Display panel driving method, compensation relationship acquisition method and related devices

Abstract

The present application discloses a driving method for a display panel, a compensation relationship acquisition method, and related devices. The display panel includes a first display area and a second display area with different light transmittances; the method includes: obtaining reference grayscale values ​​corresponding to each sub-area in the second display area; the light-emitting sub-pixels in each sub-area are electrically connected to the corresponding first power signal lines; the power signal compensation values ​​corresponding to each sub-area are determined according to the power signal compensation relationship and the reference grayscale value; the power signal compensation values ​​are used to compensate for the brightness difference when the two display areas share the first Gamma parameter; the first Gamma parameter is obtained by performing Gamma correction on the first display area; the first power signal voltage of each first power signal line is adjusted according to the power signal compensation value of each sub-area. According to the embodiment of the present application, display uniformity can be guaranteed when two display areas with different light transmittances share the same Gamma parameter, thereby eliminating a Gamma correction process and improving production efficiency.

Description

Technical Field

[0001] The present application belongs to the technical field of display panels, and in particular relates to a display panel driving method, a compensation relationship acquisition method, and related devices. Background Art

[0002] With the continuous development of display panel technology, OLED (Organic Light-Emitting Diode) devices and other light-emitting devices have gradually been applied to various display panel products such as mobile phones, tablets, and notebooks.

[0003] In order to ensure that the display brightness changes of the display panel meet the needs of human eye perception, the display panel needs to be gamma-calibrated before leaving the factory to obtain the gamma register values ​​corresponding to the different binding point grayscales at each brightness level, so that the display panel can display light according to the gamma register value in accordance with the human eye's perception curve of brightness.

[0004] Display panels typically contain display areas that implement different functions. For example, the under-screen camera area, which houses the front-facing camera, has different sub-pixel arrangement and density, signal trace length and width, and pixel circuit layout design than conventional display areas. This results in different light transmittances in different display areas. Gamma correction for display areas with different light transmittances requires separate optical inspection using optical equipment, increasing the number of gamma corrections and the required correction time. This significantly impacts the display panel's tack time (TT) and reduces production efficiency. Summary of the Invention

[0005] The embodiments of the present application provide a display panel driving method, a compensation relationship acquisition method, and related devices, which can improve the technical problem that different display areas of the display panel need to be gamma corrected separately, affecting production efficiency.

[0006] In a first aspect, an embodiment of the present application provides a method for driving a display panel, wherein the display panel includes a first display area and a second display area having different light transmittances. The method includes:

[0007] Obtaining reference grayscale values ​​corresponding to each sub-area in the second display area; electrically connecting the light-emitting sub-pixels in each sub-area to the corresponding first power signal lines;

[0008] Determining power signal compensation values ​​corresponding to each sub-area based on a power signal compensation relationship and a reference grayscale value; the power signal compensation relationship is a correspondence between grayscale values ​​and power signal compensation values; the power signal compensation values ​​are used to compensate for brightness differences between light-emitting sub-pixels in the first display area and light-emitting sub-pixels in the second display area when they share a first gamma parameter; the first gamma parameter is obtained by performing gamma correction on the first display area;

[0009] The first power signal voltage of each first power signal line is adjusted respectively according to the power signal compensation value of each sub-area.

[0010] In some embodiments, in each sub-region, light-emitting sub-pixels of different light-emitting colors are electrically connected to different first power signal lines; and obtaining reference grayscale values ​​corresponding to each sub-region in the second display region includes:

[0011] Obtaining grayscale values ​​corresponding to the light-emitting sub-pixels in each sub-area of ​​the second display area;

[0012] Determining a reference grayscale value of a light-emitting sub-pixel of each light-emitting color in each sub-region according to the grayscale values ​​corresponding to the light-emitting sub-pixels of different light-emitting colors in each sub-region;

[0013] Determining power signal compensation values ​​corresponding to each sub-area according to the power signal compensation relationship and the reference grayscale value includes:

[0014] The power signal compensation values ​​corresponding to the light-emitting sub-pixels of each light-emitting color in each sub-region are determined according to the power signal compensation relationship and the reference grayscale values ​​of the light-emitting sub-pixels of each light-emitting color.

[0015] In some embodiments, adjusting the first power signal voltage of each first power signal line according to the power signal compensation value of each sub-region includes:

[0016] Determine a first compensated power signal for each sub-area based on a first reference power signal and a power signal compensation value for each sub-area; the first reference power signal is a first power signal voltage received by a light-emitting sub-pixel in the first display area;

[0017] The first compensation power signal corresponding to each sub-area is provided respectively through each first power signal line.

[0018] In some embodiments, in the second display area, each sub-area includes a light-emitting sub-pixel.

[0019] In a second aspect, an embodiment of the present application provides a compensation relationship acquisition method, the method comprising:

[0020] When the display panel displays images at various grayscales according to the first gamma parameter, first optical parameters and second optical parameters of the images are obtained; the first optical parameter is the luminous brightness corresponding to the first display area, and the second optical parameter is obtained by optical detection of the second display area; the first gamma parameter is obtained by gamma correction of the first display area;

[0021] adjusting the first power signal voltage of the second display area according to the first optical parameter and the second optical parameter so that the second optical parameter matches the first optical parameter in the image at each grayscale;

[0022] The power signal compensation values ​​corresponding to the respective gray levels are determined according to the first power signal voltages corresponding to the image frames at the respective gray levels and the first reference power signal, so as to generate a power signal compensation relationship.

[0023] In some embodiments, determining power signal compensation values ​​corresponding to respective grayscales based on first power signal voltages and first reference power signals corresponding to respective image frames at respective grayscales to generate power signal compensation relationships includes:

[0024] For a plurality of display panels, determining a power signal compensation value corresponding to each gray scale according to the first power signal voltage corresponding to the image screen of each display panel at each gray scale and the first reference power signal;

[0025] determining power signal compensation characteristic values ​​corresponding to respective grayscales according to power signal compensation values ​​corresponding to respective display panels;

[0026] A power signal compensation relationship is generated according to each gray scale and its corresponding power signal compensation characteristic value.

[0027] In some embodiments, adjusting the first power signal voltage of the second display area according to the first optical parameter and the second optical parameter so that the second optical parameter matches the first optical parameter in the image at each grayscale includes:

[0028] According to the first optical parameters and the second optical parameters of each image screen, the first power supply signal voltages corresponding to the light-emitting sub-pixels of different light-emitting colors in the second display area are adjusted respectively, so that the brightness and chromaticity of the second display area under each image screen match the brightness and chromaticity of the first display area.

[0029] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0030] A grayscale acquisition module is used to acquire reference grayscale values ​​corresponding to each sub-area in the second display area; the light-emitting sub-pixels in each sub-area are electrically connected to the corresponding first power signal lines;

[0031] A compensation acquisition module is configured to determine power signal compensation values ​​corresponding to each sub-region based on a power signal compensation relationship and a reference grayscale value. The power signal compensation relationship is a correspondence between grayscale values ​​and power signal compensation values. The power signal compensation values ​​are used to compensate for brightness differences between the light-emitting sub-pixels in the first display region and the light-emitting sub-pixels in the second display region when they share a first gamma parameter. The first gamma parameter is obtained by performing gamma correction on the first display region.

[0032] a voltage adjustment module, configured to adjust the first power signal voltage of each first power signal line according to the power signal compensation value of each sub-area;

[0033] Alternatively, the electronic device comprises:

[0034] An optical detection module, configured to obtain first optical parameters and second optical parameters of each image when the display panel displays images at each grayscale according to the first gamma parameter; the first optical parameter is the luminance corresponding to the first display area, and the second optical parameter is obtained by optical detection of the second display area; the first gamma parameter is obtained by gamma correction of the first display area;

[0035] a parameter matching module, configured to adjust the first power signal voltage of the second display area according to the first optical parameter and the second optical parameter, so that the second optical parameter matches the first optical parameter in the image at each grayscale;

[0036] The compensation determination module is used to determine the power signal compensation value corresponding to each gray scale according to the first power signal voltage corresponding to the image screen at each gray scale and the first reference power signal to generate a power signal compensation relationship.

[0037] In a fourth aspect, an embodiment of the present application provides an electronic device, the electronic device comprising: a processor and a memory storing computer program instructions;

[0038] When the processor executes the computer program instructions, the display panel driving method of the first aspect is implemented, or when the processor executes the computer program instructions, the compensation relationship acquisition method of the second aspect is implemented.

[0039] In a fifth aspect, an embodiment of the present application provides a computer storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the display panel driving method of the first aspect, or, when executed by a processor, implement the compensation relationship acquisition method of the second aspect.

[0040] Compared with the prior art, the driving method, compensation relationship acquisition method and related device of the display panel provided by the embodiment of the present application, the display panel includes at least two first display areas and a second display area with different transmittances, and the two display areas share a first Gamma parameter obtained by performing Gamma correction on the first display area. When the two display areas share the first Gamma parameter, there is a brightness difference between the two display areas. After the power signal compensation value of each sub-area is determined by the reference grayscale value of each sub-area in the second display area and the power signal compensation relationship, the first power signal voltage of each sub-area can be adjusted separately according to the power signal compensation value to adjust the cross-voltage received by the light-emitting sub-pixel of the second display area, reduce the brightness difference when the light-emitting sub-pixels of the two display areas share the first Gamma parameter, and ensure the display uniformity of the display panel. Under the premise of ensuring display uniformity, the display panel can save the time of performing Gamma correction on the second display area in the Gamma debugging link, thereby saving Gamma debugging time, reducing the production cycle time of the display panel, and improving production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 is a flow chart of a method for driving a display panel provided in one embodiment of the present application;

[0043] Figure 2 is a structural diagram of a display panel provided in one embodiment of the present application;

[0044] Figure 3 is a structural diagram of a display panel provided by another embodiment of the present application;

[0045] Figure 4 is a structural diagram of a display panel provided in another embodiment of the present application;

[0046] Figure 5 is a schematic flow chart of a method for driving a display panel provided in another embodiment of the present application;

[0047] Figure 6 is a schematic flow chart of a method for driving a display panel provided in yet another embodiment of the present application;

[0048] Figure 7 is a structural diagram of a display panel provided in yet another embodiment of the present application;

[0049] Figure 8 1 is a flow chart of a compensation relationship acquisition method provided in an embodiment of the present application;

[0050] Figure 9 is a flowchart of a compensation relationship acquisition method provided by another embodiment of the present application;

[0051] Figure 10 A schematic structural diagram of an electronic device provided in one embodiment of the present application;

[0052] Figure 11 A schematic structural diagram of an electronic device provided in another embodiment of the present application;

[0053] Figure 12 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0054] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0056] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.

[0057] With the continuous development of display panel technology, OLED (Organic Light-Emitting Diode) devices and other light-emitting devices have gradually been applied to various display panel products such as mobile phones, tablets, and notebooks.

[0058] In order to ensure that the display brightness changes of the display panel meet the needs of human eye perception, the display panel needs to be gamma-calibrated before leaving the factory to obtain the gamma register values ​​corresponding to the different binding point grayscales at each brightness level, so that the display panel can display light according to the gamma register value in accordance with the human eye's perception curve of brightness.

[0059] Display panels typically contain display areas that implement different functions. For example, the under-screen camera area, which houses the front-facing camera, has different sub-pixel arrangement and density, signal trace length and width, and pixel circuit layout design than conventional display areas. This results in different light transmittances in different display areas. Gamma correction for display areas with different light transmittances requires separate optical inspection using optical equipment, increasing the number of gamma corrections and the required correction time. This significantly impacts the display panel's tack time (TT) and reduces production efficiency.

[0060] In order to solve the above technical problems, the embodiments of the present application provide a display panel driving method, a compensation relationship acquisition method, and related devices. The display panel driving method provided by the embodiments of the present application is first introduced below.

[0061] Figure 1 A schematic flow chart of a method for driving a display panel provided by one embodiment of the present application is shown. The display panel includes a first display area and a second display area with different light transmittances. The method for driving the display panel includes:

[0062] S110, obtaining reference grayscale values ​​corresponding to each sub-region in the second display region; the light-emitting sub-pixels in each sub-region are electrically connected to the corresponding first power signal lines;

[0063] S120, determining power signal compensation values ​​corresponding to each sub-region based on a power signal compensation relationship and a reference grayscale value; the power signal compensation relationship being a correspondence between grayscale values ​​and power signal compensation values; the power signal compensation values ​​being used to compensate for brightness differences between light-emitting sub-pixels in the first display region and light-emitting sub-pixels in the second display region when they share a first gamma parameter; the first gamma parameter being obtained by performing gamma correction on the first display region;

[0064] S130 , adjusting the first power signal voltage of each first power signal line according to the power signal compensation value of each sub-region.

[0065] The display panel driving method provided in the embodiments of the present application can be applied to a display panel driving device. When the display panel includes two display areas with different light transmittances, the device can use the same gamma parameter to provide gamma voltages for the two display areas. By adjusting the first power signal received by each sub-area in the second display area, the brightness difference caused by the two display areas sharing the same gamma parameter is compensated. The display panel can be a PC, a television, a smart terminal, a tablet computer, etc. The specific form of the display panel is not limited in this embodiment.

[0066] In this embodiment, the display panel includes at least two first display areas and a second display area with different light transmittances. The two display areas share a first Gamma parameter, which is obtained by performing Gamma correction on the first display area during the Gamma adjustment process of the display panel. When the two display areas share the first Gamma parameter, there is a brightness difference in the second display area relative to the first display area. After determining the power signal compensation value of each sub-area based on the reference grayscale value of each sub-area and the power signal compensation relationship, the first power signal of each sub-area can be adjusted separately according to the power signal compensation value, so that the cross-voltage received by the luminous sub-pixels of each sub-area of ​​the second display area changes relative to the cross-voltage received by the luminous sub-pixels of the first display area, thereby reducing the brightness difference when the luminous sub-pixels of the two display areas share the first Gamma parameter, thereby ensuring the display uniformity of the display panel. Under the premise of ensuring display uniformity, the display panel can save the time of performing Gamma correction on the second display area during the Gamma debugging process, thereby saving Gamma debugging time, reducing the production cycle time of the display panel, and improving production capacity.

[0067] In S110, the display panel may generally include at least two first display areas and second display areas with different light transmittances. Figure 2 As shown, the display panel generally includes a first display area 10 and a second display area 20, wherein the first display area 10 may be a conventional display area and the second display area 20 may be an under-screen display area. The under-screen display area may be used to house a front-facing camera. In order for the front-facing camera to receive light, the layout design of the under-screen display area generally needs to be adjusted to have a higher light transmittance than that of the conventional display area. The differences in the layout design between the conventional display area and the under-screen display area may include the arrangement and density of the light-emitting sub-pixels, the layout design of the pixel circuit, and the length, width, or winding design of the signal traces.

[0068] Due to the difference in light transmittance between the two display areas, if gamma correction is performed on one of the display areas and a corresponding data signal is provided to the other display area based on the result of the gamma correction, the two display areas will produce different luminous brightness under the same data signal, resulting in a significant brightness difference between the two display areas in the display panel, affecting the consistency and display effect of the display panel. In the related art, optical equipment is usually used to perform gamma correction on the two display areas separately to obtain two sets of gamma parameters. Figure 3 As shown, S1 to Sn are signal lines extending into the display panel, and n is a natural number, such as 1080. The driver chip 30 can be connected to the signal lines and provide corresponding data signals to enable the display panel to display images at different grayscales. P1 can be the position where the optical device is placed when performing optical detection on the first display area 10, and P2 can be the position where the optical device is placed when performing optical detection on the second display area 20.

[0069] During actual display, the display panel can control the two display areas using two sets of gamma parameters separately to improve the brightness difference between the two display areas and enhance the consistency of the displayed image. However, during the gamma correction process, performing gamma correction on the two display areas separately will result in two corrections instead of one, increasing the total gamma adjustment time, affecting the production cycle time of the display panel, and further affecting the display panel production capacity.

[0070] In the embodiments of the present application, for two display areas with different light transmittances, gamma correction is performed only on the first display area during the gamma correction process, and the first gamma parameters corresponding to the first display area obtained from the gamma correction are burned into the storage module of the display panel. Since gamma correction is only performed once during the gamma debugging process, gamma debugging time can be saved compared to performing gamma correction on both display areas separately.

[0071] When the display panel displays an image, it can determine the grayscale values ​​corresponding to each luminous sub-pixel in the first display area based on the image data of the image to be displayed, and obtain the Gamma voltage corresponding to the grayscale values ​​of each luminous sub-pixel by reading the first Gamma parameter. The Gamma voltage is transmitted to each luminous sub-pixel in the first display area through the data signal line, which can drive the first luminous sub-pixel to emit light.

[0072] However, for each light-emitting sub-pixel in the second display area, if the first gamma parameter is used to generate the gamma voltage for each light-emitting sub-pixel and the voltage is supplied to each light-emitting sub-pixel in the second display area, the light-emitting sub-pixels in the two display areas will have different brightnesses under the gamma voltage corresponding to the same grayscale value, thereby affecting the consistency and display effect of the display panel. Therefore, after the gamma voltage is supplied to the light-emitting sub-pixels in the second display area, in order to reduce the brightness difference between the light-emitting sub-pixels in the two display areas, the voltage across the light-emitting elements in the light-emitting sub-pixels in the second display area can be changed by adjusting the power signal voltage. This ensures that when the gamma voltage generated by the first gamma parameter is supplied to the light-emitting sub-pixels in the second display area, the light-emitting brightness thereof is consistent with or close to that of the light-emitting sub-pixels in the first display area, thereby reducing the brightness difference that would otherwise occur when the light-emitting sub-pixels in the two display areas share the same first gamma parameter.

[0073] like Figure 4 As shown, the second display area 20 may include multiple sub-areas 21, each of which may include at least one light-emitting sub-pixel. Multiple light-emitting sub-pixels in the same sub-area 21 may be connected to corresponding first power signal lines, and different sub-areas 21 may be connected to different first power signal lines. That is, the display panel may be provided with the same number of first power signal lines as the sub-areas 21 in the second display area, and each first power signal line may be electrically connected to all light-emitting sub-pixels in the corresponding sub-area 21, thereby providing the same first power signal to all light-emitting sub-pixels in that sub-area 21. Different first power signal lines may provide first power signals of different voltages, so that light-emitting sub-pixels in two different sub-areas 21 may receive first power signals of different voltages.

[0074] It is understood that the first power signal can be a negative power signal. The light-emitting sub-pixel can include a pixel circuit and a light-emitting element. The anode of the light-emitting element can receive a positive power signal through the pixel circuit, and the cathode of the light-emitting element can be connected to the first power signal line to receive a negative power signal. When the pixel circuit is turned on, the light-emitting element can emit light under the drive of the positive power signal and the negative power signal, and the light luminance has a positive correlation with the cross-voltage between the positive power signal and the negative power signal.

[0075] In the related art, the cathode of the light-emitting element is entirely covered on the display panel. In this embodiment, an isolation structure is provided between the cathodes corresponding to the respective light-emitting sub-pixels, and the isolation structure can isolate the cathodes corresponding to the respective light-emitting sub-pixels.

[0076] Taking the cathodes corresponding to two adjacent light-emitting sub-pixels as an example, if the isolation structure between the two cathodes is a conductive material, the two cathodes can be electrically connected through the isolation structure. When the first power signal line is electrically connected to one of the cathodes, the same first power signal can be provided to the two cathodes.

[0077] If the isolation structure between the two cathodes is made of insulating material, the isolation structure can insulate the two cathodes. When the first power signal line is electrically connected to one of the cathodes, the other cathode will not receive the first power signal provided by the first power signal line.

[0078] After the second display area is divided into multiple sub-areas, the materials of each isolation structure can be specifically configured so that the isolation structure between the cathodes of any two light-emitting sub-pixels in the same sub-area is made of a conductive material, while the isolation structure between the cathodes of any two light-emitting sub-pixels in different sub-areas is made of an insulating material. Different first power signal lines are electrically connected to the cathodes of the light-emitting sub-pixels in different sub-areas, thereby providing different negative power signals to the light-emitting sub-pixels in different sub-areas.

[0079] When the display panel actually displays an image, it can determine the reference grayscale value corresponding to each sub-region in the second display region based on the image data of the image to be displayed. Within a single sub-region, the corresponding reference grayscale value can be calculated based on the grayscale values ​​of each luminescent sub-pixel within that sub-region. For example, the reference grayscale value of the sub-region can be a weighted average of the grayscale values ​​of each luminescent sub-pixel.

[0080] The reference grayscale value of the sub-region may also be calculated by determining the corresponding luminance of each luminescent sub-pixel based on the grayscale value of each luminescent sub-pixel in the sub-region using a grayscale-to-luminance conversion formula. The reference grayscale value of the sub-region may also be determined based on the calculated average luminance of each luminescent sub-pixel using the grayscale-to-luminance conversion formula.

[0081] In S120 , the apparatus may determine the power signal compensation value corresponding to each sub-region according to the power signal compensation relationship and the reference grayscale value corresponding to each sub-region.

[0082] After the grayscale value of a light-emitting sub-pixel in the second display area is determined, the Gamma voltage provided to the light-emitting sub-pixel needs to be determined according to the Gamma parameter.

[0083] However, since the first display area and the second display area share the same first Gamma parameter, and the first Gamma parameter is obtained by performing Gamma correction on the first display area during the Gamma correction process, the Gamma voltage obtained by the first Gamma parameter can make the actual luminous brightness of the luminous sub-pixels in the first display area match the target brightness of the corresponding grayscale value; and when the Gamma voltage is provided to the luminous sub-pixels in the second display area, the actual brightness of the luminous sub-pixels will differ from the target brightness of the corresponding grayscale value. At this time, by adjusting the signal voltage provided by the first power signal line through the power signal compensation value, the actual luminous brightness of the luminous sub-pixels in the second display area under the Gamma voltage can be compensated to match the target brightness of the corresponding grayscale value.

[0084] The above-mentioned power signal compensation relationship is the correspondence between the grayscale value and the power signal compensation value. That is, when the gamma voltage corresponding to a grayscale value is obtained by using the first gamma parameter and provided to the light-emitting sub-pixels in the second display area, since the first gamma parameter is obtained by performing gamma correction on the first display area, directly providing the gamma voltage to the light-emitting sub-pixels in the second display area will produce a brightness difference. After obtaining the power signal compensation value corresponding to the grayscale value through the power signal compensation relationship, the signal voltage of the first power signal can be adjusted, and the amplitude of the voltage adjustment is the power signal compensation value. Driven by the adjusted first power signal, the light-emitting sub-pixels in the second display area can match the target brightness of the corresponding grayscale value under the gamma voltage, thereby improving the brightness difference between the light-emitting sub-pixels in the second display area and the light-emitting sub-pixels in the first display area when the gamma voltage is provided by the first gamma parameter.

[0085] It should be noted that since the light-emitting sub-pixels in the same sub-region receive the same first power signal, corresponding power signal compensation values ​​can be determined for the multiple light-emitting sub-pixels in the same sub-region based on the reference grayscale value of the sub-region, and the signal voltage of the first power signal output via the first power signal line is adjusted to have an amplitude equal to the power signal compensation value. In this case, the first power signals received by the multiple light-emitting sub-pixels in the same sub-region are all compensated first power signals.

[0086] Please refer to Figure 5 As an optional embodiment, in each sub-region, light-emitting sub-pixels of different light-emitting colors are electrically connected to different first power signal lines respectively; the above S110 may include:

[0087] S210, obtaining grayscale values ​​corresponding to the light-emitting sub-pixels in each sub-area of ​​the second display area;

[0088] S220, determining a reference grayscale value of a light-emitting sub-pixel of each light-emitting color in each sub-region according to the grayscale values ​​corresponding to the light-emitting sub-pixels of different light-emitting colors in each sub-region;

[0089] The above-mentioned S120 may include:

[0090] S230 , determining power signal compensation values ​​corresponding to the light-emitting sub-pixels of each light-emitting color in each sub-region according to the power signal compensation relationship and the reference grayscale values ​​of the light-emitting sub-pixels of each light-emitting color.

[0091] In this embodiment, based on the image data of the image to be displayed, the grayscale values ​​of the luminous sub-pixels in each sub-region of the second display region can be determined, and a reference grayscale value for each sub-region can be calculated. Based on a pre-stored power signal compensation relationship, a power signal compensation value corresponding to the reference grayscale value of each sub-region can be determined. The first power signal voltage received by each sub-region can then be adjusted based on the power signal compensation value for each sub-region, thereby compensating for differences in luminous brightness when the two display regions share the same gamma parameter.

[0092] In S210, in each sub-region, light-emitting sub-pixels of different light-emitting colors are electrically connected to different first power signal lines. For example, taking a sub-region as an example, if the light-emitting sub-pixels in the sub-region include light-emitting sub-pixels of three colors, at least three first power signal lines are electrically connected to the light-emitting sub-pixels in the sub-region. Light-emitting sub-pixels of each color are connected to the same first power signal line, while light-emitting sub-pixels of different colors are connected to different first power signal lines.

[0093] When the display panel actually displays an image, the grayscale value corresponding to each light-emitting sub-pixel in the second display area can be determined according to the image data of the image to be displayed.

[0094] In S220, after determining the grayscale values ​​corresponding to each light-emitting sub-pixel in each sub-region, each light-emitting sub-pixel can be divided according to the light-emitting color to obtain the grayscale values ​​corresponding to the light-emitting sub-pixels of different light-emitting colors. For example, when the number of light-emitting sub-pixels with red, green and blue light-emitting colors in a single sub-region is 20, 20 and 40 respectively, each light-emitting sub-pixel can be divided into red sub-pixels, green sub-pixels and blue sub-pixels according to the light-emitting color of each light-emitting sub-pixel. For the red sub-pixel, the reference grayscale value of the red light-emitting sub-pixel in the sub-region can be calculated based on the grayscale values ​​corresponding to the 20 red sub-pixels. Similarly, for the green sub-pixel, the reference grayscale value of the green light-emitting sub-pixel can be calculated based on the grayscale values ​​corresponding to the 40 green sub-pixels; for the blue sub-pixel, the reference grayscale value of the blue light-emitting sub-pixel can be calculated based on the grayscale values ​​corresponding to the 20 blue sub-pixels.

[0095] In S230, based on the power signal compensation relationship and the reference grayscale values ​​corresponding to the luminous sub-pixels of different light-emitting colors, the power signal compensation values ​​corresponding to the first power signal lines electrically connected to the luminous sub-pixels of different colors in each sub-region can be determined respectively.

[0096] It should be noted that the power signal compensation relationship described above may include a correspondence between the grayscale value of each light-emitting sub-pixel and the power signal compensation value. For example, when the display panel includes red, green, and blue light-emitting sub-pixels, the power signal compensation relationship may include a correspondence between the grayscale value of the red light-emitting sub-pixel and the power signal compensation value, a correspondence between the grayscale value of the green light-emitting sub-pixel and the power signal compensation value, and a correspondence between the grayscale value of the blue light-emitting sub-pixel and the power signal compensation value.

[0097] Based on the reference grayscale value of the red sub-pixel within a single sub-region, a power signal compensation value corresponding to the red sub-pixel can be determined from a correspondence between the grayscale value of the red sub-pixel and the power signal compensation value. Voltage compensation can be performed on a signal voltage provided by a first power signal line electrically connected to the red sub-pixel in the sub-region based on the power signal compensation value.

[0098] Similarly, for the blue light-emitting sub-pixel, the power signal compensation value corresponding to the blue light-emitting sub-pixel can be determined from the correspondence between the grayscale value of the blue light-emitting sub-pixel and the power signal compensation value based on the reference grayscale value of the blue light-emitting sub-pixel; for the green light-emitting sub-pixel, the power signal compensation value corresponding to the green light-emitting sub-pixel can be determined from the correspondence between the grayscale value of the green light-emitting sub-pixel and the power signal compensation value based on the reference grayscale value of the green light-emitting sub-pixel.

[0099] After respectively determining the power signal compensation values ​​corresponding to the light-emitting sub-pixels of each color in a single sub-region, targeted voltage compensation can be performed on the first power signal provided by the first power signal line corresponding to the light-emitting sub-pixels of each color.

[0100] In S130, after determining the power signal compensation value for each sub-area, the first power signal voltage of the first power signal line electrically connected to each sub-area can be adjusted based on the power signal compensation value for each sub-area. For example, when the light-emitting sub-pixels in the first display area and the second display area share the same first gamma parameter at a certain grayscale value, if there is a difference in the luminance of the light-emitting sub-pixels in the first display area and the second display area, the first power signal voltage provided by the first power signal line can be adjusted to change the voltage across the light-emitting sub-pixels in the second display area, thereby adjusting the brightness of the light-emitting sub-pixels.

[0101] It should be noted that there is a difference between the luminous brightness of the luminous sub-pixels in the first display area and the luminous brightness of the luminous sub-pixels in the second display area, which means that there is a difference between the actual luminous brightness of the luminous sub-pixels in the second display area and the actual luminous brightness of the luminous sub-pixels in the first display area under the same grayscale.

[0102] In an exemplary embodiment, taking the first power signal provided by the first power signal line as a negative power signal, the power management chip of the display panel can provide a 4.6V positive power signal, i.e., an ELVDD signal, to the pixels in the first display area; and can provide a -3V negative power signal, i.e., an ELVSS signal, to the pixels in the first display area.

[0103] When the power management chip provides a 4.6V positive power signal and a -3V negative power signal to the sub-pixels in the second display area, the sub-pixels in both display areas receive the same voltage across the display area. However, due to the different transmittances and layout designs of the two display areas, the sub-pixels in the two display areas will have different brightness levels under the same gamma voltage and voltage across the display area.

[0104] If the luminance of the sub-pixels in the first display area at a certain grayscale value is higher than that of the sub-pixels in the second display area, the signal voltage of the negative power supply signal received by the sub-pixels can be lowered by reducing the signal voltage of the first power supply signal line. When the negative power supply signal received by the sub-pixels in the second display area decreases, the voltage across the line increases, thereby increasing the luminance of the sub-pixels. In other words, by reducing the first power supply signal voltage, the luminance of the sub-pixels in the second display area can be increased. Conversely, by increasing the first power supply signal voltage, the luminance of the sub-pixels in the second display area can be reduced.

[0105] Based on the brightness difference between the luminous sub-pixels in the two display areas, the first power supply signal can be adjusted so that when the luminous sub-pixels in the second display area receive the gamma voltage corresponding to the first gamma parameter, they can adjust their luminance using the compensated first power supply signal voltage, thereby reducing the brightness difference with the luminous sub-pixels in the first display area and improving the display consistency of the display panel. Furthermore, because the two display areas share the same first gamma parameter, gamma correction time for the second display area can be omitted during the gamma correction process of the display panel, thereby reducing the number of gamma corrections and the correction time, shortening the production cycle of the display panel, and increasing the production efficiency of the display panel.

[0106] Please refer to Figure 6 As an optional embodiment, the above S130 may include:

[0107] S310, determining a first compensated power signal for each sub-region based on a first reference power signal and a power signal compensation value for each sub-region; the first reference power signal is a first power signal voltage received by a light-emitting sub-pixel in the first display region;

[0108] S320 , providing first compensation power signals corresponding to the respective sub-regions through the respective first power signal lines.

[0109] In this embodiment, the first power signal voltage received by the light-emitting sub-pixels in the first display area is a first reference power signal. After determining the power signal compensation values ​​corresponding to the sub-areas of the second display area, the first reference power signal and the power signal compensation values ​​are summed to obtain a compensated first compensated power signal corresponding to each sub-area. Under the corresponding first compensated power signal, each sub-area can reduce the brightness difference with the first display area, thereby improving the display consistency of the display panel.

[0110] In S310 , when the first power signal is not compensated, the signal voltage provided by the first power signal line is a first reference power signal. The first reference power signal may be the first power signal voltage received by each light-emitting sub-pixel in the first display area.

[0111] For the second display area, after determining the power signal compensation value for each sub-area in the second display area, a first compensated power signal corresponding to each sub-area can be calculated based on the signal voltage of the first reference power signal and each power signal compensation value. Taking a single sub-area as an example, the signal voltage of the first compensated power signal corresponding to that sub-area is the sum of the signal voltage of the first reference power signal and the power signal compensation value corresponding to that sub-area.

[0112] In S320, after calculating the first compensation power signal corresponding to each sub-region, the first compensation power signal corresponding to each sub-region can be provided via each first power signal line, so that the light-emitting sub-pixels in each sub-region receive the compensated first compensation power signal. Taking a single light-emitting sub-pixel as an example, by adjusting the signal voltage of the first power signal received by the light-emitting sub-pixel, the cross-voltage received by the light-emitting sub-pixel can be changed. The cross-voltage received by a single light-emitting sub-pixel has a positive correlation with the luminous brightness. By changing the cross-voltage, the luminous brightness of the light-emitting sub-pixel can be adjusted so that the luminous brightness of the light-emitting sub-pixels in the second display region approaches the luminous brightness of the light-emitting sub-pixels in the first display region when receiving the same gamma voltage. In other words, the luminous difference between the light-emitting sub-pixels in the two display regions when receiving the same gamma voltage is reduced.

[0113] As an optional embodiment, in the second display area, each sub-area includes a light-emitting sub-pixel.

[0114] In this embodiment, each sub-area in the second display area includes only one light-emitting sub-pixel. That is, each light-emitting sub-pixel in the second display area is connected to the corresponding first power signal line. The first power signal of each light-emitting sub-pixel can be independently controlled by the corresponding first power signal line. By adjusting the signal voltage provided by each first power signal line, any two light-emitting sub-pixels in the second display area can receive different first power signals, thereby specifically adjusting the cross-voltage received by each light-emitting sub-pixel. Figure 7 As shown, each sub-area in the second display area 20 includes a light-emitting sub-pixel 211. Each light-emitting sub-pixel 211 in the second display area 20 is electrically connected to the power management chip 40 via a first power signal line. The power management chip 40 can be provided separately from the driver chip 30 or integrated into the driver chip 30.

[0115] Figure 7 ELVSS1_R, ELVSS1_G, and ELVSS1_B are shown as first power signal lines electrically connected to one red, one green, and one blue sub-pixel 211, respectively. If there are m red sub-pixels in the second display area 20, ELVSS1_R through ELVSSm_R are electrically connected to the m red sub-pixels, respectively. Similarly, ELVSS1_G through ELVSSm_G are electrically connected to the m green sub-pixels, respectively; and ELVSS1_B through ELVSSm_B are electrically connected to the m blue sub-pixels, respectively.

[0116] It should be noted that when each sub-region includes only a single luminous sub-pixel, the reference grayscale value of the sub-region is the grayscale value corresponding to the luminous sub-pixel in the image to be displayed.

[0117] The embodiment of the present application also provides a compensation relationship acquisition method, Figure 8 A flow chart of a compensation relationship acquisition method provided by an embodiment of the present application is shown. The compensation relationship acquisition method includes:

[0118] S410, when the display panel displays images at various grayscales according to the first gamma parameter, obtaining first optical parameters and second optical parameters of each image; the first optical parameter is the luminous brightness corresponding to the first display area, and the second optical parameter is obtained by optically detecting the second display area; the first gamma parameter is obtained by performing gamma correction on the first display area;

[0119] S420, adjusting the first power signal voltage of the second display area according to the first optical parameter and the second optical parameter, so that the second optical parameter in the image at each grayscale matches the first optical parameter;

[0120] S430 , determining power signal compensation values ​​corresponding to respective gray levels according to respective first power signal voltages corresponding to respective image frames at respective gray levels and the first reference power signal, so as to generate a power signal compensation relationship.

[0121] In this embodiment, after performing gamma correction on the first display area, the display panel can display images at various grayscales based on the first gamma parameters. Because there is a brightness difference between the two display areas at each grayscale, the first power signal voltage received by the light-emitting sub-pixels in the second display area can be adjusted for each grayscale image, such that the brightness difference between the two display areas is reduced to a level where the first optical parameters match the second optical parameters. When the optical parameters of the two display areas match, the difference between the first power signal voltage received by the light-emitting sub-pixels in the two display areas and the first reference power signal is the power signal compensation value required to perform voltage compensation on the second display area.

[0122] In S410, in order to enable two display areas with different transmittances in the display panel to share the Gamma voltage corresponding to the first Gamma parameter for light drive control, it is necessary to determine the power signal compensation relationship corresponding to the display panel before the display panel leaves the factory, and store the power signal compensation relationship in the storage module of the display panel.

[0123] The power signal compensation relationship can be obtained by selecting a display panel and optically inspecting the first display area using an optical device to obtain the actual luminance of the first display area. The gamma voltage is adjusted to match the actual luminance of the first display area with the target luminance corresponding to the grayscale of each binding point. The gamma voltage at this matching level is used as the gamma voltage corresponding to the grayscale of each binding point. The corresponding relationship between the grayscale of the binding point and the gamma voltage is the first gamma parameter.

[0124] After performing gamma correction on the first display panel to obtain the first gamma parameter, gamma voltages corresponding to each grayscale value can be provided to the light-emitting sub-pixels in the first display area and the second display area according to the first gamma parameter, so that the display panel can display images at each grayscale.

[0125] It can be understood that, taking the grayscale range of 0-255 as an example, when performing gamma correction, optical detection and matching are performed through optical equipment to obtain the gamma voltage corresponding to some binding point grayscales, while the gamma voltage corresponding to non-binding point grayscales can be obtained by interpolation calculation of the gamma voltage of the binding point grayscale.

[0126] When driving the display panel to display image images at various grayscales, the gamma voltage corresponding to each grayscale value in the grayscale range of 1-255 can be obtained according to the first gamma parameter and provided to the light-emitting sub-pixels in the first display area and the second display area, so that the display panel can display the image images at each grayscale value in the grayscale range of 1-255.

[0127] Taking a single grayscale value as an example, when the display panel is driven to display an image at grayscale 31, the first display area and the second display area can be optically detected by an optical device to obtain first optical parameters and second optical parameters.

[0128] It should be noted that, since the first Gamma parameter is obtained by performing Gamma correction on the first display area, the actual luminous brightness of the first display area is consistent with the target brightness. Therefore, when driving the display panel to display an image at grayscale 31, the first display area can be optically detected by an optical device to obtain the actual luminous brightness of the first display area; or the target brightness value corresponding to grayscale 31 can be directly obtained based on the current target brightness level, the Gamma2.2 coefficient, and the conversion formula between grayscale and brightness. That is, the first optical parameter can be the luminous brightness corresponding to the first display area, which can be obtained by detection by an optical device or calculated based on the grayscale value. If the grayscale value calculation method is adopted, the process of optically detecting the first display area can be omitted, thereby shortening the optical detection time.

[0129] For the second display area, since the first gamma parameter is obtained by performing gamma correction on the first display area, there is a brightness difference between the actual luminance of the second display area and the target brightness. The device can optically detect the second display area using an optical device to obtain the actual luminance of the second display area when displaying an image at grayscale 31, i.e., the second optical parameter.

[0130] In S420, after obtaining the first optical parameters of the first display area and the second optical parameters of the second display area in each grayscale image, the first power signal voltage provided by the first power signal line can be adjusted based on the first optical parameters and the second optical parameters in each grayscale image. Since the first power signal line can provide the first power signal to the light-emitting sub-pixels in the second display area, this is equivalent to adjusting the first power signal voltage of each light-emitting sub-pixel in the second display area.

[0131] It should be noted that the second display area may include multiple sub-areas, each sub-area is connected to the corresponding first power signal line. At this time, it is necessary to adjust the first power signal voltage provided by all first power signal lines so that each light-emitting sub-pixel in the second display area receives the same first power signal voltage.

[0132] By adjusting the first power signal voltage received by each light-emitting sub-pixel in the second display area, the voltage across each light-emitting sub-pixel can be changed, thereby changing the actual luminance of the second display area. While adjusting the first power signal voltage, the second display area can be optically inspected using an optical device to obtain second optical parameters of the second display area under different first power signal voltages.

[0133] For a single grayscale image, using a 31-grayscale image as an example, by adjusting the first power supply voltage of the second display area and detecting the second optical parameters of the second display area, it is possible to determine that the second optical parameters match the first optical parameters when the actual luminous brightness of the second display area matches that of the first display area, and record the first power supply voltage of the second display area at that time. The voltage difference between this first power supply voltage and the signal voltage of the first power supply signal received by the light-emitting sub-pixels in the first display area is the voltage offset of the first power supply signal of the second display area when the actual luminous brightness of the second display area matches that of the first display area.

[0134] In each grayscale image frame from 1 to 255, the first power supply voltage of the second display area needs to be adjusted separately to ensure that the actual luminous brightness of the two display areas matches. In each grayscale image frame, when the first optical parameters match the second optical parameters, the voltage offset of the first power supply signal of the second display area can be determined based on the voltage difference of the first power supply signals of the two areas.

[0135] As an optional embodiment, the above S420 may include:

[0136] Based on the first and second optical parameters of each image, the first power signal voltages corresponding to the light-emitting sub-pixels of different light-emitting colors in the second display area are adjusted respectively, so that the brightness and chromaticity of the second display area in each image match the brightness and chromaticity of the first display area. When the grayscale image is white, the chromaticity in the first optical parameter can be the color coordinates (CIEx = 0.300, CIEy = 0.315).

[0137] In this embodiment, the optical parameters may include luminance and chromaticity. Taking a single grayscale as an example, the first optical parameter is the luminance and chromaticity of the first display area under the grayscale image. The luminance may be the actual luminance detected by an optical device or a target brightness calculated based on the grayscale value.

[0138] In the second display area, light-emitting sub-pixels of different light-emitting colors are connected to different first power signal lines. For example, the second display area may include multiple sub-areas, each of which may include at least one of the three colors of light-emitting sub-pixels: red, green, and blue. In this case, all red light-emitting sub-pixels in the sub-area are connected to the same first power signal line, all blue light-emitting sub-pixels are connected to the same first power signal line, and all green light-emitting sub-pixels are connected to the same first power signal line. Using three different first power signal lines, different first power signals can be provided to light-emitting sub-pixels of different colors in a single sub-area.

[0139] Based on the second optical parameter obtained by optically detecting the second display area using an optical device, the first power signal voltages corresponding to the light-emitting sub-pixels of different light-emitting colors can be adjusted separately. For example, the same first power signal voltage can be provided to the red light-emitting sub-pixels in all sub-areas, the same first power signal voltage can be provided to the blue light-emitting sub-pixels in all sub-areas, and the same first power signal voltage can be provided to the green light-emitting sub-pixels in all sub-areas.

[0140] By adjusting the three first power signal voltages separately, the brightness of the three light-emitting sub-pixels in the second display area and the chromaticity of the second display area can be changed. By continuously adjusting the three first power signal voltages and detecting the adjusted brightness and chromaticity of the second display area in real time, the three first power signal voltages corresponding to the three color light-emitting sub-pixels can be determined when the brightness and chromaticity of the second display area match those of the first display area. By calculating the difference between these three first power signal voltages and the first reference power signal, the power signal compensation values ​​corresponding to the three light-emitting sub-pixels at that grayscale can be obtained.

[0141] In an exemplary embodiment, Figure 7As shown, ELVSS1_R to ELVSSm_R are electrically connected to m red light-emitting sub-pixels respectively; ELVSS1_G to ELVSSm_G are electrically connected to m green light-emitting sub-pixels respectively; and ELVSS1_B to ELVSSm_B are electrically connected to m blue light-emitting sub-pixels respectively.

[0142] During the process of adjusting the first power signal voltage, the signal voltages from ELVSS1_R to ELVSSm_R are the same, the signal voltages from ELVSS1_G to ELVSSm_G are the same, and the signal voltages from ELVSS1_B to ELVSSm_B are the same.

[0143] Taking an image at grayscale 1 as an example, by adjusting the three first power signal voltages separately and detecting the brightness and chromaticity in the second display area in real time, it is possible to determine that the voltage offsets of the three first power signal voltages relative to the first reference power signal are ΔR_1, ΔG_1, and ΔB_1, respectively, when the brightness and chromaticity in the second display area match those in the first display area. ΔR_1, ΔG_1, and ΔB_1 are the power signal compensation values ​​corresponding to the red, green, and blue light-emitting sub-pixels at grayscale 1, respectively.

[0144] By adjusting the three first power signal voltages for images ranging from grayscale 1 to grayscale 255, the brightness and chromaticity of the second display area within each grayscale image match those of the first display area. This results in ΔR_1-ΔR_255, ΔG_1-ΔG_255, and ΔB_1-ΔB_255, respectively. ΔR_1-ΔR_255 are the power signal compensation values ​​corresponding to the red sub-pixels for grayscales 1-255; ΔG_1-ΔG_255 are the power signal compensation values ​​corresponding to the green sub-pixels for grayscales 1-255; and ΔB_1-ΔB_255 are the power signal compensation values ​​corresponding to the blue sub-pixels for grayscales 1-255.

[0145] In S430, in each grayscale image, by adjusting the first power signal voltage of the second display area so that the second optical parameters match the first optical parameters, the difference between the first power signal voltage received by the second display area and the first reference power signal received by the first display area can be calculated to obtain a power signal compensation value corresponding to each grayscale. A power signal compensation relationship can be generated based on each grayscale from 1 to 255 and its corresponding power signal compensation value.

[0146] The display panel may include multiple brightness levels, for example, HDR (High Dynamic Range Imaging), HBM (High Brightness Monitor) and multiple Normal brightness levels. The maximum brightness values ​​under the Gamma band corresponding to different target brightness levels are not the same. For example, the brightness value of each luminous pixel at the maximum grayscale is higher under the HRD brightness level and the HBM brightness level. For example, the brightness value of the display panel at the highest grayscale of the HDR brightness level can reach 100nit or above, and the brightness value of the display panel at the HBM brightness level can reach 700nit or above. Multiple Normal brightness levels can correspond to 460nit, 300nit, 120nit, 60nit, 20nit, 10nit, 6nit or other luminous brightness, respectively, and are not limited here.

[0147] After determining a brightness level, gamma correction can be performed on the first display area at the brightness level to obtain a first gamma parameter, and the compensation relationship between each grayscale value and the power signal compensation value at the brightness level can be obtained through each grayscale image screen in the 1-255 grayscale. The power signal compensation relationship is the power signal compensation relationship corresponding to the brightness level. For other brightness levels, the above-mentioned gamma correction and the optical parameter matching of the two display areas under each grayscale image screen can be repeated to obtain the power signal compensation relationship at other brightness levels. The device can store the power signal compensation relationship corresponding to each brightness level in the display panel. The display panel can determine the corresponding power signal compensation relationship according to the current brightness level during actual display, and determine the corresponding power signal compensation value from the power signal compensation relationship.

[0148] After storing the power signal compensation relationship, the display panel can perform gamma correction only on the first display area during the gamma debugging process, without having to perform gamma correction on the second display area, thereby reducing the number of gamma corrections during the gamma debugging process. The luminous sub-pixels in the second display area can share the first gamma parameters with the luminous sub-pixels in the first display area, and the brightness difference between them and the luminous sub-pixels in the first display area can be compensated by adjusting the signal voltage of the first power signal. When the display panel includes two display areas with different transmittances, the gamma debugging process can be completed through a single gamma correction process, which greatly reduces the debugging time of the gamma debugging process, reduces the production cycle time of the display panel, and increases the production capacity of the display panel.

[0149] Please refer to Figure 9As an optional embodiment, the above S430 may include:

[0150] S510, for a plurality of display panels, determining a power signal compensation value corresponding to each grayscale according to a first power signal voltage corresponding to an image screen at each grayscale of each display panel and a first reference power signal;

[0151] S520, determining power signal compensation characteristic values ​​corresponding to respective gray levels according to power signal compensation values ​​corresponding to the plurality of display panels;

[0152] S530 , generating a power signal compensation relationship according to each gray scale and its corresponding power signal compensation characteristic value.

[0153] In this embodiment, optical parameter matching can be performed on multiple display panels for each grayscale image to obtain multiple power signal compensation values ​​corresponding to each grayscale. Based on the multiple power signal compensation values, a power signal compensation characteristic value corresponding to each grayscale can be obtained using an average calculation or other calculation method. By performing matching on multiple display panels to obtain the power signal compensation characteristic value, deviations in the derived power signal compensation value due to anomalies in a single display panel can be avoided, thereby improving the accuracy and stability of the power signal compensation relationship.

[0154] In S510, in the method for obtaining the power signal compensation relationship, a portion of the display panels may be selected from the plurality of display panels, and optical parameter matching of two display areas under each grayscale image is performed on each selected display panel, thereby obtaining a first power signal and a first reference power signal for each display panel when the optical parameters are matched under each grayscale image.

[0155] For each grayscale image, the difference between the first power signal and the first reference power signal obtained by each display panel during matching is the power signal compensation value for each display panel at the corresponding grayscale. For example, taking a single grayscale image as an example, after selecting 10 display panels for optical parameter matching in the above embodiment, 10 power signal compensation values ​​can be obtained.

[0156] In S520 , after obtaining the power signal compensation values ​​corresponding to the plurality of display panels in each grayscale image frame, the power signal compensation characteristic values ​​corresponding to each grayscale may be determined.

[0157] In an exemplary embodiment, taking a grayscale image as an example, after selecting 10 display panels and performing optical parameter matching on two display areas to obtain 10 power signal compensation values, a power signal compensation characteristic value corresponding to the grayscale can be determined based on the 10 power signal compensation values. The power signal compensation characteristic value can be the average or weighted average of multiple power signal compensation values, or can be calculated using other calculation formulas for multiple power signal compensation values.

[0158] For example, a display panel with red, green, and blue light-emitting sub-pixels can be used to match the optical parameters of two display areas in a 1-grayscale image. This allows the power signal compensation values ​​corresponding to the 10 red sub-pixels to be determined. Based on these values, the corresponding power signal compensation characteristic value ΔR_1_AVE can be calculated. Similarly, ΔG_1_AVE can be calculated based on the power signal compensation values ​​for the 10 green sub-pixels, and ΔB_1AVE can be calculated based on the power signal compensation values ​​for the 10 blue sub-pixels.

[0159] After optical parameter matching of two display areas under 1 grayscale image screen-255 grayscale image screen is performed on 10 display panels respectively, power signal compensation characteristic values ​​ΔR_1_AVE-ΔR_255_AVE, ΔG_1_AVE-ΔG_255_AVE, and ΔB_1_AVE-ΔB_255_AVE can be obtained.

[0160] In S530 , after the power signal compensation characteristic value corresponding to each gray scale is determined, a power signal compensation relationship may be generated according to each gray scale and its corresponding power signal compensation characteristic value.

[0161] It should be noted that after optical parameter matching is performed on some display panels and a power signal compensation relationship is obtained, the power signal compensation relationship can be stored in the power management chip of other display panels. After storing the power signal compensation relationship, other display panels can only perform gamma correction on the first display area during the gamma debugging process to complete the gamma debugging process. The process of storing the power signal compensation relationship in the power management chip of the display panel can be before or after gamma debugging, and is not limited here.

[0162] The light-emitting sub-pixels in the second display area of ​​the display panel can share the first gamma parameter, and the brightness difference generated by the light-emitting sub-pixels in the second display area and the first display area can be compensated by adjusting the signal voltage of the first power supply signal. When the display panel includes two display areas with different transmittances, the gamma debugging link can be completed through a single gamma correction process, which greatly reduces the debugging time of the gamma debugging link, reduces the production cycle time of the display panel, and increases the production capacity of the display panel.

[0163] In an optional embodiment, if the display panel includes three or more display areas with different transmittances, after performing gamma correction on one of the display areas, the optical parameters of each of the other display areas can be matched with the display area, and the power signal compensation relationship of each of the other display areas relative to the display area can be obtained. For example, when the display panel includes three display areas with different transmittances, the power signal compensation relationship of the second display area relative to the first display area and the power signal compensation relationship of the third display area relative to the first display area can be determined respectively by using the above-mentioned embodiments. During the gamma debugging process, gamma correction can still be performed only on the first display area to save the time of two gamma corrections. As for the brightness difference caused by the three display areas sharing the same gamma parameter, the power signal compensation values ​​corresponding to the two display areas can be determined respectively through the two power signal compensation relationships. By adjusting the first power signal voltage, the brightness difference when the three display areas share the same gamma parameter can be reduced.

[0164] The embodiment of the present application further provides an electronic device 1000, such as Figure 10 As shown, the electronic device 1000 includes:

[0165] Grayscale acquisition module 1001, used to acquire reference grayscale values ​​corresponding to each sub-area in the second display area; the light-emitting sub-pixels in each sub-area are electrically connected to the corresponding first power signal lines;

[0166] Compensation acquisition module 1002 is configured to determine power signal compensation values ​​corresponding to each sub-region based on a power signal compensation relationship and a reference grayscale value. The power signal compensation relationship is a correspondence between grayscale values ​​and power signal compensation values. The power signal compensation values ​​are used to compensate for brightness differences between light-emitting sub-pixels in the first display region and light-emitting sub-pixels in the second display region when they share a first gamma parameter. The first gamma parameter is obtained by performing gamma correction on the first display region.

[0167] A voltage adjustment module 1003 is configured to adjust the first power signal voltage of each first power signal line according to the power signal compensation value of each sub-region;

[0168] Or, as Figure 11 As shown, the electronic device 1100 includes:

[0169] The optical detection module 1101 is configured to obtain first optical parameters and second optical parameters of each image when the display panel displays images at different grayscales according to the first gamma parameter. The first optical parameter is the luminance corresponding to the first display area, and the second optical parameter is obtained by optical detection of the second display area. The first gamma parameter is obtained by gamma correction of the first display area.

[0170] A parameter matching module 1102 is configured to adjust the first power signal voltage of the second display area according to the first optical parameter and the second optical parameter, so that the second optical parameter matches the first optical parameter in the image at each grayscale;

[0171] The compensation determination module 1103 is configured to determine power signal compensation values ​​corresponding to respective grayscales according to the first power signal voltages corresponding to the image frames at respective grayscales and the first reference power signal, so as to generate a power signal compensation relationship.

[0172] As an implementation of the present application, the grayscale acquisition module 1001 may include:

[0173] A grayscale acquisition unit, configured to acquire grayscale values ​​corresponding to the light-emitting sub-pixels in each sub-area of ​​the second display area;

[0174] a grayscale calculation unit, configured to determine a reference grayscale value of each light-emitting sub-pixel of each light-emitting color in each sub-region according to the grayscale values ​​corresponding to the light-emitting sub-pixels of different light-emitting colors in each sub-region;

[0175] The compensation acquisition module 1002 may include:

[0176] The compensation acquisition unit is used to determine the power signal compensation value corresponding to each light-emitting sub-pixel of each light-emitting color in each sub-area according to the power signal compensation relationship and the reference grayscale value of the light-emitting sub-pixel of each light-emitting color.

[0177] As an implementation of the present application, the voltage adjustment module 1003 may include:

[0178] a first compensation calculation unit, configured to determine a first compensated power signal for each sub-region based on a first reference power signal and a power signal compensation value for each sub-region; the first reference power signal being a first power signal voltage received by a light-emitting sub-pixel in the first display region;

[0179] The compensation providing unit is configured to provide first compensation power signals corresponding to the respective sub-regions through the respective first power signal lines.

[0180] As an implementation of the present application, the compensation determination module may include:

[0181] a second compensation calculation unit, configured to determine, for each of the plurality of display panels, a power signal compensation value corresponding to each grayscale according to the first power signal voltage corresponding to the image screen of each display panel at each grayscale and the first reference power signal;

[0182] An integrated calculation unit, configured to determine a power signal compensation characteristic value corresponding to each grayscale according to power signal compensation values ​​corresponding to each of the plurality of display panels;

[0183] The generating unit is configured to generate a power signal compensation relationship according to each gray scale and its corresponding power signal compensation characteristic value.

[0184] As an implementation of the present application, the parameter matching module 1102 may include:

[0185] The parameter matching unit is used to adjust the first power signal voltages corresponding to the light-emitting sub-pixels of different light-emitting colors in the second display area according to the first optical parameters and the second optical parameters of each image screen, so that the brightness and chromaticity of the second display area under each image screen match the brightness and chromaticity of the first display area.

[0186] Figure 12 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0187] The electronic device may include a processor 1201 and a memory 1202 storing computer program instructions.

[0188] Specifically, the processor 1201 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0189] Memory 1202 may include a large capacity memory for data or instructions. By way of example and not limitation, memory 1202 may include a hard disk drive (HDD), a floppy disk drive, flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 1202 may include removable or non-removable (or fixed) media. Where appropriate, memory 1202 may be internal or external to the electronic device. In certain embodiments, memory 1202 is a non-volatile solid-state memory.

[0190] In certain embodiments, the memory 1202 may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical / tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0191] The processor 1201 reads and executes computer program instructions stored in the memory 1202 to implement any one of the display panel driving methods or compensation relationship acquisition methods in the above embodiments.

[0192] In one example, the electronic device may further include a communication interface 1203 and a bus 1210. Figure 12 As shown, the processor 1201 , the memory 1202 , and the communication interface 1203 are connected via a bus 1210 and communicate with each other.

[0193] The communication interface 1203 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0194] Bus 1210 includes hardware, software or both, couples the parts of electronic equipment to each other.For example, but not limitation, bus can include accelerated graphics port (AGP) or other graphics bus, enhanced industry standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industry standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 1210 can include one or more buses. Although the present application embodiment describes and shows specific bus, the application considers any suitable bus or interconnection.

[0195] In addition, in conjunction with the display panel driving method or compensation relationship acquisition method in the above-mentioned embodiments, embodiments of the present application may provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any of the display panel driving methods or compensation relationship acquisition methods in the above-mentioned embodiments is implemented.

[0196] It should be understood that the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present application is not limited to the specific steps described and illustrated. Those skilled in the art can make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present application.

[0197] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. Programs or code segments can be stored in machine-readable media, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable media" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0198] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps. In other words, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0199] Aspects of the present disclosure have been described above with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit. It is also understood that each box in the block diagram and / or flowchart and the combination of the boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0200] The above is only a specific implementation method of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited to this. Any technician familiar with this technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the scope of protection of this application.

Claims

1. A method for driving a display panel, characterized in that: The display panel includes a first display area and a second display area with different light transmittances; the method includes: Obtaining reference grayscale values ​​corresponding to each sub-area in the second display area; electrically connecting the light-emitting sub-pixels in each sub-area to the corresponding first power signal lines; Determining power signal compensation values ​​corresponding to each sub-area based on a power signal compensation relationship and the reference grayscale value; the power signal compensation relationship being a correspondence between grayscale values ​​and power signal compensation values; the power signal compensation values ​​being used to compensate for brightness differences between the light-emitting sub-pixels in the first display area and the light-emitting sub-pixels in the second display area when they share a first gamma parameter; the first gamma parameter being obtained by performing gamma correction on the first display area; The first power signal voltage of each first power signal line is adjusted respectively according to the power signal compensation value of each sub-area.

2. The method for driving a display panel according to claim 1, wherein: In each sub-area, light-emitting sub-pixels of different light-emitting colors are electrically connected to different first power signal lines respectively; and obtaining the reference grayscale values ​​corresponding to each sub-area in the second display area includes: Obtaining grayscale values ​​corresponding to the light-emitting sub-pixels in each sub-area of ​​the second display area; Determining a reference grayscale value of a light-emitting sub-pixel of each light-emitting color in each sub-region according to the grayscale values ​​corresponding to the light-emitting sub-pixels of different light-emitting colors in each sub-region; The determining of the power signal compensation values ​​corresponding to the respective sub-regions according to the power signal compensation relationship and the reference grayscale value includes: The power signal compensation values ​​corresponding to the light-emitting sub-pixels of each light-emitting color in each sub-region are determined according to the power signal compensation relationship and the reference grayscale values ​​of the light-emitting sub-pixels of each light-emitting color.

3. The method for driving a display panel according to claim 1, wherein: The adjusting the first power signal voltage of each first power signal line according to the power signal compensation value of each sub-area includes: Determine a first compensated power signal for each sub-area based on a first reference power signal and a power signal compensation value for each sub-area; the first reference power signal is a first power signal voltage received by a light-emitting sub-pixel in the first display area; The first compensation power signal corresponding to each sub-area is provided respectively through each first power signal line.

4. The method for driving a display panel according to claim 1, wherein: In the second display area, each sub-area includes a light-emitting sub-pixel.

5. A compensation relationship acquisition method, characterized in that: The method comprises: When the display panel displays images at various grayscales according to the first gamma parameter, first optical parameters and second optical parameters of the images are obtained; the first optical parameter is the luminous brightness corresponding to the first display area, and the second optical parameter is obtained by optically detecting the second display area; the first gamma parameter is obtained by performing gamma correction on the first display area; adjusting the first power signal voltage of the second display area according to the first optical parameter and the second optical parameter, so that the second optical parameter matches the first optical parameter in the image at each grayscale; The power signal compensation values ​​corresponding to the respective gray levels are determined according to the first power signal voltages corresponding to the image frames at the respective gray levels and the first reference power signal, so as to generate a power signal compensation relationship.

6. The compensation relationship acquisition method according to claim 5, characterized in that: The determining of the power signal compensation values ​​corresponding to the respective grayscales according to the first power signal voltages corresponding to the image frames at the respective grayscales and the first reference power signal to generate the power signal compensation relationship includes: For a plurality of display panels, determining a power signal compensation value corresponding to each gray scale according to the first power signal voltage corresponding to the image screen of each display panel at each gray scale and the first reference power signal; determining power signal compensation characteristic values ​​corresponding to respective grayscales according to power signal compensation values ​​corresponding to respective display panels; A power signal compensation relationship is generated according to each gray scale and its corresponding power signal compensation characteristic value.

7. The compensation relationship acquisition method according to claim 5, characterized in that: The adjusting the first power signal voltage of the second display area according to the first optical parameter and the second optical parameter so that the second optical parameter matches the first optical parameter in the image at each grayscale includes: According to the first optical parameters and the second optical parameters of each image screen, the first power supply signal voltages corresponding to the light-emitting sub-pixels of different light-emitting colors in the second display area are adjusted respectively, so that the brightness and chromaticity of the second display area under each image screen match the brightness and chromaticity of the first display area.

8. An electronic device, characterized in that: The electronic device comprises: A grayscale acquisition module is used to acquire reference grayscale values ​​corresponding to each sub-area in the second display area; the light-emitting sub-pixels in each sub-area are electrically connected to the corresponding first power signal lines; a compensation acquisition module, configured to determine power signal compensation values ​​corresponding to respective sub-regions based on a power signal compensation relationship and the reference grayscale value; the power signal compensation relationship being a correspondence between grayscale values ​​and power signal compensation values; the power signal compensation values ​​being used to compensate for brightness differences between light-emitting sub-pixels in the first display region and light-emitting sub-pixels in the second display region when they share a first gamma parameter; the first gamma parameter being obtained by performing gamma correction on the first display region; a voltage adjustment module, configured to adjust the first power signal voltage of each first power signal line according to the power signal compensation value of each sub-area; Alternatively, the electronic device includes: an optical detection module, configured to obtain first optical parameters and second optical parameters of each image when the display panel displays images at each grayscale according to the first gamma parameter; the first optical parameter is the luminous brightness corresponding to the first display area, and the second optical parameter is obtained by optical detection of the second display area; the first gamma parameter is obtained by gamma correction of the first display area; a parameter matching module, configured to adjust the first power signal voltage of the second display area according to the first optical parameter and the second optical parameter, so that the second optical parameter matches the first optical parameter in the image at each grayscale; The compensation determination module is used to determine the power signal compensation value corresponding to each gray scale according to the first power signal voltage corresponding to the image screen at each gray scale and the first reference power signal to generate a power signal compensation relationship.

9. An electronic device, characterized in that: The electronic device includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the method for driving the display panel according to any one of claims 1 to 4 is implemented; or, when the processor executes the computer program instructions, the method for obtaining a compensation relationship according to any one of claims 5 to 7 is implemented.

10. A computer storage medium, characterized in that The computer storage medium stores computer program instructions, which, when executed by a processor, implement the display panel driving method described in any one of claims 1 to 4, or, when executed by a processor, implement the compensation relationship acquisition method described in any one of claims 5 to 7.

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