CN109949751B - Display brightness adjusting method and device - Google Patents
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Abstract
The invention discloses a display brightness adjusting method and a device, wherein the method comprises the following steps: acquiring backlight brightness distribution information of each type of pixel points in a display image after the partition backlight is performed; the pixel points of the sub-pixels which emit light with the same color through the partition backlight are classified into one type; comparing the backlight brightness distribution information of each type of pixel points with the backlight brightness distribution information of the corresponding pixel points when all backlight subareas are lighted to the maximum brightness respectively to obtain the image gray scale brightness gain value of each type of pixel points; and according to the image gray scale brightness gain value of each type of pixel point, brightness of the corresponding pixel point in the display image is improved, so that the display image quality is effectively improved.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a display brightness adjusting method and device.
Background
The Local Dimming technology is used for carrying out partition adjustment on the brightness of backlight according to the content of a display picture, and the basic idea is as follows: the brightness of the LED backlight corresponding to the high-brightness part of the picture is higher or maximum, and the brightness of the LED backlight corresponding to the darker part is darker and even is closed. Compared with the conventional backlight with the maximum brightness on the whole surface, the reduction of the backlight brightness of the Local Dimming technology can compensate the brightness by increasing the gray scale of the LCD. Direct type 2D area light source combines Local Dimming algorithm, has still reduced black state luminance when reducing LCD module power consumption, has greatly improved the contrast of display frame, promotes consumer's sense organ and experiences.
For a backlight framework of a direct type blue light LED partition (block) which is matched with a yellow fluorescent powder film layer (KSF, Silicate or QD fluorescent powder) and synthesizes a white light source by exciting red light and green light through blue light, when a single LED block is lightened, the blue light is transmitted to the outside of the LED block and then is absorbed by the fluorescent powder to excite yellow light, so that the diffusion type of the blue light is narrower than that of yellow light (red light and green light), the halo of the LED block is yellowed, and the white light color at the center of the block is more blue than that of white light when the whole surface is lightened simultaneously. When a complex picture is displayed, the brightness distribution of the Local Dimming whole-face backlight has obvious yellow halo at the junction of a high-brightness block and a low-brightness block, and the center color of the high-brightness block is bluish, so that the display picture quality is poor.
Disclosure of Invention
The embodiment of the invention provides a display brightness adjusting method and device, and aims to solve the problem of poor display image quality caused by the conventional brightness adjustment.
The embodiment of the invention provides a display brightness adjusting method, which comprises the steps of
Acquiring backlight brightness distribution information of each type of pixel points in a display image after the partition backlight is performed; the pixel points of the sub-pixels which emit light with the same color through the partition backlight are classified into one type;
comparing the backlight brightness distribution information of each type of pixel points with the backlight brightness distribution information of the corresponding pixel points when all backlight subareas are lighted to the maximum brightness respectively to obtain the image gray scale brightness gain value of each type of pixel points;
and according to the image gray scale brightness gain value of each type of pixel point, carrying out brightness improvement on the corresponding pixel point in the display image.
Further, the acquiring of the backlight brightness distribution information of each type of pixel points in the display image after the partition backlight includes:
dividing the display image into pixel partitions corresponding to each backlight partition;
acquiring a backlight duty ratio of each backlight partition;
acquiring backlight brightness distribution information of each type of pixel points in a pixel partition corresponding to any backlight partition;
and according to the backlight duty ratios of all backlight partitions and the backlight brightness distribution information of each type of pixel points in the pixel partitions corresponding to the backlight partitions, overlapping the backlight brightness distribution information of the same type of pixel points in all the pixel partitions to obtain the backlight brightness distribution information of each type of pixel points in the display image after partitioning backlight.
Further, the obtaining the backlight duty ratio of each backlight partition specifically includes:
acquiring a pixel gray-scale value of each pixel partition;
and calculating the backlight duty ratio of the backlight subarea corresponding to the pixel subarea according to the pixel gray-scale value of each pixel subarea.
Further, the acquiring backlight brightness distribution information of each type of pixel point in a pixel partition corresponding to any backlight partition specifically includes:
and lightening any backlight partition to obtain the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to the backlight partition.
Furthermore, color light emitted by the sub-pixels of the display image through the partition backlight comprises yellow light and blue light, so that the pixel points of the red sub-pixels and the green sub-pixels are of the same type, and the pixel points of the blue sub-pixels are of the same type; or the color light emitted by the sub-pixels in the display image through the partition backlight comprises red light, green light and blue light, so that the pixel points of the red sub-pixels are of one type, the pixel points of the green sub-pixels are of one type, and the pixel points of the blue sub-pixels are of one type.
An embodiment of the present invention further provides a display brightness adjusting apparatus, including:
the information acquisition module is used for acquiring the backlight brightness distribution information of each type of pixel points in the display image after the partition backlight is performed; the pixel points of the sub-pixels which emit light with the same color through the partition backlight are classified into one type;
the comparison module is used for comparing the backlight brightness distribution information of each type of pixel points with the backlight brightness distribution information of the corresponding pixel points when all backlight subareas are lightened to the maximum brightness respectively to obtain the image gray scale brightness gain value of each type of pixel points; and the number of the first and second groups,
and the brightness adjusting module is used for improving the brightness of the corresponding pixel points in the display image according to the image gray scale brightness gain value of each type of pixel points.
Further, the information obtaining module specifically includes:
a dividing unit for dividing the display image into pixel partitions corresponding to each backlight partition;
a duty ratio obtaining unit for obtaining a backlight duty ratio of each backlight partition;
the distribution information acquisition unit is used for acquiring the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to any backlight partition; and the number of the first and second groups,
and the processing unit is used for superposing the backlight brightness distribution information of the same type of pixel points in all the pixel partitions according to the backlight duty ratios of all the backlight partitions and the backlight brightness distribution information of each type of pixel points in the pixel partitions corresponding to the backlight partitions to obtain the backlight brightness distribution information of each type of pixel points in the display image after the partition backlight.
Further, the duty ratio obtaining unit specifically includes:
the gray-scale value acquisition subunit is used for acquiring the gray-scale value of each pixel partition; and the number of the first and second groups,
and the duty ratio calculating subunit is used for calculating the backlight duty ratio of the backlight subarea corresponding to the pixel subarea according to the pixel gray-scale value of each pixel subarea.
Further, the distribution information obtaining unit is specifically configured to light any backlight partition, and obtain backlight brightness distribution information of each type of pixel point in a pixel partition corresponding to the backlight partition.
Furthermore, color light emitted by the sub-pixels of the display image through the partition backlight comprises yellow light and blue light, so that the pixel points of the red sub-pixels and the green sub-pixels are of the same type, and the pixel points of the blue sub-pixels are of the same type; or the color light emitted by the sub-pixels in the display image through the partition backlight comprises red light, green light and blue light, so that the pixel points of the red sub-pixels are of one type, the pixel points of the green sub-pixels are of one type, and the pixel points of the blue sub-pixels are of one type.
The invention has the beneficial effects that: the method comprises the steps of taking pixel points of sub-pixels emitting light with the same color through partition backlight in a display image as a class to obtain backlight brightness distribution information of each class of pixel points, comparing the backlight brightness distribution information of each class of pixel points with the backlight brightness distribution information of corresponding pixel points when all backlight partitions are lighted to the maximum brightness, obtaining an image gray scale brightness gain value of each class of pixel points, adjusting the brightness of the corresponding pixel points according to the image gray scale brightness gain value of each class of pixel points, and effectively improving the display image quality.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a display brightness adjusting method according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a display image in a conventional display brightness adjustment method;
fig. 3 is a schematic diagram of a display image in the display brightness adjusting method according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display brightness adjusting apparatus according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings for illustrating the invention and enabling those skilled in the art to fully describe the technical contents of the present invention so that the technical contents of the present invention can be more clearly and easily understood. The present invention may, however, be embodied in many different forms of embodiments and the scope of the present invention should not be construed as limited to the embodiments set forth herein.
The terms used in the description of the present invention are only used to describe specific embodiments, and are not intended to show the concept of the present invention. Unless the context clearly dictates otherwise, expressions used in the singular form encompass expressions in the plural form. In the present specification, it is to be understood that terms such as "comprising," "having," and "containing" are intended to specify the presence of stated features, integers, steps, acts, or combinations thereof, as taught in the present specification, and are not intended to preclude the presence or addition of one or more other features, integers, steps, acts, or combinations thereof. Like reference symbols in the various drawings indicate like elements.
Fig. 1 is a schematic flow chart of a display brightness adjusting method according to an embodiment of the present invention.
The display brightness adjusting method provided by the embodiment comprises the following steps:
101. acquiring backlight brightness distribution information of each type of pixel points in a display image after the partition backlight is performed; the sub-pixels emitting light of the same color through the partitioned backlight have pixel points of one type.
In this embodiment, after the display image is input, the pixel points of all the sub-pixels in the display image can be classified according to the color (i.e., light type) of the backlight light emitted through the partition, the pixel points of the sub-pixels with the same light type are classified into one type, and the light type corresponding to the sub-pixels generally includes yellow light, blue light, red light or green light. For example, color lights emitted by the sub-pixels of the display image through the partition backlight include yellow light and blue light, so that the pixel points of the red sub-pixels and the green sub-pixels are classified into one type, and the pixel points of the blue sub-pixels are classified into one type; or, the color light emitted by the sub-pixels in the display image through the partition backlight comprises red light, green light and blue light, so that the pixel points of the red sub-pixels are of one type, the pixel points of the green sub-pixels are of one type, and the pixel points of the blue sub-pixels are of one type, that is, the pixel points of the sub-pixels in the display image can be divided into the pixel points of the yellow sub-pixels and the blue sub-pixels, or the pixel points of the red sub-pixels, the pixel points of the green sub-pixels and the pixel points of the blue sub-pixels.
And further acquiring backlight brightness distribution information of each type of pixel points, wherein the backlight brightness distribution information comprises a corresponding relation between pixel point positions and backlight brightness.
Specifically, step 101 includes:
dividing the display image into pixel partitions corresponding to each backlight partition;
acquiring a backlight duty ratio of each backlight partition;
acquiring backlight brightness distribution information of each type of pixel points in a pixel partition corresponding to any backlight partition;
and according to the backlight duty ratios of all backlight partitions and the backlight brightness distribution information of each type of pixel points in the pixel partitions corresponding to the backlight partitions, overlapping the backlight brightness distribution information of the same type of pixel points in all the pixel partitions to obtain the backlight brightness distribution information of each type of pixel points in the display image after partitioning backlight.
In this embodiment, the backlight source is divided into a plurality of backlight partitions, and the display image is divided into a plurality of pixel partitions according to the plurality of backlight partitions, so that the plurality of backlight partitions correspond to the plurality of pixel partitions one to one. The light type of any backlight partition when being lighted is obtained through a measuring means, and the backlight brightness distribution information of each light type in the backlight partition is simulated or directly tested, so that the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to the backlight partition can be obtained. The backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to any backlight partition is the backlight brightness distribution information of the corresponding pixel points in the pixel partition corresponding to all the backlight partitions. And superposing the backlight brightness distribution information of the same type of pixel points in all the pixel partitions in a whole plane according to the backlight duty ratios (PWM) of all the backlight partitions and the backlight brightness distribution information of each type of pixel points in the pixel partitions corresponding to the backlight partitions, so that the backlight brightness distribution information of each type of pixel points in the display image after the partition backlight is obtained.
Specifically, the obtaining the backlight duty ratio of each backlight partition specifically includes:
acquiring a pixel gray-scale value of each pixel partition;
and calculating the backlight duty ratio of the backlight subarea corresponding to the pixel subarea according to the pixel gray-scale value of each pixel subarea.
It should be noted that, after the plurality of pixel partitions are divided, the RGB gray scale in each pixel partition is counted to obtain the pixel gray scale value of each pixel partition, and further obtain the backlight duty ratio PWM value of the backlight partition corresponding to each pixel partition.
Specifically, the acquiring backlight brightness distribution information of each type of pixel point in a pixel partition corresponding to any backlight partition specifically includes:
and lightening any backlight partition to obtain the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to the backlight partition.
It should be noted that the PWM value of any backlight partition is output to the LED driving module to drive the corresponding backlight partition to be lit, so that the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to the backlight partition can be obtained.
102. And comparing the backlight brightness distribution information of each type of pixel points with the backlight brightness distribution information of the corresponding pixel points when all backlight subareas are lighted to the maximum brightness respectively to obtain the image gray scale brightness gain value of each type of pixel points.
In this embodiment, the lighting of all backlight partitions to the maximum brightness may be implemented by inputting the maximum PWM values of all backlight partitions to the LED driving module. And comparing the backlight brightness distribution information of each type of pixel points in the display image with the backlight brightness distribution information of the type of pixel points when all backlight subareas are lightened to the maximum brightness to obtain the image gray scale brightness gain value of each type of pixel points, namely the image gray scale brightness gain value of each color channel.
103. And according to the image gray scale brightness gain value of each type of pixel point, carrying out brightness improvement on the corresponding pixel point in the display image.
In the embodiment, the brightness of the corresponding color channel can be adjusted and compensated according to the image gray scale brightness gain value of each type of pixel point, and the display image is displayed according to the adjusted brightness, so that the display image quality is effectively improved.
In a specific embodiment, the color lights emitted by the sub-pixels in the display image through the partition backlight include yellow light and blue light, and then the pixel point of the red sub-pixel R and the pixel point of the green sub-pixel G in the display image are classified into one type, and the pixel point of the blue sub-pixel B is classified into one type. The method comprises the steps of firstly lighting any backlight subarea to obtain brightness distribution information of yellow light and brightness distribution information of blue light corresponding to the backlight subareas, then calculating the brightness distribution information after the whole superposition of yellow light and the brightness distribution information after the whole superposition of blue light in all the backlight subareas by combining backlight duty ratios PWM of all the backlight subareas, further comparing the brightness distribution information of the superposed yellow light with the brightness distribution information origin _ Y of the yellow light when all the backlight subareas are lighted to the maximum brightness to obtain image gray scale brightness gain values gain _ Y of an R channel and a G channel, and comparing the brightness distribution information of the superposed blue light with the brightness distribution information origin _ B of the blue light when all the backlight subareas are lighted to the maximum brightness to obtain an image gray scale brightness gain value gain _ B of a B channel. The brightness of the R channel and the G channel is adjusted according to the image gray scale brightness gain value gain _ Y, and the brightness of the B channel is adjusted according to the image gray scale brightness gain value gain _ B, so that the adjusted display image can be displayed, and the display image quality is effectively improved.
In another specific embodiment, the color light emitted by the sub-pixels in the display image through the partition backlight includes red light, green light and blue light, and then the pixels of the red sub-pixel R in the display image are of the same type, the pixels of the green sub-pixel G are of the same type, and the pixels of the blue sub-pixel B are of the same type. The method comprises the steps of firstly, obtaining the brightness distribution information of red light, the brightness distribution information of green light and the brightness distribution information of blue light corresponding to a backlight partition by lighting any backlight partition, and then calculating the brightness distribution information after the whole red light is overlapped, the brightness distribution information after the whole green light is overlapped and the brightness distribution information after the whole blue light is overlapped in all the backlight partitions. And comparing the brightness distribution information of the superposed red light with the brightness distribution information origin _ R of the red light when all the backlight subareas are lighted to the maximum brightness to obtain an image gray scale brightness gain value gain _ R of the R channel, comparing the brightness distribution information of the superposed green light with the brightness distribution information origin _ G of the green light when all the backlight subareas are lighted to the maximum brightness to obtain an image gray scale brightness gain value gain _ G of the G channel, and comparing the brightness distribution information of the superposed blue light with the brightness distribution information origin _ B of the blue light when all the backlight subareas are lighted to the maximum brightness to obtain an image gray scale brightness gain value gain _ B of the B channel. The brightness of the R channel is adjusted according to the image gray scale brightness gain value gain _ R, the brightness of the G channel is adjusted according to the image gray scale brightness gain value gain _ G, and the brightness of the B channel is adjusted according to the image gray scale brightness gain value gain _ B, so that the adjusted display image can be displayed, and the display image quality is effectively improved.
It should be noted that, if the luminance gain value of the same image gray scale is used to adjust the luminance of the R, G, B channel, as shown in fig. 2, there are blue-biased partitions in the highlight backlight area 1 of the display image, and there is an obvious yellow halo at the edge of the highlight backlight area, especially when the gray scale image is displayed, which greatly affects the display effect. However, by adopting the display brightness adjusting method in this embodiment, the R, G channel is adjusted by using the image gray scale gain value gain _ Y, and the B channel is adjusted by using the image gray scale brightness gain value gain _ B, as shown in fig. 3, the high-brightness backlight area 1 in the display image no longer has a bluish partition, and the edge of the high-brightness backlight area 1 no longer has a yellow halo, so that the display effect is obviously improved.
As can be seen from the above, in the display brightness adjustment method provided in this embodiment, the pixel points of the sub-pixels emitting the same color light through the partition backlight in the display image are taken as a class, so as to obtain the backlight brightness distribution information of each class of pixel points, and the backlight brightness distribution information of each class of pixel points is compared with the backlight brightness distribution information of the corresponding pixel points when all the backlight partitions are lit to the maximum brightness, so as to obtain the image gray scale brightness gain value of each class of pixel points, so as to perform brightness adjustment on the corresponding pixel points according to the image gray scale brightness gain value of each class of pixel points, thereby effectively improving the display quality.
Referring to fig. 4, an embodiment of the present invention further provides a display brightness adjusting apparatus, which is capable of implementing all the processes of the display brightness adjusting method in the foregoing embodiment.
The display brightness adjusting device provided by the embodiment of the invention comprises:
the information obtaining module 41 is configured to obtain backlight brightness distribution information of each type of pixel point in the display image after the partition backlight is performed; the pixel points of the sub-pixels which emit light with the same color through the partition backlight are classified into one type;
the comparison module 42 is configured to compare the backlight luminance distribution information of each type of pixel point with the backlight luminance distribution information of the corresponding pixel point when all backlight partitions are lit to the maximum luminance, and obtain an image gray scale luminance gain value of each type of pixel point; and the number of the first and second groups,
and the brightness adjusting module 43 is configured to perform brightness enhancement on the corresponding pixel points in the display image according to the image gray scale brightness gain value of each type of pixel points.
Further, the information obtaining module specifically includes:
a dividing unit for dividing the display image into pixel partitions corresponding to each backlight partition;
a duty ratio obtaining unit for obtaining a backlight duty ratio of each backlight partition;
the distribution information acquisition unit is used for acquiring the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to any backlight partition; and the number of the first and second groups,
and the processing unit is used for superposing the backlight brightness distribution information of the same type of pixel points in all the pixel partitions according to the backlight duty ratios of all the backlight partitions and the backlight brightness distribution information of each type of pixel points in the pixel partitions corresponding to the backlight partitions to obtain the backlight brightness distribution information of each type of pixel points in the display image after the partition backlight.
Further, the duty ratio obtaining unit specifically includes:
the gray-scale value acquisition subunit is used for acquiring the gray-scale value of each pixel partition; and the number of the first and second groups,
and the duty ratio calculating subunit is used for calculating the backlight duty ratio of the backlight subarea corresponding to the pixel subarea according to the pixel gray-scale value of each pixel subarea.
Further, the distribution information obtaining unit is specifically configured to light any backlight partition, and obtain backlight brightness distribution information of each type of pixel point in a pixel partition corresponding to the backlight partition.
Furthermore, color light emitted by the sub-pixels of the display image through the partition backlight comprises yellow light and blue light, so that the pixel points of the red sub-pixels and the green sub-pixels are of the same type, and the pixel points of the blue sub-pixels are of the same type; or the color light emitted by the sub-pixels in the display image through the partition backlight comprises red light, green light and blue light, so that the pixel points of the red sub-pixels are of one type, the pixel points of the green sub-pixels are of one type, and the pixel points of the blue sub-pixels are of one type.
As can be seen from the above, the display brightness adjusting apparatus provided in this embodiment uses, as a class, the pixel points of the sub-pixels emitting the same color light through the partition backlight in the display image to obtain the backlight brightness distribution information of each class of pixel points, and compares the backlight brightness distribution information of each class of pixel points with the backlight brightness distribution information of the corresponding pixel points when all the backlight partitions are lit to the maximum brightness, so as to obtain the image gray scale brightness gain value of each class of pixel points, so as to adjust the brightness of the corresponding pixel points according to the image gray scale brightness gain value of each class of pixel points, thereby effectively improving the display quality.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (8)
1. A display brightness adjustment method is characterized by comprising the following steps:
lightening any backlight subarea, and acquiring backlight brightness distribution information of each type of pixel points in a display image after subarea backlight; the pixel points of the sub-pixels which emit light with the same color through the partition backlight are classified into one type; the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to any backlight partition is used as the backlight brightness distribution information of the corresponding pixel points in the pixel partitions corresponding to all backlight partitions;
comparing the backlight brightness distribution information of each type of pixel points with the backlight brightness distribution information of the corresponding pixel points when all backlight subareas are lighted to the maximum brightness respectively to obtain the image gray scale brightness gain value of each type of pixel points;
and according to the image gray scale brightness gain value of each type of pixel point, carrying out brightness improvement on the corresponding pixel point in the display image.
2. The method according to claim 1, wherein the obtaining backlight luminance distribution information of each type of pixel points in the display image after the partition backlight comprises:
dividing the display image into pixel partitions corresponding to each backlight partition;
acquiring a backlight duty ratio of each backlight partition;
acquiring backlight brightness distribution information of each type of pixel points in a pixel partition corresponding to any one backlight partition;
and superposing the backlight brightness distribution information of the same type of pixel points in all the pixel partitions according to the backlight duty ratios of all the backlight partitions and the backlight brightness distribution information of each type of pixel points in the pixel partitions corresponding to any one of the backlight partitions to obtain the backlight brightness distribution information of each type of pixel points in the display image after the partition backlight.
3. The method according to claim 2, wherein the obtaining the backlight duty ratio of each backlight partition specifically comprises:
acquiring a pixel gray-scale value of each pixel partition;
and calculating the backlight duty ratio of the backlight subarea corresponding to the pixel subarea according to the pixel gray-scale value of each pixel subarea.
4. The method according to claim 1, wherein the color lights emitted by the sub-pixels in the display image through the partitioned backlight include yellow light and blue light, so that the pixel points of the red sub-pixels and the pixel points of the green sub-pixels are of the same type, and the pixel points of the blue sub-pixels are of the same type; or the color light emitted by the sub-pixels in the display image through the partition backlight comprises red light, green light and blue light, so that the pixel points of the red sub-pixels are of one type, the pixel points of the green sub-pixels are of one type, and the pixel points of the blue sub-pixels are of one type.
5. A display luminance adjustment apparatus, comprising:
the information acquisition module is used for lightening any backlight subarea and acquiring backlight brightness distribution information of each type of pixel points in a display image after subarea backlight; the pixel points of the sub-pixels which emit light with the same color through the partition backlight are classified into one type; the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to any backlight partition is used as the backlight brightness distribution information of the corresponding pixel points in the pixel partitions corresponding to all backlight partitions;
the comparison module is used for comparing the backlight brightness distribution information of each type of pixel points with the backlight brightness distribution information of the corresponding pixel points when all backlight subareas are lightened to the maximum brightness respectively to obtain the image gray scale brightness gain value of each type of pixel points; and the number of the first and second groups,
and the brightness adjusting module is used for improving the brightness of the corresponding pixel points in the display image according to the image gray scale brightness gain value of each type of pixel points.
6. The display brightness adjustment apparatus according to claim 5, wherein the information acquisition module specifically includes:
a dividing unit for dividing the display image into pixel partitions corresponding to each backlight partition;
a duty ratio obtaining unit for obtaining a backlight duty ratio of each backlight partition;
the distribution information acquisition unit is used for acquiring the backlight brightness distribution information of each type of pixel points in the pixel partition corresponding to any one backlight partition; and the number of the first and second groups,
and the processing unit is used for superposing the backlight brightness distribution information of the same type of pixel points in all the pixel partitions according to the backlight duty ratios of all the backlight partitions and the backlight brightness distribution information of each type of pixel points in the pixel partitions corresponding to any one of the backlight partitions to obtain the backlight brightness distribution information of each type of pixel points in the display image after the partition backlight.
7. The display brightness adjustment apparatus according to claim 6, wherein the duty ratio obtaining unit specifically includes:
the gray-scale value acquisition subunit is used for acquiring the gray-scale value of each pixel partition; and the number of the first and second groups,
and the duty ratio calculating subunit is used for calculating the backlight duty ratio of the backlight subarea corresponding to the pixel subarea according to the pixel gray-scale value of each pixel subarea.
8. The display brightness adjusting apparatus according to claim 5, wherein the color lights emitted by the sub-pixels in the display image through the partitioned backlight include yellow light and blue light, so that the pixel points of the red sub-pixel and the green sub-pixel are of the same type, and the pixel points of the blue sub-pixel are of the same type; or the color light emitted by the sub-pixels in the display image through the partition backlight comprises red light, green light and blue light, so that the pixel points of the red sub-pixels are of one type, the pixel points of the green sub-pixels are of one type, and the pixel points of the blue sub-pixels are of one type.
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| CN102097067A (en) * | 2009-12-11 | 2011-06-15 | 乐金显示有限公司 | Local dimming driving method and device of liquid crystal display device |
| CN102314844A (en) * | 2010-07-09 | 2012-01-11 | 乐金显示有限公司 | Liquid crystal indicator and local dimming drive the method for this liquid crystal indicator |
| CN102667904A (en) * | 2009-12-16 | 2012-09-12 | 杜比实验室特许公司 | Method and system for backlight control using statistical attributes of image data blocks |
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| KR102194571B1 (en) * | 2014-10-23 | 2020-12-24 | 엘지디스플레이 주식회사 | Method of data conversion and data converter |
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| CN101599255A (en) * | 2008-06-04 | 2009-12-09 | 株式会社瑞萨科技 | LCD drive g device |
| CN102097067A (en) * | 2009-12-11 | 2011-06-15 | 乐金显示有限公司 | Local dimming driving method and device of liquid crystal display device |
| CN102667904A (en) * | 2009-12-16 | 2012-09-12 | 杜比实验室特许公司 | Method and system for backlight control using statistical attributes of image data blocks |
| CN102314844A (en) * | 2010-07-09 | 2012-01-11 | 乐金显示有限公司 | Liquid crystal indicator and local dimming drive the method for this liquid crystal indicator |
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