CN110021271B - Optical compensation method, optical compensation system, display method and display device - Google Patents
Optical compensation method, optical compensation system, display method and display device Download PDFInfo
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- CN110021271B CN110021271B CN201910435322.1A CN201910435322A CN110021271B CN 110021271 B CN110021271 B CN 110021271B CN 201910435322 A CN201910435322 A CN 201910435322A CN 110021271 B CN110021271 B CN 110021271B
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The invention provides an optical compensation method, an optical compensation system, a display method and a display device, wherein the optical compensation method is applied to the display device, the display device comprises a plurality of sub-display areas, and the method comprises the following steps: acquiring an input gray scale to be compensated; aiming at each sub-display area, obtaining a stored compensation parameter value of the sub-display area under the gray scale to be compensated, wherein the compensation parameter value comprises an offset compensation value; if the gray scale to be compensated is less than or equal to the designated gray scale threshold, reducing the obtained offset compensation value, taking the reduced offset compensation value as an offset compensation value for compensation, and if the gray scale to be compensated is greater than the designated gray scale threshold, taking the obtained offset compensation value as an offset compensation value for compensation; compensating the gray scale to be compensated by adopting the offset compensation value for compensation to obtain the compensated gray scale of the sub-display area; and storing the corresponding relation between the gray scale to be compensated and the compensated gray scale of each sub-display area. The invention can avoid the problem of low gray scale over-compensation.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an optical compensation method, an optical compensation system, a display method, and a display device.
Background
Organic Light Emitting Diode (OLED) display devices have many advantages of high contrast, ultra-light and thinness, flexibility, etc., and have been increasingly used, but the problem of uneven brightness (mura) remains a problem.
The problem of uneven brightness can be solved by an optical compensation method in the prior art. The optical compensation method is to photograph the whole display panel by a camera to obtain the brightness value of each pixel under the gray scale to be compensated, and then to calculate the compensation parameters of the gray scale to be compensated according to the collected brightness value.
One related optical compensation method performs optical compensation by using an optical compensation function Y ═ a × X + b, where Y is a compensated gray scale, X is an input gray scale to be compensated, a is a gain compensation value, and b is an offset compensation value.
However, the above optical compensation method may have a problem of low gray level overcompletion in practical application, when the value of b is too large, for example, b is 8, which may result in an overcompletion of a dark state (black) mura area, for example, 8 gray levels after 0 gray level compensation, which may result in a dark state not being dark, and affect the display effect.
Disclosure of Invention
In view of the above, the present invention provides an optical compensation method, an optical compensation system, a display method and a display device, which are used to solve the problem of low gray scale overcompletion existing in the conventional optical compensation method.
In order to solve the above technical problem, the present invention provides an optical compensation method applied to a display device, the display device including a plurality of sub-display regions, the method including:
acquiring an input gray scale to be compensated;
for each sub-display area, obtaining a stored compensation parameter value of the sub-display area under the gray scale to be compensated, wherein the compensation parameter value comprises an offset compensation value;
if the gray scale to be compensated is less than or equal to a designated gray scale threshold, reducing the obtained offset compensation value, taking the reduced offset compensation value as an offset compensation value for compensation, and if the gray scale to be compensated is greater than the designated gray scale threshold, taking the obtained offset compensation value as an offset compensation value for compensation;
compensating the gray scale to be compensated by adopting the offset compensation value for compensation to obtain a compensated gray scale of the sub-display area;
and storing the corresponding relation between the gray scale to be compensated and the compensated gray scale of each sub-display area.
Optionally, the designated gray level threshold is 64 gray levels.
Optionally, the reduced offset compensation value is one half of the obtained offset compensation value.
Optionally, the compensation parameter value further includes a gain compensation value;
and storing the gain compensation value and the offset compensation value of each sub-display area under the gray scale to be compensated by adopting the same byte, wherein the gain compensation value occupies 6 bits, and the offset compensation value occupies 2 bits.
Optionally, the compensating the to-be-compensated gray scale by using the offset compensation value for compensation to obtain the compensated gray scale of the sub-display area includes:
if the mura type of the sub-display area is dark-state mura, compensating the gray scale to be compensated by adopting Y ═ a × X + b to obtain a compensated gray scale of the sub-display area;
if the mura type of the sub-display area is bright-state mura, compensating the gray scale to be compensated by adopting Y ═ 1-a × X + b to obtain a compensated gray scale of the sub-display area;
wherein, Y is the compensated gray scale, X is the gray scale to be compensated, a is the obtained gain compensation value, and b is the offset compensation value for compensation.
Optionally, if the mura type of the sub-display area is a dark-state mura, a value range is as follows: 1< a <1.3, and the value range of b is: b is more than or equal to 0;
if the mura type of the sub-display area is bright-state mura, the value range of a is as follows: 0.3< a <1, and the value range of b is: b <0.
Optionally, the obtaining, for each of the sub-display regions, a stored compensation parameter value of the sub-display region further includes:
inputting the gray scale to be compensated to the display device;
acquiring brightness data of the display device by adopting a camera;
and calculating and storing a compensation parameter value of each sub-display area under the gray scale to be compensated according to the brightness data, and determining the mura type of each sub-display area according to the brightness data.
The present invention also provides an optical compensation system applied to a display device including a plurality of sub-display regions, the optical compensation system including:
the first acquisition module is used for acquiring an input gray scale to be compensated;
a second obtaining module, configured to obtain, for each sub-display region, a stored compensation parameter value of the sub-display region in the to-be-compensated gray scale, where the compensation parameter value includes an offset compensation value;
the processing module is used for reducing the obtained offset compensation value if the gray scale to be compensated is less than or equal to a specified gray scale threshold value, taking the reduced offset compensation value as an offset compensation value for compensation, and taking the obtained offset compensation value as an offset compensation value for compensation if the gray scale to be compensated is greater than the specified gray scale threshold value;
the compensation module is used for compensating the gray scale to be compensated by adopting the offset compensation value for compensation to obtain a compensated gray scale of the sub-display area;
and the storage module is used for storing the corresponding relation between the gray scale to be compensated and the compensated gray scale of each sub-display area.
The invention also provides a display method, which is applied to a display device, wherein the display device comprises a plurality of sub-display areas, and the display method comprises the following steps:
acquiring a target gray scale to be compensated to be input into the sub-display area;
acquiring a target compensated gray scale corresponding to the target gray scale to be compensated according to the corresponding relation between the stored gray scale to be compensated and the compensated gray scale;
outputting the target compensated gray scale to the sub-display area;
wherein the corresponding relation is obtained by the optical compensation method.
The present invention also provides a display device including a plurality of sub-display regions, the display device further including:
the first acquisition module is used for acquiring a target gray scale to be compensated to be input into the sub-display area;
the second acquisition module is used for acquiring a target compensated gray scale corresponding to the target gray scale to be compensated according to the corresponding relation between the stored gray scale to be compensated and the compensated gray scale;
the output module is used for outputting the target compensated gray scale to the sub-display area;
wherein the corresponding relation is obtained by the optical compensation method.
The technical scheme of the invention has the following beneficial effects:
in the embodiment of the invention, when the gray scale to be compensated is the low gray scale, the offset compensation value for compensating the optical compensation function is reduced, the problem of over compensation of the low gray scale is avoided, and the display effect is improved.
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 description of the embodiments of the present invention will be briefly introduced 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 that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a flow chart illustrating an optical compensation method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a method for storing compensation parameter values according to an embodiment of the present invention;
FIGS. 3 and 4 are schematic diagrams illustrating a method for storing a compensation parameter value according to another embodiment of the present invention;
FIG. 5 is a diagram illustrating a method for calculating an optical compensation function according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a method for calculating an optical compensation function according to another embodiment of the present invention;
FIG. 7 is a flowchart illustrating an optical compensation method according to another embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an optical compensation system according to an embodiment of the present invention;
FIG. 9 is a flowchart illustrating a display method according to an embodiment of the invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of an optical compensation method according to an embodiment of the present invention, the optical compensation method is applied to a display device, the display device includes a plurality of sub-display regions, and the optical compensation method includes:
step 11: acquiring an input gray scale to be compensated;
in some embodiments of the present invention, the gray level to be compensated may be some designated gray levels, such as 0 gray level, 32 gray level, 64 gray level, etc.
Step 12: for each sub-display area, obtaining a stored compensation parameter value of the sub-display area under the gray scale to be compensated, wherein the compensation parameter value comprises an offset compensation value;
in the embodiment of the present invention, the display area of the display device may be divided into a plurality of sub-display areas, each of the sub-display areas has an equal size, for example, the resolution of the display area is 1080 × 2048, and the display area may be divided into a plurality of sub-display areas, each of which is a 4 × 4 small block.
In the embodiment of the present invention, the compensation parameter values of each sub-display region under a plurality of gray scales to be compensated can be stored, as shown in table 1:
TABLE 1
As can be seen from Table 1, each of the sub-display regions corresponds to a set of compensation parameter values under a gray scale to be compensated.
In the embodiment of the invention, the stored gray scales to be compensated are located in the gray scale range which can be displayed by the display device, for example, the gray scale range which can be displayed by the display device is 0-255, and the gray scales to be compensated are all located in the gray scale range of 0-255. The gray scales to be compensated can be set as required, and can be, for example, a plurality of gray scales distributed at equal intervals in a gray scale range of 0 to 255, such as 0 gray scale, 32 gray scale, 64 gray scale … …, and the like.
Step 13: if the gray scale to be compensated is less than or equal to a designated gray scale threshold, reducing the obtained offset compensation value, taking the reduced offset compensation value as an offset compensation value for compensation, and if the gray scale to be compensated is greater than the designated gray scale threshold, taking the obtained offset compensation value as an offset compensation value for compensation;
the designated gray level threshold may be set as required, and is used to determine whether the gray level to be compensated is a low gray level or a medium-high gray level, for example, the designated gray level threshold may be 64.
In the embodiment of the present invention, in order to avoid the low gray level overcomplete, the offset compensation value used by the optical compensation function may be reduced, for example, the offset compensation value is reduced to one half of the stored offset compensation value. However, for medium and high gray levels, there is no overcompletion problem, and thus there is no need to change the stored offset compensation value.
Step 14: compensating the gray scale to be compensated by adopting the offset compensation value for compensation to obtain a compensated gray scale of the sub-display area;
step 15: and storing the corresponding relation between the gray scale to be compensated and the compensated gray scale of each sub-display area.
In the embodiment of the present invention, the stored corresponding relationship between the gray scale to be compensated and the compensated gray scale of each sub-display area may be as shown in table 2:
TABLE 2
In the embodiment of the present invention, the stored corresponding relationship between the gray scale to be compensated and the compensated gray scale of each sub-display area is used for subsequent display of the display device, for example, when the gray scale to be displayed in one sub-display area 1 of the display device is 32, the gray scale to be displayed needs to be compensated to 33 and then displayed.
In the embodiment of the invention, when the gray scale to be compensated is the low gray scale, the offset compensation value for compensating the optical compensation function is reduced, the problem of over compensation of the low gray scale is avoided, and the display effect is improved.
In an embodiment of the present invention, an optical compensation function Y ═ a × X + b may be used to perform optical compensation, where Y is a compensated gray scale, X is a gray scale to be compensated, a is a gain compensation value, and b is an offset compensation value.
That is, the compensation parameter value may include a gain compensation value in addition to the offset compensation value.
As can be seen from table 1, it is necessary to store the gain compensation value and the offset compensation value for each sub display region at each gray scale to be compensated.
In some embodiments of the present invention, for the gain compensation value and the offset compensation value of a sub-display region under a gray scale to be compensated, two bytes may be used to store the gain compensation value and the offset compensation value, respectively, where one byte is 8 bits (bit) and two bytes are 16 bits, that is, the gain compensation value and the offset compensation value of a sub-display region under a gray scale to be compensated need to occupy a storage space of 16 bits, please refer to fig. 2.
In the above storage manner, since one gain compensation value and one offset compensation value need to be stored by using one byte, a large amount of storage space needs to be occupied.
In order to reduce the storage space for storing the gain compensation value and the offset compensation value, in the embodiment of the present invention, optionally, the gain compensation value and the offset compensation value of one of the sub display regions under the gray scale to be compensated are stored by using the same byte, and how to store the gain compensation value and the offset compensation value in the same byte will be described in detail below.
As can be seen from the optical compensation function Y ═ a × X + b, when the mura type of the sub-display region is dark state mura, since the compensation purpose is to brighten the sub-display region, that is, Y needs to be greater than X, the value ranges of a and b are: a is greater than 1, and b is greater than or equal to 0. In addition, when a is equal to 1.3 and the gray scale to be compensated is about 190, the compensated gray scale is the highest gray scale, so that the overcompletion problem occurs, and therefore, the value range of a should be smaller than 1.3, that is, the value range of a is: 1< a < 1.3. Since the compensated gray scale Y is b when the gray scale X to be compensated is 0, b cannot be too large, otherwise the dark state after the low gray scale compensation is not dark.
In the embodiment of the invention, when the mura type of the sub-display area is dark-state mura, the integer bits of a can be stored by using 1 bit, the decimal bits can be stored by using 5 bits, and the b can not be too large and can be stored by using 2 bits. That is, the gain compensation value occupies 6 bits, and the offset compensation value occupies 2 bits.
As can be seen from the optical compensation function Y ═ a × X + b, when the mura type of the sub-display region is bright state mura, since the purpose of compensation is to darken the sub-display region, that is, Y needs to be smaller than X, the value ranges of a and b are: a <1, b <0. In addition, in order to avoid the low brightness after compensation, the value of a needs to be larger than 0.7, that is, the value range of a is 0.7< a <1.
When the mura type of the sub-display area is bright-state mura, b can be stored by using 2 bits, an integer bit of a is 0 and can be stored by using 1 bit, and a decimal bit is greater than 0.7, the integer bit cannot be stored by using 5 bits, and since the value of 1-a is less than 0.3 and can be stored by using 5 bits, in the embodiment of the invention, the value of 1-a can be stored, and meanwhile, the gray scale to be compensated is compensated by using Y ═ X + b.
That is, in the embodiment of the present invention, the gain compensation value may be stored in the lower 6 bits of one byte, and the offset compensation value may be stored in the upper 2 bits, or the gain compensation value may be stored in the upper 6 bits, and the offset compensation value may be stored in the lower 2 bits, please refer to fig. 3 and fig. 4.
In the optical compensation, referring to fig. 5, if the mura type of the sub-display area is dark-state mura, the lower 6 bits (a) of the compensation parameter value of the sub-display area stored in the storage module may be multiplied by the input gray scale to be compensated, and then added with the upper 2 bits (b) to obtain the compensated gray scale. Referring to fig. 6, if the mura type of the sub-display area is bright-state mura, the lower 6 bits (a) may be subtracted from 1, then multiplied by the input gray scale to be compensated, and then added to the upper 2 bits (b) to obtain the compensated gray scale.
The dark-state mura and the bright-state mura are explained below, where when the output gray scale calculated according to the brightness data of the sub-display area acquired by the camera is smaller than the real target gray scale to be compensated, the mura type of the sub-display area is the dark-state mura, and when the output gray scale calculated according to the brightness data of the sub-display area acquired by the camera is larger than the real target gray scale to be compensated, the mura type of the sub-display area is the bright-state mura.
Referring to fig. 7, fig. 7 is a schematic flowchart illustrating an optical compensation method according to another embodiment of the present invention, the optical compensation method includes:
step 21: inputting a gray scale to be compensated to a display device;
step 22: acquiring brightness data of the display device by adopting a camera;
step 23: and calculating and storing a compensation parameter value of each sub-display area under the gray scale to be compensated according to the brightness data, and determining the mura type of each sub-display area according to the brightness data.
In the embodiment of the invention, during storage, the offset compensation value and the gain compensation value of the next sub-display area of the gray scale to be compensated are stored into the same byte, if the mura type of the sub-display area is dark state mura, the gain compensation value is stored to the lower 6 bits, the offset compensation value is stored to the upper 2 bits, if the mura type of the sub-display area is dark state mura, the difference value between 1 and the gain compensation value is stored to the lower 6 bits as a new gain compensation value, and the offset compensation value is stored to the upper 2 bits.
In the embodiment of the invention, the offset compensation value and the gain compensation value can be stored in a flash storage device.
Step 24: reading the stored compensation parameter values and the mura type of each of the sub-display areas.
In the embodiment of the present invention, the compensation parameter value may be read from the flash memory device into an IC RAM of a DDIC (display driver integrated circuit) of the display apparatus.
Step 25: acquiring an input gray scale to be compensated, and judging whether the gray scale to be compensated is less than or equal to a specified gray scale threshold value;
step 26: if the gray scale to be compensated is less than or equal to the designated gray scale threshold value, reducing the obtained offset compensation value, and taking the reduced offset compensation value as an offset compensation value for compensation;
step 27: if the gray scale to be compensated is larger than the designated gray scale threshold value, taking the obtained offset compensation value as an offset compensation value for compensation;
step 28: judging the mura type of the sub-display area;
step 29: if the mura type of the sub-display area is dark-state mura, compensating the gray scale to be compensated by adopting an optical compensation function Y ═ a × X + b to obtain a compensated gray scale;
step 210: and if the mura type of the sub-display area is bright-state mura, compensating the gray scale to be compensated by adopting an optical compensation function Y ═ 1-a × X + b to obtain the compensated gray scale.
In the embodiment of the invention, the input low gray scale and the input medium and high gray scale are processed in a segmented manner, so that the phenomenon of low gray scale over-compensation is effectively avoided, and the gain compensation value and the offset compensation value of the same sub-display area under the gray scale to be compensated are stored in the same byte, so that the storage capacity of the compensation parameter value is reduced, and the storage cost is reduced.
Referring to fig. 8, based on the same inventive concept, an embodiment of the present invention further provides an optical compensation system applied to a display device, where the display device includes a plurality of sub-display regions, and the optical compensation system includes:
the first acquisition module is used for acquiring an input gray scale to be compensated;
a second obtaining module, configured to obtain, for each sub-display region, a stored compensation parameter value of the sub-display region in the to-be-compensated gray scale, where the compensation parameter value includes an offset compensation value;
the processing module is used for reducing the obtained offset compensation value if the gray scale to be compensated is less than or equal to a specified gray scale threshold value, taking the reduced offset compensation value as an offset compensation value for compensation, and taking the obtained offset compensation value as an offset compensation value for compensation if the gray scale to be compensated is greater than the specified gray scale threshold value;
the compensation module is used for compensating the gray scale to be compensated by adopting the offset compensation value for compensation to obtain a compensated gray scale of the sub-display area;
and the storage module is used for storing the corresponding relation between the gray scale to be compensated and the compensated gray scale of each sub-display area.
In the embodiment of the invention, when the gray scale to be compensated is the low gray scale, the offset compensation value for compensating the optical compensation function is reduced, the problem of over compensation of the low gray scale is avoided, and the display effect is improved.
Optionally, the designated gray level threshold is 64 gray levels.
Optionally, the reduced offset compensation value is one half of the obtained offset compensation value.
Optionally, the compensation parameter value further includes a gain compensation value;
and storing the gain compensation value and the offset compensation value of each sub-display area under the gray scale to be compensated by adopting the same byte, wherein the gain compensation value occupies 6 bits, and the offset compensation value occupies 2 bits.
Optionally, the compensation module is configured to, if the mura type of the sub-display area is a dark-state mura, compensate the to-be-compensated gray scale by using Y ═ a × X + b, to obtain a compensated gray scale of the sub-display area; if the mura type of the sub-display area is bright-state mura, compensating the gray scale to be compensated by adopting Y ═ 1-a × X + b to obtain a compensated gray scale of the sub-display area;
wherein, Y is the compensated gray scale, X is the gray scale to be compensated, b is the offset compensation value for compensation, and a is the obtained gain compensation value.
Optionally, if the mura type of the sub-display area is a dark-state mura, a value range is as follows: 1< a <1.3, and the value range of b is: b is more than or equal to 0; if the mura type of the sub-display area is bright-state mura, the value range of a is as follows: 0.3< a <1, and the value range of b is: b <0.
Optionally, the optical compensation system further includes:
the input module is used for inputting the gray scale to be compensated to the display device;
the acquisition module is used for acquiring the brightness data of the display device;
and the calculating module is used for calculating and storing a compensation parameter value of each sub-display area under the gray scale to be compensated according to the brightness data, and determining the mura type of each sub-display area according to the brightness data.
Referring to fig. 9, the present invention further provides a display method applied to a display device, where the display device includes a plurality of sub-display regions, and the display method includes:
step 31: acquiring a target gray scale to be compensated to be input into the sub-display area;
step 32: acquiring a target compensated gray scale corresponding to the target gray scale to be compensated according to the corresponding relation between the stored gray scale to be compensated and the compensated gray scale;
step 33: outputting the target compensated gray scale to the sub-display area;
wherein the corresponding relation is obtained by the optical compensation method.
Referring to fig. 10, the present invention further provides a display device, wherein the display device includes a plurality of sub-display regions, and the display device further includes:
the first acquisition module is used for acquiring a target gray scale to be compensated to be input into the sub-display area;
the second acquisition module is used for acquiring a target compensated gray scale corresponding to the target gray scale to be compensated according to the corresponding relation between the stored gray scale to be compensated and the compensated gray scale;
the output module is used for outputting the target compensated gray scale to the sub-display area;
wherein the corresponding relation is obtained by the optical compensation method.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An optical compensation method applied to a display device including a plurality of sub-display regions, the method comprising:
acquiring an input gray scale to be compensated;
for each sub-display area, obtaining a stored compensation parameter value of the sub-display area under the gray scale to be compensated, wherein the compensation parameter value comprises an offset compensation value;
if the gray scale to be compensated is less than or equal to a designated gray scale threshold, reducing the obtained offset compensation value, taking the reduced offset compensation value as an offset compensation value for compensation, and if the gray scale to be compensated is greater than the designated gray scale threshold, taking the obtained offset compensation value as an offset compensation value for compensation;
compensating the gray scale to be compensated by adopting the offset compensation value for compensation to obtain a compensated gray scale of the sub-display area;
storing the corresponding relation between the gray scale to be compensated and the compensated gray scale of each sub-display area;
the compensation parameter values further comprise gain compensation values;
the gain compensation value and the offset compensation value of each sub-display area under the gray scale to be compensated are stored by adopting the same byte, the gain compensation value occupies 6 bits, and the offset compensation value occupies 2 bits;
the compensating the gray scale to be compensated by using the offset compensation value for compensation to obtain the compensated gray scale of the sub-display area comprises:
if the mura type of the sub-display area is dark-state mura, compensating the gray scale to be compensated by adopting Y ═ a × X + b to obtain a compensated gray scale of the sub-display area;
if the mura type of the sub-display area is bright-state mura, compensating the gray scale to be compensated by adopting Y ═ 1-a × X + b to obtain a compensated gray scale of the sub-display area;
wherein, Y is the compensated gray scale, X is the gray scale to be compensated, b is the offset compensation value for compensation, and a is the obtained gain compensation value.
2. The optical compensation method of claim 1, wherein the specified gray scale threshold is 64 gray scales.
3. The optical compensation method of claim 1, wherein the reduced offset compensation value is one-half of the acquired offset compensation value.
4. Optical compensation method according to claim 1,
if the mura type of the sub-display area is dark-state mura, the value range of a is as follows: 1< a <1.3, and the value range of b is: b is more than or equal to 0;
if the mura type of the sub-display area is bright-state mura, the value range of a is as follows: 0< a <0.3, and the value range of b is as follows: b <0.
5. An optical compensation method as claimed in claim 1, wherein the obtaining of the stored compensation parameter values for the sub-display regions for each of the sub-display regions further comprises:
inputting the gray scale to be compensated to the display device;
acquiring brightness data of the display device by adopting a camera;
and calculating and storing a compensation parameter value of each sub-display area under the gray scale to be compensated according to the brightness data, and determining the mura type of each sub-display area according to the brightness data.
6. An optical compensation system applied to a display device including a plurality of sub-display regions, the optical compensation system comprising:
the first acquisition module is used for acquiring an input gray scale to be compensated;
a second obtaining module, configured to obtain, for each sub-display region, a stored compensation parameter value of the sub-display region in the to-be-compensated gray scale, where the compensation parameter value includes an offset compensation value;
the processing module is used for reducing the obtained offset compensation value if the gray scale to be compensated is less than or equal to a specified gray scale threshold value, taking the reduced offset compensation value as an offset compensation value for compensation, and taking the obtained offset compensation value as an offset compensation value for compensation if the gray scale to be compensated is greater than the specified gray scale threshold value;
the compensation module is used for compensating the gray scale to be compensated by adopting the offset compensation value for compensation to obtain a compensated gray scale of the sub-display area;
the storage module is used for storing the corresponding relation between the gray scale to be compensated and the compensated gray scale of each sub-display area;
the compensation parameter values further comprise gain compensation values;
the gain compensation value and the offset compensation value of each sub-display area under the gray scale to be compensated are stored by adopting the same byte, the gain compensation value occupies 6 bits, and the offset compensation value occupies 2 bits;
the compensation module is used for: if the mura type of the sub-display area is dark-state mura, compensating the gray scale to be compensated by adopting Y ═ a × X + b to obtain a compensated gray scale of the sub-display area; if the mura type of the sub-display area is bright-state mura, compensating the gray scale to be compensated by adopting Y ═ 1-a × X + b to obtain a compensated gray scale of the sub-display area; wherein, Y is the compensated gray scale, X is the gray scale to be compensated, b is the offset compensation value for compensation, and a is the obtained gain compensation value.
7. A display method is applied to a display device, wherein the display device comprises a plurality of sub-display areas, and the display method comprises the following steps:
acquiring a target gray scale to be compensated to be input into the sub-display area;
acquiring a target compensated gray scale corresponding to the target gray scale to be compensated according to the corresponding relation between the stored gray scale to be compensated and the compensated gray scale;
outputting the target compensated gray scale to the sub-display area;
wherein the correspondence is obtained by the method of any one of claims 1-5.
8. A display device, characterized in that the display device comprises a plurality of sub-display regions, the display device further comprising:
the first acquisition module is used for acquiring a target gray scale to be compensated to be input into the sub-display area;
the second acquisition module is used for acquiring a target compensated gray scale corresponding to the target gray scale to be compensated according to the corresponding relation between the stored gray scale to be compensated and the compensated gray scale;
the output module is used for outputting the target compensated gray scale to the sub-display area;
wherein the correspondence is obtained by the method of any one of claims 1-5.
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| CN111816121B (en) * | 2020-07-07 | 2021-11-05 | 合肥维信诺科技有限公司 | Display panel brightness compensation method and system and display panel |
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