CN108470547B - Backlight control method of display panel, computer readable medium and display device - Google Patents
Backlight control method of display panel, computer readable medium and display device Download PDFInfo
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- 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
- G09G3/3406—Control of illumination source
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Abstract
When determining that pictures corresponding to two adjacent backlight areas are similar background pictures according to the brightness value of each pixel in an image to be displayed, adjusting the backlight brightness of the two backlight areas to be consistent by using the backlight area with the larger brightness value of the pixel when a set condition is met as a reference area, namely the backlight brightness of the reference area, so that the pictures with the similar backgrounds have the same backlight brightness, and the problem of display brightness difference caused by the inconsistent backlight brightness is avoided, thereby improving the visual effect.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a backlight control method for a display panel, a computer readable medium, and a display device.
Background
In order to reduce power consumption of the lcd tv and improve contrast, a dynamic backlight control method, i.e. a Local backlight control (Local Dimming) method, is usually adopted, specifically, the backlight module is divided into a plurality of backlight areas, and the backlight brightness of each backlight area is individually controlled according to the average brightness of the corresponding screen display.
The method can effectively reduce power consumption and improve contrast, but the method also has certain defects, and brightness difference is easy to occur in adjacent backlight areas with the same background, so that visual effect is poor.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a backlight control method for a display panel, a computer readable medium and a display device, so as to improve the display effect of the dynamic backlight control method.
Therefore, an embodiment of the present invention provides a backlight control method for a display panel, including:
determining whether pictures corresponding to every two adjacent backlight areas in the backlight module are similar background pictures or not according to the brightness value of each pixel in the received image to be displayed;
when determining that the pictures corresponding to the two adjacent backlight areas are similar background pictures, determining a backlight area with a larger pixel brightness value in the two adjacent backlight areas as a reference area when a set condition is met;
and taking the backlight brightness of the reference area as the backlight brightness of the two adjacent backlight areas.
In a possible implementation manner, in the backlight control method provided in an embodiment of the present invention, the determining, according to a brightness value of each pixel in the received image to be displayed, whether a picture corresponding to each two adjacent backlight areas in the backlight module is a similar background picture specifically includes:
converting the received gray scale data of each pixel in the image to be displayed into the brightness value of each pixel;
performing histogram statistics on each backlight area according to the brightness value of each pixel corresponding to each backlight area;
analyzing each backlight area counted by the histogram to determine whether pictures corresponding to each two adjacent backlight areas are similar pictures or not;
when determining that the pictures corresponding to the two adjacent backlight areas are dissimilar pictures, determining whether picture boundaries corresponding to the two adjacent backlight areas are continuous;
when the picture boundaries corresponding to the two adjacent backlight areas are determined to be continuous, determining that the pictures corresponding to the two adjacent backlight areas are similar background pictures; and when the picture corresponding to the two adjacent backlight areas is determined not to have continuous boundaries, determining that the picture corresponding to the two adjacent backlight areas is a dissimilar background picture.
In a possible implementation manner, in the backlight control method provided in an embodiment of the present invention, the analyzing each backlight area counted by the histogram to determine whether a picture corresponding to each two adjacent backlight areas is a similar picture specifically includes:
determining the number of first coincident pixels with the same brightness value in the pictures corresponding to the two adjacent backlight areas;
determining a first percentage of the sum of the first overlapped pixel numbers in the total pixel number in the picture corresponding to the backlight area;
determining whether the first percentage is greater than a first threshold;
when the first percentage is determined to be larger than the first threshold value, determining that pictures corresponding to the two adjacent backlight areas are similar pictures;
when the first percentage is determined not to be larger than the first threshold value, determining that pictures corresponding to the two adjacent backlight areas are dissimilar pictures.
In a possible implementation manner, in the backlight control method provided in an embodiment of the present invention, the determining whether picture boundaries corresponding to the two adjacent backlight areas are continuous specifically includes:
determining the number of second combined pixels with the same brightness value in the adjacent areas of the boundary of the pictures corresponding to the two adjacent backlight areas;
determining a second percentage of the sum of the second number of overlapping pixels to the total number of pixels in the boundary adjacent region;
determining whether the second percentage is greater than a second threshold;
when the second percentage is determined to be larger than the second threshold, determining that picture boundaries corresponding to the two adjacent backlight areas are continuous;
when the second percentage is determined not to be larger than the second threshold value, determining that picture boundaries corresponding to the two adjacent backlight areas are discontinuous.
In a possible implementation manner, in the backlight control method provided by an embodiment of the present invention, the determining, as a reference region, a backlight region in which a luminance value of a pixel is larger when a set condition is satisfied, specifically includes:
sequencing the number of pixels with the same brightness value in the two adjacent backlight areas from high to low respectively;
sequentially accumulating the sorted brightness values, calculating a third percentage of the accumulated result in the total number of pixels in the picture corresponding to the backlight area until the third percentage is determined to be larger than a third threshold value, and determining the accumulated corresponding brightness value;
and selecting the backlight area with larger brightness value as the reference area.
In a possible implementation manner, in the backlight control method provided in an embodiment of the present invention, the method further includes:
when determining that the images corresponding to the two adjacent backlight areas are dissimilar background images, separately determining the backlight brightness of the two backlight areas according to the brightness value of each pixel corresponding to the backlight areas.
In a possible implementation manner, in the backlight control method provided in an embodiment of the present invention, the method further includes:
and when determining that the pictures corresponding to the two adjacent backlight areas are similar, independently determining the backlight brightness of the two backlight areas according to the brightness value of each pixel corresponding to the backlight areas.
In another aspect, the embodiment of the present invention further provides a computer-readable medium, which includes a program code, and when the program code runs on a computing device, the program code is configured to enable the computing device to execute the steps of the backlight control method provided in the embodiment of the present invention.
On the other hand, an embodiment of the present invention further provides a display device, including: display panel, backlight module and the above computer readable medium provided by the embodiments of the present invention.
The embodiment of the invention has the beneficial effects that:
according to the backlight control method, the computer readable medium and the display device of the display panel provided by the embodiment of the invention, when the images corresponding to two adjacent backlight areas are determined to be similar background images according to the brightness value of each pixel in the image to be displayed, the backlight brightness of the two backlight areas is adjusted to be consistent by using the backlight area with the larger brightness value of the pixel when the set condition is met as the reference area, namely the backlight brightness of the reference area, so that the images with the similar backgrounds have the same backlight brightness, the problem of display brightness difference caused by the inconsistent backlight brightness is avoided, and the visual effect is improved.
Drawings
FIG. 1a is a schematic diagram of an original frame to be displayed;
FIG. 1b is a schematic diagram illustrating a display effect after a conventional dynamic backlight control process;
fig. 2 is a general flow chart of a backlight control method according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a backlight control method according to an embodiment of the present invention;
fig. 4 is another schematic flow chart of a backlight control method according to an embodiment of the present invention;
fig. 5 is another schematic flow chart of a backlight control method according to an embodiment of the present invention;
fig. 6a and fig. 6b are schematic diagrams of boundary adjacent regions of a backlight region in a backlight control method according to an embodiment of the present invention;
fig. 7 is another schematic flow chart of a backlight control method according to an embodiment of the present invention;
fig. 8 is a detailed flowchart of a backlight control method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the 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 invention.
Although the existing dynamic backlight control method can effectively reduce power consumption and improve contrast, because the correlation of pictures corresponding to adjacent backlight areas is not considered when the backlight brightness is calculated, different visual effects appear on pictures with similar backgrounds due to different calculated backlight brightness. As shown in fig. 1a, an original picture to be displayed is shown, wherein a backlight area where three stars are located and a surrounding backlight area have the same night sky background; as shown in fig. 1b, for the display effect after the dynamic backlight control processing, the backlight brightness of the backlight area where three stars are located is higher than that of the backlight area in the night sky without stars, so that the same night sky picture has the display effect with different brightness, thereby causing the visual effect to be poor.
Based on this, an embodiment of the present invention provides a backlight control method for a display panel, as shown in fig. 2, which may include the following steps:
s201, determining whether pictures corresponding to every two adjacent backlight areas in the backlight module are similar background pictures or not according to the brightness value of each pixel in the received image to be displayed; s202, when determining that the pictures corresponding to the two adjacent backlight areas are similar background pictures, executing the step S202;
s202, determining a backlight area with a larger pixel brightness value as a reference area when a set condition is met in two adjacent backlight areas;
and S203, taking the backlight brightness of the reference area as the backlight brightness of two adjacent backlight areas.
Specifically, in the backlight control method provided by the embodiment of the present invention, the backlight module is divided into a plurality of backlight regions arranged in a matrix in advance, where two adjacent backlight regions include two backlight regions adjacent in the horizontal direction and two backlight regions adjacent in the vertical direction. In addition, the frame corresponding to each backlight area generally includes a plurality of pixels arranged in a matrix with the same number, and when the frame corresponding to the backlight area at the edge is applied to the irregular display panel, the number of pixels included in the frame corresponding to the backlight area at the edge may not be the same as the number of pixels included in the frame corresponding to the backlight area at the center, which is not limited herein.
Specifically, in the backlight control method provided in the embodiment of the present invention, when determining that the picture corresponding to two adjacent backlight regions is a similar background picture according to the brightness value of each pixel in the image to be displayed, the backlight brightness of the two backlight regions is adjusted to be the same, that is, the backlight brightness of the reference region, by using the backlight region in which the brightness value of the pixel is larger when the setting condition is satisfied, so that the pictures with similar backgrounds have the same backlight brightness, and the problem of display brightness difference caused by backlight brightness inconsistency is avoided, thereby improving the visual effect.
Optionally, in the backlight control method provided in the embodiment of the present invention, as shown in fig. 2, when determining that the pictures corresponding to two adjacent backlight areas are dissimilar background pictures, the method may further include the following steps:
and S204, independently determining the backlight brightness of the two backlight areas according to the brightness value of each pixel corresponding to the backlight area.
Specifically, in the backlight control method provided in the embodiment of the present invention, when determining that the pictures corresponding to two adjacent backlight areas are dissimilar background pictures, the backlight brightness of the two backlight areas may be determined according to a conventional manner, for example, the backlight brightness of the backlight area may be determined according to the average brightness displayed by the corresponding pictures. In addition, the backlight brightness of the backlight area may be adjusted in cooperation with a Peak Driving (Peak Driving) manner under the condition of ensuring that the power consumption is reduced, which is not described herein again. Moreover, the backlight brightness may also be determined in the same manner for the reference region determined in step S202, which is not described herein again.
Optionally, in the backlight control method provided in the embodiment of the present invention, in step S201, according to the brightness value of each pixel in the received image to be displayed, it is determined whether a picture corresponding to each two adjacent backlight areas in the backlight module is a similar background picture, as shown in fig. 3, the method may specifically include the following steps:
s301, converting received gray scale data of each pixel in an image to be displayed into a brightness value of each pixel; specifically, converting an input RGB data signal into an HSV color space, and selecting a V value in the HSV color space; wherein H represents hue, S represents saturation, and V represents lightness, i.e., luminance value;
s302, carrying out histogram statistics on each backlight area according to the brightness value of each pixel corresponding to each backlight area; specifically, after histogram statistics is performed, the pixel number distribution of each different luminance value corresponding to each backlight region is obtained, for example, as shown in the middle two columns in table 1 below;
s303, analyzing each backlight area counted by the histogram to determine whether the picture corresponding to each two adjacent backlight areas is a similar picture; specifically, it may be determined whether the distribution of the luminance values is uniform; when determining that the pictures corresponding to the two adjacent backlight areas are dissimilar pictures, executing step S304;
s304, determining whether picture boundaries corresponding to two adjacent backlight areas are continuous or not; when it is determined that the picture boundaries corresponding to two adjacent backlight areas are continuous, step S305 is executed; when the picture boundaries corresponding to the two adjacent backlight areas are determined to be discontinuous, executing step S306;
s305, determining pictures corresponding to two adjacent backlight areas as similar background pictures;
s306, determining the picture corresponding to the two adjacent backlight areas as dissimilar background pictures.
Specifically, in the backlight control method provided in the embodiment of the present invention, when determining a similar background picture, first, it is determined whether two adjacent backlight areas correspond to the similar picture by comparison, and only when the picture correlation is not high, the possibility of the same background is present, so that on the basis of determining a dissimilar picture, a picture boundary is determined to determine whether the picture is the similar background picture.
Optionally, in the backlight control method provided in the embodiment of the present invention, when determining that the pictures corresponding to the two adjacent backlight areas are similar, step S204 may be further performed to separately determine the backlight luminances of the two backlight areas according to the luminance values of the pixels corresponding to the backlight areas.
Optionally, in the backlight control method provided in the embodiment of the present invention, S303 analyzes each backlight area counted by the histogram, and determines whether a picture corresponding to each two adjacent backlight areas is a similar picture, as shown in fig. 4, the method may specifically include the following steps:
s401, determining the number of first coincident pixels with the same brightness value in the picture corresponding to two adjacent backlight areas; for example, as shown in table 1 below, the middle two columns list the number of pixels with brightness values from 0 to 255 in the picture corresponding to the two adjacent backlight areas a and B, and the right side lists the number of first overlapped pixels with the same brightness value, that is, the number of pixels Min (a, B) when the brightness value is the same, for example, when the brightness value is 2, the number of pixels in the backlight area a is 10, and the number of pixels in the backlight area B is 20, the number of first overlapped pixels is 10;
s402, determining the first percentage of the sum of the first overlapped pixel number in the total pixel number in the picture corresponding to the backlight area; for example, the total number of pixels T1 can be obtained by summing the numbers of the first overlapped pixels corresponding to the rightmost luminance values 0 to 255 in table 1, and the first percentage is T1/M1 if the total number of pixels in the backlight area is M1;
s403, determining whether the first percentage T1/M1 is greater than a first threshold Y1; the value of the first threshold value Y1 is between 0 and 1, preferably about 0.9, and when the first percentage T1/M1 is determined to be greater than the first threshold value Y1, the step S404 is executed; upon determining that the first percentage is not greater than the first threshold, then performing step S405;
s404, determining pictures corresponding to two adjacent backlight areas as similar pictures; the picture similarity corresponding to the two background areas is extremely high, the gray scale distribution is similar, and then the backlight brightness can be determined independently; in particular, the backlight brightness of the two backlight areas may be determined in a conventional manner, for example, the backlight brightness of the backlight area may be determined according to the average brightness of the corresponding picture display. Moreover, the backlight brightness of the backlight area can be adjusted in a Peak drawing (Peak drawing) manner under the condition of ensuring that the power consumption is reduced, which is not described herein;
s405, determining that pictures corresponding to two adjacent backlight areas are dissimilar pictures, namely, the pictures corresponding to the two background areas have low correlation, but the pictures have the same background.
TABLE 1
Optionally, in the backlight control method provided in the embodiment of the present invention, S304 determines whether picture boundaries corresponding to two adjacent backlight areas are continuous, as shown in fig. 5, the method may specifically include the following steps:
s501, determining the number of second overlapped pixels with the same brightness value in adjacent areas of the boundary of pictures corresponding to two adjacent backlight areas; specifically, when two adjacent backlight regions are horizontally arranged, as shown in fig. 6a, the boundary adjacent region refers to at least one column of pixels (shown by hatching in the figure) adjacent to the backlight region; when two adjacent backlight regions are vertically arranged, as shown in fig. 6b, the boundary adjacent region refers to at least one row of pixels (shown by hatching) adjacent to the backlight region; for example, as shown in table 2 below, the left side lists the number of pixels with luminance values in the boundary adjacent regions C and D corresponding to the two adjacent backlight regions, and the right side lists the number of second combined pixels with the same luminance value, that is, the number of pixels Min (C, D) when the same luminance value exists, for example, when the luminance value is 2, the number of pixels in the boundary adjacent region C is 10, and the number of pixels in the boundary adjacent region D is 30, the number of second combined pixels is 10;
s502, determining the second percentage of the sum of the number of the second overlapped pixels in the total number of the pixels in the adjacent area of the boundary; for example, the total number of pixels T2 can be obtained by summing the numbers of the second combined pixels at the rightmost side in table 2, and the second percentage is T2/M2 if the total number of pixels in the boundary adjacent region is M2; for example, in table 2, the same luminance values are 1, 2, 25, and 26, and the sum of the numbers of the second combined pixels is 10+10+50+20, or 90; if the total number of pixels in the boundary adjacent regions is 200, T2/M2 is 0.45;
s503, determining whether the second percentage T2/M2 is greater than a second threshold Y2; the value of the second threshold Y2 is between 0 and 1, preferably about 0.3, and when it is determined that the second percentage T2/M2 is greater than the second threshold Y2, for example, T2/M2 is 0.45>0.3, step S504 is executed; when it is determined that the second percentage is not greater than the second threshold, performing step S505;
s504, determining picture boundaries corresponding to two adjacent backlight areas to be continuous;
and S505, determining that the picture boundaries corresponding to the two adjacent backlight areas are discontinuous.
TABLE 2
Optionally, in the backlight control method provided in the embodiment of the present invention, the step S202 determines, as a reference region, a backlight region with a larger corresponding luminance value in two adjacent backlight regions, and as shown in fig. 7, may specifically include the following steps:
s701, sequencing the number of pixels with the same brightness value in two adjacent backlight areas from high to low; for example, as shown in table 3a, the number of pixels with brightness values from 0 to 255 in the picture corresponding to two adjacent backlight areas E and F is listed, and as shown in table 3b, the number of pixels in the backlight areas E and F is sorted from high to low;
s702, sequentially accumulating the sorted brightness values;
s703, calculating a third percentage of the accumulated result in the total number of pixels in the picture corresponding to the backlight area;
s704, determining whether the third percentage is larger than a third threshold value; specifically, the value of the third threshold value Y3 is between 0 and 1, and preferably about 0.3; if yes, go to step S705; if not, returning to the step S702;
s705, determining the corresponding accumulated brightness value;
s706, the backlight area with a large luminance value is selected as the reference area.
For example, it is determined whether the third percentage of the first pixel count 1000 and the total pixel count of the backlight area E in table 3b is greater than 0.3, if not, the sum is 500, it is determined whether the third percentage of the total pixel count is greater than 0.3, and so on, and when the third percentage of the total pixel count is greater than 0.3, it is determined that the brightness value corresponding to the sum is 2; judging whether the third percentage of the first pixel number 1000 and the total pixel number of the backlight area F in the table 3b is greater than 0.3, if not, accumulating 500, judging whether the third percentage of the 1000+500 and the total pixel number is greater than 0.3, and so on, when the third percentage of the 1000+500 … … +300 and the total pixel number is greater than 0.3, determining that the brightness value corresponding to the accumulation at this time is 255, and selecting the backlight area F as the reference area because 255 is greater than 2.
| Brightness value | Number of pixels in backlight region E | Number of pixels in backlight region F |
| 0 | 0 | 10 |
| 1 | 10 | 10 |
| 2 | 20 | 10 |
| …… | …… | …… |
| 25 | 500 | 500 |
| 26 | 1000 | 1000 |
| …… | …… | …… |
| 254 | 0 | 0 |
| 255 | 0 | 300 |
TABLE 3a
TABLE 3b
Specifically, fig. 8 is a complete flowchart of the backlight control method according to the embodiment of the present invention, including the following steps:
s801, receiving gray scale data of each pixel in an image to be displayed;
s802, converting the received gray scale data of each pixel in the image to be displayed into the brightness value of each pixel;
s803, performing histogram statistics on each backlight area according to the brightness value of each pixel corresponding to each backlight area;
s804, determining the number of first coincident pixels with the same brightness value in the picture corresponding to the two adjacent backlight areas;
s805, determining the first percentage of the sum of the first overlapped pixel number in the total pixel number in the picture corresponding to the backlight area;
s806, determining whether the first percentage is larger than a first threshold value; upon determining that the first percentage is greater than the first threshold, performing step S807; upon determining that the first percentage is not greater than the first threshold, then perform step S808;
s807, determining the picture corresponding to the two adjacent backlight areas as a similar picture; step S823 is performed;
s808, determining pictures corresponding to two adjacent backlight areas as dissimilar pictures;
s809, determining the number of second combined pixels with the same brightness value in the adjacent areas of the boundary of the pictures corresponding to the two adjacent backlight areas;
s810, determining a second percentage of the sum of the number of the second combined pixels in the total number of the pixels in the adjacent area of the boundary;
s811, determining whether the second percentage is greater than a second threshold; when it is determined that the second percentage is greater than the second threshold, performing step S812; when it is determined that the second percentage is not greater than the second threshold, step S813 is performed;
s812, determining the picture boundaries corresponding to the two adjacent backlight areas to be continuous; executing step S814;
s813, determining that picture boundaries corresponding to two adjacent backlight areas are discontinuous; step S815 is executed;
s814, determining pictures corresponding to the two adjacent backlight areas as similar background pictures; step S816 is executed;
s815, determining pictures corresponding to the two adjacent backlight areas as dissimilar background pictures; step S823 is performed;
s816, respectively sequencing the number of pixels with the same brightness value in two adjacent backlight areas from high to low;
s817, sequentially accumulating the sorted brightness values;
s818, calculating a third percentage of the accumulated result in the total number of pixels in the picture corresponding to the backlight area;
s819, determining whether the third percentage is larger than a third threshold value; if yes, go to step S820; if not, returning to the step S817;
s820, determining the accumulated corresponding brightness value;
s821, selecting a backlight area with a larger brightness value as a reference area;
s822, taking the backlight brightness of the reference area as the backlight brightness of two adjacent backlight areas;
s823 separately determines the backlight luminance of the two backlight regions according to the luminance value of each pixel corresponding to the backlight region. In particular, the backlight brightness of the two backlight areas may be determined in a conventional manner, for example, the backlight brightness of the backlight area may be determined according to the average brightness of the corresponding picture display. In addition, the backlight brightness of the backlight area may be adjusted in cooperation with a Peak Driving (Peak Driving) manner under the condition of ensuring that the power consumption is reduced, which is not described herein again.
Based on the same inventive concept, embodiments of the present invention also provide a computer-readable medium, which includes program code for causing a computing device to perform the steps of the backlight control method provided by the embodiments of the present invention when the program code runs on the computing device. Since the principle of solving the problem of the computer-readable medium is similar to the backlight control method of the display panel, the implementation of the computer-readable medium can refer to the implementation of the backlight control method, and repeated details are not repeated.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A display product according to an embodiment of the present invention may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a server device. However, the program product of the present invention is not limited thereto, and in this document, the readable storage medium may be any tangible medium containing or storing the program, which can be used by or in connection with an information transmission, apparatus, or device.
A readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the periodic network action system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, including: display panel, backlight module and the above computer readable medium provided by the embodiments of the present invention. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. The implementation of the display device can refer to the above embodiment of the backlight control method, and repeated details are not repeated.
Through the above description of the embodiments, it is clear to those skilled in the art that the embodiments of the present invention may be implemented by hardware, or by software plus a necessary general hardware platform. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods according to the embodiments of the present invention.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the backlight control method, the computer readable medium and the display device of the display panel provided by the embodiment of the invention, when determining that the images corresponding to the two adjacent backlight areas are similar background images according to the brightness value of each pixel in the image to be displayed, the backlight brightness of the two backlight areas is adjusted to be consistent by using the backlight area with the larger brightness value of the pixel when the set condition is met as the reference area, namely the backlight brightness of the reference area, so that the images with the similar backgrounds have the same backlight brightness, the problem of display brightness difference caused by the inconsistent backlight brightness is avoided, and the visual effect is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A backlight control method of a display panel, comprising:
determining whether pictures corresponding to every two adjacent backlight areas in the backlight module are similar background pictures or not according to the brightness value of each pixel in the received image to be displayed;
when determining that the pictures corresponding to the two adjacent backlight areas are similar background pictures, determining a backlight area with a larger pixel brightness value in the two adjacent backlight areas as a reference area when a set condition is met;
taking the backlight brightness of the reference area as the backlight brightness of the two adjacent backlight areas;
the determining, according to the brightness value of each pixel in the received image to be displayed, whether a picture corresponding to each two adjacent backlight areas in the backlight module is a similar background picture specifically includes:
converting the received gray scale data of each pixel in the image to be displayed into the brightness value of each pixel;
performing histogram statistics on each backlight area according to the brightness value of each pixel corresponding to each backlight area;
analyzing each backlight area counted by the histogram to determine whether pictures corresponding to each two adjacent backlight areas are similar pictures or not;
when determining that the pictures corresponding to the two adjacent backlight areas are dissimilar pictures, determining whether picture boundaries corresponding to the two adjacent backlight areas are continuous;
when the picture boundaries corresponding to the two adjacent backlight areas are determined to be continuous, determining that the pictures corresponding to the two adjacent backlight areas are similar background pictures; and when the picture boundaries corresponding to the two adjacent backlight areas are determined to be discontinuous, determining that the pictures corresponding to the two adjacent backlight areas are dissimilar background pictures.
2. The backlight control method of claim 1, wherein the analyzing each backlight area counted by the histogram to determine whether the picture corresponding to each two adjacent backlight areas is a similar picture comprises:
determining the number of first coincident pixels with the same brightness value in the pictures corresponding to the two adjacent backlight areas;
determining a first percentage of the sum of the first overlapped pixel numbers in the total pixel number in the picture corresponding to the backlight area;
determining whether the first percentage is greater than a first threshold;
when the first percentage is determined to be larger than the first threshold value, determining that pictures corresponding to the two adjacent backlight areas are similar pictures;
when the first percentage is determined not to be larger than the first threshold value, determining that pictures corresponding to the two adjacent backlight areas are dissimilar pictures.
3. The backlight control method according to claim 1, wherein the determining whether the picture boundaries corresponding to the two adjacent backlight areas are continuous specifically comprises:
determining the number of second combined pixels with the same brightness value in the adjacent areas of the boundary of the pictures corresponding to the two adjacent backlight areas;
determining a second percentage of the sum of the second number of overlapping pixels to the total number of pixels in the boundary adjacent region;
determining whether the second percentage is greater than a second threshold;
when the second percentage is determined to be larger than the second threshold, determining that picture boundaries corresponding to the two adjacent backlight areas are continuous;
when the second percentage is determined not to be larger than the second threshold value, determining that picture boundaries corresponding to the two adjacent backlight areas are discontinuous.
4. The backlight control method according to any one of claims 1 to 3, wherein the determining, as a reference region, a backlight region in which a luminance value of a pixel is large when a set condition is satisfied, in the two adjacent backlight regions specifically includes:
sequencing the number of pixels with the same brightness value in the two adjacent backlight areas from high to low respectively;
sequentially accumulating the sorted brightness values, calculating a third percentage of the accumulated result in the total number of pixels in the picture corresponding to the backlight area until the third percentage is determined to be larger than a third threshold value, and determining the accumulated corresponding brightness value;
and selecting the backlight area with larger brightness value as the reference area.
5. The backlight control method of any one of claims 1-3, further comprising:
when determining that the images corresponding to the two adjacent backlight areas are dissimilar background images, separately determining the backlight brightness of the two backlight areas according to the brightness value of each pixel corresponding to the backlight areas.
6. The backlight control method of any one of claims 1-3, further comprising:
and when determining that the pictures corresponding to the two adjacent backlight areas are similar, independently determining the backlight brightness of the two backlight areas according to the brightness value of each pixel corresponding to the backlight areas.
7. A computer readable medium, characterized in that it comprises program code for causing a computing device to carry out the steps of the backlight control method according to any one of claims 1 to 6, when said program code is run on said computing device.
8. A display device, comprising: a display panel, a backlight module, and the computer readable medium of claim 7.
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| CN110619855B (en) * | 2019-09-30 | 2021-02-26 | 京东方科技集团股份有限公司 | Display device and driving method thereof |
| CN114860059B (en) * | 2022-05-12 | 2023-10-31 | 深圳市华云电源有限公司 | LED display screen power supply control method and device, electronic equipment and medium |
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