WO2016150004A1 - 一种对oled显示器的待显示画面进行处理的设备和方法 - Google Patents

一种对oled显示器的待显示画面进行处理的设备和方法 Download PDF

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Publication number
WO2016150004A1
WO2016150004A1 PCT/CN2015/079510 CN2015079510W WO2016150004A1 WO 2016150004 A1 WO2016150004 A1 WO 2016150004A1 CN 2015079510 W CN2015079510 W CN 2015079510W WO 2016150004 A1 WO2016150004 A1 WO 2016150004A1
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block
grayscale
value
adjacent
grayscale value
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PCT/CN2015/079510
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English (en)
French (fr)
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郭平昇
朱立伟
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深圳市华星光电技术有限公司
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Priority to US14/889,936 priority Critical patent/US9767723B2/en
Publication of WO2016150004A1 publication Critical patent/WO2016150004A1/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
    • G09G3/2007—Display of intermediate tones
    • 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
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G3/2003—Display of colours
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • 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
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • 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 generally relates to the field of image processing. More particularly, it relates to an apparatus and method for processing a picture to be displayed of an OLED display.
  • OLED Organic Light Emitting Diode
  • OLED display technology has self-luminous properties, using a very thin coating of organic materials and a glass substrate that emits light when current is passed through it. Since OLEDs do not require a backlight, they can self-illuminate. At the same time, OLEDs have excellent contrast, thin thickness, wide viewing angle, fast response, flexible panels, wide temperature range, relatively simple structure and relatively simple process. OLED displays have very good application prospects. At present, OLED displays have problems such as short service life, high cost, and insufficient color purity. They have not been widely recognized by the market and are only used in small-sized portable devices.
  • an object of the present invention is to provide an apparatus and method for processing a picture to be displayed of an OLED display to improve the service life of the OLED display.
  • An aspect of an exemplary embodiment of the present invention provides an apparatus for processing a picture to be displayed of an OLED display, including: a block dividing unit that divides a picture to be displayed into a plurality of blocks; an average grayscale value determining unit that determines each An average grayscale value of the block; a high grayscale block determining unit that determines a block whose average grayscale value is greater than a predetermined threshold as a high grayscale block; and a neighboring grayscale value determining unit to determine a neighboring grayscale value of each high grayscale block Wherein the neighboring grayscale value of any one of the high grayscale blocks is a weighted sum of the average grayscale values of all adjacent high grayscale blocks, the adjacent high grayscale block being adjacent to the high grayscale block Grayscale block In the whole unit, the grayscale value of the pixel of each high grayscale block is adjusted according to the adjacent grayscale value of each high grayscale block.
  • the average grayscale value determining unit may determine an average grayscale value of any one block by the following calculation formula:
  • AVE_BLK represents the average grayscale value of a block
  • N represents the number of a block of pixels
  • R k represents a gray level value of the red component of the pixel in the N pixels of the k-th
  • G k represents N
  • Bk represents the grayscale value of the blue component of the kth pixel in the N pixels
  • ⁇ , ⁇ , and ⁇ represent R k , G k
  • the weight of the adjacent high gray level block having a longer boundary with the one higher gray scale block is larger.
  • the adjusting unit may adjust a grayscale value of each color component of a pixel of each high grayscale block by using an adjustment coefficient corresponding to a neighboring grayscale value of each high grayscale block, wherein the proximity The larger the grayscale value, the smaller the adjustment factor corresponding to it.
  • Another aspect of an exemplary embodiment of the present invention provides a method of processing a picture to be displayed of an OLED display, comprising: (a) dividing a picture to be displayed into a plurality of blocks; and (b) determining an average gray of each block (c) determining a block whose average grayscale value is greater than a predetermined threshold as a high grayscale block; (d) determining a neighboring grayscale value of each high grayscale block, wherein adjacent gray of any high grayscale block The order value is a weighted sum of average gray scale values of all adjacent high gray scale blocks, the adjacent high gray scale blocks being high gray scale blocks adjacent to the one high gray level block; (e) according to each high gray The grayscale values of the adjacent blocks of the order block adjust the grayscale values of the pixels of each high grayscale block.
  • step (b) of the method the average grayscale value of any one block can be determined by the following calculation formula:
  • AVE_BLK represents the average grayscale value of a block
  • N represents the number of a block of pixels
  • R k represents a gray level value of the red component of the pixel in the N pixels of the k-th
  • G k represents N
  • Bk represents the grayscale value of the blue component of the kth pixel in the N pixels
  • ⁇ , ⁇ , and ⁇ represent R k , G k
  • step (d) of the method When the weighted sum is calculated in step (d) of the method, the weight of the adjacent high gray level block having a longer boundary with the one higher gray level block is larger.
  • step (e) may include adjusting grayscale values of respective color components of pixels of each high grayscale block by using an adjustment coefficient corresponding to a neighboring grayscale value of each high grayscale block, wherein The larger the adjacent gray scale value, the smaller the adjustment coefficient corresponding thereto.
  • adjustment of a grayscale value is performed in units of blocks, in units of the entire display screen in the prior art.
  • the brightness and temperature of the OLED display when displaying the display screen can be more accurately adjusted, so that the service life of the OLED can be more effectively improved.
  • the grayscale value of the block adjacent thereto is also considered, which helps to more accurately adjust the brightness and temperature of the OLED display when displaying the display screen.
  • the difference in luminous efficiency of different color components in the pixel and the difference in transmittance are also considered, which also helps to more accurately adjust the display of the display screen of the OLED display.
  • the brightness and temperature can further increase the lifetime of the OLED. Additional aspects and/or advantages of the invention will be set forth in part in the description.
  • FIG. 1 is a block diagram showing an apparatus for processing a picture to be displayed of an OLED display according to an exemplary embodiment of the present invention
  • FIG. 2 is a diagram showing calculation of weights of neighboring grayscale values, according to an exemplary embodiment of the present invention. example;
  • FIG. 3 is a diagram showing an example of a neighboring gray scale block according to an exemplary embodiment of the present invention.
  • FIG. 4 is a flowchart illustrating a method of processing a picture to be displayed of an OLED display, according to an exemplary embodiment of the present invention.
  • FIG. 1 is a block diagram illustrating an apparatus for processing a picture to be displayed of an OLED display, according to an exemplary embodiment of the present invention.
  • the device is to be processed by the device before the OLED display displays the image to be displayed. After the process is completed, the OLED display displays the processed image to be displayed.
  • An apparatus for processing a picture to be displayed of an OLED display includes: a block dividing unit 10, an average grayscale value determining unit 20, a high grayscale block determining unit 30, and a neighboring grayscale value determining unit 40. And adjustment unit 50.
  • These units can be implemented by a general-purpose hardware processor such as a digital signal processor, a field programmable gate array, or a dedicated hardware processor such as a dedicated chip, or can be implemented entirely by a computer program, such as image processing software. .
  • the block dividing unit 10 divides a picture to be displayed into a plurality of blocks.
  • the plurality of blocks may be blocks of any shape, such as blocks that may be rectangular or square. In order to facilitate subsequent calculations, square blocks are preferred.
  • the average grayscale value determining unit 20 determines an average grayscale value of each block.
  • the average grayscale value of any one block indicates the average of the grayscale values of all pixels of the one block.
  • the average grayscale value of any one block indicates a weighted average of the grayscale values of all pixels of the one block.
  • the average grayscale value determining unit 20 may determine the average grayscale value of any one block by the following formula (1):
  • AVE_BLK represents the average grayscale value of a block
  • N represents the number of a block of pixels
  • R k represents a gray level value of the red component of the pixel in the N pixels of the k-th
  • G k represents N
  • Bk represents the grayscale value of the blue component of the kth pixel in the N pixels
  • ⁇ , ⁇ , and ⁇ represent R k , G k
  • the value of ⁇ is set.
  • the magnitude relationship of ⁇ , ⁇ , and ⁇ is set according to the difference in luminous efficiency and the difference in transmittance between different color components (red, blue, and green) on the OLED display. Specifically, considering the order of the luminous efficiency of the different color components (red, blue, and green) and the order of the transmittance are: the green component is larger than the red component, and the red component is greater than the blue component, in the present invention.
  • the magnitude relationship of ⁇ , ⁇ , and ⁇ is set to ⁇ ⁇ ⁇ ⁇ ⁇ .
  • the high grayscale block determining unit 30 determines a block whose average grayscale value is greater than a predetermined threshold as a high grayscale block.
  • the predetermined threshold may be set.
  • the high grayscale block determining unit 30 may also identify blocks determined to be high grayscale blocks for subsequent processing.
  • the adjacent grayscale value determining unit 40 determines the neighboring grayscale values of each of the high grayscale blocks.
  • the neighboring grayscale value of any one of the high grayscale blocks is a weighted sum of average grayscale values of pixels of all adjacent high grayscale blocks, the adjacent high grayscale block being adjacent to the one high grayscale block High grayscale block.
  • the adjacent high gray level block includes a high gray level block having a common side or a common point with the one high gray level block.
  • the neighboring grayscale value determining unit 40 may determine the neighboring grayscale value of each of the high grayscale blocks by setting the weights of the respective adjacent high grayscale blocks in advance.
  • FIG. 2 illustrates one example of calculating weights of neighboring grayscale values, according to an exemplary embodiment of the present invention.
  • FIG. 3 illustrates one example of a neighboring grayscale block in accordance with an exemplary embodiment of the present invention.
  • the weights of each adjacent high gray level block are arranged in the same arrangement as the corresponding adjacent gray level block in FIG. 3, for example, indicating the adjacent gray level block block located in the upper left corner of FIG. 3 (i- The weight of 1, j-1) (ie +1) is located in the upper left corner of Figure 2.
  • the weight of each adjacent high gray level block can be set as in the example shown in FIG. 2.
  • 3 shows a high grayscale block block (i, j) of the i-th column and the j-th row in the picture to be displayed and a block adjacent thereto, wherein the white square 1 represents a high gray level block, and the black square 2 represents a non- A high grayscale block whose adjacent high grayscale blocks include block(i-1,j-1), block(i+1,j-1), block(i+1,j),block(i-1,j +1), block(i, j+1).
  • the neighboring grayscale value of the high grayscale block block(i,j) can be calculated by the following formula (2):
  • Weigh_sum(i,j) represents the adjacent grayscale value of the high grayscale block block(i,j), AVE_BLK(i-1,j-1), AVE_BLK(i+1,j-1), AVE_BLK(i +1, j), AVE_BLK(i-1, j+1), AVE_BLK(i, j+1) are respectively adjacent to the high grayscale block: block(i-1, j-1), block(i+1, The average grayscale value of j-1), block(i+1,j), block(i-1,j+1), block(i,j+1).
  • the adjusting unit 50 adjusts the grayscale value of the pixel of each high grayscale block according to the adjacent grayscale value of each high grayscale block. Specifically, the adjusting unit 50 adjusts grayscale values of respective components of all pixels in each high grayscale block according to neighboring grayscale values of each high grayscale block, including: grayscale value of the red component, blue The grayscale value of the color component and the grayscale value of the green component. As an example, the adjusting unit 50 may adjust a grayscale value of each color component of a pixel of each high grayscale block by using an adjustment coefficient corresponding to a neighboring grayscale value of each high grayscale block, wherein the adjacent grayscale The larger the value, the smaller the adjustment factor corresponding to it.
  • a correspondence relationship between adjacent grayscale values and adjustment coefficients is stored in advance.
  • the adjustment factor is an integer less than one.
  • FIG. 4 illustrates a flow chart of a method of processing a picture to be displayed of an OLED display, in accordance with an exemplary embodiment of the present invention.
  • the image to be displayed is processed by the method before the OLED display displays the image to be displayed. After the processing is completed, the OLED display displays the processed image to be displayed.
  • step S10 the picture to be displayed is divided into a plurality of blocks.
  • the plurality of blocks may be blocks of any shape, such as blocks that may be rectangular or square. In order to facilitate subsequent calculations, square blocks are preferred.
  • the average grayscale value of each block is determined.
  • the average grayscale value of any one block indicates the average of the grayscale values of all pixels of the one block.
  • the average grayscale value of any one block indicates a weighted average of the grayscale values of all pixels of the one block. Accordingly, as an example, in step S20, the average grayscale value of any one block can be determined by the above formula (1).
  • the values of ⁇ , ⁇ , and ⁇ in the equation (1) can be set according to differences in display of different color components (red, blue, and green) on the OLED display.
  • the OLED is based on different color components (red, blue and green)
  • the difference in luminous efficiency on the display and the difference in transmittance are used to set the magnitude relationship of ⁇ , ⁇ , and ⁇ .
  • the luminous efficiency is G>R>B
  • the transmittance is also G>R>B, so in the present invention
  • the magnitude relationship between ⁇ , ⁇ , and ⁇ of the middle is set to ⁇ ⁇ ⁇ ⁇ ⁇ .
  • step S30 a block whose average grayscale value is greater than a predetermined threshold is determined as a high grayscale block.
  • the predetermined threshold may be set.
  • blocks determined to be high grayscale blocks may also be identified for subsequent processing.
  • the neighboring grayscale values of each of the high grayscale blocks are determined.
  • the neighboring grayscale value of any one of the high grayscale blocks is a weighted sum of average grayscale values of pixels of all adjacent high grayscale blocks, the adjacent high grayscale block being adjacent to the one high grayscale block High grayscale block.
  • the adjacent high gray level block includes a high gray level block having a common side or a common point with the one high gray level block.
  • the neighboring grayscale value of each high grayscale block may be determined by setting the weights of each adjacent high grayscale block in advance.
  • FIG. 2 illustrates one example of calculating weights of neighboring grayscale values, according to an exemplary embodiment of the present invention.
  • FIG. 3 illustrates one example of a neighboring grayscale block in accordance with an exemplary embodiment of the present invention.
  • the weights of each adjacent high gray level block are arranged in the same arrangement as the corresponding adjacent gray level block in FIG. 3, for example, indicating the adjacent gray level block block located in the upper left corner of FIG. 3 (i- The weight of 1, j-1) (ie +1) is located in the upper left corner of Figure 2.
  • the weights of the adjacent high gray level blocks may be set as in the example shown in FIG. 2.
  • FIG. 3 shows a high grayscale block block (i, j) of the i-th column and the j-th row in the picture to be displayed and a block adjacent thereto, wherein the white square 1 represents a high gray level block, and the black square 2 represents a non- A high grayscale block whose adjacent high grayscale blocks include block(i-1,j-1), block(i+1,j-1), block(i+1,j),block(i-1,j +1), block(i, j+1), the neighboring grayscale value of the high grayscale block block (i, j) can be calculated by the above formula (2).
  • step S50 the grayscale values of the pixels of each high grayscale block are adjusted according to the neighboring grayscale values of each high grayscale block. Specifically, in step S50, the grayscale values of the respective components of all the pixels in each high grayscale block are adjusted according to the neighboring grayscale values of each high grayscale block, including: grayscale values of the red component, The grayscale value of the blue component and the grayscale value of the green component. As an example, in step S50, grayscale values of respective color components of pixels of each high grayscale block may be adjusted using adjustment coefficients corresponding to adjacent grayscale values of each high grayscale block, wherein the neighboring gray The larger the order value, the smaller the adjustment factor corresponding to it.
  • a correspondence relationship between adjacent grayscale values and adjustment coefficients is stored in advance.
  • the adjustment factor is an integer less than one.
  • a method of processing a picture to be displayed of an OLED display may be implemented by the respective units described above, or may be implemented as computer readable code on a computer readable recording medium.
  • the computer readable recording medium is any data storage device that can store data that can be thereafter read by a computer system. Examples of the computer readable recording medium include: a read only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and a carrier wave (such as data passing through the Internet via a wired or wireless transmission path) transmission).
  • the computer readable recording medium can also be distributed over a computer system connected to the network such that the computer readable code is stored and executed in a distributed fashion.
  • the functional programs, code and code segments of the present invention can be readily interpreted within the scope of the present invention by ordinary programmers in the art to which the present invention pertains.
  • adjustment of a grayscale value is performed in units of blocks, in units of the entire display screen in the prior art.
  • the brightness and temperature of the OLED display when displaying the display screen can be more accurately adjusted, so that the service life of the OLED can be more effectively improved.
  • the grayscale value of the block adjacent thereto is also considered, which helps to more accurately adjust the brightness and temperature of the OLED display when displaying the display screen.
  • the difference in luminous efficiency of different color components in the pixel and the difference in transmittance are also considered, which also helps to more accurately adjust the display of the display screen of the OLED display. Brightness and temperature can further increase the service life of the OLED.

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
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  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract

一种对OLED显示器的待显示画面进行处理的设备和方法，所述设备包括：块分割单元（10），将待显示画面分成多个块；平均灰阶值确定单元（20），确定每个块的平均灰阶值；高灰阶块确定单元（30），将平均灰阶值大于预定阈值的块确定为高灰阶块；邻近灰阶值确定单元（40），确定每个高灰阶块的邻近灰阶值，其中，任意一个高灰阶块的邻近灰阶值为所有邻近高灰阶块的平均灰阶值的加权和，所述邻近高灰阶块为与所述一高灰阶块相邻的高灰阶块；调整单元（50），根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的像素的灰阶值。通过以块为单位来调整灰阶度，并且考虑了像素的不同颜色分量的发光效率的差异和穿透率的差异，可更有效地提高OLED的使用寿命。

Description

一种对OLED显示器的待显示画面进行处理的设备和方法 技术领域
本发明总体说来涉及图像处理领域。更具体地讲，涉及一种对OLED显示器的待显示画面进行处理的设备和方法。
背景技术
OLED(有机发光二极管)显示技术具有自发光的特性，采用非常薄的有机材料涂层和玻璃基板，当有电流通过时，这些有机材料就会发光。由于OLED不需要背光源便可自发光，同时OLED还具备对比度高、厚度薄、视角广、反应速度快、可用于挠曲性面板、使用温度范围广、构造及制程相对简单等优异特性，所以OLED显示器具有非常好的应用前景。目前OLED显示器存在使用寿命短、价格成本高、存在色彩纯度不足等问题，还没有得到市场的普遍认可，仅在小尺寸便携式设备上有所应用。对于如何提高OLED显示器的使用寿命，现有技术中出现了一种通过调整OLED显示器整体的显示亮度的方式来减少由于OLED显示器的温度过高导致其寿命降低的方法。但是该方法的效果不是很好，且会较大地降低显示画面的质量。
因此，需要一种完善的提高OLED显示器的使用寿命的方法。
发明内容
为克服现有技术的不足本发明的目的在于提供一种对OLED显示器的待显示画面进行处理的设备和方法，以提高OLED显示器的使用寿命。
本发明的示例性实施例的一方面提供一种对OLED显示器的待显示画面进行处理的设备，包括：块分割单元，将待显示画面分成多个块；平均灰阶值确定单元，确定每个块的平均灰阶值；高灰阶块确定单元，将平均灰阶值大于预定阈值的块确定为高灰阶块；邻近灰阶值确定单元，确定每个高灰阶块的邻近灰阶值，其中，任意一个高灰阶块的邻近灰阶值为所有邻近高灰阶块的平均灰阶值的加权和，所述邻近高灰阶块为与所述一高灰阶块相邻的高灰阶块；调 整单元，根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的像素的灰阶值。
在所述设备中，平均灰阶值确定单元可通过下述计算式来确定任意一个块的平均灰阶值：
Figure PCTCN2015079510-appb-000001
其中，AVE_BLK表示所述一个块的平均灰阶值，N表示所述一个块中的像素的数量，Rk表示N个像素中的第k个像素的红色分量的灰阶值，Gk表示N个像素中的第k个像素的绿色分量的灰阶值,Bk表示N个像素中的第k个像素的蓝色分量的灰阶值,α、β和γ分别表示Rk、Gk和Bk的权值，α、β和γ都为整数，且α+β+γ＝1。
在所述设备中，β<α<γ。
在所述设备中，在计算所述加权和时，与所述一高灰阶块之间的边界越长的邻近高灰阶块的权重越大。
在所述设备中，调整单元可利用与每个高灰阶块的邻近灰阶值相应的调整系数来调整每个高灰阶块的像素的各个颜色分量的灰阶值，其中，所述邻近灰阶值越大，与其相应的调整系数越小。
本发明的示例性实施例的另一方面提供一种对OLED显示器的待显示画面进行处理的方法，包括：(a)将待显示画面分成多个块；(b)确定每个块的平均灰阶值；(c)将平均灰阶值大于预定阈值的块确定为高灰阶块；(d)确定每个高灰阶块的邻近灰阶值，其中，任意一个高灰阶块的邻近灰阶值为所有邻近高灰阶块的平均灰阶值的加权和，所述邻近高灰阶块为与所述一高灰阶块相邻的高灰阶块；(e)根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的像素的灰阶值。
在所述方法的步骤(b)中，可通过下述计算式来确定任意一个块的平均灰阶值：
Figure PCTCN2015079510-appb-000002
其中，AVE_BLK表示所述一个块的平均灰阶值，N表示所述一个块中的像素的数量，Rk表示N个像素中的第k个像素的红色分量的灰阶值，Gk表示N个像素中的第k个像素的绿色分量的灰阶值,Bk表示N个像素中的第k个像素的蓝色分量的灰阶值,α、β和γ分别表示Rk、Gk和Bk的权值，α、β和γ都为整数，且α+β+γ＝1。
在所述方法中，β<α<γ。
在所述方法的步骤(d)中计算所述加权和时，与所述一高灰阶块之间的边界越长的邻近高灰阶块的权重越大。
在所述方法中，步骤(e)可包括：利用与每个高灰阶块的邻近灰阶值相应的调整系数来调整每个高灰阶块的像素的各个颜色分量的灰阶值，其中，所述邻近灰阶值越大，与其相应的调整系数越小。
在根据本发明示例性实施例的对OLED显示器的待显示画面进行处理的设备和方法中，以块为单位来进行灰阶值的调整，与现有技术中的以整个显示画面为单位来进行灰阶值的调整相比，更能准确地调整OLED显示器显示该显示画面时的亮度与温度，从而可更有效地提高OLED的使用寿命。此外，在对块的灰阶值进行调整的过程中，还考虑了与其相邻的块的灰阶值情况，这有助于更加准确地调整OLED显示器显示该显示画面时的亮度与温度。
此外，在对块的灰阶值进行调整的过程中，还考虑了像素中不同颜色分量的发光效率的差异以及穿透率的差异，这也有助于更加准确地调整OLED显示器显示该显示画面时的亮度与温度，从而可进一步地提高OLED的使用寿命。将在接下来的描述中部分阐述本发明另外的方面和/或优点，还有一部分通过描述将是清楚的，或者可以经过本发明的实施而得知。
附图说明
通过下面结合附图进行的详细描述，本发明的上述和其它目的、特点和优点将会变得更加清楚，其中：
图1是示出根据本发明示例性实施例的对OLED显示器的待显示画面进行处理的设备的框图；
图2是示出根据本发明示例性实施例的计算邻近灰阶值的权重的一个示 例；
图3是示出根据本发明示例性实施例的邻近灰阶块的一个示例；
图4是示出根据本发明示例性实施例的对OLED显示器的待显示画面进行处理的方法的流程图。
具体实施方式
下面参照附图详细描述本发明的实施例。
图1是示出根据本发明示例性实施例的对OLED显示器的待显示画面进行处理的设备的框图。在OLED显示器显示待显示画面之前通过所述设备对待显示画面进行处理，在处理完成之后，OLED显示器再显示处理过后的待显示画面。
根据本发明的示例性实施例的对OLED显示器的待显示画面进行处理的设备包括：块分割单元10、平均灰阶值确定单元20、高灰阶块确定单元30、邻近灰阶值确定单元40和调整单元50。这些单元可由数字信号处理器、现场可编程门阵列等通用硬件处理器来实现，也可通过专用芯片等专用硬件处理器来实现，还可完全通过计算机程序来以软件方式实现，例如图像处理软件。
参照图1，块分割单元10将待显示画面分成多个块。所述多个块可以是任意形状的块，例如可以是长方形或正方形的块。为了方便后续的计算，优选为正方形的块。
平均灰阶值确定单元20确定每个块的平均灰阶值。任意一个块的平均灰阶值指示所述一个块的所有像素的灰阶值的平均情况。优选地，考虑到不同颜色分量(红色、蓝色和绿色)在OLED显示器上显示的差异，任意一个块的平均灰阶值指示所述一个块的所有像素的灰阶值的加权平均值。相应地，作为示例，平均灰阶值确定单元20可通过下述式(1)来确定任意一个块的平均灰阶值：
Figure PCTCN2015079510-appb-000003
其中，AVE_BLK表示所述一个块的平均灰阶值，N表示所述一个块中的像素的数量，Rk表示N个像素中的第k个像素的红色分量的灰阶值，Gk表示N 个像素中的第k个像素的绿色分量的灰阶值,Bk表示N个像素中的第k个像素的蓝色分量的灰阶值,α、β和γ分别表示Rk、Gk和Bk的权值，α、β和γ都为整数，且α+β+γ＝1，可根据不同颜色分量(红色、蓝色和绿色)在OLED显示器上显示的差异来对α、β和γ的值进行设置。
在一个优选的实施例中，根据不同颜色分量(红色、蓝色和绿色)在OLED显示器上的发光效率的差异以及穿透率的差异来设置α、β和γ的大小关系。具体说来，考虑到不同颜色分量(红色、蓝色和绿色)的发光效率的大小顺序以及穿透率的大小顺序都是：绿色分量大于红色分量，红色分量大于蓝色分量，在本发明中将α、β和γ的大小关系设置为β<α<γ。
高灰阶块确定单元30将平均灰阶值大于预定阈值的块确定为高灰阶块。这里，所述预定阈值可被设置。作为示例，高灰阶块确定单元30还可将确定为高灰阶块的块进行标识，以便于后续处理。
邻近灰阶值确定单元40确定每个高灰阶块的邻近灰阶值。这里，任意一个高灰阶块的邻近灰阶值为所有邻近高灰阶块的像素的平均灰阶值的加权和，所述邻近高灰阶块为与所述一高灰阶块相邻的高灰阶块。这里，邻近高灰阶块包括与所述一高灰阶块具有共同边或共同点的高灰阶块。优选地，在计算所述加权和时，与所述一高灰阶块之间的边界越长的邻近高灰阶块的权重越大。优选地，邻近灰阶值确定单元40可通过预先设置各邻近高灰阶块的权重来确定每个高灰阶块的邻近灰阶值。
图2示出根据本发明示例性实施例的计算邻近灰阶值的权重的一个示例。图3示出根据本发明示例性实施例的邻近灰阶块的一个示例。在图2中，各邻近高灰阶块的权重按与图3中的相应的邻近灰阶块相同的排列方式进行排列，例如，表示位于图3中左上角的邻近灰阶块block(i-1,j-1)的权重(即+1)的分量位于图2中的左上角。在块分割单元10将待显示画面分成的多个块为正方形或长方形的情况下，各邻近高灰阶块的权重可按如图2所示的示例进行设置。图3示出了待显示画面中第i列、第j行的高灰阶块block(i,j)及与其相邻的块，其中，白色正方形1表示高灰阶块，黑色正方形2表示非高灰阶块，其邻近高灰阶块包括block(i-1,j-1)、block(i+1,j-1)、block(i+1,j)、block(i-1,j+1)、block(i,j+1)。高灰阶块block(i,j)的邻近灰阶值可通过如下算式(2)来计算：
Weigh_sum(i,j)＝AVE_BLK(i-1,j-1)×1+AVE_BLK(i+1,j-1)×1+AVE_BLK (i+1,j)×2+AVE_BLK(i-1,j+1)×1+AVE_BLK(i,j+1)×2       (2)
其中，Weigh_sum(i,j)表示高灰阶块block(i,j)的邻近灰阶值，AVE_BLK(i-1,j-1)、AVE_BLK(i+1,j-1)、AVE_BLK(i+1,j)、AVE_BLK(i-1,j+1)、AVE_BLK(i,j+1)分别表邻近高灰阶块：block(i-1,j-1)、block(i+1,j-1)、block(i+1,j)、block(i-1,j+1)、block(i,j+1)的平均灰阶值。
调整单元50根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的像素的灰阶值。具体说来，调整单元50根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的中的所有像素的各个分量的灰阶值，包括：红色分量的灰阶值、蓝色分量的灰阶值和绿色分量的灰阶值。作为示例，调整单元50可利用与每个高灰阶块的邻近灰阶值相应的调整系数来调整每个高灰阶块的像素的各个颜色分量的灰阶值，其中，所述邻近灰阶值越大，与其相应的调整系数越小。也就是说，一个高灰阶块的邻近灰阶值越大，其调整后的灰阶值的减小比例越大。作为示例，与预先存储邻近灰阶值与调整系数的对应关系。所述调整系数为小于1的整数。
图4示出根据本发明示例性实施例的对OLED显示器的待显示画面进行处理的方法的流程图。在OLED显示器显示待显示画面之前通过所述方法对待显示画面进行处理，在处理完成之后，OLED显示器再显示处理过后的待显示画面。
参照图4，在步骤S10，将待显示画面分成多个块。所述多个块可以是任意形状的块，例如可以是长方形或正方形的块。为了方便后续的计算，优选为正方形的块。
在步骤S20，确定每个块的平均灰阶值。任意一个块的平均灰阶值指示所述一个块的所有像素的灰阶值的平均情况。优选地，考虑到不同颜色分量(红色、蓝色和绿色)在OLED显示器上显示的差异，任意一个块的平均灰阶值指示所述一个块的所有像素的灰阶值的加权平均值。相应地，作为示例，在步骤S20，可通过上述式(1)来确定任意一个块的平均灰阶值。
这里，可根据不同颜色分量(红色、蓝色和绿色)在OLED显示器上显示的差异来对式(1)中的α、β和γ的值进行设置。
在一个优选的实施例中，根据不同颜色分量(红色、蓝色和绿色)在OLED 显示器上的发光效率的差异以及穿透率的差异来设置α、β和γ的大小关系。具体说来，若是蒸镀的RGB OLED,发光效率是G>R>B,若是WOLED(白光OLED)加color filter(彩色滤光片),穿透率也是G>R>B,因此在本发明中将α、β和γ的大小关系设置为β<α<γ。
在步骤S30，将平均灰阶值大于预定阈值的块确定为高灰阶块。这里，所述预定阈值可被设置。作为示例，在步骤30，还可将确定为高灰阶块的块进行标识，以便于后续处理。
在步骤S40，确定每个高灰阶块的邻近灰阶值。这里，任意一个高灰阶块的邻近灰阶值为所有邻近高灰阶块的像素的平均灰阶值的加权和，所述邻近高灰阶块为与所述一高灰阶块相邻的高灰阶块。这里，邻近高灰阶块包括与所述一高灰阶块具有共同边或共同点的高灰阶块。优选地，在计算所述加权和时，与所述一高灰阶块之间的边界越长的邻近高灰阶块的权重越大。优选地，在步骤S40，可通过预先设置各邻近高灰阶块的权重来确定每个高灰阶块的邻近灰阶值。
图2示出根据本发明示例性实施例的计算邻近灰阶值的权重的一个示例。图3示出根据本发明示例性实施例的邻近灰阶块的一个示例。在图2中，各邻近高灰阶块的权重按与图3中的相应的邻近灰阶块相同的排列方式进行排列，例如，表示位于图3中左上角的邻近灰阶块block(i-1,j-1)的权重(即+1)的分量位于图2中的左上角。在步骤S10将待显示画面分成的多个块为正方形或长方形的情况下，各邻近高灰阶块的权重可按如图2所示的示例进行设置。图3示出了待显示画面中第i列、第j行的高灰阶块block(i,j)及与其相邻的块，其中，白色正方形1表示高灰阶块，黑色正方形2表示非高灰阶块，其邻近高灰阶块包括block(i-1,j-1)、block(i+1,j-1)、block(i+1,j)、block(i-1,j+1)、block(i,j+1)，高灰阶块block(i,j)的邻近灰阶值可通过上述算式(2)来计算。
在步骤S50，根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的像素的灰阶值。具体说来，在步骤S50，根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的中的所有像素的各个分量的灰阶值，包括：红色分量的灰阶值、蓝色分量的灰阶值和绿色分量的灰阶值。作为示例，在步骤S50，可利用与每个高灰阶块的邻近灰阶值相应的调整系数来调整每个高灰阶块的像素的各个颜色分量的灰阶值，其中，所述邻近灰阶值越大，与其相应的调整系数越小。 也就是说，一个高灰阶块的邻近灰阶值越大，其调整后的灰阶值的减小比例越大。作为示例，与预先存储邻近灰阶值与调整系数的对应关系。所述调整系数为小于1的整数。
应该理解，根据本发明示例性实施例的对OLED显示器的待显示画面进行处理的方法可通过上述各个单元来实现，也可实现为计算机可读记录介质上的计算机可读代码。计算机可读记录介质是可存储其后可由计算机系统读出的数据的任意数据存储装置。计算机可读记录介质的示例包括：只读存储器(ROM)、随机存取存储器(RAM)、CD-ROM、磁带、软盘、光数据存储装置和载波(诸如经有线或无线传输路径通过互联网的数据传输)。计算机可读记录介质也可分布于连接网络的计算机系统，从而计算机可读代码以分布式存储和执行。此外，完成本发明的功能程序、代码和代码段可容易地被与本发明相关的领域的普通程序员在本发明的范围之内解释。
在根据本发明示例性实施例的对OLED显示器的待显示画面进行处理的设备和方法中，以块为单位来进行灰阶值的调整，与现有技术中的以整个显示画面为单位来进行灰阶值的调整相比，更能准确地调整OLED显示器显示该显示画面时的亮度与温度，从而可更有效地提高OLED的使用寿命。此外，在对块的灰阶值进行调整的过程中，还考虑了与其相邻的块的灰阶值情况，有助于更加准确地调整OLED显示器显示该显示画面时的亮度与温度。
此外，在对块的灰阶值进行调整的过程中，还考虑了像素中不同颜色分量的发光效率的差异以及穿透率的差异，也有助于更加准确地调整OLED显示器显示该显示画面时的亮度与温度，从而可进一步地提高OLED的使用寿命。
尽管已经参照其示例性实施例具体显示和描述了本发明，但是本领域的技术人员应该理解，在不脱离权利要求所限定的本发明的精神和范围的情况下，可以对其进行形式和细节上的各种改变。

Claims (10)

  1. 一种对OLED显示器的待显示画面进行处理的设备，其中，包括：
    块分割单元，将待显示画面分成多个块；
    平均灰阶值确定单元，确定每个块的平均灰阶值；
    高灰阶块确定单元，将平均灰阶值大于预定阈值的块确定为高灰阶块；
    邻近灰阶值确定单元，确定每个高灰阶块的邻近灰阶值，其中，任意一个高灰阶块的邻近灰阶值为所有邻近高灰阶块的平均灰阶值的加权和，所述邻近高灰阶块为与所述一高灰阶块相邻的高灰阶块；
    调整单元，根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的像素的灰阶值。
  2. 根据权利要求1所述的设备，其中，平均灰阶值确定单元通过下述计算式来确定任意一个块的平均灰阶值：
    Figure PCTCN2015079510-appb-100001
    其中，AVE_BLK表示所述一个块的平均灰阶值，N表示所述一个块中的像素的数量，Rk表示N个像素中的第k个像素的红色分量的灰阶值，Gk表示N个像素中的第k个像素的绿色分量的灰阶值,Bk表示N个像素中的第k个像素的蓝色分量的灰阶值,α、β和γ分别表示Rk、Gk和Bk的权值，α、β和γ都为整数，且α+β+γ＝1。
  3. 根据权利要求2所述的设备，其中，β<α<γ。
  4. 根据权利要求1所述的设备，其中，在计算所述加权和时，与所述一高灰阶块之间的边界越长的邻近高灰阶块的权重越大。
  5. 根据权利要求1所述的设备，其中，调整单元利用与每个高灰阶块的邻近灰阶值相应的调整系数来调整每个高灰阶块的像素的各个颜色分量的灰阶值，其中，所述邻近灰阶值越大，与其相应的调整系数越小。
  6. 一种对OLED显示器的待显示画面进行处理的方法，其中，包括：
    (a)将待显示画面分成多个块；
    (b)确定每个块的平均灰阶值；
    (c)将平均灰阶值大于预定阈值的块确定为高灰阶块；
    (d)确定每个高灰阶块的邻近灰阶值，其中，任意一个高灰阶块的邻近灰阶值为所有邻近高灰阶块的平均灰阶值的加权和，所述邻近高灰阶块为与所述一高灰阶块相邻的高灰阶块；
    (e)根据每个高灰阶块的邻近灰阶值来调整每个高灰阶块的像素的灰阶值。
  7. 根据权利要求6所述的方法，其中，在步骤(b)中，通过下述计算式来确定任意一个块的平均灰阶值：
    Figure PCTCN2015079510-appb-100002
    其中，AVE_BLK表示所述一个块的平均灰阶值，N表示所述一个块中的像素的数量，Rk表示N个像素中的第k个像素的红色分量的灰阶值，Gk表示N个像素中的第k个像素的绿色分量的灰阶值,Bk表示N个像素中的第k个像素的蓝色分量的灰阶值,α、β和γ分别表示Rk、Gk和Bk的权值，α、β和γ都为整数，且α+β+γ＝1。
  8. 根据权利要求7所述的方法，其中，β<α<γ。
  9. 根据权利要求6所述的方法，其中，在步骤(d)中计算所述加权和时，与所述一高灰阶块之间的边界越长的邻近高灰阶块的权重越大。
  10. 根据权利要求6所述的方法，其中，步骤(e)包括：利用与每个高灰阶块的邻近灰阶值相应的调整系数来调整每个高灰阶块的像素的各个颜色分量的灰阶值，其中，所述邻近灰阶值越大，与其相应的调整系数越小。
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