WO2017118023A1 - 一种调整屏幕刷新频率的方法和装置以及显示器 - Google Patents

一种调整屏幕刷新频率的方法和装置以及显示器 Download PDF

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Publication number
WO2017118023A1
WO2017118023A1 PCT/CN2016/094853 CN2016094853W WO2017118023A1 WO 2017118023 A1 WO2017118023 A1 WO 2017118023A1 CN 2016094853 W CN2016094853 W CN 2016094853W WO 2017118023 A1 WO2017118023 A1 WO 2017118023A1
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Prior art keywords
screen refresh
refresh frequency
frame picture
picture signal
similarity value
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PCT/CN2016/094853
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English (en)
French (fr)
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王明超
张春兵
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京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Priority to US15/521,228 priority Critical patent/US10140941B2/en
Publication of WO2017118023A1 publication Critical patent/WO2017118023A1/zh

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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
    • G09G3/36—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 using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—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 using liquid crystals
    • 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
    • G09G2320/10—Special adaptations of display systems for operation with variable images
    • G09G2320/103—Detection of image changes, e.g. determination of an index representative of the image change
    • 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
    • G09G2340/00—Aspects of display data processing
    • G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame

Definitions

  • the present invention relates to the field of screen display, and more particularly to a method of adjusting a screen refresh frequency, a device for adjusting a screen refresh frequency, and a display.
  • the contradiction between high quality picture and low power consumption is a problem that is solved in the display field.
  • the conventional technology performs n-frame charging on pixels that do not need to be charged by performing interlaced scanning in one frame, thereby achieving energy saving.
  • the main method is to connect the "AND gate” at the gate end, and control the state of the row and row by pulse control and the state of the gate, thereby achieving the purpose of interlaced scanning.
  • GOA Gate Driver On Array
  • the present invention provides a method of adjusting a screen refresh frequency, an apparatus for adjusting a screen refresh frequency, and a display.
  • One aspect of the present invention provides a method of adjusting a screen refresh frequency, including:
  • a screen refresh frequency for the current frame picture is obtained according to a relationship between the preset similarity value and the screen refresh frequency, thereby implementing adjustment of the screen refresh frequency.
  • calculating the similarity value comprises:
  • the relationship between the preset similarity value and the screen refresh frequency is obtained by:
  • f is the screen refresh frequency
  • S is the similarity value
  • a is the maximum screen refresh frequency - the minimum screen refresh frequency
  • b is the maximum screen refresh frequency
  • the maximum screen refresh frequency is set to a minimum frequency at which the human eye persists.
  • the minimum screen refresh frequency is set to 30 Hz.
  • Another aspect of the present invention provides an apparatus for adjusting a screen refresh frequency, including:
  • a signal acquisition unit configured to acquire a current frame picture signal
  • a storage unit configured to store a current frame picture signal and a previous frame picture signal
  • control unit configured to calculate a similarity value between the current frame picture signal and the previous frame picture signal, and obtain a current frame according to the relationship between the preset similarity value and the screen refresh frequency based on the similarity value The screen refresh rate of the screen, so as to adjust the screen refresh frequency.
  • control unit is configured to:
  • the relationship between the preset similarity value and the screen refresh frequency is obtained by:
  • f is the screen refresh frequency
  • S is the similarity value
  • a is the maximum screen refresh frequency - the minimum screen refresh frequency
  • b is the maximum screen refresh frequency
  • the maximum screen refresh frequency is set to a minimum frequency at which the human eye persists.
  • the minimum screen refresh frequency is set to 30 Hz.
  • a further aspect of the present invention provides a display comprising the above apparatus for adjusting a screen refresh frequency.
  • the display further comprises a timing control unit, a source driving circuit, a gate driving circuit and a display panel, wherein the device for adjusting the screen refresh frequency outputs the screen refreshing frequency for the current frame picture to the timing control unit to pass the source
  • the pole drive circuit and the gate drive circuit control the charging time of the pixels of the display panel.
  • the invention provides a method for adjusting a screen refresh frequency, a device for adjusting a screen refresh frequency, and a display for adjusting a refresh frequency of a screen by comparing similarities between two adjacent frames to reduce power consumption of the electronic device.
  • the method for adjusting a screen refresh frequency of the present invention first calculates a similarity value of two adjacent frames (ie, a current frame picture and a previous frame picture); and then, based on the similarity value, according to a preset similarity value and The relationship between screen refresh rates to adjust the current screen refresh rate.
  • the screen refresh frequency adjustable, the power consumption of the display device can be effectively reduced.
  • TFT-LCD Thin Film Transistor-Liquid Crystal Display
  • FIG. 1 is a flow chart showing a method of adjusting a screen refresh frequency according to an embodiment of the present invention
  • FIG. 2 is a flow chart showing a method of adjusting a screen refresh frequency according to another embodiment of the present invention.
  • FIG. 3 is a diagram showing a relationship between similarity between adjacent two frames of pictures and a screen refresh frequency according to an embodiment of the present invention
  • FIG. 4 is a block diagram showing an apparatus for adjusting a screen refresh frequency according to an embodiment of the present invention
  • FIG. 5 is a block diagram showing a display in accordance with an embodiment of the present invention.
  • Figure 1 is a flow chart illustrating a method 100 of adjusting a screen refresh frequency in accordance with an embodiment of the present invention.
  • the current frame picture signal is acquired and stored.
  • step 102 calculating a similarity value between the current frame picture signal and the previous frame picture signal
  • step 103 based on the similarity value, the screen refresh frequency for the current frame picture is obtained according to the relationship between the preset similarity value and the screen refresh frequency, thereby realizing the adjustment of the screen refresh frequency.
  • FIGS. 2 and 3 are flow charts showing a method 200 of adjusting a screen refresh frequency according to another embodiment of the present invention
  • FIG. 3 is a diagram showing similarity and screen refresh between adjacent two frames according to an embodiment of the present invention. A diagram of the relationship between frequencies.
  • the current frame picture signal is acquired and stored.
  • the current frame picture signal may be acquired frame by frame during the display process, or the current frame picture signal may be acquired periodically or at irregular time intervals, and the present invention is not limited thereto.
  • the acquired current frame picture signal is stored in a storage unit.
  • the previous frame picture signal may also be stored in the storage unit in advance or in another storage unit.
  • adjacent two frames of pictures in the present application means that the two frames of pictures may be in close proximity, or may be spaced apart by several frames (for example, 1 frame, 2 frames, or 3 frames), as long as the frames between the two frames can be Similarity can be used to reflect the rate of change of the displayed picture.
  • the previous frame picture signal may be a frame picture signal immediately before the current frame picture signal, or may be a frame picture signal of a certain number of frames (for example, 2 frames or 3 frames) from the current frame.
  • the technician can set it according to the actual situation.
  • a bitwise exclusive OR operation is performed on the current frame picture signal and the previous frame picture signal.
  • the frame picture signal can be represented by a series of binary numbers.
  • 0 means the same, and 1 means the difference.
  • the screen refresh frequency for the current frame picture is obtained according to the relationship between the preset similarity value and the screen refresh frequency.
  • the relationship between the preset similarity value and the screen refresh rate can be obtained by:
  • f is the screen refresh frequency
  • S is the similarity value
  • a is the maximum screen refresh frequency - the minimum screen refresh frequency
  • b is the maximum screen refresh frequency
  • the current frame picture signal can be used as the "previous frame picture signal" in the next operation after the following operations are completed.
  • the size of the screen refresh rate is determined by the similarity between two adjacent frames.
  • the refresh rate of the current frame picture is determined by the similarity between the current frame picture and the previous frame picture.
  • the similarity between the current frame picture and the previous frame picture is high, the screen refresh frequency f can be adjusted to be small, so that the power consumption of the electronic device can be reduced.
  • the adjustment of the refresh frequency of the screen can be realized, so as to solve the problem that the screen refresh frequency of the display product is not adjustable and the power consumption of the electronic device is high.
  • the maximum screen refresh frequency is set, for example, to the minimum frequency of the persistence of the human eye, and the minimum screen refresh frequency is set, for example, to 30 Hz.
  • the control unit 404 can obtain a screen refresh frequency for the current frame picture according to the above relationship based on the similarity value.
  • the screen refresh frequency value is between the maximum and minimum screen refresh frequencies, and also depends on the similarity value S between adjacent frame pictures.
  • the similarity value S is between 0 and 1.
  • the ratio of the number A of 1 and the total number B of 0 and 1 in the XOR operation result can also be calculated as the similarity value S.
  • the larger the similarity value S the lower the similarity between the current frame picture and the previous frame picture.
  • the relationship between the preset similarity value and the screen refresh frequency is adjusted accordingly, and the control of the screen refresh frequency is realized.
  • the method 200 for adjusting the screen refresh frequency in this embodiment compares the similarity between two adjacent frames, and adjusts the screen refresh frequency according to the relationship between the similarity of the adjacent two frames and the screen refresh frequency. Therefore, the problem that the screen refresh frequency of the display product is not adjustable and the power consumption of the electronic device is high is solved.
  • the device 400 includes a signal acquisition unit 401, a storage unit 402, a control unit 404, and an amplification unit 405.
  • the signal acquisition unit 401 acquires a current frame picture signal.
  • the storage unit 402 stores the acquired current frame picture signal and the previous frame picture signal.
  • the storage unit 402 can include a first storage unit 402A and a second storage unit 402B.
  • the current frame picture signal and the previous frame picture signal can be stored in the first storage unit 402A and the second storage unit 402B, respectively.
  • the current frame picture signal and the previous frame picture signal may also be stored in the first storage unit 402A or the second storage unit 402B, which is not limited by the present invention.
  • the control unit 404 calculates a similarity value between the current frame picture signal and the previous frame picture signal, and obtains, according to the relationship between the preset similarity value and the screen refresh frequency, the current frame picture based on the similarity value. Screen refresh rate.
  • the current frame picture signal may be acquired frame by frame during the display process, or the current frame picture signal may be acquired periodically or at irregular time intervals, and the present invention is not limited thereto.
  • the control unit 404 first performs a bitwise exclusive OR operation on the current frame picture signal and the previous frame picture signal.
  • the frame picture signal is represented by a series of binary numbers.
  • 0 means the same
  • 1 means the difference.
  • f is the screen refresh frequency
  • S is the similarity value
  • a is the maximum screen refresh frequency - the minimum screen refresh frequency
  • b is the maximum screen refresh frequency
  • the size of the screen refresh rate is determined by the similarity between two adjacent frames.
  • the refresh rate of the current frame picture is determined by the similarity between the current frame picture and the previous frame picture.
  • the similarity between the current frame picture and the previous frame picture is high, the screen refresh frequency f can be adjusted to be small, so that the power consumption of the electronic device can be reduced.
  • the adjustment of the screen refresh frequency can be realized, so as to solve the problem that the screen refresh frequency of the display product is not adjustable and the power consumption of the electronic device is high.
  • the maximum screen refresh frequency is set, for example, to the minimum frequency of the persistence of the human eye, and the minimum screen refresh frequency is set, for example, to 30 Hz.
  • the control unit 404 obtains the needle based on the similarity value based on the above relationship
  • the screen refresh rate of the current frame picture ie, the adjusted screen refresh rate).
  • control unit 404 can also calculate the ratio of the number A of 1 and the total number B of 0 and 1 in the result of the exclusive OR operation as the similarity value S.
  • the similarity value S the smaller the similarity value S, the lower the similarity between the current frame picture and the previous frame picture.
  • the relationship between the preset similarity value and the screen refresh frequency is adjusted accordingly, and the control of the screen refresh frequency is realized.
  • the amplifying unit 405 amplifies the screen refresh frequency for the current frame picture by the control unit 404, and outputs it to control the output refresh frequency of the Timing Controller (TCON).
  • TCON Timing Controller
  • FIG. 5 is a block diagram showing a display 500 in accordance with an embodiment of the present invention.
  • the display 500 includes the above-described means for adjusting the screen refresh frequency, a timing control unit (TCON) 2, a source driving circuit 3, a display panel 4, and a gate driving circuit 5.
  • TCON timing control unit
  • source driving circuit 3 a display panel 4
  • gate driving circuit 5 a gate driving circuit 5.
  • the apparatus 1 for adjusting the screen refresh frequency can receive the frame picture signal and then output the screen refresh frequency to frequency-convert the synchronization signal output by the TCON 2 so that the TCON 2 outputs a suitable frequency for the current frame picture (screen for the current frame picture signal) Refresh frequency).
  • This suitable frequency controls the charging time of the pixels of the display panel 4 through the source driving circuit 3 and the gate driving circuit 5. Thereby, the power consumption of the display device is reduced while achieving high picture quality.
  • some implementations may be in the form of hardware, such as for operation on a device or combination of devices, while other embodiments may be in the form of software and/or firmware.
  • some embodiments may include one or more items, such as a storage medium or storage medium.
  • a storage medium such as a CD-ROM, a computer disk, a flash memory, or the like, on which instructions can be stored, which, when executed by a system such as a computer system, computing platform, or other system, can cause the processor to be based on the claimed subject matter. Executing, for example, one of the above embodiments.
  • the computing platform can include one or more processing units or processors, one or more input/output devices (eg, display, keyboard, and/or mouse), and one or more memories (eg, static random access memory) , dynamic random access memory, flash memory, and/or hard drive).

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Abstract

一种调整屏幕刷新频率的方法和装置以及一种显示器。该方法包括：获取并存储当前帧画面信号（101）；计算当前帧画面信号与前一帧画面信号之间的相似性值（102）；以及基于所述相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来获得针对当前帧画面信号的屏幕刷新频率（103）。通过使得屏幕刷新频率变得可调，有效地降低显示设备的功耗，这对于提升显示产品的品质和竞争性具有重大推动作用。

Description

一种调整屏幕刷新频率的方法和装置以及显示器
本申请要求于2016年1月5日递交的中国专利申请201610004902.1的优先权，该申请合并在此作为引用。
技术领域
本发明涉及屏幕显示领域，更具体地，涉及一种调整屏幕刷新频率的方法、一种调整屏幕刷新频率的装置，以及一种显示器。
背景技术
高品质画面与低功耗的矛盾是显示领域内致力解决的一个问题。传统技术通过在一帧画面内进行隔行扫描，对不需要充电的像素进行n帧一次充电，进而达到节能的目的。主要的手段在于在栅极端接入“与门”，通过脉冲控制与门的状态，从而实现对行与行的开关状态进行控制，进而达到隔行扫描的目的。目前由于显示行业产品向阵列基板行驱动(Gate Driver On Array，GOA)方向发展，因此在制造GOA时需要在阵列上制作“与门”，因此工艺变得复杂，不利于产品生产及良率提高。
因此，如何确保高画面品质及低功耗达到一种最优化状态是本领域亟待解决的技术问题。
发明内容
本发明提供了一种调整屏幕刷新频率的方法、一种调整屏幕刷新频率的装置，以及一种显示器。
本发明的一个方面提供了一种调整屏幕刷新频率的方法，包括：
获取并存储当前帧画面信号；
计算当前帧画面信号与先前帧画面信号之间的相似性值；以及
基于所述相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来获得针对当前帧画面的屏幕刷新频率，从而实现屏幕刷新频率的调整。
优选地，计算所述相似性值包括：
对当前帧画面信号和先前帧画面信号执行按位异或运算，并计算异或运算结果中0的个数与0和1的总个数的比值，作为当前帧画面信号与先前帧画面信号之间的相 似性值。
优选地，由下式得到所述预设的相似性值与屏幕刷新频率之间的关系：
f＝-a*S+b，
其中，f为屏幕刷新频率，S是相似性值，a为最大屏幕刷新频率-最小屏幕刷新频率，b为最大屏幕刷新频率。
优选地，所述最大屏幕刷新频率设置为人眼视觉暂留的最小频率。
优选地，所述最小屏幕刷新频率设置为30Hz。
本发明的另一方面提供了一种调整屏幕刷新频率的装置，包括：
信号获取单元，配置为获取当前帧画面信号；
存储单元，配置为存储当前帧画面信号和先前帧画面信号；
控制单元，配置为计算当前帧画面信号与先前帧画面信号之间的相似性值，以及基于所述相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来获得针对当前帧画面的屏幕刷新频率，从而实现屏幕刷新频率的调整。
优选地，所述控制单元配置为：
对当前帧画面信号和先前帧画面信号执行按位异或运算，并计算异或运算结果中0的个数与0和1的总个数的比值，作为当前帧画面信号与先前帧画面信号之间的相似性值。
优选地，由下式得到所述预设的相似性值与屏幕刷新频率之间的关系：
f＝-a*S+b，
其中，f为屏幕刷新频率，S是相似性值，a为最大屏幕刷新频率-最小屏幕刷新频率，b为最大屏幕刷新频率。
优选地，所述最大屏幕刷新频率设置为人眼视觉暂留的最小频率。
优选地，最小屏幕刷新频率设置为30Hz。
本发明的再一方面提供了一种显示器，包括上述调整屏幕刷新频率的装置。
优选地，所述显示器还包括定时控制单元、源极驱动电路、栅极驱动电路以及显示面板，其中调整屏幕刷新频率的装置将针对当前帧画面的屏幕刷新频率输出给定时控制单元，以通过源极驱动电路和栅极驱动电路控制显示面板的像素的充电时间。
本发明提出一种调整屏幕刷新频率的方法、一种调整屏幕刷新频率装置，以及一种显示器，通过比较相邻两帧画面的相似性进而调整屏幕的刷新频率，以便降低电子设备的功耗。具体地，本发明的调整屏幕刷新频率的方法首先计算相邻两帧画面(即，当前帧画面和先前帧画面)的相似性值；然后基于该相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来调整当前屏幕刷新频率。通过使得屏幕刷新频率变得可调，可以有效地降低显示设备的功耗。尤其是在利用薄膜晶体管-液晶显示器(Thin Film Transistor-Liquid crystal display，TFT-LCD)播放动态画面时，通过调整屏幕刷新频率不仅能够获得高品质的画面，更能降低功耗。
附图说明
根据结合附图的以下详细描述，本发明的多个实施例的上述和其他方面、特征以及优点将更清楚，在附图中：
图1是示出了根据本发明实施例的调整屏幕刷新频率的方法的流程图；
图2是示出了根据本发明另一实施例的调整屏幕刷新频率的方法的流程图；
图3是示出了根据本发明实施例的相邻两帧画面之间的相似性与屏幕刷新频率之间的关系图；
图4是示出了根据本发明实施例的调整屏幕刷新频率的装置的框图；以及
图5是示出了根据本发明实施例的显示器的框图。
应当理解，所有附图中相同或相似的附图标记指示相同或相似元件、特征和结构。
具体实施方式
以下参照附图，对本发明的示例实施例进行详细描述。在以下描述中，一些具体实施例仅用于描述目的，而不应该理解为对本发明有任何限制，而只是本发明的示例。在可能导致对本发明的理解造成混淆时，将省略常规结构或构造。
参照图1，图1是示出了根据本发明实施例的调整屏幕刷新频率的方法100的流程图。
在步骤101，获取并存储当前帧画面信号。
在步骤102，计算当前帧画面信号与先前帧画面信号之间的相似性值；以及
在步骤103，基于相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来获得针对当前帧画面的屏幕刷新频率，从而实现屏幕刷新频率的调整。
下面结合图2和图3具体描述根据本发明实施例的调整屏幕刷新频率的方法。图2是示出了根据本发明另一实施例的调整屏幕刷新频率的方法200的流程图；图3是示出了根据本发明实施例的相邻两帧画面之间的相似性与屏幕刷新频率之间的关系图。
如图2所示，在步骤201，获取并存储当前帧画面信号。例如，可以在显示过程中，逐帧获取当前帧画面信号，也可以按照恒定的时间间隔周期性地，也可以不定期地获取当前帧画面信号，本发明并不局限于此。将该获取的当前帧画面信号存储在一存储单元中。可以预先将先前帧画面信号也存储在该存储单元中，或者存储在另一存储单元中。应注意，本申请中的术语“相邻两帧画面”表示这两帧画面可以紧邻，也可以间隔数帧(例如间隔1帧、2帧或3帧)，只要能够这两帧画面之间的相似性可用于反映所显示画面的变化率即可。本领域技术人员可以理解，该先前帧画面信号可以是紧邻当前帧画面信号之前的帧画面信号，也可以是与当前帧相距特定帧数(例如2帧或3帧)的帧画面信号，本领域技术人员可以根据实际情况进行设置。
在步骤202，对当前帧画面信号和先前帧画面信号执行按位异或运算。这里帧画面信号可以由一系列二进制数表示。示例地，在按位异或运算的结果中，0表示相同，而1表示不同。
在步骤203，计算异或运算结果中0的个数与0和1的总个数的比值，作为当前帧画面信号与先前帧画面信号之间的相似性值。例如，假定异或运算结果中0的个数为A，0和1的总个数为B，则相似性值S＝A/B。此时，相似性值越大，表示当前帧画面与先前帧画面之间的相似性越高。相似性值越小，表示当前帧画面与先前帧画面之间的相似性越低。
在步骤204，基于相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来获得针对当前帧画面的屏幕刷新频率。可以由下式得到预设的相似性值与屏幕刷新频率之间的关系：
f＝-a*S+b，
其中，f为屏幕刷新频率，S是相似性值，a为最大屏幕刷新频率-最小屏幕刷新频率，b为最大屏幕刷新频率。
应注意，当完成以下操作之后，可以将当前帧画面信号用作下一次操作中的“先前帧画面信号”。
屏幕刷新频率的大小由相邻两帧画面之间的相似性来决定。例如，当前帧画面的刷新频率由当前帧画面与先前帧画面的相似性决定。如图3所示，相似性越大，屏幕刷新频率f可以越小；反之，相似性越小，屏刷新频率f可以越大。这样如果当前帧画面与先前帧画面的相似性高，那么可以将屏幕刷新频率f调小，从而可以降低电子设备的功耗。通过获得相邻两帧画面的相似性使得可以实现对屏幕的刷新频率的调整，以解决显示产品的屏幕刷新频率不可调而导致电子设备的功耗较高的问题。
在本实施例中，最大屏幕刷新频率例如设置为人眼视觉暂留的最小频率，最小屏幕刷新频率例如设置为30Hz。控制单元404可以基于相似性值，根据上述关系，得到针对当前帧画面的屏幕刷新频率。
在实际工作中，屏幕刷新频率值介于最大和最小屏幕刷新频率之间，而同时也取决于相邻帧画面之间的相似性值S。在本实施例中，相似性值S介于0～1之间。作为示例，假定最大屏幕刷新频率为60Hz，最小屏幕刷新频率为30Hz，因此屏幕刷新频率的变化范围是30～60Hz，即a＝60Hz-30Hz＝30Hz。实际工作时如果两帧画面完全相同，则S为1，从而f＝-30Hz*1+60Hz＝30Hz。此时采用最小屏幕刷新频率；如果两帧画面相似性值为0.8，则f＝-30Hz*0.8+60Hz＝36Hz，此时屏幕刷新频率为36Hz；如果两帧画面完全不同，则S＝0，从而f＝-30Hz*0+60Hz＝60Hz，此时采用最大屏幕刷新频率。
类似地，也可以计算异或运算结果中1的个数A与0和1的总数B的比值，作为相似性值S。此时，相似性值S越大，表示当前帧画面与先前帧画面之间的相似性越低。同时相应地调整预先设置的相似性值与屏幕刷新频率之间的关系，实现对屏幕刷新频率的控制。
本实施例中的调整屏幕刷新频率的方法200通过比较相邻两帧画面的相似性，并根据预先设置的相邻两帧画面的相似性与屏幕刷新频率之间的关系来调整屏幕刷新频率，从而解决了显示产品的屏幕刷新频率不可调而导致电子设备的功耗较高的问题。
图4是示出了根据本发明实施例的调整屏幕刷新频率的装置400的框图。装置400包括信号获取单元401、存储单元402、控制单元404以及放大单元405。
信号获取单元401获取当前帧画面信号。
存储单元402存储获取的当前帧画面信号以及先前帧画面信号。存储单元402可以包括第一存储单元402A和第二存储单元402B。本领域技术人员可以理解，可以分别将当前帧画面信号和先前帧画面信号存储在第一存储单元402A和第二存储单元402B。也可以将当前帧画面信号和先前帧画面信号均存储在第一存储单元402A或第二存储单元402B中，本发明并不对此进行限制。
控制单元404计算当前帧画面信号与先前帧画面信号之间的相似性值，以及基于所述相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来获得针对当前帧画面的屏幕刷新频率。
例如，可以在显示过程中，逐帧获取当前帧画面信号，也可以按照恒定的时间间隔周期性地，也可以不定期地获取当前帧画面信号，本发明并不局限于此。
在本实施例中，控制单元404首先对当前帧画面信号和先前帧画面信号执行按位异或运算。这里帧画面信号由一系列二进制数表示。示例地，在按位异或运算的结果中，0表示相同，而1表示不同。然后，控制单元404计算异或运算结果中0的个数与0和1的总个数的比值，作为当前帧画面信号与先前帧画面信号之间的相似性值。例如，假定异或运算结果中0的个数为A，0和1的总个数为B，则相似性值S＝A/B。此时，相似性值越大，表示当前帧画面与先前帧画面之间的相似性越高。相似性值越小，表示当前帧画面与先前帧画面之间的相似性越低。
由以下公式预设所述相似性值与屏幕刷新频率之间的关系：
f＝-a*S+b，
其中，f为屏幕刷新频率，S是相似性值，a为最大屏幕刷新频率-最小屏幕刷新频率，b为最大屏幕刷新频率。
屏幕刷新频率的大小由相邻两帧画面之间的相似性来决定。例如，当前帧画面的刷新频率由当前帧画面与先前帧画面的相似性决定。如图3所示，相似性越大，屏幕刷新频率f越小；反之，相似性越小，屏刷新频率f越大。这样如果当前帧画面与先前帧画面的相似性高，那么可以将屏幕刷新频率f调小，从而可以降低电子设备的功耗。通过获得相邻两帧画面的相似性使得可以实现对屏幕刷新频率的调整，以解决显示产品的屏幕刷新频率不可调而导致电子设备的功耗较高的问题
在本实施例中，最大屏幕刷新频率例如设置为人眼视觉暂留的最小频率，最小屏幕刷新频率例如设置为30Hz。控制单元404基于相似性值，根据上述关系，得到针 对当前帧画面的屏幕刷新频率(即，调整后的屏幕刷新频率)。
类似地，控制单元404也可以计算异或运算结果中1的个数A与0和1的总数B的比值，作为相似性值S。此时，相似性值S越大，表示当前帧画面与先前帧画面之间的相似性越低。同时相应地调整预先设置的相似性值与屏幕刷新频率之间的关系，实现对屏幕刷新频率的控制。
可选地，放大单元405对控制单元404得到针对当前帧画面的屏幕刷新频率进行放大，并输出，以控制定时控制单元(Timing Controller，TCON)的输出刷新频率。
图5是示出了根据本发明实施例的显示器500的框图。显示器500包括上述调整屏幕刷新频率的装置1、定时控制单元(TCON)2、源极驱动电路3、显示面板4以及栅极驱动电路5。
调整屏幕刷新频率的装置1可以接收帧画面信号，然后输出屏幕刷新频率，以对TCON 2输出的同步信号进行变频，使得TCON 2输出针对当前帧画面的适合的频率(针对当前帧画面信号的屏幕刷新频率)。该适合的频率通过源极驱动电路3和栅极驱动电路5控制显示面板4的像素的充电时间。从而在实现高画面品质的同时降低了显示设备的功耗。
应注意，本发明要求保护的主题内容在范围上不限于本文描述的具体实施方式。例如，一些实施方式可以是硬件形式，例如用于在设备或设备的组合上操作，而其他实施方式可以是软件和/或固件形式。类似地，虽然在这方面要求保护的主题内容在范围上不受限，但是一些实施方式可以包括一个或多个物品，例如存储介质或存储媒介。存储介质例如CD-ROM、计算机盘、闪速存储器等，其上可以存储有指令，当由计算机系统、计算平台或其他系统之类的系统执行时，可以使处理器根据要求保护的主题内容来执行，例如上述实施方式之一。一个可能方式是计算平台可以包括一个或多个处理单元或处理器、一个或多个输入/输出设备(例如显示器、键盘和/或鼠标)、以及一个或多个存储器(例如静态随机存取存储器、动态随机存取存储器、闪速存储器、和/或硬驱)。
此外，还应当注意的是，在以上的描述中，仅以示例的方式，示出了本发明的技术方案，但并不意味着本发明局限于上述步骤和结构。在可能的情形下，可以根据需要对步骤和结构进行调整和取舍。因此，某些步骤和单元并非实施本发明的总体发明思想所必需的元素。因此，本发明所必需的技术特征仅受限于能够实现本发明的总体 发明思想的最低要求，而不受以上具体实例的限制。
显然，本领域的技术人员可以在不脱离本发明的精神和范围的前提下对本发明的实施例进行各种改变和修改。本发明的范围由所附权利要求及其等同物来限定。

Claims (12)

  1. 一种调整屏幕刷新频率的方法，包括：
    获取并存储当前帧画面信号；
    计算当前帧画面信号与先前帧画面信号之间的相似性值；以及
    基于所述相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来获得针对当前帧画面信号的屏幕刷新频率，从而实现屏幕刷新频率的调整。
  2. 根据权利要求1所述的方法，其中，计算所述相似性值包括：
    对当前帧画面信号和先前帧画面信号执行按位异或运算，并计算异或运算结果中0的个数与0和1的总个数的比值，作为当前帧画面信号与先前帧画面信号之间的相似性值。
  3. 根据权利要求1所述的方法，其中，由下式得到所述预设的相似性值与屏幕刷新频率之间的关系：
    f＝-a*S+b，
    其中，f为屏幕刷新频率，S是相似性值，a为最大屏幕刷新频率-最小屏幕刷新频率，b为最大屏幕刷新频率。
  4. 根据权利要求3所述的方法，其中，所述最大屏幕刷新频率设置为人眼视觉暂留的最小频率。
  5. 根据权利要求3或4所述的方法，其中，所述最小屏幕刷新频率设置为30Hz。
  6. 一种调整屏幕刷新频率的装置，包括：
    信号获取单元，配置为获取当前帧画面信号；
    存储单元，配置为存储当前帧画面信号和先前帧画面信号；
    控制单元，配置为计算当前帧画面信号与先前帧画面信号之间的相似性值，以及基于所述相似性值，根据预设的相似性值与屏幕刷新频率之间的关系来获得针对当前帧画面的屏幕刷新频率，从而实现屏幕刷新频率的调整。
  7. 根据权利要求6所述的装置，其中，所述控制单元配置为：
    对当前帧画面信号和先前帧画面信号执行按位异或运算，并计算异或运算结果中0的个数与0和1的总个数的比值，作为当前帧画面信号与先前帧画面信号之间的相似性值。
  8. 根据权利要求6所述的装置，其中，由下式得到所述预设的相似性值与屏幕刷新频率之间的关系：
    f＝-a*S+b，
    其中，f为屏幕刷新频率，S是相似性值，a为最大屏幕刷新频率-最小屏幕刷新频率，b为最大屏幕刷新频率。
  9. 根据权利要求8所述的装置，其中，所述最大屏幕刷新频率设置为人眼视觉暂留的最小频率。
  10. 根据权利要求8或9所述的装置，其中，最小屏幕刷新频率设置为30Hz。
  11. 一种显示器，包括根据权利要求6至10中任一项所述的调整屏幕刷新频率的装置。
  12. 根据权利要求11所述的显示器，还包括：定时控制单元、源极驱动电路、栅极驱动电路以及显示面板，其中
    所述调整屏幕刷新频率的装置将针对当前帧画面的屏幕刷新频率输出给定时控制单元，以通过源极驱动电路和栅极驱动电路控制显示面板的像素的充电时间。
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