CN106531066B - Gamma correction method and device for display module - Google Patents
Gamma correction method and device for display module Download PDFInfo
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- CN106531066B CN106531066B CN201611067060.0A CN201611067060A CN106531066B CN 106531066 B CN106531066 B CN 106531066B CN 201611067060 A CN201611067060 A CN 201611067060A CN 106531066 B CN106531066 B CN 106531066B
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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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
Abstract
The invention discloses a gamma correction method and a gamma correction device for a display module, wherein the method comprises the following steps: acquiring a time parameter value registered by a time register; assigning the acquired time parameter value to a counter, and starting the counter to start timing; if the counter finishes timing, the compensation time parameter value registered by the compensation time register is corrected; and adjusting the gamma register value by using the pre-stored compensation value corresponding to each gray scale to perform gamma correction on the display module. The gamma correction method and the gamma correction device for the display module can adjust the gamma register value of the pre-stored compensation value corresponding to each gray scale and carry out gamma correction on the display module; the brightness of the device is automatically compensated, the color cast is eliminated, and the influence of the aging of the device on the display effect is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a gamma correction method and device for a display module.
Background
An Organic Light Emitting Diode (OLED) Display device is an emerging flat panel Display device, and compared with a Liquid Crystal Display (LCD), the OLED Display device can self-emit Light without a backlight unit, and thus, generally speaking, the OLED Display device has lower power consumption than the LCD.
The pixel unit in the OLED display device includes a plurality of pixel units arranged in a matrix form. The pixel unit is divided into a Passive Matrix (PM) driving method and an Active Matrix (AM) driving method according to a driving method. The AMOLED has been widely used because it has significant advantages in viewing angle, color reproducibility, power consumption, and response time.
In the practical application process, the light emitting material of the OLED display device gradually ages with the increase of the display time, so that the light emitting efficiency is reduced, and the display effect is greatly affected. The solution to the above problem is mainly to adjust the gamma voltage to restore the display effect to normal, but the existing OLED display device only contains a set of data of the gamma voltage, and therefore the OLED display device must return to the factory to adjust the gamma voltage after aging. On this basis, the adjustment of the gamma voltage requires collecting the image brightness through a brightness collecting device, converting the image brightness into a gray scale (i.e., a gamma voltage value) after operation, and downloading the data to a time Control Register (TCON) integrated circuit again, so that the adjustment process is relatively complicated.
It can be seen that, when the gamma voltage of the OLED display device is adjusted by the above method, complicated adjustment must be performed by returning to the factory, which is not only troublesome for the user and costly for after-market maintenance.
Disclosure of Invention
The invention mainly aims to provide a gamma correction method and a gamma correction device for a display module, and aims to solve the problems caused by adjusting the gamma voltage of an OLED display device in the prior art.
In order to achieve the above object, the present invention provides a gamma correction method for a display module, the method comprising:
acquiring a time parameter value registered by a time register;
assigning the acquired time parameter value to a counter, and starting the counter to start timing;
if the counter finishes timing, correcting the compensation time parameter value registered by the compensation time register;
and adjusting the value of a gamma register by using a pre-stored compensation value corresponding to each gray scale to perform gamma correction on the display module.
Preferably, the adjusting the gamma register value by the pre-stored compensation value corresponding to each gray scale includes:
according to the corrected compensation time parameter value, searching a compensation value corresponding to each gray scale in a group corresponding to the corrected compensation time parameter value from prestored compensation values corresponding to each gray scale in the group;
and adjusting the gamma register value according to the compensation value corresponding to the searched group of gray scales, and performing gamma correction on the display module.
Preferably, the obtaining the time parameter value registered by the time register includes:
acquiring a compensation time parameter value registered by a compensation time register; and acquiring the time parameter value registered by the time register corresponding to the compensation time parameter value according to the compensation time parameter value.
Preferably, the compensation times parameter value registered by the correction compensation times register includes:
and correcting the compensation times parameter value registered by the compensation times register in a gradually increasing mode.
Preferably, the time parameter value registered by the time register and the compensation time parameter value registered by the compensation time register are determined according to the relation between the brightness of the display module and the time; and determining the compensation value corresponding to each pre-stored gray scale according to the relationship between the brightness and the voltage of the display module.
In addition, to achieve the above object, the present invention further provides a gamma correction device for a display module, the gamma correction device comprising: the system comprises an acquisition module, a starting module, a correction module and a gamma correction module;
the acquisition module is used for acquiring the time parameter value registered by the time register;
the starting module is used for assigning the time parameter value acquired by the acquiring module to a counter and starting the counter to start timing;
the correction module is used for correcting the compensation time parameter value registered by the compensation time register if the counter finishes timing;
and the gamma correction module is used for adjusting the gamma register value through a pre-stored compensation value corresponding to each gray scale and carrying out gamma correction on the display module.
Preferably, the gamma correction module comprises a search unit and a correction unit;
the search unit is used for searching a compensation value corresponding to each gray scale in a group corresponding to the corrected compensation time parameter value from prestored compensation values corresponding to each gray scale according to the corrected compensation time parameter value of the correction module;
and the correction unit is used for adjusting the gamma register value according to the compensation value corresponding to the group of gray scales searched by the search unit and carrying out gamma correction on the display module.
Preferably, the obtaining module is further configured to obtain a compensation time parameter value registered by the compensation time register; and acquiring the time parameter value registered by the time register corresponding to the compensation time parameter value according to the compensation time parameter value.
Preferably, the correction module is configured to correct the compensation time parameter value registered by the compensation time register in a step-by-step increasing manner if the counter completes timing.
Preferably, the apparatus further comprises a determination module;
the determining module is used for determining the time parameter value registered by the time register and the compensation time parameter value registered by the compensation time register according to the brightness and time relation of the display module; and the compensation value corresponding to each pre-stored gray scale is determined according to the relationship between the brightness and the voltage of the display module.
According to the gamma correction method and device for the display module, provided by the embodiment of the invention, the gamma register value can be adjusted by the pre-stored compensation value corresponding to each gray scale, and the gamma correction is carried out on the display module; the brightness of the device is automatically compensated, the color cast is eliminated, and the influence of the aging of the device on the display effect is reduced.
Drawings
FIG. 1 is a schematic flow chart of a gamma correction method for a display module according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a gamma correction device for a display module according to a second embodiment of the present invention;
FIG. 2 is a schematic flow chart of a gamma correction method for a display module according to a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a gamma correction device for a display module according to a fourth embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a relationship between brightness and time of a display module according to an embodiment of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Implementation of various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves.
As shown in fig. 1, a gamma correction method for a display module according to a first embodiment of the present invention includes:
101. and acquiring the time parameter value registered by the time register.
In this embodiment, the time parameter value registered by the time register and the compensation time parameter value registered by the compensation time register can be set according to the relationship between the brightness and the time of the display module.
Referring to fig. 5, a graph of the decay curve of a device (i.e., a display module) with lower luminous efficiency and higher luminous efficiency is shown, wherein the decay rate of the device with lower luminous efficiency is faster. In the figure, a luminance compensation curve for a lower luminous efficiency device is also shown. After the relationship between the aging time and the brightness of the device is known, relevant parameters can be set according to the compensation curve for compensation.
It should be noted that the compensation curve in the figure is only an exemplary compensation curve, and is not limited to only this compensation curve.
102. And assigning the acquired time parameter value to a counter, and starting the counter to start timing.
103. And if the counter finishes timing, correcting the compensation time parameter value registered by the compensation time register.
In this embodiment, the compensation times parameter value registered by the compensation times register can be modified in a step-by-step increasing manner. The parameter value of the compensation times registered by the compensation times register can be preset to be 0, the incremental step can be preset to be 1, it should be noted that the preset of the parameter value can be adjusted by a user, when the compensation times is increased to the maximum times, the compensation times are not increased, and the brightness compensation is not performed any more.
104. According to the corrected compensation time parameter value, searching a compensation value corresponding to each gray scale in a group corresponding to the corrected compensation time parameter value from prestored compensation values corresponding to each gray scale in the group; and adjusting the gamma register value according to the compensation value corresponding to the searched group of gray scales, and performing gamma correction on the display module.
In this embodiment, a plurality of sets of registers may be provided to register compensation values corresponding to a plurality of gray scales.
In this embodiment, the relationship between the device luminance and the driving current can be determined by the following equation: lu ═ k × I, where (k is the scaling factor).
The relationship between the driving current and the data line voltage can be determined by the following formula:
I＝k`*(ELVDD-Vdata)2wherein (k' is a proportionality coefficient).
From the above, the relationship between the luminance and the data line voltage is known as follows: lu ═ K ═ ELVDD-Vdata)2Wherein (K ═ K').
Therefore, the compensation value corresponding to each pre-stored gray scale can be determined according to the relationship between the brightness and the voltage of the display module.
In one possible embodiment, the compensation values corresponding to the gray levels pre-stored in the Δ R _ reg can be set according to the following table. Δ G _ reg, Δ B _ reg are similar. Where cmp represents the corrected offset times parameter value.
| Gray scale | cmp＝1 | cmp＝2 | …… | cmp＝254 | cmp＝255 |
| R255 | Δ1R255 | Δ2R255 | …… | Δ254R255 | Δ255R255 |
| R191 | Δ1R191 | Δ2R191 | …… | Δ254R191 | Δ255R191 |
| …… | …… | …… | …… | …… | …… |
| R3 | Δ1R3 | Δ2R3 | …… | Δ254R3 | Δ255R3 |
| R1 | Δ1R1 | Δ2R1 | …… | Δ254R1 | Δ255R1 |
For example, a plurality of sets of registers (Δ R _ reg, Δ G _ reg, Δ B _ reg) may be set to register compensation values corresponding to a plurality of sets of respective gray scales pre-stored in the table, a Time register Time _ reg may be set to register a Time parameter value, and a compensation times register may be set to register a compensation times parameter value cmp for cmp _ reg, where T is a timer.
After setting, firstly acquiring a Time parameter value registered by a Time register Time _ reg; assigning the acquired time parameter value to a counter T, and starting the counter T to start timing; if the counter finishes timing, correcting a compensation time parameter value cmp registered by a compensation time register cmp _ reg, assuming that the compensation time parameter value cmp registered by the compensation time register is preset to be 0, and an incremental step length is preset to be 1, and after the first execution, the corrected compensation time parameter value cmp is 1; according to the corrected compensation time parameter value, the compensation value corresponding to a group of gray scales corresponding to the corrected compensation time parameter value can be searched in the prestored compensation values corresponding to a plurality of groups of gray scales, and because the corrected compensation time parameter value cmp is equal to 1 at this time, the compensation value corresponding to a group of gray scales corresponding to the corrected compensation time parameter value is a row of which cmp is equal to 1 in the table; and adjusting the gamma register value according to the compensation value corresponding to the searched group of gray scales, and performing gamma correction on the display module.
According to the gamma correction method for the display module, provided by the embodiment of the invention, the gamma register value can be adjusted by the pre-stored compensation value corresponding to each gray scale, and the gamma correction is carried out on the display module; the brightness of the device is automatically compensated, the color cast is eliminated, and the influence of the aging of the device on the display effect is reduced.
Referring to fig. 2, a second embodiment of the invention further provides a gamma correction device for a display module corresponding to the first embodiment, the gamma correction device comprising: the system comprises an acquisition module 201, a starting module 202, a modification module 203 and a gamma correction module 204.
The obtaining module 201 is configured to obtain a time parameter value registered by the time register.
And the starting module 202 is configured to assign the time parameter value acquired by the acquiring module 201 to a counter, and start the counter to start timing.
And the correcting module 203 is configured to correct the compensation time parameter value registered by the compensation time register if the counter completes timing.
In this embodiment, the correcting module 203 is configured to correct the compensation time parameter value registered by the compensation time register in a step-by-step increasing manner if the counter completes timing.
The gamma correction module 204 includes a search unit 2041 and a correction unit 2042;
the searching unit 2041 is configured to search, according to the compensation time parameter value corrected by the correcting module 203, a compensation value corresponding to each gray scale in a group corresponding to the corrected compensation time parameter value from among pre-stored compensation values corresponding to each gray scale in the group;
the correcting unit 2042 is configured to adjust the gamma register value according to the compensation value corresponding to the group of gray scales found by the searching unit 2041, and perform gamma correction on the display module.
In this embodiment, the apparatus may further include a determination module (not shown in the figure); the determining module is used for determining a time parameter value registered by the time register and a compensation time parameter value registered by the compensation time register according to the brightness and time relation of the display module; and the compensation value corresponding to each pre-stored gray scale is determined according to the relationship between the brightness and the voltage of the display module.
The gamma correction device for the display module can adjust the gamma register value of the pre-stored compensation value corresponding to each gray scale, and perform gamma correction on the display module; the brightness of the device is automatically compensated, the color cast is eliminated, and the influence of the aging of the device on the display effect is reduced.
Referring to fig. 3, a third embodiment of the invention provides a gamma correction method for a display module, the method comprising:
301. acquiring a compensation time parameter value registered by a compensation time register; and acquiring the time parameter value registered by the time register corresponding to the compensation time parameter value according to the compensation time parameter value.
In this embodiment, the time parameter value registered by the time register and the compensation time parameter value registered by the compensation time register can be set according to the relationship between the brightness and the time of the display module.
Referring to fig. 5, a graph of the decay curve of a device (i.e., a display module) with lower luminous efficiency and higher luminous efficiency is shown, wherein the decay rate of the device with lower luminous efficiency is faster. In the figure, a luminance compensation curve for a lower luminous efficiency device is also shown. After the relationship between the aging time and the brightness of the device is known, relevant parameters can be set according to the compensation curve for compensation.
It should be noted that the compensation curve in the figure is only an exemplary compensation curve, and is not limited to only this compensation curve.
In this embodiment, a plurality of time registers are provided to register a plurality of time parameter values, and the number of entries of the time registers corresponds to the compensation times parameter value, for example: the Nth time register, where N is the offset times parameter value.
302. And assigning the acquired time parameter value to a counter, and starting the counter to start timing.
303. And if the counter finishes timing, correcting the compensation time parameter value registered by the compensation time register.
In this embodiment, the compensation times parameter value registered by the compensation times register can be modified in a step-by-step increasing manner. The parameter value of the compensation times registered by the compensation times register can be preset to be 1, the incremental step length can be preset to be 1, it should be noted that the preset of the parameter value can be adjusted by a user, when the compensation times is increased to the maximum times, the compensation times are not increased, and the brightness compensation is not performed any more.
304. And adjusting the gamma register value by using the pre-stored compensation value corresponding to each gray scale to perform gamma correction on the display module.
In this embodiment, the relationship between the device luminance and the driving current can be determined by the following equation: lu ═ k × I, where (k is the scaling factor).
The relationship between the driving current and the data line voltage can be determined by the following formula:
I＝k`*(ELVDD-Vdata)2wherein (k' is a proportionality coefficient).
From the above, the relationship between the luminance and the data line voltage is known as follows: lu ═ K ═ ELVDD-Vdata)2Wherein (K ═ K').
Therefore, the compensation value corresponding to each pre-stored gray scale can be determined according to the relationship between the brightness and the voltage of the display module.
In one possible embodiment, the pre-stored compensation values corresponding to the respective gray levels can be set according to the following table. Where Δ R _ reg, Δ G _ reg, Δ B _ reg represent register names for pre-stored compensation values.
| Gray scale | ΔR_reg | ΔG_reg | ΔB_reg |
| R255 | ΔR255 | ΔG255 | ΔB255 |
| R191 | ΔR191 | ΔG191 | ΔB191 |
| …… | …… | …… | …… |
| R3 | ΔR3 | ΔG3 | ΔB3 |
| R1 | ΔR1 | ΔG1 | ΔB1 |
As an example, a set of registers (Δ R _ reg, Δ G _ reg, Δ B _ reg) may be set to register compensation values corresponding to a set of pre-stored gray levels in the table, and a plurality of Time registers Time _ reg (cmp) may be set to register Time parameter values, where cmp is a compensation times parameter value; and setting a compensation time register to register a compensation time parameter value cmp for cmp _ reg, wherein T is a timer.
After setting, first obtaining a compensation time parameter value cmp registered by a compensation time register cmp _ reg, and obtaining a time parameter value registered by a time register corresponding to the compensation time parameter value cmp according to the compensation time parameter value cmp, for example: assuming that a compensation Time parameter value cmp registered by a compensation Time register is preset to be 1, after the first execution, acquiring a Time parameter value registered by a Time register Time _ reg (1), assigning the Time parameter value registered by the Time register Time _ reg (1) to a counter T, and starting the counter T to start timing; if the counter finishes timing, correcting the compensation time parameter value registered by the compensation time register, assuming that the increment step length is preset as 1, correcting cmp to 2 by adopting a gradual increment mode, and waiting for the next execution of the correction value for use; then, the gamma register value is adjusted by a set of compensation values (i.e. compensation values in the table) corresponding to each gray level registered by a set of preset registers (Δ R _ reg, Δ G _ reg, Δ B _ reg), so as to perform gamma correction on the display module.
According to the gamma correction method for the display module, provided by the embodiment of the invention, the gamma register value can be adjusted by the pre-stored compensation value corresponding to each gray scale, and the gamma correction is carried out on the display module; the brightness of the device is automatically compensated, the color cast is eliminated, and the influence of the aging of the device on the display effect is reduced.
Referring to fig. 4, a fourth embodiment of the present invention further provides a gamma correction device for a display module corresponding to the third embodiment, the gamma correction device comprising: an acquisition module 401, a start module 402, a modification module 403 and a gamma correction module 404.
An obtaining module 401, configured to obtain a compensation time parameter value registered by a compensation time register; and acquiring the time parameter value registered by the time register corresponding to the compensation time parameter value according to the compensation time parameter value.
A starting module 402, configured to assign the time parameter value obtained by the obtaining module 401 to a counter, and start the counter to start timing.
And a correcting module 403, configured to correct the compensation time parameter value registered by the compensation time register if the counter completes timing.
In this embodiment, the correcting module 403 is configured to correct the compensation time parameter value registered by the compensation time register in a step-by-step increasing manner if the counter completes timing.
And the gamma correction module 404 is configured to adjust a gamma register value by using a pre-stored compensation value corresponding to each gray scale, and perform gamma correction on the display module.
In this embodiment, the apparatus may further include a determination module (not shown in the figure); the determining module is used for determining a time parameter value registered by the time register and a compensation time parameter value registered by the compensation time register according to the brightness and time relation of the display module; and the compensation value corresponding to each pre-stored gray scale is determined according to the relationship between the brightness and the voltage of the display module.
The gamma correction device for the display module can adjust the gamma register value of the pre-stored compensation value corresponding to each gray scale, and perform gamma correction on the display module; the brightness of the device is automatically compensated, the color cast is eliminated, and the influence of the aging of the device on the display effect is reduced.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (2)
1. A gamma correction method for a display module, the method comprising:
acquiring a time parameter value registered by a time register;
assigning the acquired time parameter value to a counter, and starting the counter to start timing;
if the counter finishes timing, correcting the compensation time parameter value registered by the compensation time register in a gradual increasing mode, wherein the corrected compensation time parameter value is used for the next step of acquiring the time parameter value registered by the time register; then, adjusting the value of a gamma register by using a pre-stored compensation value corresponding to each gray scale, and carrying out gamma correction on the display module;
the obtaining of the time parameter value registered by the time register comprises:
acquiring a compensation time parameter value registered by a compensation time register;
acquiring a time parameter value registered by a time register corresponding to the compensation time parameter value according to the compensation time parameter value; wherein the content of the first and second substances,
and determining a time parameter value registered by the time register and a compensation time parameter value registered by the compensation time register according to the brightness-time relation of the display module, and determining a compensation value corresponding to each pre-stored gray scale according to the brightness-voltage relation of the display module.
2. A gamma correction device for a display module, the device comprising: the system comprises an acquisition module, a starting module, a correction module and a gamma correction module;
the acquisition module is used for acquiring the time parameter value registered by the time register;
the starting module is used for assigning the time parameter value acquired by the acquiring module to a counter and starting the counter to start timing;
the correction module is used for correcting the compensation time parameter value registered by the compensation time register in a step-by-step increasing mode if the counter finishes timing, and the corrected compensation time parameter value is used when the acquisition module acquires the time parameter value registered by the time register next time;
the gamma correction module is used for adjusting the value of a gamma register through a pre-stored compensation value corresponding to each gray scale and carrying out gamma correction on the display module;
the acquisition module is used for acquiring the compensation time parameter value registered by the compensation time register; acquiring a time parameter value registered by a time register corresponding to the compensation time parameter value according to the compensation time parameter value;
the apparatus also includes a determination module;
the determining module is used for determining the time parameter value registered by the time register and the compensation time parameter value registered by the compensation time register according to the brightness and time relation of the display module; and the compensation value corresponding to each pre-stored gray scale is determined according to the relationship between the brightness and the voltage of the display module.
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| CN111063289B (en) * | 2019-12-25 | 2022-08-02 | Tcl华星光电技术有限公司 | Gray scale compensation method and device and display equipment |
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| CN113096576B (en) * | 2021-04-02 | 2023-05-26 | 京东方科技集团股份有限公司 | Brightness compensation method and device and display device |
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