Display device, display panel, and gamma adjustment method and adjustment apparatus therefor

Abstract

The application discloses a display panel and a gamma debugging method and a gamma debugging device thereof. The gamma debugging method comprises the following steps: determining a target gray scale interval in which a to-be-displayed gray scale is located and a target subframe corresponding to the target gray scale interval based on the to-be-displayed gray scale; debugging the gamma of the target gray scale interval, which comprises the following steps: providing a gray scale interval data signal to a sub-pixel in other subframes except the target subframe, providing a data signal to the sub-pixel in the target subframe, debugging based on collected optical data, and obtaining a correction data signal. According to the technical scheme, one refresh cycle of the sub-pixel is divided into at least two subframes for gamma debugging, different subframes correspond to different gray scale intervals, and thus the target subframe can be determined in the multiple subframes based on the to-be-displayed gray scale, different display controls are respectively performed on the target subframe and other subframes except the target subframe, and the gamma debugging is more flexible.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of image display, and more particularly to a display panel, a gamma debugging method thereof and a gamma debugging device. BACKGROUND

[0002] In a display device, before a display panel is shipped, the luminance of each gray scale needs to be debugged according to a predetermined Gamma curve, so that the luminance of each gray scale of the display panel is consistent with the Gamma curve, thereby ensuring that the display panel can accurately display the details of different luminance in a displayed image.

[0003] In the prior art, when the display panel is debugged, the display luminance of the display panel is constant in the display period of one frame, and a single Gamma curve is used for debugging, so the debugging method is fixed and single. SUMMARY

[0004] Therefore, the present application provides a display panel, a gamma debugging method thereof and a gamma debugging device, and the solutions are as follows.

[0005] In a first aspect, the present application provides a gamma debugging method of a display panel, the display panel having a sub-pixel, one refresh period of the sub-pixel being divided into at least two sub-frames, different sub-frames corresponding to different gray scale intervals, and different gray scale intervals not overlapping, the gamma debugging method comprising:

[0006] determining, based on a to-be-displayed gray scale, a target gray scale interval in which the to-be-displayed gray scale is located and a target sub-frame corresponding to the target gray scale interval;

[0007] debugging the gamma of the target gray scale interval, including: providing a gray scale interval data signal to the sub-pixel in other sub-frames except the target sub-frame, providing a data signal to the sub-pixel in the target sub-frame, debugging based on collected optical data to obtain a correction data signal.

[0008] In the gamma debugging method provided by the present application, one refresh period of the sub-pixel is divided into at least two sub-frames for gamma debugging, different sub-frames correspond to different gray scale intervals, and based on a to-be-displayed gray scale, a target sub-frame can be determined in multiple sub-frames, different display controls are performed on the target sub-frame and other sub-frames except the target sub-frame, so that the gamma debugging is more flexible.

[0009] In a second aspect, the present application further provides a gamma debugging device of a display panel, and the gamma debugging method, the display panel has a pixel, and the pixel has a plurality of sub-pixels, and a refresh cycle of each sub-pixel is divided into at least two sub-frames, different sub-frames correspond to different gray scale intervals, and different gray scale intervals do not overlap, and the gamma debugging device comprises:

[0010] a determining module, configured to determine, based on a to-be-displayed gray scale, a target gray scale interval in which the to-be-displayed gray scale is located and a target sub-frame corresponding to the target gray scale interval;

[0011] a control module, configured to debug gamma of the target gray scale interval, including: providing a gray scale interval data signal to the sub-pixel in a sub-frame other than the target sub-frame, providing a data signal to the sub-pixel in the target sub-frame, debugging based on collected optical data, and obtaining a correction data signal.

[0012] The gamma debugging device provided by the present application can perform the gamma method, and can perform different display control on the target sub-frame and the sub-frame other than the target sub-frame when debugging the gamma of the display panel, so that the gamma debugging is more flexible.

[0013] In a third aspect, the present application further provides a display panel, which comprises:

[0014] a sub-pixel; a refresh cycle of the sub-pixel is divided into at least two sub-frames, different sub-frames correspond to different gray scale intervals, and different gray scale intervals do not overlap;

[0015] a controller, configured to determine, based on a to-be-displayed gray scale, a target gray scale interval in which the to-be-displayed gray scale is located and a target sub-frame corresponding to the target gray scale interval, and further configured to debug gamma of the target gray scale interval, including: providing a gray scale interval data signal to the sub-pixel in a sub-frame other than the target sub-frame, providing a data signal to the sub-pixel in the target sub-frame, debugging based on collected optical data, and obtaining a correction data signal.

[0016] In the display panel provided by the present application, a refresh cycle of the sub-pixel is divided into at least two sub-frames, different sub-frames correspond to different gray scale intervals, and different gray scale intervals do not overlap, and when displaying an image, different display control can be performed on the sub-pixel in the target sub-frame and the sub-frame other than the target sub-frame based on the determined target gray scale, so as to improve display quality.

[0017] In a fourth aspect, the present application further provides a display device comprising the display panel.

[0018] The display device provided by the embodiment has the display panel, and when image display is performed, different display control can be performed on the sub-pixels based on the determined target gray scale in the target sub-frame and other sub-frames other than the target sub-frame, so as to improve the display quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0020] The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the present specification, to be understood and read by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0021] Figure 1 A flowchart of a display panel gamma debugging method provided by the embodiment of the present application is shown in the figure;

[0022] Figure 2 A gamma curve provided by the embodiment of the present application is shown in the figure;

[0023] Figure 3 A flowchart of another display panel gamma debugging method provided by the embodiment of the present application is shown in the figure;

[0024] Figure 4 A flowchart of another display panel gamma debugging method provided by the embodiment of the present application is shown in the figure;

[0025] Figure 5 A gamma curve of a multi-subframe gamma debugging provided by the embodiment of the present application is shown in the figure;

[0026] Figure 6 A flowchart of another display panel gamma debugging method provided by the embodiment of the present application is shown in the figure;

[0027] Figure 7 A setting mode of each sub-frame in a refresh cycle provided by the embodiment of the present application is shown in the figure;

[0028] Figure 8 A current and brightness curve of a MicroLED before gamma debugging is shown in the figure;

[0029] Figure 9 The image shows the current and brightness curves of MicroLED after display data correction based on the gamma adjustment method provided in this application embodiment.

[0030] Figure 10 A flowchart illustrating another display panel gamma adjustment method provided in this application embodiment;

[0031] Figure 11 This is a schematic diagram of the structure of a gamma debugging device provided in an embodiment of this application;

[0032] Figure 12 This is a schematic diagram of another gamma debugging device provided in an embodiment of this application;

[0033] Figure 13 A schematic diagram of the structure of another gamma debugging device provided in the embodiments of this application;

[0034] Figures 14-17 A timing diagram of a gamma debugging device provided in an embodiment of this application;

[0035] Figure 18 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0036] Figure 19 This is a schematic diagram of a display device provided as an example of this application. Detailed Implementation

[0037] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] refer to Figure 1 , Figure 1 This is a flowchart illustrating a display panel gamma adjustment method provided in an embodiment of this application. The display panel has sub-pixels, and one refresh cycle of a sub-pixel is divided into at least two sub-frames. Different sub-frames correspond to different grayscale ranges, and the different grayscale ranges do not overlap. The gamma method includes:

[0040] Step S11: Based on the grayscale to be displayed, determine the target grayscale range where the grayscale to be displayed is located and the target subframe corresponding to the target grayscale range.

[0041] Once the subframes of the refresh cycle and their corresponding grayscale intervals are determined, the grayscale to be displayed is obtained. The grayscale interval where the grayscale to be displayed is located is the target grayscale, and the corresponding subframe is the target subframe.

[0042] Step S12: Adjust the gamma of the target grayscale range, including: providing grayscale range data signals to sub-pixels in sub-frames other than the target sub-frame, providing data signals to sub-pixels in the target sub-frame, and adjusting based on the acquired optical data to obtain a correction data signal.

[0043] refer to Figure 2 As shown, Figure 2 A gamma curve diagram provided in this application embodiment. Figure 2 The horizontal axis represents grayscale, the vertical axis represents brightness, the dashed curve represents the Gamma 2.4 curve, the dotted-dash curve represents the Gamma 2.2 curve, and the thick black solid line curve represents the test gamma curve based on the gamma adjustment method of this application. Figure 2 The image shows the coordinates of the gamma curves at gray levels of 24, 55, 207, and 255. Figure 2 It can be seen that the test gamma curve based on the gamma adjustment method of this application is located between the Gamma2.2 curve and the Gamma2.4 curve, which meets the gamma adjustment standard.

[0044] For subframes other than the target subframe, the grayscale range data signals provided to the sub-pixels are preset fixed data signals, and the sub-pixels display based on the corresponding grayscale range data signals. These fixed data signals include at least one of the first data signal, the second data signal, and the dark state data signal described below. The target subframe is adjusted based on the grayscale to be displayed to obtain a correction data signal.

[0045] In this application, different initial data signals correspond to different display grayscale levels when driving sub-pixels for display. Theoretically, driving sub-pixels for display based on the initial data signal should enable the sub-pixels to have the display brightness of the corresponding display grayscale level. However, due to factors such as panel manufacturing processes, the display brightness of sub-pixels deviates from the corresponding display grayscale level when driven based on the initial data signal. In the technical solution of this application, in the target sub-frame, the data signal provided to the sub-pixels is the initial data signal corresponding to the grayscale level to be displayed. Adjustments are made based on the optical data collected under the initial data signal to obtain a correction data signal.

[0046] The grayscale to be displayed is set to GSx, and the corresponding initial data signal is Vdata0. In the conventional Gamma adjustment method, one refresh cycle is one subframe. During the subpixel emission phase of a subframe, the subpixel is controlled to display based on the initial data signal Vdata0, and adjustments are made based on the optical data collected at this time to obtain the correction data signal Vdata1. When the display panel displays an image, if the grayscale to be displayed is GSx, the subpixel is controlled to display based on the correction data signal Vdata1 during the subpixel emission phase of the subframe.

[0047] In the gamma adjustment method of this application, in sub-frames other than the target sub-frame, each sub-frame drives the sub-pixels to display based on a set grayscale range data signal. In the target sub-frame, the sub-pixels are controlled to display based on the initial data signal Vdata0 corresponding to the grayscale to be displayed GSx, and adjustment is performed based on the optical data collected at this time to obtain the correction data signal Vdata1', making gamma adjustment more flexible. When the display panel displays an image, if the grayscale to be displayed is GSx, one refresh cycle is divided into multiple sub-frames. In sub-frames other than the target sub-frame, each sub-frame drives the sub-pixels to display based on a set grayscale range data signal. In the target sub-frame, the sub-pixels are controlled to display based on the correction data signal Vdata1'. This allows the display device to display an image, with one target sub-frame based on the correction data signal and the other sub-frames based on the set grayscale range data signal, making gamma adjustment more flexible.

[0048] In the gamma adjustment method provided in this application embodiment, a refresh cycle of a sub-pixel is divided into at least two sub-frames, with different sub-frames corresponding to different grayscale ranges. During image display, based on a determined target grayscale, different display controls can be applied to the sub-pixel in the target sub-frame and other sub-frames, making gamma adjustment more flexible. The overall display brightness of each sub-frame is the same as the display brightness based on the grayscale to be displayed throughout the entire refresh cycle.

[0049] refer to Figure 3 As shown, Figure 3 This is a flowchart illustrating another display panel gamma adjustment method provided in an embodiment of this application. The gamma adjustment method includes:

[0050] Step S21: Based on the grayscale to be displayed, determine the target grayscale range where the grayscale to be displayed is located and the target subframe corresponding to the target grayscale range. This step is the same as step S11 above.

[0051] Step S22: In at least one subframe other than the target subframe, provide a first data signal, a second data signal, or a dark state data signal to the sub-pixel; in the target subframe, provide a data signal to the sub-pixel, and perform debugging based on the acquired optical data to obtain a correction data signal.

[0052] The first data signal is the data signal corresponding to the larger endpoint gray level (right endpoint gray level) of the two endpoint gray levels of the corresponding gray level interval, and the second data signal is the data signal corresponding to a preset gray level between the two endpoint gray levels of the corresponding gray level interval. The preset gray level can be any gray level value between the gray level values ​​of the two endpoints of the corresponding gray level interval.

[0053] When a first data signal, a second data signal, or a dark state data signal is provided to a sub-pixel in at least one sub-frame other than the target sub-frame, at least one sub-frame can be set to a dark state within a refresh cycle. This allows the combined display brightness of all non-dark sub-frames to be greater than the combined display brightness of all sub-frames. Setting a dark sub-frame reduces the illumination time of the sub-pixel within a refresh cycle. Although the combined display brightness of all non-dark sub-frames is greater than the combined display brightness of all sub-frames, the operating voltage / current of the non-dark sub-frames remains within a safe operating range during low grayscale display. Therefore, reducing the illumination time of the sub-pixel within a refresh cycle can improve the lifespan of the display panel.

[0054] In step S12 above, providing grayscale range data signals to sub-pixels in sub-frames other than the target sub-frame includes: as described in step S22 above, providing a first data signal, a second data signal, or a dark state data signal to sub-pixels in at least one sub-frame other than the target sub-frame.

[0055] When a sub-pixel receives a dark-state data signal, it is in a non-display state, not illuminated. The dark-state data signal is a known data signal that causes the sub-pixel to be in a non-display state. Once the grayscale intervals corresponding to each sub-frame are determined, the grayscale levels at the two endpoints of each interval are known constants. The preset grayscale level is based on these known constants pre-set at the two endpoints. Therefore, the first data signal corresponding to the right endpoint grayscale and the second data signal corresponding to the preset grayscale level are both known data signals. Since the data signals are positively correlated with the corresponding grayscale level to be displayed, the second data signal at the preset grayscale level between the two endpoints is less than the first data signal at the right endpoint grayscale level.

[0056] As described above, once the grayscale range corresponding to each subframe is determined, the first data signal, the second data signal, and the dark state data signal are all known data signals. In subframes other than the target subframe, the first data signal, the second data signal, and the dark state data signal are used to control the subpixels to emit light, facilitating the control of the light emission display in subframes other than the target subframe. It is readily apparent that in this embodiment, all subframes other than the target subframe can be configured to control the subpixels to emit light based on the first data signal, or all can be configured to control the subpixels to emit light based on the second data signal, or some can be controlled by the first data signal while others are controlled by the second data signal.

[0057] In this embodiment of the application, the method for dividing one refresh cycle of a sub-pixel into at least two sub-frames includes: dividing the gray levels from 0 to 255 into gray level intervals from the first gray level interval to the nth gray level interval, wherein the gray level range of the i-th gray level interval is GS. i-1 To GS i Where n is a positive integer, i is a positive integer not greater than n, and GS i GS is a positive number in the grayscale range of 0 to 255. i-1 Smaller than GS i GS0 = 0, GS n =255; where a refresh cycle has subframes from the 1st to the nth, the timing of the (i-1)th subframe precedes that of the 1st subframe, and the 1st subframe corresponds to the 1st grayscale interval. In this method, the division of refresh cycle subframes and corresponding grayscale intervals is simple and facilitates subsequent light emission display control.

[0058] To ensure that each grayscale value from 0 to 255 lies within a corresponding grayscale interval, and based on the first data signal being the data signal of the right endpoint of the corresponding grayscale interval, the first grayscale interval is set as a closed interval, while the other grayscale intervals are left-open and right-closed intervals. The interval division method is not limited to the left-open and right-closed interval method described above; each grayscale interval can also be set as right-closed and left-open, as long as each grayscale value from 0 to 255 lies within a corresponding grayscale interval.

[0059] Based on the above-mentioned method for dividing subframes and corresponding grayscale intervals in the refresh cycle, when the grayscale to be displayed is in the j-th grayscale interval, j is a positive integer not greater than n. In one approach, the implementation of step S12 includes... Figure 4 Steps S32, S33 and S34.

[0060] refer to Figure 4 As shown, Figure 4 A flowchart illustrating another display panel gamma adjustment method provided in this application embodiment shows the gamma adjustment method including:

[0061] Step S31: Based on the grayscale to be displayed, determine the target grayscale range where the grayscale to be displayed is located and the target subframe corresponding to the target grayscale range. This step is the same as step S11 above.

[0062] As mentioned above, there are n subframes, which are numbered from the 1st to the nth subframe, and the target subframe is the jth subframe. Based on the value of j, the following steps S32, S33, or S34 are selected and executed.

[0063] Step S32: If j=1, in the first subframe, the subpixel is adjusted to obtain the corresponding correction data signal, and in the second to nth subframes, dark state data signals are provided for the subpixel.

[0064] Step S33: If 1 < j < n, in the p-th subframe, control the sub-pixel to emit light using the first data signal corresponding to the p-th subframe. In the j-th subframe, adjust the sub-pixel to obtain the corresponding correction data signal. In the subframes after the j-th subframe, provide the sub-pixel with a dark state data signal.

[0065] Step S34: If j = n, in the p-th subframe, control the sub-pixel to emit light using the first data signal corresponding to the p-th subframe, and in the j-th subframe, adjust the sub-pixel to obtain the corresponding correction data signal.

[0066] Where p is a positive integer less than j.

[0067] exist Figure 4 In the illustrated method, based on the timing of the determined target sub-frame, dark-state data signals or corresponding first data signals are provided to the sub-pixels in other sub-frames to control the sub-pixels to emit light. The dark-state data signals and the first data signals corresponding to each sub-frame are both known data signals, simplifying the light emission control method for sub-pixels in other sub-frames.

[0068] Based on the method of dividing the refresh cycle into multiple subframes as described above, if n=4, then the gray levels from 0 to 255 are divided into gray level intervals 1 to 4. The 1st subframe corresponds to the 1st gray level interval, which is [GS0, GS1]. The 2nd subframe corresponds to the 2nd gray level interval, which is (GS1, GS2). The 3rd subframe corresponds to the 3rd gray level interval, which is (GS2, GS3). The 4th subframe corresponds to the 4th gray level interval, which is (GS3, GS4). Where GS0=0 and GS4=255. The 1st gray level interval is a closed interval, and the 2nd to 4th gray level intervals are all left-open and right-closed intervals.

[0069] It should be noted that in this embodiment, n=4, one refresh cycle is divided into 4 subframes, and the grayscale 0-255 is divided into 4 grayscale intervals to illustrate the gamma debugging method provided in this embodiment. It is easy to see that the value of n can be set to any positive integer greater than 1 based on the requirements, and is not limited to the n=4 scheme provided in this embodiment.

[0070] based on Figure 4 As shown, when n=4, GS1=a, GS2=b, GS3=c, and GS4=d. Here, a, b, c, and d increase sequentially and are all positive integers not greater than 255. During multi-subframe gamma debugging in one refresh cycle, the gamma curve is as follows... Figure 5 As shown.

[0071] refer to Figure 5 As shown, Figure 5 This application provides a schematic diagram of a gamma curve for multi-subframe gamma tuning, as shown in the embodiments of the present application. Figure 5 From top to bottom, the graph shows the gamma curves of the first, second, third, and fourth subframes, as well as the integrated gamma curve of the four subframes. The horizontal axis represents grayscale, and the vertical axis represents brightness. The display brightness of the first data signal corresponding to the first to fourth grayscale intervals are L1, L2, L3, and L4, respectively. Simulation data shows that when n=4, controlling the light emission of the display panel based on the integrated gamma curve obtained in this application conforms to the gamma 2.2 color management standard.

[0072] Debugging status 1: If the grayscale to be displayed is... Figure 5 If the vertical dotted line (representing the grayscale to be displayed) is located in the first subframe, then the first subframe is the target subframe, and the corresponding first grayscale interval is the target grayscale interval; at this time, j=1, according to Figure 4 The gamma debugging method shown executes step S32. Figure 5 In the direction of the extended dotted line shown, the sub-pixel is adjusted in the first sub-frame to obtain the corresponding correction data signal, and dark state data signals are provided to the sub-pixel in the second to fourth sub-frames, so that the sub-pixel is in the dark state in these three sub-frames.

[0073] Debugging State 2: If the grayscale to be displayed is located in the 2nd subframe, then the 2nd subframe is the target subframe, and the corresponding 2nd grayscale interval is the target grayscale interval; at this time, j=2, according to Figure 4The gamma adjustment method shown executes step S33. In the first sub-frame, a corresponding first data signal is provided to the sub-pixel, so that the sub-pixel is displayed with brightness L1. In the second sub-frame, the sub-pixel is adjusted to obtain the corresponding correction data signal. In the third and fourth sub-frames, dark state data signals are provided to the sub-pixel, so that the sub-pixel is in the dark state in both sub-frames.

[0074] Debugging State 3: If the grayscale to be displayed is located in the 3rd subframe, then the 3rd subframe is the target subframe, and the corresponding 3rd grayscale interval is the target grayscale interval. At this time, j=3, according to... Figure 4 The gamma adjustment method shown also executes step S33; in the first and second sub-frames, the corresponding first data signals are provided to the sub-pixels respectively, so that the sub-pixels display brightness L1 and brightness L2 respectively; in the third sub-frame, the sub-pixels are adjusted to obtain the corresponding correction data signals; in the fourth sub-frame, dark state data signals are provided to the sub-pixels so that the sub-pixels are in the dark state.

[0075] Debugging State 4: If the grayscale to be displayed is located in the 4th subframe, then the 4th subframe is the target subframe, and the corresponding 4th grayscale interval is the target grayscale interval; at this time, j=4, according to Figure 4 The gamma adjustment method shown executes step S34: providing the corresponding first data signal to the sub-pixel in the first to third sub-frames respectively, so that the sub-pixel displays brightness L1, brightness L2 and brightness L3 respectively, and adjusting the sub-pixel in the fourth sub-frame to obtain the corresponding correction data signal.

[0076] Based on the above method of dividing subframes and corresponding grayscale intervals in the refresh cycle, when the grayscale to be displayed is in the j-th grayscale interval, j is a positive integer not greater than n. In another approach, the implementation of step S12 includes... Figure 6 Steps S42, S43 and S44.

[0077] refer to Figure 6 As shown, Figure 5 A flowchart illustrating another display panel gamma adjustment method provided in this application embodiment shows the gamma adjustment method including:

[0078] Step S41: Based on the grayscale to be displayed, determine the target grayscale range where the grayscale to be displayed is located and the target subframe corresponding to the target grayscale range. This step is the same as step S11 above.

[0079] Step S42: If j=1, in the first subframe, the subpixel is adjusted to obtain the corresponding correction data signal, and in the second to nth subframes, dark state data signals are provided for the subpixel.

[0080] Step S43: If 1 < j < n, in at least one subframe from the first subframe to the (j-1)th subframe, control the subpixel to emit light with the second data signal; in the jth subframe, adjust the subpixel to obtain the corresponding correction data signal; and in subframes after the jth subframe, provide the subpixel with a dark state data signal.

[0081] Step S44: If j = n, in at least one subframe from the 1st subframe to the (j-1)th subframe, control the sub-pixel to emit light using the second data signal, and in the jth subframe, adjust the sub-pixel to obtain the corresponding correction data signal.

[0082] exist Figure 6 In the illustrated method, based on the timing of the determined target sub-frame, dark-state data signals or corresponding second data signals are provided to the sub-pixels in other sub-frames to control the sub-pixels to emit light. The dark-state data signals and the corresponding second data signals for each sub-frame are both known data signals, simplifying the light emission control method for sub-pixels in other sub-frames.

[0083] Optionally, the preset grayscale value corresponding to the second data signal can be within a range of 0.8 mm, where M is a positive integer not greater than 255. M is the larger of the two endpoint grayscale values ​​of the grayscale interval corresponding to the second data signal, i.e., M is the right endpoint grayscale value of the grayscale interval corresponding to the preset grayscale value. Setting the preset grayscale value to within a range of 0.8 mm, and having a preset grayscale value closer to the right endpoint grayscale value of the grayscale interval, results in a higher display brightness if the sub-pixel is displayed based on the corresponding second data signal.

[0084] In this embodiment, providing a first data signal, a second data signal, or a dark-state data signal to a sub-pixel in at least one sub-frame other than the target sub-frame includes: in sub-frames before the target sub-frame, at least one sub-frame provides a first data signal to the sub-pixel. This can be done by providing the first data signal to all sub-frames before the target sub-frame, or by providing the first data signal to a portion of the sub-frames before the target sub-frame and a second data signal to another portion of the sub-frames before the target sub-frame; in sub-frames after the target sub-frame, a dark-state data signal is provided to the sub-pixel. If a refresh cycle includes sub-frames 1 to n, then sub-frame j is the target sub-frame, and 1 < j < n. For sub-frames 1 to j-1 before the target sub-frame, at least one sub-frame provides a first data signal to the sub-pixel, and controlling the sub-pixel to emit light based on the first data signal enables display at maximum brightness in the corresponding grayscale range. For sub-frames j+1 to n after the target sub-frame, controlling the sub-pixel to emit light based on the dark-state data signal enables the sub-pixel to be in a non-display dark state, reducing power consumption.

[0085] Optionally, all subframes preceding the target subframe can be configured to provide a first data signal to their respective subpixels. In this way, subframes preceding the target subframe are controlled for illumination display based on their corresponding first data signals, while subframes following the target subframe are in a non-displaying dark state based on dark-state data signals, facilitating timing control of the data signals during gamma adjustment. Alternatively, as described above, a first data signal can be provided to a subset of subframes preceding the target subframe, and a second data signal can be provided to another subset of subframes preceding the target subframe.

[0086] In other methods, at least one subframe outside the target subframe can be used to provide a first data signal, a second data signal, or a dark state data signal to the sub-pixel. This includes: in subframes before the target subframe, at least one subframe provides a second data signal to the sub-pixel. This method can provide the second data signal to all subframes before the target subframe, or provide the second data signal to a portion of the subframes before the target subframe and provide the first data signal to another portion of the subframes before the target subframe; in subframes after the target subframe, a dark state data signal is provided to the sub-pixel.

[0087] Based on the gamma tuning method provided in the embodiments of this application, for a subframe before the target subframe, the light emission display can be controlled by the first data signal or the second data signal as needed, which increases the flexibility of gamma tuning.

[0088] refer to Figure 7 As shown, Figure 7 This is a schematic diagram of the setting method of each subframe in a refresh cycle provided in an embodiment of this application. In the same refresh cycle, the time length of each subframe increases sequentially in time sequence. Figure 7 The example given is n=4.

[0089] The duration of each subframe is sequentially increased, resulting in shorter durations for earlier subframes. Correspondingly, the subframe durations for grayscale ranges closer to 0 grayscale are shorter. Gamma adjustment is performed based on this to ensure display quality at low grayscale levels. Shorter subframe durations also result in shorter data writing and emission phases within the subframe.

[0090] The shorter the duration of the subframe corresponding to a grayscale range closer to 0 grayscale, the shorter the duration of the first subframe. When displaying low grayscale, the grayscale to be displayed is located within the grayscale area corresponding to the first subframe. The first subframe is the target subframe and emits light, while other subframes do not emit light. Therefore, the shorter the duration of the first subframe, the shorter the time spent emitting light and the longer the time spent not emitting light in a refresh cycle. To ensure that the overall display brightness in a refresh cycle meets the display requirements, the driving circuit of the first subframe during the emitting phase needs to be larger to maximize the emitting brightness of the first subframe and meet the overall display brightness requirements for a refresh cycle. Since a subframe includes a data writing phase and an emitting phase, the duration of the first subframe cannot be too short to ensure that the data writing phase completes the writing of the data signal.

[0091] In this application, the technical solution involves controlling the display of multiple subframes within a single refresh cycle. The combined display brightness of all subframes within the same refresh cycle is the same as the display brightness of a single subframe within a single refresh cycle.

[0092] Based on the above, when this gamma adjustment method is used in MicroLED display panels, it can solve the problem of poor low-grayscale light emission display effect of MicroLED display panels.

[0093] refer to Figure 8 and Figure 9 As shown, Figure 8 The current and brightness curves of the MicroLED before gamma adjustment are shown. Figure 9 The image shows the current and brightness curves after correcting the display data of MicroLED using the gamma adjustment method provided in this application.

[0094] Depend on Figure 8 It can be seen that without gamma adjustment, when MicroLED performs low grayscale display (based on low current emission display), such as... Figure 8 As shown in the dashed box, the relationship between current and luminous intensity is not linear.

[0095] Depend on Figure 9 As shown, after correcting the display data of MicroLED using the gamma adjustment method provided in this application embodiment, the current and luminance of MicroLED are linearly related when displaying at low grayscale. This is because the scheme of multi-subframe display control in this application, where the grayscale range closer to 0 grayscale corresponds to a shorter subframe duration, increases the current during the luminous phase of low grayscale display. This allows the current and luminance of MicroLED to have a linear relationship after gamma adjustment, thereby improving the display quality of MicroLED at low grayscale.

[0096] In this embodiment, the sub-pixels in the display panel can be micro-LEDs, which are either MicroLEDs or MiniLEDs, and are therefore not limited to the implementation of MicroLEDs described above.

[0097] The duration of each subframe within a refresh cycle can be set based on requirements. Other methods divide a refresh cycle of a subpixel into at least two subframes. Dividing the refresh cycle into multiple subframes ensures that the duration of each subframe within the same refresh cycle is the same, facilitating the division of subframe duration within a single refresh cycle.

[0098] In this embodiment, the gray levels from 0 to 255 can be divided into at least two gray level intervals. Dividing the gray levels from 0 to 255 into multiple gray level intervals with each interval having the same length facilitates the division of gray level intervals.

[0099] The grayscale interval division method can be set according to the requirements. In other methods, the grayscale from 0 to 255 can also be divided into multiple grayscale intervals by uneven division. In this case, the interval length (the difference between the grayscale at the right end and the grayscale at the left end) of the grayscale intervals is not exactly the same.

[0100] As mentioned above, the gray levels from 0 to 255 are divided into gray level intervals from the first gray level interval to the nth gray level interval. The gray level range of the i-th gray level interval is GS. i-1 To GS i Where n is a positive integer, i is a positive integer not greater than n, and GS i GS is a positive number in the grayscale range of 0 to 255. i-1 Smaller than GS i GS0 = 0, GS n =255. The midpoint of the p-th gray level interval and GS n / 2 has the first difference, and the midpoint of the q-th gray level interval is equal to GS. n / 2 has a second difference, p≠q, and both p and q are positive integers not greater than n; the absolute value of the first difference is greater than the absolute value of the second difference, and the difference between the gray levels at the two endpoints of the p-th gray level interval is less than the difference between the gray levels at the two endpoints of the q-th gray level interval. Thus, from 0 to GS... n The grayscale range between / 2 gray levels, the closer to 0 gray level, the smaller the range length. (In GS) n / 2 to GS n The grayscale range between grayscale levels, closer to GS n The smaller the interval length of the grayscale range, the better.

[0101] In other words, the width of the grayscale range is smaller in both the low and high grayscale ranges. The current required for low grayscale display is lower, while the current required for high grayscale display is higher. For micro-LEDs, operating at either high or low current can easily lead to display abnormalities. In this embodiment, the smaller width of the grayscale range allows for more precise gamma adjustment in both low and high grayscale displays, resulting in better display performance in both ranges.

[0102] Optionally, when n=4, the first grayscale interval can be set to [0, 24], the second grayscale interval to (24, 55], the third grayscale interval to (55, 207], and the fourth grayscale interval to (207, 255). That is, the values ​​of a, b, c, and d are 24, 55, 207, and 255 respectively.

[0103] For display panels with micro-LEDs, as described above, after gamma adjustment of the display panel using the technical solution of this application, not only can the current and brightness of the micro-LEDs meet the linear relationship when displaying low grayscale, but the micro-LEDs can also have a relatively fine gamma adjustment accuracy in both low and high grayscale ranges, thereby improving the display quality in both low and high grayscale ranges.

[0104] refer to Figure 10 As shown, Figure 10 This is a flowchart illustrating another display panel gamma adjustment method provided in an embodiment of this application. Figure 1 Based on the method shown, Figure 10 The gamma debugging method shown includes the following steps before step S11:

[0105] Step S10: Based on the acquired instructions, divide one refresh cycle of a sub-pixel into at least two sub-frames, with different sub-frames corresponding to different grayscale ranges.

[0106] exist Figure 10 In the method shown, when adjusting the gamma of the display panel, the settings of the subframes and their corresponding grayscale ranges in the refresh cycle can be configured according to requirements. In other methods, gamma adjustment can also be performed directly based on the settings of the subframes and their corresponding grayscale ranges in a fixed refresh cycle.

[0107] As described above, the gamma adjustment method provided in this application can achieve multi-subframe gamma adjustment of the display panel. Each subframe can have slightly different display control methods, and the gamma adjustment of different subframes takes into account the gamma adjustment of other subframes. This ensures that the overall display brightness after gamma adjustment of multiple subframes is the same as the display brightness after single gamma adjustment using the grayscale level to be displayed in one refresh cycle. Furthermore, each subframe can have slightly different display control based on its corresponding grayscale range, making gamma adjustment more flexible and diverse, thus improving display quality.

[0108] Based on the above embodiments, another embodiment of this application provides a gamma adjustment device for a display panel, which is capable of executing the above-described gamma adjustment method. As described above, the display panel has pixels, characterized in that a refresh cycle of a sub-pixel is divided into at least two sub-frames, different sub-frames correspond to different grayscale intervals, and different grayscale intervals do not overlap. The structure of the gamma adjustment device can be as follows: Figure 11 As shown.

[0109] refer to Figure 11 As shown, Figure 11 This application provides a schematic diagram of the structure of a gamma debugging device, which includes:

[0110] The determining module 11 is used to determine the target grayscale range where the grayscale to be displayed is located and the target subframe corresponding to the target grayscale range based on the grayscale to be displayed.

[0111] The control module 12 is used to adjust the gamma of the target grayscale range, including: providing grayscale range data signals to sub-pixels in other sub-frames outside the target sub-frame, providing data signals to sub-pixels in the target sub-frame, and adjusting based on the acquired optical data to obtain a correction data signal.

[0112] The gamma debugging device provided in this application embodiment can implement the above-mentioned gamma debugging method, making gamma debugging more flexible and diverse, and improving display quality.

[0113] refer to Figure 12 As shown, Figure 12 This is a schematic diagram of another gamma debugging device provided in an embodiment of this application. Figure 11 Based on the method shown, Figure 12 The gamma debugging device shown also includes a division module 13, which is used to divide a refresh cycle of a sub-pixel into at least two sub-frames based on the acquired instructions, with different sub-frames corresponding to different grayscale ranges.

[0114] pass Figure 12 The gamma debugging device shown can also be configured to divide the subframes and corresponding grayscale ranges in the refresh cycle according to requirements.

[0115] refer to Figure 13 As shown, Figure 13 This is a schematic diagram of the structure of another gamma debugging device provided in the embodiments of this application. Figure 11 Based on the method shown, Figure 13 The gamma debugging device also includes multiple independent storage modules 14, each corresponding to a grayscale interval, used to store the gamma data of the corresponding grayscale interval. During gamma debugging, based on the gamma data stored in the storage modules 14, grayscale interval data signals are provided to the corresponding subframe. The storage modules 14 can also store correction data acquired when the corresponding grayscale interval is used as the target grayscale interval.

[0116] Figure 13 The method shown is in Figure 11 The storage module 14 is set up in the manner shown, which obviously can also be used in... Figure 12 Storage module 14 is set up based on the method shown.

[0117] Taking a refresh cycle consisting of 4 subframes as an example, these 4 subframes are subframe 1 to subframe 4, corresponding to the 1st to 4th grayscale ranges respectively. The 1st to 4th grayscale ranges can be represented as follows: Figure 5 As shown, the grayscale values ​​are divided based on four grayscale values: 0, a, b, c, and d, where 0 < a < b < c < d = 255. The first to fourth grayscale intervals correspond to the first storage module 141, the second storage module 142, the third storage module 143, and the fourth storage module 144, respectively. The timing of the first to fourth subframes is controlled based on the subframe control signal. At this time, the timing corresponding to the above-mentioned debugging states 1, 2, 3, and 4 is as shown in Figure 11-. Figure 17 As shown.

[0118] refer to Figures 14-17 As shown, Figures 14-17 This is a timing diagram of a gamma debugging device provided in an embodiment of this application. The first storage module 141, the second storage module 142, the third storage module 143, and the fourth storage module 144 are four separate storage modules 14, used to store gamma data for corresponding subframes and grayscale ranges. These four storage modules 14 do not affect each other. The durations of the first to fourth subframes can be the same or different. Figures 14-17The illustrated method uses the example of increasing duration from subframe 1 to subframe 4. One refresh cycle includes the timing sequence of subframe 1 → subframe 2 → subframe 3 → subframe 4. During gamma adjustment, the display status is cyclically adjusted using the sequence of subframe 1 → subframe 2 → subframe 3 → subframe 4.

[0119] like Figure 14 As shown, in debugging state 1: the first subframe is the target subframe, and the first grayscale range is grayscale 0 to a. In the second to fourth subframes, fixed dark-state data signals are input based on the second storage module 142 to the fourth storage module 144, respectively. Corresponding grayscale optical data is acquired, adjusted to the required brightness, and the corresponding correction data signal is obtained.

[0120] like Figure 15 As shown, in debugging state 2: the second subframe is the target subframe, and the second grayscale range is grayscale a to b. In the first subframe, based on the first data signal input to the first storage module 141, which is fixedly set to the data signal corresponding to grayscale a, the brightness data of grayscale a is displayed in the first subframe. In the third and fourth subframes, fixed dark-state data signals are input based on the third storage module 143 and the fourth storage module 144, respectively. Corresponding grayscale optical data is acquired, adjusted to the required brightness, and the corresponding correction data signal is obtained.

[0121] like Figure 16 As shown, in debugging state 3: the third subframe is the target subframe, and the third grayscale range is grayscale b to c. In the first and second subframes, the corresponding first data signals are input based on the first storage module 141 and the second storage module 142, respectively. The first storage module 141 is fixedly set to use the data signal corresponding to grayscale a as the first data signal, and the second storage module 142 is fixedly set to use the data signal corresponding to grayscale b as the first data signal. Therefore, the brightness data of grayscale a is displayed in the first subframe, and the brightness data of grayscale b is displayed in the second subframe. In the fourth subframe, a fixed dark state data signal is input based on the fourth storage module 144. The corresponding grayscale optical data is collected, adjusted to the required brightness, and the corresponding correction data signal is obtained.

[0122] like Figure 17As shown, in debugging state 4: the 4th subframe is the target subframe, and the 4th grayscale range is grayscale c to 255. From the 1st to the 3rd subframe, the corresponding first data signals are input from the 1st storage module 141, the 2nd storage module 142, and the 3rd storage module 143, respectively. The 1st storage module 141 is fixedly set to use the data signal corresponding to grayscale a as the first data signal, the 2nd storage module 142 is fixedly set to use the data signal corresponding to grayscale b as the first data signal, and the 3rd storage module 143 is fixedly set to use the data signal corresponding to grayscale c as the first data signal. Therefore, the brightness data of grayscale a is displayed in the 1st subframe, the brightness data of grayscale b is displayed in the 2nd subframe, and the brightness data of grayscale c is displayed in the 3rd subframe. Corresponding grayscale optical data is acquired, adjusted to the required brightness, and the corresponding correction data signal is obtained.

[0123] exist Figures 14-17 In the illustrated method, when adjusting the second subframe, the display grayscale of the first subframe can be selected from 0 to a based on the debugging effect. It is not limited to displaying the brightness data of grayscale a based on the corresponding first data signal. As described in the above embodiment, it can also be based on the second data signal to display a preset grayscale between 0 and a. Similarly, when adjusting the third subframe, the display grayscale of the first and second subframes can be selected from 0 to a and a to b respectively based on the debugging effect. When adjusting the fourth subframe, the display grayscale of the first, second, and third subframes can be selected from 0 to a, a to b, and b to c respectively based on the debugging effect.

[0124] In other methods, when adjusting the second subframe, the grayscale of the first subframe can be changed based on the adjustment effect, instead of fixedly displaying grayscale 'a' or a preset grayscale value between 0 and 'a'. Similarly, when adjusting the third subframe, the brightness of the first and second subframes can be changed based on the adjustment effect, instead of displaying fixed brightness values; and when adjusting the fourth subframe, the brightness of the first to third subframes can be changed based on the adjustment effect, instead of displaying fixed brightness values.

[0125] Based on the above embodiments, another embodiment of this application also provides a display panel, such as... Figure 18 As shown.

[0126] refer to Figure 18 As shown, Figure 18 This application provides a schematic diagram of the structure of a display panel, which includes:

[0127] Sub-pixel 21; One refresh cycle of sub-pixel 21 is divided into at least two sub-frames, with different sub-frames corresponding to different grayscale ranges, and the different grayscale ranges do not overlap.

[0128] Controller 22 is used to determine the target display grayscale based on the grayscale to be displayed, provide grayscale interval data signals to sub-pixels 21 in sub-frames other than the target sub-frame, and provide correction data signals to sub-pixels in the target sub-frame. The correction data signals can be determined based on the gamma adjustment method / gamma adjustment device described in the above embodiments.

[0129] The controller 22 can be connected to the sub-pixel 21 via a pixel circuit to control the sub-pixel 21 to emit light for display. The controller 22 can be an IC.

[0130] As described above, in this embodiment, the sub-pixel is a micro-LED, which can be either MiniLED or MicroLED. The display panel can control the sub-pixel 21 to perform multi-sub-frame display. In sub-frames other than the target sub-frame, grayscale range data signals are provided to the sub-pixel 21. In the target sub-frame, the sub-pixel 21 is provided with the correction data signal determined by the gamma adjustment method / gamma adjustment device described above, which can solve the problem of poor low-grayscale light emission display effect of microLED.

[0131] Based on the above embodiments, another embodiment of this application also provides a display device, which is as follows: Figure 19 As shown.

[0132] refer to Figure 19 As shown, Figure 19 This is a schematic diagram of a display device provided as an example of this application. The display device includes a display panel 41, which is the display panel provided in the above embodiment. The display device can be an electronic device such as a mobile phone, tablet computer, in-vehicle display device, or wearable device with display function. The specific implementation and application field of the display device in this application embodiment are not limited.

[0133] The display device uses the display panel provided in the above embodiment, which can control the sub-pixel 21 to perform multi-sub-frame display. In other sub-frames besides the target sub-frame, grayscale range data signals are provided to the sub-pixel 21. In the target sub-frame, the correction data signal determined by the gamma adjustment method / gamma adjustment device in the above embodiment is provided to the sub-pixel 21. This can solve the problem of poor low grayscale light emission display effect of micro LEDs.

[0134] The various embodiments in this specification are described in a progressive, parallel, or combined manner. Each embodiment focuses on its differences from other embodiments, and similar or identical parts between embodiments can be referred to interchangeably. For the gamma debugging device, display panel, and display apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and relevant parts can be referred to the relevant sections of the gamma debugging method description.

[0135] It should be noted that, in the description of this application, the accompanying drawings and embodiments are illustrative rather than restrictive. The same reference numerals throughout the embodiments identify the same structures. Additionally, for ease of understanding and description, the thicknesses of some layers, films, panels, regions, etc., may be exaggerated in the drawings. It is also understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element may be directly on the other element or there may be intermediate elements. Furthermore, "on" means positioning an element on or below another element, but does not inherently mean positioning it above another element according to the direction of gravity.

[0136] The terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the middle.

[0137] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0138] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for adjusting the gamma of a display panel, the display panel having sub-pixels, characterized in that, One refresh cycle of the sub-pixel is divided into at least two sub-frames, different sub-frames correspond to different grayscale intervals, and different grayscale intervals do not overlap. The gamma adjustment method includes: Based on the grayscale to be displayed, determine the target grayscale range where the grayscale to be displayed is located and the target subframe corresponding to the target grayscale range; Adjusting the gamma of the target grayscale range includes: providing grayscale range data signals to the sub-pixels in other sub-frames outside the target sub-frame, wherein the grayscale range signals are preset fixed data signals; providing data signals to the sub-pixels in the target sub-frame, and adjusting based on the acquired optical data to obtain a correction data signal; wherein the fixed data signal includes at least one of a first data signal, a second data signal, and a dark state data signal; Wherein, the first data signal is the data signal corresponding to the larger endpoint gray level among the two endpoint gray levels of the corresponding gray level interval, and the second data signal is the data signal corresponding to the preset gray level between the two endpoint gray levels of the corresponding gray level interval. In the subframe preceding the target subframe, at least one of the subframes provides the first data signal to the sub-pixel; In the subframe following the target subframe, dark state data signals are provided to the sub-pixel.

2. The gamma tuning method according to claim 1, characterized in that, Methods for dividing one refresh cycle of the sub-pixel into at least two subframes include: Divide the gray levels from 0 to 255 into gray level intervals from the first gray level to the nth gray level interval. The gray level range of the i-th gray level interval is GS. i-1 To GS i Where n is a positive integer, i is a positive integer not greater than n, and GS i GS is a positive number in the grayscale range of 0 to 255. i-1 Smaller than GS i GS0=0, GS n =255; In one of the refresh cycles, there are subframes from the first to the nth, the timing of the (i-1)th subframe precedes that of the i-th subframe, and the i-th subframe corresponds to the i-th grayscale interval.

3. The gamma tuning method according to claim 2, characterized in that, When the grayscale to be displayed is in the j-th grayscale interval, where j is a positive integer not greater than n, grayscale interval data signals are provided to the sub-pixel in other sub-frames outside the target sub-frame, and data signals are provided to the sub-pixel in the target sub-frame. Adjustments are performed based on the acquired optical data to obtain correction data signals, including: If j=1, in the first subframe, the sub-pixel is adjusted to obtain the corresponding correction data signal, and in the second to nth subframes, the sub-pixel is provided with a dark state data signal. If 1 < j < n, in the p-th subframe, the sub-pixel is controlled to emit light using the first data signal corresponding to the p-th subframe. In the j-th subframe, the sub-pixel is adjusted to obtain the corresponding correction data signal. In all subframes after the j-th subframe, a dark state data signal is provided for the sub-pixel. If j=n, in the p-th subframe, the sub-pixel is controlled to emit light using the first data signal corresponding to the p-th subframe, and in the j-th subframe, the sub-pixel is adjusted to obtain the corresponding correction data signal; Where p is a positive integer less than j.

4. The gamma tuning method according to claim 2, characterized in that, When the grayscale to be displayed is in the j-th grayscale interval, where j is a positive integer not greater than n, grayscale interval data signals are provided to the sub-pixel in other sub-frames outside the target sub-frame, and data signals are provided to the sub-pixel in the target sub-frame. Adjustments are performed based on the acquired optical data to obtain correction data signals, including: If j=1, in the first subframe, the sub-pixel is adjusted to obtain the corresponding correction data signal, and in the second to nth subframes, the sub-pixel is provided with a dark state data signal. If 1 < j < n, in at least one subframe from the first subframe to the (j-1)th subframe, the second data signal is used to control the sub-pixel to emit light. In the jth subframe, the sub-pixel is adjusted to obtain the corresponding correction data signal. In all subframes after the jth subframe, a dark state data signal is provided for the sub-pixel. If j=n, in at least one subframe from the 1st subframe to the (j-1)th subframe, the second data signal is used to control the sub-pixel to emit light and display light. In the jth subframe, the sub-pixel is adjusted to obtain the corresponding correction data signal.

5. The gamma tuning method according to claim 1, characterized in that, The preset gray level is 0.8 mm in range, M is a positive integer not greater than 255, and M is the larger gray level among the two endpoint gray levels of the gray level interval corresponding to the second data signal.

6. The gamma tuning method according to claim 1, characterized in that, The first data signal is provided to the sub-pixel in all sub-frames preceding the target sub-frame.

7. The gamma tuning method according to claim 1, characterized in that, In the subframe preceding the target subframe, at least one of the subframes provides the second data signal to the sub-pixel; In the subframe following the target subframe, dark state data signals are provided to the sub-pixel.

8. The gamma tuning method according to claim 1, characterized in that, Within the same refresh cycle, the duration of each subframe increases sequentially in time.

9. The gamma tuning method according to claim 1, characterized in that, Each refresh cycle of the sub-pixel is divided into at least two sub-frames.

10. The gamma tuning method according to claim 1, characterized in that, The gray levels from 0 to 255 are each divided into at least two gray level intervals.

11. The gamma tuning method according to claim 1, characterized in that, Divide the gray levels from 0 to 255 into gray level intervals from the first gray level to the nth gray level interval. The gray level range of the i-th gray level interval is GS. i-1 To GS i Where n is a positive integer, i is a positive integer not greater than n, and GS i GS is a positive number in the grayscale range of 0 to 255. i-1 Smaller than GS i GS0=0, GS n =255; The midpoint of the p-th gray level interval and GS n / 2 has the first difference, and the midpoint of the q-th gray level interval is equal to GS. n / 2 has a second difference, p≠q, and p and q are both positive integers not greater than n; the absolute value of the first difference is greater than the absolute value of the second difference, and the difference between the gray levels at the two endpoints of the p-th gray level interval is less than the difference between the gray levels at the two endpoints of the q-th gray level interval.

12. The gamma adjustment method according to any one of claims 1-11, characterized in that, Also includes: Based on the acquired instructions, one refresh cycle of the sub-pixel is divided into at least two sub-frames, with different sub-frames corresponding to different grayscale ranges.

13. A gamma adjustment device for a display panel, used in the gamma adjustment method as described in any one of claims 1-12, wherein the display panel has pixels, characterized in that, One refresh cycle of the sub-pixel is divided into at least two sub-frames, with different sub-frames corresponding to different grayscale intervals. These different grayscale intervals do not overlap. The gamma adjustment device includes: The determining module is used to determine the target grayscale range where the grayscale to be displayed is located and the target subframe corresponding to the target grayscale range based on the grayscale to be displayed. The control module is used to adjust the gamma of the target grayscale range, including: providing grayscale range data signals to the sub-pixels in other sub-frames outside the target sub-frame; providing data signals to the sub-pixels in the target sub-frame; and adjusting based on the acquired optical data to obtain a correction data signal.

14. The debugging device according to claim 13, characterized in that, Also includes: The segmentation module is used to divide one refresh cycle of the sub-pixel into at least two sub-frames based on the acquired instructions, with different sub-frames corresponding to different grayscale ranges.

15. The debugging equipment according to claim 13, characterized in that, Multiple independent storage modules, each corresponding to a grayscale interval, are used to store the gamma data of the corresponding grayscale interval.

16. A display panel, characterized in that, The display panel includes: Sub-pixel; one refresh cycle of the sub-pixel is divided into at least two sub-frames, different sub-frames correspond to different grayscale intervals, and different grayscale intervals do not overlap; The controller is configured to determine a target display grayscale based on the grayscale to be displayed, and to provide grayscale interval data signals to the sub-pixels in other sub-frames outside the target sub-frame corresponding to the target display grayscale, wherein the grayscale interval signals are preset fixed data signals; and to provide correction data signals to the sub-pixels in the target sub-frame; wherein the fixed data signals include at least one of a first data signal, a second data signal, and a dark state data signal. Wherein, the first data signal is the data signal corresponding to the larger endpoint gray level among the two endpoint gray levels of the corresponding gray level interval, and the second data signal is the data signal corresponding to the preset gray level between the two endpoint gray levels of the corresponding gray level interval. In the subframe preceding the target subframe, at least one of the subframes provides the first data signal to the sub-pixel; In the subframe following the target subframe, dark state data signals are provided to the sub-pixel.

17. The display panel according to claim 16, characterized in that, The sub-pixel is a micro LED.

18. A display device, characterized in that, Includes the display panel as described in claim 16 or 17.

Images