WO2019119793A1 - Procédé d'excitation et dispositif d'excitation pour dispositif d'affichage - Google Patents

Procédé d'excitation et dispositif d'excitation pour dispositif d'affichage Download PDF

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Publication number
WO2019119793A1
WO2019119793A1 PCT/CN2018/096029 CN2018096029W WO2019119793A1 WO 2019119793 A1 WO2019119793 A1 WO 2019119793A1 CN 2018096029 W CN2018096029 W CN 2018096029W WO 2019119793 A1 WO2019119793 A1 WO 2019119793A1
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pixel
sub
value
gamma value
target
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PCT/CN2018/096029
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English (en)
Chinese (zh)
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何怀亮
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惠科股份有限公司
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

Definitions

  • the present application belongs to the field of display technologies, and in particular, to a driving method and a driving device for a display device.
  • LCD liquid crystal display
  • the direct-lit LCD screen has the disadvantage that the phenomenon of large-viewing is more serious, and this disadvantage is inherent in the design of the direct-lit LCD screen, that is, the design structure of the direct-lit LCD screen itself cannot cause color shift at a large viewing angle. Completely eliminated.
  • the embodiments of the present application provide a driving method and a driving device for a display device to improve the color shift phenomenon of the current display device under a large viewing angle.
  • the embodiment of the present application provides a driving method of a display device, including:
  • the gamma values and the first sub-pixels in the preset area are respectively adjusted according to the preset condition.
  • the gamma value of the two sub-pixels is such that the gamma value of the adjusted first sub-pixel is greater than the gamma value of the first sub-pixel before the adjustment, and the adjusted gamma value of the second sub-pixel is greater than that before the adjustment.
  • the embodiment of the present application further provides a driving device for a display device, including:
  • Obtaining a module configured to obtain a grayscale of a sub-pixel corresponding to each pixel unit in the preset area
  • a data feature value calculation module configured to calculate data feature values of the plurality of gray levels corresponding to each sub-pixel in the preset area according to the gray level of the sub-pixel;
  • the processing module is configured to adjust, according to the preset condition, the first sub-pixel in the preset area according to the preset condition, if the data feature value of the plurality of gray levels corresponding to each sub-pixel in the preset area meets a preset condition
  • the initial gamma value is the target gamma value of the first sub-pixel
  • the initial gamma value of the second sub-pixel is the target gamma value of the second sub-pixel.
  • the embodiment of the present application further provides a driving method of a display device, including:
  • the gamma values and the first sub-pixels in the preset area are respectively adjusted according to the preset condition.
  • the gamma value of the two sub-pixels is such that the gamma value of the adjusted first sub-pixel is greater than the gamma value of the first sub-pixel before the adjustment, and the adjusted gamma value of the second sub-pixel is greater than that before the adjustment.
  • the gamma value of the first sub-pixel before adjustment is used as the initial gamma value of the first sub-pixel, and the gamma value of the adjusted first sub-pixel is used as the target gamma value of the first sub-pixel, and the The gamma value of the second sub-pixel is used as the initial gamma value of the second sub-pixel, and the adjusted gamma value of the second sub-pixel is used as the target gamma value of the second sub-pixel;
  • the g R represents a data feature value of a plurality of gray levels of the third sub-pixel in the preset area;
  • the g G represents a data feature value of a plurality of gray levels of the first sub-pixel in the preset area,
  • the g B a data feature value indicating a plurality of gray levels of the second sub-pixel in the preset area,
  • the ⁇ 'G represents a gamma value of the adjusted first sub-pixel, and the ⁇ 'B represents the adjusted second sub-pixel Gamma value.
  • the embodiment of the present application further provides a terminal device, including a memory, a processor, and a computer program stored in the memory and operable on the processor, the processor implementing the computer program to implement the present application
  • a terminal device including a memory, a processor, and a computer program stored in the memory and operable on the processor, the processor implementing the computer program to implement the present application
  • the embodiment of the present application further provides a computer readable storage medium storing a computer program, which when executed by one or more processors, implements the first aspect of the embodiments of the present application. The steps of the method.
  • the embodiment of the present application first obtains the gray scales of the sub-pixels (the third sub-pixel, the first sub-pixel, the second sub-pixel, or the R, G, B) corresponding to each pixel unit in the preset area;
  • the pixel unit has a grayscale value of the third subpixel, a grayscale value of the first subpixel, and a grayscale value of the second subpixel, which are respectively calculated according to the obtained grayscale of the subpixel of each pixel unit.
  • the data feature value of the plurality of grayscale values corresponding to each sub-pixel when the data feature value of the plurality of grayscale values corresponding to each sub-pixel meets a preset condition, the preset condition refers to a serious color shift phenomenon under a large viewing angle
  • the range value of the gray scale of the three sub-pixels is used to increase the input gamma signal of the first sub-pixel and the second sub-pixel in the sub-pixel, thereby increasing the gamma value of the first sub-pixel and the second sub-pixel
  • the brightness ratio of the first sub-pixel and the second sub-pixel at a large viewing angle decreases relative to the third sub-pixel, and the third sub-pixel is more vivid with respect to the adjusted first sub-pixel and the second sub-pixel, thereby Improve color cast under large viewing angles.
  • 1 is a variation of a large viewing angle and a frontal role bias of various representative color systems of a liquid crystal display
  • FIG. 2 is a schematic flow chart showing an implementation of a driving method of a display device according to an embodiment of the present application
  • FIG. 3 is a schematic flowchart showing an implementation of a driving method of a display device according to another embodiment of the present application.
  • Figure 4 is a graph showing the change in visual role difference under the condition of 60° horizontal viewing angle under different red color mixing conditions
  • FIG. 5 is a schematic block diagram of a driving apparatus of a display device according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • the term “if” can be interpreted as “when” or “on” or “in response to determining” or “in response to detecting” depending on the context. .
  • the phrase “if determined” or “if detected [condition or event described]” may be interpreted in context to mean “once determined” or “in response to determining” or “once detected [condition or event described] ] or “in response to detecting [conditions or events described]”.
  • color shift refers to the fact that the hue and saturation of a certain color in an image are significantly different from the real image.
  • the color shift phenomenon at a large viewing angle refers to the image that people see at a large viewing angle.
  • the third sub-pixel with R, the first sub-pixel with G, and the second sub-pixel with B we will denote the third sub-pixel with R, the first sub-pixel with G, and the second sub-pixel with B.
  • Fig. 1 is a variation of the large viewing angle and the frontal role of various representative color systems of the liquid crystal display. It is found by Fig. 1 that the color shift phenomenon of the red, green, and blue hue is larger than that of other colors. Serious, therefore, we can improve the overall color shift under large viewing angle by solving the color-shift defects of the R, G, and B hue in the display.
  • the liquid crystal material of the liquid crystal display panel itself does not emit light, but emits light through a light source under the liquid crystal material.
  • the liquid crystal display panel is composed of a plurality of pixel units, each pixel unit represents an image signal, wherein each pixel unit is composed of three liquid crystal cells, wherein each cell has red (R) under it. , Green (G), Blue (B) filters (or directly use R, G, B as backlights), so that different colors of light can be displayed on the screen through different cells.
  • Each of the three cells in each pixel unit has a separate driving signal, and the ratio of the plurality of sub-pixels can be adjusted by a separate driving signal, so that each pixel unit can exhibit different colors.
  • FIG. 2 is a schematic diagram of an implementation process of a driving method of a display device according to an embodiment of the present disclosure. As shown in the figure, the method may include the following steps:
  • Step S201 Acquire gray scales of sub-pixels corresponding to each pixel unit in the preset area.
  • the liquid crystal display panel is composed of a plurality of pixel units, if the color shift efficiency of each pixel unit is adjusted to be very low, we can first divide the liquid crystal display panel into multiple partitions, each of which The partition is internally composed of multiple pixel units, and the partition size can be set according to the actual situation. For example, the display is divided into multiple partitions (L rows, H columns), each partition can be used as a small area, then the display is equivalent to L ⁇ H small areas. We select one of the small areas as the preset area. This small area is located in the Mth column of the Nth row. The value range of the N is: 1 ⁇ N ⁇ L, and the value range of the M is: 1 ⁇ M ⁇ H.
  • the preset area is represented by (N, M), and the value range of N is: 1 ⁇ N ⁇ 5
  • the value range of M is: 1 ⁇ M ⁇ 8, and N and M both represent integers.
  • the preset area (N, M) can be represented by (3, 6).
  • different ways of representing the preset area can be evolved. If one of the partitions can be composed of pixel units of the i column and the j row, then the partition has i ⁇ j pixel units. We exemplify the method of the embodiment of the present application by adjusting the color shift in one partition.
  • the preset area is one of the partitions, and the partition is internally composed of a plurality of pixel units, and each pixel unit is composed of three sub-pixels (R, G, B), and each sub-pixel has a corresponding gray scale value.
  • the gray scale represents the level of different brightness from the darkest to the brightest, and can represent 256 brightness levels, which can be represented by a value of 0-255. We first obtain the grayscale value corresponding to each subpixel in each pixel unit.
  • Step S202 Calculate data feature values of the plurality of gray levels corresponding to each sub-pixel in the preset area according to the gray level of the sub-pixel.
  • the grayscale in each pixel unit of each subpixel (for example, the subpixel corresponding to the red color). Value, such that each sub-pixel gets i ⁇ j grayscale values.
  • the data feature value is a value that can be used to characterize a set of data, or a value that can characterize a data analysis feature.
  • the average value may be used as the data feature value of a set of data, that is, the average value of the plurality of gray levels corresponding to each sub-pixel may be obtained, and the average value may include an arithmetic mean, an addend average, and a geometry. Average number. It should be noted that the data feature value may also include a variance, or an arithmetic mean after removing the abnormal gray scale data, and the like, and is not limited herein.
  • Step S203 If the data feature values of the plurality of gray levels corresponding to each sub-pixel in the preset area meet the preset condition, adjust the gamma value of G in the sub-pixel in the preset area according to the preset condition. And the gamma value of B such that the adjusted gamma value of G is greater than the gamma value of G before adjustment, and the adjusted gamma value of B is larger than the gamma value of B before adjustment.
  • the preset condition is that the data feature value of the gray level corresponding to each sub-pixel is severe under the condition.
  • the input signal, output represents the output signal, and the gamma value ⁇ is a power exponent and is also referred to as a gamma.
  • Equivalent adjustment of the input signal can be achieved by adjusting the gamma value to change the output signal without changing the input signal, or by changing the gamma value without changing the input signal.
  • the video source data received by the display is not changed, the image of the video presented to the user is changed by adjusting the gamma value, or the image of the video seen by the user is changed, and the changes are expressed in brightness and color. etc.
  • the RX, GY, and BZ ratios of the mixed color of the positive viewing angle and the large viewing angle are completely different, that is, the same grayscale value (input parameter signal) is compared at a large viewing angle.
  • the ratio of the brightness between R and G, R and B which is exhibited under the positive viewing angle becomes larger.
  • the ratio of the blue hue and the green hue to the red hue cannot be ignored at a large viewing angle, resulting in a red at a large viewing angle.
  • the hue is not as good as the red hue under the positive viewing angle, so the color shift phenomenon occurs under the large viewing angle.
  • the equivalent gray scale of B becomes smaller, so that the equivalent gray scale of G and B is compared with R at a large viewing angle. The gray scale is getting smaller. The red hue can be seen again.
  • To make the equivalent gray scale of G and B smaller, it is necessary to increase the gamma values of G and B. Since output input ⁇ , we assume that the input signal is a grayscale value. After the gamma value changes, the grayscale changes appear. This grayscale is equivalent to the equivalent grayscale. This example is used to explain the equivalent. Gray scale, not the gray scale change caused by the change of the input signal, but the gamma value is adjusted so that the presented output signal or the displayed brightness value changes.
  • the data feature values of the plurality of gray levels corresponding to the sub-pixels are obtained, and if the data feature values of the plurality of gray levels corresponding to the sub-pixels exhibit a color-shift phenomenon under a large viewing angle, the gamma values of the G and B are obtained.
  • the equivalent gray scale of G and B will become smaller, and the difference between the equivalent gray scale of G and B and the data characteristic value of R gray scale will become larger, so that R The color looks more vivid, so the color shift phenomenon at a large viewing angle will be significantly improved.
  • FIG. 3 is a schematic flowchart of an implementation of a driving method of a display device according to another embodiment of the present invention. After the step S203, the method may further include the following steps:
  • Step S301 the gamma value of G before adjustment is taken as the initial gamma value of G, the gamma value of the adjusted G is used as the target gamma value of G, and the gamma value of B before adjustment is used as the initial gamma of B.
  • the gamma value of G before adjustment is taken as the initial gamma value of G, and the adjusted G
  • the gamma value is taken as the target gamma value of G
  • the gamma value of B before adjustment is taken as the initial gamma value of B
  • the adjusted gamma value of B is taken as the target gamma value of B.
  • Step S302 acquiring a brightness value corresponding to the initial gamma value of the G and a brightness value corresponding to the target gamma value of the G.
  • the color gamut phenomenon at a large viewing angle is improved by adjusting the gamma values of G and B
  • G and The brightness of B is changed, so the color of G and B changes under the positive viewing angle, so the color combined by R, G, B also changes, so we need to obtain the initial gamma value corresponding to G.
  • the brightness value corresponds to the brightness value corresponding to the target gamma value of G, and the brightness is changed in order to restore the brightness value under the positive viewing angle, and the performance of the original color is not affected by adjusting the gamma value of G.
  • the luminance value corresponding to the initial gamma value of the G is obtained by the following formula:
  • the luminance value corresponding to the target gamma value of the G is obtained by the following formula:
  • the L N, M G represents a luminance value corresponding to an initial gamma value of the G
  • the L′ N, M G represents a luminance value corresponding to a target gamma value of the G
  • the LG (255) represents The gray scale of G is a luminance value at 255
  • g G represents a data feature value of the gray scale of G in each pixel unit in the preset region
  • ⁇ G represents an initial gamma value of G
  • ⁇ 'G represents G
  • the target gamma value is not limited to this;
  • the target gamma value of G is greater than the initial gamma value of G , and g G is a value of ⁇ 255, L' N, M G is actually darkened relative to L N , M G That is, after the gamma value of G is increased, the brightness of G is dimmed. It should be noted that the above is only one way of obtaining the brightness value corresponding to the initial gamma value of G and the brightness value corresponding to the target gamma value of G. In practical applications, it may also be acquired according to other methods.
  • Step S303 calculating, according to the brightness value corresponding to the initial gamma value of the G and the brightness value corresponding to the target gamma value of the G, a backlight target brightness signal value of G in the corresponding backlight sub-pixel in the preset area.
  • the presentation of the brightness is driven by the input luminance signal, and the change in the luminance value also needs to be adjusted to the magnitude of the luminance signal value. Therefore, we can calculate the brightness value of the backlight target according to the brightness value corresponding to the initial gamma value of G and the brightness value corresponding to the target gamma value of the G and the current backlight brightness signal value, and the backlight target brightness signal value can make The brightness exhibited by the G at the positive viewing angle is restored to the brightness presented before the gamma value of the G is adjusted.
  • the backlight target brightness of G in the corresponding backlight sub-pixel in the preset area may be calculated according to the brightness value corresponding to the initial gamma value of the G and the brightness value corresponding to the target gamma value of the G.
  • the signal value is specifically:
  • the A' N, M G represents a backlight target luminance signal value of the G in the corresponding backlight sub-pixel in the preset area
  • a N, M G represents the current backlight luminance signal value of the G in the corresponding backlight sub-pixel in the preset area
  • L N, M G represents a luminance value corresponding to an initial gamma value of G in a sub-pixel in the preset area
  • the L′ N, M G represents a target gamma of G in three sub-pixels in the preset area.
  • the brightness value corresponding to the value, wherein the N, M respectively represent the number of rows and the number of columns in the plurality of divided regions of the preset region.
  • the backlight target luminance signal value of G is specifically:
  • Step S304 acquiring a brightness value corresponding to the initial gamma value of the B and a brightness value corresponding to the target gamma value of the B.
  • step S302 obtains a luminance value corresponding to the initial gamma value of G and a luminance value corresponding to the target gamma value of G, which is the initial gamma of the acquired B.
  • the calculation method is the same and will not be described here.
  • the obtaining the brightness value corresponding to the initial gamma value of the B and the brightness value corresponding to the target gamma value of the B may include:
  • the brightness value corresponding to the initial gamma value of B is obtained by the following formula:
  • the brightness value corresponding to the target gamma value of the B is obtained by the following formula:
  • the L N, M B represents a luminance value corresponding to an initial gamma value of the B
  • the L′ N, M B represents a luminance value corresponding to a target gamma value of the B
  • the LB (255) represents The gray scale of B is a luminance value at 255
  • g B represents a data feature value of the gray scale of B in each pixel unit in the preset region
  • ⁇ B represents an initial gamma value of B
  • ⁇ 'B represents B
  • the target gamma value is not limited to this.
  • Step S305 calculating, according to the brightness value corresponding to the initial gamma value of the B and the brightness value corresponding to the target gamma value of the B, obtaining a backlight target brightness signal value of B in the corresponding backlight sub-pixel in the preset area.
  • step S303 is similar to that in step S303, except that the backlight target luminance signal value of G is calculated in step S303, and this step calculates the backlight target luminance signal value of B. I will not repeat them here.
  • the backlight target brightness of the B in the corresponding backlight sub-pixel in the preset area may be calculated according to the brightness value corresponding to the initial gamma value of the B and the brightness value corresponding to the target gamma value of the B.
  • the signal value is specifically:
  • the A' N, M B represents the backlight target luminance signal value of the B in the corresponding backlight sub-pixel in the preset area
  • a N, M B represents the current backlight luminance signal value of the B in the corresponding backlight sub-pixel in the preset area
  • L N, M B represents a luminance value corresponding to an initial gamma value of B in the sub-pixel in the preset area
  • the L′ N, M B represents a target gamma value corresponding to B in the sub-pixel in the preset area.
  • the brightness value, the N, M respectively represent the number of rows and the number of columns of the preset area in the divided plurality of areas.
  • the backlight target luminance signal value of B is obtained by the following formula:
  • the backlight backlight target luminance signal value of G can be obtained by replacing various parameters of G with various parameters of B. Specifically, the backlight target luminance signal value of G is calculated first, or the backlight target luminance signal value of B is calculated first, and the backlight target luminance signal value of G and the backlight target luminance signal value of B may be simultaneously calculated.
  • Fig. 4 is a view showing the change of the visual character difference under the condition of different color mixing of the 60 degree horizontal viewing angle
  • the abscissa is the gray scale of G and B
  • the ordinate is the color shift, as shown in the figure, when the R (red) gray scale is 255
  • G (green) and B (blue) gray scales are between 0 and 255
  • the color shift of the R hue is more serious as the G and B gray scale signals decrease.
  • the red gray scale is 200
  • the G and B gray scales are between 0 and 180 gray scales.
  • the lower the gray scale signals of G and B the more severe the color shift of the red hue.
  • the red gray scale is 160
  • the G and B gray scales are between 0 and 160 gray scales.
  • the red gray scale is 100
  • the gray scales of G and B are between 0 and 100 gray scales.
  • the three sub-pixels in the preset area are respectively adjusted according to the preset condition.
  • the gamma value of G and the gamma value of B are specifically:
  • the g R represents a data feature value of a plurality of gray levels of R in the preset area
  • the g G represents a data feature value of a plurality of gray levels of the G in the preset area
  • the g B represents the B in the preset area.
  • the data feature values of the plurality of gray scales the ⁇ 'G represents the gamma value of the adjusted G
  • the ⁇ 'B represents the gamma value of the adjusted B.
  • the values of ⁇ 'G and ⁇ 'B are different for different preset conditions, and ⁇ G 1 , ⁇ G 2 ... represent different gamma values, but are not limited thereto.
  • different preset conditions may be set according to the gray scale range of the sub-pixels when the color shift is severe under a large viewing angle, and different target gamma values are set corresponding to different preset conditions, and each corresponding target gamma value is corresponding. It is not necessary to be larger than the initial gamma value. It is determined according to the grayscale values of R, G, and B in the preset conditions.
  • the target gamma value can also be an empirical value. After adjusting the target gamma value, it will improve. Color shift phenomenon, setting different target gamma values may improve the degree of color shift phenomenon.
  • a plurality of preset conditions are set by comparing the color shift conditions under the different color mixing conditions of the red and the different viewing angles, and the target gamma value is set for each preset condition, because the preset condition Basically, the range of the grayscale value of the sub-pixel in the case where the color shift phenomenon is severe is covered, so that the G- and G-gamma are adjusted according to the preset condition as long as the data feature value of the grayscale value of the sub-pixel meets the preset condition.
  • the value can improve the color shift phenomenon at a large viewing angle.
  • FIG. 5 is a schematic block diagram of a driving device of a display device according to an embodiment of the present application. For convenience of description, only parts related to the embodiments of the present application are shown.
  • the driving device 5 of the display device may be a software unit, a hardware unit or a combination of soft and hard units built in a terminal device (display, television, etc.), or may be integrated into the terminal device as a separate pendant.
  • the driving device 5 of the display device comprises:
  • the obtaining module 51 is configured to acquire a grayscale of a sub-pixel corresponding to each pixel unit in the preset area;
  • the data feature value calculation module 52 is configured to separately calculate data feature values of the plurality of gray levels corresponding to each sub-pixel in the preset area according to the gray level of the sub-pixel;
  • the processing module 53 is configured to: if the data feature values of the plurality of gray levels corresponding to each sub-pixel in the preset area meet the preset condition, adjust the G in the sub-pixels in the preset area according to the preset condition
  • the initial gamma value is the target gamma value of G
  • the initial gamma value of B is the target gamma value of B.
  • it also includes:
  • a luminance value obtaining module 54 of the first sub-pixel configured to use a gamma value of G before adjustment as an initial gamma value of G, a gamma value of the adjusted G as a target gamma value of G, and acquire the a luminance value corresponding to an initial gamma value of G and a luminance value corresponding to a target gamma value of the G;
  • a backlight target luminance signal value determining module 55 of the first sub-pixel configured to calculate, according to the luminance value corresponding to the initial gamma value of the G and the luminance value corresponding to the target gamma value of the G, a backlight target luminance signal value of G in the pixel;
  • the brightness value obtaining module 56 of the second sub-pixel is configured to use the gamma value of B before adjustment as the initial gamma value of B, and the gamma value of the adjusted B as the target gamma value of B, and obtain the a brightness value corresponding to the initial gamma value of B and a brightness value corresponding to the target gamma value of B;
  • a backlight target luminance signal value determining module 57 of the second sub-pixel configured to calculate, according to the luminance value corresponding to the initial gamma value of the B and the luminance value corresponding to the target gamma value of the B, The backlight target luminance signal value of B in the pixel.
  • the backlight target luminance signal value determining module 55 of the first sub-pixel is specifically configured to:
  • the A' N, M G represents a backlight target luminance signal value of the G in the corresponding backlight sub-pixel in the preset area
  • a N, M G represents the current backlight luminance signal value of the G in the corresponding backlight sub-pixel in the preset area
  • L N, M G represents a luminance value corresponding to an initial gamma value of G in a sub-pixel in the preset area
  • the L′ N, M G represents a target gamma value corresponding to G in the sub-pixel in the preset area.
  • the brightness value, the N, M respectively represent the number of rows and columns of the preset area in the divided plurality of areas
  • the backlight target luminance signal value determining module 57 of the second sub-pixel is specifically configured to:
  • the A' N, M B represents the backlight target luminance signal value of the B in the corresponding backlight sub-pixel in the preset area
  • a N, M B represents the current backlight luminance signal value of the B in the corresponding backlight sub-pixel in the preset area
  • L N, M B represents a luminance value corresponding to an initial gamma value of B in the sub-pixel in the preset area
  • the L′ N, M B represents a target gamma value corresponding to B in the sub-pixel in the preset area.
  • the brightness value, the N, M respectively represent the number of rows and the number of columns of the preset area in the divided plurality of areas.
  • the brightness value obtaining module 54 of the first sub-pixel includes:
  • the initial luminance value obtaining unit 541 of the first sub-pixel is configured to obtain a luminance value corresponding to the initial gamma value of the G by using the following formula:
  • the target luminance value obtaining unit 542 of the first sub-pixel is configured to obtain a luminance value corresponding to the target gamma value of the G by using the following formula:
  • the L N, M G represents a luminance value corresponding to an initial gamma value of the G
  • the L′ N, M G represents a luminance value corresponding to a target gamma value of the G
  • the LG (255) represents The gray scale of G is a luminance value at 255
  • g G represents a data feature value of the gray scale of G in each pixel unit in the preset region
  • ⁇ G represents an initial gamma value of G
  • ⁇ 'G represents G Target gamma value
  • the brightness value obtaining module 56 of the second sub-pixel includes:
  • the initial luminance value obtaining unit 561 of the second sub-pixel is configured to obtain a luminance value corresponding to the initial gamma value of the B by using the following formula:
  • the target luminance value obtaining unit 562 of the second sub-pixel is configured to obtain the luminance value corresponding to the target gamma value of the B by using the following formula:
  • the L N, M B represents a luminance value corresponding to an initial gamma value of the B
  • the L′ N, M B represents a luminance value corresponding to a target gamma value of the B
  • the LB (255) represents The gray scale of B is a luminance value at 255
  • g B represents a data feature value of the gray scale of B in each pixel unit in the preset region
  • ⁇ B represents an initial gamma value of B
  • ⁇ 'B represents B Target gamma value.
  • processing module 53 is specifically configured to:
  • the g R represents a data feature value of a plurality of gray levels of R in the preset area
  • the g G represents a data feature value of a plurality of gray levels of the G in the preset area
  • the g B represents the B in the preset area.
  • the data feature values of the plurality of gray scales, the ⁇ 'G represents the gamma value of the adjusted G, and the ⁇ 'B represents the gamma value of the adjusted B.
  • the data feature values include: an arithmetic mean, an addend average, a geometric mean, and a variance.
  • each functional module and unit in the embodiment may be integrated into one processing module, or each module or unit may exist physically separately, or two or more units may be integrated into one module, and the integrated module and unit are It can be implemented in the form of hardware, or it can be implemented in the form of software function modules and units.
  • FIG. 6 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 6 of this embodiment includes: one or more processors 60, a memory 61, and a computer program 62 stored in the memory 61 and operable on the processor 60.
  • the steps in the embodiment of the driving method of each of the above display devices are implemented, for example, steps S201 to S203 shown in FIG.
  • the processor 60 executes the computer program 62 the functions of the modules in the driving device embodiment of the above display device, such as the functions of the modules 51 to 53 shown in FIG. 5, are implemented.
  • the terminal device is a display, it should also include a display panel.
  • the computer program 62 can be partitioned into one or more modules/units that are stored in the memory 61 and executed by the processor 60 to complete This application.
  • the one or more modules/units may be a series of computer program instruction segments capable of performing a particular function, the instruction segments being used to describe the execution of the computer program 62 in the terminal device 6.
  • the computer program 62 can be segmented into an acquisition module, a data feature value calculation module, and a processing module.
  • the acquiring module is configured to acquire a grayscale of a sub-pixel corresponding to each pixel unit in the preset area
  • the data feature value calculation module is configured to separately calculate data feature values of the plurality of gray levels corresponding to each sub-pixel in the preset area according to the gray level of the sub-pixel;
  • the processing module is configured to: if the data feature values of the plurality of gray levels corresponding to each sub-pixel in the preset area meet the preset condition, adjust the sub-pixels in the preset area according to the preset condition
  • the initial gamma value of G is the target gamma value of G
  • the initial gamma value of B is the target gamma value of B.
  • the terminal device includes but is not limited to the processor 60 and the memory 61. It will be understood by those skilled in the art that FIG. 6 is only an example of the terminal device 6, and does not constitute a limitation of the terminal device 6, and may include more or less components than those illustrated, or combine some components or different components.
  • the terminal device may further include an input device, an output device, a network access device, a bus, and the like.
  • the processor 60 may be a central processing unit (CPU), or may be another general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like, which is a control center of the terminal device, and connects various parts of the entire terminal device using various interfaces and lines.
  • the memory 61 may be an internal storage unit of the terminal device 6, such as a hard disk or a memory of the terminal device 6.
  • the memory 61 may also be an external storage device of the terminal device 6, for example, a plug-in hard disk equipped on the terminal device 6, a smart memory card (SMC), and a secure digital (SD). Card, flash card, etc. Further, the memory 61 may also include both an internal storage unit of the terminal device 6 and an external storage device.
  • the memory 61 is used to store the computer program and other programs and data required by the terminal device.
  • the memory 61 can also be used to temporarily store data that has been output or is about to be output.
  • the disclosed terminal device, the driving device and the driving method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated modules/units if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the present application implements all or part of the processes in the foregoing embodiments, and may also be completed by a computer program to instruct related hardware.
  • the computer program may be stored in a computer readable storage medium. The steps of the various method embodiments described above may be implemented when the program is executed by the processor.
  • the computer program comprises computer program code, which may be in the form of source code, object code form, executable file or some intermediate form.
  • the computer readable medium may include any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM). , random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. It should be noted that the content contained in the computer readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in a jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, computer readable media It does not include electrical carrier signals and telecommunication signals.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un procédé d'excitation et un dispositif d'excitation (5) pour un dispositif d'affichage, ledit procédé consistant à : acquérir les échelles de gris de sous-pixels correspondant à chaque unité de pixel dans une zone prédéfinie (S201) ; calculer, en fonction des échelles de gris des sous-pixels, des valeurs de caractéristiques de données d'une pluralité d'échelles de gris correspondant à chaque sous-pixel dans la zone prédéfinie, respectivement (S202) ; et si les valeurs de caractéristiques de données de la pluralité d'échelles de gris correspondant à chaque sous-pixel dans la zone prédéfinie satisfont une condition prédéfinie, ajuster, selon la condition prédéfinie, des valeurs gamma de premiers sous-pixels et des valeurs gamma de seconds sous-pixels dans la zone prédéfinie, respectivement, de telle sorte que les valeurs gamma des premiers sous-pixels après ajustement soient supérieures aux valeurs gamma de ceux-ci avant ajustement et que les valeurs gamma des seconds sous-pixels après ajustement soient supérieures aux valeurs gamma de ceux-ci avant ajustement (S203).
PCT/CN2018/096029 2017-12-20 2018-07-17 Procédé d'excitation et dispositif d'excitation pour dispositif d'affichage WO2019119793A1 (fr)

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CN107863083B (zh) * 2017-12-20 2019-12-13 惠科股份有限公司 一种显示装置的驱动方法及驱动装置
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