Display panel and display compensation method thereof

Abstract

The invention discloses a display panel and a display compensation method thereof, and the method comprises the steps: dividing a plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel, and determining a brightness and chrominance compensation table corresponding to the different light-emitting chip groups according to a brightness and chrominance target value, and then the brightness and chrominance of the corresponding light-emitting chip group are compensated based on the brightness and chrominance compensation table so as to control different light-emitting chip groups to have the same brightness and chrominance target value, brightness and chrominance compensation can be performed on the light-emitting chip groups with different parameters through the brightness and chrominance compensation table, and the brightness and chrominance display consistency of the light-emitting chips can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display compensation method thereof. Background Art

[0002] In direct display panels, in order to achieve display consistency of brightness and color, the lamp chips (light-emitting chips) are usually classified (Bin) and screened. Different types of light-emitting chips have color differences, which will bring differences in viewing experience. Summary of the invention

[0003] The present application provides a display panel and a display compensation method thereof to alleviate the technical problem that brightness and chromaticity display differences still exist between different types of light-emitting chips after classification and screening.

[0004] In a first aspect, the present application provides a display compensation method for a display panel, which includes multiple light-emitting chips that directly display a picture. The display compensation method includes: dividing the multiple light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel; determining a brightness and chromaticity compensation table corresponding to different light-emitting chip groups according to a brightness and chromaticity target value; and compensating the brightness and chromaticity of the corresponding light-emitting chip group based on the brightness and chromaticity compensation table.

[0005] In some of the embodiments, the step of dividing a plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel includes: obtaining the parameters of each light-emitting chip in the display panel; and dividing the plurality of light-emitting chips into different light-emitting chip groups according to the range to which the parameters of each light-emitting chip belong.

[0006] In some of the embodiments, the step of dividing multiple light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel includes: obtaining the parameters of each light-emitting chip in the display panel, where the parameter is the wavelength; and dividing the multiple light-emitting chips into different light-emitting chip groups according to the wavelength range of each light-emitting chip.

[0007] In some of the embodiments, the step of dividing a plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel includes: obtaining the parameters of each light-emitting chip in the display panel, the parameters being color coordinates; and dividing the plurality of light-emitting chips into different light-emitting chip groups according to the color coordinate range of each light-emitting chip.

[0008] In some embodiments, the step of determining brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to brightness and chromaticity target values ​​includes: obtaining brightness and chromaticity target values; and obtaining brightness and chromaticity compensation tables corresponding to each light-emitting chip group according to the same brightness and chromaticity target value.

[0009] In some of the embodiments, the step of obtaining the brightness and chromaticity target values ​​includes: obtaining the minimum brightness value of each light-emitting chip in different light-emitting chip groups as the brightness target value; obtaining the minimum chromaticity value of each light-emitting chip in different light-emitting chip groups as the chromaticity target value; determining the brightness target value and the chromaticity target value as the brightness and chromaticity target value.

[0010] In some of the embodiments, the step of determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target values ​​includes: determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups under a binding point grayscale according to the brightness and chromaticity target values; and obtaining the corresponding brightness and chromaticity compensation tables under other grayscales based on the brightness and chromaticity compensation table under the binding point grayscale.

[0011] In some of the embodiments, the step of determining brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target values ​​also includes: setting the same light-emitting chip group to include a light-emitting chip that displays red, a light-emitting chip that displays green, and a light-emitting chip that displays blue; and determining, according to the brightness and chromaticity target values, that light-emitting chips of different colors in the same light-emitting chip group use different brightness and chromaticity compensation tables.

[0012] In some embodiments, after the step of compensating the brightness and chromaticity of the corresponding light-emitting chip group based on the brightness and chromaticity compensation table, the step further includes: compensating each light-emitting chip by a brightness and chromaticity uniformity method.

[0013] In a second aspect, the present application provides a display panel, which executes the display compensation method in at least one of the above embodiments.

[0014] The display panel and display compensation method provided by the present application first divide a plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel, then determine the brightness and chromaticity compensation table corresponding to the different light-emitting chip groups according to the brightness and chromaticity target value, and then compensate the brightness and chromaticity of the corresponding light-emitting chip groups based on the brightness and chromaticity compensation table to control the different light-emitting chip groups to have the same brightness and chromaticity target value. The brightness and chromaticity compensation table can be used to perform brightness and chromaticity compensation on light-emitting chip groups with different parameters, thereby improving the consistency of the brightness and chromaticity display of each light-emitting chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0016] Figure 1 A flowchart of a display compensation method provided in an embodiment of the present application.

[0017] Figure 2 A schematic diagram of the structure of a brightness and chromaticity compensation table provided in an embodiment of the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0020] In view of the technical problem that there are still differences in brightness and chromaticity display between different types of light-emitting chips after classification and screening mentioned above, this embodiment provides a display compensation method for a display panel, please refer to Figure 1 to Figure 2 The display panel includes a plurality of light-emitting chips for directly displaying a picture, and the display compensation method includes the following steps:

[0021] Step S10: dividing a plurality of light-emitting chips into different light-emitting chip groups according to parameters of each light-emitting chip in the display panel.

[0022] Step S20: determining brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target values.

[0023] Step S30: compensating the brightness and chromaticity of the corresponding light-emitting chip group based on the brightness and chromaticity compensation table.

[0024] It can be understood that the display compensation method provided in the present embodiment first divides a plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel, then determines the brightness and chromaticity compensation table corresponding to the different light-emitting chip groups according to the brightness and chromaticity target value, and then compensates the brightness and chromaticity of the corresponding light-emitting chip groups based on the brightness and chromaticity compensation table to control the different light-emitting chip groups to have the same brightness and chromaticity target value. The brightness and chromaticity compensation table can be used to perform brightness and chromaticity compensation on light-emitting chip groups with different parameters, thereby improving the consistency of the brightness and chromaticity display of each light-emitting chip.

[0025] It should be noted that the display panel directly displays images using a light-emitting chip, rather than providing backlight through a light-emitting chip. The light-emitting chip may be a mini light-emitting diode (Mini-LED) chip or a micro light-emitting diode (Micro-LED) chip.

[0026] These brightness and chromaticity compensation tables may be stored in registers in the display panel. After power-on, brightness and chromaticity compensation may be achieved by calling corresponding brightness and chromaticity compensation tables from the registers.

[0027] In one embodiment, the step of dividing a plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel includes: obtaining the parameters of each light-emitting chip in the display panel; and dividing the plurality of light-emitting chips into different light-emitting chip groups according to the range to which the parameters of each light-emitting chip belong.

[0028] It should be noted that the parameters of each light-emitting chip in the display panel can be obtained through corresponding instruments or devices, or can be obtained by calculation.

[0029] The same parameter of the light-emitting chip can be understood as having different sizes, and the corresponding range can be divided according to the size of the parameter, and the light-emitting chips of each parameter in the same range are a light-emitting chip group.

[0030] In one embodiment, the step of dividing multiple light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel includes: obtaining the parameters of each light-emitting chip in the display panel, the parameter being the wavelength; and dividing the multiple light-emitting chips into different light-emitting chip groups according to the wavelength range of each light-emitting chip.

[0031] It should be noted that the present embodiment classifies the light emitting chips by wavelength, and different wavelengths have different brightness and display colors. Therefore, classifying the light emitting chips by wavelength and performing brightness and chromaticity compensation based on this can effectively improve the consistency of brightness and chromaticity.

[0032] The wavelength can be obtained by a colorimeter or by a fitting formula of color point data and wavelength data measured by a color analyzer (CA410).

[0033] In one embodiment, the step of dividing multiple light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel includes: obtaining the parameters of each light-emitting chip in the display panel, the parameters are color coordinates; and dividing the multiple light-emitting chips into different light-emitting chip groups according to the color coordinate range of each light-emitting chip.

[0034] It should be noted that the present embodiment classifies the light emitting chips by color coordinates. Different color coordinates have different brightness and display colors. Therefore, classifying the light emitting chips by color coordinates and performing brightness and chromaticity compensation based on them can also effectively improve the consistency of brightness and chromaticity.

[0035] In one embodiment, the step of determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target value includes: obtaining the brightness and chromaticity target value; and obtaining the brightness and chromaticity compensation table corresponding to each light-emitting chip group according to the same brightness and chromaticity target value.

[0036] It should be noted that each compensation value in the brightness and chromaticity compensation table may be a difference between a brightness and chromaticity target value and an actual brightness and chromaticity of each light-emitting chip.

[0037] In one embodiment, the step of obtaining the brightness and chromaticity target values ​​includes: obtaining the minimum brightness value of each light-emitting chip in different light-emitting chip groups as the brightness target value; obtaining the minimum chromaticity value of each light-emitting chip in different light-emitting chip groups as the chromaticity target value; determining the brightness target value and the chromaticity target value as the brightness and chromaticity target value.

[0038] It needs to be explained that if Figure 2 As shown, the different light emitting chip groups may be, for example, at least two of the light emitting chip group A, the light emitting chip group B, and the light emitting chip group C. It is understandable that the more light emitting chip groups there are, the more detailed the classification of the light emitting chips is, and correspondingly, the more accurate the compensation effect that can be obtained by each light emitting chip group is.

[0039] The difference between the brightness target value and the actual brightness of each light-emitting chip is the brightness correction data, and the difference between the chromaticity target value and the actual chromaticity of each light-emitting chip is the chromaticity correction data.

[0040] In one embodiment, the step of compensating the brightness and chromaticity of the corresponding light-emitting chips group based on the brightness and chromaticity compensation table to control different light-emitting chips groups to have the same brightness and chromaticity target value includes: matching the mapping relationship between the brightness and chromaticity compensation table and the light-emitting chips group according to the brightness and chromaticity target value; and determining the brightness and chromaticity compensation table used by the light-emitting chips group based on the mapping relationship.

[0041] It should be noted that this embodiment can ensure that the light-emitting chipset calls a suitable brightness and chromaticity compensation table, and avoids calling an unsuitable brightness and chromaticity compensation table, which may lead to deterioration of the compensation effect.

[0042] In one embodiment, the step of determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target values ​​includes: determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups under a binding point grayscale according to the brightness and chromaticity target values; and obtaining the corresponding brightness and chromaticity compensation tables under other grayscales based on the brightness and chromaticity compensation table under the binding point grayscale.

[0043] It should be noted that the other grayscales are grayscales other than the binding point grayscale, wherein the binding point grayscale may be 128 grayscales, or other different grayscales, such as one of grayscales 0 to 127, or one of grayscales 129 to 255.

[0044] Multiple sets of LUTs can also improve the compensation effect between different grayscales, but at this time there is no need to perform multi-grayscale correction. You only need to modify the LUT data to obtain the corresponding compensation data.

[0045] For example: select 128 grayscale as the binding point, and there is a certain linear or nonlinear relationship between the compensation data after the LUT and the brightness and chromaticity equalization method, the brightness equalization method or the chromaticity equalization method. Then, for the remaining grayscales, this relationship expression can also be applied to obtain the actual compensation data of the remaining grayscales, thereby avoiding the linear increase in time caused by the correction of multiple grayscales.

[0046] In one embodiment, the step of determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target values ​​also includes: setting the same light-emitting chip group to include a light-emitting chip that displays red, a light-emitting chip that displays green, and a light-emitting chip that displays blue; and determining, according to the brightness and chromaticity target values, that light-emitting chips of different colors in the same light-emitting chip group use different brightness and chromaticity compensation tables.

[0047] It needs to be explained that Figure 2 The brightness and chromaticity compensation table shown is used for the red (R) light emitting chip as an example. In this embodiment, since different brightness and chromaticity compensation tables are used for light emitting chips of different colors in the same light emitting chip group according to the brightness and chromaticity target value, differentiated brightness and chromaticity compensation can be performed for light emitting chips of different colors, which can further improve the brightness and chromaticity compensation effect.

[0048] It should be noted that the above implementation scheme does not require recalculation after acquiring the image. It is intended to preliminarily reduce the brightness and chromaticity differences between light points based on the pre-corrected brightness and chromaticity compensation table (LUT). Subsequently, a brightness and chromaticity equalization method, a brightness equalization method, or a chromaticity equalization method can be performed on this basis (in this case, calculations need to be performed based on the image acquired by the camera).

[0049] In one embodiment, after the step of compensating the brightness and chromaticity of the corresponding light-emitting chip group based on the brightness and chromaticity compensation table, the step further includes: compensating each light-emitting chip by a brightness and chromaticity uniformity method.

[0050] It should be noted that the present embodiment is intended to illustrate that the display compensation method adopted before the brightness and chromaticity equalization method is used for compensation belongs to pre-compensation or the first brightness and chromaticity compensation. Compared with the brightness and chromaticity equalization method in the traditional sense, the display compensation method adopted before the brightness and chromaticity equalization method is used for compensation requires less calculation amount. Therefore, a better brightness and chromaticity compensation effect can be achieved with less calculation amount.

[0051] In one embodiment, the present embodiment provides a display panel, which executes the display compensation method in at least one of the above embodiments.

[0052] It can be understood that since the display panel provided in this embodiment implements the display compensation method in at least one of the above-mentioned embodiments, it can also divide the multiple light-emitting chips into different light-emitting chip groups according to the parameters of each light-emitting chip in the display panel, and then determine the brightness and chromaticity compensation table corresponding to the different light-emitting chip groups according to the brightness and chromaticity target value, and then compensate the brightness and chromaticity of the corresponding light-emitting chip groups based on the brightness and chromaticity compensation table to control the different light-emitting chip groups to have the same brightness and chromaticity target value. The brightness and chromaticity compensation table can be used to perform brightness and chromaticity compensation on light-emitting chip groups with different parameters, thereby improving the consistency of the brightness and chromaticity display of each light-emitting chip.

[0053] It should be noted that the above-mentioned display panel can be a mini light emitting diode (Mini-LED) display screen or a micro light emitting diode (Micro-LED) display screen.

[0054] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0055] The display panel and display compensation method thereof provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display compensation method for a display panel, characterized in that: The display panel includes a plurality of light-emitting chips for directly displaying a picture, and the display compensation method includes: Dividing the plurality of light-emitting chips into different light-emitting chip groups according to parameters of each of the light-emitting chips in the display panel; Determine a brightness and chromaticity compensation table corresponding to different light-emitting chip groups according to the brightness and chromaticity target value; The brightness and chromaticity of the corresponding light-emitting chipset group are compensated based on the brightness and chromaticity compensation table.

2. The display compensation method according to claim 1, characterized in that: The step of dividing the plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each of the light-emitting chips in the display panel comprises: Acquiring the parameters of each of the light-emitting chips in the display panel; According to the range of the parameters of each of the light-emitting chips, the plurality of light-emitting chips are divided into different light-emitting chip groups.

3. The display compensation method according to claim 1, characterized in that: The step of dividing the plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each of the light-emitting chips in the display panel comprises: Acquire the parameter of each of the light-emitting chips in the display panel, wherein the parameter is wavelength; According to the wavelength range of each of the light-emitting chips, the plurality of light-emitting chips are divided into different light-emitting chip groups.

4. The display compensation method according to claim 1, characterized in that: The step of dividing the plurality of light-emitting chips into different light-emitting chip groups according to the parameters of each of the light-emitting chips in the display panel comprises: Acquire the parameter of each of the light-emitting chips in the display panel, wherein the parameter is a color coordinate; According to the color coordinate range of each of the light-emitting chips, the plurality of light-emitting chips are divided into different light-emitting chip groups.

5. The display compensation method according to claim 1, characterized in that: The step of determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target values ​​comprises: Obtaining the brightness and chromaticity target value; A brightness and chromaticity compensation table corresponding to each light-emitting chip group is obtained according to the same brightness and chromaticity target value.

6. The display compensation method according to claim 5, characterized in that: The step of obtaining the brightness and chromaticity target value comprises: Acquire the minimum brightness value of each light-emitting chip in different light-emitting chip groups as a brightness target value; Acquire the minimum chromaticity value of each light-emitting chip in the different light-emitting chip groups as the chromaticity target value; The brightness target value and the chromaticity target value are determined to be the brightness and chromaticity target values.

7. The display compensation method according to claim 1, characterized in that: The step of determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target values ​​comprises: Determine a brightness and chromaticity compensation table corresponding to different light-emitting chip groups at a binding point grayscale according to the brightness and chromaticity target value; Based on the brightness and chromaticity compensation table at the binding point grayscale, the brightness and chromaticity compensation tables corresponding to other grayscales are obtained.

8. The display compensation method according to any one of claims 1 to 7, characterized in that: The step of determining the brightness and chromaticity compensation tables corresponding to different light-emitting chip groups according to the brightness and chromaticity target values ​​also includes: The same light-emitting chip group is provided to include a light-emitting chip that displays red, a light-emitting chip that displays green, and a light-emitting chip that displays blue; According to the brightness and chromaticity target values, different brightness and chromaticity compensation tables are used for the light-emitting chips of different colors in the same light-emitting chip group.

9. The display compensation method according to any one of claims 1 to 7, characterized in that: After the step of compensating the brightness and chromaticity of the corresponding light-emitting chipset based on the brightness and chromaticity compensation table, the method further includes: Each of the light-emitting chips is compensated by a brightness and chromaticity uniformity method.

10. A display panel, characterized in that: The display panel executes the display compensation method as described in any one of claims 1-9.

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