CN110660365A - Regional backlight control method, display and storage medium - Google Patents
Regional backlight control method, display and storage medium Download PDFInfo
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- CN110660365A CN110660365A CN201911065004.7A CN201911065004A CN110660365A CN 110660365 A CN110660365 A CN 110660365A CN 201911065004 A CN201911065004 A CN 201911065004A CN 110660365 A CN110660365 A CN 110660365A
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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
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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Abstract
The invention discloses a regional backlight control method, a display and a storage medium, wherein the method comprises the following steps: acquiring regional gray characteristic values which correspond to each backlight region and are used for expressing gray information when the backlight module runs; comparing the area gray characteristic value of each backlight area with a preset characteristic threshold value so as to divide each backlight area into a highlight area or a dark part area; the backlight brightness is increased for all highlight areas and decreased for all dark areas. According to the invention, after the gray characteristic information of the backlight area subjected to attribution division is extracted, the backlight of each backlight area can be adjusted according to the specific display content of the display and the required picture expression, so that the picture gray expression and dynamic contrast effect are improved, and a more real and natural picture is presented.
Description
Technical Field
The present invention relates to the field of displays, and in particular, to a method for controlling area backlight, a display, and a storage medium.
Background
With the rapid development of display technology, the resolution of the display is higher and higher, and the image display processing functions that can be realized are more and more. In the prior art, dividing a display into a plurality of regions and dimming different regions has become an indispensable backlight adjustment technique in displays.
In the existing partitioned backlight adjustment technology, the partitioned backlight control of the display can be performed only through a pre-stored algorithm or real-time setting of a user, but due to the application of the technology, the backlight brightness does not correspond to the currently displayed content when the display runs, so that the gray scale expression and dynamic contrast effect of the displayed picture are poor, and a real and natural picture cannot be presented.
Disclosure of Invention
The invention mainly aims to provide a regional backlight control method, a display and a storage medium, and aims to solve the technical problems that the existing backlight technology is easy to cause picture gray scale expression and poor dynamic contrast effect.
In order to achieve the above object, the present invention provides a method for controlling regional backlight, which is applied to a display and comprises the following steps:
acquiring regional gray characteristic values which correspond to each backlight region and are used for expressing gray information when the backlight module runs;
comparing the area gray characteristic value of each backlight area with a preset characteristic threshold value so as to divide each backlight area into a highlight area or a dark part area;
the backlight brightness is increased for all highlight areas and decreased for all dark areas.
Optionally, the step of comparing the area grayscale characteristic value of each backlight area with a preset characteristic threshold to divide each backlight area into a highlight area or a dark area includes:
comparing the area gray characteristic value of each backlight area with a preset first characteristic threshold value and a preset second characteristic threshold value respectively, wherein the first characteristic threshold value is smaller than the second characteristic threshold value;
if the area gray characteristic value is smaller than the first characteristic threshold value, dividing the corresponding backlight area into a dark part area;
and if the area gray characteristic value is greater than the second characteristic threshold value, dividing the corresponding backlight area into high-brightness areas.
Optionally, after the step of comparing the area grayscale characteristic values of the respective backlight areas with the preset first characteristic threshold and the second characteristic threshold, the method further includes:
if the area gray characteristic value is larger than the first characteristic threshold value and smaller than the second characteristic threshold value, the corresponding backlight area belongs to the conventional area.
Optionally, the step of obtaining the area grayscale characteristic value corresponding to each backlight area and used for representing grayscale information during the operation of the backlight module includes:
acquiring sub-pixel values of three sub-pixels of each pixel of each backlight area when the backlight module runs;
taking the maximum pixel value of the three sub-pixel values of each pixel as the gray value of each pixel;
and calculating the regional gray characteristic value of each backlight region for representing gray information according to the gray values of all pixels in each backlight region.
Optionally, the area gray characteristic value calculation formula of each backlight area is as follows:
wherein, B is the sum of the gray values of all pixels in each backlight area, n is the number of pixels contained in each backlight area, and Y is the regional gray characteristic value of each backlight area.
Optionally, the step of increasing the backlight brightness of all the highlight areas and decreasing the backlight brightness of all the dark areas includes:
the duty ratio of the backlight is increased for all the highlight areas and decreased for all the dark areas.
Optionally, the step of increasing the duty ratio of the backlight of all the highlight areas and decreasing the duty ratio of the backlight of all the dark areas comprises:
reducing the duty ratio of the backlight in the dark part area to (Y/255)r1Increasing the duty ratio of the backlight of the highlight region to (Y/255)r2(ii) a Wherein r1 and r2 are preset duty cycle parameters, r1>1，0<r2<1。
Optionally, after the step of increasing the backlight brightness of all the highlight areas and decreasing the backlight brightness of all the dark areas, the method further includes:
taking a backlight area which does not belong to a highlight area and a dark area as a conventional area;
setting the duty ratio of the backlight of all the regular areas to (Y1/255)r1+(Y-Y1)/(Y2-Y1)*(Y2-(Y/255)r1) (ii) a Wherein Y1 is the first characteristic threshold value, and Y2 is the second characteristic threshold value.
In addition, to achieve the above object, the present invention further provides a display, which includes a memory, a processor, and a regional backlight control program stored in the memory and executable on the processor, wherein: the regional backlight control program, when executed by the processor, implements the steps of the regional backlight control method as described above.
Further, to achieve the above object, the present invention also provides a computer readable storage medium having stored thereon an area backlight control program which, when executed by a processor, implements the steps of the area backlight control method as described above.
According to the regional backlight control method, the display and the storage medium provided by the embodiment of the invention, when the backlight module normally operates, the regional gray characteristic value of each backlight region is calculated according to the range of the backlight region divided in advance. And comparing the area gray characteristic value with a preset characteristic threshold value to determine that the backlight area corresponding to the area gray characteristic value belongs to a highlight area or a dark part area. After all the backlight areas are classified, the backlight brightness of all the highlight areas is increased, and the backlight brightness of all the dark areas is decreased. After extracting the gray characteristic information of the backlight areas subjected to attribution division, the backlight of each backlight area can be adjusted according to the specific display content of the display and the required image expression, the image gray expression and the dynamic contrast effect are improved, and a more real and natural image is presented.
Drawings
FIG. 1 is a schematic diagram of an apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for controlling area backlight according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating a regional backlight control method according to a third embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a display, or a terminal device with a display function such as a television, a smart phone, a tablet computer, an electronic book reader, an MP3(Moving Picture Experts Group Audio Layer III, motion Picture Experts compression standard Audio Layer 3) player, an MP4(Moving Picture Experts Group Audio Layer IV, motion Picture Experts compression standard Audio Layer 4) player, a portable computer and the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display screen based on the ambient light level and a proximity sensor that turns off the display screen and/or backlight when the hardware device is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the motion sensor is stationary, and can be used for applications (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration) for recognizing the attitude of hardware equipment, and related functions (such as pedometer and tapping) for vibration recognition; of course, the hardware device may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and so on, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, the terminal according to the embodiment of the present invention takes a display as an example, and the memory 1005 serving as a computer storage medium may include an operating system, a network communication module, a user interface module, and an area backlight control program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the area backlight control program stored in the memory 1005, and perform the following operations:
acquiring regional gray characteristic values which correspond to each backlight region and are used for expressing gray information when the backlight module runs;
comparing the area gray characteristic value of each backlight area with a preset characteristic threshold value so as to divide each backlight area into a highlight area or a dark part area;
the backlight brightness is increased for all highlight areas and decreased for all dark areas.
Further, the processor 1001 may call the area backlight control program stored in the memory 1005, and also perform the following operations:
comparing the area gray characteristic value of each backlight area with a preset first characteristic threshold value and a preset second characteristic threshold value respectively, wherein the first characteristic threshold value is smaller than the second characteristic threshold value;
if the area gray characteristic value is smaller than the first characteristic threshold value, dividing the corresponding backlight area into a dark part area;
and if the area gray characteristic value is greater than the second characteristic threshold value, dividing the corresponding backlight area into high-brightness areas.
Further, the processor 1001 may call the area backlight control program stored in the memory 1005, and also perform the following operations:
if the area gray characteristic value is larger than the first characteristic threshold value and smaller than the second characteristic threshold value, the corresponding backlight area belongs to the conventional area.
Further, the processor 1001 may call the area backlight control program stored in the memory 1005, and also perform the following operations:
acquiring sub-pixel values of three sub-pixels of each pixel of each backlight area when the backlight module runs;
taking the maximum pixel value of the three sub-pixel values of each pixel as the gray value of each pixel;
and calculating the regional gray characteristic value of each backlight region for representing gray information according to the gray values of all pixels in each backlight region.
Further, the processor 1001 may call the area backlight control program stored in the memory 1005, and also perform the following operations:
the area gray characteristic value calculation formula of each backlight area is as follows:
wherein, B is the sum of the gray values of all pixels in each backlight area, n is the number of pixels contained in each backlight area, and Y is the regional gray characteristic value of each backlight area.
Further, the processor 1001 may call the area backlight control program stored in the memory 1005, and also perform the following operations:
the duty ratio of the backlight is increased for all the highlight areas and decreased for all the dark areas.
Further, the processor 1001 may call the area backlight control program stored in the memory 1005, and also perform the following operations:
reducing the duty ratio of the backlight in the dark part area to (Y/255)r1Increasing the duty ratio of the backlight of the highlight region to (Y/255)r2(ii) a Wherein r1 and r2 are preset duty cycle parameters, r1>1，0<r2<1。
Further, the processor 1001 may call the area backlight control program stored in the memory 1005, and also perform the following operations:
taking a backlight area which does not belong to a highlight area and a dark area as a conventional area;
setting the duty ratio of the backlight of all the regular areas to (Y1/255)r1+(Y-Y1)/(Y2-Y1)*(Y2-(Y/255)r1) (ii) a Wherein Y1 is the first characteristic threshold value, and Y2 is the second characteristic threshold value.
The specific embodiment of the present invention applied to the display is substantially the same as the following embodiments of the application area backlight control method, and is not described herein again.
Referring to fig. 2, fig. 2 is a flowchart illustrating a regional backlight control method according to a first embodiment of the present invention, wherein the regional backlight control method is applied to a display, and includes the following steps:
step S10, obtaining the regional gray characteristic value corresponding to each backlight region for representing gray information when the backlight module is running;
the present embodiment is applied to a Display, which may be an LCD (Liquid Crystal Display). The LCD, as a light transmissive type display device, needs to provide brightness required for displaying an image through a backlight module during display. The backlight module on the display can be divided into a plurality of areas, and the display can respectively control the backlight brightness of the backlight module in each area. Specifically, the backlight module may be divided into H rows and L columns of H × L total regions, and after the range of each backlight region is determined, the number of pixels in each region may be directly determined. And determining the regional gray characteristic value of each backlight region according to the pixel value of the pixel point in each backlight region. The regional gray characteristic value is a parameter value representing the gray of the backlight region, and the regional gray characteristic value of each backlight region can be obtained by calculation according to corresponding parameters of all pixel points in the region. When the regional gray characteristic value increases, the gray parameter in the backlight region is increased. When the area gray characteristic value is reduced, the gray parameter in the backlight area is reduced.
Step S20, comparing the area gray characteristic value of each backlight area with a preset characteristic threshold value to divide each backlight area into a highlight area or a dark portion area;
after calculating the area grayscale characteristic value of each backlight area, the display may compare the area grayscale characteristic value of each backlight area with a preset characteristic threshold value to divide the backlight area into a dark area or a highlight area according to the area grayscale characteristic value. According to the preset characteristic threshold value, the regional gray characteristic value of each backlight region can be divided, the backlight region corresponding to the regional gray characteristic value with the high threshold value and the characteristic threshold value is determined as a highlight region, and the backlight region corresponding to the regional gray characteristic value lower than the preset characteristic threshold value is determined as a dark part region.
In step S30, the backlight luminance is increased in all the highlight areas and decreased in all the dark areas.
After determining each backlight area of the backlight module as a highlight area or a dark area, the display may increase the backlight brightness of all the highlight areas and decrease the backlight brightness of all the dark areas. By reducing the backlight brightness of the dark area, the dynamic contrast of the display picture can be effectively improved, and the reality of the picture content and the picture expression of the dark area are improved.
In the above embodiment, when the backlight module normally operates to provide the backlight required by the display to display the picture, the area gray characteristic value of each backlight area is calculated according to the range of the backlight area divided in advance. And comparing the area gray characteristic value with a preset characteristic threshold value to determine that the backlight area corresponding to the area gray characteristic value is divided into a highlight area or a dark part area. After all the backlight areas are classified, the backlight brightness of all the highlight areas is increased, and the backlight brightness of all the dark areas is decreased. In this embodiment, after extracting the grayscale feature information of the backlight area after the attribution division, the backlight of each backlight area can be adjusted according to the specific display content of the display and the required image representation, thereby improving the image grayscale representation and the dynamic contrast effect, and presenting a more real and natural image.
Further, based on the above-mentioned embodiment shown in fig. 2, in the second embodiment of the area backlight control method according to the present invention, the step S20 of comparing the area grayscale characteristic value of each backlight area with the preset characteristic threshold to divide each backlight area into a highlight area or a dark area includes:
step S21, comparing the area grayscale characteristic value of each backlight area with a preset first characteristic threshold and a preset second characteristic threshold, wherein the first characteristic threshold is smaller than the second characteristic threshold;
step S22, if the area grayscale characteristic value is smaller than the first characteristic threshold, dividing the corresponding backlight area into a dark area;
in step S23, if the area grayscale characteristic value is greater than the second characteristic threshold, the corresponding backlight area is divided into highlight areas.
In this embodiment, the preset feature threshold includes a first feature threshold and a second feature threshold, where the first feature threshold is smaller than the second feature threshold. After determining the regional grayscale eigenvalues for the respective backlight regions, each regional grayscale eigenvalue is compared to a first characteristic threshold and a second characteristic threshold. If the area gray characteristic value of a certain backlight area is smaller than the first characteristic threshold value, the backlight area corresponding to the area gray characteristic value can be divided into a dark part area; if the regional gray scale feature value of a certain backlight region is greater than the second feature threshold, the backlight region corresponding to the regional gray scale feature value can be divided into highlight regions. After all backlight areas are subjected to attribution division of highlight areas or dark areas, the backlight brightness of the highlight areas can be improved, and the backlight brightness of the dark areas can be reduced. It is to be understood that, in the above-described embodiment, the case where the region grayscale characteristic value is equal to the first characteristic threshold value or the second characteristic threshold value is not limited. Therefore, when the area gradation feature value of a certain backlight area is equal to the first feature threshold value or the second feature threshold value, the certain backlight area may be classified as a dark area or a highlight area, or the certain backlight area may not be classified as a dark area or a highlight area. Through the two preset characteristic threshold values, the backlight area can be accurately subjected to attribution division according to the parameter of the area gray characteristic value of each area obtained through calculation, so that the backlight brightness of different backlight areas is adjusted specifically and effectively, and the bright and dark display effect of the picture is guaranteed.
Further, based on the second embodiment, in step S21, the comparing the area grayscale characteristic values of the backlight areas with a preset first characteristic threshold and a preset second characteristic threshold, where after the step of comparing the first characteristic threshold with the second characteristic threshold, the method further includes:
in step S24, if the area grayscale characteristic value is greater than the first characteristic threshold and smaller than the second characteristic threshold, the corresponding backlight area belongs to the normal area.
In this embodiment, since the preset first characteristic threshold is smaller than the second characteristic threshold, when the area grayscale characteristic value corresponding to a certain backlight area is between the first characteristic threshold and the second characteristic threshold, the backlight area corresponding to the area grayscale characteristic value may be assigned to the normal area to distinguish from the highlight area and the dark area. When the area gray characteristic value is equal to the first characteristic threshold value, the backlight area can be assigned to a dark part area or a normal area; likewise, when the regional gray feature value is equal to the second feature threshold value, the backlight region may also be assigned to a highlight region or a normal region. By dividing each backlight area into three different area affiliations, different backlight brightness adjustment can be performed for the three types of affiliation areas, so that the overall brightness difference of the picture is improved, and the display effect of the picture is improved.
Further, referring to fig. 3, fig. 3 is a flowchart illustrating a third embodiment of the area backlight control method according to the present invention, based on the embodiment illustrated in fig. 2, in step S10, the step of acquiring the area grayscale characteristic value for representing the grayscale information corresponding to each backlight area when the backlight module runs includes:
step S11, obtaining sub-pixel values of three sub-pixels of each pixel of each backlight area when the backlight module runs;
step S12, taking the maximum pixel value of the three sub-pixel values of each pixel as the gray value of each pixel;
in step S13, a region gray characteristic value for representing gray information of each backlight region is calculated according to the gray values of all the pixels in each backlight region.
In this embodiment, when the backlight module operates, since each backlight region is divided in advance, the positions and the number of the pixels in each backlight region are also determined. The display may obtain sub-pixel values for three sub-pixels of each pixel within each backlight region. Each pixel on the display is composed of three primary colors, red, green and blue, and each color on each pixel is a sub-pixel of the pixel. The three sub-pixel values at the pixel point may constitute the color of the pixel. For example, the sub-pixel values of the three sub-pixels are (255,0,0), (0,255,0), (0,0,255), (255 ), and (0,0,0) respectively indicate that the color of the pixel is red, green, blue, white, and black. After determining the three sub-pixel values for each pixel, the largest pixel value of the three sub-pixel values is taken as the gray scale value for the pixel. For example, if the three sub-pixel values of a certain pixel are (156,240,138), the gray scale value of the pixel is 240. After determining the gray values of all pixels of each backlight area, the area gray characteristic value of the backlight area can be calculated according to the gray value of each pixel, and the gray information of the backlight area can be represented by the area gray characteristic value.
It should be noted that, the above-mentioned method of obtaining the maximum pixel value of the three sub-pixel values as the gray scale value is only one obtaining method of the gray scale value, and an average value of the three sub-pixel values may also be used as the gray scale value or the corresponding gray scale value may be obtained by performing weighted average on the three sub-pixel values.
Further, in the third embodiment, the area gray characteristic value calculation formula of each backlight area is as follows:
wherein, B is the sum of the gray values of all pixels in each backlight area, n is the number of pixels contained in each backlight area, and Y is the regional gray characteristic value of each backlight area. Since the backlight area is divided in advance, the number of pixels in each backlight area is a fixed value, that is, n is a constant. And adding the gray values of all the pixels according to the acquired gray value of each pixel in the backlight area to obtain the sum B of the gray values, and calculating by using the regional gray characteristic value calculation formula to obtain the regional gray characteristic value Y of each backlight area. The regional gray characteristic value Y calculated according to the gray value parameters of all pixels in the backlight region can show the current gray information of the backlight region, so that the display can adjust the backlight brightness of the backlight region according to the gray information of the backlight region, and the image display effect of the display is improved.
Further, in a fourth embodiment of the area backlight control method according to the present invention, based on the embodiment shown in fig. 3, the step S30 of increasing the backlight luminance of all the high luminance areas and decreasing the backlight luminance of all the dark areas includes:
the duty ratio of the backlight is increased for all the highlight areas and decreased for all the dark areas.
In this embodiment, the duty ratio of the backlight in the highlight region is increased, that is, the ratio of the on time of the backlight to the switching period is increased, so that the backlight brightness in the highlight region can be increased; similarly, by reducing the duty ratio of the backlight in the dark area, the backlight luminance in the dark area can be reduced. Therefore, the picture with the adjusted backlight brightness meets the actual performance requirement, and a more real and natural picture effect is presented.
Preferably, based on the fourth embodiment described above, the display can reduce the duty ratio of the backlight in the dark area to (Y/255)r1Increasing the duty ratio of the backlight in the highlight region to (Y/255)r2. Wherein r1 and r2 are preset duty cycle parameters, r1>1，0<r2<1. According to the above formula for calculating the regional gray characteristic values, the gray value of each pixel is necessarily between 0 and 255, so the regional gray characteristic value of each backlight region is also between 0 and 255, i.e. Y is greater than or equal to 0 and less than or equal to 255. Due to r1>1，0<r2<1, therefore for the dark area, (Y/255)r1<(Y/255); for highlight region, (Y/255)<(Y/255)r2. The duty ratio adjustment can effectively reduce the backlight duty ratio of the dark part area and improve the backlight duty ratio of the highlight area.
Further, in the above-described embodiment, after the backlight area is divided into the highlight area or the dark portion area according to the area gradation feature value of each backlight area, if there is a backlight area that does not belong to either the highlight area or the dark portion area, the backlight area of this portion is regarded as the normal area, and the backlight duty adjustment for the normal area is set to (Y1/255)r1+(Y-Y1)/(Y2-Y1)*(Y2-(Y/255)r1). Wherein Y1 and Y2 are the first and second characteristic thresholds, respectively. By adjusting the backlight duty ratio of the normal area, the backlight brightness of the normal area with the area gray characteristic value close to the dark part area is closer to the backlight duty ratio of the dark part area, and the backlight brightness of the normal area close to the highlight area is closer to the backlight duty ratio of the highlight area. Therefore, the brightness change of the backlight area in the process of dynamic change between the dark area and the high-brightness area is softer, and the brightness is reducedAbrupt change in time.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, on which an area backlight control program is stored, where the storage medium may be the Memory 1005 in the terminal in fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes several instructions to enable a member device (which may be a mobile phone, a computer, a server, or a television, etc.) having a processor to execute the area backlight control method according to the embodiments of the present invention.
It is to be understood that throughout the description of the present specification, reference to the term "one embodiment", "another embodiment", "other embodiments", or "first through nth embodiments", etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
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.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The regional backlight control method is applied to a display and comprises the following steps:
acquiring regional gray characteristic values which correspond to each backlight region and are used for expressing gray information when the backlight module runs;
comparing the area gray characteristic value of each backlight area with a preset characteristic threshold value so as to divide each backlight area into a highlight area or a dark part area;
the backlight brightness is increased for all highlight areas and decreased for all dark areas.
2. The area backlight control method of claim 1, wherein the step of comparing the area gray characteristic value of each backlight area with a preset characteristic threshold value to divide each backlight area into a highlight area or a dark area comprises:
comparing the area gray characteristic value of each backlight area with a preset first characteristic threshold value and a preset second characteristic threshold value respectively, wherein the first characteristic threshold value is smaller than the second characteristic threshold value;
if the area gray characteristic value is smaller than the first characteristic threshold value, dividing the corresponding backlight area into a dark part area;
and if the area gray characteristic value is greater than the second characteristic threshold value, dividing the corresponding backlight area into high-brightness areas.
3. The method as claimed in claim 2, wherein after the step of comparing the local gray scale feature values of the backlight areas with the preset first feature threshold and the second feature threshold, the method further comprises:
if the area gray characteristic value is larger than the first characteristic threshold value and smaller than the second characteristic threshold value, the corresponding backlight area belongs to the conventional area.
4. The area backlight control method of claim 1, wherein the step of obtaining the area gray scale feature value for representing gray scale information corresponding to each backlight area during the operation of the backlight module comprises:
acquiring sub-pixel values of three sub-pixels of each pixel of each backlight area when the backlight module runs;
taking the maximum pixel value of the three sub-pixel values of each pixel as the gray value of each pixel;
and calculating the regional gray characteristic value of each backlight region for representing gray information according to the gray values of all pixels in each backlight region.
5. The area backlight control method of claim 4, wherein the area gray scale feature value calculation formula of each backlight area is:
wherein, B is the sum of the gray values of all pixels in each backlight area, n is the number of pixels contained in each backlight area, and Y is the regional gray characteristic value of each backlight area.
6. The area backlight control method of claim 5, wherein the step of increasing the backlight brightness of all the high brightness areas and decreasing the backlight brightness of all the dark area comprises:
the duty ratio of the backlight is increased for all the highlight areas and decreased for all the dark areas.
7. The area backlight control method of claim 6, wherein the step of increasing the duty ratio of the backlight for all the highlight areas and decreasing the duty ratio of the backlight for all the dark areas comprises:
reducing the duty ratio of the backlight in the dark part area to (Y/255)r1Increasing the duty ratio of the backlight of the highlight region to (Y/255)r2(ii) a Wherein r1 and r2 are preset duty cycle parameters, r1>1，0<r2<1。
8. The area backlight control method of claim 7, wherein after the step of increasing the backlight brightness of all the high-luminance areas and decreasing the backlight brightness of all the dark-portion areas, further comprising:
taking a backlight area which does not belong to a highlight area and a dark area as a conventional area;
setting the duty ratio of the backlight of all the regular areas to (Y1/255)r1+(Y-Y1)/(Y2-Y1)*(Y2-(Y/255)r1) (ii) a Wherein Y1 is the first characteristic threshold value, and Y2 is the second characteristic threshold value.
9. A display comprising a memory, a processor, and a regional backlight control program stored on the memory and executable on the processor, wherein: the zone backlight control program when executed by the processor implements the steps of the zone backlight control method of any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon an area backlight control program which, when executed by a processor, implements the steps of the area backlight control method according to any one of claims 1 to 8.
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| PCT/CN2020/103564 WO2021082542A1 (en) | 2019-11-01 | 2020-07-22 | Regional backlight control method, display, and storage medium |
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