Debugging method of display panel and control chip

Abstract

The application discloses a display panel debugging method and a control chip. A first gamma voltage corresponding to a binding point of an extreme gray scale of a display panel is obtained, a second gamma voltage corresponding to a binding point of a secondary gray scale adjacent to the extreme gray scale is obtained, the gamma voltage corresponding to the binding point of the secondary gray scale is adjusted according to the first gamma voltage and the second gamma voltage, a target gamma voltage of the binding point of the secondary gray scale is obtained, and the extreme gray scale in a preset gray scale-ACC lookup table of the display panel is adjusted, so that the brightness of the secondary gray scale in the gray scale-ACC lookup table reaches a target brightness, the brightness penetration of the extreme gray scale is realized, the gray scales in the preset gray scale-ACC lookup table are adjusted according to the penetration effect, the gamma voltage between the binding points corresponding to the extreme gray scale is debugged, the OD LUT has a debugging space for the table of the extreme gray scale, and the response time of the pixels of the display panel is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display panels, in particular to a display panel debugging method and a control chip. BACKGROUND

[0002] In the display panel driving process, due to the slow response time of liquid crystal, the change speed of liquid crystal capacitance cannot keep up with the change speed of external voltage due to the inertia of liquid crystal molecules, and it is difficult to reach the expected deflection angle within a frame, so that the display brightness cannot reach the expected value, and the dynamic picture appears to be trailing, which affects the display effect.

[0003] In the prior art, over drive (OD) technology is used for gray scale compensation, so that the liquid crystal can reach the expected deflection target in a short time. However, due to the over drive lookup table (OD LUT) setting, as shown in the following table, the maximum value is 1023 (10bit) and the minimum value is 0, so that the OD LUT related to the gray scale L255 and L0 cannot give a larger or smaller value, and generally cannot be debugged by default, which limits the debugging space of the OD LUT in the response time (ton-toff) region, so that the response time cannot be adjusted, affecting the display effect of the display panel. Figure 1 SUMMARY

[0004] The embodiments of the present application provide a display panel debugging method and a control chip to solve the technical problem of limited debugging space caused by the defects of the existing OD LUT.

[0005] The embodiments of the present application provide a display panel debugging method, which comprises:

[0006] obtaining a first gamma voltage corresponding to a first binding point, the first binding point being a binding point of an extreme gray scale of the display panel;

[0007] obtaining a second gamma voltage corresponding to a second binding point, the second binding point being a binding point of a secondary gray scale of the display panel, the secondary gray scale being a gray scale adjacent to the extreme gray scale in a preset display gray scale table;

[0008] adjusting the gamma voltage corresponding to the second binding point according to the first gamma voltage and the second gamma voltage to obtain a target gamma voltage of the second binding point;

[0009] adjusting the extreme gray scale in the preset gray scale-ACC lookup table of the display panel to make the brightness of the secondary gray scale in the gray scale-ACC lookup table reach a target brightness, the target brightness being the brightness of the extreme gray scale. ​

[0010] In some embodiments of the present application, the extreme gray scale includes a maximum gray scale of the display panel, the first knot includes a knot of the maximum gray scale of the display panel, the first gamma voltage includes a gamma voltage of the knot of the maximum gray scale, the second knot includes a neighboring knot of the maximum gray scale of the display panel, and the second gamma voltage includes a gamma voltage of the neighboring knot of the maximum gray scale.

[0011] In some embodiments of the present application, the adjusting the gamma voltage corresponding to the second knot according to the first gamma voltage and the second gamma voltage to obtain a target gamma voltage of the second knot includes:

[0012] adjusting the gamma voltage of the neighboring knot of the maximum gray scale to the gamma voltage of the knot of the maximum gray scale to obtain a target gamma voltage of the neighboring knot of the maximum gray scale.

[0013] In some embodiments of the present application, the adjusting the extreme gray scale in the gray scale-ACC correspondence table preset for the display panel to make the sub-value gray scale in the gray scale-ACC correspondence table reach a target brightness includes:

[0014] cutting the maximum gray scale in the gray scale-ACC correspondence table preset for the display panel to adjust a gray scale value of the maximum gray scale in the gray scale-ACC correspondence table to a gray scale value of the sub-value gray scale corresponding to the maximum gray scale, so that the sub-value gray scale in the gray scale-ACC correspondence table reaches a target brightness.

[0015] In some embodiments of the present application, the extreme gray scale includes a minimum gray scale of the display panel, the second knot includes a knot of the minimum gray scale of the display panel, the second gamma voltage includes a gamma voltage of the knot of the minimum gray scale, the first knot includes a neighboring knot of the minimum gray scale of the display panel, and the first gamma voltage includes a gamma voltage of the neighboring knot of the minimum gray scale.

[0016] In some embodiments of the present application, the adjusting the gamma voltage corresponding to the second knot according to the first gamma voltage and the second gamma voltage to obtain a target gamma voltage of the second knot includes:

[0017] adjusting the gamma voltage of the neighboring knot of the minimum gray scale to the gamma voltage of the knot of the minimum gray scale to obtain a target gamma voltage of the neighboring knot of the minimum gray scale.

[0018] In some embodiments of the present application, the adjusting the extreme gray scale in the gray scale-ACC correspondence table preset for the display panel to make the sub-value gray scale in the gray scale-ACC correspondence table reach a target brightness includes:

[0019] adjusting a gray scale value of the minimum gray scale in the gray scale-ACC correspondence table to a gray scale value of the next-value gray scale corresponding to the minimum gray scale, so that the next-value gray scale in the gray scale-ACC correspondence table reaches a target brightness.

[0020] In some embodiments of the present application, each of the first binding points corresponds to a first binding point value, and each of the second binding points corresponds to a second binding point value.

[0021] adjusting, according to the first gamma voltage and the second gamma voltage, a gamma voltage corresponding to the second binding point to obtain a target gamma voltage of the second binding point, includes:

[0022] determining a plurality of binding point pairs, and each of the binding point pairs includes a first binding point and a second binding point, and an absolute value of a difference between a binding point value of the first binding point and a binding point value of the second binding point is 1.

[0023] adjusting, to a gamma voltage of the first binding point, a gamma voltage of the second binding point in each of the binding point pairs to obtain a target gamma voltage of the second binding point.

[0024] The embodiments of the present application also provide a control chip, including: a communication interface configured to acquire a first gamma voltage corresponding to a first binding point, the first binding point being a binding point of a maximum gray scale of a display panel; the communication interface is also configured to acquire a second gamma voltage corresponding to a second binding point, the second binding point being a binding point of a next-value gray scale of the display panel, the next-value gray scale being a gray scale adjacent to the maximum gray scale in a preset display gray scale table; a control circuit configured to adjust, according to the first gamma voltage and the second gamma voltage, a gamma voltage corresponding to the second binding point to obtain a target gamma voltage of the second binding point; the control circuit is also configured to adjust the maximum gray scale in a gray scale-ACC lookup table preset for the display panel, so that a brightness of the next-value gray scale in the gray scale-ACC lookup table reaches a target brightness, the target brightness being a brightness of the maximum gray scale. The embodiments of the present application also provide a debugging device of a display panel, the device including:

[0025] a first acquisition module configured to acquire a first gamma voltage corresponding to a first binding point, the first binding point being a binding point of a maximum gray scale of a display panel;

[0026] a second acquisition module configured to acquire a second gamma voltage corresponding to a second binding point, the second binding point being a binding point of a next-value gray scale of the display panel, the next-value gray scale being a gray scale adjacent to the maximum gray scale in a preset display gray scale table;

[0027] an adjusting module configured to adjust the gamma voltage corresponding to the second binding point according to the first gamma voltage and the second gamma voltage, to obtain a target gamma voltage of the second binding point;

[0028] a step adjusting module configured to adjust the extreme gray scale in the preset gray scale-ACC lookup table of the display panel, to make the luminance of the sub-extreme gray scale in the gray scale-ACC lookup table reach a target luminance, the target luminance being the luminance of the extreme gray scale.

[0029] In some embodiments of the present application, each of the first binding points corresponds to a first binding point value, and each of the second binding points corresponds to a second binding point value; the adjusting module comprises:

[0030] an obtaining unit configured to determine a plurality of groups of binding point pairs, one group of the binding point pairs comprising a first binding point and a second binding point, and the absolute value of the difference between the binding point value of the first binding point and the binding point value of the second binding point being 1;

[0031] an adjusting unit configured to adjust the gamma voltage of the second binding point in each of the groups of binding point pairs to the gamma voltage of the first binding point, to obtain a target gamma voltage of the second binding point.

[0032] The present application has the following beneficial effects: the first gamma voltage corresponding to the extreme gray scale of the binding point pair of the display panel is obtained, and the second gamma voltage corresponding to the binding point pair of the sub-extreme gray scale adjacent to the extreme gray scale is obtained, the gamma voltage corresponding to the binding point of the sub-extreme gray scale is adjusted according to the first gamma voltage and the second gamma voltage, to obtain a target gamma voltage of the binding point of the sub-extreme gray scale, the extreme gray scale in the preset gray scale-ACC lookup table of the display panel is adjusted, to make the luminance of the sub-extreme gray scale in the gray scale-ACC lookup table reach a target luminance, the luminance penetration of the extreme gray scale is realized, and since the gray scales in the preset gray scale-ACC lookup table are adjusted according to the penetration effect and the gamma voltage between the binding points corresponding to the extreme gray scale is debugged, the OD LUT has a debugging space for the table of the extreme gray scale, and the response time of the pixels of the display panel is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] The technical solutions and other beneficial effects of the present application will become apparent through the following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

[0034] Figure 1 a schematic diagram of the overdrive contrast table provided by the embodiments of the present application;

[0035] Figure 2 a flowchart of the debugging method of the display panel provided by the embodiments of the present application;

[0036] Figure 3Another flowchart of a method for debugging a display panel is provided in the embodiments of the present application.

[0037] Figure 4 A waveform diagram of the debugging of the display panel is provided in the embodiments of the present application.

[0038] Figure 5 A structure diagram of a control chip is provided in the embodiments of the present application.

[0039] Figure 6 A structure diagram of a debugging device of the display panel is provided in the embodiments of the present application.

[0040] Figure 7 A structure diagram of a display terminal is provided in the embodiments of the present application.

[0041] Figure 8 Another structure diagram of the display terminal is provided in the embodiments of the present application. DETAILED DESCRIPTION

[0042] The specific structure and functional details disclosed herein are merely representative and are intended for purposes of describing exemplary embodiments of the present application. However, the present application can be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein.

[0043] In the description of the present application, it should be understood that the terms "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description and should not be construed as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, the term "comprise" and any variations thereof are intended to cover non-exclusive inclusion.

[0044] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a supporting connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms “a” and “an” as used herein are also intended to include the plural. It should also be understood that the terms “comprising” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, without excluding the presence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.

[0046] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0047] like Figure 2 As shown in the figure, this application embodiment provides a debugging method for a display panel, which may include:

[0048] 101. Obtain the first gamma voltage corresponding to the first binding point, wherein the first binding point is the binding point of the extreme grayscale of the display panel.

[0049] Grayscale refers to the grayscale value of a pixel on a display panel, typically between 0 and 255. Extreme grayscale values ​​can be the maximum grayscale value, the minimum grayscale value, or a combination of both. For example, extreme grayscale values ​​can be 0, 255, or a combination of 255 and 0.

[0050] In typical display panel designs, seven pairs of independent binding points are typically used: gm1, gm2, ..., gm14. Each binding point corresponds to a gamma voltage. Taking the extreme grayscale 0 (L0) as an example, its first binding points are gm7 and gm8. The first gamma voltage corresponding to gm7 is the positive frame voltage, and the first gamma voltage corresponding to gm8 is the negative frame voltage. Similarly, taking the extreme grayscale 255 (L255) as another example, its first binding points are gm1 and gm14. The first gamma voltage corresponding to gm1 is the positive frame voltage, and the first gamma voltage corresponding to gm14 is the negative frame voltage.

[0051] Specifically, the first gamma voltage corresponding to the first binding point can be obtained according to the identification of the display panel from a preset identification and binding point gamma voltage comparison table, and the obtaining process is as follows: the binding point corresponding to the extreme gray scale (the maximum gray scale and / or the minimum gray scale) is found from the comparison table as the first binding point, and the gamma voltage corresponding to the first binding point is the first gamma voltage. As shown in Table 1, it is a table of binding point corresponding gamma voltage of a display panel, wherein gamma1-gamma14 are the gamma voltages of binding points gm1-gm14 respectively. As can be seen from the table, the first gamma voltage can be at least one of 11.926V, 0.25V, 7.197V or 5.602V.

[0052] Table 1: Table of binding point corresponding gamma voltage of a display panel

[0053]

[0054] 102, obtain the second gamma voltage corresponding to the second binding point, the second binding point being the binding point of the secondary gray scale of the display panel, the secondary gray scale being the gray scale adjacent to the extreme gray scale in the preset display gray scale table.

[0055] The secondary gray scale is the gray scale adjacent to the extreme gray scale in the preset display gray scale table, that is, the difference between the display gray scale value of the secondary gray scale and the display gray scale value of the extreme gray scale is the step of the gray scale value in the preset display gray scale table.

[0056] The preset display gray scale table refers to a table preset to record the order of gray scales in the order of display gray scale values with a preset step, for example, the display gray scale table can be a table of 1 row and 256 columns, the display gray scale value is 0-255, and the step is 1. The gray scale 0 (L0) is adjacent to the gray scale L1, and the gray scale 255 (L255) is adjacent to the gray scale L254, that is, the secondary gray scale can be 1, 254 or a combination of 254 and 1.

[0057] The second binding point is the binding point of the secondary gray scale, and the corresponding gamma voltage is the second gamma voltage. Taking the secondary gray scale 1 (L1) as an example, the corresponding second binding point is gm6 and gm9, the second gamma voltage corresponding to gm6 is the positive frame voltage, and the second gamma voltage corresponding to gm9 is the negative frame voltage. Taking the extreme gray scale 254 (L254) as an example, the corresponding second binding point is gm2 and gm13, the second gamma voltage corresponding to gm2 is the positive frame voltage, and the second gamma voltage corresponding to gm13 is the negative frame voltage.

[0058] Specifically, the second gamma voltage in the embodiment is obtained in the same way as the first gamma voltage in step 101, which will not be described here.

[0059] Continuing with the example of Table 1, the second gamma voltage can be at least one of 7.25V, 5.519V, 11.87V, or 0.444V.

[0060] 103. Adjusting the second gamma voltage corresponding to the second bind point according to the first gamma voltage and the second gamma voltage to obtain a target gamma voltage of the second bind point.

[0061] Wherein, the target gamma voltage is the adjusted gamma voltage of the second bind point, and the voltage difference can trigger the OD effect.

[0062] Generally, since the OD LUT cannot provide larger or smaller values for extreme gray scales (such as L255, L0), etc., the adjusted gray scale does not have a corresponding overvoltage value, resulting in the inability to debug. Therefore, in the embodiment, the gamma voltage of the second bind point of the sub-value gray scale is adjusted according to the first gamma voltage corresponding to the extreme gray scale and the second gamma voltage corresponding to the sub-value gray scale. The adjustment method can be to directly adjust the gamma voltage of the second bind point to the first gamma voltage, or to obtain the target gamma voltage of the second bind point by interpolation operation according to the first gamma voltage and the second gamma voltage.

[0063] It can be understood that in the embodiment, the gamma voltage of the sub-value gray scale is adjusted according to the gamma voltage of the extreme gray scale and the sub-value gray scale, so that the extreme gray scale based on the ODLUT lookup has a corresponding overvoltage value.

[0064] 104. Adjusting the extreme gray scale in the preset gray scale-ACC lookup table of the display panel to make the brightness of the sub-value gray scale in the gray scale-ACC lookup table reach a target brightness, and the target brightness is the brightness of the extreme gray scale.

[0065] Wherein, the preset gray scale-ACC (Accurate Color Capture) lookup table is the ACC LUT of the display panel, and one gray scale value corresponds to one brightness. Adjusting the gray scale value in the ACC LUT includes two adjustment methods: cutting and increasing.

[0066] Specifically, the extreme value gray scale can be adjusted according to the brightness of the sub-value gray scale and the brightness of the extreme value gray scale, so that the brightness of the sub-value gray scale is the same as or close to the brightness of the extreme value gray scale, and thus for L255, the adjusted gray scale is less than 255, and the adjustment manner is to cut the gray scale, and for L0, the adjusted gray scale is greater than 0, and the adjustment manner is to increase the gray scale. More specifically, if in step 103, the second binding point corresponding gamma voltage is adjusted in the following manner according to the first gamma voltage and the second gamma voltage: the gamma voltage of the second binding point is directly adjusted to the first gamma voltage, then the extreme value gray scale in this embodiment can be directly adjusted to the sub-value gray scale, so that the brightness of the sub-value gray scale is the same as or close to the brightness of the extreme value gray scale, the gamma voltage of the extreme value gray scale is released, so that the pixel of the display panel corresponding to the extreme value gray scale does not participate in display, and the display effect of the display panel is improved. At the same time, since each gray scale in the OD LUT remains unchanged, there is a debugging space for the extreme value gray scale, the overvoltage required for the extreme value gray scale is overdriven, and the response time of the pixel of the display panel is reduced.

[0067] In an embodiment of the present application, the extreme value gray scale includes a maximum gray scale of the display panel, the first binding point includes a binding point of the maximum gray scale of the display panel, the first gamma voltage includes a gamma voltage of the binding point of the maximum gray scale, and the second binding point includes a neighboring binding point of the maximum gray scale of the display panel, and the second gamma voltage includes a gamma voltage of the neighboring binding point of the maximum gray scale.

[0068] In an embodiment of the present application, the extreme value gray scale includes a maximum gray scale of the display panel, the first binding point includes a binding point of the maximum gray scale of the display panel, the first gamma voltage includes a gamma voltage of the binding point of the maximum gray scale, and the second binding point includes a neighboring binding point of the maximum gray scale of the display panel, and the second gamma voltage includes a gamma voltage of the neighboring binding point of the maximum gray scale.

[0069] In an embodiment of the present application, the step 103 includes: adjusting the gamma voltage of the neighboring binding point of the maximum gray scale to the gamma voltage of the binding point of the maximum gray scale to obtain the target gamma voltage of the neighboring binding point of the maximum gray scale.

[0070] Specifically, in the embodiment, the gamma voltage of the adjacent binding point of the maximum gray scale is adjusted to the gamma voltage of the binding point of the maximum gray scale to obtain the target gamma voltage of the adjacent binding point of the maximum gray scale. Taking the maximum gray scale L255 as an example, the gamma voltage of each second binding point of L254 is adjusted to the corresponding gamma voltage of each first binding point of L255, that is, the corresponding gamma voltage of gm2 is adjusted to the corresponding gamma voltage of gm1, and the corresponding gamma voltage of gm13 is adjusted to the corresponding gamma voltage of gm14. As shown in Table 2, a table of the target gamma voltage of the adjacent binding point of the maximum gray scale is shown, wherein the table is obtained by adjusting the gamma voltage on the basis of Table 1.

[0071] Table 2: Target gamma voltage of adjacent binding point of maximum gray scale

[0072]

[0073]

[0074] It can be understood that, in the embodiment, by adjusting the gamma voltage of the adjacent binding point of the maximum gray scale to the gamma voltage of the binding point of the maximum gray scale, the pressure difference between the gamma voltage of the adjacent binding point of the maximum gray scale and the gamma voltage of the binding point of the maximum gray scale is increased, so that the display panel can provide higher gamma voltage, while ensuring that the maximum gray scale has debugging space.

[0075] In an embodiment of the present application, the step 104 of adjusting the extreme gray scale in the gray scale-ACC correspondence table preset for the display panel to make the sub-extreme gray scale in the gray scale-ACC correspondence table reach the target brightness includes: cutting the maximum gray scale in the gray scale-ACC correspondence table preset for the display panel to adjust the gray scale value of the maximum gray scale in the gray scale-ACC correspondence table to the gray scale value of the sub-extreme gray scale corresponding to the maximum gray scale, so that the sub-extreme gray scale in the gray scale-ACC correspondence table reaches the target brightness.

[0076] Specifically, the maximum gray scale in the gray scale-ACC correspondence table preset for the display panel is cut to adjust the gray scale value of the maximum gray scale in the gray scale-ACC correspondence table to the gray scale value of the sub-extreme gray scale corresponding to the maximum gray scale, so that the sub-extreme gray scale in the gray scale-ACC correspondence table reaches the target brightness.

[0077] For example, in one embodiment, the first binding points gm1 and gm14 correspond to a luminance of 248 nits for the maximum gray scale L255, which is the maximum luminance that the display panel can reach. According to the liquid crystal characteristics, in order to avoid the display panel from generating checkerboard residual images and other undesirable phenomena, the maximum gray scale L255 in the preset gray scale-ACC correspondence table is adjusted to L254 in this embodiment, that is, the value of 255 in the ACC LUT is adjusted to 254, so that the luminance of L254 is the same as that of the original L255, thereby ensuring the display effect of the display panel.

[0078] In one embodiment of the present application, the extreme gray scale includes a minimum gray scale of the display panel, the second binding point includes a binding point of the minimum gray scale of the display panel, the second gamma voltage includes a gamma voltage of the binding point of the minimum gray scale, the first binding point includes a neighboring binding point of the minimum gray scale of the display panel, and the first gamma voltage includes a gamma voltage of the neighboring binding point of the minimum gray scale.

[0079] In one embodiment of the present application, the extreme gray scale includes a minimum gray scale of the display panel, the second binding point includes a binding point of the minimum gray scale of the display panel, the second gamma voltage includes a gamma voltage of the binding point of the minimum gray scale, the first binding point includes a neighboring binding point of the minimum gray scale of the display panel, and the first gamma voltage includes a gamma voltage of the neighboring binding point of the minimum gray scale.

[0080] In one embodiment of the present application, the step of adjusting the gamma voltage corresponding to the second binding point according to the first gamma voltage and the second gamma voltage in step 103 to obtain the target gamma voltage of the second binding point includes adjusting the gamma voltage of the neighboring binding point of the minimum gray scale to the gamma voltage of the binding point of the minimum gray scale to obtain the target gamma voltage of the neighboring binding point of the minimum gray scale.

[0081] Specifically, in this embodiment, the target gamma voltage of the neighboring binding point of the minimum gray scale is obtained by adjusting the gamma voltage of the neighboring binding point of the minimum gray scale to the gamma voltage of the binding point of the minimum gray scale. Taking the minimum gray scale L0 as an example, the gamma voltages of each second binding point of L1 are adjusted to the gamma voltages corresponding to each first binding point of L0, that is, the gamma voltage corresponding to gm6 is adjusted to the gamma voltage corresponding to gm7, and the gamma voltage corresponding to gm9 is adjusted to the gamma voltage corresponding to gm8. As shown in Table 3, the table is a table of the target gamma voltage of the neighboring binding point of the minimum gray scale, which is obtained by adjusting the gamma voltage on the basis of Table 1.

[0082] Table 3: Target gamma voltage of adjacent binding points of minimum gray scale

[0083]

[0084] It can be understood that, in the embodiment, by adjusting the gamma voltage of the adjacent binding point of the minimum gray scale to the gamma voltage of the binding point of the minimum gray scale, the minimum gray scale has a debugging space.

[0085] In an embodiment of the present application, the step of adjusting the extreme gray scale in the gray scale-ACC correspondence table preset for the display panel in step 104 to make the sub-extreme gray scale in the gray scale-ACC correspondence table reach the target brightness includes: increasing the minimum gray scale in the gray scale-ACC correspondence table preset for the display panel to adjust the gray scale value of the minimum gray scale in the gray scale-ACC correspondence table to the gray scale value of the sub-extreme gray scale corresponding to the minimum gray scale, so that the sub-extreme gray scale in the gray scale-ACC correspondence table reaches the target brightness.

[0086] Specifically, the maximum gray scale in the gray scale-ACC correspondence table preset for the display panel is reduced to adjust the gray scale value of the maximum gray scale in the gray scale-ACC correspondence table to the gray scale value of the sub-extreme gray scale corresponding to the maximum gray scale, so that the sub-extreme gray scale in the gray scale-ACC correspondence table reaches the target brightness.

[0087] For example, in a specific embodiment, the luminance of the first binding points gm7 and gm8 corresponding to the minimum gray scale L0 is 0.0437 nit, and the luminance is the minimum luminance of the display panel. According to the liquid crystal characteristics, in order to avoid the display panel from generating checkerboard residual image and other undesirable phenomena, in the embodiment, the minimum gray scale L0 in the preset gray scale-ACC correspondence table is adjusted to L1, that is, the value of 0 in the ACC LUT is adjusted to 1, and then the luminance of L1 is the same as the original luminance of L0, so as to ensure the display effect of the display panel.

[0088] As shown in Figure 3 In an embodiment of the present application, each of the first binding points corresponds to a first binding point value, and each of the second binding points corresponds to a second binding point value; the step of adjusting the gamma voltage corresponding to the second binding point according to the first gamma voltage and the second gamma voltage in step 103 to obtain the target gamma voltage of the second binding point includes:

[0089] 103A, a plurality of groups of binding point pairs are determined, and each of the binding point pairs includes a first binding point and a second binding point, and the absolute value of the difference between the binding point value of the first binding point and the binding point value of the second binding point is 1;

[0090] 103B, adjusting the gamma voltage of the second binding point in each group of the binding point pair to the gamma voltage of the first binding point to obtain the target gamma voltage of the second binding point.

[0091] Wherein, a group of binding point pairs is a combination of a first binding point and a second binding point, that is, one binding point in the extreme gray scale and one binding point in the sub-value gray scale, whether the first binding point and the second binding point are a group of binding point pairs can be determined by judging whether the absolute value of the difference between the binding point value of the first binding point and the binding point value of the second binding point is 1. Due to the design characteristics of the display panel, in the case that the absolute value of the difference between the binding point value of the first binding point and the binding point value of the second binding point is 1, it can be ensured that one binding point in the extreme gray scale and the binding point in the sub-value gray scale are corresponding, thereby ensuring the accuracy of subsequent adjustment of the gamma voltage of the corresponding binding point.

[0092] For example, in a specific embodiment, there are four groups of binding point pairs, G1(gm1, gm2), G2(gm7, gm6), G3(gm8, gm9), and G4(gm14, gm13). Therefore, according to the plurality of groups of binding point pairs, the gamma voltage corresponding to gm2 is adjusted to the gamma voltage corresponding to gm1, the gamma voltage corresponding to gm6 is adjusted to the gamma voltage corresponding to gm7, the gamma voltage corresponding to gm9 is adjusted to the gamma voltage corresponding to gm8, and the gamma voltage corresponding to gm13 is adjusted to the gamma voltage corresponding to gm14, thereby achieving adjustment of the gamma voltage of the binding points corresponding to the maximum gray scale and the minimum gray scale in the extreme gray scale, and improving the debugging efficiency of the display panel.

[0093] The embodiment of the present application obtains the first gamma voltage corresponding to the binding point of the extreme gray scale of the display panel, and obtains the second gamma voltage corresponding to the binding point of the sub-value gray scale adjacent to the extreme gray scale. The gamma voltage corresponding to the binding point of the sub-value gray scale is adjusted according to the first gamma voltage and the second gamma voltage to obtain the target gamma voltage of the binding point of the sub-value gray scale. The extreme gray scale in the preset gray scale-ACC lookup table of the display panel is adjusted to make the brightness of the sub-value gray scale in the gray scale-ACC lookup table reach the target brightness, thereby realizing the brightness penetration of the extreme gray scale. Moreover, the gray scale in the preset gray scale-ACC lookup table is adjusted according to the penetration effect, and the gamma voltage between the binding points corresponding to the extreme gray scale is debugged, so that the ODLUT has a debugging space for the table of the extreme gray scale, and the response time of the pixels of the display panel is reduced.

[0094] In one example, as Figure 4As shown, a waveform diagram for display panel debugging is shown, wherein the gray line is the data voltage of acc on / odon; the white line is the data of acc off / od off, when the brightness (the rising edge triggers the white line) is from 0-255, the gray line triggers the first frame OD, and then stabilizes at L255 corresponding to the data corresponding to ACC LUT. As can be seen from the figure, using the debugging method in the embodiment of the application, L255 and L0 can be debugged, and the technical problem of limited debugging space in the prior art is solved.

[0095] In another example, for a display panel of 238-2 165hz, Table 4 and Table 5 are respectively the response time of the pixel of the display panel after debugging using the prior art (OD LUT) and the response time of the pixel of the display panel after debugging using the debugging method of the display panel in the embodiment of the application:

[0096] Table 4: Response time of pixel of display panel after debugging using OD LUT

[0097]

[0098] Table 4: Response time of pixel of display panel after debugging using the debugging method of the display panel

[0099]

[0100] By comparing the response times in Table 4 and Table 5, it is obvious that the response time of the display panel is greatly optimized.

[0101] Correspondingly, the embodiment of the application also provides a control chip 100, more specifically, the control chip 100 is a Tcon chip (Timing Controller, timing control chip). The control chip 100 is configured to control the adjustment of the gray scale-ACC lookup table of the display panel, so that the debugging according to the adjusted gray scale-ACC lookup table can reduce the response time of the pixel of the display panel.

[0102] As Figure 5 shown, the control chip 100 includes a communication interface 110 and a control circuit 120.

[0103] The communication interface 110 is configured to acquire a first gamma voltage corresponding to a first bind point, the first bind point being a bind point of a maximum gray scale of the display panel; the communication interface 110 is further configured to acquire a second gamma voltage corresponding to a second bind point, the second bind point being a bind point of a minimum gray scale of the display panel, the minimum gray scale being a gray scale adjacent to the maximum gray scale in a preset display gray scale table; the control circuit 120 is configured to adjust the gamma voltage corresponding to the second bind point according to the first gamma voltage and the second gamma voltage, to obtain a target gamma voltage of the second bind point; and the control circuit 120 is further configured to adjust the maximum gray scale in a gray scale-ACC lookup table preset for the display panel, so that the brightness of the minimum gray scale in the gray scale-ACC lookup table reaches a target brightness, the target brightness being the brightness of the maximum gray scale.

[0104] Correspondingly, the embodiment of the present application further provides a display panel debugging device, which can implement all processes of the display panel debugging method in the above embodiment.

[0105] As shown in Figure 6 The display panel debugging device provided by the embodiment of the present application comprises:

[0106] The first acquisition module 201 is configured to acquire a first gamma voltage corresponding to a first bind point, the first bind point being a bind point of a maximum gray scale of the display panel;

[0107] The second acquisition module 202 is configured to acquire a second gamma voltage corresponding to a second bind point, the second bind point being a bind point of a minimum gray scale of the display panel, the minimum gray scale being a gray scale adjacent to the maximum gray scale in a preset display gray scale table;

[0108] The adjustment module 203 is configured to adjust the gamma voltage corresponding to the second bind point according to the first gamma voltage and the second gamma voltage, to obtain a target gamma voltage of the second bind point;

[0109] The adjustment module 203 is configured to adjust the gamma voltage corresponding to the second bind point according to the first gamma voltage and the second gamma voltage, to obtain a target gamma voltage of the second bind point;

[0110] In some embodiments of the present application, each of the first bind points corresponds to a first bind point value, and each of the second bind points corresponds to a second bind point value; and the adjustment module 203 specifically comprises:

[0111] The acquisition unit is configured to determine a plurality of groups of binding point pairs, one group of the binding point pairs including a first binding point and a second binding point, and an absolute value of a difference between a binding point value of the first binding point and a binding point value of the second binding point being 1.

[0112] The adjustment unit is configured to adjust a gamma voltage of the second binding point in each group of the binding point pairs to a gamma voltage of the first binding point, to obtain a target gamma voltage of the second binding point.

[0113] In some embodiments of the present application, the adjustment module specifically includes:

[0114] The first adjustment unit is configured to adjust a gamma voltage of the adjacent binding point of the maximum gray scale to a gamma voltage of the binding point of the maximum gray scale, to obtain a target gamma voltage of the adjacent binding point of the maximum gray scale.

[0115] In some embodiments of the present application, the adjustment module specifically includes:

[0116] The cutting step unit is configured to cut the maximum gray scale in a preset gray scale-ACC correspondence table of the display panel, to adjust a gray scale value of the maximum gray scale in the gray scale-ACC correspondence table to a gray scale value of the next-value gray scale corresponding to the maximum gray scale, so that the next-value gray scale in the gray scale-ACC correspondence table reaches a target brightness.

[0117] In some embodiments of the present application, the adjustment module specifically includes:

[0118] The second adjustment unit is configured to adjust a gamma voltage of the adjacent binding point of the minimum gray scale to a gamma voltage of the binding point of the minimum gray scale, to obtain a target gamma voltage of the adjacent binding point of the minimum gray scale.

[0119] In some embodiments of the present application, the adjustment module specifically includes:

[0120] The increasing step unit is configured to increase the minimum gray scale in a preset gray scale-ACC correspondence table of the display panel, to adjust a gray scale value of the minimum gray scale in the gray scale-ACC correspondence table to a gray scale value of the next-value gray scale corresponding to the minimum gray scale, so that the next-value gray scale in the gray scale-ACC correspondence table reaches a target brightness.

[0121] In addition, the embodiments of the present application also provide a display terminal, which can be a smart phone, a tablet computer, a television or the like. As shown in Figure 7 The display terminal 400 includes a processor 401 and a memory 402. The processor 401 is electrically connected to the memory 402.

[0122] The processor 401 is the control center of the display terminal 400, and connects each part of the display terminal through various interfaces and lines, executes various functions of the display terminal and processes data by running or loading the application programs stored in the memory 402 and calling the data stored in the memory 402, thereby monitoring the display terminal as a whole.

[0123] In the embodiment, the processor 401 in the display terminal 400 loads the instructions corresponding to the processes of one or more application programs into the memory 402, and runs the application programs stored in the memory 402 by the processor 401, thereby realizing various functions according to the following steps:

[0124] obtaining a first gamma voltage corresponding to a first binding point, the first binding point being a binding point of an extreme gray scale of the display panel;

[0125] obtaining a second gamma voltage corresponding to a second binding point, the second binding point being a binding point of a sub-value gray scale of the display panel, the sub-value gray scale being a gray scale adjacent to the extreme gray scale in a preset display gray scale table;

[0126] adjusting the gamma voltage corresponding to the second binding point according to the first gamma voltage and the second gamma voltage to obtain a target gamma voltage of the second binding point;

[0127] adjusting the extreme gray scale in a preset gray scale-ACC lookup table of the display panel to make the brightness of the sub-value gray scale in the gray scale-ACC lookup table reach a target brightness, the target brightness being the brightness of the extreme gray scale.

[0128] Please refer to Figure 8 , Figure 8 A structural schematic diagram of a display terminal provided by the embodiment is shown. The display terminal 300 can include RF circuit 310, memory 320 including one or more computer readable storage media, input unit 330, display unit 340, sensor 350, audio circuit 360, speaker 361, microphone 362, transmission module 370, processor 380 including one or more processing cores, and power supply 390, and the like. Those skilled in the art can understand that the display terminal structure does not constitute a limitation on the display terminal, and can include more or fewer components than the diagram, or combine certain components, or different component arrangements.

[0129] The RF circuit 310 is used to receive and send electromagnetic waves, and to convert the electromagnetic waves and electrical signals to each other, so as to communicate with a communication network or other devices. The RF circuit 310 can include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption / decryption chip, a subscriber identity module (SIM) card, a memory, and the like. The RF circuit 310 can communicate with various networks, such as the Internet, an intranet, a wireless network, or other devices through the wireless network. The wireless network can include a cellular telephone network, a wireless local area network or metropolitan area network. The wireless network can use various communication standards, protocols and technologies, including but not limited to Global System for Mobile Communications (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Access (CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wi-Fi) (such as IEEE 802.11a, IEEE 802.11b, IEEE 802.11g and / or IEEE 802.11n), Voice over Internet Protocol (VoIP), Worldwide Interoperability for Microwave Access (Wi-Max), other protocols for email, instant messaging and short message service, and any other suitable communication protocol, even those not yet developed as of the date of the disclosure.

[0130] The memory 320 can be used to store software programs and modules, and the processor 380 can execute various functions and data processing by running the software programs and modules stored in the memory 320, i.e. to realize the function of automatic light compensation when the front camera takes a picture. The memory 320 can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 320 can further include a memory remotely arranged with respect to the processor 380, which can be connected to the display terminal 300 through a network. Examples of the network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0131] The input unit 330 can be configured to receive input of numbers or characters, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls. Specifically, the input unit 330 can include a touch-sensitive surface 331 and other input devices 332. The touch-sensitive surface 331, also known as a touch display or touchpad, can collect touch operations (such as operations of a user using a finger, a stylus, or any suitable object or accessory near the touch-sensitive surface 331) on or near the touch-sensitive surface 331 and drive corresponding connections according to a pre-set program. Optionally, the touch-sensitive surface 331 can include two parts of touch detection devices and touch controllers. Among them, the touch detection devices detect the touch position of the user and detect the signals generated by the touch operation, and transmit the signals to the touch controller; the touch controller receives the touch information from the touch detection device and converts it into touch coordinates, and sends it to the processor 380, and can receive commands from the processor 380 and execute them. In addition, the touch-sensitive surface 331 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch-sensitive surface 331, the input unit 330 can also include other input devices 332. Specifically, the other input devices 332 can include one or more of a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), trackballs, mice, joysticks, etc.

[0132] The display unit 340 can be configured to display information input by a user or information provided to a user and display various graphical user interfaces of the terminal 300, which can be composed of graphics, text, icons, video, and any combination thereof. The display unit 340 can include the above-mentioned display panel 341, and optionally, the display panel 341 can be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), etc. Further, the touch-sensitive surface 331 can cover the display panel 341, and when the touch-sensitive surface 331 detects a touch operation on or near it, it transmits to the processor 380 to determine the type of touch event, and then the processor 380 provides corresponding visual output on the display panel 341 according to the type of touch event. Although the touch-sensitive surface 331 and the display panel 341 are implemented as two independent components to realize input and output functions in the figure, in some embodiments, the touch-sensitive surface 331 and the display panel 341 can be integrated to realize input and output functions.

[0133] The display terminal 300 can also include at least one sensor 350, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor can include an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 341 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 341 and / or the backlight when the display terminal 300 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally three axes), and when at rest, it can detect the magnitude and direction of gravity, which can be used for applications such as identifying the posture of the mobile phone (such as switching between horizontal and vertical screens, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. As for other sensors that the display terminal 300 can also be configured, such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., will not be described here.

[0134] The audio circuit 360, the speaker 361, and the microphone 362 can provide an audio interface between the user and the display terminal 300. The audio circuit 360 can convert the received audio data into an electrical signal and transmit it to the speaker 361, which converts it into a sound signal for output. On the other hand, the microphone 362 converts the collected sound signal into an electrical signal, which is received by the audio circuit 360 and converted into audio data. After being processed by the processor 380, the audio data is output to the RF circuit 310 for transmission to another terminal, for example, or to the memory 320 for further processing. The audio circuit 360 can also include a jack for providing communication between an external earphone and the display terminal 300.

[0135] The display terminal 300 can help users send and receive emails, browse web pages, and access streaming media, etc. through the transmission module 370 (such as a Wi-Fi module), which provides users with wireless broadband Internet access. Although the transmission module 370 is shown in the figure, it is understood that it does not belong to the necessary components of the display terminal 300, and can be omitted as needed without changing the essence of the invention.

[0136] The processor 380 is the control center of the display terminal 300, and connects various parts of the mobile phone through various interfaces and lines, and performs various functions and processes data of the display terminal 300 by running or executing software programs and / or modules stored in the memory 320 and calling data stored in the memory 320, thereby monitoring the mobile phone as a whole. Optionally, the processor 380 can include one or more processing cores; in some embodiments, the processor 380 can integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 380.

[0137] The display terminal 300 further includes a power supply 390 (such as a battery) for supplying power to various components, and in some embodiments, the power supply can be logically connected to the processor 380 through a power management system, so as to realize functions such as management of charging, discharging and power consumption management through the power management system. The power supply 390 can also include one or more than one direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power state indicator, and any other components.

[0138] Although not shown, the display terminal 300 can also include a camera (such as a front camera or a rear camera), a Bluetooth module, and the like, which will not be described here. In particular, in the present embodiment, the display unit of the display terminal is a touch screen display, and the display terminal further includes a memory and one or more than one program, wherein the one or more than one program is stored in the memory and is configured to be executed by the one or more than one processor, and the one or more than one program includes instructions for performing the following operations:

[0139] obtaining a first gamma voltage corresponding to a first binding point, the first binding point being a binding point of an extreme gray scale of the display panel;

[0140] obtaining a second gamma voltage corresponding to a second binding point, the second binding point being a binding point of a secondary gray scale of the display panel, the secondary gray scale being a gray scale adjacent to the extreme gray scale in a preset display gray scale table;

[0141] adjusting the gamma voltage corresponding to the second binding point according to the first gamma voltage and the second gamma voltage to obtain a target gamma voltage of the second binding point;

[0142] adjusting the extreme gray scale in a gray scale-ACC lookup table preset for the display panel to make the brightness of the secondary gray scale in the gray scale-ACC lookup table reach a target brightness, the target brightness being the brightness of the extreme gray scale.

[0143] In practice, the above modules can be implemented as independent entities, or combined as the same or several entities, and the specific implementation of the above modules can be referred to the method embodiments above, which will not be repeated here.

[0144] Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructions, or by relevant hardware controlled by the instructions, and the instructions can be stored in a computer readable storage medium and loaded and executed by a processor. Therefore, the embodiments of the present application provide a storage medium, which stores a plurality of instructions capable of being loaded by a processor to execute the steps in any of the display panel debugging methods provided by the embodiments of the present application.

[0145] The storage medium can include a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0146] Since the instructions stored in the storage medium can execute the steps in any of the display panel debugging methods provided by the embodiments of the present application, the beneficial effects of any of the display panel debugging methods provided by the embodiments of the present application can be achieved, which will be described in detail in the above embodiments, and will not be repeated here.

[0147] The specific implementation of the above operations can be referred to the above embodiments, which will not be repeated here.

Claims

1. A method for debugging a display panel, characterized in that, The method includes: Obtain the first gamma voltage corresponding to the first binding point, where the first binding point is the binding point of the extreme grayscale of the display panel; Obtain the second gamma voltage corresponding to the second binding point, where the second binding point is the binding point of the secondary gray level of the display panel, and the secondary gray level is the gray level adjacent to the extreme gray level in the preset display gray level table. Based on the first gamma voltage and the second gamma voltage, the gamma voltage corresponding to the second binding point is adjusted to obtain the target gamma voltage of the second binding point; The extreme grayscale values ​​in the grayscale-ACC lookup table preset on the display panel are adjusted so that the brightness of the secondary grayscale values ​​in the grayscale-ACC lookup table reaches the target brightness, where the target brightness is the brightness of the extreme grayscale values.

2. The debugging method for the display panel as described in claim 1, characterized in that, The extreme grayscale includes the maximum grayscale of the display panel, the first binding point includes the binding point of the maximum grayscale of the display panel, the first gamma voltage includes the gamma voltage of the binding point of the maximum grayscale, the second binding point includes the adjacent binding point of the maximum grayscale of the display panel, and the second gamma voltage includes the gamma voltage of the adjacent binding point of the maximum grayscale.

3. The debugging method for the display panel as described in claim 2, characterized in that, The step of adjusting the gamma voltage corresponding to the second binding point based on the first gamma voltage and the second gamma voltage to obtain the target gamma voltage of the second binding point includes: The gamma voltage of the adjacent binding point of the maximum gray level is adjusted to the gamma voltage of the binding point of the maximum gray level to obtain the target gamma voltage of the adjacent binding point of the maximum gray level.

4. The debugging method for the display panel as described in claim 3, characterized in that, The step of adjusting the extreme gray levels in the preset gray-ACC lookup table of the display panel to make the secondary gray levels in the gray-ACC lookup table reach the target brightness includes: The maximum gray level in the preset gray-ACC lookup table of the display panel is reduced to adjust the gray level value of the maximum gray level in the gray-ACC lookup table to the gray level value of the secondary gray level corresponding to the maximum gray level, so that the secondary gray level in the gray-ACC lookup table reaches the target brightness.

5. The debugging method for the display panel as described in claim 2 or 3, characterized in that, The extreme grayscale includes the minimum grayscale of the display panel, the second binding point includes the binding point of the minimum grayscale of the display panel, the second gamma voltage includes the gamma voltage of the binding point of the minimum grayscale, the first binding point includes the adjacent binding point of the minimum grayscale of the display panel, and the first gamma voltage includes the gamma voltage of the adjacent binding point of the minimum grayscale.

6. The debugging method for the display panel as described in claim 5, characterized in that, The step of adjusting the gamma voltage corresponding to the second binding point based on the first gamma voltage and the second gamma voltage to obtain the target gamma voltage of the second binding point includes: The gamma voltage of the adjacent binding point of the minimum gray level is adjusted to the gamma voltage of the binding point of the minimum gray level to obtain the target gamma voltage of the adjacent binding point of the minimum gray level.

7. The debugging method for the display panel as described in claim 6, characterized in that, The step of adjusting the extreme gray levels in the preset gray-ACC lookup table of the display panel to make the secondary gray levels in the gray-ACC lookup table reach the target brightness includes: The minimum gray level in the preset gray-ACC lookup table of the display panel is incremented to adjust the gray level value of the minimum gray level in the gray-ACC lookup table to the gray level value of the secondary gray level corresponding to the minimum gray level, so that the secondary gray level in the gray-ACC lookup table reaches the target brightness.

8. The debugging method for the display panel as described in claim 1, characterized in that, Each of the first binding points corresponds to a first binding point value, and each of the second binding points corresponds to a second binding point value; The step of adjusting the gamma voltage corresponding to the second binding point based on the first gamma voltage and the second gamma voltage to obtain the target gamma voltage of the second binding point includes: Multiple sets of binding point pairs are determined, wherein each binding point pair includes a first binding point and a second binding point, and the absolute value of the difference between the binding point value of the first binding point and the binding point value of the second binding point is 1; The gamma voltage of the second binding point in each pair of binding points is adjusted to the gamma voltage of the first binding point to obtain the target gamma voltage of the second binding point.

9. A control chip, characterized in that, include: The communication interface is configured to acquire the first gamma voltage corresponding to the first binding point, where the first binding point is the binding point of the extreme grayscale of the display panel; The communication interface is further configured to acquire a second gamma voltage corresponding to a second binding point, wherein the second binding point is a binding point of the secondary grayscale of the display panel, and the secondary grayscale is a grayscale adjacent to the extreme grayscale in a preset display grayscale table; the control circuit is configured to adjust the gamma voltage corresponding to the second binding point according to the first gamma voltage and the second gamma voltage to obtain a target gamma voltage for the second binding point; the control circuit is further configured to adjust the extreme grayscale in a preset grayscale-ACC lookup table of the display panel so that the brightness of the secondary grayscale in the grayscale-ACC lookup table reaches a target brightness, wherein the target brightness is the brightness of the extreme grayscale.

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