CN111179863A - Backlight adjusting method and device and display device - Google Patents
Backlight adjusting method and device and display device Download PDFInfo
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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
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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
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Abstract
The application discloses a backlight adjusting method, a backlight adjusting device and a display device, wherein the method comprises the following steps: dividing the backlight unit into a first number of backlight partitions corresponding to the first image data; judging a highlight portion and a low-dark portion in the first image data; calculating the sum of the number of pixels of which the first pixel component, the second pixel component and the third pixel component exceed respective brightness preset values according to the first image data; calculating the total proportion value of the pixel components exceeding the brightness preset value in the total pixel components according to the sum of the number of the pixels of which the first pixel component, the second pixel component and the third pixel component exceed the respective brightness preset values; judging whether the proportional value exceeds a preset proportional value or not; if the ratio exceeds the preset ratio value, the brightness value of the low-dark part pixel component in the first image data is reduced. According to the method, when the backlight of the display panel is compensated, the pixel component with the brightness value lower than the target brightness value does not exceed the white balance upper limit value after compensation, and the white balance is prevented from being disturbed.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a backlight adjusting method and apparatus, and a display apparatus.
Background
Local-dimming (Local-dimming) is a method for effectively improving the display contrast of a liquid crystal display. By dividing the screen into several sections, the brightness of the section corresponding to the highlight in the image can be maximized, while the brightness of the section corresponding to the dark part can be reduced, even the backlight is turned off, to achieve the best contrast.
The local backlight adjusting algorithm comprises two parts of backlight brightness adjustment and image data compensation: backlight brightness adjustment: the backlight is divided into a certain number of subareas, and the appropriate backlight brightness of the subareas is calculated according to the input image data corresponding to each subarea, so that the brightness of each subarea of the backlight changes in real time along with the input picture. Image data compensation: because of in the subregion in a poor light, the position luminance that is more far away from the lamp pearl is lower, and the halo of lamp pearl also can shine adjacent subregion. Therefore, image data at different distances from the lamp beads need to be compensated to different degrees according to the range and brightness (light type) of the backlight halo of each region.
When the local backlight adjustment function is realized by a timing control chip (TCON), the conventional local backlight adjustment algorithm may conflict with the white balance correction algorithm under certain circumstances, and disturb white balance.
Disclosure of Invention
The embodiment of the application provides a backlight adjusting method, and aims to solve the problem that in the backlight adjusting method in the prior art, the white balance of image data is disturbed.
In a first aspect, the present application provides a backlight adjusting method applied to a display device, the display device including a display panel and a backlight unit, the method including:
dividing the backlight unit into a first number of backlight partitions according to a preset rule, wherein the backlight partitions correspond to first image data, and the first image data comprises a brightness value of a first pixel component, a brightness value of a second pixel component and a brightness value of a third pixel component;
judging a highlight part and a low-dark part in the first image data;
calculating the sum of the number of pixels of which the first pixel component, the second pixel component and the third pixel component exceed respective brightness preset values according to the first image data;
calculating the total proportion value of the pixel components exceeding the brightness preset value in the current partition in the total pixel components according to the sum of the number of the pixels of which the first pixel component, the second pixel component and the third pixel component exceed the respective brightness preset values;
judging whether the proportional value exceeds a preset proportional value or not;
and if the proportion value exceeds the preset proportion value, reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data.
Further, the method further comprises:
if the ratio value exceeds the preset ratio value, the brightness values of the first pixel component, the second pixel component and the third pixel component of the highlight part in the first image data are kept unchanged.
Further, the dividing the backlight unit into a first number of backlight partitions according to a preset rule, where the backlight partitions correspond to the first image data, includes:
inputting initial image data into the display panel;
dividing the backlight unit into a first number of backlight partitions according to a preset rule;
the initial image data is divided into a first number of first image data according to a first number of the backlight partitions.
Further, the determining the highlight portion and the low-dark portion in the first image data includes:
calculating a target brightness value of the first image data according to the first image data;
determining a part of the first image data with brightness higher than the target brightness value as a highlight part;
and determining that the part of the first image data with the brightness lower than the target brightness value is a low-dark part.
Further, the method further comprises:
if the ratio value does not exceed the preset ratio value, reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data, and increasing the brightness values of the first pixel component, the second pixel component and the third pixel component of the high-bright part in the first image data.
Further, the backlight unit includes a lamp bead, and the reducing the brightness values of the first pixel component, the second pixel component, and the third pixel component of the low-dark portion in the first image data includes:
judging the distance between the pixel component with the brightness value smaller than the preset value and the lamp bead in the current partition;
and adjusting the voltage between the pixel components with the brightness values smaller than the preset value according to the distance, and reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data.
Further, the first preset value, the second preset value and the third preset value are increased or decreased according to different image input data corresponding to different partitions.
In a second aspect, the present application provides a backlight adjusting apparatus, comprising:
the partitioning module is used for partitioning the backlight unit into a first number of backlight partitions according to a preset rule, wherein the backlight partitions correspond to first image data, and the first image data comprises a brightness value of a first pixel component, a brightness value of a second pixel component and a brightness value of a third pixel component;
the first judging module is used for judging a highlight part and a low-dark part in the first image data;
the first calculation module is used for calculating the sum of the number of pixels of which the first pixel component, the second pixel component and the third pixel component exceed respective preset brightness values according to the first image data;
the second calculation module is used for calculating the total proportion value of the pixel components exceeding the brightness preset value in the current partition in the total pixel components according to the sum of the number of the pixels exceeding the brightness preset values of the first pixel component, the second pixel component and the third pixel component;
the second judgment module is used for judging whether the proportional value exceeds a preset proportional value or not;
and the adjusting module is used for reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data if the proportion value exceeds the preset proportion value.
Further, the adjusting module is further configured to: if the ratio value exceeds the preset ratio value, the brightness values of the first pixel component, the second pixel component and the third pixel component of the highlight part in the first image data are kept unchanged.
In a third aspect, the present application provides a display device comprising a display panel and a backlight unit comprising a backlight adjustment device as described above.
According to the backlight adjusting method provided by the embodiment of the application, the target brightness value in the backlight partition is calculated by judging whether the pixel components exceeding the preset value exist in the pixel components of the backlight partition, and if the pixel components exceeding the preset value exist, the pixel components with the brightness values lower than the target brightness value in the backlight partition are reduced, so that when the backlight of the display panel is compensated, the pixel components with the brightness values lower than the target brightness value do not exceed the upper limit value of white balance after compensation, and the white balance is prevented from being disturbed.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a schematic flow chart illustrating a backlight adjusting method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a step 10 according to an embodiment of the present invention;
fig. 3 is a schematic view of a backlight adjusting apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
White balance correction (White-tracking): the white color of the lcd is prone to color cast, i.e. the color temperature deviates from the white point, so the white balance correction function for color correction of the input image data is already a necessary conventional function in the timing control chip.
In general, the higher the voltage applied to the liquid crystal electrode, the higher the luminance of the pixel will be. However, due to the material characteristics of the lcd panel and the color gamut of the backlight, the red, green and blue pixels may not exhibit optimal white when the same voltage is applied. When this phenomenon occurs, the white balance correction function of the timing controller is required to correct three colors of red, green and blue for each gray scale. In which the blue component is usually "hacked", i.e. the highest blue gray level is down-scaled to a suitable value (hereinafter referred to as WT upper limit), and then the blue component of other gray levels is also down-scaled based on the highest blue gray level, so as to perform white balance adjustment. The frequent need of pressing down blue is caused by physical factors such as screen material characteristics, color gamut of backlight light source, process deviation and the like
However, when the conventional local backlight adjustment is combined, if the image corresponding to a certain backlight partition contains blue data of different gray scales and the set of blue data contains a higher value (close to the WT upper limit value), the adjusted white balance will be disturbed.
The embodiment of the present invention provides a backlight adjusting method, which is applied to a display device, where the display device includes a display panel and a backlight unit. Specifically, referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a backlight adjusting method provided by the present invention, the method including:
10. the backlight unit is divided into a first number of backlight partitions according to a preset rule, the backlight partitions correspond to first image data, and the first image data comprises a brightness value of a first pixel component, a brightness value of a second pixel component and a brightness value of a third pixel component.
11. The highlight portion and the low-dark portion in the first image data are judged.
12. And calculating the sum of the number of pixels of which the first pixel component, the second pixel component and the third pixel component exceed respective preset brightness values according to the first image data.
13. And calculating the total proportion value of the pixel components exceeding the brightness preset value in the current partition in the total pixel components according to the sum of the number of the pixels of which the first pixel component, the second pixel component and the third pixel component exceed the respective brightness preset values.
14. And judging whether the proportional value exceeds a preset proportional value or not.
15. And if the proportion value exceeds a preset proportion value, reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data.
In the backlight adjusting method provided by the embodiment of the invention, the target brightness value in the backlight partition is calculated by judging whether the pixel components exceeding the preset value exist in the pixel components of the backlight partition, and if the pixel components exceeding the preset value exist, the pixel components with the brightness values lower than the target brightness value in the backlight partition are reduced, so that when the backlight of the display panel is compensated, the pixel components with the brightness values lower than the target brightness value do not exceed the upper limit value of white balance after compensation, and the white balance is prevented from being disturbed.
In some embodiments of the present invention, as shown in fig. 2, which is a schematic flow chart of an embodiment of step 10 provided in the present invention, step 10 may include:
20. initial image data is input to the display panel.
21. The backlight unit is divided into a first number of backlight partitions according to a preset rule.
22. The initial image data is divided into a first number of first image data according to the first number of backlight partitions.
Specifically, in the embodiment of the present invention, the display screen finally seen by the human eye is a superimposed effect of the screen initial image of the input display panel and the backlight unit. The backlight is divided into a certain number of partitions, and different partitions are compensated to different degrees according to the input image data corresponding to each corresponding partition, so that a display picture with higher contrast is output.
Specifically, the backlight unit is divided into a first number of backlight partitions according to a preset rule, and the initial image data is also divided into a first number of first image data according to the same preset rule, wherein the first image data and the backlight partitions are arranged in a one-to-one correspondence manner. In an embodiment of the present invention, the first image data may include a luminance value of the first pixel component, a luminance value of the second pixel component, and a luminance value of the third pixel component. Specifically, the first pixel component, the second pixel component and the third pixel component may be one of red, green and blue pixels, respectively. That is, the luminance value of the first pixel component, the luminance value of the second pixel component and the luminance value of the third pixel component are the luminance values corresponding to the red, green and blue pixel components in the first image data, respectively.
Meanwhile, in the embodiment of the present invention, the first image data corresponding to different partitions may be the same or different, depending on the input initial image data. The number of the partitions can be adjusted according to actual conditions, and the method for partitioning the backlight unit can also refer to the prior art, which is not limited herein.
On the basis of the above embodiment, the backlight unit further includes a lamp bead, and in the backlight partition, the farther away from the lamp bead, the lower the position is, and the halo of the lamp bead is also irradiated to the adjacent partition. Therefore, image data which are separated from the lamp beads by different distances need to be compensated to different degrees according to the halo range and the brightness of the backlight partition.
In the embodiment of the present invention, the backlight adjusting method provided by the present invention is described by taking any one backlight partition as an example. In some embodiments of the present invention, determining the highlight portion and the low-dark portion in the first image data may include:
and calculating a target brightness value of the first image data according to the first image data.
A portion of the first image data having a luminance higher than the target luminance value is determined as a highlight portion.
A portion of the first image data having a luminance lower than the target luminance value is determined to be a low-dark portion.
In the embodiment of the present invention, since the backlight compensates the input image data, an appropriate brightness of the backlight in a current partition is calculated, which is a target brightness value, and the backlight adjusts the image data according to the target brightness value.
In the current partition, a target brightness value of image data is calculated according to first image data in the current partition, and the brightness value of each pixel in the first image data is compared with the target brightness value. In the first image data, pixels having luminance values greater than the target luminance value are defined as highlight portions in the first image data, and pixels having luminance values less than the target luminance value are defined as low-dark portions in the first image data.
In the embodiment of the present invention, it is necessary to count the sum of the number of pixels, in the first image data corresponding to the current partition, of which the first pixel component, the second pixel component, and the third pixel component exceed respective preset brightness values.
Specifically, in some embodiments of the present invention, the first pixel component corresponds to a first preset value, the second pixel component corresponds to a second preset value, and the third pixel component corresponds to a third preset value. The first preset value, the second preset value and the third preset value may be the same or different, and the specific data size of the first preset value, the second preset value and the third preset value is related to the initial image data, the display panel parameter and the backlight unit parameter. And in different partitions, the sizes of the first preset value, the second preset value and the third preset value are increased or decreased according to different image input data corresponding to different partitions.
In an embodiment of the present invention, eight bits are taken as an example, that is, any pixel unit in the initial image data can be represented by one eight-bit number, and the first pixel component is a red pixel component, the second pixel component is a green pixel component, and the third pixel component is a blue pixel component. At this time, in any one backlight partition, the first preset value corresponding to the first pixel component, that is, the red pixel component, may be 1020, the second preset value corresponding to the second pixel component, that is, the green pixel component, may be 1000, and the third preset value corresponding to the third pixel component, that is, the blue pixel component, may be 950.
At this time, in the first backlight partition, the luminance values of the pixels of the first pixel component range from 500 to 1023, and the pixel components of the first pixel component having luminance values exceeding the first preset value 1020, that is, the pixel values having luminance values in the range from 1020 to 1023, are considered as the pixel components having luminance values exceeding the first preset value. And counting to obtain the number of the first pixel components with the brightness values exceeding a first preset value in the current partition. Similarly, the number of second pixel components with luminance values exceeding the second preset value and the number of third pixel components with luminance values exceeding the third preset value in the current partition can be counted.
And after the number of the first pixel components with the brightness values exceeding the first preset value, the number of the second pixel components with the brightness values exceeding the second preset value and the number of the third pixel components with the brightness values exceeding the third preset value in the current partition are respectively obtained, the total number of the different pixel components exceeding the respective brightness preset values in one current partition is calculated. And calculating the total proportion value of the total number of different pixel components exceeding the respective brightness preset values in the total pixel components of the current partition.
In the above embodiment, the current partition total pixel component refers to the total number of all pixels in the current partition.
In some embodiments of the present invention, if there is a pixel component in the current partition that exceeds the corresponding preset value, and after calculating the total proportion value of all the pixel components exceeding the preset value in the total pixel components in the current partition, it is further required to determine whether the calculated proportion value exceeds the preset proportion value.
If the calculated total proportion value exceeds the preset proportion value, the backlight partition outputs a first mixed brightness, and the first mixed brightness comprises:
directly outputting the brightness value of the pixel component with the brightness value exceeding the target brightness value in the current partition;
and reducing the brightness value of the pixel component with the brightness value lower than the target brightness value in the current partition and outputting the pixel component.
That is, if the calculated total ratio value exceeds the preset ratio value, the luminance values of the first pixel component, the second pixel component, and the third pixel component of the highlight portion in the first image data are directly output while being maintained. In the first image data, the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part are output after being reduced.
Specifically, in the embodiment of the present invention, the backlight unit further includes a lamp bead, and the reducing the luminance values of the first pixel component, the second pixel component, and the third pixel component of the low-dark portion in the first image data may include:
judging the distance between the pixel component with the brightness value smaller than the preset value and the lamp bead in the current partition;
and adjusting the voltage between the pixel components with the brightness values smaller than the preset value according to the distance, and reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data.
Specifically, the distance between the bead and the pixel component with the brightness value smaller than the preset value in the current partition needs to be calculated respectively, then the brightness value of the pixel component needing to be adjusted is calculated according to the distance and the target brightness value, and the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data are reduced by directly changing the voltage at the two ends of the pixel component.
The first mixed brightness output by the method does not raise and compensate the pixel component with the brightness value higher than the target brightness value, thereby avoiding the condition that the brightness value of the part of the pixel component exceeds the WT upper limit value and the white balance is disturbed.
In other embodiments of the present invention, if the calculated total ratio value does not exceed the preset ratio value, the backlight partition outputs a second mixed brightness, which includes: lifting the brightness value of the pixel component with the brightness value exceeding the target brightness value in the current partition and outputting the pixel component; and reducing the brightness value of the pixel component with the brightness value lower than the target brightness value in the current partition and outputting the pixel component.
Specifically, if the calculated total ratio value does not exceed the preset ratio value, the luminance values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data are reduced, and the luminance values of the first pixel component, the second pixel component and the third pixel component of the high-bright part in the first image data are increased.
Meanwhile, in some embodiments of the present invention, the backlight adjusting method provided by the present invention may further include: if the brightness value of any pixel in the current partition does not exceed the corresponding preset value, the backlight partition outputs a third mixed brightness, and the third mixed brightness comprises: lifting the brightness value of the pixel component with the brightness value exceeding the target brightness value in the current partition and outputting the pixel component; and reducing the brightness value of the pixel component with the brightness value lower than the target brightness value in the current partition and outputting the pixel component.
Specifically, if the brightness value of any pixel in the current partition does not exceed the corresponding preset value, the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data are reduced, and the brightness values of the first pixel component, the second pixel component and the third pixel component of the high-bright part in the first image data are increased.
The present invention also provides a display device, as shown in fig. 3, which is a schematic view of an embodiment of a backlight adjusting device provided by the present invention, the backlight adjusting device 30 includes:
a partitioning module 31, configured to divide the backlight unit into a first number of backlight partitions according to a preset rule, where the backlight partitions correspond to first image data, and the first image data includes a luminance value of a first pixel component, a luminance value of a second pixel component, and a luminance value of a third pixel component;
a first judgment module 32, configured to judge a highlight portion and a low-dark portion in the first image data;
a first calculating module 33, configured to calculate, according to the first image data, a sum of numbers of pixels of which the first pixel component, the second pixel component, and the third pixel component exceed respective preset brightness values;
a second calculating module 34, configured to calculate a total proportion value of the pixel components exceeding the preset brightness value in the current partition in the total pixel components according to a sum of numbers of pixels of which the first pixel component, the second pixel component, and the third pixel component exceed respective preset brightness values;
the second judging module 35 is configured to judge whether the proportional value exceeds a preset proportional value;
the adjusting module 36 is configured to reduce the luminance values of the first pixel component, the second pixel component, and the third pixel component in the low-dark portion in the first image data if the ratio exceeds the preset ratio.
The backlight adjusting device provided by the invention calculates the target brightness value in the backlight partition by judging whether the pixel components exceeding the preset value exist in the pixel components of the backlight partition, and reduces the pixel components with the brightness values lower than the target brightness value in the backlight partition if the pixel components exceeding the preset value exist, so that the pixel components with the brightness values lower than the target brightness value do not exceed the upper limit value of white balance after compensation when the backlight of the display panel is compensated, and the white balance is prevented from being disturbed.
On the basis of the above embodiment, the adjusting module 36 is further configured to: if the proportion value exceeds the preset proportion value, the brightness values of the first pixel component, the second pixel component and the third pixel component of the highlight part in the first image data are kept unchanged.
The invention also provides a display device, which comprises a display panel and a backlight unit, wherein the backlight unit comprises the backlight adjusting device for adjusting the backlight so as to output an optimal image for display.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The backlight adjusting method, the backlight adjusting device and the display device provided by the embodiments of the present application are described in detail above, and specific examples are applied in the text to explain the principle and the implementation of the present application, and the description of the above embodiments is only used to help understanding the technical solutions and the core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A backlight adjusting method applied to a display device including a display panel and a backlight unit, the method comprising:
dividing the backlight unit into a first number of backlight partitions according to a preset rule, wherein the backlight partitions correspond to first image data, and the first image data comprises a brightness value of a first pixel component, a brightness value of a second pixel component and a brightness value of a third pixel component;
judging a highlight part and a low-dark part in the first image data;
calculating the sum of the number of pixels of which the first pixel component, the second pixel component and the third pixel component exceed respective brightness preset values according to the first image data;
calculating the total proportion value of the pixel components exceeding the brightness preset value in the current partition in the total pixel components according to the sum of the number of the pixels of which the first pixel component, the second pixel component and the third pixel component exceed the respective brightness preset values;
judging whether the proportional value exceeds a preset proportional value or not;
and if the proportion value exceeds the preset proportion value, reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data.
2. The backlight adjustment method of claim 1, further comprising:
if the ratio value exceeds the preset ratio value, the brightness values of the first pixel component, the second pixel component and the third pixel component of the highlight part in the first image data are kept unchanged.
3. The backlight adjusting method according to claim 1, wherein the dividing the backlight unit into a first number of backlight partitions according to a preset rule, the backlight partitions corresponding to the first image data comprises:
inputting initial image data into the display panel;
dividing the backlight unit into a first number of backlight partitions according to a preset rule;
the initial image data is divided into a first number of first image data according to a first number of the backlight partitions.
4. The backlight adjustment method according to claim 1, wherein the determining the highlight portion and the low-dark portion in the first image data comprises:
calculating a target brightness value of the first image data according to the first image data;
determining a part of the first image data with brightness higher than the target brightness value as a highlight part;
and determining that the part of the first image data with the brightness lower than the target brightness value is a low-dark part.
5. The backlight adjustment method of claim 1, further comprising:
if the ratio value does not exceed the preset ratio value, reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data, and increasing the brightness values of the first pixel component, the second pixel component and the third pixel component of the high-bright part in the first image data.
6. The backlight adjusting method according to claim 1, wherein the backlight unit includes a lamp bead, and the reducing the luminance values of the first pixel component, the second pixel component, and the third pixel component of the low-dark portion in the first image data includes:
judging the distance between the pixel component with the brightness value smaller than the preset value and the lamp bead in the current partition;
and adjusting the voltage between the pixel components with the brightness values smaller than the preset value according to the distance, and reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data.
7. The backlight adjustment method of claim 1, wherein the first preset value, the second preset value and the third preset value are increased or decreased according to different image input data corresponding to different partitions.
8. A backlight adjustment device, comprising:
the partitioning module is used for partitioning the backlight unit into a first number of backlight partitions according to a preset rule, wherein the backlight partitions correspond to first image data, and the first image data comprises a brightness value of a first pixel component, a brightness value of a second pixel component and a brightness value of a third pixel component;
the first judging module is used for judging a highlight part and a low-dark part in the first image data;
the first calculation module is used for calculating the sum of the number of pixels of which the first pixel component, the second pixel component and the third pixel component exceed respective preset brightness values according to the first image data;
the second calculation module is used for calculating the total proportion value of the pixel components exceeding the brightness preset value in the current partition in the total pixel components according to the sum of the number of the pixels exceeding the brightness preset values of the first pixel component, the second pixel component and the third pixel component;
the second judgment module is used for judging whether the proportional value exceeds a preset proportional value or not;
and the adjusting module is used for reducing the brightness values of the first pixel component, the second pixel component and the third pixel component of the low-dark part in the first image data if the proportion value exceeds the preset proportion value.
9. The backlight adjustment apparatus of claim 8, wherein the adjustment module is further configured to: if the ratio value exceeds the preset ratio value, the brightness values of the first pixel component, the second pixel component and the third pixel component of the highlight part in the first image data are kept unchanged.
10. A display device, characterized in that the display device comprises a display panel and a backlight unit comprising a backlight adjustment device as claimed in claims 8-9.
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