CN115206224A - Brightness adjusting method, device, equipment, medium, display panel and display device - Google Patents

Brightness adjusting method, device, equipment, medium, display panel and display device Download PDF

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CN115206224A
CN115206224A CN202210876079.9A CN202210876079A CN115206224A CN 115206224 A CN115206224 A CN 115206224A CN 202210876079 A CN202210876079 A CN 202210876079A CN 115206224 A CN115206224 A CN 115206224A
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value
brightness
average pixel
target
pixel value
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叶帅
严银喆
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Theoretical Computer Science (AREA)
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Abstract

The application discloses a brightness adjusting method, a brightness adjusting device, brightness adjusting equipment, a medium, a display panel and a display device, and belongs to the technical field of display. The method comprises the following steps: adjusting a gamma register value corresponding to a target low average pixel value of the display panel to enable the display brightness of the display panel under the condition of the target low average pixel value to be first target brightness, adjusting the display brightness of the front display panel under the condition of the target low average pixel value to be second target brightness, wherein the second target brightness is smaller than the first target brightness, and the target low average pixel value is smaller than or equal to 15%; acquiring a real-time average pixel value and a gamma value, and acquiring a first gray scale adjustment value based on the real-time average pixel value and the gamma value; reducing the gray scale value corresponding to the target low average pixel value by a first gray scale adjustment value to obtain a gray scale value corresponding to the real-time average pixel value; and controlling the display panel to display according to the gray-scale value corresponding to the real-time average pixel value. According to the embodiment of the application, the display effect of the display panel can be improved.

Description

Brightness adjusting method, device, equipment, medium, display panel and display device
Technical Field
The application belongs to the technical field of display, and particularly relates to a brightness adjusting method, device, equipment, medium, display panel and display device.
Background
The Average pixel value (APL) is the Average relative luminance of the sub-pixels. With the continuous improvement of display technologies, display panels have various display modes. In some display modes, a user wants to be able to display an image better by making the brightness of the display panel higher with a smaller APL. However, the brightness corresponding to the APL is affected by the IR Drop, which is the voltage Drop of the display panel, so that the brightness corresponding to a small APL cannot be increased, and it is difficult to meet the display requirements of the display panel.
Disclosure of Invention
The embodiment of the application provides a brightness adjusting method, a brightness adjusting device, a brightness adjusting medium, a display panel and a display device, which can meet the display requirements of the display panel and improve the display effect of the display panel.
In a first aspect, an embodiment of the present application provides a brightness adjustment method, including: adjusting a gamma register value corresponding to a target low average pixel value of the display panel to enable the display brightness of the display panel under the condition of the target low average pixel value to be first target brightness, adjusting the display brightness of the front display panel under the condition of the target low average pixel value to be second target brightness, wherein the second target brightness is smaller than the first target brightness, and the target low average pixel value is smaller than or equal to 15%; acquiring a real-time average pixel value and a gamma value, and acquiring a first gray scale adjustment value based on the real-time average pixel value and the gamma value; reducing the gray scale value corresponding to the target low average pixel value by a first gray scale adjustment value to obtain a gray scale value corresponding to the real-time average pixel value; and controlling the display panel to display according to the gray-scale value corresponding to the real-time average pixel value.
In a second aspect, an embodiment of the present application provides a brightness adjustment device, including: the first adjusting module is used for adjusting a gamma register value corresponding to a target low average pixel value of the display panel, so that the display brightness of the display panel under the condition of the target low average pixel value is first target brightness, the display brightness of the front display panel under the condition of the target low average pixel value is adjusted to be second target brightness, the second target brightness is smaller than the first target brightness, and the target low average pixel value is smaller than or equal to 15%; the calculation module is used for acquiring a real-time average pixel value and a gamma value and obtaining a first gray scale adjustment value based on the real-time average pixel value and the gamma value; the second adjusting module is used for increasing or decreasing the gray-scale value corresponding to the target low-average pixel value by the first gray-scale adjusting value to obtain the gray-scale value corresponding to the real-time average pixel value; and the control module is used for controlling the display panel to display according to the gray-scale value corresponding to the real-time average pixel value.
In a third aspect, an embodiment of the present application provides a luminance adjustment apparatus, including: a processor and a memory storing computer program instructions; the processor, when executing the computer program instructions, implements the brightness adjustment method of the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the brightness adjustment method of the first aspect is implemented.
In a fifth aspect, embodiments of the present application provide a display panel including the brightness adjustment apparatus of the third aspect.
In a sixth aspect, an embodiment of the present application provides a display device, including the display panel of the fifth aspect.
The embodiment of the application provides a brightness adjusting method, a brightness adjusting device, a brightness adjusting medium, a display panel and a display device, wherein the display brightness of the display panel under the condition of a smaller average pixel value is expected to be higher brightness by adjusting a gamma register value corresponding to the smaller average pixel value required by the display panel. In the subsequent process, based on the real-time average pixel value and the gamma value, a first gray scale adjustment value which can be used for reducing the display brightness of the display panel under the condition of the average pixel value larger than the target low average pixel value is obtained. And reducing the gray scale value corresponding to the target low average pixel value by the first gray scale adjustment value to obtain the gray scale value corresponding to the real-time average pixel value. The display panel displays according to the gray-scale value corresponding to the real-time average pixel value, the display brightness can be guaranteed not to be too bright under the condition that the average pixel value is larger than the target low average pixel value, the display brightness of the display panel is improved under the condition that the average pixel value is smaller than or equal to the target low average pixel value, namely the average pixel value is smaller, the display requirement of the display panel is met, and the display effect of the display panel is improved.
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In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a brightness adjustment method according to an embodiment of the present application;
FIG. 2 is a diagram illustrating an example of a relationship curve between an average pixel value and display luminance according to an embodiment of the present disclosure;
FIG. 3 is a diagram illustrating another example of a graph relating average pixel value to display luminance according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a brightness adjustment method according to another embodiment of the present application;
fig. 5 is a flowchart of a brightness adjustment method according to another embodiment of the present application;
FIG. 6 is a diagram illustrating another example of a graph relating average pixel value to display luminance according to an embodiment of the present disclosure;
fig. 7 is a flowchart of a brightness adjustment method according to yet another embodiment of the present application;
FIG. 8 is a diagram illustrating an example of a dynamic luminance value versus display luminance according to an embodiment of the present disclosure;
FIG. 9 is a diagram illustrating an exemplary relationship curve between an average pixel value, a gray level down-scaling value and a dynamic luminance value according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of a brightness adjustment device according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a brightness adjustment device according to another embodiment of the present application;
fig. 12 is a schematic structural diagram of a brightness adjustment device according to yet another embodiment of the present application;
fig. 13 is a schematic structural diagram of a brightness adjustment device according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
APL is the average relative luminance of the sub-pixels. With the continuous improvement of display technologies, display panels have various display modes. In some display modes, a user wants to be able to display an image better by making the brightness of the display panel higher with a smaller APL. However, the brightness corresponding to the APL is affected by the IR Drop, which is the voltage Drop of the display panel, so that the brightness corresponding to a smaller APL cannot be increased, and it is difficult to meet the display requirements of the display panel.
The application provides a brightness adjusting method, a brightness adjusting device, equipment, a medium, a display panel and a display device, and the display brightness of the display panel under the condition of a smaller average pixel value is expected to be higher brightness by adjusting a gamma register value corresponding to the smaller average pixel value required by the display panel. In the subsequent process, the gray-scale value corresponding to the real-time average pixel value can be obtained based on the real-time average pixel value and the gamma value, and the display panel is controlled to display according to the gray-scale value corresponding to the real-time average pixel value, so that the brightness of the display panel can be improved under the condition that the average pixel value is smaller, and the display requirement of the display panel can be met.
The following describes a brightness adjustment method, device, apparatus, medium, display panel, and display device provided in the present application.
The present application provides, in a first aspect, a luminance adjusting method applicable to a luminance adjusting apparatus, device, or component, that is, the luminance adjusting method may be performed by the luminance adjusting apparatus, device, or component, and the kind of the luminance adjusting apparatus, device, or component is not limited herein. For example, the brightness adjusting device, apparatus, or component may include a host computer, a driver Integrated Circuit (IC), a display panel, a display device, and the like. Fig. 1 is a flowchart of a brightness adjustment method according to an embodiment of the present application. As shown in fig. 1, the brightness adjusting method may include steps S101 to S104.
In step S101, a gamma register value corresponding to a target low average pixel value of the display panel is adjusted to make the display brightness of the display panel under the condition of the target low average pixel value be a first target brightness.
And adjusting the display brightness of the front display panel under the condition of the target low average pixel value to be the second target brightness. Specifically, the second target brightness may be a brightness corresponding to a default gamma register value before adjusting the gamma register value corresponding to the target low average pixel value. The second target brightness is less than the first target brightness. The first target brightness may be a desired brightness for the display panel at a low average pixel value, and may be set according to application scenarios, requirements, experience, and the like. And is not limited thereto. For example, the second target brightness is 1000 nits, and the first target brightness may be set to 1300 nits. In some examples, the target low average pixel value may be a maximum of the required smaller average pixel values, and the target low average pixel value may be less than or equal to 15%. For example, the target low average pixel value may be 5% or 15%, which is not limited herein.
And adjusting the gamma register value corresponding to the target low average pixel value of the display panel, so that after the display brightness of the display panel under the condition of the target low average pixel value is the first target brightness, the relation curve of the average pixel value and the display brightness of the display panel is integrally increased. For example, fig. 2 is a schematic diagram of an example of a relationship curve between an average pixel value and display luminance provided in an embodiment of the present application, as shown in fig. 2, a relationship curve 1 is a relationship curve between an average pixel value before adjustment and display luminance, and a relationship curve 2 is a relationship curve between an average pixel value after adjustment and display luminance; the abscissa is the average pixel value, the ordinate is the display luminance (in nits), the target low average pixel value is 5%, the maximum average pixel value is 100%, the first target luminance is 1300 nits, and the second target luminance is 1000 nits; under the condition of the same average pixel value, the display brightness of the display panel after adjustment is higher than that of the display panel before adjustment, and the relation curve 2 can be regarded as a relation curve obtained after the relation curve 1 is translated upwards.
In step S102, a real-time average pixel value and a gamma value are obtained, and a first gray-scale adjustment value is obtained based on the real-time average pixel value and the gamma value.
After the gamma register value is adjusted, the display brightness of the display panel corresponding to the smaller average pixel value can be improved, but the display brightness of the display panel under the condition of the non-smaller average pixel value is too high, and in order to ensure that the display brightness of the display panel under each average pixel condition is more appropriate, the gray-scale value corresponding to the average pixel value greater than the target low average pixel value can be adjusted, so that the gray-scale value corresponding to the average pixel value greater than the target low average pixel value can be properly reduced.
The real-time average pixel value is an average pixel value of the display panel obtained in real time. With the increase of the average pixel value, the display brightness of the display panel is gradually decreased, a gray scale value corresponding to a target low average pixel value of the display panel can be obtained in advance, and the gray scale values corresponding to the average pixel values larger than the target low average pixel value are all adjusted to be smaller than the gray scale values corresponding to the target low average pixel value. And under the condition that the real-time average pixel value is larger than the target low average pixel value, obtaining a first gray scale adjustment value based on the average pixel value and the gamma value so as to reduce the display brightness of the display panel under the condition that the real-time average pixel value is larger than the target low average pixel value, and enabling the display brightness of the display panel to be more appropriate. In some examples, the first gamma adjustment value is positively correlated to the real-time average pixel value, i.e., the larger the real-time average pixel value, the larger the first gamma adjustment value. The gamma value may be set according to a scene, a requirement, an experience, and the like, and is not limited herein, and in general, the gamma value may be 2.2.
In some examples, the grayscale value of the display panel under the condition of the target low average pixel value may be a maximum grayscale value, which is a grayscale value of 255. For example, if the target low average pixel value is 5% and the gray scale value of the display panel under the condition that the low average pixel value is 5% is 255, the gray scale values of the display panel corresponding to the average pixel values greater than the target low average pixel value are all smaller than 255.
In step S103, the gray-scale value corresponding to the target low-average pixel value is decreased by the first gray-scale adjustment value to obtain the gray-scale value corresponding to the real-time average pixel value.
The gray-scale value of the display panel is reduced, and the display brightness of the display panel can also be reduced. The gray scale value corresponding to the target low average pixel value may be decreased by a first gray scale adjustment value, and a difference between the gray scale value corresponding to the target low average pixel value and the first gray scale adjustment value may be determined as the gray scale value corresponding to the real-time average pixel value. The larger the real-time average pixel value is, the larger the first gray scale adjustment value is, the smaller the gray scale value corresponding to the real-time average pixel value is, and the lower the display brightness of the display panel is, so that the adjustment of the display brightness of the display panel under the condition of the average pixel value larger than the target low average pixel value is realized.
For example, fig. 3 is a schematic diagram of another example of a relationship curve between an average pixel value and display luminance provided in an embodiment of the present application, where an abscissa is the average pixel value, an ordinate is the display luminance (in nits), a target low average pixel value is 5%, a maximum average pixel value is 100%, a first target luminance is 1300 nits, and a second target luminance is 1000 nits. Fig. 3 is a graph 2 showing the relationship between the adjusted average pixel value and the display brightness shown in fig. 2, and fig. 3 is a graph 3 showing the relationship between the adjusted average pixel value and the display brightness after the first gray-scale adjustment value is decreased. The relationship curve 2 is compared with the relationship curve 3, so that the brightness corresponding to the average pixel value which is greater than the target low average pixel value after the first gray scale adjustment value is reduced is less than the brightness corresponding to the average pixel value which is greater than the target low average pixel value after the gamma register value is adjusted.
In step S104, the display panel is controlled to display according to the gray-scale value corresponding to the real-time average pixel value.
In some examples, the adjustment of the gray-scale value corresponding to the real-time average pixel value may be achieved by adjusting the driving current or the driving voltage, so that the display brightness of the display panel can reach a desired state.
In the embodiment of the application, the display brightness of the display panel under the condition of the smaller average pixel value is the expected higher brightness by adjusting the gamma register value corresponding to the required smaller average pixel value of the display panel. In the subsequent process, based on the real-time average pixel value and the gamma value, a first gray scale adjustment value which can be used for reducing the display brightness of the display panel under the condition of the average pixel value larger than the target low average pixel value is obtained. And reducing the gray scale value corresponding to the target low average pixel value by the first gray scale adjustment value to obtain the gray scale value corresponding to the real-time average pixel value. The display panel displays according to the gray-scale value corresponding to the real-time average pixel value, the display brightness can be guaranteed not to be too bright under the condition that the average pixel value is larger than the target low average pixel value, the display brightness of the display panel is improved under the condition that the average pixel value is smaller than or equal to the target low average pixel value, namely the average pixel value is smaller, the display requirement of the display panel is met, and the display effect of the display panel is improved.
In some embodiments, the gray scale value of the display panel under the condition of the target low average pixel value is the maximum gray scale value, the corresponding relationship between the average pixel value greater than the target low average pixel value and the display brightness may be a linear relationship, and the first gray scale adjustment value may be calculated by using the linear relationship. Fig. 4 is a flowchart of a brightness adjustment method according to another embodiment of the present application. Fig. 4 is different from fig. 1 in that step S102 in fig. 1 may be specifically detailed as step S1021 and step S1022 in fig. 4, step S103 in fig. 1 may be specifically detailed as step S1031 in fig. 4, and the brightness adjustment method shown in fig. 4 may further include step S105.
In step S1021, a first luminance and a second luminance are obtained based on the real-time average pixel value.
The first brightness is a display brightness of the display panel corresponding to the real-time average pixel value in the expected brightness correspondence. In the embodiment of the present application, the expected luminance correspondence relationship may be set to be a linear relationship, and the display luminance corresponding to the real-time average pixel value may be obtained according to the expected luminance correspondence relationship and the real-time average pixel value greater than the target low average pixel value. The desired luminance correspondence may include a linear relationship between the target low average pixel value, the first target luminance, the maximum average pixel value, the predetermined target luminance. The predetermined target brightness is a display brightness of the front display panel under a condition of adjusting the maximum average pixel value. The maximum average pixel value may be 100%. The target low average pixel value and the first target luminance may be regarded as one point in a relationship curve corresponding to the desired luminance correspondence relationship, the maximum average pixel value and the predetermined target luminance may be regarded as another point in a relationship curve corresponding to the desired luminance correspondence relationship, and the desired luminance correspondence relationship may be determined from these two points.
The second brightness is the display brightness of the adjusted display panel under the condition of real-time average pixel value. The term "adjusted" herein means that the gamma register value corresponding to the target low average pixel value of the display panel is adjusted in step S101.
For example, the relationship between the adjusted average pixel value and the display luminance may be shown as a relationship curve 2 in fig. 3, and the relationship curve corresponding to the desired luminance may be shown as a relationship curve 3 in fig. 3, where A1 point in fig. 3 is a point corresponding to the target low average pixel value and the first target luminance, and A2 point is a point corresponding to the maximum average pixel value and the predetermined target luminance. If the real-time average pixel value is APL 1 Real-time average pixel value APL 1 The point A3 is corresponded on the relation curve 2, the display brightness corresponded by the point A3 is the second brightness L2, the real-time average pixel value APL 1 The display brightness corresponding to the point A4 on the relation curve 3 is the first brightness L1.
In step S1022, a first gray-scale adjustment value is calculated according to the first brightness, the second brightness, the maximum gray-scale value and the gamma value.
The second brightness is the display brightness of the display panel under the condition of real-time average pixel value before the adjustment according to the first gray scale adjustment value, and the first brightness is the expected display brightness of the display panel after the adjustment according to the first gray scale adjustment value. In order to improve the display luminance corresponding to the average pixel value less than or equal to the target low average pixel value, the gray-scale value of the display panel under the condition of the average pixel value less than or equal to the target low average pixel value is the maximum gray-scale value. The display brightness, the gray scale value and the gamma value have an incidence relation, and the incidence relation can be embodied by a gamma calculation formula, so that the gray scale value needing to be adjusted, namely the first gray scale adjustment value, can be calculated according to the first brightness, the second brightness, the maximum gray scale value and the gamma value.
In some examples, the first luminance L1, the second luminance L2, the maximum gray-scale value Gm, the gamma value γ, and the first gray-scale adjustment value G1 satisfy the following condition, i.e., equation (1):
Figure BDA0003762574020000081
the maximum gray scale value Gm here is 255.
In step S1031, when the real-time average pixel value is greater than the target low-average pixel value, the first gray-scale adjustment value is subtracted from the maximum gray-scale value to obtain a gray-scale value corresponding to the real-time average pixel value.
For example, the gray level value corresponding to the real-time average pixel value is G', and the first gray level adjustment value is G1, the following formula (2) can be obtained:
G’＝255-G1 (2)
in step S105, when the real-time average pixel value is equal to or less than the target low-average pixel value, the maximum grayscale value is determined as the grayscale value corresponding to the real-time average pixel value.
In the embodiment of the present application, the correspondence between the average pixel value and the display brightness may include two parts, one part is the correspondence between the average pixel value smaller than or equal to the target low average pixel value and the display brightness, and the other part is the correspondence between the average pixel value larger than the target low average pixel value and the display brightness. In some examples, where the real-time average pixel value is less than or equal to the target low average pixel value, the display brightness may be negatively correlated with the real-time average pixel value. In some examples, in a case where the real-time average pixel value is less than or equal to the target low average pixel value, the display luminances corresponding to the real-time average pixel value may be the same, and may all be the first target luminance.
The brightness adjustment method in the above embodiment may be performed without a Global IR drop compensation (GIR) function of the display panel, or may be used without the GIR function being turned on in the display panel. When the GIR function in the display panel is turned on, the GIR function needs to be turned off first, and then the brightness adjusting method in the above embodiment is performed. The GIR function is a function of controlling the display panel to maintain uniform display brightness under each average pixel value, and the GIR function is turned on, so that the brightness adjusting method in the above embodiment cannot function.
In some embodiments, when the GIR function of the display panel is turned on, the display brightness of the average pixel value of the display panel under the condition of being less than or equal to the target low average pixel value can also be improved. Fig. 5 is a flowchart of a brightness adjustment method according to another embodiment of the present disclosure, where the brightness adjustment method shown in fig. 5 can be executed when the GIR function of the display panel is turned on. As shown in fig. 5, the brightness adjusting method may include steps S201 to S203.
In step S201, when the GIR function of the display panel is turned on, the gamma register value is adjusted to make the display brightness of the display panel under any average pixel value be the third target brightness.
The third target brightness includes one of a third brightness and a fourth brightness, the fourth brightness being less than the third brightness. The third brightness and the fourth brightness may be set according to a scene, a requirement, experience, and the like, and are not limited herein. For example, the third luminance may be 1300 nits and the fourth luminance may be 800 nits. In some examples, the third luminance is greater than the second target luminance in the above embodiments.
In step S202, a real-time average pixel value is obtained, and when the real-time average pixel value is within the target average pixel value range, the display panel is controlled to invoke a data scaling function to scale down or up a gray level value corresponding to the third target brightness to a target gray level value.
The range of average pixel values may include a target range of average pixel values and a non-target range of average pixel values. The non-target average pixel value range is the complement of the target average pixel value range in the range of average pixel values. The target average pixel value range may be an average pixel value range of less than or equal to the target low average pixel value, or the target average pixel value range may be an average pixel value range of greater than the target low average pixel value. In the embodiment of the present application, it is desirable to improve the display brightness of the display panel under the condition of the average pixel value less than or equal to the target low average pixel value, that is, the display brightness of the display panel under the condition of the average pixel value less than or equal to the target low average pixel value needs to be greater than the display brightness of the display panel under the condition of the average pixel value greater than the target low average pixel value.
When the GIR function is turned on, the display brightness of the display panel is the third target brightness under the condition of each average pixel value. In order to distinguish the display brightness of the display panel under the condition of the average pixel value less than or equal to the target low average pixel value and the display brightness of the display panel under the condition of the average pixel value greater than the target low average pixel value, a Data scaling function of the display panel can be utilized, and the Data scaling function can reduce or enlarge the gray-scale value to obtain the target gray-scale value. That is, the display luminance of the display panel is adjusted by decreasing or increasing the gray scale value based on the gray scale value corresponding to the third target luminance.
The target gray-scale value corresponds to the fourth target brightness, that is, the display brightness of the display panel is the fourth target brightness if the gray-scale value of the display panel is adjusted to the target gray-scale value under the condition that the real-time average pixel value of the display panel is within the target average pixel value range. The fourth target brightness includes the other of the third brightness and the fourth brightness. In some examples, the third target brightness is the third brightness, and the Data scaling function is used to scale down the grayscale value corresponding to the third brightness to the grayscale value corresponding to the fourth brightness, where the fourth target brightness is the fourth brightness. In other examples, the third target brightness is a fourth brightness, and the Data scaling function is used to scale up a grayscale value corresponding to the fourth brightness to a grayscale value corresponding to the third brightness, where the fourth target brightness is the third brightness.
For example, fig. 6 is a schematic diagram of another example of a relationship curve between an average pixel value and display luminance provided in an embodiment of the present application, where an abscissa is the average pixel value, an ordinate is the display luminance (in nits), a target low average pixel value is 15%, and a maximum average pixel value is 100%. As shown in fig. 6, the display luminance corresponding to the range of the average pixel value equal to or less than the target low average pixel value is 1300 nits, and the display luminance corresponding to the range of the average pixel value greater than the target low average pixel value is 800 nits. If the third luminance is 1300 nits and the fourth luminance is 800 nits, the gray level value corresponding to 1300 nits needs to be reduced to the gray level value corresponding to 800 nits under the condition that the real-time average pixel value is less than or equal to the target low average pixel value.
In step S203, the display panel is controlled to display according to the target gray scale value.
When the GIR function of the display panel is turned on, the range of the average pixel value can be divided into two regions, and when the real-time average pixel value is located in one of the regions, the gray-scale value caused by the turn-on of the GIR function is enlarged or reduced through the Data scaling function of the display panel, so that the gray-scale value corresponding to the one region is different from the gray-scale value corresponding to the other region, specifically, the gray-scale value corresponding to the region less than or equal to the target low average pixel value is larger than the gray-scale value corresponding to the region greater than the target low average pixel value, so as to improve the display brightness of the display panel under the condition of the average pixel value less than or equal to the target low average pixel value.
In some embodiments, the target range of average pixel values may be a range greater than the target low average pixel value or a range less than or equal to the target low average pixel value. The third target luminance includes a third luminance in a case where the target average pixel value range is a range greater than the target low average pixel value; the third target luminance includes a fourth luminance in a case where the target average pixel value range is a range equal to or less than the target low average pixel value. Fig. 7 is a flowchart of a brightness adjustment method according to yet another embodiment of the present application. Fig. 7 differs from fig. 5 in that in the case where the target average pixel value range is a range larger than the target low average pixel value, step S202 in fig. 5 can be specifically subdivided into step S2021 and step S2022 in fig. 7; in the case where the target average pixel value range is a range equal to or less than the target low average pixel value, step S202 in fig. 5 can be specifically subdivided into step S2023 and step S2024 in fig. 7.
In step S2021, a gray level down-tone value is calculated according to the maximum gray level value, the gamma value, the third brightness and the fourth brightness.
The gray scale value, the gamma value and the display brightness have an incidence relation, and the incidence relation can be embodied by a gamma calculation formula, so that the gray scale down-regulation value can be calculated according to the maximum gray scale value, the gamma value, the third brightness and the fourth brightness. The maximum gray level value is a gray level of 255.
In step S2022, the display panel is controlled to invoke the data scaling function to scale down the gray level corresponding to the third target brightness to the target gray level.
The target gray scale value is a difference value between a gray scale value corresponding to the third target brightness and the gray scale down-regulation value. The reduction coefficient used by the data scaling function may be calculated according to the gray scale value corresponding to the third target brightness and the target gray scale value. In some examples, the reduction coefficient used by the data scaling function may be a ratio of the target gray-scale value to a gray-scale value corresponding to the third target brightness, and a product of the gray-scale value corresponding to the third target brightness and the reduction coefficient is the target gray-scale value.
The gray-scale value of the display panel under the condition of the non-target average pixel value range can be called as a first gray-scale value. In the case where the target average pixel value range is a range larger than the target low average pixel value, the non-target average pixel value range is a range equal to or smaller than the target low average pixel value.
In step S2023, a gray level up value is calculated according to the maximum gray level value, the gamma value, the third brightness and the fourth brightness.
The gray scale value, the gamma value and the display brightness have an incidence relation, and the incidence relation can be embodied by a gamma calculation formula, so that the gray scale up-regulation value can be calculated according to the maximum gray scale value, the gamma value, the third brightness and the fourth brightness. The maximum gray level value is a gray level of 255.
In step S2024, the display panel is controlled to invoke the data scaling function to scale up the gray level corresponding to the third target brightness to the target gray level.
The target gray scale value is the sum of the initial gray scale value and the gray scale up-regulation value. The magnification factor used by the data scaling function may be calculated based on the initial gray scale value and the target gray scale value. In some examples, the magnification factor used by the data scaling function may be a ratio of the target gray scale value to the initial gray scale value, and a product of the initial gray scale value and the magnification factor is the target gray scale value.
The gray scale value of the display panel under the condition of the non-target average pixel value range can be called as a second gray scale value. In the case where the target average pixel value range is a range equal to or less than the target low average pixel value, the non-target average pixel value range is a range greater than the target low average pixel value.
The initial gray scale value may be set according to a scene, a demand, experience, and the like, and is not limited herein. The initial gray scale value may be a gray scale value corresponding to the fourth luminance. In some examples, the initial gray scale value may correspond to a target dynamic luminance value, which may be a lower limit value of the highlight dynamic luminance range. The Dynamic Brightness Value (DBV) may include a 51 Value, which is a register Value of a 51 register in the display panel. The highlight dynamic luminance range may be a range of dynamic luminance in a highlight Mode (HBM). For example, the highlight dynamic luminance range is [2047, 4095], then the target dynamic luminance value is 2047.
The gray scale value of the display panel under the condition within the non-target average pixel value range may be referred to as a second gray scale value. In the case where the target average pixel value range is a range equal to or less than the target low average pixel value, the non-target average pixel value range is a range greater than the target low average pixel value.
The gray scale value of the display panel under the condition that the average pixel value is less than or equal to the target low average pixel value is a first gray scale value, and the gray scale value of the display panel under the condition that the average pixel value is greater than the target low average pixel value is a second gray scale value. The higher the gray-scale value is, the higher the corresponding display brightness is, the second gray-scale value is smaller than the first gray-scale value, and the display brightness of the display panel under the condition that the average pixel value is smaller than or equal to the target low average pixel value can be larger than the display brightness of the display panel under the condition that the average pixel value is larger than the target low average pixel value, so that the display brightness of the display panel under the condition that the average pixel value is smaller than or equal to the target low average pixel value is improved.
In some examples, the second gray-scale adjustment value G2, the maximum gray-scale value Gm, the gamma value γ, the third luminance L3, and the fourth luminance L4 may satisfy the following condition, i.e., equation (3):
Figure BDA0003762574020000131
the second gray scale adjustment value comprises a gray scale down value or a gray scale up value. In the case where the target average pixel value range is greater than the target low average pixel value range, the second gray scale adjustment value includes a gray scale down value, i.e., the gray scale down value may be calculated according to equation (3). In the case that the target average pixel value range is equal to or less than the target low average pixel value range, the second gray-scale adjustment value includes a gray-scale up value, i.e. the gray-scale up value can be calculated according to equation (3).
If the GIR function of the display panel is started, the real-time average pixel value is obtained only under the condition that the obtained real-time dynamic brightness value is within the range of the high-brightness dynamic brightness, and the brightness adjusting method under the condition that the GIR function of the display panel is started is executed. The upper limit value of the highlight dynamic brightness range is the maximum value of the dynamic brightness. In some examples, the dynamic brightness maximum is 4095. The dynamic brightness value is positively correlated with the display brightness, and the first gray scale value is the maximum gray scale value under the condition that the display panel is at the maximum dynamic brightness value, so as to ensure that the display brightness corresponding to the maximum dynamic brightness value is the highest.
When the dynamic brightness value is low, that is, the dynamic brightness value is outside the highlight dynamic brightness range, the change of the display brightness of the display panel is not obvious under the observation of naked eyes, the significance of the brightness adjusting method is not great when the GIR function of the display panel is executed, and the optimization of the display effect is not great. And executing the brightness adjusting method under the condition that the GIR function of the display panel is started only when the real-time dynamic brightness value is within the highlight dynamic brightness range, so that the consumption of resources such as operation, storage and the like can be reduced, and the operating efficiency of the display panel is improved.
In some embodiments, when the real-time dynamic luminance value is within the highlight dynamic luminance range, the third luminance and the fourth luminance in the above embodiments are first calculated, and then the luminance of the display panel is adjusted based on the third luminance and the fourth luminance.
And under the condition that the dynamic brightness value is in the high-brightness dynamic brightness range, the corresponding relation between the dynamic brightness value and the display brightness is a linear relation. The display brightness of the display panel under the condition that the average pixel value is less than or equal to the target low average pixel value is larger than the display brightness of the display panel under the condition that the average pixel value is larger than the target low average pixel value. The linear relationship between the dynamic luminance value and the display luminance in a range equal to or less than the target low average pixel value is different from the linear relationship between the dynamic luminance value and the display luminance in a range greater than the target low average pixel value. Under different dynamic brightness values, the display brightness of the display panel is different under the condition that the average pixel value is less than or equal to the target low average pixel value. Under different dynamic brightness value conditions, the display brightness of the display panel is different under the condition that the average pixel value is larger than the target low average pixel value. The third brightness corresponding to different dynamic brightness values is different, and the fourth brightness corresponding to different dynamic brightness values is different.
The third brightness can be obtained by utilizing an interpolation algorithm according to the real-time dynamic brightness value, the upper limit value of the highlight dynamic brightness range, the lower limit value of the highlight dynamic brightness range, the first target brightness and the fifth target brightness.
The first target luminance is display luminance of the display panel under a condition that the display panel is at an upper limit value of the highlight dynamic luminance range and within a range of not more than a target low average pixel value. The fifth target luminance is the display luminance of the display panel at the lower limit value of the highlight dynamic luminance range. For convenience of explanation, a point corresponding to the upper limit value of the highlight dynamic luminance range and the first target luminance in the relation curve between the dynamic luminance value and the display luminance is referred to as a first point, and a point corresponding to the lower limit value of the highlight dynamic luminance range and the fifth target luminance in the relation curve between the dynamic luminance value and the display luminance is referred to as a second point. The first point and the second point are two end points of a relation curve of dynamic brightness values and display brightness in a range which is less than or equal to the target low average pixel value in the highlight dynamic brightness range, and the corresponding relation of the dynamic brightness values and the display brightness in the range which is less than or equal to the target low average pixel value can be obtained according to the two end points.
For convenience of explanation, the correspondence relationship between the dynamic luminance value and the display luminance in the range of the highlight dynamic luminance range equal to or less than the target low average pixel value is referred to as a first correspondence relationship. According to the first corresponding relation and the real-time dynamic brightness value, the display brightness corresponding to the real-time dynamic brightness value in the first corresponding relation can be obtained by utilizing an interpolation algorithm, and the display brightness can be determined as a third brightness of the display panel under the real-time dynamic brightness value condition.
The fourth luminance can be obtained by utilizing an interpolation algorithm according to the real-time dynamic luminance value, the upper limit value of the highlight dynamic luminance range, the lower limit value of the highlight dynamic luminance range, the fifth target luminance and the sixth target luminance.
The sixth target luminance is display luminance under the condition that the display panel is at the upper limit value of the highlight dynamic luminance range and within a range larger than the target low average pixel value. The fifth target brightness can refer to the related contents in the above embodiments, and is not described herein again.
For convenience of explanation, a point corresponding to the upper limit value of the highlight dynamic luminance range and the fifth target luminance in the dynamic luminance value-display luminance relationship curve is referred to as a second point, and a point corresponding to the lower limit value of the highlight dynamic luminance range and the sixth target luminance in the dynamic luminance value-display luminance relationship curve is referred to as a third point. The second point and the third point are two end points of a relation curve of dynamic brightness values and display brightness in a range larger than the target low average pixel value in the highlight dynamic brightness range, and the corresponding relation of the dynamic brightness values and the display brightness in the range larger than the target low average pixel value can be obtained according to the two end points.
For convenience of explanation, the correspondence relationship between the dynamic luminance value and the display luminance in the range of the high luminance dynamic luminance range larger than the target low average pixel value is referred to as a second correspondence relationship. According to the second corresponding relation and the real-time dynamic brightness value, the display brightness corresponding to the real-time dynamic brightness value in the second corresponding relation can be obtained by utilizing an interpolation algorithm, and the display brightness can be determined as the fourth brightness of the display panel under the real-time dynamic brightness value condition.
For example, fig. 8 is a schematic diagram of an example of a relationship curve between a dynamic luminance value and a display luminance provided in an embodiment of the present application, where an abscissa represents the dynamic luminance value and an ordinate represents the display luminance (in nits). As shown in fig. 8, the range of dynamic luminance values [2047, 4095] is the range of high dynamic luminance values, the relationship curve 4 is a relationship curve between dynamic luminance values and display luminance in a range of not more than a target low average pixel value, the relationship curve 5 is a relationship curve between dynamic luminance values and display luminance in a range of more than a target low average pixel value, and the relationship curve 4 and the relationship curve 5 partially overlap in the range of non-high dynamic luminance values, that is, the relationship curve 4 and the relationship curve 5 overlap in the range of dynamic luminance values [0, 2047 ].
For example, the target average pixel value range is a range larger than the target low average pixel value, the third target luminance includes a third luminance, fig. 9 is a schematic diagram of an example of a relationship curve of the average pixel value, the gray scale down value and the dynamic luminance value provided in the embodiment of the present application, where the abscissa is the average pixel value and the ordinate is the gray scale down value. As shown in fig. 9, the dynamic luminance value DBV1 corresponding to the relationship curve 6 is greater than the dynamic luminance value DBV2 corresponding to the relationship curve 7, and the dynamic luminance value DBV2 corresponding to the relationship curve 7 is greater than the dynamic luminance value DBV3 corresponding to the relationship curve 8. Correspondingly, in the range larger than the target low average pixel value, the gray scale down value V1 corresponding to the relation curve 6 is larger than the gray scale down value V2 corresponding to the relation curve 7, and the gray scale down value V2 corresponding to the relation curve 7 is larger than the gray scale down value V3 corresponding to the relation curve 8.
The embodiment can obtain that the dynamic brightness value is in positive correlation with the gray scale down-regulation value and the gray scale up-regulation value, and the higher the dynamic brightness value is, the larger the gray scale down-regulation value and the gray scale up-regulation value are. The gray scale down-regulation value and the gray scale up-regulation value change along with the dynamic brightness value, and the target gray scale value in the embodiment also changes along with the dynamic brightness value, so that the situation that the brightness jumps when a user adjusts the dynamic brightness value is avoided, and the display effect of the display panel can be further improved.
In addition, the adjusting the gamma register value in step S201 may be specifically implemented as adjusting the gamma register value corresponding to the target low average pixel value when the display panel is in the maximum dynamic brightness condition. After the gamma register value corresponding to the target low average pixel value of the display panel is adjusted under the condition of the maximum dynamic brightness value, the content of the third brightness and the fourth brightness obtained according to the real-time dynamic brightness value in the embodiment can be executed, so that the automation of brightness adjustment is realized.
The second aspect of the present application provides a luminance adjusting apparatus. Fig. 10 is a schematic structural diagram of a brightness adjustment device according to an embodiment of the present application. As shown in fig. 10, the brightness adjusting apparatus 300 may include a first adjusting module 301, a calculating module 302, a second adjusting module 303, and a control module 304.
The first adjusting module 301 is configured to adjust a gamma register value corresponding to a target low average pixel value of the display panel, so that the display brightness of the display panel under the condition of the target low average pixel value is a first target brightness.
And adjusting the display brightness of the front display panel under the condition of the target low average pixel value to be a second target brightness, wherein the second target brightness is smaller than the first target brightness, and the target low average pixel value is smaller than or equal to 15%.
The calculating module 302 may be configured to obtain a real-time average pixel value and a gamma value, and obtain a first gray-scale adjustment value based on the real-time average pixel value and the gamma value.
The second adjusting module 303 may be configured to increase or decrease the gray scale value corresponding to the target low average pixel value by the first gray scale adjustment value to obtain the gray scale value corresponding to the real-time average pixel value.
The control module 304 can be used to control the display panel to display according to the gray-scale value corresponding to the real-time average pixel value.
In the embodiment of the application, the display brightness of the display panel under the condition of the smaller average pixel value is the expected higher brightness by adjusting the gamma register value corresponding to the required smaller average pixel value of the display panel. In the subsequent process, based on the real-time average pixel value and the gamma value, a first gray scale adjustment value for reducing the display brightness of the display panel under the condition of the average pixel value larger than the target low average pixel value is obtained. And reducing the gray scale value corresponding to the target low average pixel value by the first gray scale adjustment value to obtain the gray scale value corresponding to the real-time average pixel value. The display panel displays according to the gray-scale value corresponding to the real-time average pixel value, the display brightness can be guaranteed not to be too bright under the condition that the average pixel value is larger than the target low average pixel value, the display brightness of the display panel is improved under the condition that the average pixel value is smaller than or equal to the target low average pixel value, namely the average pixel value is smaller, the display requirement of the display panel is met, and the display effect of the display panel is improved.
In some embodiments, the gray scale value of the display panel under the condition of the target low average pixel value is the maximum gray scale value. The calculation module 302 may be used to: obtaining a first brightness and a second brightness based on the real-time average pixel value, wherein the first brightness is a display brightness corresponding to the real-time average pixel value of the display panel in an expected brightness corresponding relation, the second brightness is a display brightness of the adjusted display panel under the condition of the real-time average pixel value, the expected brightness corresponding relation comprises a linear relation among a target low average pixel value, a first target brightness, a maximum average pixel value and a preset target brightness, and the preset target brightness is a display brightness of the display panel before adjustment under the condition of the maximum average pixel value; and calculating to obtain a first gray scale adjustment value according to the first brightness, the second brightness, the maximum gray scale value and the gamma value.
In some examples, the real-time average pixel value is positively correlated with the first gamma adjustment value.
In some examples, the first luminance L1, the second luminance L2, the maximum grayscale value Gm, the gamma value γ, and the first grayscale adjustment value G1 satisfy the following conditions:
Figure BDA0003762574020000171
in some embodiments, the second conditioning module 303 may be configured to: and under the condition that the real-time average pixel value is larger than the target low average pixel value, subtracting the first gray scale adjustment value from the maximum gray scale value to obtain a gray scale value corresponding to the real-time average pixel value.
The second adjusting module 303 may further be configured to: and under the condition that the real-time average pixel value is less than or equal to the target low average pixel value, determining the maximum gray-scale value as the gray-scale value corresponding to the real-time average pixel value.
Fig. 11 is a schematic structural diagram of a brightness adjustment device according to another embodiment of the present application. Fig. 11 is different from fig. 10 in that the brightness adjustment apparatus 300 shown in fig. 11 may further include a function shutdown module 305.
The function shutdown module 305 may be to: before adjusting the gamma register value corresponding to the target low average pixel value in the display panel, the GIR function is closed under the condition that the GIR function of the display panel is opened.
Fig. 12 is a schematic structural diagram of a brightness adjustment device according to another embodiment of the present application. Fig. 12 is different from fig. 10 in that the brightness adjustment apparatus 300 shown in fig. 12 may further include a third adjustment module 306, an acquisition module 307, and a data scaling module 308.
The third adjusting module 306 is configured to adjust the gamma register value to make the display brightness of the display panel under any condition of the average pixel value be the third target brightness when the global voltage drop compensation function of the display panel is turned on.
The third target brightness includes one of a third brightness and a fourth brightness, the fourth brightness being less than the third brightness.
The obtaining module 307 may be used to obtain the real-time average pixel value.
The data scaling module 308 may be configured to control the display panel to invoke a data scaling function to scale down or up a gray level value corresponding to the third target brightness to a target gray level value when the real-time average pixel value is within the target average pixel value range.
The target gray-scale value corresponds to a fourth target luminance, which includes the other of the third luminance and the fourth luminance.
The control module 304 can be used to control the display panel to display according to the target gray scale value.
In some embodiments, the target range of average pixel values is a range greater than the target low average pixel value, and the third target brightness comprises a third brightness. The gray-scale value of the display panel under the condition of the non-target average pixel value range is a first gray-scale value.
Data scaling module 308 may be operable to: calculating to obtain a gray scale down value according to the maximum gray scale value, the gamma value, the third brightness and the fourth brightness; and controlling the display panel to call a data scaling function, and scaling down the gray scale value corresponding to the third target brightness to a target gray scale value, wherein the target gray scale value is the difference value between the gray scale value corresponding to the third target brightness and the gray scale down-regulation value.
In some embodiments, the target range of average pixel values is a range of less than or equal to the target low average pixel value, and the third target brightness comprises a fourth brightness. The gray-scale value of the display panel under the condition of the non-target average pixel value range is the second gray-scale value.
Data scaling module 308 may be operative to: calculating to obtain a gray scale up value according to the maximum gray scale value, the gamma value, the third brightness and the fourth brightness; and controlling the display panel to call a data scaling function, and amplifying the gray scale value corresponding to the third target brightness into a target gray scale value, wherein the target gray scale value is the sum of the initial gray scale value and a gray scale up-regulation value, and the initial gray scale value corresponds to the target dynamic brightness value.
In some examples, the second gray-scale adjustment value includes a gray-scale down value or a gray-scale up value, and the second gray-scale adjustment value G2, the maximum gray-scale value Gm, the gamma value γ, the third luminance L3, and the fourth luminance L4 satisfy the following condition:
Figure BDA0003762574020000191
in some examples, the second grayscale value is less than the first grayscale value.
In some examples, the target dynamic luminance value is a lower limit value of the highlight dynamic luminance range.
In some embodiments, the obtaining module 307 may be configured to: and under the condition that the obtained real-time dynamic brightness value is within the highlight dynamic brightness range, obtaining a real-time average pixel value, wherein the upper limit value of the highlight dynamic brightness range is the maximum value of the dynamic brightness.
In some examples, the first grayscale value is the maximum grayscale value with the display panel at the dynamic luminance maximum.
In some embodiments, the computing module may be further configured to: under the condition that the real-time dynamic brightness value is within the highlight dynamic brightness range, obtaining third brightness by utilizing an interpolation algorithm according to the real-time dynamic brightness value, the upper limit value of the highlight dynamic brightness range, the lower limit value of the highlight dynamic brightness range, the first target brightness and the fifth target brightness; and obtaining fourth brightness by utilizing an interpolation algorithm according to the real-time dynamic brightness value, the upper limit value of the highlight dynamic brightness range, the lower limit value of the highlight dynamic brightness range, the fifth target brightness and the sixth target brightness.
The first target brightness is the display brightness of the display panel under the condition that the display panel is at the upper limit value of the highlight dynamic brightness range and is in the range smaller than or equal to the target low average pixel value. The fifth target luminance is the display luminance of the display panel at the lower limit value of the highlight dynamic luminance range. The sixth target luminance is display luminance under the condition that the display panel is at the upper limit value of the highlight dynamic luminance range and within a range larger than the target low average pixel value.
In some embodiments, the third adjustment module 306 may be configured to: and adjusting the gamma register value corresponding to the target low average pixel value when the display panel is in the condition of the maximum dynamic brightness.
The third aspect of the present application also provides a luminance adjustment apparatus. Fig. 13 is a schematic structural diagram of a brightness adjustment device according to an embodiment of the present application. As shown in fig. 13, the brightness adjustment apparatus 400 includes a memory 401, a processor 402, and a computer program stored on the memory 401 and executable on the processor 402.
In one example, the processor 402 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 401 may include Read-Only Memory (ROM), random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash Memory devices, electrical, optical, or other physical/tangible Memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software comprising 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 brightness adjustment methods in accordance with embodiments of the present application.
The processor 402 runs a computer program corresponding to the executable program code by reading the executable program code stored in the memory 401 for implementing the brightness adjustment method in the above-described embodiment.
In one example, brightness adjustment device 400 may also include a communication interface 403 and a bus 404. As shown in fig. 13, the memory 401, the processor 402, and the communication interface 403 are connected by a bus 404 to complete communication therebetween.
The communication interface 403 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present application. Input devices and/or output devices may also be accessed through communication interface 403.
Bus 404 comprises hardware, software, or both that couple the components of model issuing device 400 to each other in a distributed system. By way of example and not limitation, bus 404 may include an Accelerated Graphics Port (AGP) or other Graphics Bus, an Enhanced Industrial Standard Architecture (EISA) Bus, a Front Side Bus (Front Side Bus, FSB), a HyperTransport (HT) Interconnect, an Industrial Standard Architecture (ISA) Bus, an infiniband Interconnect, a Low Pin Count (LPC) Bus, a memory Bus, a MicroChannel Architecture (MCA) Bus, a Peripheral Component Interconnect (PCI) Bus, a PCI-Express (PCI-E) Bus, a Serial Advanced Technology Attachment (Serial Advanced Technology Attachment, audio) Bus, a Local Electronics Standard Architecture (SATA) Local area Electronics Association, a vlsecurity Association, or a combination of two or more of these buses, as appropriate. Bus 404 may include one or more buses, where appropriate. Although specific buses are described and shown in the embodiments of the application, any suitable buses or interconnects are contemplated by the application.
The brightness adjustment device in the above embodiments may be implemented as a driving IC or other device in a display panel, and is not limited herein.
A fourth aspect of the present application further provides a computer-readable storage medium, where computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are executed by a processor, the brightness adjusting method in the foregoing embodiments can be implemented, and the same technical effects can be achieved, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may include a non-transitory computer-readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like, which is not limited herein.
An embodiment of the present application may further provide a computer program product, where when an instruction in the computer program product is executed by a processor of an electronic device, the electronic device may execute the brightness adjustment method in the foregoing embodiment, and the same technical effect may be achieved, and details are not repeated here to avoid repetition.
A fifth aspect of the present application further provides a display panel, where the display panel may include the brightness adjustment device in the foregoing embodiment, and specific contents may refer to related contents in the foregoing embodiment, which are not described herein again. The display panel may be a component having a display function in a device such as a mobile phone, a computer, a tablet computer, a television, and electronic paper, and is not limited herein.
A sixth aspect of the present application further provides a display device, where the display device may include the display panel in the foregoing embodiment, and specific contents may refer to related contents in the foregoing embodiment, which are not described herein again. The display device may be a device with a display function, such as a mobile phone, a computer, a tablet computer, a television, and electronic paper, and is not limited herein.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For apparatus embodiments, device embodiments, computer-readable storage medium embodiments, computer program product embodiments, display panel embodiments and display apparatus embodiments, reference may be made to the description of the method embodiments for their relevance. The present application is not limited to the particular steps and structures described above and shown in the drawings. Those skilled in the art may make various changes, modifications and additions or change the order between the steps after appreciating the spirit of the present application. Also, a detailed description of known techniques is omitted herein for the sake of brevity.
Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware for performing the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed subject matter, from a study of the drawings, the disclosure, and the appended claims. In the claims, the term "comprising" does not exclude other means or steps; the word "a" or "an" does not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The functions of the parts appearing in the claims may be implemented by one single hardware or software module. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Claims (21)

1. A luminance adjustment method, characterized by comprising:
adjusting a gamma register value corresponding to a target low average pixel value of a display panel to enable the display brightness of the display panel under the condition of the target low average pixel value to be a first target brightness, and adjusting the display brightness of the display panel under the condition of the target low average pixel value to be a second target brightness before adjustment, wherein the second target brightness is smaller than the first target brightness, and the target low average pixel value is smaller than or equal to 15%;
acquiring a real-time average pixel value and a gamma value, and obtaining a first gray scale adjustment value based on the real-time average pixel value and the gamma value;
reducing the gray scale value corresponding to the target low average pixel value by the first gray scale adjustment value to obtain a gray scale value corresponding to the real-time average pixel value;
and controlling the display panel to display according to the gray-scale value corresponding to the real-time average pixel value.
2. The method of claim 1, wherein the gray scale value of the display panel under the condition of the target low average pixel value is a maximum gray scale value,
obtaining a first gray scale adjustment value based on the real-time average pixel value and the gamma value, including:
obtaining a first brightness and a second brightness based on the real-time average pixel value, wherein the first brightness is a display brightness of the display panel corresponding to the real-time average pixel value in an expected brightness corresponding relationship, the second brightness is a display brightness of the display panel under the condition of the real-time average pixel value after adjustment, the expected brightness corresponding relationship comprises a linear relationship among the target low average pixel value, the first target brightness, a maximum average pixel value and a preset target brightness, and the preset target brightness is a display brightness of the display panel under the condition of the maximum average pixel value before adjustment;
and calculating to obtain the first gray scale adjustment value according to the first brightness, the second brightness, the maximum gray scale value and the gamma value.
3. The method of claim 1, wherein the real-time average pixel value is positively correlated with the first gamma adjustment value.
4. The method of claim 2,
the first luminance L1, the second luminance L2, the maximum gray scale value Gm, the gamma value γ, and the first gray scale adjustment value G1 satisfy the following conditions:
Figure FDA0003762574010000021
5. the method of claim 2, wherein the reducing the first gray scale adjustment value for the gray scale value corresponding to the target low average pixel value to obtain the gray scale value corresponding to the real-time average pixel value comprises:
when the real-time average pixel value is larger than the target low average pixel value, subtracting the first gray scale adjustment value from the maximum gray scale value to obtain a gray scale value corresponding to the real-time average pixel value;
the method further comprises the following steps:
and determining the maximum gray-scale value as the gray-scale value corresponding to the real-time average pixel value under the condition that the real-time average pixel value is less than or equal to the target low average pixel value.
6. The method of claim 1, wherein prior to adjusting the gamma register value corresponding to the target low average pixel value in the display panel, comprising:
and when the global voltage drop compensation GIR function of the display panel is started, closing the GIR function.
7. The method of claim 1, further comprising:
under the condition that the global voltage drop compensation function of the display panel is started, adjusting the gamma register value to enable the display brightness of the display panel under the condition of any average pixel value to be a third target brightness, wherein the third target brightness comprises one of the third brightness and a fourth brightness, and the fourth brightness is smaller than the third brightness;
acquiring the real-time average pixel value, and controlling the display panel to call a data scaling function to scale down or up a gray scale value corresponding to the third target brightness to a target gray scale value under the condition that the real-time average pixel value is within a target average pixel value range, wherein the target gray scale value corresponds to a fourth target brightness, and the fourth target brightness comprises the other one of the third brightness and the fourth brightness;
and controlling the display panel to display according to the target gray scale value.
8. The method of claim 7, wherein the target average pixel value range is a range greater than the target low average pixel value, wherein the third target luminance comprises the third luminance, wherein the gray level value of the display panel within the non-target average pixel value range is a first gray level value,
the controlling the display panel to call a data scaling function to reduce or enlarge the gray scale value corresponding to the third target brightness to a target gray scale value includes:
calculating to obtain a gray scale down value according to the maximum gray scale value, the gamma value, the third brightness and the fourth brightness;
and controlling the display panel to call a data scaling function, and reducing the gray scale value corresponding to the third target brightness into the target gray scale value, wherein the target gray scale value is the difference value between the gray scale value corresponding to the third target brightness and the gray scale down-regulation value.
9. The method of claim 7, wherein the target average pixel value range is a range of less than or equal to the target low average pixel value, the third target luminance comprises the fourth luminance, the gray level value of the display panel within the non-target average pixel value range is a second gray level value,
the controlling the display panel to call a data scaling function and reduce or enlarge the gray scale value corresponding to the third target brightness to a target gray scale value includes:
calculating to obtain a gray scale up value according to the maximum gray scale value, the gamma value, the third brightness and the fourth brightness;
and controlling the display panel to call a data zooming function, and amplifying the gray scale value corresponding to the third target brightness into the target gray scale value, wherein the target gray scale value is the sum of an initial gray scale value and the gray scale up-regulating value, and the initial gray scale value corresponds to the target dynamic brightness value.
10. The method according to claim 8 or 9, wherein the second gray-scale adjustment value comprises the gray-scale down-adjustment value or the gray-scale up-adjustment value, and wherein the second gray-scale adjustment value G2, the maximum gray-scale value Gm, the gamma value γ, the third brightness L3, and the fourth brightness L4 satisfy the following condition:
Figure FDA0003762574010000031
11. the method of claim 9, wherein the second gray scale value is less than the first gray scale value.
12. The method of claim 9, wherein the target dynamic luminance value is a lower limit value of a highlight dynamic luminance range.
13. The method of claim 8 or 9, wherein said obtaining the real-time average pixel value comprises:
and under the condition that the obtained real-time dynamic brightness value is within a highlight dynamic brightness range, obtaining the real-time average pixel value, wherein the upper limit value of the highlight dynamic brightness range is the maximum value of the dynamic brightness.
14. The method according to claim 8 or 9, wherein the first gray-scale value is the maximum gray-scale value when the display panel is at the maximum dynamic brightness value.
15. The method of claim 13, further comprising:
under the condition that the real-time dynamic brightness value is within a highlight dynamic brightness range, obtaining third brightness by utilizing an interpolation algorithm according to the real-time dynamic brightness value, the upper limit value of the highlight dynamic brightness range, the lower limit value of the highlight dynamic brightness range, the first target brightness and a fifth target brightness;
obtaining the fourth brightness by utilizing an interpolation algorithm according to the real-time dynamic brightness value, the upper limit value of the highlight dynamic brightness range, the lower limit value of the highlight dynamic brightness range, the fifth target brightness and the sixth target brightness,
the first target brightness is display brightness of the display panel in the upper limit value of a high-brightness dynamic brightness range and in the range smaller than or equal to the target low average pixel value, the fifth target brightness is display brightness of the display panel in the lower limit value of the high-brightness dynamic brightness range, and the sixth target brightness is display brightness of the display panel in the upper limit value of the high-brightness dynamic brightness range and in the range larger than the target low average pixel value.
16. The method of claim 7, wherein adjusting the gamma register value corresponding to the target low average pixel value in the display panel comprises:
and adjusting the gamma register value corresponding to the target low average pixel value when the display panel is in the condition of the maximum dynamic brightness value.
17. A luminance adjustment device, characterized by comprising:
a first adjusting module, configured to adjust a gamma register value corresponding to a target low average pixel value of a display panel, so that a display brightness of the display panel under the condition of the target low average pixel value is a first target brightness, and before adjustment, the display brightness of the display panel under the condition of the target low average pixel value is a second target brightness, where the second target brightness is smaller than the first target brightness, and the target low average pixel value is smaller than or equal to 15%;
the calculation module is used for acquiring a real-time average pixel value and a gamma value and obtaining a first gray scale adjustment value based on the real-time average pixel value and the gamma value;
the second adjusting module is used for increasing or decreasing the gray-scale value corresponding to the target low average pixel value by the first gray-scale adjusting value to obtain a gray-scale value corresponding to the real-time average pixel value;
and the control module is used for controlling the display panel to display according to the gray-scale value corresponding to the real-time average pixel value.
18. A luminance adjustment apparatus characterized by comprising: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements a brightness adjustment method as claimed in any one of claims 1 to 16.
19. A computer-readable storage medium, having computer program instructions stored thereon, which, when executed by a processor, implement the brightness adjustment method according to any one of claims 1 to 16.
20. A display panel comprising the luminance adjusting apparatus as claimed in claim 18.
21. A display device comprising the display panel according to claim 20.
CN202210876079.9A 2022-07-25 2022-07-25 Brightness adjusting method, device, equipment, medium, display panel and display device Pending CN115206224A (en)

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060104238A (en) * 2005-03-29 2006-10-09 엘지전자 주식회사 Image processing device and method for plasma display panel
KR20080004841A (en) * 2006-07-06 2008-01-10 엘지전자 주식회사 Plasma display apparatus and image processing method thereof
JP2009265114A (en) * 2008-04-21 2009-11-12 Sharp Corp Liquid crystal display device
CN105096827A (en) * 2015-08-14 2015-11-25 京东方科技集团股份有限公司 Gamma curve adjusting method and device
CN105491310A (en) * 2014-10-01 2016-04-13 Lg电子株式会社 Image display apparatus
KR20170026909A (en) * 2015-08-31 2017-03-09 엘지디스플레이 주식회사 Display device and luminance control method thereof
WO2018040227A1 (en) * 2016-08-30 2018-03-08 武汉华星光电技术有限公司 Display apparatus and brightness adjustment method therefor
CN109192174A (en) * 2018-11-05 2019-01-11 惠科股份有限公司 A kind of driving method of display panel, driving device and display device
CN112071267A (en) * 2020-09-21 2020-12-11 Oppo（重庆）智能科技有限公司 Brightness adjusting method, brightness adjusting device, terminal equipment and storage medium
CN112435636A (en) * 2020-11-27 2021-03-02 北京集创北方科技股份有限公司 Display control method, device, equipment and storage medium
CN112992065A (en) * 2021-04-22 2021-06-18 昆山国显光电有限公司 Brightness adjusting method and device for display panel and computer readable storage medium
CN114283745A (en) * 2021-12-28 2022-04-05 昆山国显光电有限公司 Brightness compensation method of display panel and related device

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060104238A (en) * 2005-03-29 2006-10-09 엘지전자 주식회사 Image processing device and method for plasma display panel
KR20080004841A (en) * 2006-07-06 2008-01-10 엘지전자 주식회사 Plasma display apparatus and image processing method thereof
JP2009265114A (en) * 2008-04-21 2009-11-12 Sharp Corp Liquid crystal display device
CN105491310A (en) * 2014-10-01 2016-04-13 Lg电子株式会社 Image display apparatus
CN105096827A (en) * 2015-08-14 2015-11-25 京东方科技集团股份有限公司 Gamma curve adjusting method and device
KR20170026909A (en) * 2015-08-31 2017-03-09 엘지디스플레이 주식회사 Display device and luminance control method thereof
WO2018040227A1 (en) * 2016-08-30 2018-03-08 武汉华星光电技术有限公司 Display apparatus and brightness adjustment method therefor
CN109192174A (en) * 2018-11-05 2019-01-11 惠科股份有限公司 A kind of driving method of display panel, driving device and display device
CN112071267A (en) * 2020-09-21 2020-12-11 Oppo（重庆）智能科技有限公司 Brightness adjusting method, brightness adjusting device, terminal equipment and storage medium
CN112435636A (en) * 2020-11-27 2021-03-02 北京集创北方科技股份有限公司 Display control method, device, equipment and storage medium
CN112992065A (en) * 2021-04-22 2021-06-18 昆山国显光电有限公司 Brightness adjusting method and device for display panel and computer readable storage medium
CN114283745A (en) * 2021-12-28 2022-04-05 昆山国显光电有限公司 Brightness compensation method of display panel and related device

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