Gamma debugging method and debugging system

Abstract

This invention discloses a gamma tuning method and system. The method includes acquiring target optical parameters of at least two regions in a display panel at different preset binding grayscale levels. The at least two regions include a first region and a second region, and the preset binding grayscale levels include a first binding grayscale and a second binding grayscale. Simultaneously, the method acquires measured optical parameters of the first region at the first binding grayscale and measured optical parameters of the second region at the second binding grayscale. Based on the target optical parameters of the first region at the first binding grayscale and the measured optical parameters of the first region at the first binding grayscale, the method determines the target gamma register value of the display panel at the first binding grayscale. Furthermore, based on the target optical parameters of the second region at the second binding grayscale and the measured optical parameters of the second region at the second binding grayscale, the method determines the target gamma register value of the display panel at the second binding grayscale. This solution can shorten the single-chip tuning time and improve tuning efficiency.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a Gamma debugging method and debugging system. Background Technology

[0002] Existing display panel products, such as OLED (Organic Light-Emitting Diode) display panels, require Gamma adjustment to ensure that the brightness changes of the display panel at various gray levels conform to the brightness perception curve of the human eye. This involves correcting the mapping relationship between gray levels and Gamma register values ​​so that the final output gray level brightness curve is consistent with human eye perception, thereby achieving matching with the target Gamma index curve (such as γ=2.2).

[0003] However, existing debugging methods suffer from long debugging times and low efficiency for single-chip debugging, which urgently need to be addressed. Summary of the Invention

[0004] This invention provides a Gamma debugging method and system to shorten the debugging time of a single chip and improve debugging efficiency.

[0005] According to one aspect of the present invention, a Gamma tuning method is provided, comprising: S1. Obtain the target optical parameters of at least two regions in the display panel at different preset binding gray levels; the at least two regions include a first region and a second region, and the preset binding gray levels include a first binding gray level and a second binding gray level; the first binding gray level is different from the second binding gray level, and the first binding gray level and the second binding gray level are both smaller than the maximum gray level of the display panel. S2. Simultaneously acquire the measured optical parameters of the first region under the first binding grayscale and the measured optical parameters of the second region under the second binding grayscale. S3. Determine the target Gamma register value of the display panel in the first binding grayscale based on the target optical parameters of the first region in the first binding grayscale and the measured optical parameters of the first region in the first binding grayscale; and determine the target Gamma register value of the display panel in the second binding grayscale based on the target optical parameters of the second region in the second binding grayscale and the measured optical parameters of the second region in the second binding grayscale.

[0006] According to another aspect of the present invention, a Gamma tuning system is provided, comprising a display panel, a processing device, and an optical device; The optical equipment is used to simultaneously acquire measured optical parameters of at least two areas of the display panel; The processing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method provided in any embodiment of the present invention.

[0007] The technical solution of this invention sets at least two sampling points, such as a first region and a second region. Based on the target optical parameters of the first region at the first binding grayscale and the measured optical parameters of the first region at the first binding grayscale, the target Gamma register value of the display panel at the first binding grayscale is determined. At the same time, based on the target optical parameters of the second region at the second binding grayscale and the measured optical parameters of the second region at the second binding grayscale, the target Gamma register value of the display panel at the second binding grayscale is determined. This allows for the parallel debugging of at least two debugging nodes to be completed in parallel within one debugging cycle using at least two sampling areas, thereby significantly reducing the total debugging time of a single chip and effectively improving the debugging efficiency of a single chip.

[0008] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a flowchart illustrating a Gamma debugging method provided in an embodiment of the present invention; Figure 2 This is a flowchart illustrating another Gamma debugging method provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention; Figure 4 This is a flowchart illustrating another Gamma debugging method provided in an embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the specific process of a Gamma debugging method provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention; Figure 7 This is a flowchart illustrating another Gamma debugging method provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of a Gamma debugging system provided in an embodiment of the present invention. Detailed Implementation

[0011] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0012] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0013] It should be noted that the terms "first," "second," "target," "measured," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0014] During the gamma calibration process before product shipment, optical parameters need to be calibrated for different refresh rates, brightness levels, and grayscale levels. Typically, this involves selecting a subset of bound grayscale levels from 0 to 255 and calibrating the gamma register values ​​one by one, according to changes in refresh rate and brightness level, before burning the values ​​into the product via OTP (One-Time Programmable). However, the calibration parameters such as refresh rate, brightness level, and bound grayscale levels result in a large workload for calibration. Existing methods usually select a single sampling point in the product for sampling and calibration, forcing the calibration process to be serial (each calibration can only change one calibration parameter; for example, at the same refresh rate and brightness level, multiple bound grayscale samples are sampled and calibrated sequentially, then keeping the refresh rate constant, changing the brightness level, and so on, until all combinations of calibration parameters are sampled and calibrated). This leads to long single-chip calibration times and low calibration efficiency.

[0015] For example, if the debugging parameters include K refresh rates, N brightness levels, and M preset grayscale levels, there are a total of K×N×M debugging nodes for the Gamma debugging of a display panel (one combination corresponds to one debugging node). If only one sampling point is set using the existing method, a total of K×N×M debugging cycles are required. Assuming that the average time for each debugging cycle is t, the total debugging time for a single panel is K×N×M×t.

[0016] To address this issue, embodiments of the present invention provide a Gamma debugging method and system. The debugging method reduces single-chip debugging time and improves debugging efficiency by increasing sampling points. The technical solution of the embodiments of the present invention is described in detail below.

[0017] Figure 1 This is a flowchart illustrating a Gamma adjustment method provided in an embodiment of the present invention. This adjustment method can be executed by a processing device in the adjustment system and is suitable for Gamma adjustment of display panels before they leave the factory, thus improving the adjustment efficiency of a single display panel. Figure 1 As shown, the Gamma tuning method includes the following steps: S1. Obtain the target optical parameters of at least two regions in the display panel at different preset binding gray levels; the at least two regions include a first region and a second region, and the preset binding gray levels include a first binding gray level and a second binding gray level; the first binding gray level is different from the second binding gray level, and the first binding gray level and the second binding gray level are both smaller than the maximum gray level of the display panel.

[0018] The display panel includes multiple gray levels. The maximum gray level is the gray level with the highest value among all gray levels, while the preset bound gray levels are a representative subset of gray levels selected from all gray levels. The human eye's perception of light intensity is not linear but approximately logarithmic, being more sensitive to changes in detail in dark areas and relatively less sensitive to changes in brightness in bright areas. Therefore, when selecting preset bound gray levels, a larger number of low-to-medium gray levels and a smaller number of high gray levels can be selected to improve debugging efficiency while ensuring debugging accuracy.

[0019] For example, most display panels currently have gray levels divided into 0 to 255 gray levels. Taking this as an example, the maximum gray level mentioned above refers to 255 gray levels, and the preset bound gray levels refer to several gray levels selected from 0 to 255 gray levels.

[0020] It should be noted that the preset bound grayscale may or may not include the maximum grayscale. The specific number of grayscales corresponding to each preset bound grayscale can be selected by the user, and this embodiment of the invention does not limit this.

[0021] Optionally, the number of grayscale levels bound is preset to M, where 1 < M < 50.

[0022] Among them, the first bound gray level and the second bound gray level refer to two different gray levels among all preset bound gray levels. Both the first bound gray level and the second bound gray level are smaller than the maximum gray level.

[0023] In this embodiment, a region is used as a sampling point. By obtaining the target optical parameters under different preset binding gray levels for different regions, it can be used for subsequent Gamma adjustment under different preset binding gray levels for different sampling points (see S2~S3 for details).

[0024] For example, when the display panel includes two sampling points, such as a first region and a second region, the above-mentioned acquisition of target optical parameters of at least two regions in the display panel at different preset binding gray levels specifically means acquiring the target optical parameters of the first region at the first binding gray level, and simultaneously acquiring the target optical parameters of the second region at the second binding gray level. In this way, within a debugging cycle, the first region can be used for sampling and debugging at the first binding gray level, while the second region can be used for sampling and debugging at the second binding gray level. Parallel debugging of two debugging nodes can be achieved within the same time period (one debugging cycle), thereby effectively shortening the single-chip debugging time and improving debugging efficiency.

[0025] The following section, combining S2 and S3, provides a detailed explanation of the Gamma tuning method.

[0026] S2. Simultaneously acquire the measured optical parameters of the first region under the first binding grayscale and the measured optical parameters of the second region under the second binding grayscale.

[0027] S3. Determine the target Gamma register value of the display panel in the first binding grayscale based on the target optical parameters of the first region in the first binding grayscale and the measured optical parameters of the first region in the first binding grayscale; and determine the target Gamma register value of the display panel in the second binding grayscale based on the target optical parameters of the second region in the second binding grayscale and the measured optical parameters of the second region in the second binding grayscale.

[0028] Here, the target optical parameter corresponding to a preset bound grayscale refers to the target value that the actual optical parameter should achieve under that preset bound grayscale. The measured optical parameter, on the other hand, refers to the optical parameter obtained through actual measurement.

[0029] Specifically, optical parameters include luminance and chromaticity. The core objective of Gamma calibration is the calibration of luminance and chromaticity. The Gamma register value determines the output voltage of the driver chip. By correcting the Gamma register value under the preset bound grayscale, and then using this as a reference to modify the voltage mapping table in the Gamma register, the grayscale-luminance curve is adjusted to conform to the target Gamma curve, thus achieving luminance calibration. Simultaneously, chromaticity calibration must also be performed on the luminance calibration device to ensure that the color coordinates under each grayscale meet the product specifications and avoid color shift.

[0030] For example, taking a display panel that includes R, G, and B sub-pixels, for any preset bound grayscale, the Gamma register values ​​corresponding to R, G, and B are adjusted collaboratively to make the measured brightness reach the target brightness, while ensuring that the colorimetry meets the product specifications (no color deviation).

[0031] Specifically, the target optical parameters corresponding to the preset grayscale levels can be determined based on the target optical parameters corresponding to the maximum grayscale level. For brightness, the target brightness corresponding to the maximum grayscale level is determined according to the product brightness specifications, while the target brightness corresponding to other grayscale levels can be calculated using the Gamma function. For chromaticity, the chromaticity specifications are consistent across different grayscale levels.

[0032] The initial measurement of the optical parameters is based on the output driving voltage of the theoretical Gamma register value corresponding to the preset bound grayscale, which drives the screen to display the corresponding grayscale image, and then the measurement is obtained using optical equipment. Theoretically, the measured optical parameters generated based on the theoretical Gamma register value are consistent with the target optical parameters. However, in reality, due to differences in the screen, there are often certain differences between the measured optical parameters and the target optical parameters. Therefore, further adjustments / corrections are needed based on the theoretical Gamma register value.

[0033] For a preset bound grayscale, the Gamma adjustment process is as follows: obtain the target optical parameters corresponding to the preset bound grayscale, obtain the measured optical parameters of the sampling points through optical equipment (such as a photometer), and adjust the current Gamma register value according to the difference between the measured optical parameters and the target optical parameters. If the difference is too large, the current Gamma register value is adjusted until the actual optical parameters are as close as possible to the target optical parameters, and the corrected Gamma register value is obtained, which is the target Gamma register value mentioned above (OTP burning is performed after the entire chip is fully adjusted).

[0034] By increasing the number of sampling points and simultaneously performing gamma adjustment of different preset bound gray levels at different sampling points, the embodiments of the present invention can effectively shorten the debugging time of a single chip and improve the debugging efficiency.

[0035] For example, Figure 2 This is a flowchart illustrating another gamma tuning method provided in an embodiment of the present invention, as shown below. Figure 2 As shown, when the display panel uses the first region and the second region as sampling points, the gamma adjustment method may include the following steps: S110. Obtain the target optical parameters of the first region in the display panel under the first binding grayscale, and the target optical parameters of the second region under the second preset binding grayscale.

[0036] S210: Control the first region and the second region to operate at the same refresh rate and the same brightness level, and simultaneously acquire the measured optical parameters of the first region at the first bound gray level and the measured optical parameters of the second region at the second bound gray level.

[0037] The refresh rate refers to the number of times the screen updates its content per second, determining the smoothness of dynamic images. Brightness level is a different concept from the brightness corresponding to a grayscale level; brightness level refers to the overall brightness of the display. For example, in the display's automatic brightness adjustment mode, the brightness level is usually related to the ambient brightness. When the environment is dark, the display's brightness level is lower, and when the environment is bright, the display's brightness level is higher. Different brightness levels result in different maximum brightness (255 grayscale brightness); more specifically, the brightness of the same grayscale level differs at different brightness levels. Different target Gamma curves are used at different refresh rates and brightness levels. Therefore, the measured optical parameters of the first and second regions at different preset grayscale levels are obtained at the same refresh rate and the same brightness level. Similarly, the target optical parameters of the first and second regions at different preset grayscale levels are also obtained at the same refresh rate and the same brightness level. Specifically, the refresh rate and brightness level are the same in S10 and S20. Within a debugging cycle, at a specific refresh rate and brightness level, the target optical parameters and measured optical parameters of different regions at different preset grayscale levels are obtained.

[0038] S310. If the difference between the target optical parameters of the first region under the first binding gray level and the measured optical parameters of the first region under the first binding gray level exceeds a first threshold, change the Gamma register value of the first region under the first binding gray level; if the difference between the target optical parameters of the second region under the second binding gray level and the measured optical parameters of the second region under the second binding gray level exceeds a second threshold, change the Gamma register value of the second region under the second binding gray level.

[0039] S320, simultaneously acquire the measured optical parameters of the first region under the first binding grayscale and the measured optical parameters of the second region under the second binding grayscale.

[0040] S330: Until the difference between the target optical parameter of the first region at the first binding grayscale and the measured optical parameter of the first region at the first binding grayscale does not exceed a first threshold, the current Gamma register value of the first region is used as the target Gamma register value of the display panel at the first binding grayscale; and until the difference between the target optical parameter of the second region at the second binding grayscale and the measured optical parameter of the second region at the second binding grayscale does not exceed a second threshold, the current Gamma register value of the second region is used as the target Gamma register value of the display panel at the second binding grayscale.

[0041] Specifically, S310-S330 are further refinements of S3. In this embodiment, the first region and the second region serve as two sampling points. During one debugging cycle, the first region can be driven to display the first bound grayscale image based on the theoretical Gamma register value of the first bound grayscale, and the second region can be driven to display the second bound grayscale image based on the theoretical Gamma register value of the second bound grayscale. This allows for the simultaneous acquisition of the measured optical parameters of the first region under the first bound grayscale and the measured optical parameters of the second region under the second bound grayscale. Simultaneously, the Gamma register values ​​of the first and second bound grayscales are corrected to obtain the target Gamma register value corresponding to the first and second bound grayscales, thus completing one debugging cycle.

[0042] In summary, S1-S3 (S110-S330) represents the process steps of one debugging cycle. Next, the debugging parameters are changed, and steps S1-S3 (S110-S330) are repeated to continue the Gamma debugging of other debugging nodes until the single-chip debugging is completed.

[0043] Optionally, the difference between the target optical parameters and the measured optical parameters is specifically defined as the difference value, with the first threshold and the second threshold being the same. This simplifies the computation.

[0044] Based on the above explanation, the technical solution of this invention, when two regions (such as a first region and a second region) are set as sampling points, different preset bound grayscale images can be displayed in the first and second regions. Simultaneously, Gamma adjustment is performed on both grayscale levels. For adjustment parameters including K refresh rates, N brightness levels, and M preset bound grayscale levels, theoretically, the total debugging time for a single chip is halved (K×N×M×t / 2). When three regions are set as sampling points, the total debugging time for a single chip can be reduced to one-third of the original (K×N×M×t / 3), thereby effectively shortening the debugging time for a single chip and improving debugging efficiency.

[0045] For example, Figure 3 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, such as... Figure 3 As shown, taking the first region Q1 and the second region Q2 as sampling points as an example, assuming the preset grayscale levels are G1, G2, G3, G4, G5, G6, G7, G8, G9, G 10(The subscripts only represent the sequence number and not the actual grayscale value.) Therefore, at the same refresh rate and brightness level, grayscale G1 can be displayed in the first area, and grayscale G2 in the second area. G1 and G2 are debugged in parallel during the first debugging cycle. Then, grayscale G3 is displayed in the first area, and grayscale G4 in the second area. This process is repeated in the second debugging cycle, and so on, until all preset bound grayscale values ​​at the current refresh rate and brightness level are debugged. Then, the frequency or brightness level is adjusted, and the above steps are repeated until all debugging nodes are debugged. Because two debugging nodes are debugged in parallel within one cycle, the debugging time for a single chip can be halved.

[0046] In summary, compared with existing solutions, this application sets up at least two sampling areas and uses these sampling areas to complete the parallel debugging of at least two debugging nodes in one debugging cycle (without increasing the time consumption of one cycle), thereby reducing the total number of debugging cycles for a single chip by a factor of two, and thus reducing the total debugging time for a single chip by a factor of two, effectively improving the debugging efficiency of a single chip.

[0047] Furthermore, the study found that when increasing the number of sampling points, the measured optical parameters (brightness and chromaticity) of different sampling points will differ due to product uniformity issues. This leads to differences in the calibration results of different sampling points, resulting in inconsistent Gamma correction results for each gray level, which urgently needs improvement.

[0048] For example, refer to Figure 3Suppose that due to product uniformity, the brightness of the second region is inherently higher than that of the first region. Thus, at the same refresh rate and brightness level, to achieve a target optical parameter (such as target brightness) at a certain grayscale level (e.g., 255 grayscale), a corrected first Gamma value is obtained by comparing the measured optical parameters (such as measured brightness) of the first region with the target optical parameters (such as target brightness). Similarly, a corrected second Gamma value is obtained by comparing the measured optical parameters (such as measured brightness) of the second region with the target optical parameters (such as target brightness). It will be found that the second Gamma register value is smaller than the first Gamma register value. This is because the brightness of the second region is inherently higher than that of the first region. Therefore, the grayscale voltage converted from the smaller Gamma register value can drive the measured brightness of the second region to reach the target brightness, resulting in a mismatch (inequality) of the corrected Gamma register values ​​corresponding to different sampling points at the same grayscale level. Therefore, in this application, gamma adjustments are performed on two regions with different preset bound gray levels. If the two regions themselves have differences in brightness and chromaticity, and the target optical parameters at different preset bound gray levels are obtained based on the same standard, the final corrected gamma register values ​​for each gray level will be inconsistent. Under normal circumstances, the gamma register value should increase smoothly and non-linearly with increasing gray level. If the gamma register values ​​corresponding to adjacent gray levels show abnormalities such as abrupt changes, reverse jumps, or plateaus, they are considered inconsistent.

[0049] To address this issue, this application adopts the following approach.

[0050] For example, Figure 4 This is a flowchart illustrating another Gamma debugging method provided in an embodiment of the present invention, as shown below. Figure 4 As shown, taking the first and second regions as sampling points as an example, the Gamma debugging method may include the following steps: S11. Obtain the target optical parameters of the first region at the maximum gray level.

[0051] In a debugging cycle, the maximum grayscale specifically refers to the maximum grayscale level at a given refresh rate and brightness level. Specifically, the target optical parameters for the first region at the maximum grayscale can be obtained from the manufacturer's product specifications. For brightness, the target brightness at the maximum grayscale is the maximum brightness set by the user at the current refresh rate and brightness level. When the refresh rate and brightness level change, the maximum brightness also changes. For chroma, the chroma requirements are consistent across different grayscale levels, all requiring no color shift. Taking a display panel including RGB sub-pixels as an example, the target chroma (chroma specification requirements) limits the proportion of red (R) and green (G) light (the proportion of blue (B) light can be calculated using color coordinates).

[0052] S12. Simultaneously acquire the measured optical parameters of the first region at the maximum gray level and the measured optical parameters of the second region at the maximum gray level.

[0053] Specifically, at the same refresh rate and brightness level as in step S11, the measured optical parameters of the first region at the maximum grayscale and the second region at the maximum grayscale are simultaneously acquired using optical equipment (e.g., a photometer). The measured optical parameters of the first region at the maximum grayscale specifically include measured brightness and measured chromaticity, and the measured optical parameters of the second region at the maximum grayscale specifically include measured brightness and measured chromaticity.

[0054] S13. Based on the measured optical parameters of the first region at the maximum gray level, the measured optical parameters of the second region at the maximum gray level, and the target optical parameters of the first region at the maximum gray level, determine the target optical parameters of the second region at the maximum gray level.

[0055] This setup allows for adjustment of the target optical parameters in the second region at maximum grayscale, ensuring consistency in the corrected Gamma register values ​​obtained for both the first and second regions at maximum grayscale. Based on this, subsequent Gamma adjustments at different preset bound grayscales for the first and second regions can guarantee the continuity of the Gamma register values ​​across all grayscales, ensuring a smooth, non-linear increase in the Gamma register value as the grayscale increases.

[0056] Optionally, the target optical parameters include target brightness, and the measured optical parameters include measured brightness. The measured brightness of the first region at the maximum grayscale is... The measured brightness of the second region at the maximum grayscale is The target brightness in the first region at the maximum grayscale is The target brightness in the second region at the maximum grayscale is ,satisfy: .

[0057] Specifically, the ratio of the target brightness of the second region to that of the first region is equal to the ratio of the measured brightness of the second region to that of the first region, based on the measured brightness of the first region at its maximum grayscale. The measured brightness of the second region at the maximum grayscale is And the target brightness of the first region at the maximum grayscale is The target brightness of the second region at the maximum gray level was recalculated. It can determine the target brightness of the second region at the maximum grayscale. Linear correction is performed to ensure the consistency of Gamma adjustment results for the first and second regions at the same gray level, as well as the coherence of Gamma adjustment results for the first and second regions at different gray levels.

[0058] For example, suppose the brightness of the second region is inherently higher than that of the first region. If the target brightness of both the first and second regions at the maximum grayscale is set to a predetermined value of 100, then when sampling and adjusting using the first region, adjusting the Gamma register value to 10 will allow the measured brightness of the first region to reach the target brightness of 100. However, when sampling and adjusting using the second region, since the brightness of the second region is inherently higher than that of the first region, adjusting the Gamma register value to 9 will allow the measured brightness of the second region to reach the target brightness of 100. This results in inconsistent Gamma adjustment results for the same grayscale at the two sampling points. Subsequently, if the target brightness of other preset bound grayscales is determined using the same target brightness at the maximum grayscale, the difference in brightness between the first and second regions will lead to inconsistent Gamma adjustment results at different grayscales due to the inherent differences in brightness between the first and second regions.

[0059] In this embodiment, the target brightness of the second region at the maximum gray level is corrected based on the above formula. For example, the target brightness of the first region at the maximum gray level is still 100, and the target brightness of the second region at the maximum gray level is corrected to 105. Thus, when sampling and debugging using the first region, the Gamma register value can be adjusted to 10 to make the measured brightness of the first region reach the target brightness of 100. When sampling and debugging using the second region, the Gamma register value needs to be adjusted to 10 to make the measured brightness of the second region reach the corrected target brightness of 105. This ensures the consistency of the Gamma debugging results of the first region and the second region at the same gray level. For the second region, the target brightness at the preset bound gray level (such as the second bound gray level) can be determined based on the target brightness at the corrected maximum gray level, ensuring the continuity of the Gamma debugging results of the first region and the second region at different gray levels.

[0060] It should be noted that the values ​​listed in the above examples for target brightness and Gamma register values ​​only represent the relative magnitude of the same parameter, have no units, and do not represent actual values.

[0061] In addition, optionally, the target optical parameters include target chromaticity, and the measured optical parameters include measured chromaticity. The measured chromaticity of the first region at the maximum gray level is (x1, y1), and the measured chromaticity of the second region at the maximum gray level is (x2, y2). The target chromaticity of the first region at the maximum gray level is (xt1, yt1), and the target chromaticity of the second region at the maximum gray level is (xt2, yt2), satisfying: xt2=xt1+x1-x2; yt2=yt1+y1-y2.

[0062] Where x represents the proportion of red light, y represents the proportion of filtered light, and the proportion of blue light can be calculated from the color coordinates. When adjusting the Gamma register value to achieve the target brightness in a device, it is necessary to consider the proportions of different colors of light to ensure that the chromaticity meets the requirements and to avoid color shift.

[0063] Specifically, the chromaticity difference between the second region and the first region can be corrected according to a fixed difference value. When the second region is sampled and adjusted, the target chromaticity (xt2, yt2) under the corrected maximum gray level can be used as the standard to constrain the proportion of different colors of light in the preset bound gray level (such as the second bound gray level) during the Gamma adjustment process, so as to achieve the brightness calibration target of the measured brightness reaching the target brightness.

[0064] S14. Determine the target optical parameters of the first region at the first binding gray level based on the target optical parameters of the first region at the maximum gray level.

[0065] Specifically, the target brightness of the first region at the first bound grayscale is calculated based on the target brightness of the first region at the maximum grayscale. The target chromaticity of the first region at the first bound grayscale is consistent with the target chromaticity of the first region at the maximum grayscale.

[0066] S15. Based on the target optical parameters of the second region at the maximum gray level, determine the target optical parameters of the second region at the second binding gray level.

[0067] Specifically, the target brightness of the second region at the second bound grayscale is calculated based on the target brightness of the second region at the maximum grayscale after correction in S13. The target chromaticity of the second region at the second bound grayscale is consistent with the target chromaticity of the second region at the maximum grayscale after correction in S13.

[0068] For the calculation of the target brightness of any region at a preset bound grayscale, optionally, the target brightness of any region at the preset bound grayscale and the target brightness of that region at the maximum grayscale satisfy the following: ; in, For the region, the preset grayscale is Target brightness at that time The target brightness of the region at the maximum grayscale. The maximum gray level, .

[0069] This formula is the Gamma function mentioned above. It should be noted that the first and second regions correspond to... They are not necessarily the same. As mentioned above, when the first region and the second region have a brightness difference, the target brightness of the first region at the maximum grayscale is... Target brightness of the second region at maximum grayscale The difference lies in the target brightness of the first region at its maximum grayscale. Based on the product brightness specifications, the target brightness of the second area at the maximum grayscale is determined. The brightness correction is performed according to the brightness correction method in S13 above.

[0070] S2. Simultaneously acquire the measured optical parameters of the first region under the first binding grayscale and the measured optical parameters of the second region under the second binding grayscale.

[0071] S3. Determine the target Gamma register value of the display panel in the first binding grayscale based on the target optical parameters of the first region in the first binding grayscale and the measured optical parameters of the first region in the first binding grayscale; and determine the target Gamma register value of the display panel in the second binding grayscale based on the target optical parameters of the second region in the second binding grayscale and the measured optical parameters of the second region in the second binding grayscale.

[0072] The Gamma adjustment process for any region at the preset bound grayscale is described above and will not be repeated here. In this embodiment, by using the target optical parameters of one region at the maximum grayscale as a benchmark, the differences in the target optical parameters of other regions at the maximum grayscale are corrected. Then, the target brightness at the preset bound grayscale is determined based on the target brightness at the corrected maximum grayscale. This ensures that the differences between the measured optical parameters and the target optical parameters are consistent when different regions are Gamma adjusted at different preset bound grayscales. Consequently, the final corrected Gamma register value is consistent, and the Gamma register value increases smoothly and non-linearly with increasing grayscale, ensuring the reliability of the adjustment results.

[0073] Figure 5This is a schematic diagram of a specific process for a Gamma adjustment method provided in an embodiment of the present invention. Taking a display panel with two sampling points, point 1 and point 2, and the brightness of the two sampling points differs, and the adjustment parameters include two refresh rates (F1, F2, the numbers only represent the numbers), two brightness levels (DBV1, DBV2, the numbers only represent the numbers), and five preset bound grayscale levels (G1, G2, G3, G4, G5, the numbers only represent the numbers), with G5=255, the process of the Gamma adjustment method is briefly explained. For detailed steps, please refer to the description above.

[0074] like Figure 5 As shown, Gamma tuning includes the following process: S401. At refresh rate F1 and brightness level DBV1, perform Gamma register value correction for 255 grayscale based on point 1, and at the same time correct the target brightness (chromaticity) of point 2 at 255 grayscale.

[0075] For example, taking brightness as an example, the target brightness of the 255 grayscale at point 1 is Lvt1. After the initial measured brightness is compared with the target brightness, the theoretical Gamma register value is adjusted and corrected to the target Gamma register value. Then, the measured brightness Lv1 at point 1 is obtained that is close enough to the target brightness, thus completing the Gamma register value correction of the 255 grayscale.

[0076] Next, based on the target Gamma register value after 255 grayscale correction, the measured brightness Lv2 was obtained at point 2. The target brightness of point 2 at grayscale 255 was calculated after correction.

[0077] The correction for chromaticity differences is explained above and will not be repeated here.

[0078] S402. At refresh rate F1 and brightness level DBV1, perform Gamma register value correction for grayscale G1 based on point 1, and simultaneously perform Gamma register value correction for grayscale G2 based on point 2.

[0079] The correction process for the Gamma register value at any gray level is to determine the target brightness (chromaticity) of that gray level, obtain the measured brightness (chromaticity), and adjust the Gamma register value according to the difference between the two so that the final measured brightness (chromaticity) is as close as possible to the target brightness (chromaticity).

[0080] It should be noted that the target brightness (chromaticity) of point 1 in grayscale G1 is determined based on the target brightness (chromaticity) of point 1 in grayscale 255, and the target brightness (chromaticity) of point 2 in grayscale G2 is determined based on the corrected target brightness (chromaticity) of point 2 in grayscale 255.

[0081] S403. At refresh rate F1 and brightness level DBV1, perform Gamma register value correction for grayscale G3 based on point 1, and simultaneously perform Gamma register value correction for grayscale G4 based on point 2.

[0082] The only difference between steps S403 and S402 is that the next set of preset binding grayscale is changed for debugging, which will not be described in detail here.

[0083] Through steps S401-S403, the Gamma adjustment of all preset bound grayscale levels under refresh rate F1 and brightness level DBV2 was completed. Next, the refresh rate or brightness level will be adjusted to perform the next round of target brightness (chromaticity) correction for 255 grayscale levels and Gamma adjustment of each preset bound grayscale level.

[0084] S404. At refresh rate F1 and brightness level DBV2, perform Gamma register value correction for 255 grayscale based on point 1, and at the same time correct the target brightness (chromaticity) of point 2 at 255 grayscale.

[0085] S405. At refresh rate F1 and brightness level DBV2, perform Gamma register value correction for grayscale G1 based on point 1, and simultaneously perform Gamma register value correction for grayscale G2 based on point 2.

[0086] S406. At refresh rate F1 and brightness level DBV2, perform Gamma register value correction for grayscale G3 based on point 1, and simultaneously perform Gamma register value correction for grayscale G4 based on point 2.

[0087] S407. At refresh rate F2 and brightness level DBV1, perform Gamma register value correction for 255 grayscale based on point 1, and at the same time correct the target brightness (chromaticity) of point 2 at 255 grayscale.

[0088] S408. At refresh rate F2 and brightness level DBV1, perform Gamma register value correction for grayscale G1 based on point 1, and simultaneously perform Gamma register value correction for grayscale G2 based on point 2.

[0089] S409. At refresh rate F2 and brightness level DBV1, perform Gamma register value correction for grayscale G3 based on point 1, and simultaneously perform Gamma register value correction for grayscale G4 based on point 2.

[0090] S410. At refresh rate F2 and brightness level DBV2, perform Gamma register value correction for 255 grayscale based on point 1, and at the same time correct the target brightness (chromaticity) of point 2 at 255 grayscale.

[0091] S411. At refresh rate F2 and brightness level DBV2, perform Gamma register value correction for grayscale G1 based on point 1, and simultaneously perform Gamma register value correction for grayscale G2 based on point 2.

[0092] S412. At refresh rate F2 and brightness level DBV2, perform Gamma register value correction for grayscale G3 based on point 1, and simultaneously perform Gamma register value correction for grayscale G4 based on point 2.

[0093] With the same number of debugging nodes (K=2, N=2, M=5), if only one sampling point is used, the number of debugging cycles is 2×2×5=20. Using the technical solution of this application embodiment, through parallel debugging, the number of debugging cycles is reduced to 2×2×3=12, effectively reducing the debugging time per chip (the time to calculate the target brightness (chroma) of point 2 at 255 grayscale is negligible compared to the adjustment time of the Gamma register value). In the above example, the refresh rate, brightness level, and the number of preset bound grayscales are much smaller than the actual number. For cases with a large number of actual debugging nodes, the advantage of this application in reducing the debugging time per chip will be even more significant.

[0094] Based on the above example, optionally, when the preset bound grayscale includes 255 grayscale levels, the number of preset bound grayscale levels M = a × Q + 1. Here, Q represents the number of regions (sampling points), and a is a positive integer.

[0095] Specifically, when the refresh rate or brightness level changes, the target optical parameters of the maximum gray level change, requiring a readjustment of the 255 gray level Gamma and correction of color brightness differences in different areas at the maximum gray level. By setting the number of preset bound gray levels to an integer multiple of the number of areas plus one, after adjusting the maximum gray level, sampling points can be fully utilized for different bound gray levels in each adjustment cycle, avoiding the waste of sampling points.

[0096] In summary, the above embodiments, using two sampling points as an example, have provided a detailed description of the technical solution of the embodiments of the present invention. In other embodiments, a greater number of sampling points can be set to further improve debugging efficiency. Below, using three sampling points as an example, the technical solution of the embodiments of the present invention will be further briefly described.

[0097] For example, Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, such as... Figure 6As shown, optionally, at least two regions also include a third region Q3, meaning that the first region Q1, the second region Q2, and the third region Q3 serve as three sampling points, undergoing parallel Gamma adjustment for different preset bound grayscale levels. Correspondingly, the preset bound grayscale also includes a third bound grayscale, which differs from both the first and second bound grayscale levels, and is smaller than the maximum grayscale level. Within one adjustment cycle, the first region Q1 undergoes Gamma adjustment for the first bound grayscale, the second region Q2 undergoes Gamma adjustment for the second bound grayscale, and simultaneously, the third region Q3 undergoes Gamma adjustment for the third bound grayscale. This further reduces the single-chip adjustment time and improves adjustment efficiency.

[0098] Correspondingly, Figure 7 This is a flowchart illustrating another Gamma debugging method provided in an embodiment of the present invention, as shown below. Figure 7 As shown, when the display panel includes three sampling points, the Gamma tuning method may include the following steps: S101. Obtain the target optical parameters of the first region at the maximum gray level.

[0099] S102. Simultaneously acquire the measured optical parameters of the first region at the maximum gray level, the measured optical parameters of the second region at the maximum gray level, and the measured optical parameters of the third region at the maximum gray level.

[0100] S103. Based on the measured optical parameters of the first region at the maximum gray level, the measured optical parameters of the second region at the maximum gray level, and the target optical parameters of the first region at the maximum gray level, determine the target optical parameters of the second region at the maximum gray level.

[0101] This step corrects the target optical parameters of the second region at the maximum grayscale level, based on the brightness (chromaticity) difference between the first and second regions, using the target optical parameters of the first region at the maximum grayscale level as a benchmark. See the explanation in S13 for details.

[0102] S104. Based on the measured optical parameters of the first region at the maximum gray level, the measured optical parameters of the third region at the maximum gray level, and the target optical parameters of the first region at the maximum gray level, obtain the target optical parameters of the third region at the maximum gray level.

[0103] Similar to S103, step S104 corrects the target optical parameters of the third region at the maximum grayscale level based on the brightness (chromaticity) difference between the first and third regions, using the target optical parameters of the first region at the maximum grayscale level as a reference. Corrections for the target optical parameters of other regions at the maximum grayscale level are also based on the first region, which simplifies the algorithm and reduces computational load.

[0104] S105. Determine the target optical parameters of the first region at the first binding gray level based on the target optical parameters of the first region at the maximum gray level.

[0105] S106. Based on the target optical parameters of the second region at the maximum gray level, determine the target optical parameters of the second region at the second binding gray level.

[0106] S107. Based on the target optical parameters of the third region at the maximum gray level, determine the target optical parameters of the third region at the third binding gray level.

[0107] Specifically, for S105~S107, after determining the target optical parameters of each region at the maximum gray level, the determination of the target optical parameters of the preset binding gray level to be performed in each region can be determined. This can be understood with reference to S14 and S15 above, and will not be repeated here.

[0108] S108. Simultaneously acquire the measured optical parameters of the first region at the first gray level, the measured optical parameters of the second region at the second gray level, and the measured optical parameters of the third region at the third gray level.

[0109] S109. Based on the target optical parameters of the first region at the first bonding grayscale and the measured optical parameters of the first region at the first bonding grayscale, determine the target Gamma register value of the display panel at the first bonding grayscale; based on the target optical parameters of the second region at the second bonding grayscale and the measured optical parameters of the second region at the second bonding grayscale, determine the target Gamma register value of the display panel at the third bonding grayscale; based on the target optical parameters of the third region at the third bonding grayscale and the measured optical parameters of the third region at the third bonding grayscale, determine the target Gamma register value of the display panel at the third bonding grayscale.

[0110] For S108~S109, please refer to S2 and S3 above for a detailed understanding. The explanation will not be repeated here. The only difference is that the third region is used to correct the Gamma register value under the third binding grayscale.

[0111] Referring to the explanation above, when the number of sampling points is 3, and the preset bound grayscale includes 255 grayscale, the total number of preset bound grayscale can be an integer multiple of 3 plus 1 to ensure full utilization of the sampling points.

[0112] Reference Figure 3 The display panel includes multiple data lines S arranged along a first direction D1. Optionally, a first region Q1 and a second region Q2 are arranged along the first direction D1. Optionally, each region overlaps with the center line of the display panel in the extension direction of the data lines. In the central region of the display panel, several sampling points are selected along the arrangement direction of the data lines, which helps to reduce the differences between the sampling points.

[0113] Reference Figure 6 Optionally, the first region Q1, the second region Q2, and the third region Q3 are arranged along the first direction D1, with the first region Q1, serving as the reference point, located between the second region Q2 and the third region Q3. Using the middle first region as the reference point allows for symmetrical correction of the target optical parameters in other regions, which helps ensure the consistency of the debugging results.

[0114] Based on the same inventive concept, embodiments of the present invention also provide a Gamma debugging system. Figure 8 This is a schematic diagram of the structure of a Gamma debugging system provided in an embodiment of the present invention, as shown below. Figure 8 As shown, the Gamma adjustment system includes a display panel 100, a processing device 200, and an optical device 300; the optical device 300 is used to simultaneously acquire measured optical parameters of at least two areas of the display panel; the processing device 200 includes a memory 201, a processor 202, and a computer program stored in the memory and executable on the processor. When the processor 202 executes the computer program, it implements the Gamma adjustment method provided in any of the embodiments of the present invention, and thus has the same beneficial effects as the above-described adjustment method.

[0115] The optical device 300 can be a photometer. The processing device can be a computer with a processor and memory, which can acquire measured optical parameters of different areas of the display panel through the optical device 300, and process the debugging of at least two preset grayscale Gamma register values ​​in parallel within a debugging cycle, thereby improving debugging efficiency. After the entire chip is debugged, the mapping relationship between the debugged grayscale and the Gamma register values ​​can be programmed into the value driver chip to ensure that the subsequent driver chip drives the display panel to display images in accordance with the characteristics of human eye perception.

[0116] The type of memory 201 includes, but is not limited to, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above, and the embodiments of the present invention do not limit this.

[0117] The processor 202 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processors include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor performs the various methods described above, such as the Gamma debugging method.

[0118] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A Gamma tuning method, characterized in that, include: S1. Obtain target optical parameters for at least two regions in the display panel at different preset binding grayscale levels; the at least two regions include a first region and a second region, and the preset binding grayscale includes a first binding grayscale and a second binding grayscale; the first binding grayscale is different from the second binding grayscale, and the first binding grayscale and the second binding grayscale are both smaller than the maximum grayscale of the display panel. S2. Simultaneously acquire the measured optical parameters of the first region under the first binding grayscale and the measured optical parameters of the second region under the second binding grayscale; S3. Determine the target Gamma register value of the display panel in the first binding grayscale based on the target optical parameters of the first region in the first binding grayscale and the measured optical parameters of the first region in the first binding grayscale. And based on the target optical parameters of the second region under the second binding grayscale and the measured optical parameters of the second region under the second binding grayscale, the target Gamma register value of the display panel under the second binding grayscale is determined.

2. The Gamma tuning method according to claim 1, characterized in that, Step S1 includes: S11. Obtain the target optical parameters of the first region at the maximum gray level; S12. Simultaneously acquire the measured optical parameters of the first region at the maximum gray level and the measured optical parameters of the second region at the maximum gray level. S13. Based on the measured optical parameters of the first region at the maximum gray level, the measured optical parameters of the second region at the maximum gray level, and the target optical parameters of the first region at the maximum gray level, determine the target optical parameters of the second region at the maximum gray level.

3. The Gamma tuning method according to claim 2, characterized in that, After step S11, step S1 further includes: Based on the target optical parameters of the first region at the maximum grayscale, determine the target optical parameters of the first region at the first bound grayscale.

4. The Gamma tuning method according to claim 2, characterized in that, After determining the target optical parameters of the second region at the maximum grayscale, step S1 further includes: Based on the target optical parameters of the second region at the maximum grayscale, determine the target optical parameters of the second region at the second bound grayscale.

5. The Gamma tuning method according to claim 3 or 4, characterized in that, The target optical parameters include target brightness, and the target brightness of any region at the preset bound grayscale and the target brightness of that region at the maximum grayscale satisfy the following: ； in, The region is defined by the preset binding grayscale. Target brightness at that time The target brightness of the region at the maximum gray level. For the maximum gray level, .

6. The Gamma tuning method according to claim 2, characterized in that, The target optical parameters include target brightness, and the measured optical parameters include measured brightness. The measured brightness of the first region at the maximum grayscale is... The measured brightness of the second region at the maximum grayscale is The target brightness of the first region at the maximum grayscale is The target brightness of the second region at the maximum grayscale is ,satisfy: 。 7. The Gamma tuning method according to claim 2, characterized in that, The target optical parameters include target chromaticity, and the measured optical parameters include measured chromaticity. The measured chromaticity of the first region at the maximum grayscale is (x1, y1), the measured chromaticity of the second region at the maximum grayscale is (x2, y2), the target chromaticity of the first region at the maximum grayscale is (xt1, yt1), and the target chromaticity of the second region at the maximum grayscale is (xt2, yt2), satisfying: xt2 = xt1 + x1 - x2; yt2 = yt1 + y1 - y2.

8. The Gamma tuning method according to claim 1, characterized in that, Step S3 includes: If the difference between the target optical parameters of the first region under the first binding grayscale and the measured optical parameters of the first region under the first binding grayscale exceeds a first threshold, the Gamma register value of the first region under the first binding grayscale is changed; if the difference between the target optical parameters of the second region under the second binding grayscale and the measured optical parameters of the second region under the second binding grayscale exceeds a second threshold, the Gamma register value of the second region under the second binding grayscale is changed. The measured optical parameters of the first region under the first binding grayscale and the measured optical parameters of the second region under the second binding grayscale are obtained simultaneously again. Until the difference between the target optical parameter of the first region under the first binding grayscale and the measured optical parameter of the first region under the first binding grayscale does not exceed the first threshold, the current Gamma register value of the first region is taken as the target Gamma register value of the display panel under the first binding grayscale; and until the difference between the target optical parameter of the second region under the second binding grayscale and the measured optical parameter of the second region under the second binding grayscale does not exceed the second threshold, the current Gamma register value of the second region is taken as the target Gamma register value of the display panel under the second binding grayscale.

9. The Gamma tuning method according to claim 8, characterized in that, The difference is the difference value, and the first threshold is the same as the second threshold.

10. The Gamma tuning method according to claim 2, characterized in that, At least two of the regions also include a third region, and the preset binding grayscale also includes a third binding grayscale, which is different from the first binding grayscale and different from the second binding grayscale, and the third binding grayscale is smaller than the maximum grayscale; Step S12 includes: simultaneously acquiring the measured optical parameters of the first region at the maximum gray level, the measured optical parameters of the second region at the maximum gray level, and the measured optical parameters of the third region at the maximum gray level; The process after step S12 also includes: Based on the measured optical parameters of the first region at the maximum gray level, the measured optical parameters of the third region at the maximum gray level, and the target optical parameters of the first region at the maximum gray level, the target optical parameters of the third region at the maximum gray level are obtained.

11. The Gamma tuning method according to claim 1, characterized in that, Step S2 includes: controlling the first region and the second region to operate at the same refresh rate and the same brightness level, and simultaneously acquiring the measured optical parameters of the first region at the first bound grayscale and the measured optical parameters of the second region at the second bound grayscale.

12. The Gamma tuning method according to claim 1, characterized in that, The display panel includes multiple data lines arranged along a first direction; The first region and the second region are arranged along the first direction.

13. A Gamma tuning system, characterized in that, This includes display panels, processing equipment, and optical equipment; The optical device is used to simultaneously acquire measured optical parameters of at least two areas of the display panel; The processing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method as described in any one of claims 1-12.

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