 技术解决方案
为解决上述问题，本发明提供的技术方案如下：
本申请实施例提供一种显示装置，包括：显示面板、至少一个与所述显示面板连接的源极驱动器、与所述源极驱动器连接的伽马寄存器、与所述伽马寄存器连接的PMIC（Power Management IC，电源管理集成电路）芯片、以及时序控制器；所述时序控制器的第一输出端与所述源极驱动器连接，所述时序控制器的第二输出端与所述PMIC芯片连接；每一所述源极驱动器连接所述显示面板的多条数据线，每一所述源极驱动器控制与其连接的所述多条数据线所在的显示区域的驱动数据；其中，所述时序控制器包括视频数据重排单元、与所述视频数据重排单元连接的灰阶统计单元、与所述灰阶统计单元连接的判断单元、以及与所述判断单元连接的处理单元；所述视频数据重排单元用以将接收到的视频数据进行重新排列；所述灰阶统计单元用以统计每帧画面内，各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量以及各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的频率；所述判断单元用以判断视频数据是否存在重载画面；所述处理单元用以调节当前画面为重载画面时的伽马电压；所述灰阶统计单元包括灰阶直方图统计单元和频率侦测单元；所述灰阶直方图统计单元用以统计每帧画面内各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量；所述频率侦测单元用以统计每帧画面内各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的总次数；所述源极驱动器包括源极驱动芯片和多条输出走线，多条所述输出走线与多条所述数据线一一对应连接。
在本申请的至少一种实施例中，所述时序控制器的第三输出端与所述伽马寄存器连接。
在本申请的至少一种实施例中，所述PMIC芯片中设置有存储库，所述存储库用以存放设定的伽马参数。
本申请实施例提供另外一种显示装置，包括：显示面板、至少一个与所述显示面板连接的源极驱动器、与所述源极驱动器连接的伽马寄存器、与所述伽马寄存器连接的PMIC（Power Management IC，电源管理集成电路）芯片、以及时序控制器；所述时序控制器的第一输出端与所述源极驱动器连接，所述时序控制器的第二输出端与所述PMIC芯片连接；每一所述源极驱动器连接所述显示面板的多条数据线，每一所述源极驱动器控制与其连接的所述多条数据线所在的显示区域的驱动数据；其中，所述时序控制器包括视频数据重排单元、与所述视频数据重排单元连接的灰阶统计单元、与所述灰阶统计单元连接的判断单元、以及与所述判断单元连接的处理单元；所述视频数据重排单元用以将接收到的视频数据进行重新排列；所述灰阶统计单元用以统计每帧画面内，各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量以及各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的频率；所述判断单元用以判断视频数据是否存在重载画面；所述处理单元用以调节当前画面为重载画面时的伽马电压。
在本申请的至少一种实施例中，所述灰阶统计单元包括灰阶直方图统计单元和频率侦测单元；所述灰阶直方图统计单元用以统计每帧画面内各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量；所述频率侦测单元用以统计每帧画面内各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的总次数。
在本申请的至少一种实施例中，所述时序控制器的第三输出端与所述伽马寄存器连接。
在本申请的至少一种实施例中，所述PMIC芯片中设置有存储库，所述存储库用以存放设定的伽马参数。
在本申请的至少一种实施例中，所述源极驱动器包括源极驱动芯片和多条输出走线，多条所述输出走线与多条所述数据线一一对应连接。
本申请还提供一种上述显示装置的驱动方法，包括：
S10，对接收到的视频数据进行重新排列；
S20，统计每帧画面内，各个源极驱动器所控制的显示区域的灰阶直方图以及各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的频率；
S30，判断所述视频数据是否存在重载画面，若是则执行S40，否则执行S50；
S40，调节所述重载画面对应的伽马电压；
S50，向所述源极驱动器输出伽马电压。
在本申请的至少一种实施例中，在所述S20中，所述灰阶直方图的统计方法包括：统计每帧画面内，各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量。
在本申请的至少一种实施例中，在所述S20中，所述数据线发生高低灰阶跳变的频率统计方法包括：
统计每帧画面内各个所述源极驱动器所控制的显示区域中的各条所述数据线发生高低灰阶跳变的次数；
将每帧画面内同一所述源极驱动器对应的各条所述数据线发生高低灰阶跳变的次数加和，得到所述源极驱动器所控制的显示区域发生高低灰阶灰阶跳变的总次数。
在本申请的至少一种实施例中，在所述S30中，判断所述视频数据是否存在重载画面的方法包括：
逐一判断每帧画面内，每一所述源极驱动器所控制的显示区域发生高低灰阶跳变的总次数是否超过相应的预设值；
在一帧画面内，若满足至少一个所述源极驱动器所控制的显示区域发生高低灰阶跳变的总次数超过相应的所述预设值，则判定所述源极驱动器所控制的显示区域为重载区域，判定所述画面为重载画面；
否则，判定所述画面为轻载画面。
在本申请的至少一种实施例中，在所述S40中，根据所述重载区域对应的所述灰阶直方图得到所述重载区域的驱动数据；
根据所述重载区域的驱动数据重新配置所述伽马寄存器，从而改变所述伽马寄存器输出的伽马电压。
 有益效果
通过在时序控制器内部框架中增加视频数据重排单元和灰阶统计单元，将视频数据进行重排，以及侦测不同源极驱动器驱动的数据线发生高低灰阶跳变的频率，从而判断每个源极驱动器对应的显示区域是否存在重载画面，从而更改重载画面的伽马电压，进而降低源极驱动芯片的温度。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的显示装置的原理图；
图2为本申请实施例提供的显示装置的驱动方法的步骤流程图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
如图1所示，本申请实施例提供一种显示装置100，所示显示装置100包括显示面板10、至少一个源极驱动器20、伽马寄存器30、PMIC（Power Management IC，电源管理集成电路）芯片40、以及时序控制器50。
图1中以两个所述源极驱动器20作示例性说明，但不以此为限。所述源极驱动器20与所述显示面板10连接，每一所述源极驱动器20连接所述显示面板10的多条数据线，每一所述源极驱动器20用以向所述显示面板10中的数据线加载数据电压，即每一所述源极驱动器20控制与其连接的多条数据线所在的显示区域的驱动数据，以实现对该显示区域中的子像素充电。
所述源极驱动器20与所述伽马寄存器30连接，所述伽马寄存器30中储存有所有灰阶对应点所包含的图像亮度与灰阶间的对应关系，所述伽马寄存器30用以向所述源极驱动器20输出伽马电压。
所述PMIC芯片40与所述伽马寄存器30连接，所述PMIC芯片用以提供电源。在所述PMIC芯片40与所述伽马寄存器30之间配置一个所述伽马寄存器30，能够控制所述PMIC芯片40向所述源极驱动器20输送的输出电压大小，对向所述显示面板10加载的驱动电压进行伽马校正，使亮度显示达到最佳。
所述时序控制器50的第一输出端与所述PMIC芯片40连接，所述时序控制器的第二输出端与所述源极驱动器20连接，所述时序控制器50用以向所述PMIC芯片40发出电压控制信号，所述时序控制器50用以向所述源极驱动器发出驱动控制信号。
由于现有的高解析度的显示装置中会出现一些重载画面，导致源极驱动器处于高负载工作环境，其生产过高的温度很容易引起驱动芯片的损坏，本申请实施例通过对时序控制器的内部框架做出改进，从而使得时序控制器能够在判断出视频数据存在重载画面时，对相应的伽马电压做出调整，降低源极驱动器的温度。
具体地，本申请实施例中的所述时序控制器50包括视频数据重排单元51、与所述视频数据重排单元51连接的灰阶统计单元52、与所述灰阶统计单元连接的判断单元53、与所述判断单元连接的处理单元54。
其中，所述视频数据重排单元51用以将接收到的视频数据进行重新排列。
所述灰阶统计单元52用以统计每帧画面内，各个所述源极驱动器20所控制的显示区域的灰阶直方图以及各个所述源极驱动器20所控制的显示区域发生高低灰阶跳变的频率；
所述判断单元53用以判断视频数据是否存在重载画面；
所述处理单元54用以调节当前画面为重载画面时的伽马电压。
进一步地，所述灰阶统计单元52可包括灰阶直方图统计单元521和频率侦测单元522。
所述灰阶直方图统计单元521用以统计每帧画面内各个源极驱动器20所控制的显示区域中各个灰阶出现的数量，即所述灰阶统计直方图的横坐标为各个灰阶值，纵坐标为该灰阶出现的次数。
所述频率侦测单元522用以统计每帧画面内各个源极驱动器20所控制的显示区域发生高低灰阶跳变的总次数。
所述判断单元53根据所述灰阶统计单元52中统计的各个源极驱动器20控制的显示区域的灰阶显示情况来判断所述视频数据是否存在重载画面。
所述处理单元54可通过控制PMIC芯片40的输出电压，来调整重载画面对应的伽马电压。
具体地，所述PMIC芯片40可包括用以存放设定的伽马参数的存储库（bank）41，所述存储库41设定有一组伽马参数，分别为bank A和bank B，bank A和bank B分别对应高电压和低电压中的一种，所述存储库41包括第一控制管脚和第二控制管脚，所述第一控制管脚对应bank A，第二控制管脚对应bank B。可通过改变所述伽马寄存器30在第一控制管脚和第二控制管脚之间的切换连接，来改变所述伽马寄存器30输出的伽马电压。
其他实施例中，所述时序控制器的第三输出端可与所述伽马寄存器30连接，可通过时序控制器实时配置所述伽马寄存器30，从而更改所述伽马寄存器30输出的伽马电压。
所述源极驱动器包括源极驱动芯片和多条输出走线，每条输出走线对应所述源极驱动器的一个输出端，多条所述输出走线与多条所述数据线一一对应连接。
所述PMIC芯片40还与所述显示面板10连接，为所述显示面板10提供电源电压。
如图2所示，所述显示装置100的驱动方法包括：
S10，对接收到的视频数据进行重新排列；
S20，统计每帧画面内，各个源极驱动器20所控制的显示区域的灰阶直方图以及各个所述源极驱动器20所控制的显示区域发生高低灰阶跳变的频率；
S30，判断所述视频数据是否存在重载画面，若是则执行S40，否则执行S50；
S40，调节所述重载画面对应的伽马电压；
S50，向所述源极驱动器输出伽马电压。
由于不同显示面板的架构的驱动方式不同，例如1G1D架构、双栅极架构、三栅极架构，因此需要根据显示面板的不同架构，对所述视频数据进行重排。
通过所述视频数据重排单元对所述视频数据进行自动重排，根据每条数据线所对应的显示数据进行数据重排，以便于后续统计每条数据线在每帧画面内发生高低灰阶跳变的次数。
所述S20中，所述灰阶直方图统计可利用所述灰阶直方图统计单元521来完成。所述灰阶直方图统计单元521通过接收重排后的视频数据，来统计每帧画面内，各个源极驱动器20所控制的显示区域中各个灰阶出现的数量，以便于后续锁定发生高低灰阶跳变的位置。
所述S20中，所述数据线发生高低灰阶跳变的频率统计可利用频率侦测单元522来完成。首先统计每帧画面内各个所述源极驱动器20所控制的显示区域中的各条所述数据线发生高低灰阶跳变的次数；之后将每帧画面内同一所述源极驱动器20对应的各条所述数据线发生高低灰阶跳变的次数加和，得到所述源极驱动器20所控制的显示区域发生高低灰阶灰阶跳变的总次数。
所述S30中，判断所述视频数据是否存在重载画面的方法包括：
逐一判断每帧画面内，每一所述源极驱动器20所控制的显示区域发生高低灰阶跳变的总次数是否超过相应的预设值。
在一帧画面内，若满足至少一个所述源极驱动器20所控制的显示区域发生高低灰阶跳变的总次数超过相应的所述预设值，则判定所述源极驱动器20所控制的显示区域为重载区域，判定所述画面为重载画面；否则，判定所述画面为轻载画面。
由于不同架构的显示面板，高低灰阶跳变判定的标准不同，需要根据实际的显示面板具体设定标准。例如一条数据线从当前灰阶跳变到下一灰阶，当前灰阶对应的驱动电压与下一灰阶对应的驱动电压的差值超过设定阈值，则判断该跳变为高低灰阶跳变。又例如8bit的显示面板，假设低灰阶为0灰阶~128灰阶，高灰阶为129灰阶~255灰阶，当一条数据线从当前灰阶跳变到下一灰阶，若当前灰阶和下一灰阶分别为低灰阶和高灰阶中的一种，则判断该跳变为高低灰阶跳变。
在一帧画面内，若存在至少一个所述源极驱动器20所控制的显示区域发生高低灰阶跳变的总次数超过相应的所述预设值，则调节该帧画面对应的伽马电压，若没有超过，则按照默认设定值输出伽马电压。该预设值为预先设定在所述时序控制器中的参数值，所述预设值需要结合具体的显示面板的架构做限定，因此这里不做限制。
可通过所述时序控制器50的处理单元54控制PMIC芯片40切换存储库41中的第一控制管脚或第二控制管脚，来调节所述伽马寄存器30中输出的伽马电压。
或者通过所述时序控制器50的处理单元54实时控制所述伽马寄存器30，从而改变伽马电压。
通过所述时序控制器50的处理单元54实时控制所述伽马寄存器30的原理包括：根据所述重载区域对应的所述灰阶直方图，得到所述重载区域的驱动数据；根据所述重载区域的驱动数据重新配置所述伽马寄存器30，从而改变所述伽马寄存器30输出的伽马电压，进而降低源极驱动器20的温度。
通过在时序控制器内部框架中增加视频数据重排单元和灰阶统计单元，将视频数据进行重排，以及侦测不同源极驱动器驱动的数据线发生高低灰阶跳变的频率，从而判断每个源极驱动器对应的显示区域是否存在重载画面，从而更改重载画面的伽马电压，进而降低源极驱动芯片的温度。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种显示装置及驱动方法进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (13)

  1. 一种显示装置，其包括：
    显示面板、至少一个与所述显示面板连接的源极驱动器、与所述源极驱动器连接的伽马寄存器、与所述伽马寄存器连接的PMIC芯片、以及时序控制器；
    所述时序控制器的第一输出端与所述源极驱动器连接，所述时序控制器的第二输出端与所述PMIC芯片连接；
    每一所述源极驱动器连接所述显示面板的多条数据线，每一所述源极驱动器控制与其连接的所述多条数据线所在的显示区域的驱动数据；其中，
    所述时序控制器包括视频数据重排单元、与所述视频数据重排单元连接的灰阶统计单元、与所述灰阶统计单元连接的判断单元、以及与所述判断单元连接的处理单元；
    所述视频数据重排单元用以将接收到的视频数据进行重新排列；
    所述灰阶统计单元用以统计每帧画面内，各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量以及各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的频率；
    所述判断单元用以判断视频数据是否存在重载画面；
    所述处理单元用以调节当前画面为重载画面时的伽马电压；
    所述灰阶统计单元包括灰阶直方图统计单元和频率侦测单元；所述灰阶直方图统计单元用以统计每帧画面内各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量；所述频率侦测单元用以统计每帧画面内各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的总次数；
    所述源极驱动器包括源极驱动芯片和多条输出走线，多条所述输出走线与多条所述数据线一一对应连接。
  2. 根据权利要求1所述的显示装置，其中，所述时序控制器的第三输出端与所述伽马寄存器连接。
  3. 根据权利要求1所述的显示装置，其中，所述PMIC芯片中设置有存储库，所述存储库用以存放设定的伽马参数。
  4. 一种显示装置，其包括：
    显示面板、至少一个与所述显示面板连接的源极驱动器、与所述源极驱动器连接的伽马寄存器、与所述伽马寄存器连接的PMIC芯片、以及时序控制器；
    所述时序控制器的第一输出端与所述源极驱动器连接，所述时序控制器的第二输出端与所述PMIC芯片连接；
    每一所述源极驱动器连接所述显示面板的多条数据线，每一所述源极驱动器控制与其连接的所述多条数据线所在的显示区域的驱动数据；其中，
    所述时序控制器包括视频数据重排单元、与所述视频数据重排单元连接的灰阶统计单元、与所述灰阶统计单元连接的判断单元、以及与所述判断单元连接的处理单元；
    所述视频数据重排单元用以将接收到的视频数据进行重新排列；
    所述灰阶统计单元用以统计每帧画面内，各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量以及各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的频率；
    所述判断单元用以判断视频数据是否存在重载画面；
    所述处理单元用以调节当前画面为重载画面时的伽马电压。
  5. 根据权利要求4所述的显示装置，其中，所述灰阶统计单元包括灰阶直方图统计单元和频率侦测单元；所述灰阶直方图统计单元用以统计每帧画面内各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量；所述频率侦测单元用以统计每帧画面内各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的总次数。
  6. 根据权利要求4所述的显示装置，其中，所述时序控制器的第三输出端与所述伽马寄存器连接。
  7. 根据权利要求4所述的显示装置，其中，所述PMIC芯片中设置有存储库，所述存储库用以存放设定的伽马参数。
  8. 根据权利要求4所述的显示装置，其中，所述源极驱动器包括源极驱动芯片和多条输出走线，多条所述输出走线与多条所述数据线一一对应连接。
  9. 一种显示装置的驱动方法，其包括：
    S10，对接收到的视频数据进行重新排列；
    S20，统计每帧画面内，各个源极驱动器所控制的显示区域的灰阶直方图以及各个所述源极驱动器所控制的显示区域发生高低灰阶跳变的频率；
    S30，判断所述视频数据是否存在重载画面，若是则执行S40，否则执行S50；
    S40，调节所述重载画面对应的伽马电压；
    S50，向所述源极驱动器输出伽马电压。
  10. 根据权利要求9所述的驱动方法，其中，在所述S20中，所述灰阶直方图的统计方法包括：统计每帧画面内，各个所述源极驱动器所控制的显示区域中各个灰阶出现的数量。
  11. 根据权利要求10所述的驱动方法，其中，在所述S20中，所述数据线发生高低灰阶跳变的频率统计方法包括：
    统计每帧画面内各个所述源极驱动器所控制的显示区域中的各条所述数据线发生高低灰阶跳变的次数；
    将每帧画面内同一所述源极驱动器对应的各条所述数据线发生高低灰阶跳变的次数加和，得到所述源极驱动器所控制的显示区域发生高低灰阶灰阶跳变的总次数。
  12. 根据权利要求11所述的驱动方法，其中，在所述S30中，判断所述视频数据是否存在重载画面的方法包括：
    逐一判断每帧画面内，每一所述源极驱动器所控制的显示区域发生高低灰阶跳变的总次数是否超过相应的预设值；
    在一帧画面内，若满足至少一个所述源极驱动器所控制的显示区域发生高低灰阶跳变的总次数超过相应的所述预设值，则判定所述源极驱动器所控制的显示区域为重载区域，判定所述画面为重载画面；
    否则，判定所述画面为轻载画面。
  13. 根据权利要求12所述的驱动方法，其中，在所述S40中，
    根据所述重载区域对应的所述灰阶直方图得到所述重载区域的驱动数据；
    根据所述重载区域的驱动数据重新配置伽马寄存器，从而改变所述伽马寄存器输出的伽马电压。
PCT/CN2020/071095 2019-12-27 2020-01-09 显示装置及其驱动方法 Ceased WO2021128488A1 (zh)

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