CN113362781A - Brightness compensation method and brightness compensation system of display panel - Google Patents
Brightness compensation method and brightness compensation system of display panel Download PDFInfo
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- CN113362781A CN113362781A CN202110699948.0A CN202110699948A CN113362781A CN 113362781 A CN113362781 A CN 113362781A CN 202110699948 A CN202110699948 A CN 202110699948A CN 113362781 A CN113362781 A CN 113362781A
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The invention discloses a brightness compensation method and a brightness compensation system of a display panel. The brightness compensation method of the display panel comprises the following steps: configuring a display panel to display a test screen; acquiring a brightness distribution image of an actual display picture of a display panel; classifying the brightness distribution image according to the brightness variation trend, and confirming the brightness distribution type corresponding to the brightness distribution image; obtaining a corresponding brightness compensation code according to the brightness distribution category; and performing brightness compensation on the display panel according to the brightness compensation code. According to the brightness compensation method of the display panel, the brightness uniformity of the display panel after compensation is further improved.
Description
Technical Field
The invention relates to the field of display, in particular to a brightness compensation method and a brightness compensation system of a display panel.
Background
With the rapid development of electronic devices, users have a higher demand for uniformity of brightness of display panels. The display panel includes a display area and a non-display area surrounding the periphery of the display area, the non-display area is provided with a driving chip, and the driving chip is often located on one side of the display area. Under the asymmetrical driving source arrangement, the voltage drop caused by different wire resistances exists at the near driving chip end and the far driving chip end, so that the display panel has the problem of poor brightness uniformity.
Disclosure of Invention
The invention provides a brightness compensation method and a brightness compensation system of a display panel, which improve the brightness uniformity of the display panel.
In one aspect, an embodiment of the present invention provides a method for compensating brightness of a display panel, including: configuring a display panel to display a test screen; acquiring a brightness distribution image of an actual display picture of a display panel; classifying the brightness distribution image according to the brightness variation trend, and confirming the brightness distribution type corresponding to the brightness distribution image; obtaining a corresponding brightness compensation code according to the brightness distribution category; and performing brightness compensation on the display panel according to the brightness compensation code.
According to the brightness compensation method of the display panel, the brightness distribution image is classified according to the brightness change trend, and then more accurate brightness compensation is carried out according to the brightness distribution type. Compared with a mode of adopting uniform compensation codes without classification, the brightness uniformity of the display panel after compensation is further improved.
According to some of the foregoing embodiments of an aspect of the present invention, classifying the luminance distribution image according to the luminance variation tendency, and confirming the luminance distribution category corresponding to the luminance distribution image includes: generating an average vector of the brightness distribution gradient vector according to the brightness distribution image, wherein the average vector is a space vector; and classifying the brightness distribution image according to the average vector, and confirming the brightness distribution type corresponding to the brightness distribution image.
According to some of the foregoing embodiments of an aspect of the present invention, classifying the luminance distribution image according to the average vector, and determining a luminance distribution category corresponding to the luminance distribution image includes: the method comprises the steps of presetting a classification mapping model, wherein the classification mapping model comprises a plurality of preset classifications and a plurality of parameter ranges, and the plurality of preset classifications correspond to the plurality of parameter ranges one by one; and determining the brightness distribution category corresponding to the brightness distribution image corresponding to the corresponding preset classification according to the parameter range of the parameters of the average vector.
According to some of the foregoing embodiments of an aspect of the present invention, classifying the luminance distribution image according to the average vector comprises: the luminance distribution image is classified at least according to the direction of the component of the average vector on the display surface of the display panel.
According to some of the foregoing embodiments of an aspect of the present invention, the display panel includes a plurality of scan lines and a plurality of data lines, each scan line extends in a first direction on the display surface, each data line extends in a second direction on the display surface, the second direction intersects with the first direction, and in the step of presetting the classification mapping model, each parameter range includes a range of an angle parameter, and the angle parameter is an angle between a direction of a component of the average vector on the display surface and the second direction.
According to some embodiments of an aspect of the present invention, in the step of presetting the classification mapping model, the-45 ° to 45 ° are equally divided into N parts as ranges of the included angle parameter of the plurality of parameter ranges, respectively, the number of the preset classifications is N, and N is an integer greater than or equal to 2.
According to some of the foregoing embodiments of an aspect of the present invention, classifying the luminance distribution image according to the average vector comprises: and classifying the brightness distribution image at least according to the component of the average vector on the brightness size, wherein in the step of presetting the classification mapping model, each parameter range comprises a range of the brightness parameter, and the brightness parameter is the component of the average vector on the brightness size.
According to some of the foregoing embodiments of an aspect of the present invention, deriving the corresponding illumination compensation code according to the illumination distribution category includes: the method comprises the steps of presetting a code base, wherein the code base comprises a plurality of preset codes, and the preset codes correspond to a plurality of preset classifications one by one; and obtaining a corresponding brightness compensation code according to the determined brightness distribution type and a preset code library.
In another aspect, an embodiment of the present invention provides a system for compensating brightness of a display panel, including: the brightness measurement module is used for acquiring a brightness distribution image of an actual display picture of the display panel; the brightness trend classification module is used for classifying the brightness distribution image according to the brightness change trend and confirming the brightness distribution category corresponding to the brightness distribution image; the code module is used for obtaining a corresponding brightness compensation code according to the brightness distribution type; and the compensation module is used for performing brightness compensation on the display panel according to the brightness compensation code.
The brightness compensation system of the display panel comprises a brightness trend classification module, wherein the brightness trend classification module can classify a brightness distribution image according to a brightness change trend, the code module obtains a corresponding brightness compensation code according to the brightness distribution category, and the compensation module can perform brightness compensation on the display panel according to the brightness compensation code which is more in fit with the brightness trend of the display panel, so that the brightness compensation is more accurate, and the brightness uniformity of the compensated display panel is further improved.
According to some embodiments of another aspect of the present invention, the brightness trend classification module can preset a classification mapping model, the classification mapping model includes a plurality of preset classifications and a plurality of parameter ranges, the plurality of preset classifications correspond to the plurality of parameter ranges one by one, and the code module includes: the code generation module is used for presetting a code base, wherein the code base comprises a plurality of preset codes, and the plurality of preset codes correspond to the plurality of preset classifications one to one; and the code selection module is used for obtaining a corresponding brightness compensation code according to the determined brightness distribution type and a preset code library.
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Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 is a flow chart of one embodiment of a method for brightness compensation of a display panel according to the present invention;
FIG. 2 is a top view of a luminance distribution image in an embodiment of a luminance compensation method of a display panel according to the present invention;
FIG. 3 is a flowchart of a step of classifying a luminance distribution image according to a luminance variation trend in an embodiment of a luminance compensation method of a display panel according to the present invention;
FIG. 4 is a top view of a luminance distribution image after generating an average vector of luminance distribution gradient vectors in an embodiment of a luminance compensation method of a display panel according to the present invention;
FIG. 5 is a flowchart of a classification step of a luminance distribution image according to an average vector in an embodiment of a luminance compensation method of a display panel according to the present invention;
FIG. 6 is a flowchart of a step of obtaining corresponding brightness compensation codes according to brightness distribution categories in an embodiment of a brightness compensation method of a display panel according to the present invention;
fig. 7 is a block diagram of an embodiment of a brightness compensation system of a display panel according to the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention 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 merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention 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 invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Fig. 1 is a flowchart of an embodiment of a brightness compensation method of a display panel according to the present invention. In this embodiment, the method for compensating the brightness of the display panel includes steps S100 to S500. In some embodiments, before performing the brightness compensation, a gamma (gamma) correction step for the display panel may be performed, that is, the display panel is gamma-modulated by the gamma correction module.
In step S100, the display panel is configured to display a test screen. Optionally, the test picture is a monochrome picture.
In step S200, a luminance distribution image of the actual display screen of the display panel is acquired. Fig. 2 is a top view of a luminance distribution image in an embodiment of a luminance compensation method of a display panel according to the present invention. In fig. 2, each cell represents one sub-display unit of the display panel, each sub-display unit including a predetermined number of pixels. For example, in the present embodiment, each sub-display unit includes one pixel. In fig. 2, the number in each lattice represents the actual luminance value of the sub-display unit, wherein a larger number represents a higher luminance.
In step S300, the luminance distribution image is classified according to the luminance variation trend, and the luminance distribution category corresponding to the luminance distribution image is confirmed.
FIG. 3 is a flowchart of a step of classifying the brightness distribution image according to the brightness variation trend in an embodiment of the brightness compensation method of the display panel according to the present invention. In some embodiments, step S300 includes steps S310 to S320.
In step S310, an average vector of the luminance distribution gradient vectors is generated from the luminance distribution image, and the average vector is a spatial vector. Specifically, based on the actual luminance values of the sub display units on the luminance distribution image, luminance distribution gradient vectors, which are all spatial vectors, can be generated. From these luminance distribution gradient vectors, an average vector thereof can be obtained.
Fig. 4 is a top view of a luminance distribution image after generating an average vector of luminance distribution gradient vectors in an embodiment of a luminance compensation method of a display panel according to the present invention. In the top view of fig. 4, the component of the average vector on the display surface of the display panel can be displayed, but the actual average vector also includes the component of the luminance magnitude.
In step S320, the luminance distribution image is classified according to the average vector, and the luminance distribution category corresponding to the luminance distribution image is confirmed.
FIG. 5 is a flowchart of a step of classifying the brightness distribution image according to the average vector in an embodiment of the brightness compensation method of the display panel according to the present invention. In some embodiments, step S320 includes step S321 to step S322.
In step S321, a classification mapping model is preset, where the classification mapping model includes a plurality of preset classifications and a plurality of parameter ranges, and the plurality of preset classifications correspond to the plurality of parameter ranges one to one.
In step S322, a brightness distribution category corresponding to the preset classification as the brightness distribution image is determined according to the parameter range to which the parameter of the average vector belongs.
In the present embodiment, classifying the luminance distribution image according to the average vector includes: the luminance distribution image is classified at least according to the direction of the component of the average vector on the display surface of the display panel.
As shown in fig. 4, in some embodiments, the display panel includes a plurality of scan lines each extending in a first direction X on the display surface and a plurality of data lines each extending in a second direction Y on the display surface, the second direction Y intersecting the first direction X. In step S321 of presetting the classification mapping model, each parameter range includes a range of an included angle parameter, and the included angle parameter is an included angle between the direction of the component of the average vector on the display surface and the second direction Y. In fig. 4, an angle parameter D1 of the average vector in the present embodiment is shown.
Optionally, in the step of presetting the classification mapping model, the-45 ° to 45 ° are equally divided into N parts, which are respectively used as the range of the included angle parameter of the plurality of parameter ranges, the number of the preset classifications is N, and N is an integer greater than or equal to 2. For example, in this embodiment, in the step of presetting the classification mapping model, the-45 ° to 45 ° may be equally divided into 3 parts, and the preset classifications include a first preset classification, a second preset classification and a third preset classification, where the first preset classification corresponds to the parameter range of the included angle being greater than or equal to-45 ° and less than-15 °, the second preset classification corresponds to the parameter range of the included angle being greater than or equal to-15 ° and less than or equal to 15 °, and the third preset classification corresponds to the parameter range of the included angle being greater than or equal to 15 ° and less than or equal to 45 °. As shown in fig. 4, when the angle parameter D1 of the average vector is in the range of greater than 15 ° and equal to or less than 45 °, the third preset classification is determined as the brightness distribution category to which the brightness distribution image corresponds. In the step of presetting the classification mapping model, the parameter range corresponding to each preset classification is only an example, and in other embodiments, for example, the-45 ° to 45 ° may be divided into other numbers of parts, such as 4 parts, 5 parts, and the like, so that the preset classification is further refined, and the accuracy of the brightness compensation is improved.
In the above embodiment, the classifying the luminance distribution image according to the average vector includes: the luminance distribution image is classified according to the direction of the component of the average vector on the display surface of the display panel. However, the classification manner may not be limited to the above example. For example, in some embodiments, classifying the luminance distribution image according to the average vector comprises: the luminance distribution image is classified at least according to the component of the average vector in the luminance magnitude. That is, in some embodiments, classifying the luminance distribution image according to the average vector includes classifying the luminance distribution image according to a component of the average vector in luminance magnitude; or in some embodiments, classifying the luminance distribution image according to the average vector comprises: and classifying the brightness distribution image according to the direction of the components of the average vector on the display surface of the display panel and the components of the average vector on the brightness, so that the brightness uniformity of the compensated display panel is better.
When the luminance distribution image is classified at least according to the component of the average vector in the luminance size, in the step of presetting the classification mapping model, each parameter range includes a range of the luminance parameter, and the luminance parameter is the component of the average vector in the luminance size.
As shown in fig. 1, in step S400, a corresponding luminance compensation code is obtained according to the luminance distribution type.
FIG. 6 is a flowchart of a step of obtaining a corresponding brightness compensation code according to a brightness distribution category in an embodiment of a brightness compensation method for a display panel according to the present invention. In some embodiments, step S400 includes steps S410 to S420.
In step S410, a code library is preset, where the code library includes a plurality of preset codes, and the preset codes correspond to the preset classifications one to one.
In step S420, a corresponding brightness compensation code is obtained according to the determined brightness distribution category and a preset code library. Therefore, the brightness compensation code which is more matched with the brightness variation trend of the display panel can be obtained.
In step S500, the display panel is luminance-compensated according to the luminance compensation code.
According to the brightness compensation method of the display panel, the brightness distribution image is classified according to the brightness change trend, and then more accurate brightness compensation is carried out according to the brightness distribution type. Compared with a mode of adopting uniform compensation codes without classification, the brightness uniformity of the display panel after compensation is further improved.
The embodiment of the invention also provides a brightness compensation system of the display panel, which is used for performing brightness compensation on the display panel.
Fig. 7 is a block diagram of an embodiment of a brightness compensation system of a display panel according to the present invention. In the present embodiment, the brightness compensation system includes a brightness measurement module 110, a brightness trend classification module 120, a code module 130, and a compensation module 140.
The brightness measurement module 110 is used to obtain a brightness distribution image of an actual display frame of the display panel, and in some embodiments, the brightness measurement module 110 is, for example, an optical image capturing device. The brightness trend classification module 120 is configured to classify the brightness distribution image according to the brightness variation trend, and determine a brightness distribution category corresponding to the brightness distribution image. The code module 130 is configured to obtain a corresponding brightness compensation code according to the brightness distribution category. The compensation module 140 is used for performing brightness compensation on the display panel according to the brightness compensation code.
The brightness compensation system of the display panel according to the embodiment of the present invention includes a brightness trend classification module 120, the brightness trend classification module 120 can classify the brightness distribution image according to the brightness variation trend, the code module 130 obtains the corresponding brightness compensation code according to the brightness distribution category, and the compensation module 140 can perform brightness compensation on the display panel according to the brightness compensation code that is more suitable for the brightness trend of the display panel, so that the brightness compensation is more accurate, and the brightness uniformity of the compensated display panel is further improved.
Optionally, the brightness compensation system may further include a gamma calibration module, and the gamma calibration module is configured to perform gamma correction on the display panel, that is, perform gamma modulation on the display panel through the gamma correction module.
Alternatively, the luminance trend classification module 120 can generate an average vector of the luminance distribution gradient vectors from the luminance distribution image, the average vector being a spatial vector. In addition, the luminance trend classification module 120 can classify the luminance distribution image according to the average vector, and determine the luminance distribution category corresponding to the luminance distribution image. For example, the luminance trend classification module 120 may first preset a classification mapping model, where the classification mapping model includes a plurality of preset classifications and a plurality of parameter ranges, and the plurality of preset classifications correspond to the plurality of parameter ranges one to one. On the basis of having the preset classification mapping model, the luminance trend classification module 120 can determine the luminance distribution category corresponding to the corresponding preset classification of the luminance distribution image according to the parameter range to which the parameter of the average vector belongs.
In some embodiments, classifying the luminance distribution image according to the average vector comprises: the luminance distribution image is classified at least according to the direction of the component of the average vector on the display surface of the display panel. In some embodiments, in the above embodiments, classifying the luminance distribution image according to the average vector comprises: the luminance distribution image is classified at least according to the component of the average vector in the luminance magnitude.
As in fig. 7, in some embodiments, code module 130 includes a code generation module 131 and a code selection module 132. The code generation module 131 is configured to preset a code library, where the code library includes a plurality of preset codes, and the preset codes correspond to the preset categories one to one. The code selection module 132 is configured to obtain a corresponding brightness compensation code according to the determined brightness distribution category and a preset code library. The brightness compensation code is accurately selected from the preset code base according to the confirmed brightness distribution category, so that the brightness compensation code is more in accordance with the brightness change trend of the display panel, the brightness compensation is more accurate, and the compensated display panel has better brightness uniformity.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A method for compensating brightness of a display panel, comprising:
configuring the display panel to display a test screen;
acquiring a brightness distribution image of an actual display picture of the display panel;
classifying the brightness distribution image according to the brightness change trend, and confirming the brightness distribution category corresponding to the brightness distribution image;
obtaining a corresponding brightness compensation code according to the brightness distribution category; and
and performing brightness compensation on the display panel according to the brightness compensation code.
2. The method according to claim 1, wherein the classifying the brightness distribution image according to the brightness variation trend, and the determining the brightness distribution category corresponding to the brightness distribution image comprises:
generating an average vector of a brightness distribution gradient vector according to the brightness distribution image, wherein the average vector is a space vector;
and classifying the brightness distribution image according to the average vector, and confirming the brightness distribution category corresponding to the brightness distribution image.
3. The method of claim 2, wherein the classifying the brightness distribution image according to the average vector and the determining the brightness distribution category corresponding to the brightness distribution image comprises:
the method comprises the steps of presetting a classification mapping model, wherein the classification mapping model comprises a plurality of preset classifications and a plurality of parameter ranges, and the preset classifications correspond to the parameter ranges one by one;
and determining the brightness distribution category corresponding to the preset classification as the brightness distribution image according to the parameter range to which the parameter of the average vector belongs.
4. The method of claim 3, wherein the classifying the brightness distribution image according to the average vector comprises:
the luminance distribution image is classified according to at least a direction of a component of the average vector on a display surface of the display panel.
5. The luminance compensation method of a display panel according to claim 4, wherein the display panel includes a plurality of scan lines each extending in a first direction on the display surface and a plurality of data lines each extending in a second direction on the display surface, the second direction crossing the first direction,
in the step of presetting the classification mapping model, each parameter range comprises a range of an included angle parameter, and the included angle parameter is an included angle between the direction of the component of the average vector on the display surface and the second direction.
6. The luminance compensation method of a display panel according to claim 5, wherein in the step of mapping the preset classification, the-45 ° to 45 ° are divided into N parts as the range of the angle parameter of the plurality of parameter ranges, respectively, the number of the preset classification is N, and N is an integer greater than or equal to 2.
7. The method of claim 3, wherein the classifying the brightness distribution image according to the average vector comprises:
classifying the luminance distribution image at least according to a component of the average vector in luminance magnitude,
in the step of presetting the classification mapping model, each of the parameter ranges includes a range of luminance parameters, and the luminance parameters are components of the average vector in luminance magnitude.
8. The method of claim 3, wherein the deriving the corresponding brightness compensation code according to the brightness distribution category comprises:
presetting a code base, wherein the code base comprises a plurality of preset codes, and the preset codes correspond to the preset classifications one by one;
and obtaining the corresponding brightness compensation code according to the determined brightness distribution type and the preset code library.
9. A system for compensating brightness of a display panel, comprising:
the brightness measurement module is used for acquiring a brightness distribution image of an actual display picture of the display panel;
the brightness trend classification module is used for classifying the brightness distribution image according to the brightness change trend and confirming the brightness distribution category corresponding to the brightness distribution image;
the code module is used for obtaining a corresponding brightness compensation code according to the brightness distribution type; and
and the compensation module is used for performing brightness compensation on the display panel according to the brightness compensation code.
10. The system of claim 9, wherein the brightness trend classification module is capable of presetting a classification mapping model, the classification mapping model comprises a plurality of preset classifications and a plurality of parameter ranges, the preset classifications correspond to the parameter ranges one by one,
the code module includes:
the code generation module is used for presetting a code base, wherein the code base comprises a plurality of preset codes, and the preset codes correspond to the preset classifications one by one; and
and the code selection module is used for obtaining the corresponding brightness compensation code according to the determined brightness distribution type and the preset code library.
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| CN114299841A (en) * | 2021-12-29 | 2022-04-08 | 合肥维信诺科技有限公司 | Screen brightness compensation method |
| CN114299841B (en) * | 2021-12-29 | 2023-11-24 | 合肥维信诺科技有限公司 | Screen brightness compensation method |
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