CN110619854B - Brightness adjusting method of display module and display device - Google Patents
Brightness adjusting method of display module and display device Download PDFInfo
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- CN110619854B CN110619854B CN201910903187.9A CN201910903187A CN110619854B CN 110619854 B CN110619854 B CN 110619854B CN 201910903187 A CN201910903187 A CN 201910903187A CN 110619854 B CN110619854 B CN 110619854B
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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
- G09G3/3406—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
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
Abstract
The invention provides a brightness adjusting method of a display module and a display device. The display module comprises a display panel and a backlight module, and the brightness adjusting method is used for adjusting the brightness of the backlight module; the backlight module comprises a multiplied by b backlight partitions, the backlight partitions have a first backlight numerical value and a backlight coefficient, and a and b are positive integers; the brightness adjusting method comprises the following steps: determining the number of rows and columns of the dimming matrix; determining a target backlight partition needing dimming; determining an auxiliary backlight partition for a plurality of auxiliary dimmings; establishing a plurality of virtual backlight partitions; determining a target dimming matrix; generating a second backlight numerical value P' of the target backlight partition according to the first backlight numerical values and corresponding backlight coefficients of the target backlight partition, the auxiliary backlight partition and the virtual backlight partition in the target dimming matrix; and setting the backlight brightness of the target backlight subarea according to the second backlight numerical value P'. In the invention, the backlight brightness of the backlight subareas at the edge part in the backlight module is smoothly transited.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a brightness adjusting method of a display module and a display device.
[ background of the invention ]
In the prior art, a display module includes a display panel and a backlight module, and the brightness of the backlight module is adjusted by Local Dimming (Local Dimming). The backlight module is divided into a plurality of backlight subareas, and the backlight brightness of each backlight subarea is adjusted respectively. However, the local dimming technique has a poor dimming effect at the edge portion of the backlight module.
[ summary of the invention ]
In order to solve the above technical problems, the present invention provides a brightness adjusting method for a display module and a display device.
In a first aspect, the present invention provides a brightness adjusting method for a display module, where the display module includes a display panel and a backlight module, and the brightness adjusting method is used to adjust the brightness of the backlight module;
the backlight module comprises a multiplied by b backlight partitions, the backlight partitions have a first backlight numerical value and a backlight coefficient, and a and b are positive integers;
the brightness adjusting method comprises the following steps:
determining the number of rows and the number of columns of a dimming matrix, wherein the dimming matrix comprises e rows and f columns of the backlight subareas, a is more than or equal to e, b is more than or equal to f, and e and f are odd numbers;
determining a target backlight partition needing dimming, wherein the target backlight partition is positioned in the d column of the c row, c- (e-1)/2 < 1 or d- (f-1)/2 < 1 or a-c < (e-1)/2 or b-d < (f-1)/2, c is less than a, d is less than b, and c and d are positive integers;
determining a plurality of auxiliary backlight partitions for auxiliary dimming, the auxiliary backlight partitions located at g1Line h1Column, - (e +1)/2 < c-g1< (e +1)/2 and- (f +1)/2 < d-h1＜(f+1)/2，g1≤a，h1≤b，g1≠c，h1≠d，g1And h1Is a positive integer;
establishing a plurality of virtual backlight partitions, wherein each virtual backlight partition has the first backlight value and the backlight coefficient, and the first backlight value of each virtual backlight partition is 0;
determining a target dimming matrix comprising the target backlight partition, the auxiliary backlight partition, and the virtual backlight partition;
generating a second backlight numerical value P' of the target backlight partition according to the first backlight numerical values of the target backlight partition, the auxiliary backlight partition and the virtual backlight partition in the target dimming matrix and the corresponding backlight coefficients;
setting the backlight brightness of the target backlight partition according to the second backlight numerical value P';
wherein the content of the first and second substances,
Pijis the first backlight value of the target backlight partition, the auxiliary backlight partition or the virtual backlight partition in the ith row and jth column of the target dimming matrix, CijIs the backlight coefficient of the target backlight partition, the auxiliary backlight partition or the virtual backlight partition of the ith row and jth column in the target dimming matrix, and C is the target dimmingThe sum of the backlight coefficients of the target backlight partition and all the auxiliary backlight partitions in the light matrix, i is less than or equal to e, j is less than or equal to f, and i and j are positive integers.
In a second aspect, the present invention provides a display device that performs display according to the brightness adjustment method provided in the first aspect.
In the present invention, the first backlight value of the single backlight section is set according to the backlight luminance of the plurality of backlight light sources therein. However, at the edge portion of the backlight module, the first backlight value of the target backlight partition is not smoothly transited with the first backlight value of the adjacent backlight partition. Thus, the backlight brightness of the target backlight partition needs to be adjusted without taking its first backlight value. For this, the target backlight partition, the auxiliary backlight partition, and the virtual backlight partition are used as the backlight partition of the target dimming matrix. Thus, all backlight partitions of the target dimming matrix are provided with the first backlight values and backlight coefficients. Wherein the virtual backlight partition does not emit backlight, and the first backlight value of the virtual backlight partition is 0. Then, the target dimming matrix generates a second backlight value P' of the target backlight partition using the first backlight values of the target backlight partition, the auxiliary backlight partition and the virtual backlight partition and the corresponding backlight coefficients. Thereby, the plurality of backlight partitions of the edge portion in the backlight module are sequentially used as the target backlight partition and their backlight luminance is sequentially adjusted. The target dimming matrix is filled by using the virtual backlight partition, so that the target dimming matrix cannot be filled by the target backlight partition and the auxiliary backlight partition. Meanwhile, the first backlight value of the virtual backlight partition is 0, and the first backlight value of the virtual backlight partition reflects the backlight brightness of the virtual backlight partition. Thus, the backlight brightness of the backlight subareas at the edge part in the backlight module is smoothly transited. Therefore, the display effect of the display module is greatly improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a brightness adjusting method for a display module according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a display module according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a backlight module in a display module according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a target dimming matrix in a brightness adjustment method for a display module according to an embodiment of the invention;
FIG. 5 is a schematic flow chart illustrating a brightness adjusting method for a display module according to another embodiment of the present invention;
FIG. 6 is a schematic flow chart illustrating a brightness adjustment method for a display module according to another embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a backlight module in another display module according to an embodiment of the invention;
FIG. 8 is a schematic diagram of a target dimming matrix in another brightness adjustment method for a display module according to an embodiment of the invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, 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 invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used herein to describe devices in accordance with embodiments of the present invention, these devices should not be limited by these terms. These terms are only used to distinguish one device from another. For example, a first device may also be referred to as a second device, and similarly, a second device may also be referred to as a first device, without departing from the scope of embodiments of the present invention.
FIG. 1 is a schematic flow chart illustrating a brightness adjusting method for a display module according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a display module according to an embodiment of the invention; FIG. 3 is a schematic structural diagram of a display module according to an embodiment of the invention; fig. 4 is a schematic diagram of a target dimming matrix in a brightness adjustment method of a display module according to an embodiment of the invention.
As shown in fig. 1 to 4, the display module 200 includes a display panel 200A and a backlight module 200B, and the brightness adjusting method 100 is used for adjusting the brightness of the backlight module 200B; the backlight module 200B includes a × B backlight partitions 210, the backlight partitions 210 have a first backlight value and a backlight coefficient, and a and B are positive integers.
The backlight module 200B emits a backlight for providing light required for display to the display panel 200A. For example, the backlight module 200B includes 8 × 12 backlight partitions 210. Each backlight partition 210 independently emits backlight. The single backlight partition 210 includes a plurality of backlight light sources. The plurality of backlight light sources of a single backlight partition 210 collectively emit backlight. The first backlight value of the single backlight partition 210 is set according to the backlight brightness of the plurality of backlight light sources therein. The backlight coefficients of the backlight partition 210 are set according to the first backlight value therein. The first backlight value and the backlight coefficient of the plurality of backlight partitions 210 are used to adjust the backlight brightness of one of the backlight partitions 210.
The brightness adjustment method 100 includes:
step S110, determining the number of rows and columns of a dimming matrix 220, wherein the dimming matrix 220 comprises e rows and f columns of backlight partitions 210, e is less than or equal to a, f is less than or equal to b, and e and f are odd numbers.
The plurality of backlight partitions 210 of the backlight module 200B serve as the plurality of backlight partitions 210 of the dimming matrix 220. The first backlight values and backlight coefficients of the plurality of backlight partitions 210 in the dimming matrix 220 are used to adjust the backlight brightness of one of the backlight partitions 210. The number of rows of the backlight partitions 210 in the dimming matrix 220 is less than or equal to the number of rows of the backlight partitions 210 in the backlight module 200B. The number of columns of the backlight partitions 210 in the dimming matrix 220 is less than or equal to the number of columns of the backlight partitions 210 in the backlight module 200B. Thus, the plurality of backlight partitions 210 of the backlight module 200B are sufficient to serve as the plurality of backlight partitions 210 of the dimming matrix 220. Optionally, the number of rows of the backlight partitions 210 in the dimming matrix 220 is equal to the number of columns of the backlight partitions 210 in the dimming matrix 220. For example, dimming matrix 220 includes 5 rows and 5 columns of backlight partitions 210. The first backlight value and backlight coefficient of the 5 row and 5 column backlight partition 210 in the dimming matrix 220 are used to adjust the backlight brightness of the 3 rd row and 3 rd column backlight partition 210 therein.
Step S120, determining a target backlight partition 211 needing dimming, wherein the target backlight partition 211 is positioned in the d column of the c row, c- (e-1)/2 < 1 or d- (f-1)/2 < 1 or a-c < (e-1)/2 or b-d < (f-1)/2, c is less than a, d is less than b, and c and d are positive integers.
The target backlight partition 211 is a real backlight partition 210 and may emit backlight whose brightness is adjusted according to the neighboring backlight partitions 210. The target backlight partition 211 is located at an edge portion of the backlight module 200B and is used in the dimming matrix 220. At the edge portion of the backlight module 200B, the first backlight value of the target backlight partition 211 is not smoothly transited from the first backlight value of the adjacent backlight partition 210. Thus, the backlight brightness of the target backlight partition 211 needs to be adjusted without taking its first backlight value. For example, the target backlight partition 211 is located at row 1, column 1. At the edge portion of the backlight module 200B, there are at least two backlight partitions 210 on the right and lower sides of the target backlight partition 211, and there are no two backlight partitions 210 on the left and upper sides of the target backlight partition 211. Meanwhile, the target backlight partition 211 serves as the backlight partition 210 of the 3 rd row and 3 rd column in the dimming matrix 220. Accordingly, the dimming matrix 220 adjusts the backlight value of the target backlight partition 211 using the first backlight value and the backlight coefficient of the backlight partition 210 therein so as to adjust the backlight luminance of the target backlight partition 211.
Step S130, determining a plurality of auxiliary dimming auxiliary backlight partitions 212, wherein the auxiliary backlight partitions 212 are located at the g-th position1Line h1Column, - (e +1)/2 < c-g1< (e +1)/2 and- (f +1)/2 < d-h1＜(f+1)/2，g1≤a，h1≤b，g1≠c，h1≠d，g1And h1Is a positive integer.
The auxiliary backlight partition 212 is a real backlight partition 210 and may emit backlight that is adjacent to the target backlight partition 211 and assists in adjusting the brightness of the target backlight partition 211. In the backlight module 200B, the auxiliary backlight partition 212 is located around the target backlight partition 211. The auxiliary backlight partitions 212 are used in the dimming matrix 220. For example, in the backlight module 200B, the target backlight partition 211 is located at row 1, column 1, and the auxiliary backlight partition 212 is located at row 1, columns 2 to 3, rows 2, columns 1 to 3, and rows 3, columns 1 to 3. In the dimming matrix 220, the target backlight partition 211 is used as the backlight partition 210 of row 3, column 3, and the auxiliary backlight partition 212 is used as the backlight partition 210 of row 3, columns 4 to 5, row 4, columns 3 to 5, and row 5, columns 3 to 5. Then, the dimming matrix 220 adjusts the backlight value of the target backlight partition 211 using the first backlight value and the backlight coefficient of the auxiliary backlight partition 212 and the other backlight partitions 210 therein, so as to adjust the backlight luminance of the target backlight partition 211.
In step S140, a plurality of virtual backlight partitions 213 are established, where the virtual backlight partitions 213 have a first backlight value and a backlight coefficient, and the first backlight value of the virtual backlight partition 213 is 0.
The virtual backlight partition 213 is not the real backlight partition 210 of the backlight module 200B. The virtual backlight partition 213 is only dummy by the algorithm and serves as the backlight partition 210 of the dimming matrix 220. For example, in the dimming matrix 220, the target backlight partition 211 is used as the backlight partition 210 of the 3 rd row and 3 rd column, and the virtual backlight partition 213 is used as the backlight partition 210 of the 1 st row and 1 st to 5 th column, the 2 nd row and 1 st to 5 th column, the 3 rd row and 1 st to 2 nd column, the 4 th row and 1 st to 2 nd column, and the 5 th row and 1 st to 2 nd column. The virtual backlight partition 213 has a first backlight value and a backlight coefficient. Thus, all backlight partitions 210 of the dimming matrix 220 are provided with the first backlight value and the backlight coefficient. Wherein the virtual backlight partition 213 does not emit backlight, the first backlight value of the virtual backlight partition 213 is 0. Then, the dimming matrix 220 adjusts the backlight value of the target backlight partition 211 using the first backlight value and the backlight coefficient of the virtual backlight partition 213 and the other backlight partitions 210 therein so as to adjust the backlight luminance of the target backlight partition 211.
In step S150, a target dimming matrix 221 is determined, where the target dimming matrix 221 includes a target backlight partition 211, an auxiliary backlight partition 212, and a virtual backlight partition 213.
The target dimming matrix 221 includes a plurality of rows and a plurality of columns of the backlight partition 210. The number of rows of backlight partitions 210 in the target dimming matrix 221 is equal to the number of rows of backlight partitions 210 in the dimming matrix 220. The number of columns of the backlight partitions 210 in the target dimming matrix 221 is equal to the number of columns of the backlight partitions 210 in the dimming matrix 220. For example, the dimming matrix 220 includes 5 rows and 5 columns of the backlight partition 210, and the target dimming matrix 221 includes 5 rows and 5 columns of the backlight partition 210. In the target dimming matrix 221, the target backlight partition 211 is used as the backlight partition 210 of the 3 rd row and 3 rd column, the auxiliary backlight partition 212 is used as the backlight partition 210 of the 3 rd row and 4 th to 5 th columns, the 4 th row and 3 rd to 5 th columns, and the 5 th row and 3 rd to 5 th columns, and the virtual backlight partition 213 is used as the backlight partition 210 of the 1 st row and 1 st to 5 th columns, the 2 nd row and 1 st to 5 th columns, the 3 rd row and 1 st to 2 nd columns, the 4 th row and 1 st to 2 nd columns, and the 5 th row and 1 st to 2 nd columns. Accordingly, the target dimming matrix 221 adjusts the backlight value of the target backlight partition 211 using the first backlight values and the backlight coefficients of all the backlight partitions 210 therein so as to adjust the backlight luminance of the target backlight partition 211.
In step S160, a second backlight value P' of the target backlight partition 211 is generated according to the first backlight values of the target backlight partition 211, the auxiliary backlight partition 212 and the virtual backlight partition 213 in the target dimming matrix 221 and the corresponding backlight coefficients.
The target dimming matrix 221 generates a second backlight value P' of the target backlight partition 211 using the first backlight values of the target backlight partition 211, the auxiliary backlight partition 212, and the virtual backlight partition 213 and the corresponding backlight coefficients. For example, the target dimming matrix 221 includes 5 rows and 5 columns of the backlight partition 210, the backlight partition 210 of the 1 st row, the 1 st to 2 nd columns and the 2 nd row, the 1 st to 2 nd columns in the backlight module 200B is sequentially used as the target backlight partition 211, and the target dimming matrix 221 sequentially generates the second backlight value P' of the backlight partition 210 of the 1 st row, the 1 st to 2 nd columns and the 2 nd row, the 1 st to 2 nd columns in the backlight module 200B. Thus, the second backlight values P' of the backlight partition 210 in the backlight module 200B of the 1 st row, 1 st to 2 nd column and the 2 nd row, 1 st to 2 nd column are smoothly transited. Thus, the display effect of the display module 200 is greatly improved.
In step S170, the backlight brightness of the target backlight partition 211 is set according to the second backlight value P'.
The display module 200 sets the backlight brightness of the target backlight partition 211 according to the second backlight value P'. For example, the target dimming matrix 221 includes 5 rows and 5 columns of the backlight partitions 210, the backlight partitions 210 in the 1 st row, the 1 st to 2 nd columns and the 2 nd rows, the 1 st to 2 nd columns in the backlight module 200B are sequentially used as the target backlight partitions 211 of the target dimming matrix 221, the target dimming matrix 221 sequentially generates the second backlight values P' of the backlight partitions 210 in the 1 st row, the 1 st to 2 nd columns and the 2 nd rows, the 1 st to 2 nd columns in the backlight module 200B, and the backlight brightness of the backlight partitions 210 in the 1 st row, the 1 st to 2 nd columns and the 2 nd rows, the 1 st to 2 nd columns in the backlight module 200B is sequentially adjusted. In this way, the backlight brightness of the backlight partition 210 in the backlight module 200B is smoothly transited between the 1 st row and the 1 st column to 2 nd column and between the 1 st row and the 2 nd column. Thus, the display effect of the display module 200 is greatly improved.
Wherein the content of the first and second substances,
Pijis a first backlight value, C, of the ith row and jth column target backlight partition 211, auxiliary backlight partition 212 or virtual backlight partition 213 of the target dimming matrix 221ijIs the backlight coefficient of the ith row and jth column target backlight partition 211, the auxiliary backlight partition 212 or the virtual backlight partition 213 in the target dimming matrix 221, and C' is the target backlight partition in the target dimming matrix 221211 and all auxiliary backlight partitions 212, i ≦ e, j ≦ f, i and j being positive integers.
In the target dimming matrix 221, the second backlight value P' of the target backlight partition 211 is equal to
The second backlight value P' is calculated by a weighted average method. Wherein the content of the first and second substances,
the backlight coefficients representing the target backlight partition 211, the auxiliary backlight partition 212 or the virtual backlight partition 213 are weighted as their first backlight values. Since the virtual backlight partition 213 does not emit backlight, C' is the sum of the backlight coefficients of the target backlight partition 211 and all auxiliary backlight partitions 212 in the target dimming matrix 221, plus the backlight coefficient of the virtual backlight partition 213. For example, the target dimming matrix 221 includes 5 rows and 5 columns of backlight partitions 210, i.e., 1 target backlight partition 211, 8 auxiliary backlight partitions 212, and 16 virtual backlight partitions 213. The second backlight value P' ═ of the target backlight partition 211 (P)11×C11+P12×C12+P13×C13+P14×C14+P15×C15+P21×C21+P22×C22+P23×C23+P24×C24+P25×C25+P31×C31+P32×C32+P33×C33+P34×C34+P35×C35+P41×C41+P42×C42+P43×C43+P44×C44+P45×C45+P51×C51+P52×C52+P53×C53+P54×C54+P55×C55)/(C33+C34+C35+C43+C44+C45+C53+C54+C55)。
In the embodiment of the present invention, the first backlight value of the single backlight partition 210 is set according to the backlight brightness of the plurality of backlight light sources therein. However, at the edge portion of the backlight module 200B, the first backlight value of the target backlight partition 211 is not smoothly transited from the first backlight value of the adjacent backlight partition 210. Thus, the backlight brightness of the target backlight partition 211 needs to be adjusted without taking its first backlight value. To this end, the target backlight partition 211, the auxiliary backlight partition, and the virtual backlight partition 213 serve as the backlight partition 210 of the target dimming matrix 221. Accordingly, all backlight partitions 210 of the target dimming matrix 221 are provided with the first backlight value and the backlight coefficient. Wherein the virtual backlight partition 213 does not emit backlight, the first backlight value of the virtual backlight partition 213 is 0. Accordingly, the target dimming matrix 221 generates the second backlight value P' of the target backlight partition 211 using the first backlight values of the target backlight partition 211, the auxiliary backlight partition 212, and the virtual backlight partition 213 and the corresponding backlight coefficients. Thereby, the plurality of backlight partitions 210 of the edge portion in the backlight module 200B are sequentially used as the target backlight partition 211 and their backlight luminance is sequentially adjusted. Here, the target dimming matrix 221 is filled with the virtual backlight partition 213, so as to avoid that the target backlight partition 211 and the auxiliary backlight partition 212 cannot fill the target dimming matrix 221. Meanwhile, the first backlight value of the virtual backlight partition 213 is 0, and the first backlight value of the virtual backlight partition 213 reflects its backlight brightness. Thus, the backlight brightness of the backlight partition 210 at the edge portion in the backlight module 200B is smoothly transited. Thus, the display effect of the display module 200 is greatly improved.
In some alternative embodiments, referring to fig. 2 and 3, in the target dimming matrix 221, the target backlight partition 211 is located at (e +1)/2 row (f +1)/2 column, and the auxiliary backlight partition 212 and the virtual backlight partition 213 surround the target backlight partition 211.
In the embodiment of the present invention, in the target dimming matrix 221, the target backlight partition 211 is located at the center, and the auxiliary backlight partition 212 and the virtual backlight partition 213 surround the center. For example, the target dimming matrix 221 includes 5 rows and 5 columns of the backlight partition 210. The target backlight partition 211 is located at row 3 and column 3 of the target dimming matrix 221. The auxiliary backlight partition 212 is located at rows 3, columns 4 to 5, rows 4, columns 3 to 5, and rows 5, columns 3 to 5 of the target dimming matrix 221. The virtual backlight partition 213 is located in the 1 st row, 1 st to 5 th columns, the 2 nd row, 1 st to 5 th columns, the 3 rd row, 1 st to 2 nd columns, the 4 th row, 1 st to 2 nd columns, and the 5 th row, 1 st to 2 nd columns of the target dimming matrix 221. Accordingly, in the target dimming matrix 221, the backlight luminance of the target backlight partition 211 is adjusted according to the first backlight values and backlight coefficients of the adjacent auxiliary backlight partitions 212 and virtual backlight partitions 213. Thus, the backlight partitions 210 of the edge portion in the backlight module 200B are sequentially used as the target backlight partitions 211, and the backlight luminance of the backlight partitions 210 of the edge portion in the backlight module 200B is sequentially adjusted. Thus, the backlight brightness of the backlight partition 210 at the edge portion in the backlight module 200B is smoothly transited. Thus, the display effect of the display module 200 is greatly improved.
In some alternative embodiments, referring to fig. 3 and 4, the backlight coefficients of the virtual backlight partition 213 are greater than 0, and the sum of the backlight coefficients of the target backlight partition 211, all auxiliary backlight partitions 212, and all virtual backlight partitions 213 in the target dimming matrix 221 is equal to 1.
In the embodiment of the present invention, in the target dimming matrix 221, although the first backlight value of the virtual backlight partition 213 is 0, the backlight coefficient of the virtual backlight partition 213 is greater than 0. That is, P11＝P12＝P13＝P14＝P15＝P21＝P22＝P23＝P24＝P25＝P31＝P32＝P41＝P42＝P51＝P52＝0，C11、C12、C13、C14、C15、C21、C22、C23、C24、C25、C31、C32、C41、C42、C51And C52Are all greater than 0. Since the second backlight value P' of the target backlight partition 211 is calculated by a weighted average method in which the backlight coefficients of the target backlight partition 211, the auxiliary backlight partition 212 or the virtual backlight partition 213 are weighted as their first backlight values, the target backlight partition 211, the auxiliary backlight partition 212 or the virtual backlight partition 213 are weighted,The sum of the backlight coefficients of all auxiliary backlight partitions 212 and all virtual backlight partitions 213 is equal to 1. For example, the target dimming matrix 221 includes 5 rows and 5 columns of backlight partitions 210, i.e., 1 target backlight partition 211, 8 auxiliary backlight partitions 212, and 16 virtual backlight partitions 213. Second backlight value of target backlight partition 211
Accordingly, the target dimming matrix 221 adjusts the backlight value of the target backlight partition 211 using the first backlight value and the backlight coefficient of the target backlight partition 211, the auxiliary backlight partition 212, and the virtual backlight partition 213. Thus, the backlight partitions 210 of the edge portion in the backlight module 200B are sequentially used as the target backlight partitions 211, and the backlight luminance of the backlight partitions 210 of the edge portion in the backlight module 200B is sequentially adjusted. Thus, the backlight brightness of the backlight partition 210 at the edge portion in the backlight module 200B is smoothly transited. Thus, the display effect of the display module 200 is greatly improved.
In some alternative embodiments, referring to fig. 3 and 4, the backlight coefficient of the virtual backlight partition 213 is equal to 0, and the sum of the backlight coefficients of the target backlight partition 211 and all auxiliary backlight partitions 212 in the target dimming matrix 221 is equal to 1.
In the embodiment of the present invention, in the target dimming matrix 221, the first backlight value of the virtual backlight partition 213 is 0, and meanwhile, the backlight coefficient of the virtual backlight partition 213 is equal to 0. That is, P11＝P12＝P13＝P14＝P15＝P21＝P22＝P23＝P24＝P25＝P31＝P32＝P41＝P42＝P51＝P52＝0，C11＝C12＝C13＝C14＝C15＝C21＝C22＝C23＝C24＝C25＝C31＝C32＝C41＝C42＝C51＝C520. Since the second backlight value P' of the target backlight partition 211 is calculated by a weighted average method, in which the backlight coefficients of the target backlight partition 211 and the auxiliary backlight partitions 212 are used as the weighted weights of the first backlight values, the sum of the backlight coefficients of the target backlight partition 211 and all the auxiliary backlight partitions 212 is equal to 1. For example, the target dimming matrix 221 includes 5 rows and 5 columns of backlight partitions 210, i.e., 1 target backlight partition 211, 8 auxiliary backlight partitions 212, and 16 virtual backlight partitions 213. Second backlight value of target backlight partition 211
Accordingly, the target dimming matrix 221 adjusts the backlight value of the target backlight partition 211 using the first backlight value and the backlight coefficient of the target backlight partition 211, the auxiliary backlight partition 212, and the virtual backlight partition 213. Thus, the backlight partitions 210 of the edge portion in the backlight module 200B are sequentially used as the target backlight partitions 211, and the backlight luminance of the backlight partitions 210 of the edge portion in the backlight module 200B is sequentially adjusted. Thus, the backlight brightness of the backlight partition 210 at the edge portion in the backlight module 200B is smoothly transited. Thus, the display effect of the display module 200 is greatly improved.
Fig. 5 is a flowchart illustrating another brightness adjusting method for a display module according to an embodiment of the invention.
In some alternative embodiments, as shown in fig. 5, the brightness adjustment method 100 further includes: before generating the second backlight value P' of the target backlight partition 211 according to the first backlight values of the target backlight partition 211, the auxiliary backlight partition 212 and the virtual backlight partition 213 in the target dimming matrix 221 and the corresponding backlight coefficients, step S155 retrieves the first backlight values of the target backlight partition 211 and the auxiliary backlight partition 212.
In the embodiment of the invention, first, the first backlight value of a single backlight partition 210 in the backlight module 200B is set according to the backlight brightness of a plurality of backlight light sources therein, and the first backlight values of all backlight partitions 210 are set in sequence. Then, one backlight partition 210 and the adjacent plural backlight partitions 210 of the edge portion in the backlight module 200B are used as a target backlight partition 211 and an auxiliary backlight partition 212 in the target dimming matrix 221, respectively. Then, the target dimming matrix 221 tunes first backlight values of the target backlight partition 211 and the auxiliary backlight partition 212, and sets backlight coefficients of the target backlight partition 211 and the auxiliary backlight partition 212. Then, the target dimming matrix 221 sets the first backlight value and the backlight coefficient of the virtual backlight partition 213. Accordingly, the target dimming matrix 221 adjusts the backlight value of the target backlight partition 211 using the first backlight value and the backlight coefficient of the target backlight partition 211, the auxiliary backlight partition 212, and the virtual backlight partition 213. Thus, the backlight partitions 210 of the edge portion in the backlight module 200B are sequentially used as the target backlight partitions 211, and the backlight luminance of the backlight partitions 210 of the edge portion in the backlight module 200B is sequentially adjusted. Thus, the backlight brightness of the backlight partition 210 at the edge portion in the backlight module 200B is smoothly transited. Thus, the display effect of the display module 200 is greatly improved.
As shown in fig. 4, the brightness adjustment method 100 further includes: after generating the second backlight values P' of the target backlight partition 211 according to the first backlight values of the target backlight partition 211, the auxiliary backlight partition 212 and the virtual backlight partition 213 in the target dimming matrix 221 and the corresponding backlight coefficients,
in step S165, the second backlight value P' of the target backlight partition 211 is stored.
In the embodiment of the present invention, the target dimming matrix 221 generates the second backlight value P 'of the target backlight partition 211 according to the first backlight values of the target backlight partition 211, the auxiliary backlight partition 212 and the virtual backlight partition 213 and the corresponding backlight coefficients, and the backlight module 200B then stores the second backlight value P' of the target backlight partition 211. For example, the target dimming matrix 221 is provided with 5 rows and 5 columns of the backlight partition 210. Then, the backlight partitions 210 of the 1 st row, 1 st to 2 nd columns and the 2 nd row, 1 st to 2 nd columns in the backlight module 200B are sequentially used as the target backlight partitions 211 of the target dimming matrix 221. Then, the target dimming matrix 221 sequentially generates the second backlight values P' of the backlight partitions 210 in the backlight module 200B, i.e., the 1 st row, the 1 st column, the 2 nd column, and the 2 nd row, the 1 st column, and the 2 nd column. Then, the display module 200 sequentially stores the second backlight value P' of the backlight partition 210 in the 1 st row, 1 st to 2 nd column and the 2 nd row, 1 st to 2 nd column. Then, the backlight brightness of the backlight partition 210 in the 1 st row, 1 st to 2 nd column and the 2 nd row, 1 st to 2 nd column in the backlight module 200B is sequentially adjusted. Thus, the backlight brightness of the backlight partition 210 at the edge portion in the backlight module 200B is smoothly transited. Thus, the display effect of the display module 200 is greatly improved.
In some alternative embodiments, with continued reference to fig. 3 and 4, the second backlight values P' of all backlight partitions 210 in the backlight module 200B are sequentially generated.
In the embodiment of the invention, the second backlight values of all the backlight partitions 210 in the backlight module 200B are sequentially generated. Wherein, the second backlight values of the backlight partitions 210 at the edge of the backlight module 200B are sequentially generated. Meanwhile, the second backlight values of the backlight partitions 210 in the non-edge portion of the backlight module 200B are sequentially generated. Then, the backlight brightness of all the backlight partitions 210 in the backlight module 200B is adjusted in sequence. Thus, the backlight brightness of all backlight partitions 210 in the backlight module 200B is smoothly transited. Thus, the display effect of 200 is greatly improved.
FIG. 6 is a schematic flow chart illustrating a brightness adjustment method for a display module according to another embodiment of the present invention; FIG. 7 is a schematic structural diagram of a backlight module in another display module according to an embodiment of the invention; fig. 8 is a schematic diagram of a target dimming matrix in another brightness adjustment method of a display module according to an embodiment of the invention.
As shown in fig. 6 to 8, the brightness adjustment method 100 further includes:
step S181, determining a target backlight partition 211 needing dimming, wherein the target backlight partition 211 is located in the d-th column of the c-th row, and c- (e-1)/2 is more than or equal to 1, d- (f-1)/2 is more than or equal to 1, a-c is more than or equal to (e-1)/2, or b-d is more than or equal to (f-1)/2;
step S182, determining a plurality of auxiliary dimming auxiliary backsA light partition 212, and an auxiliary backlight partition 212 at the g-th position2Line h2Column, - (e +1)/2 < c-g2< (e +1)/2 and- (f +1)/2 < d-h2＜(f+1)/2，g2≤a，h2≤b，g2≠c，h2≠d，g2And h2Is a positive integer;
step S183, determining a target dimming matrix 221, where the target dimming matrix 221 includes a target backlight partition 211 and an auxiliary backlight partition 212;
step S184, generating a second backlight value P' of the target backlight partition 211 according to the first backlight values and the corresponding backlight coefficients of the target backlight partition 211 and the auxiliary backlight partition 212 in the target dimming matrix 221;
in step S185, the backlight brightness of the target backlight partition 211 is set according to the second backlight value P'.
In the embodiment of the present invention, the target backlight partition 211 requiring dimming is first determined. For example, the target backlight partition 211 is located at row 4 and column 4 of the backlight module 200B. A plurality of auxiliary dimmed auxiliary backlight partitions 212 are determined next. For example, the auxiliary backlight partition 212 is located in the 2 nd row, 2 nd to 6 th column, 3 rd row, 2 nd to 6 th column, 4 th row, 2 nd to 3 rd column, 4 th row, 5 th to 6 th column, 5 th row, 2 nd to 6 th column and 6 th row, 2 nd to 6 th column of the backlight module 200B. The target dimming matrix 221 is determined next. For example, the target dimming matrix 221 includes 5 rows and 5 columns of backlight partitions 210, i.e., 1 target backlight partition 211 and 24 auxiliary backlight partitions 212. Second, a second backlight value P' of the target backlight partition 211 is generated according to the first backlight values of the target backlight partition 211 and the auxiliary backlight partition 212 in the target dimming matrix 221 and the corresponding backlight coefficients. For example, the second backlight value of the target backlight partition 211
Finally, the backlight brightness of the target backlight partition 211 is set according to the second backlight value P'. Thus, the plurality of backlight partitions 210 of the non-edge portion of the backlight module 200B are sequentially used as targetsThe backlight partitions 211 and their backlight brightness are sequentially adjusted. Here, the target dimming matrix 221 is filled using the target backlight partition 211 and the auxiliary backlight partition 212, and the target dimming matrix 221 is not filled using the virtual backlight partition 213. Thus, the backlight brightness of the backlight partition 210 of the non-edge portion in the backlight module 200B is smoothly transited. Thus, the display effect of the display module 200 is greatly improved.
Fig. 9 is a schematic structural diagram of a display device according to an embodiment of the invention.
As shown in fig. 1 and 9, the display device 300 performs display according to the brightness adjustment method 100. .
In the embodiment of the invention, the display device 300 includes the display module 200. The display device 300 performs display according to the brightness adjustment method 100. Wherein the first backlight value of the single backlight partition 210 is set according to the backlight brightness of the plurality of backlight light sources therein. However, at the edge portion of the backlight module 200B, the first backlight value of the target backlight partition 211 is not smoothly transited from the first backlight value of the adjacent backlight partition 210. Thus, the backlight brightness of the target backlight partition 211 needs to be adjusted without taking its first backlight value. To this end, the target backlight partition 211, the auxiliary backlight partition, and the virtual backlight partition 213 serve as the backlight partition 210 of the target dimming matrix 221. Accordingly, all backlight partitions 210 of the target dimming matrix 221 are provided with the first backlight value and the backlight coefficient. Wherein the virtual backlight partition 213 does not emit backlight, the first backlight value of the virtual backlight partition 213 is 0. Accordingly, the target dimming matrix 221 generates the second backlight value P' of the target backlight partition 211 using the first backlight values of the target backlight partition 211, the auxiliary backlight partition 212, and the virtual backlight partition 213 and the corresponding backlight coefficients. Thereby, the plurality of backlight partitions 210 of the edge portion in the backlight module 200B are sequentially used as the target backlight partition 211 and their backlight luminance is sequentially adjusted. Here, the target dimming matrix 221 is filled with the virtual backlight partition 213, so as to avoid that the target backlight partition 211 and the auxiliary backlight partition 212 cannot fill the target dimming matrix 221. Meanwhile, the first backlight value of the virtual backlight partition 213 is 0, and the first backlight value of the virtual backlight partition 213 reflects its backlight brightness. Thus, the backlight brightness of the backlight partition 210 at the edge portion in the backlight module 200B is smoothly transited. Thus, the display effect of the display device 300 is greatly improved.
It should be noted that the display device may be an electronic display device such as a vehicle-mounted display screen, a mobile phone, a computer, or a television, which is not limited in this application.
In summary, the present invention provides a brightness adjusting method for a display module and a display device. The display module comprises a display panel and a backlight module, and the brightness adjusting method is used for adjusting the brightness of the backlight module; the backlight module comprises a multiplied by b backlight partitions, the backlight partitions have a first backlight numerical value and a backlight coefficient, and a and b are positive integers; the brightness adjusting method comprises the following steps: determining the number of rows and columns of the dimming matrix; determining a target backlight partition needing dimming; determining an auxiliary backlight partition for a plurality of auxiliary dimmings; establishing a plurality of virtual backlight partitions; determining a target dimming matrix; generating a second backlight numerical value P' of the target backlight partition according to the first backlight numerical values and corresponding backlight coefficients of the target backlight partition, the auxiliary backlight partition and the virtual backlight partition in the target dimming matrix; and setting the backlight brightness of the target backlight subarea according to the second backlight numerical value P'. In the invention, the backlight brightness of the backlight subareas at the edge part in the backlight module is smoothly transited.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The method for adjusting the brightness of the display module is characterized in that the display module comprises a display panel and a backlight module, and the brightness adjusting method is used for adjusting the brightness of the backlight module;
the backlight module comprises a multiplied by b backlight partitions, the backlight partitions have a first backlight numerical value and a backlight coefficient, and a and b are positive integers;
the brightness adjusting method comprises the following steps:
determining the number of rows and the number of columns of a dimming matrix, wherein the dimming matrix comprises e rows and f columns of the backlight subareas, a is more than or equal to e, b is more than or equal to f, and e and f are odd numbers;
determining a target backlight partition needing dimming, wherein the target backlight partition is positioned in the d column of the c row, c- (e-1)/2 < 1 or d- (f-1)/2 < 1 or a-c < (e-1)/2 or b-d < (f-1)/2, c is less than a, d is less than b, and c and d are positive integers;
determining a plurality of auxiliary backlight partitions for auxiliary dimming, the auxiliary backlight partitions located at g1Line h1Column, - (e +1)/2 < c-g1< (e +1)/2 and- (f +1)/2 < d-h1＜(f+1)/2，g1≤a，h1≤b，g1≠c，h1≠d，g1And h1Is a positive integer;
establishing a plurality of virtual backlight partitions, wherein each virtual backlight partition has the first backlight value and the backlight coefficient, and the first backlight value of each virtual backlight partition is 0;
determining a target dimming matrix, the target dimming matrix comprising the target backlight partition, the auxiliary backlight partition, and the virtual backlight partition, the auxiliary backlight partition and the virtual backlight partition surrounding the target backlight partition;
generating a second backlight numerical value P' of the target backlight partition according to the first backlight numerical values of the target backlight partition, the auxiliary backlight partition and the virtual backlight partition in the target dimming matrix and the corresponding backlight coefficients;
setting the backlight brightness of the target backlight partition according to the second backlight numerical value P';
wherein the content of the first and second substances,
Pijis the first backlight value of the target backlight partition, the auxiliary backlight partition or the virtual backlight partition in the ith row and jth column of the target dimming matrix, CijIs the backlight coefficient, C 'of the target backlight partition, the auxiliary backlight partition or the virtual backlight partition of the ith row and jth column in the target dimming matrix'Is the sum of the backlight coefficients of the target backlight partition and all the auxiliary backlight partitions in the target dimming matrix, i is less than or equal to e, j is less than or equal to f, and i and j are positive integers.
2. The method of claim 1, wherein the target backlight partition is located at (e +1)/2 rows and (f +1)/2 columns in the target dimming matrix.
3. The method according to claim 1, wherein the backlight coefficients of the virtual backlight partition are greater than 0, and the sum of the backlight coefficients of the target backlight partition, all the auxiliary backlight partitions, and all the virtual backlight partitions in the target dimming matrix is equal to 1.
4. The method according to claim 1, wherein the backlight coefficients of the virtual backlight partition are equal to 0, and the sum of the backlight coefficients of the target backlight partition and all the auxiliary backlight partitions in the target dimming matrix is equal to 1.
5. The luminance adjustment method according to claim 1, further comprising:
before generating a second backlight value P' of the target backlight partition from the first backlight values of the target backlight partition, the auxiliary backlight partition and the virtual backlight partition in the target dimming matrix and the corresponding backlight coefficients,
the first backlight values of the target backlight partition and the auxiliary backlight partition are retrieved.
6. The luminance adjustment method according to claim 1, further comprising:
after generating a second backlight value P' of the target backlight partition according to the first backlight values of the target backlight partition, the auxiliary backlight partition and the virtual backlight partition in the target dimming matrix and the corresponding backlight coefficients,
storing a second backlight value P' for the target backlight partition.
7. The method according to claim 1, wherein the second backlight values P' of all backlight partitions in the backlight module are sequentially generated.
8. The method for adjusting the brightness of the display module is characterized in that the display module comprises a display panel and a backlight module, and the brightness adjusting method is used for adjusting the brightness of the backlight module;
the backlight module comprises a multiplied by b backlight partitions, the backlight partitions have a first backlight numerical value and a backlight coefficient, and a and b are positive integers;
the brightness adjusting method comprises the following steps:
determining the number of rows and the number of columns of a dimming matrix, wherein the dimming matrix comprises e rows and f columns of the backlight subareas, a is more than or equal to e, b is more than or equal to f, and e and f are odd numbers;
determining a target backlight partition needing dimming, wherein the target backlight partition is positioned in the d column of the c row, and c- (e-1)/2 is more than or equal to 1, d- (f-1)/2 is more than or equal to 1, a-c is more than or equal to (e-1)/2, or b-d is more than or equal to (f-1)/2;
determining a plurality of auxiliary backlight partitions for auxiliary dimming, the auxiliary backlight partitions located at g2Line h2Column, - (e +1)/2 < c-g2< (e +1)/2 and- (f +1)/2 < d-h2＜(f+1)/2，g2≤a，h2≤b，g2≠c，h2≠d，g2And h2Is a positive integer;
establishing a plurality of virtual backlight partitions, wherein each virtual backlight partition has the first backlight value and the backlight coefficient, and the first backlight value of each virtual backlight partition is 0;
determining a target dimming matrix, the target dimming matrix comprising the target backlight partition and the auxiliary backlight partition, the auxiliary backlight partition and the virtual backlight partition surrounding the target backlight partition;
generating a second backlight numerical value P' of the target backlight partition according to the first backlight numerical values of the target backlight partition and the auxiliary backlight partition in the target dimming matrix and the corresponding backlight coefficients;
setting the backlight brightness of the target backlight partition according to the second backlight numerical value P';
wherein the content of the first and second substances,
Pijis the first backlight value of the target backlight partition, the auxiliary backlight partition or the virtual backlight partition in the ith row and jth column of the target dimming matrix, CijIs the backlight coefficient of the ith row and jth column of the target backlight partition, the auxiliary backlight partition or the virtual backlight partition in the target dimming matrix, C' is the sum of the backlight coefficients of the target backlight partition and all the auxiliary backlight partitions in the target dimming matrix, i is not less than e, j is not less than f, and i and j are positive integers.
9. A display device, wherein the display device performs display according to the luminance adjustment method according to any one of claims 1 to 8.
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