Gamma test method and device for display panel, equipment and medium

Abstract

The embodiment of the invention provides a gamma test method and device of a display panel, equipment and a medium, and relates to the technical field of gamma test of the display panel, and the method comprises the steps: controlling a target display panel to output a test picture of a first gray level order; controlling the target display panel to output a temperature correction picture of a second gray level order; the first gray scale order is not equal to the second gray scale order; and collecting actual brightness when the target display panel displays the test picture, and adjusting a target register data value of the target display panel according to the actual brightness. According to the method and the device, the test pictures of the first gray level are output at intervals, and the temperature correction pictures are inserted between the test pictures of the first gray level, so that the temperature of the light-emitting device corresponding to the test pictures of the first gray level output at intervals can be basically kept unchanged; therefore, the error between the gamma curve of the target display panel and the actually displayed gamma curve is smaller.

Description

Technical Field

[0001] The present application relates to the technical field of gamma testing of display panels, and in particular to a gamma testing method, device, equipment and medium for display panels. Background Art

[0002] With the development of display technology, in order to make the display effect more in line with the visual habits of the human eye, gamma adjustment must be performed after the display panel is manufactured. Gamma adjustment of the display panel requires the use of a gamma curve, which is a special tone curve. According to research, when the gamma value is 2.2, the image output by the display is the best image.

[0003] When adjusting the gamma curve of a display panel, it is necessary to test the brightness of the light-emitting device of the display panel at different grayscale levels to test the gamma curve of the display panel. However, in the prior art, there is a large error in the gamma curve test of the display panel, so that there is a large error between the gamma curve designed in the display panel and the gamma curve of the display panel when it is actually displayed. Summary of the invention

[0004] In order to overcome the technical problems mentioned in the above technical background, a first aspect of an embodiment of the present application provides a gamma test method for a display panel, the method comprising:

[0005] Controlling the target display panel to output a test picture of a first grayscale level;

[0006] Controlling the target display panel to output a temperature correction picture of a second grayscale level; the first grayscale level is not equal to the second grayscale level;

[0007] The actual brightness of the target display panel when displaying the test image is collected, and the target register data value of the target display panel at the first grayscale level is adjusted according to the actual brightness, and the target register data value corresponds to the corresponding target voltage value and target brightness value.

[0008] In a possible implementation manner, before the step of controlling the target display panel to output the temperature correction picture of the second grayscale level, the method further includes:

[0009] Based on the first grayscale, a second grayscale is determined; wherein the higher the first grayscale is, the lower the second grayscale is.

[0010] In a possible implementation, the step of controlling the target display panel to output a temperature-corrected picture with a second grayscale level includes:

[0011] Based on the first grayscale, determining the display pixel ratio of the temperature correction picture of the second grayscale; wherein the display pixel ratio is the ratio of the display pixels of the temperature correction picture to the total pixels of the target display panel; the display pixel ratio is negatively correlated with the first grayscale;

[0012] Based on the display pixel ratio, the target display panel is controlled to output a temperature-corrected picture with a second grayscale.

[0013] In a possible implementation, the step of determining the display pixel ratio of the temperature correction picture of the second grayscale based on the first grayscale includes:

[0014] Based on a preset value of the target display panel and the first grayscale, a display pixel ratio of the temperature correction picture of the second grayscale is determined; the preset value is related to a usage scenario of the target display panel.

[0015] In a possible implementation, the step of controlling the target display panel to output a temperature-corrected picture with a second grayscale level includes:

[0016] Based on the first grayscale, the duration of the temperature correction picture of the second grayscale is determined; the smaller the absolute value of the difference between the first grayscale and the preset grayscale is, the shorter the duration is.

[0017] In a possible implementation, after the step of acquiring the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the first grayscale according to the actual brightness, the method further includes:

[0018] The actual brightness of the test picture of the first grayscale is compared with the standard brightness of the first grayscale to determine the target brightness when the target display panel displays the test picture; wherein the standard brightness of the first grayscale is obtained by a target gamma curve.

[0019] In a possible implementation, the step of comparing the actual brightness of the test picture of the first grayscale with the standard brightness of the first grayscale to determine the target brightness when the target display panel displays the test picture includes:

[0020] Compare the actual brightness of the test picture of the first grayscale level with the preset brightness threshold, and calculate the absolute value of the brightness difference between the actual brightness of the test picture of the first grayscale level and the standard brightness of the first grayscale level, and take the actual brightness of the test picture with the smallest absolute value of the brightness difference and less than the preset brightness threshold as the target brightness when the target display panel displays the test picture.

[0021] In a possible implementation, the step of collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the first grayscale level according to the actual brightness, further includes:

[0022] Controlling the target display panel to output a test picture of the Nth grayscale level;

[0023] Controlling the target display panel to output a temperature correction picture of an Mth grayscale level; the Nth grayscale level is not equal to the Mth grayscale level;

[0024] Acquiring the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the Nth grayscale according to the actual brightness; wherein the Nth grayscale is a grayscale different from the first grayscale; and N and M are both natural numbers;

[0025] Preferably, after the step of collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the Nth grayscale according to the actual brightness, the method further includes:

[0026] A final gamma curve is determined according to the target register data value of each gray scale, and the final gamma curve is stored and tested.

[0027] In a second aspect, the present application provides a gamma test device for a display panel, the device comprising:

[0028] A first output module, used for controlling the target display panel to output a test picture of a first grayscale level;

[0029] A second output module, used for controlling the target display panel to output a temperature-corrected picture of a second grayscale level; the first grayscale level is not equal to the second grayscale level;

[0030] The acquisition module is used to acquire the actual brightness of the target display panel when displaying the test picture, and adjust the target register data value of the target display panel at the first grayscale level according to the actual brightness.

[0031] In a third aspect, the present application provides an electronic device, including a processor and a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions, and when the machine-executable instructions are executed by the processor, the gamma test method for the display panel provided in the present application is implemented.

[0032] In a fourth aspect, the present application provides a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions, and when the machine-executable instructions are executed by one or more processors, the gamma testing method for the display panel provided in the present application is implemented.

[0033] Compared with the prior art, this application has at least the following beneficial effects:

[0034] The embodiments of the present application propose a gamma test method, device, equipment and medium for a display panel. By outputting a test picture of a first grayscale level at intervals and inserting a temperature correction picture of a second grayscale level different from the first grayscale level between the test pictures of the first grayscale level, the temperature of the light-emitting device corresponding to the test picture of the first grayscale level output at intervals can be basically kept unchanged, thereby making the error between the gamma curve of the target display panel and the gamma curve during actual display smaller, thereby improving the display quality of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A flow chart of a gamma test method for a display panel provided in an embodiment of the present application;

[0037] Figure 2 A flowchart of another gamma testing method for a display panel provided in an embodiment of the present application;

[0038] Figure 3 A flowchart of a specific execution method of step S11 provided in an embodiment of the present application;

[0039] Figure 4 A flowchart of another gamma testing method for a display panel provided in an embodiment of the present application;

[0040] Figure 5 A flowchart of another gamma testing method for a display panel provided in an embodiment of the present application;

[0041] Figure 6 A flow chart of a gamma test method for storing and testing a gamma curve provided in an embodiment of the present application;

[0042] Figure 7 A schematic diagram of the structure of an electronic device of a hardware operating environment involved in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of a gamma testing device for a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the description of this application, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0048] It should be noted that, in the absence of conflict, different features in the embodiments of the present application may be combined with each other.

[0049] The current gamma test method for display panels mainly includes the following steps: continuously outputting images of each grayscale level; adjusting register data to obtain the target brightness of the images of each grayscale level; saving register data corresponding to the target brightness of the images of each grayscale level, and testing the gamma curve according to the register data. Since the images of each grayscale level are continuously output, and the light-emitting devices at each grayscale level (especially high grayscale levels) will generate heat, the heat generated by the light-emitting devices will affect the brightness of the light-emitting devices (the higher the temperature of the light-emitting devices, the lower their brightness), and the content displayed by the display panel is in a constantly changing state. Therefore, there is a large error in the gamma curve of the tested display panel, so that there is a large error between the gamma curve designed in the display panel and the gamma curve when the display panel is actually displayed.

[0050] In view of this, please refer to Figure 1 The embodiment of the present application provides a gamma test method for a display panel. The steps of the method are described in detail below. The method includes:

[0051] S10: Controlling the target display panel to output a test picture of a first grayscale.

[0052] In this embodiment, the target display panel is a display panel that needs to be tested for gamma, and the first grayscale level can be any grayscale level of the target display panel. For example, when the display panel is 8 bits, the first grayscale level can be any grayscale level in the range of 0-255.

[0053] S11: controlling the target display panel to output a temperature correction picture of a second grayscale; the first grayscale is not equal to the second grayscale.

[0054] In this embodiment, the second grayscale level may be related to the first grayscale level, for example, when the first grayscale level is the 255th grayscale level, the second grayscale level may be the 0th grayscale level or the 100th grayscale level; generally, the higher the first grayscale level is, the lower the second grayscale level is. In this way, the second grayscale level may be set more reasonably according to the first grayscale level actually output. The second grayscale level may also be fixed, that is, when the first grayscale level of different grayscale levels is output, the second grayscale level is the same grayscale level, for example, the second grayscale level is fixed to the 127th grayscale level. In this way, the time for adjusting the second grayscale level may be reduced.

[0055] After outputting the test picture of the first grayscale level, the target display panel is controlled to output a temperature correction picture of the second grayscale level that is not equal to the first grayscale level, and the temperature correction picture is used to balance the temperature of the light-emitting device corresponding to the same test picture of the first grayscale level output each time.

[0056] For example, when testing the 255th grayscale, the test screen of the 255th grayscale is output first, and then the temperature correction screen of the 127th grayscale is inserted. Since the temperature of the light-emitting device corresponding to the screen with a low grayscale is lower than the temperature of the light-emitting device corresponding to the screen with a relatively high grayscale, inserting the temperature correction screen of the 127th grayscale can reduce the temperature of the light-emitting device corresponding to the test screen.

[0057] S12: collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the first grayscale level according to the actual brightness, the target register data value corresponding to the corresponding target voltage value and target brightness value.

[0058] In this embodiment, step S11 and step S12 can be performed synchronously, that is, after outputting the test picture of the first grayscale level, the actual brightness of the target display panel when displaying the test picture and controlling the target display panel to output the temperature correction picture of the second grayscale level can be collected at the same time. For example, after outputting the test picture of the 255th grayscale level, the actual brightness of the test picture of the 255th grayscale level can be collected by the brightness collector at the same time, and the temperature correction picture of the 127th grayscale level can be inserted.

[0059] Testing the target brightness of a test picture of the first grayscale level may require adjusting the target register data value of the target display panel multiple times and outputting the test picture of the first grayscale level multiple times. The target brightness of the test picture is a brightness close to the standard brightness of the target gamma curve at the first grayscale level, and the target gamma curve is a gamma curve known in advance, such as a target gamma curve corresponding to gamma 2.2.

[0060] For example, after the test picture of the 255th grayscale is output, the actual brightness of the test picture of the 255th grayscale collected by the brightness collector is greatly different from the standard brightness of the target gamma curve at the 255th grayscale. Then, the target register data value of the target display panel is adjusted according to the actual brightness of the test picture of the 255th grayscale, for example, the voltage value of the light-emitting device of the target display panel is adjusted through the register to adjust the brightness of the test picture of the 255th grayscale, and then the test picture of the 255th grayscale after the brightness adjustment is output again.

[0061] However, before outputting the test picture of the 255th grayscale again, it is necessary to insert the temperature correction picture of the second grayscale to make the temperature of the light-emitting device corresponding to the test picture of the 255th grayscale output again basically consistent with the temperature of the light-emitting device corresponding to the test picture of the 255th grayscale output last time. After inserting the temperature correction picture of the second grayscale for a period of time, the test picture of the 255th grayscale is output again, and the brightness of the test picture is collected. This cycle is repeated until the actual brightness of the test picture of the 255th grayscale output is close to the standard brightness corresponding to the 255th grayscale on the target gamma curve, and the actual brightness of the test picture is used as the target brightness.

[0062] In this way, when the test picture of the 255th grayscale level is output at intervals, the temperature of the light-emitting device corresponding to the test picture of the 255th grayscale level output each time can be made basically consistent, thereby reducing the error between the actual brightness of the test picture of the 255th grayscale level and the standard brightness corresponding to the 255th grayscale level on the target gamma curve, thereby making the target register data value corresponding to the target brightness of the test picture of the 255th grayscale level more accurate.

[0063] Based on the same test method, the remaining first grayscales are tested in turn. Since the temperature correction screen of the second grayscale is inserted between the test screens of the first grayscale, the temperature correction screen of the second grayscale can not only balance the temperature of the light-emitting device corresponding to the different actual brightness of the test screen of a single first grayscale, but also balance the temperature of the light-emitting device when testing all the first grayscales. For example, when the first grayscale is tested as the 255th grayscale and the 100th grayscale respectively, the inserted second grayscale can not only make the temperature of the light-emitting device corresponding to the test screen of the 255th grayscale output multiple times basically consistent, make the temperature of the light-emitting device corresponding to the test screen of the 100th grayscale output multiple times basically consistent, but also make the temperature of the light-emitting device corresponding to the test screen of the 255th grayscale basically consistent with the temperature of the light-emitting device corresponding to the test screen of the 100th grayscale.

[0064] Based on the above design, this embodiment outputs the same first grayscale test screen at intervals, and inserts a second grayscale temperature correction screen different from the first grayscale between the first grayscale test screens. This can keep the temperature of the light-emitting device corresponding to the first grayscale test screen output at intervals basically unchanged, thereby making the error between the gamma curve of the target display panel and the gamma curve during actual display smaller, thereby improving the display quality of the display panel.

[0065] In one possible implementation, see Figure 2 , before the step of controlling the target display panel to output a temperature correction picture of a second grayscale level, it also includes: S101: determining a second grayscale level based on the first grayscale level; wherein, the higher the first grayscale level, the lower the second grayscale level.

[0066] Since the temperature of the light emitting device corresponding to the picture with lower grayscale is lower, the second grayscale may be determined according to the first grayscale in order to more quickly balance the temperature of the light emitting device corresponding to the test picture with the same grayscale.

[0067] For example, when testing a high grayscale screen, a low grayscale screen is inserted, and when testing a low grayscale screen, a high grayscale screen is inserted. For another example, when testing the 255th grayscale test screen, a temperature correction screen of the 0th grayscale is inserted in the time interval of the 255th grayscale test screen; when testing the 0th grayscale test screen, a temperature correction screen of the 255th grayscale is inserted in the time interval of the 0th grayscale test screen. In this way, the temperature of the light-emitting device of the test screen output again can be made substantially equal to the temperature of the light-emitting device of the test screen output last time more quickly, and the temperature of the light-emitting device of the test screens at different grayscales can be made substantially consistent more easily.

[0068] In one possible implementation, see Figure 3 The step of controlling the target display panel to output a temperature-corrected picture of a second grayscale level comprises:

[0069] S111: Based on the first grayscale level, determine the display pixel ratio of the temperature correction image of the second grayscale level; wherein the display pixel ratio is the ratio of the display pixels of the temperature correction image to the total pixels of the target display panel; the display pixel ratio is negatively correlated with the first grayscale level.

[0070] In this embodiment, if the total number of pixels corresponding to the target display panel is 100 and the number of pixels lit (displayed) is 40, the display pixel ratio of the temperature correction screen is 40%. The higher the display pixel ratio, the higher the overall temperature of the pixels (light-emitting devices) corresponding to the temperature correction screen. Therefore, the temperature of the light-emitting devices corresponding to the temperature correction screen can be changed by adjusting the display pixel ratio of the temperature correction screen. For example, the temperature of the light-emitting device corresponding to the temperature correction screen with a display pixel ratio of 60% at the 127th grayscale is higher than the temperature of the light-emitting device corresponding to the temperature correction screen with a display pixel ratio of 40% at the 127th grayscale.

[0071] The display pixel ratio of the temperature correction screen is negatively correlated with the first grayscale level, that is, the lower the first grayscale level, the higher the display pixel ratio of the temperature correction screen of the first grayscale level. The lower the first grayscale level, the lower the temperature of the light-emitting device corresponding to the test screen, and the higher the display pixel ratio of the temperature correction screen, the higher the temperature of the light-emitting device corresponding to the temperature correction screen. In this way, the temperature of the test screens with different first grayscale levels can be made more consistent, so by using this feature, the temperature matching process of the debugging can be simulated more flexibly.

[0072] S112: Based on the display pixel ratio, controlling the target display panel to output a temperature-corrected picture with a second grayscale.

[0073] In an embodiment, after determining the display pixel ratio of the second grayscale based on the first grayscale, the target display panel can be controlled to output the temperature correction picture of the second grayscale. For example, the first grayscale is the 255th grayscale, the second grayscale is the 100th grayscale, and the display pixel ratio of the temperature correction picture of the second grayscale is 10%. The temperature of the light-emitting device corresponding to the next test picture of the 255th grayscale is reduced by the two factors of the 100th grayscale and the display pixel ratio of 10%. In this way, the temperature of the light-emitting device corresponding to the test picture of the first grayscale can be more easily adjusted by the two factors of the second grayscale and the temperature correction picture.

[0074] In a possible implementation, the step of determining the display pixel ratio of the temperature correction picture of the second grayscale level based on the first grayscale level includes: determining the display pixel ratio of the temperature correction picture of the second grayscale level based on a preset value of the target display panel and the first grayscale level; the preset value is related to the usage scenario of the target display panel.

[0075] The preset value is a value pre-set for the target display panel, and the preset value is related to the actual usage scenario of the target display panel. For example, when the target display panel is used to watch a movie, the temperature correction picture with a relatively lower display pixel ratio can be selected, which is more in line with the display content with a low display pixel ratio. For another example, when the target display panel is used to play advertisements for a long time, the temperature correction picture with a relatively higher display pixel ratio can be selected, which is more in line with the video content with a high display pixel ratio. In this way, the display pixel ratio of the temperature correction picture can be set according to the actual application scenario of the target display panel, so that the display pixel ratio of the temperature correction picture has more practical application value.

[0076] In a possible implementation, the step of controlling the target display panel to output a temperature correction image of a second grayscale level includes: determining a duration of the temperature correction image of the second grayscale level based on the first grayscale level; the smaller the absolute value of the difference between the first grayscale level and the preset grayscale level, the shorter the duration.

[0077] The duration of the temperature correction screen is related to the first grayscale level, and the preset grayscale level is a preset grayscale level, which is usually the middle value of the total grayscale level, for example, the grayscale level is 0-255, the total grayscale level is 256, and the preset grayscale level is 128. In the 255th to 128th level, as the grayscale level decreases, the duration of the temperature correction screen gradually decreases; in the 127th to 0th level, as the grayscale level decreases, the duration of the temperature correction screen gradually increases.

[0078] When the first grayscale is a higher grayscale, the longer the time of the inserted temperature correction picture of the lower second grayscale is, the lower the temperature of the light-emitting device corresponding to the test picture of the first grayscale is reduced. When the first grayscale is a lower grayscale, the longer the time of the inserted temperature correction picture of the higher second grayscale is, the higher the temperature of the light-emitting device corresponding to the test picture of the first grayscale is increased. In this way, by introducing the duration of the temperature correction picture, the temperature correction picture can be assisted to more accurately control the temperature matching the test picture.

[0079] In one possible implementation, see Figure 4 , after the step of collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel according to the actual brightness, it also includes:

[0080] S13: Compare the actual brightness of the test picture of the first grayscale with the standard brightness of the first grayscale to determine the target brightness when the target display panel displays the test picture; wherein the standard brightness of the first grayscale is obtained by a target gamma curve.

[0081] After testing the actual brightness of a test picture of the first grayscale level, it is compared with the standard brightness corresponding to the first grayscale level of the target gamma curve. If the actual brightness of the test picture is significantly different from the standard brightness, the parameters of the register are adjusted to output the next test picture of the first grayscale level again, and the actual brightness of the test picture is collected again until the actual brightness of the test picture of the first grayscale level is closer to the standard brightness, and the register data of the register is stored. In this way, the target brightness of each of the first grayscale levels can be found more accurately based on the standard brightness of the target gamma curve, so that a more accurate gamma curve can be debugged.

[0082] In a possible implementation, the step of comparing the actual brightness of the test picture of the first grayscale level with the standard brightness of the first grayscale level to determine the target brightness when the target display panel displays the test picture includes: comparing the actual brightness of the test picture of the first grayscale level with a preset brightness threshold, and calculating the absolute value of the brightness difference between the actual brightness of the test picture of the first grayscale level and the standard brightness of the first grayscale level, and taking the actual brightness of the test picture with the smallest absolute value of the brightness difference and less than the preset brightness threshold as the target brightness when the target display panel displays the test picture.

[0083] The preset brightness threshold is a brightness range set in advance. Among the actual brightness of multiple test pictures of the same first grayscale, the actual brightness that is closest to the standard brightness of the target gamma curve is not necessarily the best target brightness under the first grayscale. It is possible that the actual brightness error of the test picture under the first grayscale is large. Therefore, not only the actual brightness that is closest to the standard brightness of the target gamma curve is selected, but also the actual brightness must be less than the preset brightness threshold, so that the actual brightness can be used as the target brightness of the test picture under the first grayscale. In this way, by increasing the preset brightness threshold, the selected target brightness can be made more accurate, so that a more accurate gamma curve can be further debugged.

[0084] In one possible implementation, see Figure 5 , the step of collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the first grayscale level according to the actual brightness, further includes:

[0085] S10: Control the target display panel to output a test picture of the Nth grayscale level.

[0086] S11: Controlling the target display panel to output a temperature correction picture of an Mth grayscale; the Nth grayscale is not equal to the Mth grayscale.

[0087] S14: Collecting the actual brightness of the target display panel when displaying the test screen, and adjusting the target register data value of the target display panel at the Nth grayscale level according to the actual brightness; wherein the Nth grayscale level is a grayscale level different from the first grayscale level; N and M are both natural numbers.

[0088] In this embodiment, the target register data value of the target display panel at the Nth grayscale level can be adjusted in sequence by the method in the above embodiment. For example, if the first grayscale level is the 100th grayscale level, then N can be the remaining grayscale levels of all the display panels except 100, and the maximum value of N is equal to the total grayscale level of the target display panel. In this way, the target register data values ​​of the target display panel at all grayscale levels can be adjusted in sequence.

[0089] Preferably, see Figure 6 , after the step of collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the Nth grayscale level according to the actual brightness, it also includes:

[0090] S15: determining a final gamma curve according to the target register data value of each grayscale level, and storing and testing the final gamma curve.

[0091] After adjusting the target register data values ​​of the target display panel at all grayscale levels, the final gamma curve of the target display panel can be obtained, and then the final gamma curve of the target display panel is stored and tested, so that the final gamma curve of the target display panel can be used more conveniently.

[0092] In summary, the present application can keep the temperature of the light-emitting device corresponding to the test pictures of the first grayscale level output at intervals basically unchanged by intermittently outputting the test pictures of the same first grayscale level and inserting a temperature correction picture of the second grayscale level different from the first grayscale level between the test pictures of the first grayscale level, thereby making the error between the gamma curve of the target display panel and the gamma curve during actual display smaller, thereby improving the display quality of the display panel.

[0093] In addition, the temperature of the light-emitting device corresponding to the test screen of the first grayscale can be balanced by three parameters, namely, the second grayscale, the display pixel ratio of the second grayscale, and the duration of the second grayscale. The temperature of the light-emitting device corresponding to the test screen of the first grayscale can be balanced by changing at least one of the above parameters, for example, the second grayscale can be changed alone, and the display pixel ratio of the second grayscale and the duration of the second grayscale remain unchanged, or the second grayscale, the display pixel ratio of the second grayscale and the duration of the second grayscale can be adjusted accordingly according to the first grayscale parameter. In this way, the above three parameters can not only more flexibly match the temperature of the test screen of the first grayscale, but also more efficiently balance the temperature of the light-emitting device corresponding to the test screen, so that the error between the gamma curve of the target display panel and the gamma curve during actual display can be further reduced, thereby further improving the display quality of the display panel.

[0094] This embodiment also provides an electronic device, which can be used to run or implement the gamma test method of the display panel provided in this embodiment. The electronic device may include a device with image processing capabilities, such as a server, a personal computer, a laptop computer, etc.

[0095] Please refer to Figure 7 , a schematic diagram of the electronic device 100, wherein the electronic device 100 includes a gamma test device 110 for a display panel, a machine-readable storage medium 120 and a processor 130.

[0096] The components of the machine-readable storage medium 120 and the processor 130 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The gamma test device 110 of the target display panel includes at least one software function module that can be stored in the machine-readable storage medium 120 in the form of software or firmware or solidified in the operating system (OS) of the electronic device 100. The processor 130 is used to execute the executable modules stored in the machine-readable storage medium 120, such as the software function modules and computer programs included in the gamma test device 110 of the target display panel.

[0097] The machine-readable storage medium 120 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), etc. The machine-readable storage medium 120 is used to store a program, and the processor 130 executes the program / executable gamma test method of the target display panel provided in this embodiment after receiving the execution instruction.

[0098] The processor 130 may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0099] In another embodiment, please refer to Figure 8 Based on the same inventive concept as the above-mentioned embodiment, the embodiment of the present application further provides a gamma test device 110 for a display panel, wherein the gamma test device 110 for a target display panel includes at least one functional module that can be stored in a machine-readable storage medium 120 in the form of software. Functionally, the device includes:

[0100] A first output module 111, used to control the target display panel to output a test picture with a first grayscale level;

[0101] A second output module 112, used for controlling the target display panel to output a temperature-corrected picture of a second grayscale; the first grayscale is not equal to the second grayscale;

[0102] The acquisition module 113 is used to acquire the actual brightness of the target display panel when displaying the test image, and adjust the target register data value of the target display panel at the first grayscale level according to the actual brightness, and the target register data value corresponds to the corresponding target voltage value and target brightness value.

[0103] It should be noted that each module in the gamma testing device 110 for the display panel in this embodiment corresponds one-to-one to each step in the gamma testing method for the display panel in the aforementioned embodiment. Therefore, the specific implementation method and technical effects achieved by this embodiment can refer to the implementation method of the gamma testing method for the display panel in the aforementioned embodiment, which will not be repeated here.

[0104] In a possible implementation, the present application further provides a machine-readable storage medium, the machine-readable storage medium storing machine executable instructions, the machine executable instructions when executed by one or more processors, implement the gamma test method of the display panel provided in the present application. The machine executable instructions can be in the form of a program, software, software module, script or code, written in any form of programming language (including compiled or interpreted language, or declarative or procedural language), and can be deployed in any form, including being deployed as an independent program or being deployed as a module, component, subroutine or other unit suitable for use in a computing environment.

[0105] As an example, the machine executable instructions may be deployed to be executed on one electronic device, or on multiple electronic devices located in one location, or on multiple electronic devices distributed in multiple locations and interconnected by a communication network.

[0106] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0107] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a multimedia terminal device (which can be a mobile phone, a computer, a television receiver, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0109] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A gamma test method for a display panel, characterized in that: The method comprises: Controlling the target display panel to output a test picture of a first grayscale level; Controlling the target display panel to output a temperature correction picture of a second grayscale level; the first grayscale level is not equal to the second grayscale level; The actual brightness of the target display panel when displaying the test image is collected, and the target register data value of the target display panel at the first grayscale level is adjusted according to the actual brightness, and the target register data value corresponds to the corresponding target voltage value and target brightness value.

2. The gamma test method for a display panel according to claim 1, characterized in that: Before the step of controlling the target display panel to output the temperature correction picture of the second grayscale level, the method further includes: Based on the first grayscale, a second grayscale is determined; wherein the higher the first grayscale is, the lower the second grayscale is.

3. The gamma test method for a display panel according to claim 1, characterized in that: The step of controlling the target display panel to output a temperature-corrected picture of a second grayscale level includes: Based on the first grayscale, determining the display pixel ratio of the temperature correction picture of the second grayscale; wherein the display pixel ratio is the ratio of the display pixels of the temperature correction picture to the total pixels of the target display panel; the display pixel ratio is negatively correlated with the first grayscale; Based on the display pixel ratio, controlling the target display panel to output a temperature-corrected picture with a second grayscale level; Preferably, the step of determining the display pixel ratio of the temperature correction picture of the second grayscale based on the first grayscale includes: Based on a preset value of the target display panel and the first grayscale, a display pixel ratio of the temperature correction picture of the second grayscale is determined; the preset value is related to a usage scenario of the target display panel.

4. The gamma test method for a display panel according to claim 1, characterized in that: The step of controlling the target display panel to output a temperature-corrected picture of a second grayscale level includes: Based on the first grayscale, the duration of the temperature correction picture of the second grayscale is determined; the smaller the absolute value of the difference between the first grayscale and the preset grayscale is, the shorter the duration is.

5. The gamma test method for a display panel according to claim 1, characterized in that: After the step of collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the first grayscale according to the actual brightness, the method further includes: The actual brightness of the test picture of the first grayscale is compared with the standard brightness of the first grayscale to determine the target brightness when the target display panel displays the test picture; wherein the standard brightness of the first grayscale is obtained by a target gamma curve.

6. The gamma test method for a display panel according to claim 5, characterized in that: The step of comparing the actual brightness of the test picture of the first grayscale with the standard brightness of the first grayscale to determine the target brightness when the target display panel displays the test picture includes: Compare the actual brightness of the test picture of the first grayscale level with the preset brightness threshold, and calculate the absolute value of the brightness difference between the actual brightness of the test picture of the first grayscale level and the standard brightness of the first grayscale level, and take the actual brightness of the test picture with the smallest absolute value of the brightness difference and less than the preset brightness threshold as the target brightness when the target display panel displays the test picture.

7. The gamma test method for a display panel according to claim 1, wherein the step of collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the first grayscale level according to the actual brightness, further comprises: Controlling the target display panel to output a test picture of the Nth grayscale level; Controlling the target display panel to output a temperature correction picture of the Mth grayscale level; The Nth grayscale number is not equal to the Mth grayscale number; Acquiring the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the Nth grayscale according to the actual brightness; wherein the Nth grayscale is a grayscale different from the first grayscale; and N and M are both natural numbers; Preferably, after the step of collecting the actual brightness of the target display panel when displaying the test picture, and adjusting the target register data value of the target display panel at the Nth grayscale according to the actual brightness, the method further includes: A final gamma curve is determined according to the target register data value of each gray scale, and the final gamma curve is stored and tested.

8. A gamma test device for a display panel, characterized in that: The device comprises: A first output module, used for controlling the target display panel to output a test picture of a first grayscale level; A second output module, used for controlling the target display panel to output a temperature-corrected picture of a second grayscale level; the first grayscale level is not equal to the second grayscale level; The acquisition module is used to acquire the actual brightness of the target display panel when displaying the test screen, and adjust the target register data value of the target display panel at the first grayscale level according to the actual brightness, and the target register data value corresponds to the corresponding target voltage value and target brightness value.

9. An electronic device, characterized in that: The method comprises a processor and a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions, and when the machine-executable instructions are executed by the processor, the method according to any one of claims 1 to 7 is implemented.

10. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores machine-executable instructions, and when the machine-executable instructions are executed by one or more processors, the method according to any one of claims 1 to 7 is implemented.

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