WO2014139239A1 - 一种确定显示器残像等级的方法及装置 - Google Patents

一种确定显示器残像等级的方法及装置 Download PDF

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Publication number
WO2014139239A1
WO2014139239A1 PCT/CN2013/078092 CN2013078092W WO2014139239A1 WO 2014139239 A1 WO2014139239 A1 WO 2014139239A1 CN 2013078092 W CN2013078092 W CN 2013078092W WO 2014139239 A1 WO2014139239 A1 WO 2014139239A1
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WIPO (PCT)
Prior art keywords
afterimage
brightness
value
area
display
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PCT/CN2013/078092
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English (en)
French (fr)
Inventor
占玙娟
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合肥京东方光电科技有限公司
京东方科技集团股份有限公司
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Application filed by 合肥京东方光电科技有限公司, 京东方科技集团股份有限公司 filed Critical 合肥京东方光电科技有限公司
Priority to KR1020147017367A priority Critical patent/KR101579395B1/ko
Priority to JP2015561903A priority patent/JP6430416B2/ja
Priority to US14/364,469 priority patent/US9177529B2/en
Priority to EP13859601.0A priority patent/EP2975602B1/en
Publication of WO2014139239A1 publication Critical patent/WO2014139239A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/90—Determination of colour characteristics
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects
    • 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

Definitions

  • Embodiments of the present invention relate to the field of display technologies, and in particular, to a method and apparatus for determining a residual image level of a display. Background technique
  • the liquid crystal display is a kind of flat panel display.
  • a screen is displayed for a long time, there is residual charge under the action of an applied electric field.
  • These residual charges make the liquid crystal display not display a new picture in time after switching to other screens, and the original remains.
  • the afterimage of the picture affects the display effect of the liquid crystal display, and the same phenomenon can occur in other flat panel displays such as plasma TVs.
  • the prior art mainly evaluates the afterimage level by visual comparison with the afterimage level sample.
  • This method of determining the afterimage level by the human eye has a reluctant subjectivity, and often results in a difference in judgment results due to human and human visual differences.
  • the residual image level of the display can only be determined by human eye observation, and the accuracy is low.
  • Embodiments of the present invention provide a method and apparatus for determining a residual image level of a display, which are used to solve the problem that the residual image level of the display can only be determined by human eye observation in the prior art, and the accuracy is low.
  • a method for determining an afterimage level includes: determining a brightness change index of an afterimage displayed by the display after performing the afterimage test and an area index of the afterimage, wherein the brightness change index of the afterimage is performing afterimage
  • the difference between the brightness difference of the afterimage displayed by the display after the test and the brightness value of the display before the afterimage test, the area index of the afterimage is the afterimage area Occupying a percentage of the display area of the display; determining the afterimage level of the display based on the determined brightness change index and area index.
  • the brightness value of the display before the afterimage test is a brightness value of the display when the screen displays a single color value.
  • determining a residual image level of the display based on the determined brightness change index and area index includes determining an afterimage level of the display based on a product of a determined brightness change index and an area index of the afterimage.
  • the difference in brightness of the afterimage is determined according to the following steps:
  • the absolute value of the difference between the luminance value and the luminance value of the display before the afterimage test is taken as a luminance value of the afterimage displayed on the display after the afterimage test.
  • the residual image of the corresponding black image of the residual image corresponding to the black image and the residual image corresponding to the white image after the afterimage test is The absolute value of the difference value of the luminance values corresponding to the afterimage of the white screen is used as the luminance difference value corresponding to the group of luminance values.
  • determining the afterimage level of the display according to the determined brightness change index and area index including: if after the afterimage test, the display is displayed
  • the residual image has two or more brightness values, and for one of the brightness values, the brightness change index corresponding to the brightness value is determined according to the brightness difference corresponding to the brightness value, and the brightness change index corresponding to the brightness value and the brightness value are
  • the area index of the afterimage is multiplied to obtain an afterimage index corresponding to the luminance value; and the residual image level is determined based on the result obtained by adding the afterimage indices corresponding to all the luminance values.
  • determining the brightness difference corresponding to each set of brightness values includes: selecting an afterimage from all the area blocks of the picture displayed by the display after the afterimage test a region block, and determining a luminance value corresponding to each of the region blocks having the afterimage, wherein each of the region blocks includes only a residual image of a black picture or an afterimage containing only a white picture or no residual image; Dividing an area block having the same brightness value among all the area blocks into one afterimage area; dividing the afterimage area of one black picture and the afterimage area of one white picture into one afterimage group, for one of the afterimage groups, within the group
  • the difference between the luminance values of the afterimage regions corresponding to the afterimage regions of the black screen and the afterimage regions of the white screen is corresponding to the group
  • the brightness difference value wherein the absolute value of the difference between the brightness value corresponding to the afterimage area of the black picture in the same group and the brightness value of the picture displayed on
  • Determining the afterimage level of the display according to the determined brightness change index and the area index comprising: determining, according to the brightness difference value corresponding to the afterimage group, a brightness change index corresponding to the brightness difference value, corresponding to the afterimage group The brightness change index is multiplied by the area index corresponding to the afterimage group to obtain an afterimage index corresponding to the afterimage group; and the afterimage level is determined according to a result obtained by adding the afterimage indices corresponding to all the afterimage groups.
  • a first determining module configured to determine a brightness change index of the afterimage displayed by the display after the afterimage test and an area index of the afterimage, wherein the brightness change index of the afterimage is a brightness difference value of the afterimage displayed by the display after performing the afterimage test
  • the percentage of the brightness value of the display before the afterimage test, the area index of the afterimage is the percentage of the afterimage area occupying the display area of the display;
  • a second determining module configured to determine an afterimage level of the display according to the determined brightness change index and area index.
  • the brightness value of the display before the afterimage test determined by the first determining module is a brightness value of the display when the screen of the single color value is displayed.
  • the second determining module determines an afterimage level of the display based on a product of a determined brightness variation index of the afterimage and an area index.
  • the first determining module is configured to: if the screen displayed by the display during the afterimage test is a screen having a single color value, a brightness value of the afterimage displayed by the display after the afterimage test, the brightness value is The absolute value of the difference between the brightness values of the display before the afterimage test is used as the brightness difference corresponding to the brightness value; if the picture displayed by the display during the afterimage test is black and white, then a set of corresponding blacks for the afterimage test The residual image of the screen and the luminance value of the afterimage corresponding to the white screen, the absolute value of the difference between the residual image of the corresponding black screen and the luminance value of the residual image corresponding to the white screen in the group is the luminance difference corresponding to the set of luminance values.
  • the first determining module is configured to: if after the afterimage test, the afterimage displayed by the display has more than two brightness values, Then for one of the brightness values, according to the brightness value corresponding to the brightness value Determining a brightness change index corresponding to the brightness value, multiplying the brightness change index corresponding to the brightness value and the area index of the afterimage having the brightness value to obtain an afterimage index corresponding to the brightness value, and according to the afterimage index corresponding to all the brightness values The result obtained is added to determine the afterimage level.
  • the first determining module is configured to: select an area having an afterimage from all the regions of the screen displayed by the display after the afterimage test. Blocking, and determining a brightness value corresponding to each of the area blocks having the afterimage, wherein each of the all of the area blocks includes only the afterimage of the black picture or the afterimage containing only the white picture or does not contain any afterimage;
  • the area block having the same luminance value in all the area blocks is divided into one afterimage area; the afterimage area of one black picture and the afterimage area of one white picture are divided into one afterimage group, wherein for one of the afterimage groups, the black picture in the group is
  • the difference between the luminance values of the afterimage regions corresponding to the afterimage regions of the white picture is the luminance difference corresponding to the group, wherein the luminance values corresponding to the afterimage regions of the black picture in the same group and the brightness of the screen displayed by the display before the afterimage test.
  • the embodiment of the present invention determines the afterimage level of the display by determining the brightness change index of the afterimage displayed after the afterimage test and the area index of the afterimage, wherein the brightness change index of the afterimage is the brightness of the afterimage displayed by the display after the afterimage test
  • the difference is the percentage of the brightness value of the display before the afterimage test
  • the area index of the afterimage is the percentage of the afterimage area occupying the display area of the display. Since the brightness change index and the area index of the afterimage are both objectively determined, the embodiment of the present invention is adopted. It is possible to objectively determine the residual image level of the display without using the subjective observation of the human eye, thereby improving the accuracy of determining the residual image level of the display.
  • FIG. 1 is a schematic diagram of a screen with an afterimage displayed on a display after performing a afterimage test on a display using a black checkerboard screen according to an embodiment of the present invention
  • FIG. 2 is a residual image test of a display using a black and white checkerboard screen according to an embodiment of the present invention. After that, the display shows a schematic diagram of the image with afterimages;
  • FIG. 3 is a schematic diagram showing an afterimage of a display having a single luminance value after the afterimage test;
  • FIG. 4 is a schematic diagram showing an afterimage of a plurality of luminance values after the afterimage test;
  • FIG. 5 is a schematic diagram of determining afterimages according to an embodiment of the present invention. Level device structure diagram. detailed description
  • the embodiment of the present invention determines the afterimage level of the display by determining the brightness change index of the afterimage displayed after the afterimage test and the area index of the afterimage, wherein the brightness change index of the afterimage is the brightness of the afterimage displayed by the display after the afterimage test
  • the difference is the percentage of the brightness value of the display before the afterimage test
  • the area index of the afterimage is the percentage of the afterimage area occupying the display area of the display. Since the brightness change index and the area index of the afterimage are both objectively determined, the embodiment of the present invention is adopted. It is not necessary to adopt the method of human eye observation, but the objective image level of the display can be objectively determined, and the accuracy of determining the image residual image level is improved.
  • S101 determining a brightness change index of the afterimage displayed by the display after the afterimage test and an area index of the afterimage; wherein the brightness change index of the afterimage is the brightness difference of the afterimage displayed by the display after the afterimage test and the brightness value of the display before performing the afterimage test Percentage; the area index of the afterimage is the percentage of the image area occupied by the afterimage area;
  • S102 Determine an afterimage level of the display according to the determined brightness change index and the area index of the afterimage.
  • the brightness value of the display before the afterimage test is the brightness value of the display when displaying a single color value.
  • a screen of a single color value may be displayed on the display, that is, a screen with a unique color value, such as a full gray screen with a color value of (127, 127, 127), after that,
  • the optical test device can be used to test the brightness value of the display at this time; the test picture for performing the afterimage test can select a picture with a unique color value and a different brightness value than before the afterimage test, such as a color value selectable (0, 0, 0).
  • Test screen can choose between black and white Checkerboard screen. After the test is finished, switch the display screen to the screen displayed before the afterimage test. If you switch to the full gray screen with the previous color value (127, 127, 127), the screen displayed on the monitor may have residual images, depending on the afterimage.
  • the brightness change index and the area index determine the afterimage level of the display.
  • determining the afterimage level of the display based on the determined brightness change index and area index including:
  • the residual image level of the display is determined based on the product of the brightness variation index of the determined afterimage and the area index.
  • the brightness change index and the area index of the afterimage may be respectively used to indicate the level of the afterimage, that is, the afterimage level may be determined for the display by only the brightness change index or only the area index may be used to determine the afterimage level for the display.
  • the brightness change index and the area index of the afterimage can be comprehensively considered, that is, the residual image level of the display is determined according to the product of the brightness change index and the area index, where the product of the brightness change index and the area index is referred to as the afterimage index.
  • the afterimage level to which the afterimage index belongs is set in advance.
  • the afterimage index is set to be less than 0.1 as the first-order afterimage, and the afterimage index is between 0.1 and 0.2 as the second-order afterimage, and the afterimage level is higher. The display is less effective.
  • Method 1 If the picture displayed by the display during the afterimage test is a picture with a single color value, a brightness value of the afterimage displayed by the display after the afterimage test, and the difference between the brightness value and the brightness value of the display before the afterimage test The absolute value is used as the brightness difference corresponding to the brightness value;
  • the difference in brightness of the afterimage displayed by the display after the afterimage test may be the difference between the brightness value of the afterimage displayed by the afterimage test and the brightness value of the display before the afterimage test.
  • Absolute value it should be noted that if the residual image brightness value displayed after the afterimage test is unique, there is only one brightness difference here. If the afterimage displayed after the afterimage test has multiple brightness values, each brightness value of the afterimage is obtained. The absolute value is subtracted from the luminance value before the afterimage test, and the luminance difference corresponding to each luminance value is obtained, that is, there are multiple luminance differences of the afterimage displayed by the display.
  • the afterimage image has a plurality of luminance values, which may mean that the afterimage image has a plurality of luminance average values; that is, the screen displayed by the display is divided into a plurality of regional blocks, and the afterimage region block is determined after the afterimage test, and each afterimage region block is determined.
  • luminance average value and all the afterimage region blocks have a plurality of different luminance average values, and the region blocks here may be a checkerboard or the like.
  • determining the afterimage level of the display according to the determined brightness change index and the area index includes:
  • the afterimage displayed by the display has more than two brightness values, determining, for one of the brightness values, a brightness change index corresponding to the brightness value according to the brightness difference corresponding to the brightness value, corresponding to the brightness value Multiplying a brightness change index by an area index of the afterimage having the brightness value to obtain an afterimage index corresponding to the brightness value;
  • the afterimage level is determined based on the result obtained by adding the afterimage indices corresponding to all the luminance values.
  • the afterimage index corresponding to each brightness value is determined according to the above steps, and all the brightness values are corresponding.
  • the afterimage indices are added, and the residual image level of the display is determined based on the added result.
  • the brightness value here may be the average value of the brightness; for example, the display shows a full gray picture with a color value of (127, 127, 127) before the afterimage test, and the brightness value of the display before the test is Y, during the afterimage test
  • the test screen is a black checkerboard.
  • the display shows the image with the afterimage, as shown in Figure 2
  • the number of checkers with the brightness value Y(bl) is 6.
  • Method 2 If the screen displayed by the display during the afterimage test is black and white, the brightness values of the residual image corresponding to the black image and the afterimage corresponding to the white image after the afterimage test are based on the corresponding black image in the group. The absolute value of the difference between the afterimage and the luminance value of the afterimage corresponding to the white picture determines the luminance difference corresponding to the set of luminance values.
  • the brightness difference of the display after the afterimage test may be the difference between the brightness values of the afterimages of the two pictures after the afterimage test.
  • the absolute value of the difference between the brightness value of the afterimage of the black picture and the brightness value of the afterimage of the white picture can be directly used as the brightness difference of the afterimage displayed on the display; if the residual image of the black picture displayed by the display after the afterimage test and white
  • the afterimages of the screen respectively have a plurality of luminance values, or the afterimages of the black screen and the white screen have a plurality of luminance values, and the afterimage images displayed on the display after the afterimage test can be divided according to the luminance values respectively possessed by the residual image.
  • the afterimages of the black picture have the same brightness value
  • the afterimages of the white picture have the same brightness value
  • the residual images of the black picture and the white picture in the same group are close to each other, that is,
  • the absolute value of the difference between the luminance value of the afterimage of the black picture and the brightness value of the display before the afterimage test and the absolute value of the difference between the brightness value of the afterimage of the white picture and the brightness value of the display before the afterimage test are similar.
  • determining the brightness difference corresponding to each set of brightness values includes: a block, and determining a brightness value corresponding to each of the area blocks having the afterimage; Each block in the block contains only the afterimage of the black picture or the afterimage containing only the white picture;
  • the area block having the same brightness value in all the area blocks is divided into one afterimage area; the afterimage area of one black picture and the afterimage area of one white picture are divided into one afterimage group, and for one of the afterimage groups, the black picture in the group is
  • the difference between the luminance values of the afterimage regions corresponding to the afterimage regions of the white picture is the luminance difference corresponding to the group; wherein, the luminance values corresponding to the afterimage regions of the black picture in the same group and the brightness of the screen displayed by the display before the afterimage test
  • the absolute value of the difference value, the difference between the absolute value of the difference between the brightness value corresponding to the afterimage area of the white picture and the brightness value of the picture displayed on the display before the afterimage test may be within the set range;
  • Determining the afterimage level of the display according to the determined brightness change index and the area index comprising: determining, according to the brightness difference value corresponding to the afterimage group, a brightness change index corresponding to the brightness difference value, and changing the brightness corresponding to the afterimage group The index is multiplied by an area index corresponding to the afterimage group to obtain an afterimage index corresponding to the afterimage group;
  • the residual image level of the display is determined based on the result of adding the afterimage indices corresponding to all the afterimage groups.
  • the area blocks in the above steps may be bar-shaped, circular, square, etc., for example, may be a checkerboard as shown in FIGS. 2 and 3, in the figure, each checkerboard
  • the area corresponds to a brightness value, where the brightness value refers to the brightness of all the pixels corresponding to each checkerboard area.
  • the afterimage of the black image and the afterimage of the white image may have only one luminance value respectively.
  • the difference between the luminance values of the residual image of the black image and the residual image of the white image is determined, and the brightness change index and the afterimage are determined.
  • the area index which can determine the afterimage index of the display.
  • the same brightness value may be obtained after determining the area block having the afterimage and the brightness value of each area block.
  • the area block is divided into an afterimage area. Since the residual image of the black picture is different from the residual image brightness value of the white picture, the afterimage of the black picture and the afterimage of the white picture belong to different afterimage areas, respectively, and the afterimage area for each black picture is Select the afterimage area of the white picture that matches it, divide the two areas into one afterimage group, and use the absolute value of the difference between the residual image of the residual image of the black image and the residual image of the white picture in the afterimage group as the residual image group.
  • the brightness difference value can determine the brightness change index corresponding to the afterimage group.
  • the screen displaying the afterimage is displayed on the display, and among the 15 area blocks of the screen displayed by the display, 10 area blocks are displayed.
  • Y(b1) and Y(b2) are the luminance values of the afterimage of the black screen
  • Y(wl) and Y(w2) are the luminance values of the afterimage of the white screen
  • the luminance block is the area block of Y(bl). Divided into an afterimage area.
  • the area blocks whose luminance values are Y(b2), Y(wl), and Y(w2) are respectively divided into one afterimage area, and a white picture matching the residual image of the black picture is determined.
  • the afterimages are divided into an afterimage group.
  • the afterimage of the black image with the luminance value Y (bl) and the afterimage of the white image with the luminance value Y (wl) are the residual image group 1, and the luminance value is Y (b2).
  • the afterimage of the black screen and the afterimage of the white screen with the luminance value Y (w2) are afterimage group 2, where the residual image of the black image in one afterimage group and the afterimage of the white screen are similar, that is, , the residual image of the black picture and the afterimage test
  • the difference between the absolute value of the difference between the luminance values and the absolute value of the difference between the afterimage of the white picture and the brightness value of the display before the afterimage test may be within the set range or be similar.
  • the area indices of the afterimage group 1 and the afterimage group 2 are 6/15 and 4/15, respectively, and the sum S of the afterimage indices corresponding to all the afterimage groups of the display is:
  • the residual image level of the display can be determined based on the determined S Q value and the correspondence between the preset afterimage index and the afterimage level.
  • S401 Display a screen with a single color value on the display, and test the brightness value of the display at this time;
  • an all-grey picture with color values (127, 127, 127) as shown in Figures 5 and 6 can be selected, and the brightness value of the display at this time is tested using an optical test device.
  • S402 performing a afterimage test on the display by using a black and white checkerboard screen
  • step S403 After the afterimage test, the display screen is switched to the screen before the afterimage test. If the display shows the afterimage with a single color value as shown in FIG. 5, the process proceeds to step S404, and if the display is displayed at this time.
  • the residual image having a plurality of color values shown in FIG. 6 is switched to step S406; as shown in FIG. 5, after the afterimage test, the display displays a schematic diagram of the afterimage with a single luminance value; as shown in FIG. After the test, the display shows a schematic of the afterimage with multiple brightness values.
  • step S404 testing the brightness values Y(b), Y(w) of the residual image of the black and white grid in the original black and white checkerboard screen, and determining the area index B of the displayed afterimage, and shifting to step S405;
  • S405 Determine the afterimage index Q of the display according to the following formula, and determine the afterimage level of the display according to the determined afterimage index:
  • S406 testing a plurality of brightness values of the residual image of the black box at the original black and white checkerboard and a plurality of brightness values of the afterimage of the white square;
  • the luminance values of the residual image of the black grid are Y (bl) and Y (b2), and the luminance values of the afterimage of the white grid are Y (wl) and Y (w2);
  • Y(bl) can be used. And Y(wl) is divided into afterimage group one, and Y(b2) and Y(w2) are divided into afterimage group two;
  • S408 Determine, according to a brightness difference value corresponding to the afterimage group, the brightness difference value for an afterimage group Corresponding brightness change index, multiplying the brightness change index corresponding to the afterimage group by the area index corresponding to the afterimage group to obtain an afterimage index corresponding to the afterimage group;
  • the area index of the afterimage corresponding to the afterimage group is B 1
  • the area index of the afterimage corresponding to the afterimage group 2 is B2
  • the sum of the afterimage indices corresponding to all the afterimage groups is S Q :
  • the afterimage level of the display is one level or that the afterimage level of the display is qualified.
  • an embodiment of the present invention further provides a device for determining an afterimage level corresponding to a method for determining a residual image level of a display.
  • the principle of solving the problem is similar to the method for determining an afterimage level in the embodiment of the present invention.
  • the implementation of the device can be referred to the implementation of the method, and the repeated description will not be repeated.
  • the device structure diagram for determining the afterimage level includes: a first determining module 71, configured to determine a brightness change index of the afterimage displayed by the display after the afterimage test and an area of the afterimage displayed.
  • the index wherein the brightness change index of the afterimage is a percentage of the brightness difference of the afterimage displayed by the display after the afterimage test and the brightness value of the display before the afterimage test, and the area index of the afterimage is the percentage of the afterimage area occupying the display area of the display;
  • the second determining module 72 is configured to determine an afterimage level of the display according to the brightness variation index and the area index of the determined residual image.
  • the device for determining the image residual level of the display may be a device consisting of an optical test device, an afterimage test device, and a computer control device, or may be integrated with an optical test function, an afterimage test function, and a control, calculation, and the like. a device.
  • the brightness value of the display before the afterimage test determined by the first determining module 71 is the brightness value of the display when the picture of the single color value is displayed.
  • the second determining module 72 can be configured to determine the afterimage level of the display based on the product of the brightness variation index of the determined afterimage and the area index.
  • the first determining module 71 can be used to display a picture when the display is in the afterimage test.
  • a picture having a single color value, and a brightness value of the afterimage displayed by the display after the afterimage test, and an absolute value of the difference between the brightness value and the brightness value of the display before the afterimage test is used as the brightness difference corresponding to the brightness value;
  • the image displayed by the display during the afterimage test is black and white
  • the residual image of the corresponding black image and the residual image corresponding to the white image after the afterimage test are corresponding to the residual image of the corresponding black image in the group.
  • the absolute value of the difference in luminance values of the afterimage of the white screen is used as the luminance difference corresponding to the luminance value of the group.
  • the first determining module 71 may be configured to: if the afterimage displayed by the display has more than two brightness values after the afterimage test, then for one of the images a brightness value, determining a brightness change index corresponding to the brightness value according to the brightness difference corresponding to the brightness value, multiplying the brightness change index corresponding to the brightness value and the area index of the afterimage having the brightness value to obtain an afterimage corresponding to the brightness value Index; determining the afterimage level based on the result obtained by adding the afterimage indices corresponding to all the luminance values.
  • the first determination module 71 can be used to select the region block having the afterimage from all the regions of the screen displayed by the display after the afterimage test. And determining a brightness value corresponding to each of the area blocks having the afterimage; wherein each of the area blocks of the picture displayed by the display includes only the afterimage of the black picture or the afterimage containing only the white picture or does not contain any afterimage
  • the area block having the same brightness value in all the area blocks is divided into one afterimage area; the afterimage area of one black picture and the afterimage area of one white picture are divided into one afterimage group for one of the afterimage groups, and the group is black inside
  • the difference between the luminance values of the afterimages corresponding to the afterimage regions of the picture and the afterimage regions of the white picture is the brightness difference corresponding to the group; wherein, the brightness values corresponding to the afterimage regions of the black picture in the same group and the pictures displayed by the display before the afterimage test
  • the second determining module 72 is configured to determine, according to a luminance difference value corresponding to the afterimage group, a brightness change index corresponding to the brightness difference value, and a brightness change index corresponding to the afterimage group and an area index corresponding to the afterimage group. Multiplying to obtain the afterimage index corresponding to the afterimage group; determining the afterimage level of the display according to the result obtained by adding the afterimage indices corresponding to all the afterimage groups.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may employ an entirely hardware embodiment, an entirely software embodiment, Or in the form of an embodiment of the software and hardware aspects. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种确定显示器残像等级的方法及装置，用以解决现有技术中只能通过人眼观测确定显示器的残像等级，准确性较低的问题。一种确定残像等级的方法，包括：确定进行残像测试后显示器显示的残像的亮度变化指数及所述残像的面积指数；根据确定的所述亮度变化指数及面积指数确定所述显示器的残像等级。由于残像的亮度变化指数与面积指数都是可以客观确定的，因而可以不必采用人眼观测的方式，而从客观上确定显示器的残像等级，提高了确定显示器残像等级的准确性。

Description

一种确定显示器残像等级的方法及装置 技术领域
本发明的实施例涉及显示技术领域， 尤其涉及一种确定显示器残像等级 的方法及装置。 背景技术
随着平板显示器的普及， 消费者对于平板显示器的要求越来越高， 平板 显示器制造商也越来越注重产品品质的提升， 其中， 残像问题一直影响着平 板显示器的画面品质。
残像， 是当显示器长时间显示一个画面后切换到其它画面时， 显示器上 会残留原来画面的残影。 其中， 液晶显示器作为平板显示器的一种， 当长时 间显示一个画面后， 在外加电场作用下会有残余电荷， 这些残余电荷使得液 晶显示器切换到其它画面后不能及时显示新的画面， 还残留原画面的残影， 从而影响液晶显示器的显示效果， 同样的现象也会出现在等离子电视等其他 平板显示器中。
目前， 现有技术主要通过与残像等级样本进行目视比较评定残像等级， 这种通过人眼确定残像等级的方法具有艮强的主观性， 时常因人与人视觉差 异而造成判定结果的差异， 使得不同的人确定的残像等级存在差异， 无法准 确地确定显示器画面品质，从而使制造者无法有针对性地进行显示器的改进。
综上， 目前只能通过人眼观测确定显示器的残像等级， 准确性较低。 发明内容
本发明实施例提供一种确定显示器残像等级的方法及装置， 用以解决现 有技术中只能通过人眼观测确定显示器的残像等级， 准确性较低的问题。
本发明实施例提供的一种确定残像等级的方法， 该方法包括： 确定进行 残像测试后显示器显示的残像的亮度变化指数及所述残像的面积指数， 其中 所述残像的亮度变化指数为进行残像测试后显示器显示的残像的亮度差值与 进行残像测试前显示器的亮度值的百分比， 所述残像的面积指数是残像面积 占用显示器显示面积的百分比； 根据确定的所述亮度变化指数及面积指数确 定所述显示器的残像等级。
在一实例中， 所述残像测试前显示器的亮度值为所述显示器在显示单一 颜色值的画面时的亮度值。
在一实例中， 根据确定的所述亮度变化指数及面积指数确定显示器的残 像等级， 包括根据确定的残像的亮度变化指数与面积指数的乘积确定显示器 的残像等级。
在一实例中， 根据以下步骤确定残像的亮度差值：
若显示器在残像测试时显示的画面为具有单一颜色值的画面， 则针对残 像测试后显示器显示的残像的一个亮度值， 将该亮度值与残像测试前显示器 的亮度值的差值的绝对值作为该亮度值对应的亮度差值；
若显示器在残像测试时显示的画面为黑色和白色两种画面， 则针对残像 测试后的一组对应黑色画面的残像和对应白色画面的残像的亮度值， 将该组 中对应黑色画面的残像与对应白色画面的残像的亮度值的差值的绝对值作为 该组亮度值对应的亮度差值。
在一实例中， 若显示器在残像测试时显示的画面为具有单一颜色值的画 面， 则根据确定的所述亮度变化指数及面积指数确定显示器的残像等级， 包 括： 若在残像测试后， 显示器显示的残像具有两个以上的亮度值， 则针对其 中一个亮度值， 根据该亮度值对应的亮度差值确定该亮度值对应的亮度变化 指数， 将该亮度值对应的亮度变化指数和具有该亮度值的残像的面积指数相 乘得到该亮度值对应的残像指数； 根据所有亮度值对应的残像指数相加得到 的结果， 确定所述残像等级。
在一实例中，若显示器在残像测试时显示的画面为黑色和白色两种画面， 确定每组亮度值对应的亮度差值包括： 从残像测试后显示器显示的画面的所 有区域块中选择具有残像的区域块， 并确定其中每个具有残像的区域块对应 的亮度值， 其中所述所有区域块中的每个区域块只包含黑色画面的残像或只 包含白色画面的残像或不包含任何残像； 将所述所有区域块中具有相同亮度 值的区域块划分为一个残像区域； 将一个黑色画面的残像区域与一个白色画 面的残像区域划分为一个残像组， 针对其中一个残像组， 将该组内黑色画面 的残像区域与白色画面的残像区域对应的残像的亮度值之差作为对应该组的 亮度差值， 其中， 同组内黑色画面的残像区域对应的亮度值和残像测试前显 示器显示的画面的亮度值的差值的绝对值与白色画面的残像区域对应的亮度 值和残像测试前显示器显示的画面的亮度值的差值的绝对值之差在设定范围 内；
根据确定的所述亮度变化指数及面积指数确定显示器的残像等级，包括： 针对一个残像组， 根据该残像组对应的亮度差值确定该亮度差值对应的 亮度变化指数， 将该残像组对应的亮度变化指数和该残像组对应的面积指数 相乘得到该残像组对应的残像指数； 根据所有残像组对应的残像指数相加得 到的结果， 确定所述残像等级。
本发明实施例提供的一种确定残像等级的装置， 包括：
第一确定模块， 用于确定进行残像测试后显示器显示的残像的亮度变化 指数及所述残像的面积指数， 其中所述残像的亮度变化指数为进行残像测试 后显示器显示的残像的亮度差值与进行残像测试前显示器的亮度值的百分 比， 所述残像的面积指数是残像面积占用显示器显示面积的百分比；
第二确定模块， 用于根据确定的所述亮度变化指数及面积指数确定所述 显示器的残像等级。
在一实例中， 所述第一确定模块确定的残像测试前显示器的亮度值为所 述显示器在显示单一颜色值的画面时的亮度值。
在一实例中， 所述第二确定模块根据确定的残像的亮度变化指数与面积 指数的乘积确定显示器的残像等级。
在一实例中， 所述第一确定模块用于： 若显示器在残像测试时显示的画 面为具有单一颜色值的画面， 则针对残像测试后显示器显示的残像的一个亮 度值， 将该亮度值与残像测试前显示器的亮度值的差值的绝对值作为该亮度 值对应的亮度差值； 若显示器在残像测试时显示的画面为黑色和白色两种画 面， 则针对残像测试后的一组对应黑色画面的残像和对应白色画面的残像的 亮度值， 将该组中对应黑色画面的残像与对应白色画面的残像的亮度值的差 值的绝对值作为该组亮度值对应的亮度差值。
在一实例中， 若显示器在残像测试时显示的画面为具有单一颜色值的画 面， 则所述第一确定模块用于： 若在残像测试后， 显示器显示的残像具有两 个以上的亮度值， 则针对其中一个亮度值， 根据该亮度值对应的亮度差值确 定该亮度值对应的亮度变化指数， 将该亮度值对应的亮度变化指数和具有该 亮度值的残像的面积指数相乘得到该亮度值对应的残像指数， 并且根据所有 亮度值对应的残像指数相加得到的结果， 确定所述残像等级。
在一实例中，若显示器在残像测试时显示的画面为黑色和白色两种画面， 则所述第一确定模块用于： 从残像测试后显示器显示的画面的所有区域块中 选择具有残像的区域块， 并确定其中每个具有残像的区域块对应的亮度值， 其中所述所有区域块中每个区域块只包含黑色画面的残像或只包含白色画面 的残像或不包含任何残像； 将所述所有区域块中具有相同亮度值的区域块划 分为一个残像区域； 将一个黑色画面的残像区域与一个白色画面的残像区域 划分为一个残像组， 其中针对其中一个残像组， 将该组内黑色画面的残像区 域与白色画面的残像区域对应的残像的亮度值之差作为对应该组的亮度差 值， 其中， 同组内黑色画面的残像区域对应的亮度值和残像测试前显示器显 示的画面的亮度值的差值的绝对值， 与白色画面的残像区域对应的亮度值和 残像测试前显示器显示的画面的亮度值的差值的绝对值之差在设定范围内； 所述第二确定模块用于： 针对一个残像组， 根据该残像组对应的亮度差 值确定该亮度差值对应的亮度变化指数， 将该残像组对应的亮度变化指数和 该残像组对应的面积指数相乘得到该残像组对应的残像指数； 根据所有残像 组对应的残像指数相加得到的结果， 确定所述残像等级。
本发明实施例通过确定进行残像测试后显示的残像的亮度变化指数及所 述残像的面积指数来确定显示器的残像等级， 其中所述残像的亮度变化指数 为进行残像测试后显示器显示的残像的亮度差值与进行残像测试前显示器的 亮度值的百分比，残像的面积指数是残像面积占用显示器显示面积的百分比， 由于残像的亮度变化指数与面积指数都是可以客观确定的， 因而采用本发明 实施例可以不必采用人眼主观观测的方式， 而可以从客观上确定显示器的残 像等级， 进而提高了确定显示器残像等级的准确性。 附图说明
图 1为本发明实施例提供的采用黑色棋盘格画面对显示器进行残像测试 后， 显示器显示的具有残像的画面示意图；
图 2为本发明实施例采用黑白相间的棋盘格画面对显示器进行残像测试 后， 显示器显示的具有残像的画面示意图；
图 3为在残像测试后， 显示器显示具有单一亮度值的残像的示意图； 图 4为在残像测试后， 显示器显示具有多个亮度值的残像的示意图； 图 5为本发明实施例提供的确定残像等级的装置结构图。 具体实施方式
本发明实施例通过确定进行残像测试后显示的残像的亮度变化指数及所 述残像的面积指数来确定显示器的残像等级， 其中所述残像的亮度变化指数 为进行残像测试后显示器显示的残像的亮度差值与进行残像测试前显示器的 亮度值的百分比，残像的面积指数是残像面积占用显示器显示面积的百分比， 由于残像的亮度变化指数与面积指数都是可以客观确定的， 因而采用本发明 实施例可以不必采用人眼观测的方式， 而可以从客观上确定显示器的残像等 级， 提高了确定显示器残像等级的准确性。
下面结合说明书附图对本发明实施例作进一步详细描述。
本发明实施例提供的确定残像等级的方法包括以下步骤：
S101 : 确定进行残像测试后显示器显示的残像的亮度变化指数及残像的 面积指数； 其中， 残像的亮度变化指数为进行残像测试后显示器显示的残像 的亮度差值与进行残像测试前显示器的亮度值的百分比； 残像的面积指数是 残像面积占用显示器显示面积的百分比；
S102: 根据确定的残像的亮度变化指数及面积指数确定显示器的残像等 级。
例如， 残像测试前显示器的亮度值为显示器在显示单一颜色值的画面时 的亮度值。
步骤 S101 中， 对显示器进行残像测试前， 可以在显示器上显示单一颜 色值的画面， 也即颜色值唯一的画面， 如可选择颜色值为 （ 127, 127, 127 ) 的全灰画面， 之后， 可以采用光学测试设备测试此时显示器的亮度值； 进行 残像测试时的测试画面可选择颜色值唯一且亮度值与残像测试前不同的画 面， 如可选择颜色值为（0, 0, 0 )的全黑画面， 或选择颜色值为（255, 255, 255 )的全白画面； 测试画面还可选择具有两种不同颜色值的画面， 如选择同 时具有黑色区域和白色区域的测试画面， 例如， 测试画面可选择黑白相间的 棋盘格画面。 在测试结束后， 将显示画面切换至残像测试前显示的画面， 如 切换至之前颜色值为（ 127, 127, 127 )的全灰画面， 则此时显示器显示的画 面就可能存在残像， 根据残像的亮度变化指数与面积指数可确定显示器的残 像等级。
例如， 根据确定的亮度变化指数及面积指数确定显示器的残像等级， 包 括：
根据确定的残像的亮度变化指数与面积指数的乘积确定显示器的残像等 级。
在一实施例中， 残像的亮度变化指数与面积指数可以分别用来表示残像 的等级， 也即可以只通过亮度变化指数来为显示器确定残像等级或只通过面 积指数来为显示器确定残像等级， 还可以综合考虑残像的亮度变化指数与面 积指数， 即根据亮度变化指数与面积指数的乘积确定显示器的残像等级， 这 里将亮度变化指数与面积指数的乘积称为残像指数， 在一实施例中， 可以根 据实际情况预先设置不同的残像指数所属的残像等级， 如将残像指数在 0.1 以下的设为一级残像， 将残像指数在 0.1~0.2之间的设为二级残像等， 残像 等级越高表示显示器的显示效果越差。
例如， 确定显示器的亮度差值的方式可以有以下两种：
方式一、 若显示器在残像测试时显示的画面为具有单一颜色值的画面， 则针对残像测试后显示器显示的残像的一个亮度值， 将该亮度值与残像测试 前显示器的亮度值的差值的绝对值作为该亮度值对应的亮度差值；
在一实施例中， 若测试画面为颜色值唯一的画面， 则残像测试后显示器 显示的残像的亮度差值可以为残像测试后显示器显示的残像的亮度值与残像 测试前显示器的亮度值之差的绝对值， 需要说明的是， 若残像测试后显示的 残像亮度值唯一， 则这里的亮度差值只有一个， 若残像测试后显示的残像具 有多个亮度值， 则将残像的每个亮度值分别与残像测试前的亮度值相减取绝 对值， 得到对应每个亮度值的亮度差值， 即这时显示器显示的残像的亮度差 值有多个。 这里， 残像画面具有多个亮度值， 可以是指残像画面具有多个亮 度平均值； 即， 将显示器显示的画面划分为多个区域块， 在残像测试后确定 残像区域块， 每个残像区域块具有一个亮度平均值， 所有的残像区域块共具 有多个不同的亮度平均值， 这里的区域块可以是棋盘格等。 例如， 若显示器在残像测试时显示的画面为具有单一颜色值的画面， 则 根据确定的亮度变化指数及面积指数确定显示器的残像等级， 包括：
若在残像测试后， 显示器显示的残像具有两个以上的亮度值， 则针对其 中一个亮度值， 根据该亮度值对应的亮度差值确定该亮度值对应的亮度变化 指数， 将该亮度值对应的亮度变化指数和具有该亮度值的残像的面积指数相 乘得到该亮度值对应的残像指数；
根据所有亮度值对应的残像指数相加得到的结果， 确定残像等级。 在一实施例中， 当残像测试后显示器显示的残像具有两个以上的亮度值 时， 针对其中的每一个亮度值， 根据上述步骤确定每一个亮度值对应的残像 指数， 并将所有亮度值对应的残像指数相加， 根据相加后的结果确定显示器 的残像等级。 其中， 这里的亮度值可以是亮度平均值； 如， 残像测试前显示 器显示的为颜色值为（ 127 , 127 , 127 )的全灰画面， 且测试前显示器的亮度 值为 Y, 残像测试时的测试画面为黑色棋盘格， 残像测试后， 即经过残像测 试并将显示器显示画面的颜色值切换到残像测试前的颜色值后， 显示器显示 的为具有残像的画面， 如图 2所示， 为采用黑色棋盘格画面对显示器进行残 像测试后， 显示器显示的具有残像的画面， 其中， 每个棋盘格具有一个亮度 平均值， 有 10个棋盘格显示的为残像， 具有 Y(bl)、 Y(b2)共两个亮度平均 值， 即残像测试后显示器显示的残像具有两个亮度值； 针对亮度值 Y(bl) , 该亮度值对应的亮度变化指数 Al= \Y(bl) - Y\ / Y , 具有亮度值 Y(bl)的棋盘格 为 6个， 由于显示器显示的总面积为 15个棋盘格， 亮度值 Y(bl)对应的面积 指数 Bl=6/15 , 同理， 亮度值 Y(b2)对应的亮度变化指数
Figure imgf000008_0001
- ;r|/ ;r , 对 应的面积指数 B2=4/15 , 则该显示器显示的残像的所有亮度值对应的残像指 数的和为： SQ = A1 X JB1 + A2 X JB2 , ^据得到的 SQ值确定显示器的残像等级。
方式二、 若显示器在残像测试时显示的画面为黑色和白色两种画面， 则 针对残像测试后的一组对应黑色画面的残像和对应白色画面的残像的亮度 值， 根据该组中对应黑色画面的残像与对应白色画面的残像的亮度值的差值 的绝对值确定该组亮度值对应的亮度差值。
在一实施例中， 若测试画面为黑色和白色两种画面， 则残像测试后显示 器的亮度差值可以为两种画面在残像测试后的残像的亮度值之差。 例如， 若 残像测试后显示器显示的黑色画面的残像和白色画面的残像分别具有单一亮 度值， 则可直接将黑色画面的残像的亮度值与白色画面的残像的亮度值之差 的绝对值作为显示器显示的残像的亮度差值； 若残像测试后显示器显示的黑 色画面的残像和白色画面的残像分别具有多个亮度值， 或黑色画面与白色画 面中的其中种画面的残像具有多个亮度值，则可根据它们分别具有的亮度值， 将残像测试后显示器显示的残像画面划分为不同的残像组， 每组内， 黑色画 面的残像具有相同的亮度值， 白色画面的残像具有相同的亮度值， 且同组内 黑色画面与白色画面的残像的体现程度是相接近的， 也即， 黑色画面的残像 的亮度值与残像测试前显示器的亮度值之差的绝对值和白色画面的残像的亮 度值与残像测试前显示器的亮度值之差的绝对值是相近的。
例如， 若显示器在残像测试时显示的画面为黑色和白色两种画面， 确定 每组亮度值对应的亮度差值包括： 块， 并确定其中每个具有残像的区域块对应的亮度值； 所有区域块中每个区 域块只包含黑色画面的残像或只包含白色画面的残像；
将所有区域块中具有相同亮度值的区域块划分为一个残像区域； 将一个黑色画面的残像区域与一个白色画面的残像区域划分为一个残像 组， 针对其中一个残像组， 将该组内黑色画面的残像区域与白色画面的残像 区域对应的残像的亮度值之差作为对应该组的亮度差值； 其中， 同组内黑色 画面的残像区域对应的亮度值与残像测试前显示器显示的画面的亮度值的差 值的绝对值， 与白色画面的残像区域对应的亮度值与残像测试前显示器显示 的画面的亮度值的差值的绝对值之差可以在设定范围内；
根据确定的亮度变化指数及面积指数确定显示器的残像等级， 包括： 针对一个残像组， 根据该残像组对应的亮度差值确定该亮度差值对应的 亮度变化指数， 将该残像组对应的亮度变化指数和该残像组对应的面积指数 相乘得到该残像组对应的残像指数；
根据所有残像组对应的残像指数相加得到的结果， 确定显示器的残像等 级。
在一实施例中， 上述步骤中的区域块可以是条格形的， 圓形的， 方形的 等等， 例如， 可以是如图 2和 3所示的棋盘格， 图中， 每个棋盘格区域对应 一个亮度值， 这里的亮度值是指每个棋盘格区域对应的所有像素点的亮度平 均值； 残像测试后黑色画面的残像和白色画面的残像可能分别只具有一个亮 度值， 这时， 分别确定出黑色画面残像与白色画面残像的亮度值之差， 进而 确定出亮度变化指数及残像的面积指数，从而可以确定出显示器的残像指数。 若残像测试后， 黑色画面和白色画面中至少有一个画面的残像具有两个以上 的亮度值， 则可在确定出具有残像的区域块及每个区域块的亮度值后， 将具 有相同亮度值的区域块划分为一个残像区域， 由于黑色画面的残像与白色画 面的残像亮度值不同， 黑色画面的残像与白色画面的残像分别属于不同的残 像区域， 这时， 为每个黑色画面的残像区域选择与之匹配的白色画面的残像 区域， 将这两个区域划分为一个残像组， 将一个残像组内黑色画面的残像与 白色画面的残像的亮度值之差的绝对值作为该残像组对应的亮度差值， 进而 可以确定该残像组对应的亮度变化指数。 如图 3所示， 为采用黑白相间的棋 盘格画面对显示器进行残像测试后， 显示器显示的具有残像的画面， 在显示 器显示的画面的共 15个区域块中， 有 10个区域块显示的为残像， Y(bl)、 Y(b2)为黑色画面的残像的亮度值， Y(wl)、 Y(w2)为白色画面的残像的亮度 值， 将亮度值同为 Y(bl)的区域块划分为一个残像区域， 同样地， 将亮度值 同为 Y(b2)、 Y(wl)、 Y(w2)的区域块分别划分为一个残像区域， 确定出与黑 色画面的残像相匹配的白色画面的残像， 将它们划分为一个残像组， 如亮度 值为 Y(bl)的黑色画面的残像和亮度值为 Y(wl)的白色画面的残像为残像组 一，而亮度值为 Y(b2)的黑色画面的残像和亮度值为 Y(w2)的白色画面的残像 为残像组二， 这里， 一个残像组内黑色画面的残像与白色画面的残像所体现 的残影程度是相近的， 也即， 黑色画面的残像与残像测试前显示器的亮度值 之差的绝对值和白色画面的残像与残像测试前显示器的亮度值之差的绝对值 之差可以是在设定范围内的， 或者是相近的。 如图 3所示， 残像组一和残像 组二的面积指数分别为 6/15和 4/15,则显示器所有残像组对应的残像指数的 和 S 为：
Figure imgf000010_0001
根据确定出的 SQ值，及预先设定的残像指数与残像等级的对应关系， 即 可确定显示器的残像等级。
本发明实施例采用黑白相间的棋盘格画面对显示器进行残像测试以确定 显示器残像等级的方法包括以下步骤：
S401: 在显示器上显示具有单一颜色值的画面， 并测试此时显示器的亮 度值；
在一实施例中， 可选择图 5和 6所示颜色值为 （ 127,127,127 ) 的全灰画 面， 使用光学测试设备测试此时显示器的亮度值丫。
S402: 采用黑白相间的棋盘格画面对显示器进行残像测试；
如图 5和图 6所示棋盘格画面。
S403: 在残像测试后将显示器画面切换至残像测试前的画面， 若此时显 示器显示的为图 5所示的具有单一颜色值的残像， 则切换到步骤 S404, 若此 时显示器显示的为图 6所示的具有多个颜色值的残像， 则切换到步骤 S406; 如图 5所示， 为在残像测试后， 显示器显示具有单一亮度值的残像的示 意图； 如图 6所示， 为在残像测试后， 显示器显示具有多个亮度值的残像的 示意图。
S404： 测试原黑白相间的棋盘格画面中黑格与白格的残像的亮度值 Y(b)、 Y(w), 并确定显示的残像的面积指数 B, 转换至步骤 S405;
S405: 根据以下公式确定显示器的残像指数 Q, 并根据确定的残像指数 确定显示器的残像等级：
Figure imgf000011_0001
S406: 测试原黑白棋盘格处黑格的残像的多个亮度值及白格的残像的多 个亮度值；
如图 6所示， 黑格的残像的亮度值为 Y(bl)、 Y(b2), 白格的残像的亮度 值为 Y(wl)、 Y(w2);
S407: 根据黑白格的残像的亮度值与残像测试前显示器的亮度值的差值 的绝对值， 将对应一个亮度值的所有黑格的残像与对应一个亮度值的所有白 格的残像划分为一个残像组；
如， |F(W)-F|的值与 的值接近， 而 |y(b2)-:r|的值与 |y(w2)-:r|的值 接近， 则可将 Y(bl)与 Y(wl)划分为残像组一， 将 Y(b2)与 Y(w2)划分为残像 组二；
S408: 针对一个残像组， 根据该残像组对应的亮度差值确定该亮度差值 对应的亮度变化指数， 将该残像组对应的亮度变化指数和该残像组对应的面 积指数相乘得到该残像组对应的残像指数；
S409: 根据所有残像组对应的残像指数相加得到的结果， 确定显示器的 残像等级；
如图 6中， 残像组一对应的残像的面积指数为 B 1 , 残像组二对应的残像 的面积指数为 B2 , 则所有残像组对应的残像指数的和 SQ为：
Figure imgf000012_0001
最后， 根据确定的 SQ值确定显示器的残像等级， 如当显示器的 SQ值为
0.1以下时，则确定显示器的残像等级为一级或确定显示器的残像等级是合格 的。
基于同一发明构思， 本发明实施例中还提供了一种与确定显示器残像等 级的方法对应的确定残像等级的装置， 由于该装置解决问题的原理与本发明 实施例确定残像等级的方法相似， 因此该装置的实施可以参见方法的实施， 重复之处不再赘述。
如图 7所示，为本发明实施例提供的确定残像等级的装置结构图， 包括： 第一确定模块 71 ,用于确定进行残像测试后显示器显示的残像的亮度变 化指数及显示的残像的面积指数， 其中残像的亮度变化指数为进行残像测试 后显示器显示的残像的亮度差值与进行残像测试前显示器的亮度值的百分 比， 残像的面积指数是残像面积占用显示器显示面积的百分比；
第二确定模块 72 ,用于根据确定的显示的残像的亮度变化指数及面积指 数确定显示器的残像等级。
本发明实施例确定显示器残像等级的装置可以是由光学测试设备、 残像 测试设备及计算机控制设备等组成的一套装置， 也可以是集成了光学测试功 能、 残像测试功能及控制、 计算等功能的一个装置。
例如，第一确定模块 71确定的残像测试前显示器的亮度值为显示器在显 示单一颜色值的画面时的亮度值。
例如， 第二确定模块 72, 可以用于根据确定的残像的亮度变化指数与面 积指数的乘积确定显示器的残像等级。
例如，第一确定模块 71可以用于若显示器在残像测试时显示的画面为具 有单一颜色值的画面， 则针对残像测试后显示器显示的残像的一个亮度值， 将该亮度值与残像测试前显示器的亮度值的差值的绝对值作为该亮度值对应 的亮度差值； 若显示器在残像测试时显示的画面为黑色和白色两种画面， 则 针对残像测试后的一组对应黑色画面的残像和对应白色画面的残像的亮度 值， 将该组中对应黑色画面的残像与对应白色画面的残像的亮度值的差值的 绝对值作为该组亮度值对应的亮度差值。
例如， 若显示器在残像测试时显示的画面为具有单一颜色值的画面， 则 第一确定模块 71可以用于若在残像测试后，显示器显示的残像具有两个以上 的亮度值， 则针对其中一个亮度值， 根据该亮度值对应的亮度差值确定该亮 度值对应的亮度变化指数， 将该亮度值对应的亮度变化指数和具有该亮度值 的残像的面积指数相乘得到该亮度值对应的残像指数； 根据所有亮度值对应 的残像指数相加得到的结果， 确定所述残像等级。
例如， 若显示器在残像测试时显示的画面为黑色和白色两种画面， 贝' J : 第一确定模块 71 可以用于从残像测试后显示器显示的画面的所有区域 块中选择具有残像的区域块， 并确定其中每个具有残像的区域块对应的亮度 值； 其中， 显示器显示的画面的所有区域块中的每个区域块只包含黑色画面 的残像或只包含白色画面的残像或不包含任何残像； 将该所有区域块中具有 相同亮度值的区域块划分为一个残像区域； 将一个黑色画面的残像区域与一 个白色画面的残像区域划分为一个残像组针对其中一个残像组， 将该组内黑 色画面的残像区域与白色画面的残像区域对应的残像的亮度值之差作为对应 该组的亮度差值； 其中， 同组内黑色画面的残像区域对应的亮度值与残像测 试前显示器显示的画面的亮度值的差值的绝对值， 与白色画面的残像区域对 应的亮度值与残像测试前显示器显示的画面的亮度值的差值的绝对值之差在 设定范围内；
第二确定模块 72可以用于针对一个残像组，根据该残像组对应的亮度差 值确定该亮度差值对应的亮度变化指数， 将该残像组对应的亮度变化指数和 该残像组对应的面积指数相乘得到该残像组对应的残像指数； 根据所有残像 组对应的残像指数相加得到的结果， 确定显示器的残像等级。
本领域内的技术人员应明白， 本发明的实施例可提供为方法、 系统、 或 计算机程序产品。 因此， 本发明可采用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且， 本发明可采用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等）上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 装置（系统） 、 和计算机程序 产品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程 图和 /或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中的流 程和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算 机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器， 使 得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现 在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功 能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中， 使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品， 该指令装置实现在流程图一个流程或 多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上， 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的 处理， 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图 一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步 骤。
尽管已描述了本发明的优选实施例， 但本领域内的技术人员一旦得知了 基本创造性概念， 则可对这些实施例作出另外的变更和修改。 所以， 所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

权利要求书
1、 一种确定显示器残像等级的方法， 其中， 该方法包括：
确定进行残像测试后显示器显示的残像的亮度变化指数及所述残像的面 积指数， 其中所述残像的亮度变化指数为进行残像测试后显示器显示的残像 的亮度差值与进行残像测试前显示器的亮度值的百分比， 所述残像的面积指 数是残像面积占用显示器显示面积的百分比；
根据确定的所述亮度变化指数及面积指数确定所述显示器的残像等级。
2、如权利要求 1所述的方法， 其中， 所述残像测试前显示器的亮度值为 所述显示器在显示单一颜色值的画面时的亮度值。
3、如权利要求 1所述的方法， 其中，根据确定的所述亮度变化指数及面 积指数确定显示器的残像等级， 包括：
根据确定的残像的亮度变化指数与面积指数的乘积确定显示器的残像等 级。
4、如权利要求 1所述的方法，其中，根据以下步骤确定残像的亮度差值： 若显示器在残像测试时显示的画面为具有单一颜色值的画面， 则针对残 像测试后显示器显示的残像的一个亮度值， 将该亮度值与残像测试前显示器 的亮度值的差值的绝对值作为该亮度值对应的亮度差值；
若显示器在残像测试时显示的画面为黑色和白色两种画面， 则针对残像 测试后的一组对应黑色画面的残像和对应白色画面的残像的亮度值， 将该组 中对应黑色画面的残像与对应白色画面的残像的亮度值的差值的绝对值作为 该组亮度值对应的亮度差值。
5、如权利要求 4所述的方法， 其中， 若显示器在残像测试时显示的画面 为具有单一颜色值的画面， 则根据确定的所述亮度变化指数及面积指数确定 显示器的残像等级， 包括：
若在残像测试后， 显示器显示的残像具有两个以上的亮度值， 则针对其 中一个亮度值， 根据该亮度值对应的亮度差值确定该亮度值对应的亮度变化 指数， 将该亮度值对应的亮度变化指数和具有该亮度值的残像的面积指数相 乘得到该亮度值对应的残像指数；
根据所有亮度值对应的残像指数相加得到的结果， 确定所述残像等级。
6、如权利要求 4所述的方法， 其中， 若显示器在残像测试时显示的画面 为黑色和白色两种画面， 确定每组亮度值对应的亮度差值包括： 块， 并确定其中每个具有残像的区域块对应的亮度值， 其中所述所有区域块 中的每个区域块只包含黑色画面的残像或只包含白色画面的残像或不包含任 何残像；
将所述所有区域块中具有相同亮度值的区域块划分为一个残像区域； 将一个黑色画面的残像区域与一个白色画面的残像区域划分为一个残像 组， 针对其中一个残像组， 将该组内黑色画面的残像区域与白色画面的残像 区域对应的残像的亮度值之差作为对应该组的亮度差值， 其中， 同组内黑色 画面的残像区域对应的亮度值和残像测试前显示器显示的画面的亮度值的差 值的绝对值， 与白色画面的残像区域对应的亮度值和残像测试前显示器显示 的画面的亮度值的差值的绝对值之差在设定范围内；
根据确定的所述亮度变化指数及面积指数确定显示器的残像等级，包括： 针对一个残像组， 根据该残像组对应的亮度差值确定该亮度差值对应的 亮度变化指数， 将该残像组对应的亮度变化指数和该残像组对应的面积指数 相乘得到该残像组对应的残像指数；
根据所有残像组对应的残像指数相加得到的结果， 确定所述残像等级。
7、 一种确定显示器残像等级的装置， 其中， 该装置包括：
第一确定模块， 用于确定进行残像测试后显示器显示的残像的亮度变化 指数及所述残像的面积指数， 其中所述残像的亮度变化指数为进行残像测试 后显示器显示的残像的亮度差值与进行残像测试前显示器的亮度值的百分 比， 所述残像的面积指数是残像面积占用显示器显示面积的百分比；
第二确定模块， 用于根据确定的所述亮度变化指数及面积指数确定所述 显示器的残像等级。
8、如权利要求 7所述的装置， 其中， 所述第一确定模块确定的残像测试 前显示器的亮度值为所述显示器在显示单一颜色值的画面时的亮度值。
9、如权利要求 7所述的装置， 其中， 所述第二确定模块根据确定的残像 的亮度变化指数与面积指数的乘积确定显示器的残像等级。
10、 如权利要求 7所述的装置， 其中， 所述第一确定模块用于： 若显示 器在残像测试时显示的画面为具有单一颜色值的画面， 则针对残像测试后显 示器显示的残像的一个亮度值， 将该亮度值与残像测试前显示器的亮度值的 差值的绝对值作为该亮度值对应的亮度差值； 若显示器在残像测试时显示的 画面为黑色和白色两种画面， 则针对残像测试后的一组对应黑色画面的残像 和对应白色画面的残像的亮度值， 将该组中对应黑色画面的残像与对应白色 画面的残像的亮度值的差值的绝对值作为该组亮度值对应的亮度差值。
11、如权利要求 10所述的装置， 其中， 若显示器在残像测试时显示的画 面为具有单一颜色值的画面， 则所述第一确定模块用于： 若在残像测试后， 显示器显示的残像具有两个以上的亮度值， 则针对其中一个亮度值， 根据该 亮度值对应的亮度差值确定该亮度值对应的亮度变化指数， 将该亮度值对应 的亮度变化指数和具有该亮度值的残像的面积指数相乘得到该亮度值对应的 残像指数， 并且根据所有亮度值对应的残像指数相加得到的结果， 确定所述 残像等级。
12、如权利要求 10所述的装置， 其中， 若显示器在残像测试时显示的画 面为黑色和白色两种画面， 则所述第一确定模块用于： 从残像测试后显示器 显示的画面的所有区域块中选择具有残像的区域块， 并确定其中每个具有残 像的区域块对应的亮度值， 其中所述所有区域块中每个区域块只包含黑色画 面的残像或只包含白色画面的残像或不包含任何残像； 将所述所有区域块中 具有相同亮度值的区域块划分为一个残像区域； 将一个黑色画面的残像区域 与一个白色画面的残像区域划分为一个残像组， 其中针对其中一个残像组， 将该组内黑色画面的残像区域与白色画面的残像区域对应的残像的亮度值之 差作为对应该组的亮度差值， 其中， 同组内黑色画面的残像区域对应的亮度 值和残像测试前显示器显示的画面的亮度值的差值的绝对值， 与白色画面的 残像区域对应的亮度值和残像测试前显示器显示的画面的亮度值的差值的绝 对值之差在设定范围内；
所述第二确定模块用于： 针对一个残像组， 根据该残像组对应的亮度差 值确定该亮度差值对应的亮度变化指数， 将该残像组对应的亮度变化指数和 该残像组对应的面积指数相乘得到该残像组对应的残像指数； 根据所有残像 组对应的残像指数相加得到的结果， 确定所述残像等级。
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