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WO2017012301A1 - 显示驱动装置和显示驱动方法以及显示装置 - Google Patents

显示驱动装置和显示驱动方法以及显示装置 Download PDF

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Publication number
WO2017012301A1
WO2017012301A1 PCT/CN2016/070388 CN2016070388W WO2017012301A1 WO 2017012301 A1 WO2017012301 A1 WO 2017012301A1 CN 2016070388 W CN2016070388 W CN 2016070388W WO 2017012301 A1 WO2017012301 A1 WO 2017012301A1
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WIPO (PCT)
Prior art keywords
grayscale value
equal
frequency
pixel points
display
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PCT/CN2016/070388
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English (en)
French (fr)
Inventor
卞青芳
董学
陈东
张�浩
时凌云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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Priority to US15/105,678 priority Critical patent/US10229627B2/en
Publication of WO2017012301A1 publication Critical patent/WO2017012301A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/2092—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/18—Timing circuits for raster scan displays
    • 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
    • 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
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a display driving device, a display device, and a display driving method.
  • the technical problem to be solved by the present invention is how to reduce the power consumption of the display.
  • the present invention provides a display driving apparatus including: a statistical unit, a comparison unit, and a driving unit,
  • the statistical unit is configured to count the number of first pixels in the image displayed by the target display that the grayscale value is greater than or equal to the first grayscale value and the number of other pixels whose grayscale value is less than the first grayscale value;
  • the comparing unit is configured to compare the number of the first pixel points and the number of the other pixel points, and if the number of the first pixel points is greater than or equal to the number of the other pixel points, then to the driving unit Transmitting the first instruction;
  • the driving unit is configured to control a refresh frequency of the target display to be greater than or equal to a first frequency if the first instruction is received, and otherwise control a refresh frequency of the target display to be smaller than the first frequency.
  • the statistical unit is further configured to count the number of second pixel points whose grayscale value is smaller than the first grayscale value and greater than or equal to the second grayscale value, and the grayscale value is smaller than the first a number of third pixel points having a second gray scale value and greater than or equal to the third gray scale value, ..., and an Nth pixel having a grayscale value smaller than the N-1th grayscale value and greater than or equal to the Nth grayscale value The number of points;
  • the comparing unit is further configured to compare the number of the first to Nth pixel points, and if the number of the nth pixel points is the largest among the number of the first to Nth pixel points, transmit the number to the driving unit n instruction;
  • the driving unit is further configured to, if the nth instruction is received, control the target display to be refreshed at an nth frequency, where n and N are positive integers, and 1 ⁇ n ⁇ N, N>1, The n-1 frequency is greater than the nth frequency.
  • the difference between the n-1th frequency and the nth frequency is greater than or equal to the difference between the nth frequency and the n+1th frequency.
  • N 4
  • the first grayscale value is greater than 190 and less than 200
  • the second grayscale value is greater than 120 and less than 130
  • the third grayscale value is greater than 60 and less than 70.
  • the first grayscale value is equal to 192
  • the second grayscale value is equal to 127
  • the third grayscale value is equal to 63
  • the first refresh rate is equal to 60 Hz
  • the second refresh rate is equal to 50 Hz
  • the third refresh rate is equal to 42 Hz
  • the fourth refresh rate is equal to 36 Hz.
  • N 3
  • the first grayscale value is greater than 190 and less than 200
  • the second grayscale value is greater than 120 and less than 130.
  • the first grayscale value is equal to 192
  • the second grayscale value is equal to 127
  • the first refresh rate is equal to 60 Hz
  • the second refresh rate is equal to 50 Hz
  • the third refresh rate is equal to 42 Hz.
  • N 2
  • the first grayscale value is greater than 190 and less than 200.
  • the first grayscale value is equal to 192 and the first refresh rate is equal to 60 Hz.
  • the statistical unit counts, according to a preset period, the number of first pixels in the image displayed by the target display that the grayscale value is greater than or equal to the first grayscale value, and the grayscale value is less than The number of other pixels of the first grayscale value.
  • the display driving apparatus further includes:
  • a frequency selection unit configured to set a refresh frequency of the target display.
  • the present invention also proposes a display device comprising a display panel and the above display driving device.
  • the invention also proposes a display driving method, comprising:
  • controlling a refresh frequency of the target display to be greater than or equal to a first frequency; otherwise, controlling a refresh frequency of the target display to be less than the first frequency.
  • the display driving method further includes:
  • the target display is controlled to be refreshed at an nth frequency, where n and N are positive integers, and 1 ⁇ n ⁇ N, N>1, and the n-1th frequency is greater than the nth frequency.
  • the difference between the n-1th frequency and the nth frequency is greater than or equal to the difference between the nth frequency and the n+1th frequency.
  • the number of first pixel points in which the grayscale value is greater than or equal to the first grayscale value and the grayscale value is smaller than the first grayscale value in the image displayed by the statistical target display includes:
  • the display driving method further includes:
  • the refresh frequency of the display can be reduced, thereby reducing the power consumption of the display, without affecting the viewing effect of the user.
  • FIG. 1 shows a schematic block diagram of a display driving device in accordance with one embodiment of the present invention
  • FIG. 2 shows a schematic flow chart of a display driving method according to an embodiment of the present invention
  • a display driving device 10 includes a statistical unit 11, a comparing unit 12, and a driving unit 13.
  • the statistical unit 11 is configured to count the number of first pixels in the image displayed by the target display that the grayscale value is greater than or equal to the first grayscale value and the number of other pixels whose grayscale value is smaller than the first grayscale value;
  • the comparing unit 12 is configured to compare the number of the first pixel points with the number of other pixel points, and if the number of the first pixel points is greater than or equal to the number of other pixel points, transmit the first instruction to the driving unit 13;
  • the driving unit 13 is configured to control the refresh frequency of the target display to be greater than or equal to the first frequency if the first command is received, and otherwise, the refresh frequency of the control target display is less than the first frequency.
  • the human eye has a relatively high refresh interval sensitivity for images with higher grayscale values, and a relatively low refresh interval sensitivity for images with lower grayscale values. Therefore, in the image displayed by the target display, when the pixel point with the higher grayscale value (ie, the first pixel point) is more than the pixel point with the lower grayscale value (ie, other pixel points), it can be determined that the image is a grayscale value.
  • the high image can control the target display to refresh at a higher frequency (ie, a frequency greater than or equal to the first frequency), so that the refresh interval of the image is shorter, and the viewing effect of the user is ensured.
  • the pixel with a higher grayscale value is less than the pixel with a lower grayscale value, it can be determined that the image is an image with a lower grayscale value, so that the target display can be controlled at a lower frequency (ie, less than the first A frequency of frequency) is refreshed.
  • the refresh frequency is lowered, thereby reducing the power consumption of the target display.
  • the power saving effect is particularly obvious, which can greatly improve their endurance.
  • the statistical unit 11 is further configured to count the number of second pixel points whose grayscale value is smaller than the first grayscale value and greater than or equal to the second grayscale value, and the grayscale value is smaller than the second grayscale The number of third pixel points whose value is greater than or equal to the third gray scale value, ..., and the number of Nth pixel points whose grayscale value is smaller than the N-1th grayscale value and greater than or equal to the Nth grayscale value ;
  • the comparing unit 12 is further configured to compare the number of the first to Nth pixel points, and if the number of the nth pixel points is the largest among the number of the first to Nth pixel points, transmit the nth instruction to the driving unit 13;
  • the driving unit 13 is further configured to control the target display to refresh at the nth frequency if the nth instruction is received, wherein n and N are positive integers, and 1 ⁇ n ⁇ N, N>1, the n-1th frequency is greater than The nth frequency.
  • the grayscale value of the image with lower grayscale value is unchanged when the refresh frequency is constant (for example, the grayscale value of the image of two adjacent frames)
  • the visual residual caused by the difference is more sensitive to the visual residual caused by the change of the grayscale value when the image with higher grayscale value is constant.
  • the human eye In the case where the refresh frequency is constant, for the case where the grayscale value of the image is high, the human eye is not easy to perceive the change of the grayscale value, and for the case where the grayscale value of the image is low, the human eye can easily perceive the grayscale value.
  • Change For example, the grayscale value changes from 233 to 193, and the amount of change is -40.
  • the human eye is not easy to perceive the change of the grayscale value; the grayscale value changes from 130 to 90, and the amount of change is also -40, but the human eye is more likely to detect The change to the grayscale value.
  • further subdivision statistics are performed for other pixel points whose grayscale values are smaller than the first grayscale value, and the corresponding refreshing frequency can be respectively set when the target display displays images of different grayscale values, thereby being able to
  • the reduction in the grayscale value of the image gradually reduces the refresh rate instead of directly setting a very low refresh rate. Therefore, it is ensured that when the grayscale value of the image with a lower grayscale value changes, it is not easily perceived by the user, thereby reducing the display power consumption while ensuring the user's viewing effect.
  • the difference between the n-1th frequency and the nth frequency is greater than or equal to the difference between the nth frequency and the n+1th frequency.
  • the refreshing frequency is gradually reduced. , you can gradually reduce the difference in refresh rate.
  • the first refreshing frequency is equal to 60 Hz
  • the second refreshing frequency is equal to 50 Hz
  • the difference between the two is 10 Hz.
  • the difference between the second refreshing frequency and the third refreshing frequency may be made smaller than 10 Hz, for example, the difference is 8 Hz
  • the third refresh frequency can be set equal to 42 Hz, and accordingly, in order to ensure that the difference between the third refresh frequency and the fourth refresh frequency is less than 8 Hz, for example, the difference is 6 Hz, the fourth refresh frequency can be set. Equal to 36Hz.
  • the image can still be refreshed with a refresh frequency that is not too low, thereby reducing the influence of the visual residual on the viewing effect, and further ensuring the viewing effect of the user.
  • N 4
  • the first grayscale value is greater than 190 and less than 200
  • the second grayscale value is greater than 120 and less than 130
  • the third grayscale value is greater than 60 and less than 70.
  • the first grayscale value is equal to 192
  • the second grayscale value is equal to 127
  • the third grayscale value is equal to 63
  • the first refreshing frequency is equal to 60Hz
  • the second refreshing frequency is equal to 50Hz
  • the third refreshing The frequency is equal to 42 Hz and the fourth refresh rate is equal to 36 Hz.
  • the human eye is insensitive to changes in grayscale values when the grayscale value is greater than 192, and the grayscale value is changed when the refreshing frequency is constant. Further, It is more sensitive to the change of the grayscale value when the pixel whose grayscale value is below 127 is constant at the refresh frequency, and is most sensitive to the change of the grayscale value when the pixel whose grayscale value is below 63 is not changed at the refresh frequency. Therefore, it is possible to further subdivide the pixel points whose grayscale value is less than 192, so that when the grayscale value of the pixel of the image changes, the user can be prevented from being perceived and the power consumption of the target display can be reduced.
  • N 3
  • the first grayscale value is greater than 190 and less than 200
  • the second grayscale value is greater than 120 and less than 130.
  • the first grayscale value is equal to 192
  • the second grayscale value is equal to 127
  • the first refresh rate is equal to 60 Hz
  • the second refresh frequency is equal to 50 Hz
  • the third refresh frequency is equal to 42 Hz.
  • N 2
  • the first grayscale value is greater than 190 and less than 200.
  • the first grayscale value is equal to 192 and the first refresh rate is equal to 60 Hz.
  • the value of N can be set as needed, or the refresh frequency corresponding to different grayscale values can be set as needed.
  • the statistics unit 11 counts, according to a preset period, the number of first pixels in the image displayed by the target display that the grayscale value is greater than or equal to the first grayscale value and the grayscale value is smaller than the first grayscale The number of other pixels of the value.
  • the preset period the number of the first pixel points and the number of other pixels are counted, so that the statistical unit 11 frequently counts the number of pixels of different grayscale values frequently when the grayscale value of the image displayed by the target display frequently changes.
  • the refresh rate is changed to cause power consumption.
  • the preset period can be set to be short, for example, 0.5 seconds.
  • the display driving device 10 may further include: a frequency selecting unit 14 for setting a refresh frequency of the target display.
  • the refresh rate of the target display can be set according to specific needs.
  • the embodiment of the invention further provides a display device comprising a display panel and the display driving device, wherein the display driving device is used for driving the display panel.
  • the display device in this embodiment may be any product or component having a display function, such as an electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, and the like.
  • the display driving method according to an embodiment of the present invention may include:
  • the refresh rate of the control target display is greater than or equal to the first frequency, otherwise, the refresh frequency of the control target display is less than the first frequency.
  • the display driving method may further include:
  • the control target display is refreshed at the nth frequency, where n and N are positive integers, and 1 ⁇ n ⁇ N, N>1, and the n-1th frequency is greater than the nth frequency.
  • the display driving method may include:
  • A1 detecting a grayscale value of a pixel in an image displayed by the target display
  • the number of the first pixel points whose grayscale value is greater than or equal to 192 in the image displayed by the target display is Counter_A
  • the number of second pixels having a grayscale value less than 192 and greater than or equal to 127 is Counter_B
  • the grayscale value is less than 127.
  • control target display is refreshed at a frequency of 60 Hz, and if the second instruction is generated, the control target display is refreshed at a frequency of 50 Hz, and if the third instruction is generated, the control target display is refreshed at a frequency of 42 Hz.
  • the difference between the n-1th frequency and the nth frequency is greater than or equal to the difference between the nth frequency and the n+1th frequency.
  • the number of first pixels in the image displayed by the statistical target display whose grayscale value is greater than or equal to the first grayscale value and the number of other pixels in which the grayscale value is smaller than the first grayscale value include:
  • the number of first pixels in the image displayed by the target display whose grayscale value is greater than or equal to the first grayscale value and the number of other pixels in which the grayscale value is smaller than the first grayscale value are counted according to a preset period.
  • the display driving method may further include:
  • the refresh frequency of the display can be reduced without affecting the viewing effect of the user, thereby reducing the power consumption of the display.
  • the terms “first”, “second”, “third” and the like are used for descriptive purposes only, and are not to be construed as indicating or implying relative importance.
  • the term “plurality” refers to two or more, unless specifically defined otherwise.

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Abstract

一种显示驱动装置（10）、显示驱动方法和显示装置。上述显示驱动装置包括：统计单元（11）、比较单元（12）和驱动单元（13），统计单元（11）配置为统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于第一灰阶值的其他像素点的数量；比较单元（12）配置为比较第一像素点的数量和其他像素点的数量，如果第一像素点的数量大于或等于其他像素点的数量，则向驱动单元（13）传输第一指令；驱动单元（13）配置为，如果接收到第一指令，则控制目标显示器的刷新频率大于或等于第一频率，否则，控制目标显示器的刷新频率小于第一频率。通过上述技术方案，可以在几乎不对用户的观看效果造成影响的情况下，降低显示器的刷新频率，从而降低显示器的功耗。

Description

显示驱动装置和显示驱动方法以及显示装置 技术领域
本发明涉及显示技术领域，具体而言，涉及一种显示驱动装置、一种显示装置和一种显示驱动方法。
背景技术
随着显示技术的发展和用户需求的提高，对于显示器设计和显示的要求越来越高。随着显示器显示效果的提高，相应问题也随之产生，功耗问题就是其中之一。对于手机、平板电脑等依靠电池工作的终端而言，功耗问题更为明显。
发明内容
本发明所要解决的技术问题是，如何降低显示器的功耗。
为此目的，本发明提出了一种显示驱动装置，包括：统计单元、比较单元和驱动单元，
统计单元配置为统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量；
所述比较单元配置为比较所述第一像素点的数量和所述其他像素点的数量，如果所述第一像素点的数量大于或等于所述其他像素点的数量，则向所述驱动单元传输第一指令；
所述驱动单元配置为，如果接收到所述第一指令，则控制所述目标显示器的刷新频率大于或等于第一频率，否则，控制所述目标显示器的刷新频率小于所述第一频率。
根据本发明的另一实施例，所述统计单元还配置为统计灰阶值小于所述第一灰阶值且大于或等于第二灰阶值的第二像素点的数量，灰阶值小于第二灰阶值且大于或等于第三灰阶值的第三像素点的数量，...，以及灰阶值小于第N-1灰阶值且大于或等于第N灰阶值的第N像素点的数量；
所述比较单元还配置为比较所述第一至第N像素点的数量，如果在所述第一至第N像素点的数量中第n像素点的数量最大，则向所述驱动单元传输第n指令；
所述驱动单元还配置为，如果接收到所述第n指令，则控制所述目标显示器以第n频率刷新，其中，n和N为正整数，且1＜n≤N，N＞1，第 n-1频率大于第n频率。
根据本发明的另一实施例，第n-1频率与第n频率的差值大于或等于第n频率与第n+1频率的差值。
根据本发明的另一实施例，N＝4，所述第一灰阶值大于190且小于200，所述第二灰阶值大于120且小于130，所述第三灰阶值大于60且小于70。
根据本发明的另一实施例，所述第一灰阶值等于192，所述第二灰阶值等于127，所述第三灰阶值等于63，
第一刷新频率等于60Hz，第二刷新频率等于50Hz，第三刷新频率等于42Hz，第四刷新频率等于36Hz。
根据本发明的另一实施例，N＝3，所述第一灰阶值大于190且小于200，所述第二灰阶值大于120且小于130。
根据本发明的另一实施例，所述第一灰阶值等于192，所述第二灰阶值等于127，
第一刷新频率等于60Hz，第二刷新频率等于50Hz，第三刷新频率等于42Hz。
根据本发明的另一实施例，N＝2，所述第一灰阶值大于190且小于200。
根据本发明的另一实施例，所述第一灰阶值等于192，第一刷新频率等于60Hz。
根据本发明的另一实施例，所述统计单元按照预设周期统计所述目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量。
根据本发明的另一实施例，所述显示驱动装置还包括：
频率选择单元，用于设置所述目标显示器的刷新频率。
本发明还提出了一种显示装置，包括显示面板和上述的显示驱动装置。
本发明还提出了一种显示驱动方法，包括：
统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量；
比较所述第一像素点的数量和所述其他像素点的数量，如果所述第一像素点的数量大于或等于所述其他像素点的数量，则生成第一指令；
如果生成所述第一指令，则控制所述目标显示器的刷新频率大于或等于第一频率，否则，控制所述目标显示器的刷新频率小于所述第一频率。
根据本发明的另一实施例，显示驱动方法还包括：
统计灰阶值小于所述第一灰阶值且大于或等于第二灰阶值的第二像素点的数量，灰阶值小于第二灰阶值且大于或等于第三灰阶值的第三像素点的数量，...，以及灰阶值小于第N-1灰阶值且大于或等于第N灰阶值的第N像素点的数量；
比较所述第一至第N像素点的数量，如果在所述第一至第N像素点的数量中第n像素点的数量最大，则生成第n指令；
如果生成所述第n指令，则控制所述目标显示器以第n频率刷新，其中，n和N为正整数，且1＜n≤N，N＞1，第n-1频率大于第n频率。
根据本发明的另一实施例，第n-1频率与第n频率的差值大于或等于第n频率与第n+1频率的差值。
根据本发明的另一实施例，所述统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量包括：
按照预设周期统计所述目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量。
根据本发明的另一实施例，显示驱动方法还包括：
设置所述目标显示器的刷新频率。
通过上述技术方案，可以在几乎不对用户的观看效果造成影响的情况下，降低显示器的刷新频率，从而降低显示器的功耗。
附图说明
通过参考附图会更加清楚的理解本发明的特征和优点，附图是示意性的而不应理解为对本发明进行任何限制，在附图中：
图1示出了根据本发明一个实施例的显示驱动装置的示意框图；
图2示出了根据本发明一个实施例的显示驱动方法的示意流程图；
图3示出了N＝3的情况下的显示驱动方法的示意流程图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是， 本发明还可以采用不同于在此描述的方式的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
如图1所示，根据本发明一个实施例的显示驱动装置10包括：统计单元11、比较单元12和驱动单元13。
统计单元11配置为统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量；
比较单元12配置为比较第一像素点的数量和其他像素点的数量，如果第一像素点的数量大于或等于其他像素点的数量，则向驱动单元13传输第一指令；
驱动单元13配置为，如果接收到第一指令，则控制目标显示器的刷新频率大于或等于第一频率，否则，控制目标显示器的刷新频率小于第一频率。
人眼对于灰阶值较高的图像的刷新间隔敏感度相对较高，对于灰阶值较低的图像的刷新间隔敏感度相对较低。因此，在目标显示器显示的图像中，灰阶值较高的像素点(即第一像素点)比灰阶值较低的像素点(即其他像素点)多时，可以判定图像为灰阶值较高的图像，从而可以控制目标显示器以较高的频率(即大于或等于第一频率的频率)刷新，使得图像的刷新间隔较短，保证用户的观看效果。
相应地，如果灰阶值较高的像素点比灰阶值较低的像素点少，则可以判定图像为灰阶值较低的图像，从而可以控制目标显示器以较低的频率(即小于第一频率的频率)刷新。由此，在几乎不对用户的观看效果造成影响的情况下，降低了刷新频率，从而降低了目标显示器的功耗。对于手机、平板电脑等依靠电池供电的终端而言，电能节省效果尤为明显，能够极大地提高其续航能力。
根据本发明的另一实施例，统计单元11还配置为统计灰阶值小于第一灰阶值且大于或等于第二灰阶值的第二像素点的数量，灰阶值小于第二灰阶值且大于或等于第三灰阶值的第三像素点的数量，...，以及灰阶值小于第N-1灰阶值且大于或等于第N灰阶值的第N像素点的数量；
比较单元12还配置为比较第一至第N像素点的数量，如果在第一至第N像素点的数量中第n像素点的数量最大，则向驱动单元13传输第n指令；
驱动单元13还配置为，如果接收到第n指令，则控制目标显示器以第n频率刷新，其中，n和N为正整数，且1＜n≤N，N＞1，第n-1频率大于第n频率。
人眼对于灰阶值较低的图像的刷新间隔敏感度虽然较低，但是对于灰阶值较低的图像在刷新频率不变时的灰阶值变化(例如相邻两帧图像的灰阶值的差异)所引起的视觉残留，相对于灰阶值较高的图像在刷新频率不变时的灰阶值变化所引起的视觉残留更为敏感。
在刷新频率一定的情况下，对于图像的灰阶值较高的情形，人眼不易察觉到灰阶值的变化，而对于图像的灰阶值较低的情形，人眼容易察觉到灰阶值的改变。例如，灰阶值从233变为193，变化量为-40，人眼不易察觉到灰阶值的变化；灰阶值从130变为90，变化量也为-40，但人眼较易察觉到灰阶值的改变。
因此，如果将灰阶值小于第一灰阶值的其他像素点统计为一类像素点并且在该类像素点在显示器显示的图像中较多时以一个较低的频率来刷新，虽然能够明显地降低显示器的功耗，但是也会对用户的观看效果造成一些影响。
根据本实施例，对于灰阶值小于第一灰阶值的其他像素点进行了进一步的细分统计，并且可以在目标显示器显示不同灰阶值的图像时分别设置相应的刷新频率，从而能够随着图像灰阶值的降低逐步降低刷新频率，而不是直接设置一个很低的刷新频率。由此，保证了在灰阶值较低的图像的灰阶值发生变化时，不易被用户所察觉，从而在降低显示功耗的同时保证了用户的观看效果。
根据本发明的另一实施例，第n-1频率与第n频率的差值大于或等于第n频率与第n+1频率的差值。
由于用户对于灰阶值较低的图像的灰阶值变化相对于灰阶值较高的图像的灰阶值变化更为敏感，因此随着图像灰阶值的降低，在逐步降低刷新频率的同时，可以逐渐减小刷新频率的差值。
例如，N＝4，第一刷新频率等于60Hz，第二刷新频率等于50Hz，两者差值为10Hz，在设置第三刷新频率时，可以使得第二刷新频率与第三刷新频率的差值小于10Hz，例如差值为8Hz，那么可以设置第三刷新频率等于42Hz，相应地，为了保证第三刷新频率与第四刷新频率的差值小于8Hz，例如差值为6Hz，可以设置第四刷新频率等于36Hz。
由此，保证了在显示器显示图像的灰阶值较低时，仍然能够以一个并非过低的刷新频率来刷新图像，从而降低了视觉残留对观看效果的影响，进一步保证了用户的观看效果。
根据本发明的另一实施例，N＝4，第一灰阶值大于190且小于200，第二灰阶值大于120且小于130，第三灰阶值大于60且小于70。
根据本发明的另一实施例，第一灰阶值等于192，第二灰阶值等于127，第三灰阶值等于63，第一刷新频率等于60Hz，第二刷新频率等于50Hz，第三刷新频率等于42Hz，第四刷新频率等于36Hz。
人眼对于灰阶值大于192的像素点在刷新频率不变时的灰阶值变化不敏感，对于灰阶值小于192的像素点在刷新频率不变时的灰阶值变化敏感，进一步地，对于灰阶值在127以下的像素点在刷新频率不变时的灰阶值变化更敏感，对于灰阶值在63以下的像素点在刷新频率不变时的灰阶值变化最敏感。因此，可以对灰阶值小于192的像素点进行进一步细分统计，以便在图像的像素点的灰阶值发生变化时，能够避免用户察觉，并降低目标显示器的功耗。
根据本发明的另一实施例，N＝3，第一灰阶值大于190且小于200，第二灰阶值大于120且小于130。
根据本发明的另一实施例，第一灰阶值等于192，第二灰阶值等于127，第一刷新频率等于60Hz，第二刷新频率等于50Hz，第三刷新频率等于42Hz。
根据本发明的另一实施例，N＝2，第一灰阶值大于190且小于200。
根据本发明的另一实施例，第一灰阶值等于192，第一刷新频率等于60Hz。
以上实施例示出了N＝2、N＝3和N＝4三种情况下的灰阶值设置和对应的刷新频率。实践中可以根据需要设置N的值，也可以根据需要设置不同灰阶值对应的刷新频率。
根据本发明的另一实施例，统计单元11按照预设周期统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于第一灰阶值的其他像素点的数量。
按照预设周期统计第一像素点的数量以及其他像素点的数量，可以避免在目标显示器显示的图像的灰阶值频繁变化时，统计单元11频繁统计不同灰阶值的像素点的数量从而频繁变换刷新频率而造成电量的消耗。当 然，为了提升用户的视觉体验，预设周期可以设置得较短，例如0.5秒。
根据本发明的另一实施例，显示驱动装置10还可以包括：频率选择单元14，其用于设置目标显示器的刷新频率。
由于不同用户对于图像刷新频率的敏感度不同，因此可以根据具体需要来设置目标显示器的刷新频率。
本发明实施例还提出了一种显示装置，包括显示面板和上述显示驱动装置，显示驱动装置用于驱动显示面板。
需要说明的是，本实施例中的显示装置可以为：电子纸、手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
如图2所示，根据本发明一个实施例的显示驱动方法可以包括：
S1，统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于第一灰阶值的其他像素点的数量；
S2，比较第一像素点的数量和其他像素点的数量，如果第一像素点的数量大于或等于其他像素点的数量，则生成第一指令；
S3，如果生成第一指令，则控制目标显示器的刷新频率大于或等于第一频率，否则，控制目标显示器的刷新频率小于第一频率。
根据本发明的另一实施例，显示驱动方法还可以包括：
统计灰阶值小于第一灰阶值且大于或等于第二灰阶值的第二像素点的数量，灰阶值小于第二灰阶值且大于或等于第三灰阶值的第三像素点的数量，...，以及灰阶值小于第N-1灰阶值且大于或等于第N灰阶值的第N像素点的数量；
比较第一至第N像素点的数量，如果在第一至第N像素点的数量中第n像素点的数量最大，则生成第n指令；
如果生成第n指令，则控制目标显示器以第n频率刷新，其中，n和N为正整数，且1＜n≤N，N＞1，第n-1频率大于第n频率。
例如，如图3所示，在N＝3、第一灰阶值等于192、第二灰阶值等于127的情况下，显示驱动方法可以包括：
A1，检测目标显示器显示的图像中像素点的灰阶值；
A2，统计目标显示器显示的图像中灰阶值大于或等于192的第一像素点的数量Counter_A，灰阶值小于192且大于或等于127的第二像素点的数量Counter_B，以及灰阶值小于127的第三像素点的数量Counter_C；
A3，比较Counter_A、Counter_B和Counter_C，如果Counter_A最大，则生成第一指令，如果Counter_B最大，则生成第二指令，如果Counter_C最大，则生成第三指令，上述第一至第三指令中包含频率信息；
A4，如果生成第一指令，则控制目标显示器以60Hz的频率刷新，如果生成第二指令，则控制目标显示器以50Hz的频率刷新，如果生成第三指令，则控制目标显示器以42Hz的频率刷新。
根据本发明的另一实施例，第n-1频率与第n频率的差值大于或等于第n频率与第n+1频率的差值。
根据本发明的另一实施例，统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于第一灰阶值的其他像素点的数量包括：
按照预设周期统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于第一灰阶值的其他像素点的数量。
根据本发明的另一实施例，显示驱动方法还可以包括：
设置目标显示器的刷新频率。
以上结合附图详细说明了本发明的技术方案。通过本发明的技术方案，可以在几乎不对用户的观看效果造成影响的情况下，降低显示器的刷新频率，从而降低显示器的功耗。
在本发明中，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。
以上所述仅为本发明的示例性实施例，并不用于限制本发明。对于本领域的技术人员来说，可以对本发明进行各种更改和变化。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (17)

  1. 一种显示驱动装置，包括：统计单元、比较单元和驱动单元，
    所述统计单元配置为统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量；
    所述比较单元配置为比较所述第一像素点的数量和所述其他像素点的数量，如果所述第一像素点的数量大于或等于所述其他像素点的数量，则向所述驱动单元传输第一指令；
    所述驱动单元配置为，如果接收到所述第一指令，则控制所述目标显示器的刷新频率大于或等于第一频率，否则，控制所述目标显示器的刷新频率小于所述第一频率。
  2. 根据权利要求1所述的显示驱动装置，其中，所述统计单元还配置为统计灰阶值小于所述第一灰阶值且大于或等于第二灰阶值的第二像素点的数量，灰阶值小于第二灰阶值且大于或等于第三灰阶值的第三像素点的数量，...，以及灰阶值小于第N-1灰阶值且大于或等于第N灰阶值的第N像素点的数量；
    所述比较单元还配置为比较所述第一至第N像素点的数量，如果在所述第一至第N像素点的数量中第n像素点的数量最大，则向所述驱动单元传输第n指令；
    所述驱动单元还配置为，如果接收到所述第n指令，则控制所述目标显示器以第n频率刷新，其中，n和N为正整数，且1＜n≤N，N＞1，第n-1频率大于第n频率。
  3. 根据权利要求2所述的显示驱动装置，其中，第n-1频率与第n频率的差值大于或等于第n频率与第n+1频率的差值。
  4. 根据权利要求2所述的显示驱动装置，其中，N＝4，所述第一灰阶值大于190且小于200，所述第二灰阶值大于120且小于130，所述第三灰阶值大于60且小于70。
  5. 根据权利要求4所述的显示驱动装置，其中，所述第一灰阶值等于192，所述第二灰阶值等于127，所述第三灰阶值等于63，
    第一刷新频率等于60Hz，第二刷新频率等于50Hz，第三刷新频率等于42Hz，第四刷新频率等于36Hz。
  6. 根据权利要求2所述的显示驱动装置，其中，N＝3，所述第一灰阶值大于190且小于200，所述第二灰阶值大于120且小于130。
  7. 根据权利要求6所述的显示驱动装置，其中，所述第一灰阶值等于192，所述第二灰阶值等于127，
    第一刷新频率等于60Hz，第二刷新频率等于50Hz，第三刷新频率等于42Hz。
  8. 根据权利要求2所述的显示驱动装置，其中，N＝2，所述第一灰阶值大于190且小于200。
  9. 根据权利要求8所述的显示驱动装置，其中，所述第一灰阶值等于192，第一刷新频率等于60Hz。
  10. 根据权利要求1至9中任一项所述的显示驱动装置，其中，所述统计单元按照预设周期统计所述目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量。
  11. 根据权利要求1至9中任一项所述的显示驱动装置，还包括：
    频率选择单元，用于设置所述目标显示器的刷新频率。
  12. 一种显示装置，包括显示面板以及根据权利要求1至11中任一项所述的显示驱动装置。
  13. 一种显示驱动方法，包括：
    统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量；
    比较所述第一像素点的数量和所述其他像素点的数量，如果所述第一像素点的数量大于或等于所述其他像素点的数量，则生成第一指令；
    如果生成所述第一指令，则控制所述目标显示器的刷新频率大于或等于第一频率，否则，控制所述目标显示器的刷新频率小于所述第一频率。
  14. 根据权利要求13所述的显示驱动方法，还包括：
    统计灰阶值小于所述第一灰阶值且大于或等于第二灰阶值的第二像素点的数量，灰阶值小于第二灰阶值且大于或等于第三灰阶值的第三像素点的数量，...，以及灰阶值小于第N-1灰阶值且大于或等于第N灰阶值的第N像素点的数量；
    比较所述第一至第N像素点的数量，如果在所述第一至第N像素点的数量中第n像素点的数量最大，则生成第n指令；
    如果生成所述第n指令，则控制所述目标显示器以第n频率刷新，其中，n和N为正整数，且1＜n≤N，N＞1，第n-1频率大于第n频率。
  15. 根据权利要求14所述的显示驱动方法，其中，第n-1频率与第n频率的差值大于或等于第n频率与第n+1频率的差值。
  16. 根据权利要求13至15中任一项所述的显示驱动方法，其中，所述统计目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量包括：
    按照预设周期统计所述目标显示器显示的图像中灰阶值大于或等于第一灰阶值的第一像素点的数量以及灰阶值小于所述第一灰阶值的其他像素点的数量。
  17. 根据权利要求13至15中任一项所述的显示驱动方法，还包括：
    设置所述目标显示器的刷新频率。
PCT/CN2016/070388 2015-07-21 2016-01-07 显示驱动装置和显示驱动方法以及显示装置 Ceased WO2017012301A1 (zh)

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