CN115171605A - Picture compensation method and device and display equipment - Google Patents
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Abstract
Description
技术领域technical field
本发明涉及显示技术领域，特别是指一种画面补偿方法、装置及显示设备。The present invention relates to the field of display technology, and in particular, to a picture compensation method, device and display device.
背景技术Background technique
现有OLED(有机电致发光二极管)面板在超低亮度下(0.02nit左右)，画质显示普遍较差，如图1所示，可以看出，画面均一性较差。即使对画面进行补偿后，如图2所示，画面均一性仍未得到明显改善。Under the ultra-low brightness (about 0.02 nit) of the existing OLED (organic electroluminescent diode) panel, the picture quality is generally poor. As shown in FIG. 1 , it can be seen that the picture uniformity is poor. Even after the picture is compensated, as shown in Figure 2, the picture uniformity is not significantly improved.
发明内容SUMMARY OF THE INVENTION
本发明要解决的技术问题是提供一种画面补偿方法、装置及显示设备，能够改善显示设备在低亮度下的画面质量。The technical problem to be solved by the present invention is to provide a picture compensation method, device and display device, which can improve the picture quality of the display device under low brightness.
为解决上述技术问题，本发明的实施例提供技术方案如下：In order to solve the above-mentioned technical problems, the embodiments of the present invention provide the following technical solutions:
一方面，提供一种画面补偿方法，包括：In one aspect, a picture compensation method is provided, including:
获得显示屏的亮度大于第一预设亮度时的第一补偿公式，所述第一补偿公式为像素的目标灰阶值与实际灰阶值之间的关系式；obtaining a first compensation formula when the brightness of the display screen is greater than the first preset brightness, where the first compensation formula is a relationship between the target grayscale value of the pixel and the actual grayscale value;
获得显示屏的亮度小于第二预设亮度时的第二补偿公式，所述第二补偿公式为像素的目标灰阶值与实际灰阶值之间的关系式，所述第二预设亮度小于或等于所述第一预设亮度；Obtain a second compensation formula when the brightness of the display screen is less than the second preset brightness, the second compensation formula is the relationship between the target grayscale value of the pixel and the actual grayscale value, and the second preset brightness is less than or equal to the first preset brightness;
根据所述第一补偿公式和所述第二补偿公式得到第三补偿公式，所述第三补偿公式为显示屏在任意亮度下像素的目标灰阶值与实际灰阶值之间的关系式；A third compensation formula is obtained according to the first compensation formula and the second compensation formula, and the third compensation formula is a relationship between the target grayscale value and the actual grayscale value of a pixel of the display screen at any brightness;
将像素的目标灰阶值输入所述第三补偿公式，计算得到对应的实际灰阶值，根据所述实际灰阶值控制像素进行显示。Inputting the target grayscale value of the pixel into the third compensation formula, calculating the corresponding actual grayscale value, and controlling the pixel to display according to the actual grayscale value.
一些实施例中，所述获得显示屏的亮度大于第一预设亮度时的第一补偿公式包括：In some embodiments, the first compensation formula obtained when the brightness of the display screen is greater than the first preset brightness includes:
控制所述显示屏显示纯白画面，且所述显示屏的亮度大于第一预设亮度；Controlling the display screen to display a pure white picture, and the brightness of the display screen is greater than the first preset brightness;
向所述显示屏的测试像素输入测试灰阶值，对所述显示屏进行拍照，根据拍照的图像获得所述测试像素的实际灰阶值，得到一组第一测试数据，所述第一测试数据包括测试像素的所述测试灰阶值和对应的实际灰阶值；Input the test grayscale value to the test pixel of the display screen, take a picture of the display screen, obtain the actual grayscale value of the test pixel according to the photographed image, and obtain a set of first test data, the first test The data includes the test grayscale value and the corresponding actual grayscale value of the test pixel;
利用至少三组不同的第一测试数据得到所述第一补偿公式：The first compensation formula is obtained by using at least three sets of different first test data:
Y＝a*X2+b*X+c；Y=a*X 2 +b*X+c;
其中，Y为目标灰阶值，X为实际灰阶值，a、b、c为补偿系数。Among them, Y is the target grayscale value, X is the actual grayscale value, and a, b, and c are the compensation coefficients.
一些实施例中，所述获得显示屏的亮度小于第二预设亮度时的第二补偿公式包括：In some embodiments, the second compensation formula obtained when the brightness of the display screen is less than the second preset brightness includes:
控制所述显示屏显示纯白画面，且所述显示屏的亮度小于第二预设亮度；Controlling the display screen to display a pure white picture, and the brightness of the display screen is less than the second preset brightness;
向所述显示屏的测试像素输入测试灰阶值，对所述显示屏进行拍照，根据拍照的图像获得所述测试像素的实际灰阶值，得到一组第二测试数据，所述第二测试数据包括测试像素的所述测试灰阶值和对应的实际灰阶值；Input the test grayscale value to the test pixel of the display screen, take a picture of the display screen, obtain the actual grayscale value of the test pixel according to the photographed image, and obtain a set of second test data, the second test The data includes the test grayscale value and the corresponding actual grayscale value of the test pixel;
利用所述第二测试数据得到所述第二补偿公式：The second compensation formula is obtained by using the second test data:
Y＝X+O；Y=X+O;
其中，Y为目标灰阶值，X为实际灰阶值，O为补偿系数。Among them, Y is the target grayscale value, X is the actual grayscale value, and O is the compensation coefficient.
一些实施例中，所述第三补偿公式为：In some embodiments, the third compensation formula is:
Y＝a*X2+b*X+c+k*O；Y=a*X 2 +b*X+c+k*O;
其中，k为调节系数，k的取值与显示屏的亮度成反比，在所述显示屏的亮度大于第一预设亮度时，k＝0，在所述显示屏的亮度小于第二预设亮度时，k＝1。Wherein, k is an adjustment coefficient, and the value of k is inversely proportional to the brightness of the display screen. When the brightness of the display screen is greater than the first preset brightness, k=0, and when the brightness of the display screen is less than the second preset brightness At brightness, k=1.
一些实施例中，第二预设亮度为0.02nit。In some embodiments, the second preset brightness is 0.02nit.
本发明的实施例还提供了一种画面补偿装置，包括：An embodiment of the present invention also provides a picture compensation device, including:
第一处理模块，用于获得显示屏的亮度大于第一预设亮度时的第一补偿公式，所述第一补偿公式为像素的目标灰阶值与实际灰阶值之间的关系式；a first processing module, configured to obtain a first compensation formula when the brightness of the display screen is greater than the first preset brightness, where the first compensation formula is a relationship between a target grayscale value of a pixel and an actual grayscale value;
第二处理模块，用于获得显示屏的亮度小于第二预设亮度时的第二补偿公式，所述第二补偿公式为像素的目标灰阶值与实际灰阶值之间的关系式，所述第二预设亮度小于或等于所述第一预设亮度；The second processing module is configured to obtain a second compensation formula when the brightness of the display screen is less than the second preset brightness, where the second compensation formula is the relationship between the target grayscale value of the pixel and the actual grayscale value, so the second preset brightness is less than or equal to the first preset brightness;
第三处理模块，用于根据所述第一补偿公式和所述第二补偿公式得到第三补偿公式，所述第三补偿公式为显示屏在任意亮度下像素的目标灰阶值与实际灰阶值之间的关系式；A third processing module, configured to obtain a third compensation formula according to the first compensation formula and the second compensation formula, where the third compensation formula is the target grayscale value and the actual grayscale value of a pixel of the display screen at any brightness relationship between values;
补偿模块，用于将像素的目标灰阶值输入所述第三补偿公式，计算得到对应的实际灰阶值，根据所述实际灰阶值控制像素进行显示。The compensation module is configured to input the target grayscale value of the pixel into the third compensation formula, calculate the corresponding actual grayscale value, and control the pixel to display according to the actual grayscale value.
一些实施例中，所述第一处理模块包括：In some embodiments, the first processing module includes:
第一控制单元，用于控制所述显示屏显示纯白画面，且所述显示屏的亮度大于第一预设亮度；a first control unit, configured to control the display screen to display a pure white picture, and the brightness of the display screen is greater than a first preset brightness;
第一测试单元，用于向所述显示屏的测试像素输入测试灰阶值，对所述显示屏进行拍照，根据拍照的图像获得所述测试像素的实际灰阶值，得到一组第一测试数据，所述第一测试数据包括测试像素的所述测试灰阶值和对应的实际灰阶值；The first test unit is used to input test grayscale values to the test pixels of the display screen, take pictures of the display screen, obtain the actual grayscale values of the test pixels according to the photographed images, and obtain a set of first test data, the first test data includes the test grayscale value of the test pixel and the corresponding actual grayscale value;
第一处理单元，用于利用至少三组不同的第一测试数据得到所述第一补偿公式：A first processing unit, configured to obtain the first compensation formula by using at least three sets of different first test data:
Y＝a*X2+b*X+c；Y=a*X 2 +b*X+c;
其中，Y为目标灰阶值，X为实际灰阶值，a、b、c为补偿系数。Among them, Y is the target grayscale value, X is the actual grayscale value, and a, b, and c are the compensation coefficients.
一些实施例中，所述第二处理模块包括：In some embodiments, the second processing module includes:
第二控制单元，用于控制所述显示屏显示纯白画面，且所述显示屏的亮度小于第二预设亮度；a second control unit, configured to control the display screen to display a pure white picture, and the brightness of the display screen is less than the second preset brightness;
第二测试单元，用于向所述显示屏的测试像素输入测试灰阶值，对所述显示屏进行拍照，根据拍照的图像获得所述测试像素的实际灰阶值，得到一组第二测试数据，所述第二测试数据包括测试像素的所述测试灰阶值和对应的实际灰阶值；The second test unit is configured to input test grayscale values to the test pixels of the display screen, take pictures of the display screen, obtain the actual grayscale values of the test pixels according to the photographed images, and obtain a set of second tests data, the second test data includes the test grayscale value of the test pixel and the corresponding actual grayscale value;
第二处理单元，用于利用所述第二测试数据得到所述第二补偿公式：A second processing unit, configured to obtain the second compensation formula by using the second test data:
Y＝X+O；Y=X+O;
其中，Y为目标灰阶值，X为实际灰阶值，O为补偿系数。Among them, Y is the target grayscale value, X is the actual grayscale value, and O is the compensation coefficient.
一些实施例中，所述第三补偿公式为：In some embodiments, the third compensation formula is:
Y＝a*X2+b*X+c+k*O；Y=a*X 2 +b*X+c+k*O;
其中，k为调节系数，k的取值与显示屏的亮度成反比，在所述显示屏的亮度大于第一预设亮度时，k＝0，在所述显示屏的亮度小于第二预设亮度时，k＝1。Wherein, k is an adjustment coefficient, and the value of k is inversely proportional to the brightness of the display screen. When the brightness of the display screen is greater than the first preset brightness, k=0, and when the brightness of the display screen is less than the second preset brightness At brightness, k=1.
本发明的实施例还提供了一种显示设备，包括如上所述的画面补偿装置。An embodiment of the present invention also provides a display device, including the above-mentioned picture compensation apparatus.
本发明的实施例具有以下有益效果：Embodiments of the present invention have the following beneficial effects:
上述方案中，获得显示屏的亮度大于第一预设亮度时的第一补偿公式，以及显示屏的亮度小于第二预设亮度时的第二补偿公式，整合第一补偿公式和第二补偿公式得到第三补偿公式，可以根据第三补偿公式得到实际灰阶值，利用实际灰阶值控制显示屏进行显示，既可以补偿高亮度画质又可以兼顾低亮度画质，可以明显改善显示设备在低亮度下的画面质量。In the above solution, the first compensation formula when the brightness of the display screen is greater than the first preset brightness, and the second compensation formula when the brightness of the display screen is less than the second preset brightness is obtained, and the first compensation formula and the second compensation formula are integrated. The third compensation formula is obtained, the actual grayscale value can be obtained according to the third compensation formula, and the actual grayscale value is used to control the display screen for display, which can compensate for both high-brightness image quality and low-brightness image quality, which can significantly improve the display device's performance. Picture quality at low brightness.
附图说明Description of drawings
图1为超低亮度下的画面示意图；Fig. 1 is the picture schematic diagram under ultra-low brightness;
图2为现有技术对超低亮度画面进行补偿后的示意图；2 is a schematic diagram of the prior art after compensating an ultra-low brightness picture;
图3为本发明实施例画面补偿方法的流程示意图；3 is a schematic flowchart of a picture compensation method according to an embodiment of the present invention;
图4为本发明实施例对超低亮度画面进行补偿后的示意图；4 is a schematic diagram of an embodiment of the present invention after compensating an ultra-low brightness picture;
图5为本发明实施例画面补偿装置的结构示意图。FIG. 5 is a schematic structural diagram of a picture compensation apparatus according to an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明的实施例要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given in conjunction with the accompanying drawings and specific embodiments.
超低亮度下画质差的主要原因有两个：1.低亮度下显示面板的Loading和信号传导的延迟与高亮度下面板的Loading和信号传导的延迟完全不一样；2.现有的demura补偿技术是基于高亮度的mura特性去补偿的，这会导致算法与低亮度下mura特性不匹配，补偿效果较差。There are two main reasons for the poor picture quality at ultra-low brightness: 1. The delay of loading and signal conduction of the display panel under low brightness is completely different from that of the panel under high brightness; 2. The existing demura The compensation technology is based on the mura characteristics of high brightness to compensate, which will cause the algorithm to not match the mura characteristics of low brightness, and the compensation effect is poor.
本发明实施例提供一种画面补偿方法、装置及显示设备，能够改善显示设备在低亮度下的画面质量。Embodiments of the present invention provide a picture compensation method, device, and display device, which can improve the picture quality of the display device under low brightness.
本发明的实施例提供一种画面补偿方法，如图3所示，包括：An embodiment of the present invention provides a picture compensation method, as shown in FIG. 3 , including:
步骤101：获得显示屏的亮度大于第一预设亮度时的第一补偿公式，所述第一补偿公式为像素的目标灰阶值与实际灰阶值之间的关系式；Step 101: Obtain a first compensation formula when the brightness of the display screen is greater than a first preset brightness, where the first compensation formula is a relationship between a target grayscale value of a pixel and an actual grayscale value;
步骤102：获得显示屏的亮度小于第二预设亮度时的第二补偿公式，所述第二补偿公式为像素的目标灰阶值与实际灰阶值之间的关系式，所述第二预设亮度小于或等于所述第一预设亮度；Step 102: Obtain a second compensation formula when the brightness of the display screen is less than the second preset brightness, the second compensation formula is a relationship between the target grayscale value of the pixel and the actual grayscale value, the second preset Set the brightness to be less than or equal to the first preset brightness;
步骤103：根据所述第一补偿公式和所述第二补偿公式得到第三补偿公式，所述第三补偿公式为显示屏在任意亮度下像素的目标灰阶值与实际灰阶值之间的关系式；Step 103: Obtain a third compensation formula according to the first compensation formula and the second compensation formula, where the third compensation formula is the difference between the target grayscale value and the actual grayscale value of a pixel of the display screen at any brightness. relational;
步骤104：将像素的目标灰阶值输入所述第三补偿公式，计算得到对应的实际灰阶值，根据所述实际灰阶值控制像素进行显示。Step 104: Input the target grayscale value of the pixel into the third compensation formula, calculate the corresponding actual grayscale value, and control the pixel to display according to the actual grayscale value.
本实施例中，获得显示屏的亮度大于第一预设亮度时的第一补偿公式，以及显示屏的亮度小于第二预设亮度时的第二补偿公式，整合第一补偿公式和第二补偿公式得到第三补偿公式，可以根据第三补偿公式得到实际灰阶值，利用实际灰阶值控制显示屏进行显示，既可以补偿高亮度画质又可以兼顾低亮度画质，可以明显改善显示设备在低亮度下的画面质量。In this embodiment, a first compensation formula is obtained when the brightness of the display screen is greater than the first preset brightness, and a second compensation formula is obtained when the brightness of the display screen is less than the second preset brightness, and the first compensation formula and the second compensation formula are integrated The third compensation formula can be obtained from the formula, and the actual grayscale value can be obtained according to the third compensation formula, and the actual grayscale value can be used to control the display screen for display, which can compensate for both high-brightness image quality and low-brightness image quality, which can significantly improve the display device. Picture quality at low brightness.
一些实施例中，所述获得显示屏的亮度大于第一预设亮度时的第一补偿公式包括：In some embodiments, the first compensation formula obtained when the brightness of the display screen is greater than the first preset brightness includes:
控制所述显示屏显示纯白画面，且所述显示屏的亮度大于第一预设亮度，第一预设亮度的取值可以根据需要进行设定，比如可以为10nit以上；Controlling the display screen to display a pure white picture, and the brightness of the display screen is greater than the first preset brightness, and the value of the first preset brightness can be set as required, for example, it can be more than 10nit;
向所述显示屏的测试像素输入测试灰阶值，对所述显示屏进行拍照，根据拍照的图像获得所述测试像素的实际灰阶值，得到一组第一测试数据，所述第一测试数据包括测试像素的所述测试灰阶值和对应的实际灰阶值，对显示屏进行拍照可以获得测试像素的实际亮度，根据测试像素的实际亮度可以得到测试像素的实际灰阶值；Input the test grayscale value to the test pixel of the display screen, take a picture of the display screen, obtain the actual grayscale value of the test pixel according to the photographed image, and obtain a set of first test data, the first test The data includes the test grayscale value of the test pixel and the corresponding actual grayscale value, the actual brightness of the test pixel can be obtained by taking a picture of the display screen, and the actual grayscale value of the test pixel can be obtained according to the actual brightness of the test pixel;
利用至少三组不同的第一测试数据得到所述第一补偿公式：The first compensation formula is obtained by using at least three sets of different first test data:
Y＝a*X2+b*X+c；Y=a*X 2 +b*X+c;
其中，Y为目标灰阶值，X为实际灰阶值，a、b、c为补偿系数。Among them, Y is the target grayscale value, X is the actual grayscale value, and a, b, and c are the compensation coefficients.
一些实施例中，所述获得显示屏的亮度小于第二预设亮度时的第二补偿公式包括：In some embodiments, the second compensation formula obtained when the brightness of the display screen is less than the second preset brightness includes:
控制所述显示屏显示纯白画面，且所述显示屏的亮度小于第二预设亮度，第二预设亮度的取值可以根据需要进行设定，比如可以为10nit以下，具体可以为0.02nit；Control the display screen to display a pure white picture, and the brightness of the display screen is less than the second preset brightness, the value of the second preset brightness can be set as required, for example, it can be less than 10nit, specifically 0.02nit ;
向所述显示屏的测试像素输入测试灰阶值，对所述显示屏进行拍照，根据拍照的图像获得所述测试像素的实际灰阶值，得到一组第二测试数据，所述第二测试数据包括测试像素的所述测试灰阶值和对应的实际灰阶值，具体地，使用可以拍摄超低亮度画面的工业相机对显示屏进行拍照，提取显示屏在超低亮度下的mura形貌，对显示屏进行拍照可以获得测试像素的实际亮度，根据测试像素的实际亮度可以得到测试像素的实际灰阶值；Input the test grayscale value to the test pixel of the display screen, take a picture of the display screen, obtain the actual grayscale value of the test pixel according to the photographed image, and obtain a set of second test data, the second test The data includes the test grayscale value of the test pixel and the corresponding actual grayscale value. Specifically, use an industrial camera that can shoot ultra-low brightness pictures to take pictures of the display screen, and extract the mura shape of the display screen under ultra-low brightness. , the actual brightness of the test pixel can be obtained by taking a picture of the display screen, and the actual grayscale value of the test pixel can be obtained according to the actual brightness of the test pixel;
利用所述第二测试数据得到所述第二补偿公式：The second compensation formula is obtained by using the second test data:
Y＝X+O；Y=X+O;
其中，Y为目标灰阶值，X为实际灰阶值，O为补偿系数。Among them, Y is the target grayscale value, X is the actual grayscale value, and O is the compensation coefficient.
本实施例中可以利用一组第二测试数据得到第二补偿公式，也可以利用多组第二测试数据拟合得到第二补偿公式。In this embodiment, the second compensation formula may be obtained by using a set of second test data, or the second compensation formula may be obtained by fitting multiple sets of second test data.
一些实施例中，所述第三补偿公式为：In some embodiments, the third compensation formula is:
Y＝a*X2+b*X+c+k*O；Y=a*X 2 +b*X+c+k*O;
其中，k为调节系数，k的取值与显示屏的亮度成反比，在所述显示屏的亮度大于第一预设亮度时，k＝0，在所述显示屏的亮度小于第二预设亮度时，k＝1。这样在显示屏处于高亮状态时，k＝0，利用第三补偿公式可以对高亮状态下的显示屏进行补偿；在显示屏处于低亮状态时，k＝1，利用第三补偿公式可以对低亮状态下的显示屏进行补偿；在显示屏处于其他状态时，通过调整k的取值来对不同状态下的显示屏进行补偿。不同亮度对应的k值可以以LUT(Look-Up-Table，查找表)的形式存放在IC(驱动电路)的寄存器中。Wherein, k is an adjustment coefficient, and the value of k is inversely proportional to the brightness of the display screen. When the brightness of the display screen is greater than the first preset brightness, k=0, and when the brightness of the display screen is less than the second preset brightness At brightness, k=1. In this way, when the display screen is in a high-brightness state, k=0, and the third compensation formula can be used to compensate the display screen in a high-brightness state; when the display screen is in a low-brightness state, k=1, and the third compensation formula can be used to compensate Compensate the display screen in low light state; when the display screen is in other states, adjust the value of k to compensate the display screen in different states. The k values corresponding to different luminances can be stored in a register of an IC (driving circuit) in the form of a LUT (Look-Up-Table, look-up table).
在得到补偿系数和k值后，可以利用补偿系数和k值生成一个整体的十六进制文件，存储在IC中，在显示屏进行显示时，获取显示屏的亮度，根据显示屏的亮度确定对应的k值，进而确定对应的第三补偿公式，根据第三补偿公式对画质进行补偿，通过本实施例的技术方案，能够改善显示设备在低亮度下的画面质量，图4为本发明实施例对超低亮度画面进行补偿后的示意图，可以看出，画面均一性得到明显改善。After the compensation coefficient and k value are obtained, an overall hexadecimal file can be generated by using the compensation coefficient and k value, and stored in the IC. When the display screen is displayed, the brightness of the display screen can be obtained and determined according to the brightness of the display screen. Corresponding k value, and then determine the corresponding third compensation formula, and compensate the image quality according to the third compensation formula. Through the technical solution of this embodiment, the image quality of the display device under low brightness can be improved, and FIG. 4 is the present invention. It can be seen from the schematic diagram after compensation of the ultra-low brightness picture in the embodiment that the picture uniformity is significantly improved.
可以使用色亮度均一性(△E)来评价显示屏的低亮度画质效果，如表1所示，一具体示例中，将显示屏划分为9*15个显示区域，表格中的数值为每个显示区域的色亮度均一性值，利用每个显示区域的亮度和色度坐标可以计算出该显示区域的色亮度均一性值，其中，显示屏中心区域的色亮度均一性值为0，其他显示区域的色亮度均一性值与0的差距越大，则画面的均一性越差，色亮度均一性值越小，表明显示屏低灰阶画质越好。表1为未经过画面补偿的低亮度显示画面的色亮度均一性值，可以看出，画面均一性较差。The color luminance uniformity (△E) can be used to evaluate the low-brightness image quality effect of the display screen, as shown in Table 1. In a specific example, the display screen is divided into 9*15 display areas, and the values in the table are each The color brightness uniformity value of each display area can be calculated by using the brightness and chromaticity coordinates of each display area. The color brightness uniformity value of the display area is 0, and the other The larger the gap between the color brightness uniformity value of the display area and 0, the worse the uniformity of the picture, and the smaller the color brightness uniformity value, indicating that the low grayscale image quality of the display screen is better. Table 1 shows the color and brightness uniformity values of the low-brightness display images without image compensation. It can be seen that the image uniformity is poor.
表1Table 1
表2为现有技术对超低亮度画面进行补偿后的色亮度均一性值，可以看出，画面均一性未得到明显改善。Table 2 shows the color and luminance uniformity values after compensation for ultra-low luminance pictures in the prior art. It can be seen that the picture uniformity is not significantly improved.
表2Table 2
表3为本发明实施例对超低亮度画面进行补偿后的色亮度均一性值，可以看出，画面均一性得到明显改善。Table 3 shows the color and luminance uniformity values after compensation for the ultra-low luminance picture in the embodiment of the present invention. It can be seen that the picture uniformity is significantly improved.
表3table 3
本发明的实施例还提供了一种画面补偿装置，如图5所示，包括：An embodiment of the present invention also provides a picture compensation device, as shown in FIG. 5 , including:
第一处理模块21，用于获得显示屏的亮度大于第一预设亮度时的第一补偿公式，所述第一补偿公式为像素的目标灰阶值与实际灰阶值之间的关系式；The
第二处理模块22，用于获得显示屏的亮度小于第二预设亮度时的第二补偿公式，所述第二补偿公式为像素的目标灰阶值与实际灰阶值之间的关系式，所述第二预设亮度小于或等于所述第一预设亮度；The
第三处理模块23，用于根据所述第一补偿公式和所述第二补偿公式得到第三补偿公式，所述第三补偿公式为显示屏在任意亮度下像素的目标灰阶值与实际灰阶值之间的关系式；The
补偿模块24，用于将像素的目标灰阶值输入所述第三补偿公式，计算得到对应的实际灰阶值，根据所述实际灰阶值控制像素进行显示。The
本实施例中，获得显示屏的亮度大于第一预设亮度时的第一补偿公式，以及显示屏的亮度小于第二预设亮度时的第二补偿公式，整合第一补偿公式和第二补偿公式得到第三补偿公式，可以根据第三补偿公式得到实际灰阶值，利用实际灰阶值控制显示屏进行显示，既可以补偿高亮度画质又可以兼顾低亮度画质，可以明显改善显示设备在低亮度下的画面质量。In this embodiment, a first compensation formula is obtained when the brightness of the display screen is greater than the first preset brightness, and a second compensation formula is obtained when the brightness of the display screen is less than the second preset brightness, and the first compensation formula and the second compensation formula are integrated The third compensation formula can be obtained from the formula, and the actual grayscale value can be obtained according to the third compensation formula, and the actual grayscale value can be used to control the display screen for display, which can compensate for both high-brightness image quality and low-brightness image quality, which can significantly improve the display device. Picture quality at low brightness.
一些实施例中，所述第一处理模块21包括：In some embodiments, the
第一控制单元，用于控制所述显示屏显示纯白画面，且所述显示屏的亮度大于第一预设亮度，第一预设亮度的取值可以根据需要进行设定，比如可以为10nit以上；The first control unit is used to control the display screen to display a pure white picture, and the brightness of the display screen is greater than the first preset brightness. The value of the first preset brightness can be set as required, for example, it can be 10nit above;
第一测试单元，用于向所述显示屏的测试像素输入测试灰阶值，对所述显示屏进行拍照，根据拍照的图像获得所述测试像素的实际灰阶值，得到一组第一测试数据，所述第一测试数据包括测试像素的所述测试灰阶值和对应的实际灰阶值，对显示屏进行拍照可以获得测试像素的实际亮度，根据测试像素的实际亮度可以得到测试像素的实际灰阶值；The first test unit is used to input test grayscale values to the test pixels of the display screen, take pictures of the display screen, obtain the actual grayscale values of the test pixels according to the photographed images, and obtain a set of first test Data, the first test data includes the test grayscale value of the test pixel and the corresponding actual grayscale value, the actual brightness of the test pixel can be obtained by taking a picture of the display screen, and the actual brightness of the test pixel can be obtained according to the actual brightness of the test pixel. actual grayscale value;
第一处理单元，用于利用至少三组不同的第一测试数据得到所述第一补偿公式：A first processing unit, configured to obtain the first compensation formula by using at least three sets of different first test data:
Y＝a*X2+b*X+c；Y=a*X 2 +b*X+c;
其中，Y为目标灰阶值，X为实际灰阶值，a、b、c为补偿系数。Among them, Y is the target grayscale value, X is the actual grayscale value, and a, b, and c are the compensation coefficients.
一些实施例中，所述第二处理模块22包括：In some embodiments, the
第二控制单元，用于控制所述显示屏显示纯白画面，且所述显示屏的亮度小于第二预设亮度，第二预设亮度的取值可以根据需要进行设定，比如可以为10nit以下，具体可以为0.02nit；The second control unit is used to control the display screen to display a pure white picture, and the brightness of the display screen is less than the second preset brightness. The value of the second preset brightness can be set as required, for example, it can be 10nit Below, the specific value can be 0.02nit;
第二测试单元，用于向所述显示屏的测试像素输入测试灰阶值，对所述显示屏进行拍照，根据拍照的图像获得所述测试像素的实际灰阶值，得到一组第二测试数据，所述第二测试数据包括测试像素的所述测试灰阶值和对应的实际灰阶值，具体地，使用可以拍摄超低亮度画面的工业相机对显示屏进行拍照，提取显示屏在超低亮度下的mura形貌，对显示屏进行拍照可以获得测试像素的实际亮度，根据测试像素的实际亮度可以得到测试像素的实际灰阶值；The second test unit is configured to input test grayscale values to the test pixels of the display screen, take pictures of the display screen, obtain the actual grayscale values of the test pixels according to the photographed images, and obtain a set of second tests Data, the second test data includes the test grayscale value of the test pixel and the corresponding actual grayscale value, specifically, use an industrial camera that can shoot ultra-low brightness pictures to take pictures of the display screen, The mura shape at low brightness can be obtained by taking a picture of the display screen to obtain the actual brightness of the test pixel, and the actual grayscale value of the test pixel can be obtained according to the actual brightness of the test pixel;
第二处理单元，用于利用所述第二测试数据得到所述第二补偿公式：A second processing unit, configured to obtain the second compensation formula by using the second test data:
Y＝X+O；Y=X+O;
其中，Y为目标灰阶值，X为实际灰阶值，O为补偿系数。Among them, Y is the target grayscale value, X is the actual grayscale value, and O is the compensation coefficient.
本实施例中可以利用一组第二测试数据得到第二补偿公式，也可以利用多组第二测试数据拟合得到第二补偿公式。In this embodiment, the second compensation formula may be obtained by using a set of second test data, or the second compensation formula may be obtained by fitting multiple sets of second test data.
一些实施例中，所述第三补偿公式为：In some embodiments, the third compensation formula is:
Y＝a*X2+b*X+c+k*O；Y=a*X 2 +b*X+c+k*O;
其中，k为调节系数，k的取值与显示屏的亮度成反比，在所述显示屏的亮度大于第一预设亮度时，k＝0，在所述显示屏的亮度小于第二预设亮度时，k＝1。这样在显示屏处于高亮状态时，k＝0，利用第三补偿公式可以对高亮状态下的显示屏进行补偿；在显示屏处于低亮状态时，k＝1，利用第三补偿公式可以对低亮状态下的显示屏进行补偿；在显示屏处于其他状态时，通过调整k的取值来对不同状态下的显示屏进行补偿。不同亮度对应的k值可以以LUT(Look-Up-Table，查找表)的形式存放在IC(驱动电路)的寄存器中。Wherein, k is an adjustment coefficient, and the value of k is inversely proportional to the brightness of the display screen. When the brightness of the display screen is greater than the first preset brightness, k=0, and when the brightness of the display screen is less than the second preset brightness In brightness, k=1. In this way, when the display screen is in a high-brightness state, k=0, and the third compensation formula can be used to compensate the display screen in a high-brightness state; when the display screen is in a low-brightness state, k=1, and the third compensation formula can be used to compensate Compensate the display screen in low light state; when the display screen is in other states, adjust the value of k to compensate the display screen in different states. The k values corresponding to different luminances can be stored in a register of an IC (driving circuit) in the form of a LUT (Look-Up-Table, look-up table).
在得到补偿系数和k值后，可以利用补偿系数和k值生成一个整体的十六进制文件，存储在IC中，在显示屏进行显示时，获取显示屏的亮度，根据显示屏的亮度确定对应的k值，进而确定对应的第三补偿公式，根据第三补偿公式对画质进行补偿，通过本实施例的技术方案，能够改善显示设备在低亮度下的画面质量，图4为本发明实施例对超低亮度画面进行补偿后的示意图，可以看出，画面均一性得到明显改善。After the compensation coefficient and k value are obtained, an overall hexadecimal file can be generated by using the compensation coefficient and k value, and stored in the IC. When the display screen is displayed, the brightness of the display screen can be obtained and determined according to the brightness of the display screen. Corresponding k value, and then determine the corresponding third compensation formula, and compensate the image quality according to the third compensation formula. Through the technical solution of this embodiment, the image quality of the display device under low brightness can be improved, and FIG. 4 is the present invention. It can be seen from the schematic diagram after compensation of the ultra-low brightness picture in the embodiment that the picture uniformity is significantly improved.
本发明的实施例还提供了一种显示设备，包括如上所述的画面补偿装置。An embodiment of the present invention also provides a display device, including the above-mentioned picture compensation apparatus.
该显示设备包括但不限于：射频单元、网络模块、音频输出单元、输入单元、传感器、显示单元、用户输入单元、接口单元、存储器、处理器、以及电源等部件。本领域技术人员可以理解，上述显示装置的结构并不构成对显示装置的限定，显示装置可以包括上述更多或更少的部件，或者组合某些部件，或者不同的部件布置。在本发明实施例中，显示装置包括但不限于显示器、手机、平板电脑、电视机、可穿戴电子设备、导航显示设备等。The display device includes but is not limited to: a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply and other components. Those skilled in the art can understand that the structure of the above-mentioned display device does not constitute a limitation on the display device, and the display device may include more or less components described above, or combine some components, or arrange different components. In this embodiment of the present invention, the display device includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.
所述显示设备可以为：电视、显示器、数码相框、手机、平板电脑等任何具有显示功能的产品或部件，其中，所述显示装置还包括柔性电路板、印刷电路板和背板。The display device can be any product or component with a display function, such as a TV, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device further includes a flexible circuit board, a printed circuit board and a backplane.
需要说明，本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于实施例而言，由于其基本相似于产品实施例，所以描述得比较简单，相关之处参见产品实施例的部分说明即可。It should be noted that each embodiment in this specification is described in a progressive manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments. Especially, for the embodiment, since it is basically similar to the product embodiment, the description is relatively simple, and the relevant part may refer to the partial description of the product embodiment.
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。Unless otherwise defined, technical or scientific terms used in this disclosure shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in this disclosure, "first," "second," and similar words do not denote any order, quantity, or importance, but are merely used to distinguish the various components. "Comprising" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to indicate the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element, Or intermediate elements may be present.
在上述实施方式的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the foregoing description of the embodiments, the particular features, structures, materials or characteristics may be combined in any suitable manner in any one or more of the embodiments or examples.
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited to this. should be included within the scope of protection of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
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