CN112382247A - Display device and gamma curve adjusting method thereof - Google Patents
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- CN112382247A CN112382247A CN202011221359.3A CN202011221359A CN112382247A CN 112382247 A CN112382247 A CN 112382247A CN 202011221359 A CN202011221359 A CN 202011221359A CN 112382247 A CN112382247 A CN 112382247A
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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
- G09G3/36—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 using liquid crystals
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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 display device and an adjusting method of a gamma curve thereof, which are characterized in that the adjusting method comprises the following steps: adjusting the gamma value corresponding to each gray scale in the full gray scale range to a target gamma value; and adjusting a first gamma value corresponding to each gray scale in a first gray scale area which is less than or equal to the first boundary gray scale so as to enable the first gamma value to be less than the target gamma value. The chromaticity visual angle of the display device can be improved and the display effect can be improved by adjusting the gamma value corresponding to the gray scale under the condition of not changing the manufacturing process.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device and a gamma curve adjusting method thereof.
Background
Liquid crystal displays have been widely used, and common display modes include three types, namely tn (twisted nematic), IPS (In-Plane Switching), and va (vertical Alignment liquid crystal), and the different display modes have advantages and disadvantages. Among them, the VA display mode has much higher contrast than IPS, has a fast response time, and does not require rubbing alignment, and is a common display mode of a liquid crystal panel for a large-sized TV. However, due to different birefringence effects of liquid crystal, the VA-mode lcd has a larger viewing angle chromaticity deviation than the IPS-mode lcd, which causes the problem that the VA-mode lcd has a lower contrast ratio of the image due to the V-T curve drift under a large viewing angle (off-axis), and the image quality is worse than the IPS display mode when viewed from the side, i.e., the chromaticity viewing angle is smaller, but improving the chromaticity viewing angle involves the process adjustment, which leads to the problems of increased cost of the liquid crystal cell (cell) and yield loss.
Therefore, the prior art has defects and needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a gamma curve adjusting method for improving the chromaticity visual angle of a display device and the display device.
In order to achieve the above object, the present invention provides a method for adjusting a gamma curve of a display device, comprising:
adjusting the gamma value corresponding to each gray scale in the full gray scale range to a target gamma value;
and adjusting a first gamma value corresponding to each gray scale in a first gray scale area which is less than or equal to the first boundary gray scale so as to enable the first gamma value to be less than the target gamma value.
In some embodiments, further comprising: and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first boundary gray scale so as to enable the second gamma value to be the same as the first gamma value.
In some embodiments, further comprising: and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first boundary gray scale so as to enable the second gamma value to be larger than the target gamma value.
In some embodiments, the first demarcation gray level is 86 levels and the target gamma value is 2.2.
In some embodiments, the first gamma value is greater than or equal to 1.8 and less than 2.2.
In some embodiments, the second gamma value is greater than 2.2 and less than or equal to 2.6.
The present invention also provides a display device comprising a memory and a processor, the memory storing a plurality of instructions adapted to be loaded by the processor and to perform the steps of:
adjusting the gamma value corresponding to each gray scale in the full gray scale range to a target gamma value;
and adjusting a first gamma value corresponding to each gray scale in a first gray scale area which is less than or equal to the first boundary gray scale so as to enable the first gamma value to be less than the target gamma value.
In some embodiments, the plurality of instructions further comprise instructions adapted to be loaded by the processor and perform the steps of:
adjusting a second gamma value corresponding to each gray level in a second gray level region larger than the first boundary gray level so that the second gamma value is the same as the first gamma value, or,
and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first demarcation gray scale so as to enable the second gamma value to be larger than the target gamma value.
In some embodiments, the first demarcation gray scale is 86 levels, the target gamma value is 2.2, the first gamma value is greater than or equal to 1.8 and less than 2.2, and the second gamma value is greater than 2.2 and less than or equal to 2.6.
The invention has the beneficial effects that: on the premise of not changing the process of the display device, the chromaticity visual angle of the display device is improved by an optical debugging method, and the display effect is rapidly improved at low cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments 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 to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a table of color signals for 9 colors in an embodiment of the present invention.
FIG. 2 is a diagram illustrating a method for measuring chromatic aberration under different conditions according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating an exemplary gamma curve adjustment procedure.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
The embodiment of the invention provides a display device, which comprises a plurality of pixel units, wherein each pixel unit comprises a plurality of color sub-pixels. For example, if the display device is an RGB liquid crystal display device, each pixel unit on the display device includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
The number of gray levels of the pixels varies from display panel to display panel, for example, when the display panel is an 8-bit liquid crystal panel, the number of gray levels is 256, and the gray levels can be represented as 0,1,2 … …,255 in sequence. In this case, the minimum grayscale value is 0, and the maximum grayscale value m is 255.
The current image processing technology divides a display area on a liquid crystal display panel into a plurality of pixels (pixels), and each Pixel has three primary colors of red, green, blue, and the like. Since all visible light colors can be generated by mixing red (R), green (G) and blue (B) sub-pixels, the brightness of the red (R), green (G) and blue (B) sub-pixels is controlled to construct the Color to be expressed by a pixel, in order to describe the Color more properly, the International Commission on Illumination (CIE) proposes the CIE 1931XYZ Color Space (CIE XYZ Color Space), which uses the three colors of red, green and blue as three colors, all other colors can be formed by mixing the three primary colors, and all colors are represented by X, Y and Z tristimulus values in different proportions of the three primary colors.
The liquid crystal display device is provided with a time sequence control chip, the time sequence control chip is provided with a white balance adjusting module, and the white balance adjusting module is used for adjusting the gray scale values of three primary colors, namely the gray scale values of RGB. Any gray scale of the liquid crystal display device is formed by mixing three primary colors with certain gray scale. On the premise of ensuring the consistent chromaticity, the gray scale proportion of the three primary colors is adjusted, and then the gray scale brightness can be adjusted. Fig. 1 shows the gray scale values of R, G, B three primary colors corresponding to 9 colors.
The Gamma (Gamma) curve is a curve representing the relationship between the brightness and the gray scale of the liquid crystal display device, and the Gamma curve can be adjusted when the conventional VA type liquid crystal display device is delivered, specifically, the Gamma voltage value when the liquid crystal display device displays a plurality of preset binding point gray scales is adjusted to a preset value corresponding to a target Gamma value, and the common target Gamma value is 2.2, so that the viewing feeling of human eyes is met.
In the TFT-LCD, the color coordinates commonly used include xy color coordinates and uv color coordinates, and the degree of deviation of the color in the coordinates can be evaluated by calculating the horizontal color difference using the difference between each point on the uv color coordinates. The specific test and calculation methods are as follows:
a) the first color signal in the table shown in FIG. 1 was displayed, and the colorimetric value (u 'at the front view angle of the central region was measured using a colorimeter'01，v′01)；
b) The colorimeter was moved horizontally in position, and (u ') at each angle was tested'i1，v′i1)；
c) Eight other color signals are displayed, test color coordinate (u'02，v′02)～(u′09，v′09)；
d) Repeating the steps b) to c), and testing the color coordinate (u ') in the horizontal direction'i2，v′i2)～(u′i9，v′i9)；
e) Calculating the horizontal color difference by the following formula
In the formula:
i-positive integer, representing different horizontal angles;
k-1 to 9, which respectively represent signals of 9 colors;
f) calculating the average color difference value of the 9 color differences, and drawing a relation curve between the angle of each color and the color difference;
g) and finding out left and right angle positions with the average chromatic aberration of 0.020 or 0.03, wherein the sum of the left and right angles is a horizontal color visual angle corresponding to the chromatic aberration of 0.02 or a horizontal color visual angle corresponding to the chromatic aberration of 0.03.
In the present embodiment, the evaluation object of the chromaticity viewing angle of the liquid crystal display device is a horizontal viewing angle when the color difference at the center of the screen of the liquid crystal display device is equal to 0.03. And verifying the influence of different condition adjustment modes on the corresponding chromaticity visual angle when the chromatic aberration is 0.03 by adjusting the corresponding white balance optical code.
This example was designed with three sets of comparative examples, in which the horizontal chromaticity viewing angle under each condition in each set of comparative examples was measured and calculated. Three sets of comparative examples are specified in the following table.
Comparative example 1 the grey scale value of R, G, B was adjusted as follows:
| serial number | Adjustment scheme | R | G | B |
| Condition 1.1 | RGB unreduced order | 255 | 255 | 255 |
| Condition 1.2 | 15-order RGB reduction | 240 | 240 | 240 |
| Condition 1.3 | R is reduced by 15 steps | 240 | 255 | 255 |
| Condition 1.4 | G reduction by 15 steps | 255 | 240 | 255 |
| Condition 1.5 | Reduction of B by 15 steps | 255 | 255 | 240 |
Comparative example 2: the gamma value of each gray scale is integrally adjusted as follows:
| serial number | Adjustment scheme | Gamma value |
| Condition 2.1 | Gamma value of each gray scale | 2.2 |
| Condition 2.2 | The gamma value of each gray scale is increased | 2.4 |
| Condition 2.3 | The gamma value of each gray scale is reduced | 2.1 |
| Condition 2.4 | The gamma value of each gray scale is reduced | 2 |
Comparative example 3: adjusting each gray level gamma value in a segmented way, which comprises the following steps:
for the calculation of the horizontal viewing angle under different conditions in each comparative example, as shown in fig. 2-3, the specific steps are as follows:
step S1: measuring tristimulus values XYZ of 0-255 gray scales of WRGB corresponding to a front-view 0 degree W and a side-view large viewing angle A when a white balance code of the display screen 1 is closed as original data; the preferred side large viewing angle a of the present embodiment includes 30 degrees and 45 degrees;
step S2: measuring the 0-degree W255-order brightness and the chroma of the front-view white picture under different conditions based on the 255-order white balance code under different conditions;
step S3: calculating the white balance code of each gray scale according to the principle that the gamma value is 2.2 at 0 ℃ of the front-view white picture and the chroma of each order is the same as that of 255 orders;
step S4: calculating new tristimulus values XYZ corresponding to the front viewing 0 degree W and the side viewing large angle A of the 9 color charts according to the white balance codes of all levels of all conditions;
step S5: calculating horizontal color coordinates (u 'of the different color charts with the front view 0 degree W and the side view large angle A according to the new tristimulus values XYZ of the different color charts with the front view 0 degree W and the side view large angle A corresponding to the conditions'01，v′01) Angular horizontal color coordinate (u ') between different side view major angles'01，v′01)A linear interpolation calculation;
step S6: and calculating the corresponding horizontal chroma visual angle when the average color difference is 0.03 according to the chroma visual angle calculating method.
The horizontal chromaticity viewing angles for each of the three comparative examples were obtained as shown in the following table:
comparative example 1:
comparative example 2:
comparative example 3:
according to the above results, the influence of the reduced gray-scale value on the horizontal chromaticity visual angle is very little in the comparative example 1, and the influence of the overall downward-adjusted gamma value on the horizontal chromaticity visual angle is more obvious than the influence of the overall upward-adjusted gamma value on the horizontal chromaticity visual angle in the comparative example 2; in comparative example 3, the horizontal chromaticity viewing angle can be significantly improved by adjusting the middle and low gray levels to be smaller and the high gray level to be larger in a stepwise manner.
Based on the above results, as shown in fig. 3, an embodiment of the invention provides a method for adjusting a gamma curve of a display device, where the gamma curve corresponds to a full gray scale range from 0 to 255, a first boundary gray scale divides the full gray scale range into a first gray scale region smaller than or equal to the first boundary gray scale and a second gray scale region larger than the first boundary gray scale, a gamma value corresponding to each gray scale in the first gray scale region is a first gamma value, and a gamma value corresponding to each gray scale in the second gray scale region is a second gamma value. The adjusting method comprises the following steps:
step S1: firstly, adjusting the gamma value corresponding to each gray scale in the full gray scale range to a target gamma value, wherein the target gamma value is usually about 2.2, and 2.2 is preferred in the embodiment;
step S2: then, a first gamma value corresponding to each gray scale in a first gray scale zone which is smaller than or equal to a first boundary gray scale is adjusted, so that the first gamma value is smaller than the target gamma value, namely the first gamma value is smaller than 2.2. Therefore, the chromaticity visual angle of the display device can be improved by adjusting the gamma value corresponding to the middle and low gray scales, the display effect of the display device is improved, and the process of the display device is not required to be changed.
According to the gray scale signals of the sub-pixels of 9 colors shown in fig. 1, the low gray scale in the sub-pixels of most colors does not exceed 86 levels, and therefore, the first dividing gray scale is preferably 86 levels in this embodiment.
In consideration of the fact that a display screen tends to be whitish when the gamma value is too small, it is preferable that the first gamma value is greater than or equal to 1.8 and less than 2.2.
In this embodiment, the adjusting method further includes:
step S3: and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first boundary gray scale so as to enable the second gamma value to be smaller than the target gamma value.
In this embodiment, the first gamma value and the second gamma value can be adjusted simultaneously, that is, the first gamma value and the second gamma value are adjusted synchronously to be smaller than the target gamma value, that is, smaller than 2.2, and particularly, the first gamma value and the second gamma value are the same, so that the uniformity of the brightness variation of the display image can be ensured as much as possible.
In other embodiments, in step S3, the first gamma value and the second gamma value may be respectively adjusted, for example, as shown in the above comparative example 3, the first gamma value and the second gamma value are respectively adjusted, specifically, the first gamma value is adjusted to be less than 2.2 and the second gamma value is adjusted to be greater than 2.2 with the first boundary gray scale as a boundary, which is known from the debugging result of the foregoing comparative example 3, so that the adjustment can significantly improve the horizontal chromaticity viewing angle of the liquid crystal display device and improve the display effect at a large viewing angle.
In order to avoid the situation that the gamma value is too large to cause the picture to be black or too small to cause the picture to be white, the first gamma value is preferably greater than or equal to 1.8 and less than 2.2, and the second gamma value is preferably greater than 2.2 and less than or equal to 2.6. Therefore, the size of the chromaticity visual angle is improved, and the display effect can be ensured.
It is considered that adjusting the first gamma value and the second gamma value respectively may cause the gamma value to change abruptly at the first boundary gray scale, thereby causing distortion of the displayed image. In other embodiments, the first gamma value and the second gamma value may be continuously changed with the change of gray scale in all or part of the range of the first gray scale region and the second gray scale region corresponding to the first gamma value and the second gamma value, respectively, that is, the first gamma value and the second gamma value may be variable gamma values, and the first gamma value and the second gamma value are equal at the first boundary gray scale. In other words, a gray scale region of the display device, in which the gamma value changes in the vicinity of the first dividing gray scale, is referred to as a first transition gray scale region, and the gray scale range of the first transition gray scale region is adaptively selected according to the difference between the first gamma value and the second gamma value, so that the gamma value can be smoothly transitioned. For example, the gray scale range of the first transition gray scale is in a range of front and rear 2 stages (+ -2 stages) to front and rear 5 stages (+ -5 stages) of the first division gray scale. Therefore, the phenomenon that the display picture is abnormal and the display effect is influenced due to the fact that the gamma value changes suddenly at the first demarcation gray scale can be avoided. The range from front and rear 2 st order (+ -2 nd order) to front and rear 5 th order (+ -5 th order) described herein is only an example for explaining the first transition gray scale, and is not a limitation for limiting the corresponding gray scale range of the present invention.
In addition, when the gray scale is lower, the gamma value corresponding to the gray scale gradually increases from 0 to a preset gamma value along with the continuous increase of the gray scale, and the gray scale range is a second transition gray scale of the gamma value change.
The embodiment of the present invention further provides a display device, which includes a memory and a processor, where the memory stores a plurality of instructions, and the plurality of instructions are suitable for being loaded by the processor and executing the following steps:
adjusting the gamma value corresponding to each gray scale in the full gray scale range to a target gamma value;
and adjusting a first gamma value corresponding to each gray scale in a first gray scale area which is less than or equal to the first boundary gray scale so as to enable the first gamma value to be less than the target gamma value.
In some embodiments, the plurality of instructions further comprise instructions adapted to be loaded by the processor and perform the steps of: and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first demarcation gray scale so as to enable the second gamma value to be the same as the first gamma value.
In still other embodiments, the plurality of instructions further comprise instructions adapted to be loaded by the processor and perform the steps of: and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first demarcation gray scale so as to enable the second gamma value to be larger than the target gamma value.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the description of the above embodiments is only used to help understanding the technical scheme and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for adjusting a gamma curve of a display device, the method comprising:
adjusting the gamma value corresponding to each gray scale in the full gray scale range to a target gamma value;
and adjusting a first gamma value corresponding to each gray scale in a first gray scale area which is less than or equal to the first boundary gray scale so as to enable the first gamma value to be less than the target gamma value.
2. The adjustment method of claim 1, further comprising:
and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first boundary gray scale so as to enable the second gamma value to be the same as the first gamma value.
3. The adjustment method of claim 1, further comprising:
and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first boundary gray scale so as to enable the second gamma value to be larger than the target gamma value.
4. The adjusting method of claim 1 or 2, wherein the first demarcation gray level is 86 levels and the target gamma value is 2.2.
5. The adjustment method of claim 4, wherein the first gamma value is greater than or equal to 1.8 and less than 2.2.
6. The adjusting method of claim 3, wherein the first gray level is 86 th level, the target gamma value is 2.2, and the second gamma value is greater than 2.2 and less than or equal to 2.6.
7. A display device comprising a memory and a processor, the memory storing a plurality of instructions, wherein the plurality of instructions are adapted to be loaded by the processor and perform the steps of:
adjusting the gamma value corresponding to each gray scale in the full gray scale range to a target gamma value;
and adjusting a first gamma value corresponding to each gray scale in a first gray scale area which is less than or equal to the first boundary gray scale so as to enable the first gamma value to be less than the target gamma value.
8. The display device according to claim 7, wherein the first demarcation gray scale is 86 th order, the target gamma value is 2.2, and the first gamma value is greater than or equal to 1.8 and less than 2.2.
9. The display apparatus of claim 8, wherein the plurality of instructions further comprise instructions adapted to be loaded by the processor and perform the steps of:
adjusting a second gamma value corresponding to each gray level in a second gray level region larger than the first boundary gray level so that the second gamma value is the same as the first gamma value, or,
and adjusting a second gamma value corresponding to each gray scale in a second gray scale area larger than the first boundary gray scale so as to enable the second gamma value to be larger than the target gamma value.
10. The display device of claim 9, wherein the second gamma value is greater than 2.2 and less than or equal to 2.6 when the second gamma value is greater than the target gamma value.
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| CN104123926A (en) * | 2013-04-25 | 2014-10-29 | 乐金显示有限公司 | Gamma compensation method and display device using the same |
| CN104952410A (en) * | 2015-07-14 | 2015-09-30 | 深圳市华星光电技术有限公司 | LCD (liquid crystal display) panel display improving method and device |
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| CN109147689A (en) * | 2018-08-21 | 2019-01-04 | 惠州市华星光电技术有限公司 | The method of adjustment of liquid crystal display and its gamma curve |
| CN111415616A (en) * | 2020-04-27 | 2020-07-14 | 京东方科技集团股份有限公司 | Method for improving picture display quality, time sequence controller and display device |
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| CN112992036A (en) * | 2021-02-26 | 2021-06-18 | 北海惠科光电技术有限公司 | Display panel driving method and device and display equipment |
| CN112992036B (en) * | 2021-02-26 | 2022-05-31 | 北海惠科光电技术有限公司 | Display panel driving method and device and display equipment |
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