WO2024221677A1

WO2024221677A1 - Gamma debugging method, display panel driving method, and readable storage medium

Info

Publication number: WO2024221677A1
Application number: PCT/CN2023/115599
Authority: WO
Inventors: 上官修宁; 李国库; 姜海斌; 王铁钢
Original assignee: 云谷（固安）科技有限公司
Priority date: 2023-04-28
Filing date: 2023-08-29
Publication date: 2024-10-31
Also published as: CN116469334A

Abstract

A gamma debugging method, a display panel driving method, and a readable storage medium. The gamma debugging method comprises: performing gamma debugging according to a target brightness of a first brightness mode, to obtain a data voltage value corresponding to at least one first register value in a first register value range (S101); and according to the data scaling relationship between the first brightness mode and a second brightness mode, determining a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode, wherein the second register value range is at least part of the first register value range (S102). The time and costs of gamma debugging can be reduced, the local brightness of a display panel can be improved, and the display quality of the display panel can be well guaranteed.

Description

Gamma debugging method, display panel driving method and readable storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese patent application 2023104770851, filed on April 28, 2023, entitled “Gamma debugging method, display panel driving method, medium and display device”, and the entire contents of which are incorporated herein by reference.

Technical Field

The present application belongs to the field of display technology, and in particular, relates to a gamma debugging method, a display panel driving method, and a readable storage medium.

Background Art

As the application scenarios of display panels and display devices increase, users have higher and higher requirements for display quality. When users view the content displayed by the display device in an environment with strong ambient light, or when users use the display device to play videos in the High-Dynamic Range (HDR) format, the local brighter areas in the display device require higher brightness to display colors close to the original body, so the display device gradually pays attention to the application of local peak brightness.

However, although the current related solutions can achieve local brightness improvement to a certain extent, the display quality of the display device will be sacrificed, resulting in the optical specifications of the display device not meeting the standards.

Summary of the invention

The embodiments of the present application provide a gamma debugging method, a display panel driving method and a readable storage medium, which can improve the local brightness of the display panel while better ensuring the display quality of the display panel.

In a first aspect, an embodiment of the present application provides a gamma debugging method, which includes: performing gamma debugging according to a target brightness of a first brightness mode to obtain a data voltage value corresponding to at least one first register value in a first register value range; determining a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode according to a data scaling relationship between the first brightness mode and the second brightness mode, the second register value range being at least a portion of the register value range in the first register value range.

In a second aspect, an embodiment of the present application provides a method for driving a display panel, and the method for driving a display panel includes: obtaining image data to be displayed on the display panel; judging whether to turn on a data scaling function based on the image data to be displayed; when the data scaling function is turned on, determining a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode based on a data scaling relationship between a first brightness mode and a second brightness mode, the second register value range being at least a portion of a register value range in a first register value range, and the data voltage values corresponding to each first register value in the first register value range being predetermined.

In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the gamma debugging method provided in the first aspect or the display panel driving method provided in the second aspect are implemented.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the gamma debugging method provided in the first aspect or the display panel driving method provided in the second aspect are implemented.

In a fourth aspect, an embodiment of the present application provides a display device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the gamma debugging method provided in the first aspect or the display panel driving method provided in the second aspect.

The gamma debugging method, display panel driving method and readable storage medium of the embodiment of the present application, for the first brightness mode and the second brightness mode, only the first brightness mode is gamma debugged to obtain the data voltage value corresponding to at least one first register value in the first register value range corresponding to the first brightness mode, and then the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode is directly obtained through the data scaling relationship between the first brightness mode and the second brightness mode, and the second register value range is at least part of the register value range in the first register value range. In this way, on the one hand, the first brightness mode and the second brightness mode are only gamma debugged once, which reduces the time and cost of gamma debugging; on the other hand, for example, when switching to the first brightness mode, the sub-pixel can be directly driven to emit light with the data voltage value corresponding to at least one first register value in the first register value range, so as to improve the local brightness of the display panel without weakening the IR drop compensation of the display panel, thereby better ensuring the display quality of the display panel and making the optical specifications of the display panel meet the standards. On the other hand, for example, when switching to the second brightness mode, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode can be directly obtained according to the data scaling relationship between the first brightness mode and the second brightness mode, and the data voltage value corresponding to at least one second register value in the second register value range can be used to drive the sub-pixel to emit light, thereby meeting the display requirements of the second brightness mode.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

FIG1 schematically shows a full-screen white picture and a partial white picture;

FIG2 schematically shows a full-screen white picture, a full-screen red picture, a full-screen green picture and a full-screen blue picture;

FIG3 is a flow chart of a gamma debugging method provided in an embodiment of the present application;

FIG4 is another schematic flow chart of a gamma debugging method provided in an embodiment of the present application;

FIG5 is a flow chart of step S102 in the gamma debugging method provided in an embodiment of the present application;

FIG6 is another schematic flow chart of a gamma debugging method provided in an embodiment of the present application;

FIG7 schematically shows a first test picture and a second test picture;

FIG8 is a schematic diagram of another flow chart of the gamma debugging method provided in an embodiment of the present application;

FIG9 is a schematic diagram of another flow chart of the gamma debugging method provided in an embodiment of the present application;

FIG10 is a flow chart of step S604 in the gamma debugging method provided in an embodiment of the present application;

FIG. 11 is a schematic diagram of an operation of step S604 in the gamma debugging method provided in an embodiment of the present application;

FIG12 is a schematic diagram of a flow chart of a method for driving a display panel provided in an embodiment of the present application;

FIG13 is another schematic flow chart of a method for driving a display panel provided in an embodiment of the present application;

FIG14 is a schematic diagram of a structure of a gamma debugging device provided in an embodiment of the present application;

FIG15 is a schematic structural diagram of a driving device for a display panel provided in an embodiment of the present application;

FIG. 16 shows a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application.

DETAILED DESCRIPTION

It should be understood that the term "and/or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

As the application scenarios of display panels and display devices increase, users have higher and higher requirements for display quality. When a user views the content displayed by a display device in an environment with strong ambient light, or when a user uses a display device When playing videos in High-Dynamic Range (HDR) format, the brighter local areas in the display device require higher brightness to display colors close to the original color. Therefore, the display device gradually pays attention to the application of local peak brightness.

However, current related solutions usually focus on weakening the IR drop compensation of the display panel. Although weakening the IR drop compensation of the display panel can achieve local brightness increase to a certain extent, it will sacrifice the display quality of the display panel, resulting in the optical specifications of the display panel not meeting the standards.

FIG1 schematically shows a full-screen white picture and a partial white picture. FIG2 schematically shows a full-screen white picture, a full-screen red picture, a full-screen green picture, and a full-screen blue picture. For example, as shown in FIG1, by weakening the IR drop compensation of the display panel, although the local brightness of the display panel can be improved, the difference between the brightness of the full-screen white picture 101 and the brightness of the partial white picture 102 under the same or similar data voltage will be large. For example, the deviation between the average brightness LV1 of the white area in the partial white picture 102 and the average brightness LV2 of the full-screen white picture 101 will be greater than 10%, and the expression is as follows:

As shown in FIG. 2 , in addition, by weakening the IR drop compensation of the display panel, the deviation between the brightness of the full-screen white picture 101 and the sum of the brightness of the full-screen red picture 201 , the full-screen green picture 202 and the full-screen blue picture 203 under the same or similar data voltage is greater than 10%, and the expression is as follows:

Among them, LV2 represents the average brightness of the full-screen white picture 101, LVR represents the average brightness of the full-screen red picture 201, LVG represents the average brightness of the full-screen green picture 202, and LVB represents the average brightness of the full-screen blue picture 203.

In view of the above research findings of the inventors, the embodiments of the present application provide a gamma debugging method, a display panel driving method and a readable storage medium, which can solve the technical problem existing in the related art that improving the local brightness of the display panel will cause the optical specifications of the display panel to not meet the standards.

The technical concept of the embodiments of the present application is that the first brightness mode is a brightness mode corresponding to improving the local brightness. For the first brightness mode and the second brightness mode, only the first brightness mode is gamma-adjusted to obtain a data voltage value corresponding to at least one first register value in a first register value range corresponding to the first brightness mode, and then a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode is directly obtained through a data scaling relationship between the first brightness mode and the second brightness mode, and the second register value range is at least a partial register value range in the first register value range.

In this way, on the one hand, the first brightness mode and the second brightness mode only need to perform gamma debugging once, which reduces the time and cost of gamma debugging; on the other hand, for example, when switching to the first brightness mode, the sub-pixel can be directly driven to emit light with a data voltage value corresponding to at least one first register value in the first register value range, thereby improving the local brightness of the display panel without weakening the IR drop compensation of the display panel, thereby better ensuring the display quality of the display panel. On the other hand, for example, when switching to the second brightness mode, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode can be directly obtained according to the data scaling relationship between the first brightness mode and the second brightness mode, and the data voltage value corresponding to at least one second register value in the second register value range is used to drive the sub-pixel to emit light, so as to meet the display requirements of the second brightness mode.

The following first introduces the gamma debugging method provided in the embodiment of the present application.

Fig. 3 is a flow chart of a gamma adjustment method provided by an embodiment of the present application. As shown in Fig. 3, the gamma adjustment method may include the following steps S101 and S102.

S101 . Perform gamma adjustment according to a target brightness of a first brightness mode to obtain a data voltage value corresponding to at least one first register value in a first register value range.

The first brightness mode may be a brightness mode corresponding to enhancing the local brightness of the display panel. For ease of understanding, the first brightness mode may be referred to as the average picture level (APL) mode, that is, when the APL meets the preset conditions, the first brightness mode is started. In some examples, for example, APL may be understood as the percentage value of the pixel area displaying white color to all pixel areas in the display panel after the color image to be displayed is converted into a grayscale image.

The target brightness of the first brightness mode can be predetermined, for example, the first brightness mode includes multiple grayscales, and the target brightness corresponding to each grayscale is known. According to the target brightness of multiple grayscales in the first brightness mode, gamma adjustment can be performed, and then a data voltage value corresponding to at least one first register value in the first register value range corresponding to the first brightness mode can be obtained.

In practical applications, the first register value range may include multiple different first register values, and the first register value may be any register value in the first register value range, such as first register value a1, first register value a2, ..., first register value an. Different first register values may correspond to different data voltage values, which is not limited in the embodiments of the present application.

In some specific examples, the first register value range can be a register value range of 51 registers. Taking 12 bits as an example, for example, the first register value range can be 0 to 4095. If the first register value range is 0 to 4095, the first register value range includes 4096 first register values. The 4096 first register values can correspond to 0 to 255 grayscales respectively, for example, 1 grayscale corresponds to 16 first register values. For example, 0 grayscale can correspond to 0 to 15 first register values, and 1 grayscale can correspond to 16 to 31 first register values. During gamma debugging, after obtaining the data voltage values corresponding to each grayscale, according to the first correspondence between the grayscale corresponding to the first brightness mode and the first register value, the data voltage values corresponding to each first register value in the first register value range can be obtained. The specific process will be described in detail below, so I will not go into details here.

S102. Determine, based on a data scaling relationship between the first brightness mode and the second brightness mode, a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode, wherein the second register value range is at least a portion of the register value range in the first register value range.

Among them, the second brightness mode can be a highlight display mode (High Brightness Monitor, HBM), which is the display mode of the display panel when the display panel automatically adjusts the brightness and the external light is strong, or the display mode of the display panel when the user manually adjusts the brightness of the display panel to the maximum. The first brightness mode can be regarded as a brightness mode corresponding to further improving the local brightness on the basis of the second brightness mode. For example, in the second brightness mode, if the APL meets the preset conditions, the first brightness mode is started.

At present, display panels usually have a data scaling function, through which the data corresponding to a large brightness range can be scaled to the data corresponding to a small brightness range. For example, the large brightness range of 0-1200nit corresponds to 0-255 grayscales, and the small brightness range of 0-1000nit corresponds to 0-255 grayscales. After the gamma adjustment is completed, the brightness corresponding to each grayscale of 0-1200nit is determined. After Data Scaling is turned on, the 255 grayscales in the small brightness range directly correspond to the c grayscale before turning on. For example, the c grayscale is the 235 grayscale corresponding to the large brightness range. Then, the brightness corresponding to the 0-255 grayscales after turning on corresponds to the 0-c grayscale before turning on, and the brightness of each grayscale after turning on is equal to the brightness corresponding to the corresponding grayscale before turning on, and the data voltage value corresponding to each grayscale after turning on is equal to the data voltage value corresponding to the corresponding grayscale before turning on. For example, the data voltage value corresponding to the 255 grayscales in the small brightness range is equal to the data voltage value corresponding to the 235 grayscales in the large brightness range.

In an embodiment of the present application, the data scaling relationship between the first brightness mode and the second brightness mode includes but is not limited to the scaling relationship between the grayscale in the first brightness mode and the grayscale in the second brightness mode, or the scaling relationship between the register value in the first brightness mode and the register value in the second brightness mode.

There is a data scaling relationship between the first brightness mode and the second brightness mode. Then, when the data voltage value corresponding to at least one first register value in the first register value range is known, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode can be obtained according to the data scaling relationship.

In some specific examples, the second register value range may also be a register value range of 51 registers. Taking 12 bits as an example, the second register value range may be 0 to 3775. Since the data voltage values corresponding to each first register value in the first register value range 0 to 4095 are known, the data voltage values corresponding to each second register value in the second register value range 0 to 3775 may also be known. For example, the data voltage value corresponding to 3775 in the second register value range is equal to the data voltage value corresponding to 3775 in the first register value range.

The gamma debugging method of the embodiment of the present application, for the first brightness mode and the second brightness mode, only performs gamma debugging on the first brightness mode, obtains the data voltage value corresponding to at least one first register value in the first register value range corresponding to the first brightness mode, and then directly obtains the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode through the data scaling relationship between the first brightness mode and the second brightness mode, and the second register value range is at least a part of the register value range in the first register value range. In this way, on the one hand, the first brightness mode and the second brightness mode are only gamma debugged once, which reduces the time and cost of gamma debugging; on the other hand, for example, when switching to the first brightness mode, the sub-pixel can be directly driven to emit light with the data voltage value corresponding to at least one first register value in the first register value range, so as to improve the local brightness of the display panel. The brightness can be increased without weakening the IR drop compensation of the display panel, thereby better ensuring the display quality of the display panel and meeting the optical specifications of the display panel. On the other hand, for example, when switching to the second brightness mode, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode can be directly obtained according to the data scaling relationship between the first brightness mode and the second brightness mode, and the data voltage value corresponding to at least one second register value in the second register value range can be used to drive the sub-pixel to emit light, which can meet the display requirements of the second brightness mode.

The specific implementation methods of the above steps are introduced below.

First, S101 is introduced, performing gamma adjustment according to the target brightness of the first brightness mode to obtain a data voltage value corresponding to at least one first register value in the first register value range.

Fig. 4 is a flow chart of step S101 in the gamma debugging method provided in an embodiment of the present application. As shown in Fig. 4, according to some embodiments of the present application, optionally, S101 may specifically include the following steps S401 to S406.

S401. Select multiple grayscales in a preset grayscale range as grayscale binding points.

The preset grayscale range can be flexibly adjusted according to actual conditions, for example, grayscales of 0 to 255. In S401, multiple grayscales can be selected as grayscale binding points. For example, in some examples, 8 grayscales or other numbers of grayscales can be selected as grayscale binding points.

S402: Determine the target brightness corresponding to each grayscale binding point according to a predetermined correspondence relationship between grayscale and brightness.

The predetermined correspondence between grayscale and brightness includes but is not limited to the Gamma2.2 curve. The Gamma2.2 curve is a curve of the relationship between grayscale and brightness, and the target brightness corresponding to each grayscale binding point can be queried through the Gamma2.2 curve.

S403 . For any grayscale binding point, obtain the actually measured brightness when the display panel displays the grayscale picture corresponding to the grayscale binding point.

For example, for any i-th grayscale binding point, the grayscale picture corresponding to the i-th grayscale binding point can be output to the display panel through the lighting machine, and the display panel displays the grayscale picture corresponding to the i-th grayscale binding point. Then, the measured brightness when the display panel displays the grayscale picture corresponding to the i-th grayscale binding point is collected through optical testing equipment such as a color analyzer or a camera. Where i is a positive integer.

S404. When the difference between the measured brightness corresponding to the grayscale binding point and the target brightness corresponding to the grayscale binding point is greater than or equal to the preset error threshold, adjust the data voltage value corresponding to the sub-pixel in the display panel until the difference between the measured brightness corresponding to the grayscale binding point and the target brightness corresponding to the grayscale binding point is less than the preset error threshold, thereby obtaining the data voltage value corresponding to the grayscale binding point.

The preset error threshold can be flexibly adjusted according to actual conditions, and the embodiments of the present application do not limit this. For any i-th grayscale binding point, when the difference between the measured brightness corresponding to the i-th grayscale binding point and the target brightness corresponding to the i-th grayscale binding point is greater than or equal to the preset error threshold, the data voltage value corresponding to the sub-pixel in the display panel can be adjusted until the measured brightness corresponding to the i-th grayscale binding point is equal to the target brightness corresponding to the i-th grayscale binding point. The difference between the brightness is less than the preset error threshold, and the data voltage value corresponding to the i-th grayscale binding point is obtained.

Here, since the display panel includes multiple color sub-pixels, when adjusting the data voltage values corresponding to the sub-pixels in the display panel, the data voltage value corresponding to at least one color sub-pixel in the display panel can be adjusted so that the difference between the measured brightness corresponding to the i-th grayscale binding point and the target brightness corresponding to the i-th grayscale binding point is less than the preset error threshold. Accordingly, the data voltage value corresponding to the i-th grayscale binding point can, for example, include the data voltage value of the first color sub-pixel corresponding to the i-th grayscale binding point, the data voltage value of the second color sub-pixel corresponding to the i-th grayscale binding point, and the data voltage value of the third color sub-pixel corresponding to the i-th grayscale binding point. Exemplarily, the first color can be red, the second color can be green, and the third color can be blue. The data voltage values corresponding to different color sub-pixels can be different.

S405 , based on a linear interpolation algorithm and according to the data voltage values corresponding to the plurality of grayscale binding points, obtain the data voltage value corresponding to each grayscale in the grayscale range.

After obtaining the data voltage values corresponding to the plurality of grayscale binding points, the data voltage values corresponding to the non-grayscale binding points in the grayscale range can be obtained based on a linear interpolation algorithm, thereby obtaining the data voltage values corresponding to each grayscale in the grayscale range.

S406 , obtaining data voltage values corresponding to each first register value in the first register value range according to a first corresponding relationship between a grayscale corresponding to the first brightness mode and a first register value and data voltage values corresponding to each grayscale in the grayscale range.

Among them, in the first corresponding relationship, a grayscale in the grayscale range may correspond to at least one first register value in the first register value range. For example, in some examples, a grayscale in the grayscale range of 0 to 255 may correspond to 16 first register values in the first register value range of 0 to 4095, such as grayscale 0 corresponding to first register values 0 to 15. After obtaining the data voltage value corresponding to each grayscale, according to the first corresponding relationship between the grayscale corresponding to the first brightness mode and the first register value, the data voltage value corresponding to each first register value in the first register value range can be obtained.

S102 is introduced below. According to the data scaling relationship between the first brightness mode and the second brightness mode, a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode is determined, and the second register value range is at least a partial register value range in the first register value range.

Fig. 5 is another flow chart of the gamma debugging method provided by an embodiment of the present application. As shown in Fig. 5, according to some embodiments of the present application, optionally, before S102, the gamma debugging method may further include the following steps S501 and S502.

S501: Determine a first grayscale corresponding to the maximum brightness in the second brightness mode in the first brightness mode.

Among them, the maximum brightness in the second brightness mode is known and can be flexibly adjusted according to actual conditions. For example, in some examples, the maximum brightness in the second brightness mode is 1000nit. It should be noted that 1000nit is only an example and does not constitute a limitation on the embodiments of the present application. After gamma adjustment, the brightness corresponding to each grayscale in the first brightness mode is known. Then, in some examples, the second brightness mode can be determined by looking up a table. The first grayscale corresponding to the maximum brightness in the first brightness mode, for example, the first grayscale corresponding to 1000 nit in the first brightness mode can be queried, for example, grayscale 235. That is, the maximum brightness in the second brightness mode corresponds to grayscale 235 in the first brightness mode.

In some other examples, the first grayscale can also be obtained by calculation, and the expression is as follows:

Wherein, L _1max and L _2max are known, L _1max represents the maximum brightness in the first brightness mode, L _2max represents the maximum brightness in the second brightness mode, and G represents the first grayscale. For example, in some examples, L _1max = 1200nit, L _2max = 1000nit.

In this way, the first grayscale corresponding to the maximum brightness in the second brightness mode in the first brightness mode can be directly calculated by calculation, which reduces the table lookup time and improves the rate of determining the first grayscale.

S502: Calculate the maximum register value in the second brightness mode according to the first grayscale to obtain a second register value range.

For example, the maximum register value in the second brightness mode can be calculated according to the following expression:

Q _2max =G*2 ^a +b (4)

Wherein, Q _2max represents the maximum register value in the second brightness mode, G represents the first grayscale, a represents the preset index, and b represents the preset deviation value. In some examples, for example, a=4, b=15. Taking G=235 grayscale as an example, Q _2max =3775 can be obtained through the above expression (4).

The minimum register value in the second brightness mode is, for example, 0. After obtaining the maximum register value Q _2max in the second brightness mode, the second register value range can be determined to be 0 to Q _2max . One second register value corresponds to one second register value. In this way, the second register value range can be determined.

According to some embodiments of the present application, optionally, S102, based on the data scaling relationship between the first brightness mode and the second brightness mode, determines a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode, which may specifically include the following steps one and two.

Step 1: Divide the second register value range into a first number of second register values according to a first number of first register values in the first register value range.

Among them, the first number can be flexibly adjusted according to actual conditions, and the embodiments of the present application do not limit this. For example, in some examples, the first register value range is divided into 4096 first register values, and the 4096 first register values correspond to 0 to 255 grayscales respectively. Then, in order to make the second register value correspond to 0 to 255 grayscales, the second register value range can also be divided into an equal number (such as 4096) of second register values. The 4096 second register values correspond to 0 to 255 grayscales respectively, for example, one grayscale can correspond to 16 second register values.

Table 1 schematically shows the second register value range.

Table 1

As shown in Table 1, the maximum original grayscale of the second brightness mode is 255 grayscale, which is changed to 235 grayscale in the first brightness mode after Data Scaling. The second register value range of 0 to 3775 can be divided into 4096 second register values, corresponding to 0 to 255 grayscales respectively.

For example, the second register value corresponding to each serial number can be determined by the following expression:

Wherein, x represents the serial number, and Q _2x represents the second register value corresponding to the serial number x. It should be noted that when the value calculated by expression (5) is not an integer, it can be rounded off to ensure that the second register value corresponding to the serial number x is an integer.

Step 2: for any second register value, determine the data voltage value corresponding to the second register value according to the data voltage value corresponding to the first register value that is the same as the second register value in the first register value range.

For example, for the second register value corresponding to the second register value 3775, the data voltage value corresponding to the second register value can be determined according to the data voltage value corresponding to the first register value 3775 in the first register value range of 0 to 4095.

Since the data voltage values corresponding to each first register value in the first register value range are known, for any second register value, the data voltage value corresponding to the second register value can be determined based on the data voltage value corresponding to the first register value that is the same as the second register value in the first register value range.

In this way, after obtaining the data voltage values corresponding to each first register value in the first register value range, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode is directly obtained according to the data scaling relationship between the first brightness mode and the second brightness mode, and the data voltage value corresponding to at least one second register value in the second register value range is used to drive the sub-pixel to emit light, which can meet the display requirements of the second brightness mode, and the first brightness mode and the second brightness mode only need to perform gamma debugging once, which can reduce the time and cost of gamma debugging.

Since the embodiment of the present application can improve the local brightness without weakening the IR drop compensation of the display panel, the embodiment of the present application can perform IR drop compensation on the display panel to further improve the display quality of the display panel so that the optical specifications of the display panel meet the standards.

Fig. 6 is another flow chart of the gamma debugging method provided by an embodiment of the present application. As shown in Fig. 6, according to some embodiments of the present application, optionally, the gamma debugging method may further include the following steps S601 to S604.

S601 : Acquire a first brightness when a display panel displays a first test picture and a second brightness when a display panel displays a second test picture.

Among them, the first test picture is a full-screen target grayscale picture, and the second test picture is a local area display target grayscale picture. Among them, the target grayscale can be any grayscale, which can be flexibly adjusted according to actual conditions. Figure 7 schematically shows the first test picture and the second test picture. As shown in Figure 7, for example, the first test picture can be a full-screen 255 grayscale picture, such as a full-screen white picture. The second test picture can be a local area display 255 grayscale picture, such as a local area display white picture. The local area can be any partial area in the display panel, such as including but not limited to the central area in the display panel.

The first brightness may specifically be an average brightness when the display panel displays the first test picture, and the second brightness may specifically be an average brightness of a white area when the display panel displays the second test picture.

S602. When the difference between the first brightness and the second brightness is greater than or equal to a first preset threshold, adjust the data voltage value corresponding to the sub-pixel in the local area of the display panel when displaying the second test screen until the difference between the first brightness and the second brightness is less than the first preset threshold, thereby obtaining the adjusted data voltage value.

Among them, the first preset threshold value can be flexibly adjusted, and the embodiments of the present application do not limit this. When the difference between the first brightness and the second brightness is greater than or equal to the first preset threshold value, it means that the deviation between the full screen brightness and the local area brightness caused by IR drop is large, and IR drop compensation is required. Specifically, the data voltage value corresponding to the sub-pixel in the local area of the display panel when displaying the second test screen can be adjusted until the difference between the first brightness and the second brightness is less than the first preset threshold value, and the adjusted data voltage value is obtained.

S603 : Determine first compensation data of the data voltage value according to the data voltage value before adjustment and the data voltage value after adjustment.

For example, in some examples, the first compensation data may be a voltage difference value, and the first compensation data of the data voltage value may be obtained by calculating the difference between the data voltage value before adjustment and the data voltage value after adjustment.

Of course, in other examples, the first compensation data may also be a voltage ratio, and the first compensation data of the data voltage value may be obtained by calculating the ratio between the data voltage value before adjustment and the data voltage value after adjustment. This embodiment of the present application is not limited to this.

It should be noted that the first compensation data of the data voltage values corresponding to different color sub-pixels in the display panel may be different, and the first compensation data of the data voltage values corresponding to various color sub-pixels may be determined based on the difference or quotient of the data voltage values before adjustment of the various color sub-pixels and the data voltage values after adjustment of the various color sub-pixels.

S604: When in the first brightness mode and/or the second brightness mode, adjust the data voltage value according to the first compensation data.

That is, in both the first brightness mode and the second brightness mode, the data voltage value can be adjusted according to the first compensation coefficient.

Thus, by performing IR drop compensation on the display panel, for example, the IR drop under the same or similar data voltage can be reduced. The difference between the brightness of the full-screen target grayscale image and the brightness of the local area target grayscale image can also narrow the difference between the brightness of the full-screen white image and the sum of the brightness of the full-screen red image, the full-screen green image and the full-screen blue image, further improving the display quality of the display panel and meeting the optical specifications of the display panel.

In some specific embodiments, S604 may specifically include adjusting the data voltage value according to the first compensation data when the first brightness mode and/or the second brightness mode and the image data to be displayed by the display panel meets a preset condition.

For example, whether it is the first brightness mode or the second brightness mode, when the image data to be displayed on the display panel is only brighter in a local area, the data voltage values corresponding to the various color sub-pixels can be adjusted respectively according to the first compensation data of the data voltage values corresponding to the various color sub-pixels.

For example, in some specific embodiments, the preset conditions may include that the number of first sub-pixels is less than a second preset threshold or the number of second sub-pixels is greater than or equal to a third preset threshold, the first sub-pixels are sub-pixels whose corresponding grayscale is greater than or equal to the preset grayscale threshold, and the second sub-pixels are sub-pixels whose corresponding grayscale is less than the preset grayscale threshold.

Among them, the second preset threshold, the third preset threshold and the preset grayscale threshold can be flexibly adjusted according to actual conditions, and the embodiments of the present application do not limit this. The first sub-pixel is a brighter sub-pixel, and the second sub-pixel is a darker sub-pixel. When the brighter sub-pixel is lower than a certain number or the darker sub-pixel is higher than a certain number, IR drop compensation is triggered, and the data voltage value is adjusted according to the first compensation data.

In this way, on the basis of improving local brightness, by performing IR drop compensation on the display panel, for example, the difference between the brightness of the full-screen target grayscale image and the brightness of the local area target grayscale image under the same or similar data voltage can be reduced, thereby further improving the display quality of the display panel and meeting the optical specifications of the display panel.

It should be noted that the grayscales corresponding to the first test picture and the second test picture can be changed, and the size of the local area in the second test picture can also be changed. The above steps S601 to S604 can be performed multiple times to obtain the first compensation data of the data voltage values corresponding to different grayscales and the first compensation data of the data voltage values corresponding to different sizes of the local area.

According to some embodiments of the present application, optionally, IR drop compensation can also include brightness compensation between the brightness of a full-screen white picture and the sum of the brightness of a full-screen red picture, a full-screen green picture, and a full-screen blue picture.

Fig. 8 is another flow chart of the gamma debugging method provided by the embodiment of the present application. As shown in Fig. 8, according to some embodiments of the present application, optionally, the gamma debugging method may further include the following steps S801 to S805.

S801, obtaining a first brightness when the display panel displays a first test picture, a first sub-brightness when the display panel displays a third test picture, a second sub-brightness when the display panel displays a fourth test picture, and a third sub-brightness when the display panel displays a fifth test picture.

Among them, the first test picture is a full-screen target grayscale picture, such as a full-screen white picture, the third test picture is a full-screen first color picture corresponding to the target grayscale, the fourth test picture is a full-screen second color picture corresponding to the target grayscale, and the fifth test picture is a full-screen third color picture corresponding to the target grayscale.

S802: Calculate the sum of the first sub-brightness, the second sub-brightness, and the third sub-brightness.

S803, when the difference between the first brightness and the sum value is greater than or equal to a fourth preset threshold, adjusting the sub-pixel corresponding to the display panel when displaying at least one of the third test picture, the fourth test picture, and the fifth test picture The data voltage value is adjusted until the difference between the first brightness and the second brightness is less than the first preset threshold and the difference between the first brightness and the sum value is less than the fourth preset threshold, to obtain the adjusted data voltage value.

That is to say, for the target grayscale, it can also be ensured that the difference between the first brightness and the first sub-brightness, and the sum of the second sub-brightness and the third sub-brightness is less than the fourth preset threshold, thereby obtaining the adjusted data voltage value corresponding to the target grayscale.

S804 , determining second compensation data of the data voltage value according to the data voltage value before adjustment and the data voltage value after adjustment.

S805 . When in the first brightness mode and/or the second brightness mode, adjust the data voltage value according to the second compensation data.

The specific process of S804 and S805 is similar to the specific process of the above steps S603 and S604. Please refer to the above and will not be repeated here.

In some embodiments, the gamma debugging method may include the above steps S601 to S604 and may also include the above steps S801 to S805.

In this way, on the basis of improving the local brightness, by performing IR drop compensation on the display panel, for example, the difference between the brightness of the full-screen target grayscale picture and the brightness of the local area target grayscale picture under the same or similar data voltage can be reduced, and the difference between the brightness of the full-screen white picture and the sum of the brightness of the full-screen red picture, the full-screen green picture and the full-screen blue picture can also be reduced, thereby further improving the display quality of the display panel and meeting the optical specifications of the display panel.

Fig. 9 is another flow chart of a gamma debugging method provided by an embodiment of the present application. As shown in Fig. 9, according to some embodiments of the present application, optionally, the gamma debugging method may further include the following steps S901 and S902.

S901. When the display panel is in a first brightness mode, drive a sub-pixel in the display panel to emit light according to a data voltage value corresponding to at least one first register value in a first register value range.

In the first brightness mode, for each sub-pixel, the first register value corresponding to the gray scale to be displayed by each sub-pixel can be determined according to the gray scale to be displayed by each sub-pixel and the first corresponding relationship between the gray scale and the first register value, and then the data voltage value corresponding to the first register value of each sub-pixel can be determined to drive each sub-pixel to emit light.

S902 . When the display panel is in the second brightness mode, drive a sub-pixel in the display panel to emit light according to a data voltage value corresponding to at least one second register value in the second register value range.

In the second brightness mode, for each sub-pixel, the second register value corresponding to the gray scale to be displayed by each sub-pixel can be determined according to the gray scale to be displayed by each sub-pixel and the second corresponding relationship between the gray scale and the second register value, and then the data voltage value corresponding to the second register value of each sub-pixel can be determined to drive each sub-pixel to emit light.

In some specific embodiments, the display panel may enter the first brightness mode based on the second brightness mode. Specifically, when the display panel meets the first preset condition, the data scaling function is turned on, and the display panel switches to the first brightness mode. Switch to the second display mode. Wherein, the first preset condition includes: the automatically detected external light intensity is greater than or equal to the preset brightness threshold or the user receives an instruction to switch to the second brightness mode. Exemplarily, the instruction for the user to switch to the second brightness mode may include, for example, the user adjusting the brightness progress bar to the maximum brightness. When the display panel is in the second brightness mode and meets the second preset condition, the data zoom function is turned off and the display panel switches to the first display mode. Wherein, the first preset condition includes: the number of the first sub-pixel is less than the fifth preset threshold or the second sub-pixel is greater than or equal to the sixth preset threshold, the first sub-pixel is a sub-pixel whose corresponding grayscale is greater than or equal to the preset grayscale threshold, and the second sub-pixel is a sub-pixel whose corresponding grayscale is less than the preset grayscale threshold. The fifth preset threshold, the sixth preset threshold and the preset grayscale threshold can be flexibly adjusted according to actual conditions, and the embodiment of the present application does not limit this. That is, when the display panel is in the second brightness mode, if the number of brighter sub-pixels is less than a certain number or the number of darker sub-pixels is higher than a certain number, the display panel enters the first display mode.

It should be noted that the fifth preset threshold may be different from the second preset threshold mentioned above, and the sixth preset threshold may be different from the third preset threshold mentioned above, and the embodiment of the present application is not limited to this.

Fig. 10 is a flow chart of step S604 in the gamma debugging method provided in an embodiment of the present application. As shown in Fig. 10, according to some embodiments of the present application, optionally, in S604, when in the first brightness mode and/or the second brightness mode, adjusting the data voltage value according to the first compensation data may specifically include the following steps S1001 and S1002.

S1001. Determine third compensation data corresponding to a current register value of a display panel according to a predetermined correspondence relationship between a register value and compensation data.

FIG11 is an operation diagram of step S604 in the gamma debugging method provided by an embodiment of the present application. As shown in FIG11 , after acquiring the image data to be displayed on the display panel, it is first determined whether the number of the first sub-pixels is less than the second preset threshold or whether the number of the second sub-pixels is greater than or equal to the third preset threshold. If the number of the first sub-pixels is less than the second preset threshold or the number of the second sub-pixels is greater than or equal to the third preset threshold, the IR drop compensation is triggered, and the corresponding first compensation data is determined according to the number of the first sub-pixels. That is, the first compensation data corresponding to the different sizes of the local areas mentioned above (or the different numbers of the first sub-pixels) may be different. At the same time, the current brightness level of the display panel is determined, which can be determined specifically by querying the current brightness level (i.e., the current progress) of the brightness progress bar adjusted by the user. In order to achieve refined compensation, different brightness levels can correspond to different third compensation data, and the third compensation data corresponding to each brightness level can be predetermined. That is, according to the correspondence between the predetermined brightness level and the compensation data, the third compensation data corresponding to the current brightness level of the display panel can be determined.

S1002: Adjust the data voltage value according to the first compensation data and the third compensation data.

According to the determined first compensation data and the third compensation data corresponding to the current brightness level, the data voltage value of the sub-pixel is adjusted. For example, when the first compensation data and the third compensation data are both voltage difference values, the data voltage value, the sum of the first compensation data and the third compensation data can be calculated to adjust the data voltage value. For example, when the first compensation data and the third compensation data are both voltage ratio values, the data voltage value, the sum of the first compensation data and the third compensation data can be calculated. The product of the compensation data and the third compensation data is used to adjust the data voltage value.

In this way, on the basis of the first compensation data, the third compensation data corresponding to the current brightness level of the display panel is further determined, and the data voltage value of the sub-pixel is adjusted according to the first compensation data and the third compensation data, which fully considers the influence of the brightness level on the IR drop compensation, realizes more refined IR drop compensation, and greatly improves the display quality of the display panel, so that the optical specifications of the display panel meet the standards.

Similarly, in other embodiments, the data voltage value may also be adjusted according to the second compensation data and the third compensation data. The process is similar to the above step S1002 and will not be described in detail herein.

Based on the same technical concept as the gamma adjustment method provided in the above embodiment, the embodiment of the present application further provides a method for driving a display panel. Please refer to the following embodiment.

FIG12 is a schematic diagram of a flow chart of a method for driving a display panel provided in an embodiment of the present application. As shown in FIG12 , the method for driving a display panel may include the following steps:

S1201, obtaining image data to be displayed on a display panel;

S1202, judging whether to enable a data zoom function according to the image data to be displayed;

S1203. When the data scaling function is turned on, determine the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode according to the data scaling relationship between the first brightness mode and the second brightness mode, the second register value range is at least a partial register value range in the first register value range corresponding to the first brightness mode, and the data voltage values corresponding to each first register value in the first register value range are predetermined.

The specific implementation process of the above steps S1201 to S1203 can be found above and will not be repeated here.

In the driving method of the display panel of the embodiment of the present application, on the one hand, the first brightness mode and the second brightness mode only need to perform gamma debugging once, thereby reducing the time and cost of gamma debugging; on the other hand, for example, when switching to the first brightness mode, the data voltage value corresponding to at least one first register value in the first register value range can be directly used to drive the sub-pixel to emit light, thereby improving the local brightness of the display panel without weakening the IR drop compensation of the display panel, thereby better ensuring the display quality of the display panel and making the optical specifications of the display panel meet the standards. On the other hand, for example, when switching to the second brightness mode, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode can be directly obtained according to the data scaling relationship between the first brightness mode and the second brightness mode, and the data voltage value corresponding to at least one second register value in the second register value range can be used to drive the sub-pixel to emit light, thereby meeting the display requirements of the second brightness mode.

FIG13 is another schematic flow chart of a method for driving a display panel provided in an embodiment of the present application. As shown in FIG13 , according to some embodiments of the present application, optionally, the method for driving a display panel may further include the following steps:

S1301. When the data scaling function is turned on, for any sub-pixel, the second target register value corresponding to the gray scale to be displayed by the sub-pixel is determined according to the second corresponding relationship between the gray scale corresponding to the second brightness mode and the second register value, the second data voltage value corresponding to the second target register value is determined according to the corresponding relationship between the second register value and the data voltage value, and the sub-pixel is driven to emit light based on the second data voltage value.

That is to say, in the second brightness mode, the sub-pixel can be driven to emit light according to the data voltage value corresponding to the second register value.

Continuing to refer to FIG. 13 , according to some embodiments of the present application, optionally, S1202, judging whether to enable the data zoom function according to the image data to be displayed, may specifically include the following steps:

When the image data to be displayed meets the first preset condition, the data zoom function is enabled.

Among them, the image data includes the grayscale to be displayed by each sub-pixel in the display panel, and the first preset condition includes: the automatically detected external light intensity is greater than or equal to the preset brightness threshold or the user's instruction to switch to the second brightness mode is received, and/or the number of first sub-pixels is greater than or equal to the fifth preset threshold or the second sub-pixels are less than the sixth preset threshold, the first sub-pixel is a sub-pixel whose grayscale to be displayed is greater than or equal to the preset grayscale threshold, and the second sub-pixel is a sub-pixel whose grayscale to be displayed is less than the preset grayscale threshold.

Continuing to refer to FIG. 13 , according to some embodiments of the present application, optionally, the method for driving a display panel may further include the following steps:

S1302. When the image data to be displayed meets the second preset condition, turn off the data scaling function, and for any sub-pixel, determine the first target register value corresponding to the gray scale to be displayed of the sub-pixel according to the first corresponding relationship between the gray scale corresponding to the first brightness mode and the first register value, determine the first data voltage value corresponding to the first target register value according to the corresponding relationship between the first register value and the data voltage value, and drive the sub-pixel to emit light based on the first data voltage value.

That is, in the first brightness mode, the sub-pixel may be driven to emit light according to the data voltage value corresponding to the first brightness level.

According to some embodiments of the present application, optionally, the second preset condition includes: the number of first sub-pixels is less than a fifth preset threshold or the number of second sub-pixels is greater than or equal to a sixth preset threshold, the first sub-pixels are sub-pixels whose corresponding grayscale is greater than or equal to the preset grayscale threshold, and the second sub-pixels are sub-pixels whose corresponding grayscale is less than the preset grayscale threshold.

It should be noted that the display panel driving method provided in the embodiment of the present application may include any one of the steps in the gamma adjustment method of the above embodiment and can achieve its corresponding technical effect, which will not be repeated here for the sake of concise description.

Based on the gamma adjustment method provided in the above embodiment, accordingly, the embodiment of the present application also provides a specific implementation of a gamma adjustment device. Please refer to the following embodiment.

FIG14 is a schematic diagram of a structure of a gamma debugging device provided in an embodiment of the present application. As shown in FIG14 , the gamma debugging device 130 may include the following modules:

A gamma debugging module 1301 is used to perform gamma debugging according to a target brightness of a first brightness mode, and obtain a data voltage value corresponding to at least one first register value in a first register value range;

The first determination module 1302 is used to determine the data voltage corresponding to at least one second register value in the second register value range corresponding to the second brightness mode according to the data scaling relationship between the first brightness mode and the second brightness mode. value, and the second register value range is at least a portion of the register value range in the first register value range.

The gamma debugging device of the embodiment of the present application performs gamma debugging only on the first brightness mode for the first brightness mode and the second brightness mode, and obtains a data voltage value corresponding to at least one first register value in the first register value range corresponding to the first brightness mode, and then obtains a data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode directly through the data scaling relationship between the first brightness mode and the second brightness mode, and the second register value range is at least a part of the register value range in the first register value range. In this way, on the one hand, the first brightness mode and the second brightness mode are only gamma debugged once, which reduces the time and cost of gamma debugging; on the other hand, for example, when switching to the first brightness mode, the sub-pixel can be directly driven to emit light with the data voltage value corresponding to at least one first register value in the first register value range, so as to improve the local brightness of the display panel without weakening the IR drop compensation of the display panel, thereby better ensuring the display quality of the display panel and making the optical specifications of the display panel meet the standards. On the other hand, for example, when switching to the second brightness mode, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode can be directly obtained according to the data scaling relationship between the first brightness mode and the second brightness mode, and the data voltage value corresponding to at least one second register value in the second register value range can be used to drive the sub-pixel to emit light, thereby meeting the display requirements of the second brightness mode.

In some embodiments, the gamma debugging device 130 may include a second determination module for determining a first grayscale corresponding to the maximum brightness in the second brightness mode in the first brightness mode; calculating the maximum register value in the second brightness mode according to the first grayscale to obtain the second register value range.

In some embodiments, the second determination module is specifically configured to calculate the maximum register value in the second brightness mode according to the following expression:

_Q2max ＝G* ^2a +b

Among them, Q _2max represents the maximum register value in the second brightness mode, G represents the first grayscale, a represents a preset index, and b represents a preset deviation value.

In some embodiments, the first determination module 1302 is specifically used to divide the second register value range into the first number of second register values according to the first number of the first register values in the first register value range; for any second register value, determine the data voltage value corresponding to the second register value based on the data voltage value corresponding to the first register value of the same register value as the second register value in the first register value range.

In some embodiments, the data scaling relationship includes a scaling relationship between a grayscale in the first brightness mode and a grayscale in the second brightness mode or a scaling relationship between a register value in the first brightness mode and a register value in the second brightness mode.

In some embodiments, the gamma debugging device 130 may further include an adjustment module for obtaining a first brightness when the display panel displays a first test picture and a second brightness when the display panel displays a second test picture, wherein the first test picture is a full-screen target grayscale picture, and the second test picture is a local area display target grayscale picture; When the difference between the brightness and the second brightness is greater than or equal to a first preset threshold, adjust the data voltage value corresponding to the sub-pixel in the local area of the display panel when displaying the second test screen until the difference between the first brightness and the second brightness is less than the first preset threshold, and obtain the adjusted data voltage value; determine the first compensation data of the data voltage value based on the data voltage value before adjustment and the data voltage value after adjustment; when the first brightness mode and/or the second brightness mode is used, adjust the data voltage value based on the first compensation data.

In some embodiments, the adjustment module is specifically used to adjust the data voltage value according to the first compensation data when the first brightness mode and/or the second brightness mode and the image data to be displayed on the display panel meets a preset condition; wherein the preset condition includes that the number of first sub-pixels is less than a second preset threshold or the number of second sub-pixels is greater than or equal to a third preset threshold, the first sub-pixels are sub-pixels whose corresponding grayscale is greater than or equal to a preset grayscale threshold, and the second sub-pixels are sub-pixels whose corresponding grayscale is less than the preset grayscale threshold.

In some embodiments, the gamma debugging device 130 may further include an adjustment module for obtaining a first brightness when the display panel displays a first test picture, a first sub-brightness when the display panel displays a third test picture, a second sub-brightness when the display panel displays a fourth test picture, and a third sub-brightness when the display panel displays a fifth test picture, wherein the first test picture is a full-screen target grayscale picture, the third test picture is a full-screen first color picture corresponding to the target grayscale, the fourth test picture is a full-screen second color picture corresponding to the target grayscale, and the fifth test picture is a full-screen third color picture corresponding to the target grayscale; calculating the sum of the first sub-brightness, the second sub-brightness, and the third sub-brightness; and obtaining a sum of the first brightness and the second sub-brightness; When the difference between the first brightness and the second brightness is greater than or equal to a fourth preset threshold, the data voltage value corresponding to the sub-pixel of the display panel when displaying at least one of the third test picture, the fourth test picture and the fifth test picture is adjusted until the difference between the first brightness and the second brightness is less than the first preset threshold, and the difference between the first brightness and the sum value is less than the fourth preset threshold, so as to obtain the adjusted data voltage value; determine second compensation data for the data voltage value according to the data voltage value before adjustment and the data voltage value after adjustment; and adjust the data voltage value according to the second compensation data when the first brightness mode and/or the second brightness mode is used.

In some embodiments, the gamma debugging device 130 may further include a driving module for driving the sub-pixels in the display panel to emit light according to a data voltage value corresponding to at least one first register value in a first register value range when the display panel is in a first brightness mode; and for driving the sub-pixels in the display panel to emit light according to a data voltage value corresponding to at least one second register value in a second register value range when the display panel is in a second brightness mode.

In some embodiments, the adjustment module is specifically used to determine the third compensation data corresponding to the current brightness level of the display panel according to the correspondence between the predetermined brightness level and the compensation data; and adjust the data voltage value according to the first compensation data and the third compensation data.

In some embodiments, the gamma debugging module 1301 is specifically used to select multiple grayscales in a preset grayscale range as grayscale binding points; determine the target brightness corresponding to each grayscale binding point according to the predetermined correspondence between grayscale and brightness; for any grayscale binding point, obtain the grayscale image corresponding to the grayscale binding point displayed by the display panel. measured brightness; when the difference between the measured brightness corresponding to the grayscale binding point and the target brightness corresponding to the grayscale binding point is greater than or equal to the preset error threshold, adjust the data voltage value corresponding to the sub-pixel in the display panel until the difference between the measured brightness corresponding to the grayscale binding point and the target brightness corresponding to the grayscale binding point is less than the preset error threshold, and obtain the data voltage value corresponding to the grayscale binding point; based on a linear interpolation algorithm and according to the data voltage values corresponding to each of the multiple grayscale binding points, obtain the data voltage value corresponding to each grayscale in the grayscale range; according to the first corresponding relationship between the grayscale corresponding to the first brightness mode and the first register value and the data voltage value corresponding to each grayscale in the grayscale range, obtain the data voltage value corresponding to each first register value in the first register value range, and one grayscale in the grayscale range corresponds to at least one first register value in the first register value range.

Each module/unit in the device shown in FIG. 14 has the function of implementing each step in the gamma debugging method provided in the above method embodiment and can achieve its corresponding technical effect, which will not be described in detail here for the sake of brevity.

Based on the display panel driving method provided in the above embodiment, accordingly, the embodiment of the present application further provides a specific implementation of a display panel driving device. Please refer to the following embodiment.

FIG15 is a schematic diagram of a structure of a display panel driving device provided in an embodiment of the present application. As shown in FIG15 , the display panel driving device 140 may include the following modules:

A first acquisition module 1401 is used to acquire image data to be displayed on the display panel, where the image data includes a target grayscale corresponding to each sub-pixel in the display panel;

A determination module 1402 is used to determine whether to enable a data zoom function according to the image data to be displayed;

The first driving module 1403 is used to determine, when the data scaling function is turned on, a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode according to a data scaling relationship between the first brightness mode and the second brightness mode, wherein the second register value range is at least a partial register value range in the first register value range, and the data voltage values corresponding to each first register value in the first register value range are predetermined.

The driving device of the display panel of the embodiment of the present application, on the one hand, only performs gamma debugging once in the first brightness mode and the second brightness mode, thereby reducing the time and cost of gamma debugging; on the other hand, for example, when switching to the first brightness mode, the data voltage value corresponding to at least one first register value in the first register value range can be directly used to drive the sub-pixel to emit light, thereby improving the local brightness of the display panel without weakening the IR drop compensation of the display panel, thereby better ensuring the display quality of the display panel and making the optical specifications of the display panel meet the standards. On the other hand, for example, when switching to the second brightness mode, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode can be directly obtained according to the data scaling relationship between the first brightness mode and the second brightness mode, and the data voltage value corresponding to at least one second register value in the second register value range can be used to drive the sub-pixel to emit light, thereby meeting the display requirements of the second brightness mode.

In some embodiments, the first driving module 1403 is further configured to, when the data scaling function is enabled, determine, for any sub-pixel, a second target register value corresponding to the target grayscale according to a second correspondence between a grayscale corresponding to the second brightness mode and a second register value, and determine a second target register value corresponding to the target grayscale according to a second correspondence between the second register value and the data voltage value. A corresponding relationship is determined, a second data voltage value corresponding to the second target register value is determined, and the sub-pixel is driven to emit light based on the second data voltage value.

In some embodiments, the judgment module 1402 is specifically used to enable the data zoom function when the image data to be displayed meets the first preset condition. The image data includes the grayscale to be displayed of each sub-pixel in the display panel, and the first preset condition includes: the automatically detected external light intensity is greater than or equal to the preset brightness threshold or the user receives an instruction to switch to the second brightness mode, and/or the number of first sub-pixels is greater than or equal to the fifth preset threshold or the second sub-pixel is less than the sixth preset threshold, the first sub-pixel is a sub-pixel whose corresponding grayscale is greater than or equal to the preset grayscale threshold, and the second sub-pixel is a sub-pixel whose corresponding grayscale is less than the preset grayscale threshold.

In some embodiments, the driving device 140 of the display panel may also include a second driving module, which is used to turn off the data scaling function when the image data to be displayed meets the second preset condition, and for any sub-pixel, determine the first target register value corresponding to the target grayscale according to the first correspondence between the grayscale corresponding to the first brightness mode and the first register value, determine the first data voltage value corresponding to the first target register value according to the correspondence between the first register value and the data voltage value, and drive the sub-pixel to emit light based on the first data voltage value.

In some embodiments, the second preset condition includes: the number of first sub-pixels is less than a fifth preset threshold or the number of second sub-pixels is greater than or equal to a sixth preset threshold.

Based on the gamma adjustment method or display panel driving method provided in the above embodiments, the present application also provides a specific implementation of the electronic device. Please refer to the following embodiments.

The electronic device may include a processor 1501 and a memory 1502 storing computer program instructions.

Specifically, the above-mentioned processor 1501 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

Memory 1502 may include a large capacity memory for data or instructions. By way of example and not limitation, memory 1502 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. In one example, memory 1502 may include a removable or non-removable (or fixed) medium, or memory 1502 is a non-volatile solid-state memory. Memory 1502 may be internal or external to the electronic device.

In one example, the memory 1502 may be a read-only memory (ROM). In one example, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

The memory 1502 may include a read-only memory (ROM), a random access memory (RAM), a disk storage Storage medium device, optical storage medium device, flash memory device, electrical, optical or other physical/tangible memory storage device. Therefore, generally, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of the present application.

The processor 1501 implements the method/steps in the above method embodiment by reading and executing the computer program instructions stored in the memory 1502, and achieves the corresponding technical effects achieved by the method embodiment executing its method/steps, which will not be repeated here for the sake of brevity.

In one example, the electronic device may further include a communication interface 1503 and a bus 1510. As shown in FIG16, the processor 1501, the memory 1502, and the communication interface 1503 are connected via the bus 1510 and communicate with each other.

The communication interface 1503 is mainly used to implement communication between various modules, devices, units and/or equipment in the embodiments of the present application.

The bus 1510 includes hardware, software, or both, coupling components of the electronic device to each other. By way of example and not limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable bus or a combination of two or more of these. Where appropriate, the bus 1510 may include one or more buses. Although the embodiments of the present application describe and illustrate specific buses, the present application contemplates any suitable bus or interconnect.

In addition, in combination with the gamma debugging method or the display panel driving method in the above-mentioned embodiment, the embodiment of the present application may provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the gamma debugging methods or display panel driving methods in the above-mentioned embodiments is implemented. Examples of computer-readable storage media include non-transitory computer-readable storage media, such as electronic circuits, semiconductor memory devices, ROM, random access memory, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, and hard disks.

Based on the gamma debugging method or the display panel driving method in the above embodiments, an embodiment of the present application further provides a display device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the steps of the gamma debugging method or the display panel driving method in the above embodiments are implemented.

It should be understood that the present application is not limited to the specific configurations and processes described above and shown in the drawings. For the sake of brevity, a detailed description of the known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

The functional blocks shown in the structural block diagram described above can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link via a data signal carried in a carrier. "Machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and/or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and/or the block diagram and the combination of each square box in the flow chart and/or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function/action specified in one or more square boxes of the flow chart and/or the block diagram.Such a processor can be but is not limited to a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It can also be understood that each square box in the block diagram and/or the flow chart and the combination of the square boxes in the block diagram and/or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

A gamma debugging method, comprising:

Perform gamma debugging according to the target brightness of the first brightness mode to obtain a data voltage value corresponding to at least one first register value in the first register value range;

According to the data scaling relationship between the first brightness mode and the second brightness mode, a data voltage value corresponding to at least one second register value in a second register value range corresponding to the second brightness mode is determined, and the second register value range is at least a partial register value range in the first register value range.
The gamma debugging method according to claim 1, wherein before determining the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode according to the data scaling relationship between the first brightness mode and the second brightness mode, the method further comprises:

Determine a first gray scale corresponding to the maximum brightness in the second brightness mode in the first brightness mode;

The maximum register value in the second brightness mode is calculated according to the first gray scale to obtain the second register value range.
The gamma debugging method according to claim 2, wherein the first grayscale corresponding to the maximum brightness in the second brightness mode in the first brightness mode is determined according to the following expression:

Among them, L 1max and L 2max are known, L 1max represents the maximum brightness in the first brightness mode, L 2max represents the maximum brightness in the second brightness mode, and G represents the first grayscale.
The gamma debugging method according to claim 2, wherein the calculating the maximum register value in the second brightness mode according to the first grayscale specifically comprises:

According to the following expression, the maximum register value in the second brightness mode is calculated:
Q2max ＝G* 2a +b

Among them, Q 2max represents the maximum register value in the second brightness mode, G represents the first grayscale, a represents a preset index, and b represents a preset deviation value.
The gamma debugging method according to claim 1, wherein:

The data scaling relationship between the first brightness mode and the second brightness mode is determined. The data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode specifically includes:

dividing the second register value range into the first number of second register values according to a first number of the first register values in the first register value range;

For any second register value, the data voltage value corresponding to the second register value is determined according to the data voltage value corresponding to the first register value having the same register value as the second register value in the first register value range.
The gamma debugging method according to claim 5, wherein the data scaling relationship comprises a scaling relationship between a grayscale in the first brightness mode and a grayscale in the second brightness mode or a scaling relationship between a register value in the first brightness mode and a register value in the second brightness mode.
The gamma debugging method according to claim 1, wherein the gamma debugging method further comprises:

Acquire a first brightness when the display panel displays a first test picture and a second brightness when the display panel displays a second test picture, wherein the first test picture is a full-screen target grayscale picture, and the second test picture is a local area display target grayscale picture;

When the difference between the first brightness and the second brightness is greater than or equal to a first preset threshold, adjusting the data voltage value corresponding to the sub-pixel in the local area of the display panel when displaying the second test picture until the difference between the first brightness and the second brightness is less than the first preset threshold, thereby obtaining the adjusted data voltage value;

Determining first compensation data of the data voltage value according to the data voltage value before adjustment and the data voltage value after adjustment;

In the first brightness mode and/or the second brightness mode, the data voltage value is adjusted according to the first compensation data.
The gamma adjustment method according to claim 7, wherein the target grayscale includes 255 grayscales.
The gamma debugging method according to claim 8, wherein the first brightness includes an average brightness when the display panel displays the first test picture, and the second brightness includes an average brightness of a white area when the display panel displays the second test picture.
The gamma debugging method according to claim 7, wherein the determining the first compensation data of the data voltage value according to the data voltage value before adjustment and the data voltage value after adjustment comprises:

Calculating a difference between the data voltage value before adjustment and the data voltage value after adjustment to obtain first compensation data for the data voltage value;

Alternatively, a ratio between the data voltage value before adjustment and the data voltage value after adjustment is calculated to obtain first compensation data of the data voltage value.
The gamma debugging method according to claim 7, wherein when the first brightness mode and/or the second brightness mode and the image data to be displayed by the display panel meets a preset condition, the data voltage value is adjusted according to the first compensation data;

The preset conditions include that the number of first sub-pixels is less than a second preset threshold or the number of second sub-pixels is greater than or equal to a third preset threshold, the first sub-pixels are sub-pixels whose corresponding grayscale is greater than or equal to the preset grayscale threshold, and the second sub-pixels are sub-pixels whose corresponding grayscale is less than the preset grayscale threshold.
The gamma debugging method according to claim 1, wherein the gamma debugging method further comprises:

Obtaining a first brightness when the display panel displays a first test picture, a first sub-brightness when the display panel displays a third test picture, a second sub-brightness when the display panel displays a fourth test picture, and a third sub-brightness when the display panel displays a fifth test picture, wherein the first test picture is a full-screen target grayscale picture, the third test picture is a full-screen first color picture corresponding to the target grayscale, the fourth test picture is a full-screen second color picture corresponding to the target grayscale, and the fifth test picture is a full-screen third color picture corresponding to the target grayscale;

Calculating a sum of the first sub-brightness, the second sub-brightness, and the third sub-brightness;

When the difference between the first brightness and the sum value is greater than or equal to a fourth preset threshold, adjusting the data voltage value corresponding to the sub-pixel of the display panel when displaying at least one of the third test picture, the fourth test picture, and the fifth test picture, until the difference between the first brightness and the second brightness is less than the first preset threshold, and the difference between the first brightness and the sum value is less than the fourth preset threshold, to obtain the adjusted data voltage value;

Determining second compensation data of the data voltage value according to the data voltage value before adjustment and the data voltage value after adjustment;

In the first brightness mode and/or the second brightness mode, the data voltage value is adjusted according to the second compensation data.
The gamma debugging method according to claim 1, wherein the gamma debugging method further comprises:

When the display panel is in the first brightness mode, driving a sub-pixel in the display panel to emit light according to a data voltage value corresponding to at least one first register value in the first register value range;

When the display panel is in the second brightness mode, the sub-pixels in the display panel are driven to emit light according to a data voltage value corresponding to at least one second register value in the second register value range.
The gamma debugging method according to claim 7, wherein when the first brightness mode and/or the second brightness mode is used, adjusting the data voltage value according to the first compensation data specifically comprises:

Determining third compensation data corresponding to a current brightness level of the display panel according to a predetermined correspondence relationship between brightness levels and compensation data;

The data voltage value is adjusted according to the first compensation data and the third compensation data.
The gamma debugging method according to claim 1, wherein the performing gamma debugging according to the target brightness of the first brightness mode to obtain a data voltage value corresponding to at least one first register value in the first register value range comprises:

Select multiple grayscales in a preset grayscale range as grayscale binding points;

Determining the target brightness corresponding to each grayscale binding point according to a predetermined correspondence relationship between grayscale and brightness;

For any of the grayscale binding points, obtaining the measured brightness when the display panel displays the grayscale picture corresponding to the grayscale binding point;

When the difference between the measured brightness corresponding to the grayscale binding point and the target brightness corresponding to the grayscale binding point is greater than or equal to the preset error threshold, the data voltage value corresponding to the sub-pixel in the display panel is adjusted until the measured brightness corresponding to the grayscale binding point is equal to the target brightness corresponding to the grayscale binding point. The difference between the grayscale values is less than the preset error threshold, and the data voltage value corresponding to the grayscale binding point is obtained;

Based on a linear interpolation algorithm and according to the data voltage values corresponding to the plurality of grayscale binding points, a data voltage value corresponding to each grayscale in the grayscale range is obtained;

According to the first corresponding relationship between the grayscale corresponding to the first brightness mode and the first register value and the data voltage value corresponding to each grayscale in the grayscale range, the data voltage value corresponding to each first register value in the first register value range is obtained.
A method for driving a display panel, the method comprising:

Acquiring image data to be displayed on the display panel;

Determining whether to enable a data zoom function according to the image data to be displayed;

When the data scaling function is turned on, the data voltage value corresponding to at least one second register value in the second register value range corresponding to the second brightness mode is determined according to the data scaling relationship between the first brightness mode and the second brightness mode, the second register value range is at least a partial register value range in the first register value range corresponding to the first brightness mode, and the data voltage values corresponding to each first register value in the first register value range are predetermined.
The method for driving a display panel according to claim 16, wherein:

The image data includes the grayscale to be displayed by each sub-pixel in the display panel;

The driving method of the display panel further includes:

When the data scaling function is turned on, for any sub-pixel, the second target register value corresponding to the gray scale to be displayed by the sub-pixel is determined according to the second correspondence between the gray scale corresponding to the second brightness mode and the second register value, and the second data voltage value corresponding to the second target register value is determined according to the correspondence between the second register value and the data voltage value, and the sub-pixel is driven to emit light based on the second data voltage value.
The method for driving a display panel according to claim 16, wherein:

The determining, according to the image data to be displayed, whether to enable the data zoom function specifically includes:

When the image data to be displayed meets a first preset condition, starting a data zoom function;

The image data includes the grayscale to be displayed by each sub-pixel in the display panel, and the first preset condition includes: the detected external light intensity is greater than or equal to a preset brightness threshold or receiving a user instruction to switch to the second brightness mode, and/or the number of first sub-pixels is greater than or equal to a fifth preset threshold or the number of second sub-pixels is less than a sixth preset threshold, the first sub-pixels are sub-pixels whose grayscale to be displayed is greater than or equal to the preset grayscale threshold, and the second sub-pixels are sub-pixels whose grayscale to be displayed is less than the preset grayscale threshold;
The method for driving a display panel according to claim 16, wherein the method for driving a display panel further comprises:

When the image data to be displayed meets the second preset condition, the data scaling function is turned off, and for any sub-pixel, a first target register value corresponding to the grayscale to be displayed by the sub-pixel is determined according to a first correspondence between the grayscale corresponding to the first brightness mode and the first register value, a first data voltage value corresponding to the first target register value is determined according to a correspondence between the first register value and the data voltage value, and the sub-pixel is driven to emit light based on the first data voltage value;

The second preset condition includes: the number of the first sub-pixels is less than the fifth preset threshold or the number of the second sub-pixels is greater than or equal to the sixth preset threshold.
A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the gamma debugging method according to any one of claims 1 to 15 or the display panel driving method according to any one of claims 16 to 19.