CN113763892B - Gray scale adjusting method, display module, electronic equipment and readable storage medium - Google Patents
Gray scale adjusting method, display module, electronic equipment and readable storage medium Download PDFInfo
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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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
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The application discloses a gray scale adjusting method of a display module, the display module, an electronic device and a readable storage medium. The method comprises the following steps: under the preset backlight brightness, adjusting the driving reference voltage of the display module to enable the gray scale brightness of the display module to accord with a preset gamma curve; detecting the display brightness values of the display modules corresponding to the at least two gray-scale values; calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve; under the reference voltage corresponding to the target gray scale value, adjusting the backlight brightness to enable the display brightness value of the display module to reach the target brightness value corresponding to the target gray scale value; recording each target gray scale value and the corresponding backlight current value to obtain a gray scale current corresponding relation; and controlling the display module to display according to the gray-scale current corresponding relation. The gray scale brightness of the backlight brightness compensation display module is controlled, so that the actual gray scale brightness of the module is consistent with the gray scale brightness required by a target gamma value.
Description
Technical Field
The present disclosure relates to display technologies, and in particular, to a gray scale adjusting method, a display module, an electronic device, and a readable storage medium.
Background
The Gamma value of the liquid crystal module refers to an index of a relation curve fitting the gray scale and the brightness of the liquid crystal module. When the index of the curve is 2.2, the linear relation of human eyes to brightness change and gray scale change is met, namely, the gray scale transition is more uniform, and the display effect is better.
The current Gamma optimization scheme is that only a plurality of (generally dozens to dozens) reference voltages are generated by optimizing a Gamma circuit resistor network, then the reference voltages required by each gray scale are generated by simulating through a Gamma internal circuit, and the reference voltages drive liquid crystals to turn over so as to control the gray scale.
However, the brightness of each gray level cannot completely satisfy the requirement of Gamma value 2.2 due to the circuit precision inside Gamma and the influence of liquid crystal deflection characteristic, and the tolerance is usually ± 0.3.
Disclosure of Invention
In view of the above, the present invention is directed to solving at least one of the problems in the related art to some extent. Therefore, the present application is directed to a gray scale adjustment method for a display module, an electronic device and a readable storage medium.
The embodiment of the application provides a gray scale adjusting method of a display module. The gray scale adjusting method comprises the following steps: under the preset backlight brightness, adjusting the driving reference voltage of the display module to enable the gray scale brightness of the display module to accord with a preset gamma curve; detecting display brightness values of the display modules corresponding to the at least two gray-scale values; calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve; under the reference voltage corresponding to the target gray scale value, adjusting the backlight brightness to enable the display brightness value of the display module to reach the target brightness value corresponding to the target gray scale value; recording each target gray scale value and a corresponding backlight current value to obtain a gray scale current corresponding relation; and controlling the display module to display according to the gray scale current corresponding relation.
In some embodiments, the detecting the display brightness values of the display module corresponding to the at least two gray-scale values includes: detecting the display brightness value of the display module corresponding to the gray scale value of 0 and the gray scale value of 255; calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve, and the method comprises the following steps: the target brightness value corresponding to any target gray scale value is calculated by the following conditional expression:
wherein L is N Is any of the target gray scale values, IL N Is a target luminance value, IL, corresponding to said target gray level value 0 The display brightness value, IL, of the display module corresponding to the gray scale value of 0 255 The display brightness value of the display module corresponding to the gray scale value of 255 is shown.
In some embodiments, the adjusting the backlight brightness to make the display brightness value of the display module reach the target brightness value corresponding to the target gray scale value includes: reducing the backlight brightness under the condition that the display brightness value of the display module is greater than the target brightness value corresponding to the target gray scale value; and under the condition that the display brightness value of the display module is smaller than the target brightness value corresponding to the target gray scale value, the backlight brightness is increased.
In some embodiments, adjusting the backlight brightness to make the display brightness value of the display module reach the target brightness value corresponding to the target gray scale value includes: reducing the backlight current value of the display module to reduce the backlight brightness; or increasing the backlight current value of the display module to increase the backlight brightness.
In some embodiments, recording each of the gray scale values and the corresponding backlight current value to obtain a gray scale current correspondence relationship includes: and writing the gray scale current corresponding relation into a backlight driving chip or a mainboard of the display module.
In some embodiments, controlling the display module to display according to the gray-scale current correspondence includes: determining a display gray scale value according to the display signal; determining a display backlight current value according to the display gray scale value and the gray scale current corresponding relation; and driving the corresponding backlight light source according to the display backlight current value.
In some embodiments, one backlight source corresponds to a plurality of pixel units, and the determining a display gray scale value according to a display signal includes: calculating target display signals according to the display signals of the plurality of pixel units corresponding to the backlight light source; and determining the display gray scale value according to the target display signal.
The application also provides a display module. The display module assembly includes: the device comprises a voltage adjusting module, a detecting module, a calculating module, a brightness adjusting module, a relation determining module and a control module. The driving voltage adjusting module is used for adjusting the driving reference voltage of the display module under the preset backlight brightness so as to enable the gray scale brightness of the display module to accord with a preset gamma curve; the detection module is used for detecting the display brightness values of the display modules corresponding to at least two gray-scale values; the calculation module is used for calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve; the brightness adjusting module is used for adjusting backlight brightness under the reference voltage corresponding to the target gray scale value in sequence to enable the display brightness value of the display module to reach a target brightness value corresponding to the target gray scale value; the relation determining module is used for recording each target gray-scale value and the corresponding backlight current value to obtain a gray-scale current corresponding relation; the control module is used for controlling the display module to display according to the gray scale current corresponding relation.
The application also provides an electronic device. The electronic device comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the gray scale adjustment method of any one of the above embodiments is realized.
The present application also provides a non-transitory computer-readable storage medium of a computer program. The computer program, when executed by one or more processors, implements the gray scale adjustment method of any of the above embodiments.
The gray scale brightness of the backlight brightness compensation display module is controlled, so that the actual gray scale brightness of the module is consistent with the gray scale brightness required by a target gamma value.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow chart illustrating a gray scale adjustment method for a display module according to some embodiments of the present disclosure;
FIG. 2 is a schematic structural diagram of a display module according to some embodiments of the present disclosure;
FIG. 3 is a schematic structural diagram of a display module according to some embodiments of the present disclosure;
FIG. 4 is a schematic structural diagram of a display module according to some embodiments of the present disclosure;
FIG. 5 is a schematic flow chart illustrating a gray scale adjustment method of a display module according to some embodiments of the present disclosure;
FIG. 6 is a schematic flow chart illustrating a gray scale adjustment method of a display module according to some embodiments of the present disclosure;
FIG. 7 is a flowchart illustrating a gray scale adjustment method of a display module according to some embodiments of the present disclosure;
FIG. 8 is a block diagram of a control module in a display module according to some embodiments of the present disclosure;
FIG. 9 is a schematic diagram of a gray scale adjustment method of a display module according to some embodiments of the present disclosure;
FIG. 10 is a schematic structural diagram of a display module according to some embodiments of the present disclosure;
FIG. 11 is a schematic structural diagram of a display module according to some embodiments of the present disclosure;
FIG. 12 is a flowchart illustrating a gray scale adjustment method of a display module according to some embodiments of the present disclosure;
FIG. 13 is a schematic structural diagram of an electronic device according to some embodiments of the present application;
FIG. 14 is a block diagram of a computer-readable storage medium according to some embodiments of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that 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 as implying that the number of indicated technical features is 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 application, "a plurality" means two or more unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed.
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Referring to fig. 1, the present application provides a gray scale adjusting method for a display module. The gray scale adjusting method comprises the following steps:
01: under the preset backlight brightness, adjusting the driving reference voltage of the display module to enable the gray scale brightness of the display module to accord with a preset gamma curve;
02: detecting display brightness values of the display modules corresponding to the at least two gray-scale values;
03: calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve;
04: under the reference voltage corresponding to the target gray scale value, adjusting the backlight brightness to enable the display brightness value of the display module to reach the target brightness value corresponding to the target gray scale value;
05: recording each target gray scale value and the corresponding backlight current value to obtain a gray scale current corresponding relation;
06: and controlling the display module to display according to the gray-scale current corresponding relation.
Referring to fig. 2, the present application further provides a display module 10. The display module 10 includes: the device comprises a voltage adjusting module 11, a detecting module 12, a calculating module 13, a brightness adjusting module 14, a relation determining module 15 and a control module 16.
Specifically, first, a preset backlight brightness L of a backlight unit (BLU) of the display module 10 is set Back of body Fixing by adjusting the driving reference voltage V of the driving chip for driving the display module Base (C) So that the gray scale brightness of the display module conforms to the preset gamma curve. The display module 10 may be a liquid crystal display module.
The display module 10 includes a backlight module and a display panel, the structural relationship between the backlight module and the display panel is shown in fig. 3, and the connection relationship between the backlight module and the display panel is shown in fig. 4. The display module can enable one backlight source to correspond to the pixel unit in one display panel.
In addition, under the condition that the backlight module has a plurality of backlight sources and the number of the backlight sources is less than the number of the pixel units, the display module of the present application is a backlight source corresponding to the plurality of pixel units in the display panel.
In other embodiments of the present application, when the backlight module has only one backlight source, one backlight source may correspond to a plurality of pixel units in the display panel. For example, the backlight module may be a side-in type backlight module.
Wherein, the backlight brightness L is preset Back of body The backlight brightness value may be set by the user, or may be a default backlight brightness value of the display module, which is not limited herein.
The preset gamma curve may be, for example, a gamma curve with a gamma value of 2.2, or other gamma curves.
And then, detecting the display brightness values of the display modules corresponding to the at least two gray-scale values. The detection of the at least two gray scale values comprises the detection of the display brightness value of the display module corresponding to the two gray scale values and the detection of the display brightness value of the display module corresponding to more than two gray scale values. When the display brightness values of the display modules corresponding to the two gray scale values are detected, the display brightness values of the display modules corresponding to the two gray scale values of the 0 gray scale and the 255 gray scale may be detected, the display brightness values of the display modules corresponding to the two gray scale values of the 1 gray scale and the 254 gray scale may be detected, or the display brightness values of the display modules corresponding to other gray scales may be detected. When the display brightness values of the display modules corresponding to more than two gray scale values are detected, the display brightness values of the display modules corresponding to three gray scale values of 0 gray scale, 100 gray scale and 255 gray scale can be detected, the display brightness values of the display modules corresponding to four gray scale values of 0 gray scale, 1 gray scale, 90 gray scale and 254 gray scale can be detected, or the display brightness values of the display modules corresponding to other numbers of gray scales can be detected. It should be noted that the more the detected gray scale values are, the more the data of the display brightness values corresponding to the obtained gray scale values are, so that the final gray scale adjustment result of the display module is more accurate and better conforms to the preset gamma curve.
And then, calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve. Specifically, an arbitrary target gray level value L may be calculated according to the following formula N Corresponding target luminance value IL N ：
In the formula, L N1 And L N2 For the two gray levels of detection, IL, described above N1 For the detected gray level L N1 Display brightness value, IL, of the corresponding display module N2 For the detected gray level L N2 And the display brightness value of the corresponding display module.
Then, since the backlight brightness L is preset Back of body Then, only several (typically tens to tens) reference voltages can be generated by optimizing the Gamma circuit resistor network. Then, a target gray scale value L is determined based on the reference voltage required for generating each gray scale through the simulation of the Gamma internal circuit N The corresponding reference voltage.
Therefore, the gray levels can be sequentially set at the target gray level L N Under the corresponding reference voltage, N belongs to (0-255) gray scale, and the backlight brightness L is adjusted Back of body So that the display brightness value of the display module reaches the target gray level value L N Corresponding target luminance value IL N 。
Understandably, the backlight brightness L is constant due to the voltage and resistance of the backlight unit (BLU) Back of body And the backlight current I Back of body Is proportional, therefore, by adjusting the backlight brightness L Back of body Obtaining the adjusted backlight current L Back of body ' so that the display brightness value of the display module reaches the target gray level value L N Corresponding target luminance value IL N I.e. by adjusting the backlight current I Back of body Obtaining the adjusted backlight current I Back of body ' to make the display brightness value of the display module reach the target gray level value L N Corresponding target luminance value IL N 。
At this time, as shown in fig. 3, the gray scale adjusting method of the present application is that one backlight source corresponds to one pixel unit, that is, one backlight source drives one pixel unit to emit light, so as to obtain a backlight brightness L Back of body And a backlight current I Back of body . Therefore, at this time, there are how many target luminance values IL N Corresponding to how many adjusted backlight brightness L Back of body ' and backlight current I Back of body ’。
Thus, each target gray level value L can be recorded N And corresponding backlight current I Back of body ' obtaining a gray-scale current correspondence, i.e. L N And I Back of body ' of the same. Wherein L is N And I Back of body The gray scale current relationship of' is a non-linear positive correlation. Please refer to fig. 4 in combinationTo adjust the target gray level L at this time N Corresponding backlight current value I Back of body ' is recorded in a driving chip (BLU IC) of the backlight module or on a driving main board that drives the entire display module.
Finally, according to the gray-scale current corresponding relation (L) N And I Back of body ' corresponding relation) to control the display module to display. Namely, the backlight current I of the backlight module corresponding to the target gray scale value is adjusted and controlled Back of body The display module can be controlled to display a target brightness value which is in accordance with the preset gamma curve when the target gray-scale value is displayed, so that the gray-scale brightness of the whole display module is consistent with the gray-scale brightness required by the target gamma value.
In addition, in the display of actual display module assembly, backlight module driver chip (BLU IC) or the mainboard of driving whole module assembly can provide different current parameters to being shaded according to the grey scale of difference, and then reach the purpose of accurate gamma value, make the gamma value of every grey scale of module assembly all predetermine gamma value, realize the grey scale display effect of display module assembly preferred.
The gray scale adjusting method of the display module can make the actual gray scale brightness of the module consistent with the gray scale brightness required by the target gamma value by controlling the backlight brightness of the backlight brightness compensation display module, so that the gamma value of each gray scale of the module is the preset gamma value, for example, the preset gamma value is 2.2.
In one embodiment, detecting the display brightness values of the display modules corresponding to the at least two gray-scale values may include: and detecting the display brightness value of the display module corresponding to the gray scale value of 0 and the gray scale value of 255.
Calculating a target brightness value corresponding to any gray scale value according to the detected display brightness value of the display module and a preset gamma curve, and the method comprises the following steps: any gray scale value L N Corresponding target luminance value IL N Can be calculated by the following conditional expression:
wherein L is N Is an arbitrary gray scale value, IL N Is the target brightness value, IL, corresponding to the gray scale value 0 The display brightness value, IL, of the display module corresponding to the gray scale value of 0 255 The display brightness value of the display module corresponding to the gray scale value of 255 is shown.
Referring to fig. 5, in some embodiments, step 04 includes:
041: when the display brightness value of the display module is larger than the target brightness value corresponding to the target gray scale value, the backlight brightness is reduced;
042: and under the condition that the display brightness value of the display module is smaller than the target brightness value corresponding to the target gray scale value, the backlight brightness is increased.
Referring to fig. 2, step 041 and step 042 may be implemented by the brightness adjustment module 14. That is to say, the brightness adjusting module 14 may be configured to reduce the backlight brightness when the display brightness value of the display module is greater than the target brightness value corresponding to the target gray scale value; and under the condition that the display brightness value of the display module is smaller than the target brightness value corresponding to the target gray scale value, increasing the backlight brightness.
Referring to fig. 6, it can be understood that the display luminance value of the display module is a display luminance value corresponding to each gray level of the display module measured when the backlight module is at the preset backlight luminance.
The target gray level L can be calculated according to the formula (2) described above N And the actual measurement display brightness IL of the display module Fruit of N Making a comparison to obtain IL Fruit of N And a target luminance value IL N The magnitude relationship of (a).
Then, according to IL Fruit of N And IL N The size relation of the display module can be adjusted by adjusting the backlight brightness of the backlight module so that the actual measurement display brightness IL of the display module is obtained Fruit of N And a target luminance value IL N And (5) the consistency is achieved.
When IL is used Fruit of N Greater than IL N And when the backlight module is used, the backlight current of the display module is reduced so as to reduce the backlight brightness. When IL is used Fruit of N Is less than IL N Increasing the backlight current value of the display module to increase the backlight brightness until IL Fruit of N Is equal to IL N 。
Specifically, when the display module displays the target gray scale value, the display brightness value of the display module is greater than the target brightness value, and the backlight brightness of the backlight source corresponding to the target gray scale value can be reduced, so that the display brightness value of the display module is equal to the target brightness value. When the display module displays the target gray scale value, the display brightness value of the display module is smaller than the target brightness value, and then the backlight brightness of the backlight source corresponding to the target gray scale value can be increased, so that the display brightness value of the display module is equal to the target brightness value.
The specific way of adjusting the backlight brightness of the backlight module may be adjusting the backlight brightness by adjusting the backlight current or other control parameters of the backlight module, which is not limited herein.
In some embodiments, adjusting the backlight brightness to make the display brightness value of the display module reach the target brightness value corresponding to the gray scale value includes: reducing the backlight current value of the display module to reduce the backlight brightness; or increasing the backlight current value of the display module to increase the backlight brightness.
Specifically, the backlight current of the display module is reduced, namely the current value passing through the backlight module is reduced, so that the backlight brightness is reduced. The backlight current value of the display module is increased, namely the current value passing through the backlight module is increased, so that the backlight brightness is increased.
Referring to fig. 7, in some embodiments, step 06 includes:
061: determining a display gray scale value according to the display signal;
062: determining a display backlight current value according to the corresponding relation between the display gray-scale value and the gray-scale current;
063: and driving the corresponding backlight light source according to the display backlight current value.
Referring to fig. 8, the control module 16 includes a first determining unit 161, a second determining unit 162, and a driving unit 163.
Step 061 may be implemented by the first determining unit 161, step 062 may be implemented by the second determining unit 162, and step 063 may be implemented by the driving unit 163. That is, the first determining unit 161 is configured to determine a display gray-scale value according to the display signal; the second determining unit 162 is configured to determine a display backlight current value according to the display gray-scale value and the gray-scale current corresponding relationship; the driving unit 163 is configured to drive the corresponding backlight light source according to the display backlight current value.
Specifically, the display signal may be a signal with display data, which is a value with gray scale data, input into the display panel by the driving main board. Since the display signal generally carries gray scale information, the display gray scale value can be directly determined according to the display signal.
Then, the display backlight current value corresponding to the display gray scale value can be determined according to the corresponding relation between the display gray scale value and the gray scale current obtained before. For example, if the gray-scale current mapping relationship is the curve shown in fig. 9 and the display gray-scale value is 239 gray-scale, the display backlight current value corresponding to 239 gray-scale can be determined to be 0.88A.
Then, the driving unit 163 may control the backlight current value of the backlight source connected to the corresponding backlight module behind the display module with the pixel gray scale of the display module being 239 gray scales to be 0.88A, so that the target brightness value of the 239 pixel units in the display module is obtained.
It should be noted that, at this time, the number of the backlight light sources in the backlight module is equal to the number corresponding to the pixel units, that is, one backlight light source controls one pixel unit, and 1000 backlight light sources of the backlight module corresponding to 1000 pixel units in the display module are provided. That is, the display module at this time has a plurality of corresponding backlight sources, and one backlight source corresponds to one pixel unit one by one, and the display gray scale value and the corresponding display backlight current value can be determined one by one according to the display signal (as shown in fig. 3).
The following describes how to determine the display gray-scale value (as shown in fig. 10) according to the display signal when the display module has only one corresponding backlight source and one backlight source corresponds to a plurality of pixels. Or, when the display module has a plurality of corresponding backlight sources, and one backlight source corresponds to a plurality of pixels, how to determine the display gray-scale value according to the display signal (as shown in fig. 11).
Referring to fig. 12, in some embodiments, one backlight source corresponds to a plurality of pixel units, and step 061 includes:
0611: calculating target display signals according to display signals of a plurality of pixel units corresponding to the backlight light source;
0612: and determining a display gray scale value according to the target display signal.
Referring to fig. 8, the first determining unit 161 is further configured to calculate a target display signal according to the display signals of the plurality of pixel units corresponding to the backlight light source; and determining a display gray scale value according to the target display signal.
Specifically, when the display module has only one backlight source and one backlight source corresponds to a plurality of pixel units, the total number of the pixel units is 1000, and then one backlight source corresponds to 1000 pixel units.
When the display module has a plurality of backlight sources and one backlight source corresponds to a plurality of pixel units, for example, one backlight source corresponds to 100 pixel units, 1000 pixel units have 10 backlight sources.
Referring to fig. 10 or 11, the target display signal is calculated according to the display signals of the plurality of pixel units corresponding to the backlight source, and it can be understood that, since one pixel unit corresponds to one display signal, an average value of the plurality of display signals can be calculated by taking an arithmetic average or a weighted average of the plurality of display signals, and the average value of the display signals is the target display signal. For example, one backlight source a corresponds to 5 pixel units, and the 5 pixel units are sub-pixel 1, sub-pixel 2, sub-pixel 3, sub-pixel 4, and sub-pixel 5. The display signals of 5 pixel units may be, for example: the gray-scale current displayed by the sub-pixel 1 is 5.1ma, the gray-scale current displayed by the sub-pixel 2 is 5.2ma, the gray-scale current displayed by the sub-pixel 3 is 5.3ma, the gray-scale current displayed by the sub-pixel 4 is 5.4ma, the gray-scale current displayed by the sub-pixel 5 is 5.5ma, and then the current of the backlight light source a is 5.3ma on the average.
Then, a display gray scale value is determined according to the target display signal. That is, the display brightness corresponding to the target display signal can be used as the target display brightness of the display module. The display gray scale values in the target display signal are as follows: red is 246 gray scale, green is 120 gray scale, and blue is 75 gray scale.
Referring to fig. 13, the present application further provides an electronic device 100. The electronic device 100 comprises a processor 110 and a memory 120, the memory 120 is used for storing a computer program 121, and the processor 110 implements the gray scale adjustment method of any one of the above embodiments when executing the computer program 121.
The electronic device 100 of the application can make the actual gray scale brightness of the module consistent with the gray scale brightness required by the target gamma value by controlling the gray scale brightness of the backlight brightness compensation display module.
Referring to fig. 14, the present application also provides a non-volatile computer readable storage medium 200 of a computer program. The computer program 210, when executed by the one or more processors 220, implements the gray scale adjustment method of any of the above embodiments.
The readable storage medium 200 of the present application can make the actual gray-scale brightness of the module consistent with the gray-scale brightness required by the target gamma value by controlling the gray-scale brightness of the backlight brightness compensation display module.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A gray scale adjustment method of a display module is characterized by comprising the following steps:
under the preset backlight brightness, adjusting the driving reference voltage of the display module to enable the gray scale brightness of the display module to accord with a preset gamma curve;
detecting display brightness values of the display modules corresponding to the at least two gray-scale values;
calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve; the target brightness value corresponding to any target gray scale value is calculated according to the following formula:
in the formula, L N To target a gray scale value, IL N Is the target gray level value L N Corresponding target luminance value, L N1 And L N2 For any two gray levels detected, IL N1 For the detected gray level L N1 Display brightness value, IL, of the corresponding display module N2 For the detected gray level L N2 The display brightness value of the corresponding display module is the preset Gamma value of the preset Gamma curve;
under the reference voltage corresponding to the target gray scale value, adjusting the backlight brightness to enable the display brightness value of the display module to reach the target brightness value corresponding to the target gray scale value;
recording each target gray scale value and the corresponding backlight current value to obtain a gray scale current corresponding relation;
and controlling the display module to display according to the gray scale current corresponding relation.
2. The method of claim 1, wherein detecting the display luminance values of the display module corresponding to the at least two gray scale values comprises:
detecting the display brightness value of the display module corresponding to the gray scale value of 0 and the gray scale value of 255;
calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve, and the method comprises the following steps:
the target brightness value corresponding to any target gray scale value is calculated by the following conditional expression:
wherein L is N Is any of the target gray scale values, IL N Is a target luminance value, IL, corresponding to said target gray level value 0 The display brightness value IL of the display module corresponding to the gray scale value 0 255 The display brightness value of the display module corresponding to the gray scale value of 255 is shown.
3. The method of claim 1, wherein the adjusting the backlight brightness to make the display brightness value of the display module reach a target brightness value corresponding to the target gray scale value comprises:
reducing the backlight brightness under the condition that the display brightness value of the display module is greater than the target brightness value corresponding to the target gray scale value;
and under the condition that the display brightness value of the display module is smaller than the target brightness value corresponding to the target gray scale value, increasing the backlight brightness.
4. The method of claim 3, wherein adjusting the backlight brightness to make the display brightness value of the display module reach a target brightness value corresponding to the target gray scale value comprises:
reducing the backlight current value of the display module to reduce the backlight brightness; or
And increasing the backlight current value of the display module to increase the backlight brightness.
5. The gray scale adjustment method of claim 1, wherein recording each target gray scale value and a corresponding backlight current value to obtain a gray scale current correspondence comprises:
and writing the gray scale current corresponding relation into a backlight driving chip or a mainboard of the display module.
6. The gray scale adjustment method of claim 1, wherein controlling the display module to display according to the gray scale current correspondence comprises:
determining a display gray scale value according to the display signal;
determining a display backlight current value according to the display gray scale value and the gray scale current corresponding relation;
and driving the corresponding backlight light source according to the display backlight current value.
7. The method of claim 6, wherein one backlight source corresponds to a plurality of pixel units, and the determining the display gray scale value according to the display signal comprises:
calculating target display signals according to the display signals of the plurality of pixel units corresponding to the backlight light source;
and determining the display gray scale value according to the target display signal.
8. The utility model provides a display module assembly, its characterized in that, display module assembly includes:
the voltage adjusting module is used for adjusting the driving reference voltage of the display module under the preset backlight brightness so as to enable the gray scale brightness of the display module to accord with a preset gamma curve;
the detection module is used for detecting the display brightness values of the display modules corresponding to at least two gray-scale values;
the calculation module is used for calculating a target brightness value corresponding to any target gray scale value according to the detected display brightness value of the display module and a preset gamma curve; the target brightness value corresponding to any target gray scale value is calculated according to the following formula:
in the formula, L N To target gray scale value, IL N Is the target gray level value L N Corresponding target brightness value, L N1 And L N2 For any two gray levels detected, IL N1 For the detected gray level L N1 Display brightness value, IL, of the corresponding display module N2 For the detected gray level L N2 The display brightness value of the corresponding display module is the preset Gamma value of the preset Gamma curve;
the brightness adjusting module is used for adjusting backlight brightness under the reference voltage corresponding to the target gray scale value in sequence to enable the display brightness value of the display module to reach a target brightness value corresponding to the target gray scale value;
the relation determining module is used for recording each target gray scale value and the corresponding backlight current value to obtain a gray scale current corresponding relation;
and the control module is used for controlling the display module to display according to the gray scale current corresponding relation.
9. An electronic device comprising a processor and a memory, the memory storing a computer program which, when executed by the processor, implements the gamma adjustment method of any one of claims 1 to 7.
10. A non-transitory computer-readable storage medium of a computer program, wherein the computer program, when executed by one or more processors, implements the gamma adjustment method of any one of claims 1-7.
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| CN115206247A (en) * | 2022-07-14 | 2022-10-18 | Tcl华星光电技术有限公司 | Display compensation method and liquid crystal display device |
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