CN114333722A - Debugging method and debugging equipment for display panel - Google Patents
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Abstract
The application discloses a debugging method and debugging equipment of a display panel, wherein the debugging method of the display panel comprises the following steps: acquiring the display brightness of each sub-pixel of a panel to be debugged; calculating the brightness difference value of the display brightness of each sub-pixel of the panel to be debugged and the standard display brightness; calculating the standard deviation value of the panel to be debugged by using the brightness difference value of each sub-pixel; judging whether the standard deviation value is greater than a preset deviation value; and if the standard deviation value is larger than the preset deviation value, adjusting the display brightness of the sub-pixel. By the method, the problems of uneven brightness and darkness of the display panel are solved.
Description
Technical Field
The invention relates to the field of display panels, in particular to a debugging method and debugging equipment of a display panel.
Background
With the development of Display technology, flat panel Display devices such as Liquid Crystal Displays (LCDs) have advantages of high image quality, power saving, thin body, and wide application range, and thus are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and become the mainstream of Display devices.
Most of the existing liquid crystal displays are backlight liquid crystal displays, which include a housing, a liquid crystal panel disposed in the housing, and a backlight module disposed in the housing. Generally, a liquid crystal panel is composed of a Color Filter (CF) substrate, a thin film transistor array substrate (TFT array substrate), and a liquid crystal layer (liquid crystal layer) filled between the two substrates, and the liquid crystal panel operates by applying a driving voltage to the CF substrate and the TFT substrate to control the rotation of liquid crystal molecules of the liquid crystal layer, control the output of light, and refract light from a backlight module to generate a picture. Generally, a process for forming a liquid crystal display panel generally includes: array substrate (Array) process (thin film, photolithography, etching and stripping), color filter substrate process, and Cell (TFT substrate and CF substrate bonding).
After the liquid crystal display panel is manufactured, due to the limitation of a manufacturing process, each liquid crystal display panel can generate the phenomenon of uneven brightness (gray scale mura) in different degrees, in order to compensate the gray scale mura of the liquid crystal display panel, the liquid crystal display panel shot by a camera in the prior art displays pictures under different gray scales, gray scale compensation data is obtained according to the brightness difference of the display pictures and is stored in a Flash memory (Flash), a time schedule controller (TconIC) is electrified to compensate the gray scale data to be displayed through the gray scale compensation data, and then the compensated gray scale data is output to be displayed on the pictures, so that the brightness uniformity and the darkness uniformity of the liquid crystal display panel are improved. However, in the prior art, whether the display panel has uneven brightness or not is judged by human eyes, the recognition degree of human eyes is not high enough, and the display panel still has uneven brightness due to wiping errors even after long-time judgment.
Disclosure of Invention
The technical problem mainly solved by the application is to provide a debugging method and debugging equipment for a display panel, so as to solve the problems of uneven brightness and the like of the display panel.
In order to solve the above problem, the present application provides a method for debugging a display panel, where the method for debugging a display panel includes: acquiring the display brightness of each sub-pixel of a panel to be debugged; calculating the brightness difference value between the display brightness of each sub-pixel of the panel to be debugged and the standard display brightness; calculating the standard deviation value of the panel to be debugged by using the brightness difference value of each sub-pixel; judging whether the standard deviation is larger than a preset deviation value or not; and if the standard deviation value is larger than a preset deviation value, adjusting the display brightness of the sub-pixel.
Therefore, the display brightness of each sub-pixel is obtained, then the brightness difference value between each sub-pixel and the standard display brightness is obtained according to the display brightness of each sub-pixel, and then the display brightness of each sub-pixel is adjusted according to the rule of the brightness difference value of each sub-pixel.
Preferably, the step of calculating a standard deviation value of the panel to be debugged by using the difference value of each sub-pixel includes: using formulas
Calculating the standard deviation value; wherein N is the sub-pixel number of the panel to be debugged, XiThe luminance difference value between the display luminance of the ith sub-pixel and the standard display luminance,
is the average luminance difference of all the sub-pixels.
Therefore, the standard deviation value of the display brightness of each sub-pixel in the panel to be debugged and the average display brightness of the panel to be debugged is obtained through formula calculation, if the standard deviation value is large, the problem that the brightness and darkness of the panel to be debugged are uneven is solved, the brightness and darkness of the panel to be debugged need to be uniformly adjusted, and if the standard deviation value is small, the brightness and darkness of the panel to be debugged are relatively uniform, and the brightness and darkness uniformity adjustment is not needed.
Preferably, the adjusting the display luminance of the sub-pixel includes: and adjusting the clock signals of the sub-pixels by using a time schedule controller so as to adjust the charging time of the sub-pixels.
Therefore, the sub-pixels to be adjusted are adjusted through the time schedule controller, so that the sub-pixels to be adjusted achieve the average display brightness.
Preferably, if the display brightness of the sub-pixel is lower than the average brightness of the panel to be debugged, the charging time of the sub-pixel is increased.
Therefore, the display brightness of the debugging panel is uniform by debugging the sub-pixel displaying the dark.
Preferably, if the difference between the luminance difference value of the odd line and the luminance difference value of the even line of the panel to be debugged is large, the width of the clock pulse of the odd line/the even line is adjusted by the timing controller to adjust the charging time of the odd line/the even line.
Therefore, if the display rule of bright and dark lines appears on the panel to be debugged, the charging time of the sub-pixel row is increased by adjusting the sub-pixel row displaying darker, specifically, by increasing the clock pulse width of the row to be adjusted.
Preferably, if the difference between the luminance difference value of the odd row and the luminance difference value of the even row of the panel to be debugged is large, overcharging the darker odd row/even row to increase the charging time of the odd row/even row to increase the display luminance of the sub-pixel row.
Therefore, in another embodiment, the charging time of the sub-pixel row is increased by overcharging to increase the display brightness of the sub-pixel row.
Preferably, after the step of adjusting the display luminance of the sub-pixels, the method includes: selecting a target matrix and obtaining the average display brightness of the target matrix; acquiring a difference value between the average display brightness and the standard display brightness; judging whether the difference value is larger than a preset difference value or not; and if so, improving the display brightness of the sub-pixels in the target matrix.
Therefore, the display brightness of the panel to be debugged is compared with the standard display brightness through the partitioning block, and if the difference is larger, the display brightness of the panel to be debugged is adjusted, so that the panel to be debugged reaches the standard display brightness.
Preferably, the step of increasing the display brightness of the sub-pixels in the target matrix comprises: sequentially adjusting the display brightness of all the sub-pixels of the target matrix until the display brightness of all the sub-pixels reaches the standard display brightness; after the step of increasing the display brightness of the sub-pixels in the target matrix, the method includes: and selecting a next target matrix, and debugging the next target matrix.
Therefore, the panel to be debugged is divided into a plurality of target matrixes, and the target matrixes are respectively adjusted, specifically, sub-pixels in the target matrixes are adjusted to enable the target matrixes to reach standard brightness, so that the brightness of the panel to be debugged is adjusted.
Preferably, after the step of determining whether the standard deviation value is greater than a preset deviation value, the method further includes: and if the standard deviation value is not larger than the preset deviation value, not adjusting the display brightness of the sub-pixel.
Therefore, whether to adjust the sub-pixels is determined by the standard deviation value.
In order to solve the above problem, the present application further provides a debugging device of a display panel, including: the acquisition unit is used for acquiring the display brightness of each sub-pixel of the panel to be debugged; the first calculation unit is used for calculating the brightness difference value of the display brightness of each sub-pixel of the panel to be debugged and the standard display brightness; the second calculation unit is used for calculating the standard deviation value of the panel to be debugged by using the brightness difference value of each sub-pixel; the judging unit is used for judging whether the standard deviation value is greater than a preset deviation value or not; and the debugging unit is used for adjusting the display brightness of the sub-pixels when the standard deviation value is greater than a preset deviation value.
Therefore, the debugging device adjusts the display brightness of the panel to be debugged through the debugging unit.
The beneficial effect of this application is: the method comprises the steps of obtaining the display brightness of each sub-pixel of a panel to be debugged through a camera, calculating the brightness difference value between the display brightness of each sub-pixel of the panel to be debugged and the standard display brightness, calculating the standard deviation value of the panel to be debugged by using the calculated brightness difference value of each sub-pixel, judging whether the standard deviation is larger than a preset deviation value or not, and if the standard deviation value is larger than the preset deviation value, adjusting the display brightness of the sub-pixel. By the judging method, the display brightness of the sub-pixels is acquired by the camera, the accuracy and the recognition of the minimum unit are improved, and each sub-pixel can be adjusted to solve the problems of uneven brightness and the like of the display panel.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flowchart illustrating an embodiment of a display panel debugging method according to the present application;
FIG. 2 is a flowchart illustrating one embodiment of step S15 of FIG. 1;
fig. 3 is a schematic structural diagram of an embodiment of a display panel debugging device according to the present application.
31 an acquisition unit; 32 a first calculation unit; 33 a second calculation unit; 34 a judging unit; 35 debug unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating an embodiment of a display panel debugging method according to the present application. As shown in fig. 1, includes:
step S11: and acquiring the display brightness of each sub-pixel of the panel to be debugged.
Specifically, the display brightness of each sub-pixel of the panel to be debugged is acquired by a camera, where the camera is an optical photographing instrument, and the shooting precision of the camera in this embodiment may be accurate to the display brightness of the sub-pixel.
In the embodiment, the display image of the panel to be debugged is taken by the optical photographing apparatus to obtain the display brightness of each sub-pixel of the panel to be debugged. In one embodiment, the acquisition is performed in units of rows, such as the first acquisition of the display brightness of the first row, the second acquisition of the display brightness of the second row, until the last row of display brightness is acquired.
In the present embodiment, the display luminance is expressed by a gray scale value. Specifically, the display brightness of 0 to 255 gray scales is established by taking white as a standard.
In this embodiment, after each sub-pixel of the image to be debugged is acquired, establishing a sub-pixel coordinate table is further included. Specifically, for example, the first row and the first column are coordinates (1, 1), the first row and the second column are coordinates (1, 2), and a coordinate table is sequentially created, in this embodiment, the number of the sub-pixels is 1920 × 1080.
Step S12: and calculating the brightness difference value of the display brightness of each sub-pixel of the panel to be debugged and the standard display brightness.
In this embodiment, after the gray-scale value of each sub-pixel of the image to be debugged, which is captured by the panel to be debugged, is obtained, the difference between the gray-scale value of each sub-pixel of the image to be debugged and the gray-scale value of the standard display brightness is calculated, and then the difference is filled in the sub-pixel coordinate table. Specifically, the difference between the luminance grayscale value of the sub-pixel in the first row and the first column and the grayscale value of the standard display luminance is filled into the table in the first row and the first column, the difference between the luminance grayscale value of the sub-pixel in the second row and the second column and the grayscale value of the standard display luminance is filled into the table in the second row and the second column, and so on, and the display luminance difference table of each sub-pixel is obtained. Specifically, the display luminance difference table is shown in table 1.
TABLE 1 Difference between display brightness of panel to be adjusted and standard display brightness
| 1△1 | 1△2 | ...... | 1△1919 | 1△1920 |
| ...... | ...... | |||
| 1080△1 | 1080△2 | 1080△1919 | 1080△1920 |
In one embodiment, the standard display brightness may be one of gray levels 0-255. In another embodiment, the standard display brightness may include a plurality of standard display brightness tables, each display brightness in the tables corresponds to the standard display brightness of each sub-pixel of the panel to be debugged, and in this embodiment, the difference value table is established according to the difference value between the display brightness of each sub-pixel and the standard display brightness of each sub-pixel. The number of standard display luminances is not limited herein.
Step S13: and calculating the standard deviation value of the panel to be debugged by using the brightness difference value of each sub-pixel.
The brightness difference value is the brightness difference value between the display brightness of each sub-pixel of the panel to be debugged and the standard display brightness.
Specifically, the standard deviation value of the display brightness of the panel to be debugged is calculated according to the following formula:
wherein N is the number of sub-pixels of the panel to be debugged; xiThe luminance difference value of the display luminance of the ith sub-pixel and the standard display luminance;
the average luminance difference value of all the sub-pixels, i.e. the luminance difference value between the display luminance of the average sub-pixel and the standard display luminance.
In this embodiment, the standard deviation value S is used to measure the degree of deviation of the display brightness of each sub-pixel of the panel to be debugged from the average display brightness, where the smaller the standard deviation value is, the less the display brightness of each sub-pixel deviates from the average display brightness, and the display brightness of the panel to be debugged is relatively uniform; the larger the standard deviation value is, the more the display brightness of each sub-pixel deviates from the average display brightness, the uneven brightness and darkness of the panel to be debugged appears, and debugging is needed.
In this embodiment, a preset deviation value is set, and when the standard deviation value S is greater than the preset deviation value, the panel to be debugged is debugged. The preset deviation value can be set according to actual requirements. In an embodiment, the preset deviation value can be set to be multiple according to actual requirements so as to judge which phenomenon of uneven brightness and darkness display occurs, and adjustment can be conveniently performed according to the actual requirements. The phenomenon of uneven display of light and dark comprises the appearance of light and dark lines, insufficient charging of a far end and the like.
Step S14: and judging whether the standard deviation value is larger than a preset deviation value.
If the standard deviation value is greater than the predetermined deviation value, go to step S15: adjusting the display brightness of the sub-pixels of the panel to be debugged; if the standard deviation value is not greater than the predetermined deviation value, go to step S16: the display brightness of the sub-pixels is not adjusted.
Step S15: the display brightness of the sub-pixels is adjusted.
Step S16: the display brightness of the sub-pixels is not adjusted.
The method specifically includes adjusting the display brightness of the sub-pixel to be debugged of the panel to be debugged, and also includes adjusting the display brightness of each sub-pixel of the panel to be debugged, which is not limited herein.
In the present embodiment, the timing controller is used to adjust the clock signal of the sub-pixel to adjust the charging time of the sub-pixel. Specifically, if the display brightness of a certain sub-pixel is lower than the average brightness of the panel to be debugged, the charging time of the certain sub-pixel is increased, so that the display brightness of the certain sub-pixel is increased.
In one embodiment, if the display brightness in table 1 is analyzed by a PC (intelligent terminal), and the display brightness at the near end of the panel to be debugged is much larger than that at the far end, the clock signal output of the timing controller is adjusted. Specifically, the charging time of the remote sub-pixel is increased by extending the clock signal of the remote. In this embodiment, it is determined whether the sub-pixels of the panel to be debugged need to be adjusted or not by the standard deviation S, if so, the brightness difference of the table 1 is analyzed by the PC, and if it is found that the display brightness gradually becomes dark from the near end to the far end, it is determined that the far end is insufficiently charged. The CLK (clock signal) at the far end is extended for the case where a far end under charge occurs.
In another embodiment, if the difference between the luminance difference values of the odd line and the even line of the panel to be debugged is found to be large, the width of the clock pulse of the odd line or the even line is adjusted by the timing controller to adjust the charging time of the odd line or the even line, so that the display luminance of the odd line and the display luminance of the even line are consistent. Specifically, when the display luminance of the even line is larger than that of the odd line, the width of CKL (clock pulse) of the odd line is increased to increase the charging time of the odd line, and when the display luminance of the odd line is larger than that of the even line, the width of CKL of the even line is increased to increase the charging time of the even line, thereby reducing the luminance difference between the odd line and the even line.
In another embodiment, if the difference between the brightness difference values of the odd line and the even line of the panel to be debugged is found to be large, the darker odd line or even line is overcharged to increase the charging time of the odd line or even line. Specifically, when the display luminance of the even line is greater than the display luminance of the odd line, the clock signal of the odd line is overcharged to increase the charging time of the odd line, and when the display luminance of the odd line is greater than the display luminance of the even line, the clock signal of the even line is overcharged to increase the charging time of the even line, thereby reducing the luminance difference between the odd line and the even line.
In this embodiment, after the adjusting the display brightness of the sub-pixel to be debugged, the data compensation is performed on the display brightness of the sub-pixel to be debugged according to the standard display brightness, so that the display brightness of the panel to be debugged reaches the standard display brightness. Referring to fig. 2, fig. 2 is a flowchart illustrating an embodiment of step S15 in fig. 1. As shown in fig. 2, the method specifically includes:
step S21: and selecting a target matrix and acquiring the average display brightness of the target matrix.
In this embodiment, a 3 × 3 target matrix is selected, and the average display brightness of the 3 × 3 target matrix is obtained. In other embodiments, other sizes of the object display matrix such as 4 × 4, 5 × 5, etc. may be selected, and are not limited herein.
Step S22: and acquiring the difference value between the average display brightness and the standard display brightness.
Specifically, the average display luminance of the target matrix is calculated, and the average display luminance is compared with the standard display luminance to obtain a difference therebetween.
Step S23: and judging whether the difference value is larger than a preset difference value or not.
If yes, go to step S24; if not, go to step S25.
The preset difference value can be adjusted according to actual requirements, and is not limited herein.
Step S24: the display brightness of the sub-pixels in the target matrix is increased.
Step S25: the sub-pixels of the target matrix are not adjusted.
In this embodiment, the method includes adjusting the display brightness of all the sub-pixels of the target matrix in sequence until the display brightness of all the sub-pixels in the target matrix reaches the standard display brightness.
In other embodiments, the method further comprises adjusting the sub-pixels with the lower average display brightness until the average display brightness in the target matrix reaches the standard display brightness.
The method also comprises the following steps: and when the average display brightness in the target matrix reaches the standard display brightness, selecting the next target matrix with the same size, and repeatedly executing the steps S21-S24 on the next target matrix until all target matrices of the panel to be debugged reach the standard display brightness, so that the average display brightness of the panel to be debugged reaches the standard display brightness.
The beneficial effect of this embodiment is: the remote charging that earlier exists through the standard deviation value adjustment of waiting to debug panel self is not enough, or when bright dark line scheduling problem appears, adjust corresponding sub-pixel, then treat the matrix piece of adjustment panel according to the difference with standard display brightness and adjust, thereby can contrast to every line display brightness, thereby classification handles, bright dark line appearing in the face of waiting to debug the panel, the not enough mura problem of remote charging, can carry out the fine tuning to whole panel subregion again, so that the panel of waiting to debug reaches standard display brightness.
The application also provides debugging equipment of the display panel. Specifically, please refer to fig. 3, wherein fig. 3 is a schematic structural diagram of an embodiment of a display panel debugging apparatus according to the present application. As shown in fig. 3, the display panel debugging apparatus includes: and an obtaining unit 31, configured to obtain display brightness of each sub-pixel of the device to be debugged. The first calculating unit 32 calculates a luminance difference between the display luminance of each sub-pixel of the panel to be debugged and the standard display luminance. The first calculating unit 32 further establishes a brightness difference table according to the coordinate position of each sub-pixel, so as to display the brightness difference between each sub-pixel and the standard brightness. The second calculating unit 33 calculates a standard deviation value of the panel to be debugged using the luminance difference value of each sub-pixel. And a judging unit 34 for judging whether the standard deviation value is greater than a preset deviation value. And the debugging unit 35 is used for adjusting the display brightness of the sub-pixels when the standard deviation value is greater than the preset deviation value.
The beneficial effect of this embodiment is: the method comprises the steps of calculating the brightness difference value between the display brightness of each sub-pixel of a panel to be debugged and standard display brightness by obtaining the display brightness of each sub-pixel of the panel to be debugged, calculating the standard deviation value of the panel to be debugged by using the calculated brightness difference value of each sub-pixel, judging whether the standard deviation is greater than a preset deviation value or not, and adjusting the display brightness of the sub-pixel if the standard deviation is greater than the preset deviation value. By the judging method, each sub-pixel can be adjusted to solve the problem of uneven brightness of the display panel.
The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.
Claims (10)
1. A debugging method of a display panel is characterized by comprising the following steps:
acquiring the display brightness of each sub-pixel of a panel to be debugged;
calculating the brightness difference value between the display brightness of each sub-pixel of the panel to be debugged and the standard display brightness;
calculating the standard deviation value of the panel to be debugged by using the brightness difference value of each sub-pixel;
judging whether the standard deviation value is larger than a preset deviation value or not;
and if the standard deviation value is larger than a preset deviation value, adjusting the display brightness of the sub-pixel.
2. The method as claimed in claim 1, wherein the step of calculating the standard deviation value of the panel to be debugged using the difference value of each of the sub-pixels comprises:
using formulas
Calculating the standard deviation value;
wherein N is the sub-pixel number of the panel to be debugged, XiThe luminance difference value between the display luminance of the ith sub-pixel and the standard display luminance,
is the average luminance difference of all the sub-pixels.
3. The method according to claim 1, wherein the step of adjusting the display brightness of the sub-pixels comprises:
and adjusting the clock signals of the sub-pixels by using a time schedule controller so as to adjust the charging time of the sub-pixels.
4. The debugging method of a display panel according to claim 3,
and if the display brightness of the sub-pixels is lower than the average brightness of the panel to be debugged, increasing the charging time of the sub-pixels.
5. The display panel debugging method of claim 3, wherein,
and if the difference between the brightness difference value of the odd row and the brightness difference value of the even row of the panel to be debugged is large, adjusting the width of the clock pulse of the odd row/the even row through a time schedule controller so as to adjust the charging time of the odd row/the even row.
6. The debugging method of a display panel according to claim 3,
and if the difference between the brightness difference value of the odd row and the brightness difference value of the even row of the panel to be debugged is large, overcharging the darker odd row/even row so as to increase the charging time of the odd row/even row.
7. The method for debugging a display panel according to claim 1, wherein the step of adjusting the display luminance of the sub-pixels is followed by the steps of:
selecting a target matrix and obtaining the average display brightness of the target matrix;
acquiring a difference value between the average display brightness and the standard display brightness;
judging whether the difference value is larger than a preset difference value or not;
and if so, improving the display brightness of the sub-pixels in the target matrix.
8. The method according to claim 7, wherein the step of increasing the display brightness of the sub-pixels in the target matrix comprises:
sequentially adjusting the display brightness of all the sub-pixels of the target matrix until the display brightness of all the sub-pixels reaches the standard display brightness;
after the step of increasing the display brightness of the sub-pixels in the target matrix, the method includes:
and selecting a next target matrix, and debugging the next target matrix.
9. The method as claimed in claim 1, further comprising, after the step of determining whether the standard deviation value is greater than a predetermined deviation value:
and if the standard deviation value is not larger than the preset deviation value, not adjusting the display brightness of the sub-pixel.
10. A debugging device of a display panel, comprising:
the acquisition unit is used for acquiring the display brightness of each sub-pixel of the panel to be debugged;
the first calculation unit is used for calculating the brightness difference value of the display brightness of each sub-pixel of the panel to be debugged and the standard display brightness;
the second calculation unit is used for calculating the standard deviation value of the panel to be debugged by using the brightness difference value of each sub-pixel;
the judging unit is used for judging whether the standard deviation value is greater than a preset deviation value or not;
and the debugging unit is used for adjusting the display brightness of the sub-pixels when the standard deviation value is greater than a preset deviation value.
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| CN115457905A (en) * | 2022-10-21 | 2022-12-09 | 深圳市升宏光电科技有限公司 | Adaptive dimming compensation method, device and system of LED display screen and electronic equipment |
| CN117079617A (en) * | 2023-10-12 | 2023-11-17 | 惠科股份有限公司 | Brightness adjusting method for display panel and display panel |
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