WO2022006753A1 - 显示控制装置及其确定背光区光强的方法 - Google Patents

显示控制装置及其确定背光区光强的方法 Download PDF

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Publication number
WO2022006753A1
WO2022006753A1 PCT/CN2020/100707 CN2020100707W WO2022006753A1 WO 2022006753 A1 WO2022006753 A1 WO 2022006753A1 CN 2020100707 W CN2020100707 W CN 2020100707W WO 2022006753 A1 WO2022006753 A1 WO 2022006753A1
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image area
image
gray value
target gray
area
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PCT/CN2020/100707
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English (en)
French (fr)
Inventor
方力
邵寅亮
曾少青
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北京凯视达科技股份有限公司
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Priority to CN202080003290.9A priority Critical patent/CN112543968B/zh
Priority to PCT/CN2020/100707 priority patent/WO2022006753A1/zh
Publication of WO2022006753A1 publication Critical patent/WO2022006753A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • G09G3/342Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix

Definitions

  • the present disclosure relates to the technical field of backlight displays, and in particular, to a display control device and a method for determining the light intensity of a backlight area.
  • Backlit displays typically include a backlight panel and a liquid crystal display panel (LCD).
  • the liquid crystal display panel is composed of a color filter substrate having red, green and blue color filter patterns and a liquid crystal layer.
  • Backlight panels consist of light emitting diodes (LEDs) or fluorescent light sources.
  • the liquid crystal display panel itself does not have light-emitting properties.
  • the liquid crystal display panel is illuminated by a backlight and selectively filters some colors, thereby displaying images of different colors.
  • the commonly used backlight panels are edge-type backlight panels or direct-type backlight panels.
  • the light intensity distribution information of the entire backlight panel is obtained by lighting the LED lamps on the entire backlight panel, and the video image signal is processed based on the light intensity distribution information of the backlight panel to display the video image on the liquid crystal display panel. Since the light intensity distribution information of the backlight board is obtained when the LED lights on the entire backlight board are lit, the backlight brightness of the backlight board cannot be dynamically adjusted with the change of the display content, so that when the image display content is dark, the backlight The utilization rate of light intensity of the board is not high, resulting in energy waste. In addition, the transmittance of the liquid crystal display panel cannot be adjusted to 0%, resulting in poor contrast when the liquid crystal display displays video images.
  • the purpose of the present disclosure is to provide a display control device and a method for determining the light intensity of a backlight area, so as to adjust the light intensity of each backlight area on the backlight panel according to the image video to be displayed, and improve the light intensity utilization rate of the backlight panel.
  • a display control device including one or more integrated circuits
  • the one or more integrated circuits include:
  • a display main control circuit configured to receive an image video signal, and determine the initial transmittance and initial brightness corresponding to each pixel on the display according to the image video signal;
  • the processing unit is used to calculate the grayscale value of each pixel in the image according to the received image video signal, and for each image area, determine the grayscale value of each pixel in the image area.
  • the target grayscale value of the image area according to the target grayscale value of each of the image areas, respectively determining the light intensity of each backlight area on the backlight panel corresponding to each of the image areas;
  • an adjustment circuit for determining the brightness corresponding to each pixel on the display according to the light intensity of each of the backlight areas on the backlight panel, and adjusting the transmittance of the pixel according to the brightness of each pixel ratio, so that the product of the brightness and transmittance corresponding to each pixel on the display is equal to the product of the initial brightness and the initial transmittance of the pixel.
  • processing unit is specifically used for:
  • For each of the image areas determine the first target gray value of the image area according to the gray value of each pixel in the image area;
  • the light intensity of each of the backlight areas on the backlight panel corresponding to each of the image areas is determined according to the target grayscale value of each of the image areas.
  • the processing unit before using the first target gray value of each of the image areas as the target gray value of the corresponding image area, the processing unit is further configured to:
  • the first target gray value is smoothed to obtain the second target gray value of the image area and the part of the adjacent image area of the image area, so that the image area and the part of the image area are adjacent to each other.
  • the difference percentages between the second target grayscale values of the image area are all within a preset percentage range;
  • the second target gray value of the image area and the part of the adjacent image area of the image area corresponds to the first target gray value of the image area and the part of the adjacent image area of the image area, until smoothing is performed for all of the image regions.
  • the processing unit performs smoothing processing on the first target grayscale values of all the image regions according to a first preset direction and/or a second preset direction.
  • the processing unit performs smoothing processing on the first target gray value of each of the image areas and the partial adjacent image areas of the image area according to the first preset direction, to obtain respectively:
  • the second target gray value of the image area and the part of the adjacent image area of the image area includes:
  • the first target gray value and the smooth gray value is used as the second target gray value of the image area.
  • the processing unit performs smoothing processing on the first target gray value of each of the image areas and the partial adjacent image areas of the image area according to the second preset direction, and obtains respectively:
  • the second target gray value of the image area and the part of the adjacent image area of the image area includes:
  • the first target gray value and the smooth gray value is used as the second target gray value of the image area.
  • a method for determining the light intensity of a backlight area the method being applied to the processing unit in any one of the display control devices in the above-mentioned first part, the method comprising:
  • the gray value of each pixel in the image is calculated, and for each image area, the target gray value of the image area is determined according to the gray value of each pixel in the image area. degree value;
  • the light intensity of each backlight area on the backlight panel corresponding to each image area is determined respectively.
  • determining the target gray value of the image area according to the gray value of each pixel in the image area including:
  • For each of the image areas determine the first target gray value of the image area according to the gray value of each pixel in the image area;
  • the light intensity of each of the backlight areas on the backlight panel corresponding to each of the image areas is determined according to the target grayscale value of each of the image areas.
  • the method before using the first target grayscale value of each of the image areas as the target grayscale value of the corresponding image area, the method includes:
  • the first target gray value is smoothed to obtain the second target gray value of the image area and the part of the adjacent image area of the image area, so that the image area and the part of the image area are adjacent to each other.
  • the difference percentages between the second target grayscale values of the image area are all within a preset percentage range;
  • the second target gray value of the image area and the part of the adjacent image area of the image area corresponds to the first target gray value of the image area and the part of the adjacent image area of the image area, until smoothing is performed for all of the image regions.
  • smoothing is performed on the first target grayscale values of all the image regions according to a first preset direction and/or a second preset direction.
  • smoothing is performed on the first target gray value of each of the image areas and the part of the adjacent image areas of the image area according to the first preset direction, to obtain the image area and
  • the second target gray value of the part of the adjacent image area of the image area includes:
  • the first target gray value and the smooth gray value is used as the second target gray value of the image area.
  • smoothing is performed on the first target gray value of each of the image areas and the part of the adjacent image areas of the image area according to the second preset direction, to obtain the image area and
  • the second target gray value of the part of the adjacent image area of the image area includes:
  • the first target gray value and the smooth gray value is used as the second target gray value of the image area.
  • a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the steps of any one of the above-mentioned methods in the second part.
  • the processing unit can calculate the gray value of each pixel in each frame of the image and video according to the received image video signal.
  • the target gray value of the image area can be determined according to the gray value of each pixel in the image area
  • the target gray value of each image area can be determined according to the target gray value of each image area.
  • the light intensity of each backlight area on the backlight panel corresponding to the image area.
  • each image area corresponds to each pixel area on the display
  • each pixel area on the display corresponds to each backlight area on the backlight panel.
  • each backlight area on the backlight panel can be adjusted separately according to each frame of image in the image video to be displayed, and each backlight area on the backlight panel can be dynamically adjusted according to the change of consecutive frame images in the image video. Therefore, the utilization rate of the light intensity of the backlight plate is improved, and the problems existing in the related art are solved.
  • FIG. 1 is a schematic structural diagram of a display control apparatus according to an exemplary embodiment of the present disclosure.
  • Fig. 2 is a flowchart of specific execution steps of a processing unit according to an exemplary embodiment of the present disclosure.
  • FIG. 3 is a schematic diagram showing an image after being divided into multiple image regions according to an exemplary embodiment of the present disclosure.
  • FIG. 4 is a flowchart of a method for determining the light intensity of a backlight area according to an exemplary embodiment of the present disclosure.
  • Backlit displays generally include a backlight panel and a liquid crystal display panel.
  • the liquid crystal display panel is composed of a color filter substrate having red, green and blue color filter patterns and a liquid crystal layer.
  • the backlight panel consists of light-emitting diodes or fluorescent light sources.
  • the liquid crystal display panel itself does not have light-emitting properties.
  • the liquid crystal display panel is illuminated by a backlight and selectively filters some colors, thereby displaying images of different colors.
  • the commonly used backlight panels are edge-type backlight panels or direct-type backlight panels.
  • the light intensity distribution information of the entire backlight panel is obtained by lighting the LED lamps on the entire backlight panel, or the light intensity distribution information of the entire backlight panel is fitted based on the performance parameters of each LED lamp.
  • the distribution information processes the video image signal to display the video image on the liquid crystal display panel. Since the light intensity distribution information of the backlight board is obtained when the LED lights on the entire backlight board are lit, the backlight brightness of the backlight board cannot be dynamically adjusted with the change of the display content, so that when the display content is dark, the backlight board The utilization rate of light intensity is not high, resulting in energy waste. In addition, the transmittance of the liquid crystal display panel cannot be adjusted to 0%, resulting in poor contrast when the liquid crystal display displays video images.
  • embodiments of the present disclosure provide a display control device and a method for determining the light intensity of a backlight area, so as to adjust the light intensity of each backlight area on the backlight panel according to the image video to be displayed, and improve the light intensity of the backlight panel.
  • the purpose of strong utilization is to adjust the light intensity of each backlight area on the backlight panel according to the image video to be displayed, and improve the light intensity of the backlight panel.
  • each pixel on the display in the subsequent embodiments of the present disclosure represents each pixel on a display panel (LCD) of the display.
  • LCD display panel
  • the display control apparatus 100 includes one or more integrated circuits;
  • the one or more integrated circuits include: a display main control circuit 101, configured to receive an image and video signal, and determine the initial transmittance and initial brightness corresponding to each pixel on the display according to the image and video signal
  • the processing unit 102 is used to calculate the grayscale value of each pixel in the image according to the received image video signal, and for each image area, according to the grayscale value of each pixel in the image area Determine the target gray value of the image area, and determine the light intensity of each backlight area on the backlight panel corresponding to each image area according to the target gray value of each image area;
  • the adjustment circuit 103 uses The brightness corresponding to each pixel on the display is determined according to the light intensity of each of the backlight areas on the backlight panel, and the transmittance of each pixel is adjusted according to the brightness of each pixel, so that the The product of the brightness and transmittance corresponding to each pixel on the display is equal to the product of the initial brightness and the initial transmittance of the pixel.
  • the display main control circuit 101 receives an image video signal to be displayed, and determines, according to the image video signal, on the display when displaying an image on the display The initial transmittance of each pixel, and the corresponding initial brightness of each pixel under the initial light intensity of the backlight.
  • each backlight area on the backlight panel can be divided into multiple backlight areas of the same size, and each backlight area includes multiple light emitting diodes or fluorescent light sources. It is not difficult to understand that each backlight area on the direct type backlight panel corresponds to one pixel area on the display. When each frame of the video image is displayed on the display, each pixel area on the display corresponds to one image area in each frame of the image. That is, each backlight area corresponds to an image area in the image to be displayed.
  • the processing unit 102 calculates the gray value of each pixel in the image for each frame of image in the image and video signal according to the received image and video signal. For each image area of the image, the target gray value of the image area is determined according to the gray value of each pixel in the image area. The light intensity of the backlight area corresponding to the image area is determined according to the target gray value of the image area. In this way, the light intensity of each backlight area on the backlight panel can be determined according to the target gray value of each image area.
  • the light intensity of the backlight area corresponding to the image area is determined.
  • the target gray value of the image area is converted into a brightness adjustment coefficient a
  • the brightness of the backlight area is converted into a brightness adjustment coefficient a.
  • the driving circuit controls the brightness of each light bead in the backlight area according to the adjustment coefficient a, and determines the light intensity of the backlight area according to the brightness of each light bead.
  • T(s, t) is the target gray value of the image area.
  • the adjustment circuit 103 determines the brightness corresponding to each pixel on the display according to the light intensity of each backlight area determined in the processing unit 102, and adjusts the transmittance of the pixel according to the brightness corresponding to each pixel, so that the display
  • the product of the brightness and transmittance corresponding to each pixel on the pixel is equal to the product of the initial brightness and the initial transmittance of the pixel.
  • the product of brightness and transmittance corresponding to each pixel on the display is always equal to the product of the initial brightness and initial transmittance of the pixel, which is beneficial for adjusting each backlight area on the backlight panel. After the light intensity is increased, it will not affect the video image effect presented on the display.
  • the processing unit 102 can calculate the gray value of each pixel in each frame of the image and video according to the received image video signal.
  • the target gray value of the image area can be determined according to the gray value of each pixel in the image area, and the target gray value of each image area can be determined according to the target gray value of each image area.
  • the light intensity of each backlight area on the backlight panel corresponding to the image area. In this way, the light intensity of each backlight area on the backlight panel can be adjusted separately according to each frame of image in the image video to be displayed, and each backlight area on the backlight panel can be dynamically adjusted according to the change of consecutive frame images in the image video. Therefore, the utilization rate of the light intensity of the backlight plate is improved, and the problems existing in the related art are solved.
  • processing unit 102 is specifically configured to perform the following steps:
  • each pixel has three channels: red, green and blue.
  • the gray scale of each channel represents the proportion of red, green and blue in each pixel. Therefore, the above-mentioned channel values in the present disclosure represent the grayscale values of the corresponding channels.
  • the maximum value of the red, green, and blue channel values of the pixel can be used as the grayscale value of the pixel.
  • the average value or weighted sum value of the red, green and blue channel values can also be used as the gray value of the pixel point. Among them, it is not difficult to understand that the gray value of each pixel corresponds to the brightness of the pixel.
  • the gray value of each pixel can be calculated by the following formula:
  • I(i,j) max(R(i,j), G(i,j), B(i,j)), where (i,j) is the coordinates of the pixel, I(i,j) is the gray value of the pixel.
  • the maximum gray value among the gray values of the pixels in the image area may be used as the first target gray value of the image area; or, using The average value of the grayscale values of each pixel in the image area is expanded by N times as the first target grayscale value of the image area, where N is a number greater than zero.
  • the maximum gray value among the gray values corresponding to each pixel in the image area is used as the first target gray value of the image area.
  • the first target gray value of each image area is calculated by the following calculation formula:
  • (s, t) represents the coordinates of the image area
  • I(i, j) represents the gray value of the pixel points whose coordinates are (i, j) in the image area.
  • N can be a value greater than 0, such as 1.5, 2, 2.1, etc., which is not specifically limited in the present disclosure.
  • S202 may specifically calculate the first target gray value of each image area by using the following calculation formula:
  • Value n ⁇ Max+(1-n) ⁇ Avg, where Value represents the first target gray value of the image area, Max represents the largest value among the gray values of all pixels in the image area, and Avg represents the image area The average value of the grayscale values of all the pixels within, n is a constant from 0 to 1.
  • the adjacent image areas of the image area are the image areas of 01, 10, and 11, so part of the adjacent image areas of the image area are 01, 10 , at least one of 11.
  • the adjacent image areas of the image area are numbered 00, 01, 02, 10, 12, 20, 21, 22, so the image Part of the adjacent image area of the area is at least one of 00, 01, 02, 10, 12, 20, 21, 22.
  • the adjacent image areas of the image area are numbered 00, 10, 11, 12, and 02, so some adjacent images of this image area are The area is at least one of 00, 10, 11, 12, 02.
  • the first target gray value of the image area 00 and the first target gray values of the partial adjacent image areas 01, 10, and 11 of the image area 00 are smoothed, respectively.
  • the preset percentage range is set according to actual needs, for example, 0 to 5%, or 5 to 10%, or 0 to 15%.
  • the second target grayscale value of the image area and the part of the adjacent image area of the image area corresponds to the first target grayscale value of the image area and the part of the adjacent image area of the image area
  • the first target gray value of each image area is used as the target gray value of the image area until smoothing is performed on all the image areas.
  • the image area 00 after determining the second target gray value of the image area 00 and some adjacent image areas 01, 10, 11, the image area 00, 01, 10, 11
  • the second target gray value corresponds to the first target gray value as the image areas 00, 01, 10, and 11.
  • the second target gray value of the image area 01, 02, 11, 12 corresponds to As the first target gray value of the image areas 01, 02, 11, 12; then, for the image area 02, after determining the second target gray value of the image area 02 and some adjacent image areas 03, 12, 13 , the second target gray value of the image areas 02, 03, 12, 13 corresponds to the first target gray value of the image areas 02, 03, 12, 13, and so on until it is determined to perform smoothing processing on all image areas in Figure 3 Then, the first target gray value of each image area is used as the target gray value of the corresponding image area.
  • the light intensity of the corresponding backlight area on the backlight panel is respectively determined according to the target gray value of each image area determined in the above steps S201 to S204, which can avoid excessive difference in the light intensity of adjacent backlight areas.
  • the processing unit 102 may perform smoothing processing on the first target grayscale values of all image regions according to the first preset direction and/or the second preset direction.
  • the first preset directions may be directions from 00, 01, 02, 03, 10, 11 to 33, and the second preset directions are the reverse order of the first preset directions.
  • the processing unit 102 may sequentially perform smoothing processing on the first target gray value of each image area according to the first preset direction.
  • the processing unit 102 may sequentially perform smoothing processing on the first target gray value of each image area according to the second preset direction.
  • the processing unit 102 may first perform smoothing processing on the first target gray value of each image area in sequence according to the first preset direction, and then perform smoothing processing on each image region again according to the second preset direction. The first target gray value of the image area is smoothed.
  • the processing unit 102 may perform smoothing processing on the first target grayscale value of each image region in parallel according to the first preset direction and the second preset direction.
  • the processing unit 102 performs smoothing processing on the first target gray value of each of the image regions and the partial adjacent image regions of the image region according to the first preset direction, respectively.
  • Obtain the second target gray value of the image area and the part of the adjacent image area of the image area including:
  • the maximum value of the four first target grayscale values corresponding to the image area is multiplied by a coefficient K to obtain a smooth grayscale value, where K is greater than 0 and less than 1, and the coordinates are (s+1, t), (s , t+1), (s+1, t+1) image areas are the part of the adjacent image areas of the image area (s, t); for coordinates (s, t), (s+1, t ), (s, t+1), (s+1, t+1) for each of the image areas, compare the first target gray value of the image area with the smooth gray value The larger value is used as the second target gray value of the image area.
  • K is a decimal greater than 0 and less than 1, which is used to represent the difference in grayscale values of adjacent image regions, and the closer the value of K is to 1, the closer the grayscale values of adjacent image regions are.
  • the coordinates are (s+1, t), (s , t+1) and (s+1, t+1) image areas are part of the adjacent image areas of the image area (s, t).
  • the four first target grayscale values corresponding to the image regions with coordinates (s, t), (s+1, t), (s, t+1), and (s+1, t+1) are respectively T(s, t), T(s+1, t), T(s, t+1), T(s+1, t+1).
  • T(s, t+1) and Tm*K are used as the second target gray value of the image area.
  • the larger of T(s+1, t+1) and Tm*K is taken as the second target gray value of the image area.
  • the first preset directions are directions of 00, 01, 02, 03, 10, 11 to 33.
  • the position of each image region is represented by (s, t), where s represents the row of the image region and t represents the column of the image region.
  • the image areas with coordinates (1, 0), (0, 1), and (1, 1) are adjacent to the image area (0, 0). image area.
  • the first target gray value of the image area and the smooth gray value The larger value of is the second target gray value of the image area.
  • the processing unit 102 performs smoothing processing on the first target gray value of each of the image areas and the partial adjacent image areas of the image area according to the second preset direction, respectively.
  • Obtain the second target gray value of the image area and the part of the adjacent image area of the image area including:
  • the second preset directions are directions from 33 , 32 , 31 , 30 , 23 , 22 to 00 .
  • the position of each image region is represented by (s, t), where s represents the row of the image region and t represents the column of the image region.
  • the image areas with coordinates (2, 3), (3, 2), and (2, 2) are adjacent to the image area (3, 3). image area.
  • the first target gray value of the image area and the smooth gray value The larger of the values is used as the second target gray value of the image area.
  • an embodiment of the present disclosure further provides a method for determining the light intensity of a backlight area.
  • the method is applied to the processing unit 102 in any display control device in the above-mentioned embodiments. Referring to FIG. 4 , the method may be Include the following steps:
  • S402. Determine the light intensity of each backlight area on the backlight panel corresponding to each image area according to the target grayscale value of each image area.
  • the gray value of each pixel in each frame of the image video is calculated.
  • the target gray value of the image area can be determined according to the gray value of each pixel in the image area, and the target gray value of each image area can be determined according to the target gray value of each image area.
  • the light intensity of each backlight area on the backlight panel corresponding to the image area. In this way, the light intensity of each backlight area on the backlight panel can be adjusted separately according to each frame of image in the image video to be displayed, and each backlight area on the backlight panel can be dynamically adjusted according to the change of consecutive frame images in the image video. Therefore, the utilization rate of the light intensity of the backlight plate is improved, and the problems existing in the related art are solved.
  • determining the target gray value of the image area according to the gray value of each pixel in the image area including:
  • For each of the image areas determine the first target gray value of the image area according to the gray value of each pixel in the image area;
  • the light intensity of each of the backlight areas on the backlight panel corresponding to each of the image areas is determined according to the target grayscale value of each of the image areas.
  • the first target gray value of each of the image areas before using the first target gray value of each of the image areas as the target gray value of the corresponding image area, including:
  • the first target gray value is smoothed to obtain the second target gray value of the image area and the part of the adjacent image area of the image area, so that the image area and the part of the image area are adjacent to each other.
  • the difference percentages between the second target grayscale values of the image area are all within a preset percentage range;
  • the second target gray value of the image area and the part of the adjacent image area of the image area corresponds to the first target gray value of the image area and the part of the adjacent image area of the image area, until smoothing is performed for all of the image regions.
  • smoothing is performed on the first target grayscale values of all the image regions according to a first preset direction and/or a second preset direction.
  • smoothing is performed on the first target gray value of each of the image areas and the part of the adjacent image areas of the image area according to the first preset direction, to obtain the image area and
  • the second target gray value of the part of the adjacent image area of the image area includes:
  • the first target gray value and the smooth gray value is used as the second target gray value of the image area.
  • smoothing is performed on the first target gray value of each of the image areas and the part of the adjacent image areas of the image area according to the second preset direction, to obtain the image area and
  • the second target gray value of the part of the adjacent image area of the image area includes:
  • the first target gray value and the smooth gray value is used as the second target gray value of the image area.
  • Embodiments of the present disclosure also provide a computer program product, the computer program product comprising a computer program executable by a programmable device, the computer program having the method for performing the above-mentioned determining backlight region light when executed by the programmable device The code part of the strong method.

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Abstract

一种显示控制装置(100)及其确定背光区光强的方法。显示控制装置(100)包括:显示器主控电路(101),根据接收到的图像视频信号确定显示器上每一像素点对应的初始透过率以及初始亮度;处理单元(102),根据接收到的图像视频信号,计算图像中每一像素点的灰度值,并针对每一图像区域,根据图像区域内各像素点的灰度值确定图像区域的目标灰度值,根据每一图像区域的目标灰度值分别确定对应的背光板上的每一背光区的光强;调整电路(103),根据背光板上的每一背光区的光强,确定显示器上每一像素点对应的亮度,并根据每一像素点的亮度调整像素点的透过率,使得显示器上的每一像素点对应的亮度与透过率的乘积与像素点的初始亮度和初始透过率的乘积相等。

Description

显示控制装置及其确定背光区光强的方法 技术领域
本公开涉及背光显示器技术领域,具体地,涉及一种显示控制装置及其确定背光区光强的方法。
背景技术
背光显示器通常包括背光板和液晶显示面板(LCD)。液晶显示面板由具有红、绿、蓝滤色器图案的滤色器基板和液晶层构成。背光板由发光二极管(LED)或荧光光源组成。液晶显示面板自身不具备发光性能。液晶显示面板通过背光板照射并选择性的过滤部分颜色,从而显示不同颜色的图像。
目前常用的背光板为边条式背光板或直下式背光板。相关技术中,通过点亮整个背光板上的LED灯以获取整个背光板的光强分布信息,基于背光板的光强分布信息对视频图像信号进行处理以在液晶显示面板上显示视频图像。由于背光板的光强分布信息是在点亮整个背光板上的LED灯的情况下获取的,因此背光板的背光亮度不能随显示内容的变化而动态调节,使得图像显示内容偏暗时,背光板的光强利用率不高,造成能量浪费。加之液晶显示面板的透过率无法调节为0%,导致液晶显示器显示视频图像时对比度较差。
发明内容
本公开的目的是提供一种显示控制装置及其确定背光区光强的方法,以根据待显示的图像视频分别调节背光板上每一背光区的光强,提高背光板的光强利用率。
为了实现上述目的,根据本公开实施例的第一部分,提供一种显示控制 装置,包括一个或多个集成电路;
其中,所述一个或多个集成电路包括:
显示器主控电路,用于接收图像视频信号,并根据所述图像视频信号确定所述显示器上每一像素点对应的初始透过率以及初始亮度;
处理单元,用于根据接收到的所述图像视频信号,计算图像中每一像素点的灰度值,并针对每一图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值,根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的背光板上每一背光区的光强;
调整电路,用于根据所述背光板上的每一所述背光区的光强,确定所述显示器上每一像素点对应的亮度,并根据每一像素点的亮度调整该像素点的透过率,使得所述显示器上的每一像素点对应的亮度与透过率的乘积与该像素点的所述初始亮度和所述初始透过率的乘积相等。
可选地,所述处理单元具体用于:
根据接收到的所述图像视频信号,计算图像中每一像素点的红、绿、蓝通道值,并根据所述红、绿、蓝通道值确定该像素点的灰度值;
针对每一所述图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的第一目标灰度值;
将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值;
根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的所述背光板上的每一所述背光区的光强。
可选地,在将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值之前,所述处理单元还用于:
针对每一所述图像区域,根据该图像区域以及该图像区域的部分相邻图像区域的所述第一目标灰度值,对该图像区域以及该图像区域的所述部分相 邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,使得该图像区域和该图像区域的所述部分相邻图像区域的所述第二目标灰度值之间的差异百分比均处于预设百分比范围内;并
将该图像区域以及该图像区域的所述部分相邻图像区域的所述第二目标灰度值对应作为该图像区域以及该图像区域的所述部分相邻图像区域的第一目标灰度值,直到针对所有所述图像区域进行平滑处理。
可选地,所述处理单元按照第一预设方向和/或第二预设方向对所有所述图像区域的所述第一目标灰度值进行平滑处理。
可选地,所述处理单元按照所述第一预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,其中K大于0且小于1,坐标为(s+1,t)、(s,t+1)、(s+1,t+1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
针对坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
可选地,所述处理单元按照所述第二预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s-1,t)、(s,t-1)、 (s-1,t-1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,坐标为(s-1,t)、(s,t-1)、(s-1,t-1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
针对坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
根据本公开实施例的第二部分,提供一种确定背光区光强的方法,所述方法应用于上述第一部分中任一种显示控制装置中的处理单元,所述方法包括:
根据接收到的所述图像视频信号,计算图像中每一像素点的灰度值,并针对每一图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值;
根据每一所述图像区域的所述目标灰度值,分别确定每一所述图像区域对应的所述背光板上的每一背光区的光强。
可选地,所述针对每一图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值,包括:
针对每一所述图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的第一目标灰度值;
将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值;
根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的所述背光板上的每一所述背光区的光强。
可选地,在将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值之前,包括:
针对每一所述图像区域,根据该图像区域以及该图像区域的部分相邻图 像区域的所述第一目标灰度值,对该图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,使得该图像区域和该图像区域的所述部分相邻图像区域的所述第二目标灰度值之间的差异百分比均处于预设百分比范围内;并
将该图像区域以及该图像区域的所述部分相邻图像区域的所述第二目标灰度值对应作为该图像区域以及该图像区域的所述部分相邻图像区域的第一目标灰度值,直到针对所有所述图像区域进行平滑处理。
可选地,按照第一预设方向和/或第二预设方向对所有所述图像区域的所述第一目标灰度值进行平滑处理。
可选地,按照所述第一预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,其中K大于0且小于1,坐标为(s+1,t)、(s,t+1)、(s+1,t+1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
针对坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
可选地,按照所述第二预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系 数K,得到平滑灰度值,坐标为(s-1,t)、(s,t-1)、(s-1,t-1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
针对坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
根据本公开实施例的第三部分,提供一种计算机可读存储介质,其上存储有计算机程序,该程序被处理器执行时实现上述第二部分中任一种所述方法的步骤。
采用上述技术方案,至少能够达到如下技术效果:
处理单元根据接收到的图像视频信号,可以计算出该图像视频的每一帧图像中每一像素点的灰度值。针对每一帧图像中的每一图像区域,根据该图像区域内各像素点的灰度值可以确定该图像区域的目标灰度值,根据每一图像区域的目标灰度值可以分别确定每一图像区域对应的背光板上的每一背光区的光强。其中,每一图像区域分别与显示器上的每一像素区域相对应,该显示器上的每一像素区域分别与背光板上的每一背光区相对应。如此,可以实现根据待显示的图像视频中每一帧图像,分别调节背光板上每一背光区的光强,而根据图像视频中连续帧图像的变化可以动态的调节背光板上每一背光区的光强,从而提高背光板的光强利用率,解决了相关技术中存在的问题。
本公开的其他特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本公开的进一步理解,并且构成说明书的一部分,与下面的具体实施方式一起用于解释本公开,但并不构成对本公开的限制。在附图中:
图1是根据本公开一示例性实施例示出的一种显示控制装置的结构示意图。
图2是根据本公开一示例性实施例示出的一种处理单元的具体执行步骤的流程图。
图3是根据本公开一示例性实施例示出的一种将图像分成多个图像区域后的示意图。
图4是根据本公开一示例性实施例示出的一种确定背光区光强的方法的流程图。
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本公开,并不用于限制本公开。
这里将详细地对示例性实施例进行说明,其示例表示在附图中。下面的描述涉及附图时,除非另有表示,不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反,它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
背光显示器通常包括背光板和液晶显示面板。液晶显示面板由具有红、绿、蓝滤色器图案的滤色器基板和液晶层构成。背光板由发光二极管或荧光光源组成。液晶显示面板自身不具备发光性能。液晶显示面板通过背光板照射并选择性的过滤部分颜色,从而显示不同颜色的图像。
目前常用的背光板为边条式背光板或直下式背光板。相关技术中,通过点亮整个背光板上的LED灯以获取整个背光板的光强分布信息或者基于每一LED灯的性能参数拟合整个背光板的光强分布信息,基于背光板的光强分布信息对视频图像信号进行处理以在液晶显示面板上显示视频图像。由于 背光板的光强分布信息是在点亮整个背光板上的LED灯的情况下获取的,因此背光板的背光亮度不能随显示内容的变化而动态调节,使得显示内容偏暗时,背光板的光强利用率不高,造成能量浪费。加之液晶显示面板的透过率无法调节为0%,导致液晶显示器显示视频图像时对比度较差。
有鉴于此,本公开实施例提供一种显示控制装置及其确定背光区光强的方法,以实现根据待显示的图像视频分别调节背光板上每一背光区的光强,提高背光板的光强利用率的目的。
首先对本公开的应用场景进行说明,本公开的技术方案应用于使用直下式背光板的显示器。还需说明的是,本公开后续实施例中的显示器上每一像素点表征显示器的显示面板(LCD)上每一像素点。
图1是根据本公开一示例性实施例示出的一种显示控制装置的结构示意图,该显示控制装置100包括一个或多个集成电路;
其中,所述一个或多个集成电路包括:显示器主控电路101,用于接收图像视频信号,并根据所述图像视频信号确定所述显示器上每一像素点对应的初始透过率以及初始亮度;处理单元102,用于根据接收到的所述图像视频信号,计算图像中每一像素点的灰度值,并针对每一图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值,根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的背光板上每一背光区的光强;调整电路103,用于根据所述背光板上的每一所述背光区的光强,确定所述显示器上每一像素点对应的亮度,并根据每一像素点的亮度调整该像素点的透过率,使得所述显示器上的每一像素点对应的亮度与透过率的乘积与该像素点的所述初始亮度和所述初始透过率的乘积相等。
本领域普通技术人员应当知悉的是,相关技术中,在显示器显示视频图像之前,显示器主控电路101接收待显示的图像视频信号,并根据该图像视频信号确定在显示器上显示图像时该显示器上每一像素点的初始透过率,以 及每一像素点在背光板的初始光强下对应的初始亮度。
应当说明的是,将背光板划分为多个背光区后,可以对背光板上的每一背光区的光强分别进行控制。一种可实现的背光板划分实施方式,可以将背光板划分为相同大小的多个背光区,每一背光区包括多个发光二极管或荧光光源。不难理解的是,直下式背光板上的每一背光区分别对应显示器上的一个像素区域。而在显示器上显示视频图像的每一帧图像时,该显示器上的每一像素区域对应显示每一帧图像中的一个图像区域。也就是说,每一背光区对应待显示图像中的一个图像区域。
处理单元102根据接收到的图像视频信号,针对该图像视频信号中的每一帧图像,计算该图像中每一像素点的灰度值。针对该图像的每一图像区域,根据该图像区域内各像素点的灰度值确定该图像区域的目标灰度值。根据该图像区域的目标灰度值确定该图像区域对应的背光区的光强。如此,根据每一图像区域的目标灰度值可以分别确定背光板上每一背光区的光强。
根据某一图像区域的目标灰度值确定该图像区域对应的背光区的光强,一种可实现的实施方式,将该图像区域的目标灰度值转换为亮度调节系数a,该背光区的驱动电路根据该调节系数a控制该背光区中各光珠的亮度,根据各光珠的亮度确定该背光区的光强。其中,根据调节系数a确定背光区的光强的表达式可以为L(s,t)=a·T(s,t) g,其中,g是为gama系数,L(s,t)为图像区域对应的背光区的光强,T(s,t)为该图像区域的目标灰度值。
调整电路103根据处理单元102中确定的每一背光区的光强,确定显示器上每一像素点对应的亮度,并根据每一像素点对应的亮度调整该像素点的透过率,以使显示器上的每一像素点对应的亮度与透过率的乘积与该像素点的初始亮度和初始透过率的乘积相等。
需说明的是,显示器上的每一像素点对应的亮度与透过率的乘积始终与该像素点的初始亮度和初始透过率的乘积相等,这有利于在调整背光板上每 一背光区的光强后,不影响显示器上所呈现的视频图像效果。
采用这种方式,处理单元102根据接收到的图像视频信号,可以计算出该图像视频的每一帧图像中每一像素点的灰度值。针对每一帧图像中的每一图像区域,根据该图像区域内各像素点的灰度值可以确定该图像区域的目标灰度值,根据每一图像区域的目标灰度值可以分别确定每一图像区域对应的背光板上的每一背光区的光强。如此,可以实现根据待显示的图像视频中每一帧图像,分别调节背光板上每一背光区的光强,而根据图像视频中连续帧图像的变化可以动态的调节背光板上每一背光区的光强,从而提高背光板的光强利用率,解决了相关技术中存在的问题。
参见图2,一种可实现的实施方式,所述处理单元102具体用于执行以下步骤:
S201、根据接收到的所述图像视频信号,计算图像中每一像素点的红、绿、蓝通道值,并根据所述红、绿、蓝通道值确定该像素点的灰度值。
不难理解的是,每一像素点有红、绿、蓝三个通道。每一通道的灰阶表征红、绿、蓝在每一像素点中的比重。因此,本公开上述通道值表征对应通道的灰度值。通过分别计算图像中每一像素点的红、绿、蓝通道值,并可以将该像素点的红、绿、蓝通道值中的最大值作为该像素点的灰度值。也可以将红、绿、蓝通道值的平均值或者加权和值作为该像素点的灰度值。其中,不难理解的是,每一像素点的灰度值与该像素点的亮度相对应。
一种可实现的实施方式,可以通过如下计算公式计算每一像素点的灰度值:
I(i,j)=max(R(i,j),G(i,j),B(i,j)),其中,(i,j)为像素点的坐标,I(i,j)为该像素点的灰度值。
S202、针对每一所述图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的第一目标灰度值;
示例地,S202具体可以是针对每一所述图像区域,将该图像区域内各像素点的所述灰度值中的最大灰度值作为该图像区域的第一目标灰度值;或者,将该图像区域内各像素点的所述灰度值的均值扩大N倍后作为该图像区域的所述第一目标灰度值,其中N为大于零的数。
一种可实现的实施方式,针对每一图像区域,将该图像区域内各像素点对应的灰度值中的最大灰度值作为该图像区域的第一目标灰度值。示例地,通过如下计算公式计算每一图像区域的第一目标灰度值:
Figure PCTCN2020100707-appb-000001
其中,(s,t)表征图像区域的坐标,I(i,j)表征该图像区域中坐标为(i,j)的像素点的灰度值。
另一种可实现的实施方式,针对每一图像区域,计算该图像区域内各像素点对应的灰度值的平均值,并将该平均值扩大N倍后作为该图像区域的第一目标灰度值。其中,N可以为1.5、2、2.1等大于0的值,对此本公开不做具体限制。
再示例地,S202具体可以是采用如下计算公式计算每一图像区域的第一目标灰度值:
Value=n×Max+(1-n)×Avg,其中,Value表征图像区域的第一目标灰度值,Max表征该图像区域内所有像素点的灰度值中最大的值,Avg表征该图像区域内所有像素点的灰度值的平均值,n为0~1的常数。
S203、针对每一所述图像区域,根据该图像区域以及该图像区域的部分相邻图像区域的所述第一目标灰度值,对该图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,使得该图像区域和该图像区域的所述部分相邻图像区域的所述第二目标灰度值之间的差异百分比均处于预设百分比范围内。
示例地,参见图3,针对图3中编号为00的图像区域,该图像区域的相邻图像区域为01、10、11的图像区域,因此该图像区域的部分相邻图像区域为01、10、11中的至少一者。
再示例地,继续参见图3,针对图3中编号为11的图像区域,该图像区域的相邻图像区域的编号为00、01、02、10、12、20、21、22,因此该图像区域的部分相邻图像区域为00、01、02、10、12、20、21、22中的至少一者。
再示例地,继续参见图3,针对图3中编号为01的图像区域,该图像区域的相邻图像区域的编号为00、10、11、12、02,因此该图像区域的部分相邻图像区域为00、10、11、12、02中的至少一者。
示例地,假设针对图像区域00,对该图像区域00的第一目标灰度值,以及该图像区域00的部分相邻图像区域01、10、11的第一目标灰度值进行平滑处理,分别得到该图像区域00以及图像区域01、10、11的第二目标灰度值,其中,图像区域00、01、10、11的第二目标灰度值中任意两个值之间的差异百分比均处于预设百分比范围内。其中预设百分比范围根据实际需求进行设定,例如设置为0至5%,或者设置为5%至10%、再或者设置为0至15%。
S204、将该图像区域以及该图像区域的所述部分相邻图像区域的所述第二目标灰度值对应作为该图像区域以及该图像区域的所述部分相邻图像区域的第一目标灰度值,直到针对所有所述图像区域进行平滑处理后,将每一所述图像区域的所述第一目标灰度值作为该图像区域的所述目标灰度值。
示例地,继续参见图3,首先针对图像区域00,确定该图像区域00以及部分相邻图像区域01、10、11的第二目标灰度值之后,将图像区域00、01、10、11的第二目标灰度值对应作为图像区域00、01、10、11的第一目标灰度值。接着,针对图像区域01,确定该图像区域01以及部分相邻图像 区域02、11、12的第二目标灰度值之后,将图像区域01、02、11、12的第二目标灰度值对应作为图像区域01、02、11、12的第一目标灰度值;再接着,针对图像区域02,确定该图像区域02以及部分相邻图像区域03、12、13的第二目标灰度值之后,将图像区域02、03、12、13的第二目标灰度值对应作为图像区域02、03、12、13的第一目标灰度值,如此直到确定针对图3中所有图像区域进行平滑处理后,将每一图像区域的第一目标灰度值作为对应图像区域的目标灰度值。
S205、根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的所述背光板上的每一所述背光区的光强。
根据上述步骤S201至S204确定的每一图像区域的目标灰度值分别确定背光板上对应背光区的光强,可以避免相邻背光区的光强差异过大。
可选地,所述处理单元102可以按照第一预设方向和/或第二预设方向对所有图像区域的第一目标灰度值进行平滑处理。
继续参见图3,第一预设方向可以为从00、01、02、03、10、11至33的方向,第二预设方向为第一预设方向的倒序。一种可实现的实施方式,所述处理单元102可以按照第一预设方向依次针对每一图像区域的第一目标灰度值进行平滑处理。另一种可实现的实施方式,所述处理单元102可以按照第二预设方向依次针对每一图像区域的第一目标灰度值进行平滑处理。再一种可实现的实施方式,所述处理单元102可以先按照第一预设方向依次针对每一图像区域的第一目标灰度值进行平滑处理,然后按照第二预设方向再次针对每一图像区域的第一目标灰度值进行平滑处理。又一种可实现的实施方式,所述处理单元102可以并行按照第一预设方向、二预设方向依次针对每一图像区域的第一目标灰度值进行平滑处理。
可选地,所述处理单元102按照所述第一预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑 处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,其中K大于0且小于1,坐标为(s+1,t)、(s,t+1)、(s+1,t+1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;针对坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
需说明的是,K为大于0且小于1的小数,用于表征相邻图像区域的灰度值差异,K的值越接近1表征相邻图像区域的灰度值越接近。
具体地,按照上述第一预设方向对每一图像区域进行平滑处理的过程中,针对坐标为(s,t)的图像区域进行平滑处理时,坐标为(s+1,t)、(s,t+1)、(s+1,t+1)的图像区域为图像区域(s,t)的部分相邻图像区域。假设坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的图像区域分别对应的4个第一目标灰度值分别为T(s,t)、T(s+1,t)、T(s,t+1)、T(s+1,t+1)。将T(s,t)、T(s+1,t)、T(s,t+1)、T(s+1,t+1)中的最大值Tm乘以系数K,得到平滑灰度值Tm*K。接着,针对坐标为(s,t)的图像区域,将T(s,t)和Tm*K中的较大者作为该图像区域的第二目标灰度值。同样地,针对坐标为(s+1,t)的图像区域,将T(s+1,t)和Tm*K中的较大者作为该图像区域的第二目标灰度值。针对坐标为(s,t+1)的图像区域,将T(s,t+1)和Tm*K中的较大者作为该图像区域的第二目标灰度值。针对坐标为(s+1,t+1)的图像区域,将T(s+1,t+1)和Tm*K中的较大者作为该图像区域的第二目标灰度值。
以图3为例进行示例性说明,假设第一预设方向为00、01、02、03、10、11至33的方向。用(s,t)表征每一图像区域的位置,其中,s表征图像区 域的行,t表征图像区域的列。针对坐标为(0,0)的图像区域进行平滑处理时,坐标为(1,0)、(0,1)、(1,1)的图像区域为图像区域(0,0)的部分相邻图像区域。将坐标为(0,0)、(1,0)、(0,1)、(1,1)的图像区域对应的4个第一目标灰度值中的最大值乘以系数K,得到平滑灰度值。接着针对坐标为(0,0)、(1,0)、(0,1)、(1,1)的每一图像区域,将该图像区域的第一目标灰度值与该平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
可选地,所述处理单元102按照所述第二预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,坐标为(s-1,t)、(s,t-1)、(s-1,t-1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;针对坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
以图3为例进行示例性说明,第二预设方向为33、32、31、30、23、22至00的方向。用(s,t)表征每一图像区域的位置,其中,s表征图像区域的行,t表征图像区域的列。针对坐标为(3,3)的图像区域进行平滑处理时,坐标为(2,3)、(3,2)、(2,2)的图像区域为图像区域(3,3)的部分相邻图像区域。将坐标为(3,3)、(2,3)、(3,2)、(2,2)的图像区域对应的4个第一目标灰度值中的最大值乘以系数K,得到平滑灰度值。接着针对坐标为((3,3)、(2,3)、(3,2)、(2,2)的每一图像区域,将该图像区域的第一目标灰度值与该平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
基于同一发明构思,本公开实施例还提供一种确定背光区光强的方法,所述方法应用于上述实施例中任一种显示控制装置中的处理单元102,参见图4,所述方法可以包括以下步骤:
S401、根据接收到的所述图像视频信号,计算图像中每一像素点的灰度值,并针对每一图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值;
S402、根据每一所述图像区域的所述目标灰度值,分别确定每一所述图像区域对应的所述背光板上的每一背光区的光强。
采用这种方法,根据接收到的图像视频信号,计算出该图像视频的每一帧图像中每一像素点的灰度值。针对每一帧图像中的每一图像区域,根据该图像区域内各像素点的灰度值可以确定该图像区域的目标灰度值,根据每一图像区域的目标灰度值可以分别确定每一图像区域对应的背光板上的每一背光区的光强。如此,可以实现根据待显示的图像视频中每一帧图像,分别调节背光板上每一背光区的光强,而根据图像视频中连续帧图像的变化可以动态的调节背光板上每一背光区的光强,从而提高背光板的光强利用率,解决了相关技术中存在的问题。
可选地,所述针对每一图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值,包括:
针对每一所述图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的第一目标灰度值;
将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值;
根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的所述背光板上的每一所述背光区的光强。
可选地,在将每一所述图像区域的所述第一目标灰度值作为对应图像区 域的所述目标灰度值之前,包括:
针对每一所述图像区域,根据该图像区域以及该图像区域的部分相邻图像区域的所述第一目标灰度值,对该图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,使得该图像区域和该图像区域的所述部分相邻图像区域的所述第二目标灰度值之间的差异百分比均处于预设百分比范围内;并
将该图像区域以及该图像区域的所述部分相邻图像区域的所述第二目标灰度值对应作为该图像区域以及该图像区域的所述部分相邻图像区域的第一目标灰度值,直到针对所有所述图像区域进行平滑处理。
可选地,按照第一预设方向和/或第二预设方向对所有所述图像区域的所述第一目标灰度值进行平滑处理。
可选地,按照所述第一预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,其中K大于0且小于1,坐标为(s+1,t)、(s,t+1)、(s+1,t+1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
针对坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
可选地,按照所述第二预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,坐标为(s-1,t)、(s,t-1)、(s-1,t-1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
针对坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
关于上述实施例中的步骤,其中各个步骤的具体实施方式已经在有关该显示控制装置的实施例中进行了详细描述,此处将不做详细阐述说明。
本公开实施例还提供一种计算机程序产品,该计算机程序产品包含能够由可编程的装置执行的计算机程序,该计算机程序具有当由该可编程的装置执行时用于执行上述的确定背光区光强的方法的代码部分。
以上结合附图详细描述了本公开的优选实施方式,但是,本公开并不限于上述实施方式中的具体细节,在本公开的技术构思范围内,可以对本公开的技术方案进行多种简单变型,这些简单变型均属于本公开的保护范围。
另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合。为了避免不必要的重复,本公开对各种可能的组合方式不再另行说明。
此外,本公开的各种不同的实施方式之间也可以进行任意组合,只要其不违背本公开的思想,其同样应当视为本公开所公开的内容。

Claims (13)

  1. 一种显示控制装置,其特征在于,包括一个或多个集成电路;
    其中,所述一个或多个集成电路包括:
    显示器主控电路,用于接收图像视频信号,并根据所述图像视频信号确定所述显示器上每一像素点对应的初始透过率以及初始亮度;
    处理单元,用于根据接收到的所述图像视频信号,计算图像中每一像素点的灰度值,并针对每一图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值,根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的背光板上每一背光区的光强;
    调整电路,用于根据所述背光板上的每一所述背光区的光强,确定所述显示器上每一像素点对应的亮度,并根据每一像素点的亮度调整该像素点的透过率,使得所述显示器上的每一像素点对应的亮度与透过率的乘积与该像素点的所述初始亮度和所述初始透过率的乘积相等。
  2. 根据权利要求1所述的显示控制装置,其特征在于,所述处理单元具体用于:
    根据接收到的所述图像视频信号,计算图像中每一像素点的红、绿、蓝通道值,并根据所述红、绿、蓝通道值确定该像素点的灰度值;
    针对每一所述图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的第一目标灰度值;
    将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值;
    根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的所述背光板上的每一所述背光区的光强。
  3. 根据权利要求2所述的显示控制装置,其特征在于,在将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值之前,所述处理单元还用于:
    针对每一所述图像区域,根据该图像区域以及该图像区域的部分相邻图像区域的所述第一目标灰度值,对该图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,使得该图像区域和该图像区域的所述部分相邻图像区域的所述第二目标灰度值之间的差异百分比均处于预设百分比范围内;并
    将该图像区域以及该图像区域的所述部分相邻图像区域的所述第二目标灰度值对应作为该图像区域以及该图像区域的所述部分相邻图像区域的第一目标灰度值,直到针对所有所述图像区域进行平滑处理。
  4. 根据权利要求3所述的显示控制装置,其特征在于,所述处理单元按照第一预设方向和/或第二预设方向对所有所述图像区域的所述第一目标灰度值进行平滑处理。
  5. 根据权利要求4所述的显示控制装置,其特征在于,所述处理单元按照所述第一预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
    针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,其中K大于0且小于1,坐标为(s+1,t)、(s,t+1)、(s+1,t+1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
    针对坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
  6. 根据权利要求4所述的显示控制装置,其特征在于,所述处理单元按照所述第二预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
    针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,坐标为(s-1,t)、(s,t-1)、(s-1,t-1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
    针对坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
  7. 一种确定背光区光强的方法,其特征在于,所述方法应用于权利要求1所述的显示控制装置中的处理单元,所述方法包括:
    根据接收到的所述图像视频信号,计算图像中每一像素点的灰度值,并针对每一图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值;
    根据每一所述图像区域的所述目标灰度值,分别确定每一所述图像区域对应的所述背光板上的每一背光区的光强。
  8. 根据权利要求7所述的方法,其特征在于,所述针对每一图像区域, 根据该图像区域内各像素点的所述灰度值确定该图像区域的目标灰度值,包括:
    针对每一所述图像区域,根据该图像区域内各像素点的所述灰度值确定该图像区域的第一目标灰度值;
    将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值;
    根据每一所述图像区域的所述目标灰度值分别确定每一所述图像区域对应的所述背光板上的每一所述背光区的光强。
  9. 根据权利要求8所述的方法,其特征在于,在将每一所述图像区域的所述第一目标灰度值作为对应图像区域的所述目标灰度值之前,包括:
    针对每一所述图像区域,根据该图像区域以及该图像区域的部分相邻图像区域的所述第一目标灰度值,对该图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,使得该图像区域和该图像区域的所述部分相邻图像区域的所述第二目标灰度值之间的差异百分比均处于预设百分比范围内;并
    将该图像区域以及该图像区域的所述部分相邻图像区域的所述第二目标灰度值对应作为该图像区域以及该图像区域的所述部分相邻图像区域的第一目标灰度值,直到针对所有所述图像区域进行平滑处理。
  10. 根据权利要求9所述的方法,其特征在于,按照第一预设方向和/或第二预设方向对所有所述图像区域的所述第一目标灰度值进行平滑处理。
  11. 根据权利要求10所述的方法,其特征在于,按照所述第一预设方 向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
    针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,其中K大于0且小于1,坐标为(s+1,t)、(s,t+1)、(s+1,t+1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
    针对坐标为(s,t)、(s+1,t)、(s,t+1)、(s+1,t+1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
  12. 根据权利要求10所述的方法,其特征在于,按照所述第二预设方向对每一所述图像区域以及该图像区域的所述部分相邻图像区域的所述第一目标灰度值进行平滑处理,分别得到该图像区域以及该图像区域的所述部分相邻图像区域的第二目标灰度值,包括:
    针对坐标为(s,t)的所述图像区域,将坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的所述图像区域对应的4个所述第一目标灰度值中的最大值乘以系数K,得到平滑灰度值,坐标为(s-1,t)、(s,t-1)、(s-1,t-1)的图像区域为图像区域(s,t)的所述部分相邻图像区域;
    针对坐标为(s,t)、(s-1,t)、(s,t-1)、(s-1,t-1)的每一所述图像区域,将该图像区域的所述第一目标灰度值与所述平滑灰度值中的较大值作为该图像区域的第二目标灰度值。
  13. 一种计算机可读存储介质,其上存储有计算机程序,其特征在于,该程序被处理器执行时实现权利要求7-12中任一项所述方法的步骤。
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