Burning process method for reducing brightness decay of LCM (Liquid Crystal Module) product burning white balance

Abstract

The invention relates to an LCM (liquid crystal module) product burning white balance brightness decay reduction burning process method, which controls brightness decay in the burning process through burning process improvement so as to ensure the product display effect. In large-scale production, the display effect of each device can be ensured to be as close as possible and the difference between batches can be reduced by burning the white balance parameters, and by using the process provided by the invention, the reduction of the product brightness in the white balance adjustment process can be reduced and the display effect can be optimized. The burning process is improved, so that in the burning process, brightness attenuation is controlled, the product display effect is guaranteed, badness caused by burning is controlled, production loss is reduced, and the production cost is reduced. After burning according to the process, the adjusted white point coordinates are relatively divergent, the adjusting range of the white point Y coordinates is small, the brightness attenuation can be controlled, and the brightness is made to meet the requirement specification.

Description

Technical Field

[0001] The present invention relates to a programming process method, in particular to a programming process method for programming white balance of an LCM product to reduce brightness attenuation, belonging to the technical field of liquid crystal displays. Background Art

[0002] LCM liquid crystal displays have replaced traditional CRT displays with their many advantages such as clear and delicate images, non-flickering, eye-friendly, radiation-free, low power consumption, and thinner and lighter, and are highly favored by consumers.

[0003] At different brightness levels, the white displayed on the screen of an LCM liquid crystal display may have a slight red, green, or blue tint, which can cause the display effect of the entire display screen to look less natural. Especially in VR or in-vehicle products, etc., since the human eye is relatively close to the lens (i.e., the display screen), the sensory requirements will be higher. In an LCM liquid crystal display, by adjusting the intensity ratio of the three colors of red, green, and blue, the screen can accurately reproduce the colors of the real world, especially in applications that require precise color display. The white balance adjustment technology in the prior art often results in too low brightness of the product after adjustment, thus not meeting the normal display requirements. Summary of the Invention

[0004] Aiming at the disadvantage that the white balance adjustment of the LCM liquid crystal display in the above-mentioned prior art will cause the brightness of the product to be too low, the present invention provides a programming process method for programming white balance of an LCM product to reduce brightness attenuation, which controls the brightness attenuation during the programming process through improving the programming process to ensure the display effect of the product.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a programming process method for programming white balance of an LCM product to reduce brightness attenuation, the method comprising the following steps:

[0006] Step S1, Start: The programming process program is started, and the display of the LCM screen is turned on, including: powering on the LCM screen, inputting initialization code, and lighting the backlight;

[0007] Step S2, First common electrode voltage adjustment: Confirm whether the jitter value of the common electrode voltage is less than or equal to 30 db. If FLK is greater than 30 db, directly exit, indicating that there is a problem with this LCM screen. If the condition FLK≤30 db is satisfied, continue to execute the next step;

[0008] Step S3, Confirm the gamma maximum voltage: Confirm the gamma maximum voltage of the LCM display screen;

[0009] Step S4, Write test code: Write test code to the LCM display screen;

[0010] Step S5, test the brightness of the white screen: Make the LCM display show a pure white screen, and use a detection tool to detect the brightness of the white screen. If the brightness of the white screen meets the requirements, continue to the next step; if not, exit.

[0011] Step S6, collect optical data: Collect 28 groups of optical data, and determine whether LV is greater than 480. When LV > 480, put the data into the DLL library. Among them, the target coordinate value of W is selected as (0.303, 0.039). If LV is less than or equal to 480, then determine whether the coordinates meet the conditions. If they meet, write them into the DLL library. If they do not meet, adjust them and then write them into the DLL library.

[0012] Step S7, DLL library adjustment: Make the first adjustment to the DLL library according to the values of the previous step.

[0013] Step S8, asymmetric gamma voltage adjustment: Write the asymmetric gamma code into the LCM display to perform asymmetric gamma voltage adjustment.

[0014] Step S9, second common electrode voltage adjustment: Confirm the following parameters of the common electrode voltage, FLK ≤ -30DB, G64 ≤ -43DB, G127 ≤ -43DB. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters meet the requirements, continue to the next step.

[0015] Step S10, test optical parameters: If the optical parameters meet the conditions, continue to the next step; if not, exit.

[0016] Step S11, test the optical parameters of the black screen and the white screen: If the conditions are met, continue to the next step; if not, exit.

[0017] Step S12, test the gamma curve: The gamma curve parameters include: 2.1 ≤ Y ≤ 2.3, ay ≤ 1.0, ab ≤ 1.0, r2 ≥ 0.99. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters meet the requirements, continue to the next step.

[0018] Step S13, test the UV optical value: The UV optical value parameters include: G255 - G32 ≤ 0.01(Δv), G31 - G23 ≤ 0.0125(Δv), G22 - G11 ≤ 0.04(Δv). If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters meet the requirements, continue to the next step.

[0019] Step S14, programming: Perform LCM program programming.

[0020] Step S15, test the optical parameters after burning: If the conditions are met, proceed to the next step; if not, exit.

[0021] Step S16, test the optical parameters of the black screen and white screen after burning: If the conditions are met, proceed to the next step; if not, exit.

[0022] Step S17, test the gamma curve after burning: If the conditions are met, proceed to the next step; if not, exit.

[0023] Step S18, test the UV optical value after burning: If the conditions are met, proceed to the next step; if not, exit.

[0024] Step S19, test the contrast ratio: If the condition contrast ratio≥400 does not hold, directly exit, indicating that there is a problem with the LCM screen after this burning; if the condition holds, proceed to the next step.

[0025] Step S20, test the gray screen jitter value: If the conditions are met, proceed to the next step; if not, exit.

[0026] Step S21, test whether it meets the standards: Test whether the burned LCM display screen meets the corresponding specification standards. Depending on the different specification standards, the satisfied conditions are also different. Among them, 400nit≤C specification≤415nit, 415nit≤B specification≤430nit, 430nit≤A specification≤600nit. If the conditions are met, it indicates that the burning is successful and the burning process ends; if the conditions are not met, directly exit, indicating that there is a problem with the LCM screen after this burning.

[0027] The technical solution adopted by the present invention to solve its technical problems further includes:

[0028] In the said step S5, if the brightness of the white screen is less than 400nit, directly exit, indicating that there is a problem with this LCM screen; if WLV≥400nit is satisfied, proceed to the next step.

[0029] In the said step S6, the coordinate conditions are 0.292 ≤ X ≤ 0.314 and 0.298 ≤ Y ≤ 0.320. If the conditions are met, enter the ONEGammam mode, without performing color coordinate adjustment, and directly write to the DLL library. If any of the aforementioned conditions is not satisfied, color coordinate adjustment is required. Among them, if 0.292 ≤ X ≤ 0.314, the target coordinate of X is directly written as the current coordinate value. If X < 0.292, the target coordinate of X is directly written as 0.292. If X > 0.314, the target coordinate of X is directly written as 0.314. If 0.298 ≤ Y ≤ 0.320, the target coordinate of Y is directly written as the current coordinate value. If Y < 0.298, the target coordinate of Y is directly written as 0.298. If Y > 0.320, the target coordinate of Y is directly written as 0.320. Write the adjusted coordinate value to the DLL library.

[0030] In the said step S10, the optical parameters tested are RGB and sRGB. Confirm the following parameters of the common electrode voltage: 0.627 ≤ Rx ≤ 0.657, 0.321 ≤ Ry ≤ 0.351, 0.281 ≤ Gx ≤ 0.311, 0.586 ≤ Gy ≤ 0.622, 0.139 ≤ Bx ≤ 0.169, 0.041 ≤ By ≤ 0.071, sRGB ≥ 95%. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all the parameters meet the requirements, continue to execute the next step.

[0031] In the said step S11, the optical parameters of the black screen and white screen tested include: 0.288 ≤ Wx ≤ 0.318, 0.294 ≤ Wy ≤ 0.324, 400 ≤ WLv ≤ 600, WOLv ≤ 1.2 nits. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all the parameters meet the requirements, continue to execute the next step;

[0032] In the said step S15, the optical parameters tested after burning are RGB and sRGB, including the following parameters: 0.627 ≤ Rx ≤ 0.657, 0.321 ≤ Ry ≤ 0.351, 0.281 ≤ Gx ≤ 0.311, 0.586 ≤ Gy ≤ 0.622, 0.139 ≤ Bx ≤ 0.169, 0.041 ≤ By ≤ 0.071, sRGB ≥ 95%. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this burned LCM screen. If all the parameters meet the requirements, continue to execute the next step.

[0033] In the step S16 described above, after programming, the optical parameters of the black screen and white screen during testing include: 0.288 ≤ Wx ≤ 0.318, 0.294 ≤ Wy ≤ 0.324, 400 ≤ WLv ≤ 600, WOLv ≤ 1.2 nits. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after this programming. If all parameters meet the requirements, continue to execute the next step.

[0034] In the step S17 described above, the gamma curve parameters after programming include: 2.1 ≤ Y ≤ 2.3, ay ≤ 1.0, ab ≤ 1.0, r2 ≥ 0.99. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after this programming. If all parameters meet the requirements, continue to execute the next step.

[0035] In the step S18 described above, the UV optical value parameters include: G255 - G32 ≤ 0.01 (Δv), G31 - G23 ≤ 0.0125 (Δv), G22 - G11 ≤ 0.04 (Δv). If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after this programming. If all parameters meet the requirements, continue to execute the next step.

[0036] In the step S20 described above, when testing the jitter value of the gray screen, the following three parameters need to be tested: flicher, G127, and G63. Among them, FLK ≤ -30 DB, G64 ≤ -43 DB, G127 ≤ -43 DB. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after this programming. If all parameters meet the requirements, continue to execute the next step.

[0037] The beneficial effects of the present invention are as follows: In large-scale production, by programming the white balance parameters, it can ensure that the display effects of each device are as close as possible, reduce the differences between batches. Using the process of the present invention can reduce the decrease in product brightness during the white balance adjustment process and optimize the display effect. The present invention improves through the programming process, thereby controlling the brightness attenuation during the programming process, ensuring the product display effect, and controlling the defects caused by programming, reducing production losses, and reducing production costs. When programming according to the process of the present invention, the adjusted white point coordinates are relatively divergent, the adjustment range of the white point Y coordinate is small, and the brightness attenuation can be controlled to make the brightness meet the required specifications.

[0038] The following will further illustrate the present invention in conjunction with the drawings and specific embodiments. Brief Description of the Drawings

[0039] Figure 1 It is the display effect diagram for different color temperatures.

[0040] Figure 2The display effect diagrams of the same picture under different color temperatures.

[0041] Figure 3 It is the flowchart of program burning in the prior art.

[0042] Figure 4 It is the flowchart of classified burning by testing optical brightness and white point coordinates through the program in the present invention.

[0043] Figure 5 It is the LV histogram in the prior art (i.e., before adjusting with the present invention).

[0044] Figure 6 It is the LV histogram after adjusting with the present invention.

[0045] Figure 7 It is the distribution diagram of white point coordinates in the prior art (i.e., before adjusting with the present invention).

[0046] Figure 8 It is the distribution diagram of white point coordinates after adjusting with the present invention.

[0047] Figure 9 It is the first part of the program flowchart of the present invention.

[0048] Figure 10 It is the second part of the program flowchart of the present invention.

[0049] Figure 11 It is the third part of the program flowchart of the present invention. Specific embodiments

[0050] This embodiment is the preferred embodiment of the present invention. All those with the same or similar principles and basic structures as this embodiment are within the protection scope of the present invention.

[0051] Please refer to Appendix Figure 1 to Appendix Figure 11 , The present invention mainly protects a burning process method for burning white balance to reduce brightness attenuation of an LCM product, which mainly includes the following process steps:

[0052] Step S1, Start: The burning process program starts, and the display of the LCM screen is turned on, including: powering on the LCM screen, inputting initialization codes, and lighting the backlight, etc.

[0053] Step S2, First Common Electrode Voltage (i.e., VCOM) Adjustment: Confirm whether the jitter value of the common electrode voltage is less than or equal to 30 db (i.e., FLK ≤ 30 db). If FLK is greater than 30 db, directly exit, indicating that there is a problem with this LCM screen. If the condition FLK ≤ 30 db is met, continue to the next step. Here, FLK is Flicker, which is the optical jitter value. The smaller the FLK value, the smaller the flicker degree and the better the display effect. In this embodiment, setting FLK ≤ 30 dB can effectively prevent users from experiencing problems such as eye fatigue, dryness, and vision decline when watching such a screen for a long time;

[0054] Step S3, Confirm Gamma Maximum Voltage: Confirm the gamma maximum voltage (i.e., Top-Voltage) of the LCM display screen, which is also the maximum value that the display integrated circuit (IC) of the display panel can provide corresponding to the data signal, and is also called the black state voltage;

[0055] Step S4, Write Test Code: Write test code to the LCM display screen;

[0056] Step S5, Test White Screen Brightness (i.e., W255-LV): Make the LCM display screen show a pure white screen, and detect the brightness of the white screen (i.e., WLV) through a detection tool. If the brightness of the white screen is less than 400 nit, directly exit, indicating that there is a problem with this LCM screen. If the condition WLV ≥ 400 nit is met, continue to the next step. Here, WLV is the white screen brightness. In this embodiment, setting the brightness ≥ 400 nit can ensure that in general indoor and outdoor dim environments, the screen content has sufficient brightness to be presented, making information such as images and text clear and distinguishable;

[0057] Step S6, Collect optical data: Collect 28 groups of optical data (in this embodiment, 28 pictures of different colors are selected), and determine whether the LV (luminance) is greater than 480. When LV > 480 is satisfied, the data (in this embodiment, the picture chromaticity luminance data) is put into the DLL (algorithm software package for LCM testing) library. Among them, the target coordinate value of W (white picture) is selected as (0.303, 0.039). If LV is less than or equal to 480, then determine whether the coordinates of the chromaticity control value satisfy the following conditions: 0.292 ≤ X ≤ 0.314 and 0.298 ≤ Y ≤ 0.320. If the conditions are satisfied, enter the ONEGammam mode, do not perform chromaticity adjustment, and directly write to the DLL library. If any of the above conditions is not satisfied, chromaticity adjustment is required. Among them, if 0.292 ≤ X ≤ 0.314, the X target coordinate is directly written with the current coordinate value. If X < 0.292, the X target coordinate is directly written with 0.292. If X > 0.314, the X target coordinate is directly written with 0.314. If 0.298 ≤ Y ≤ 0.320, the Y target coordinate is directly written with the current coordinate value. If Y < 0.298, the Y target coordinate is directly written with 0.298. If Y > 0.320, the Y target coordinate is directly written with 0.320. Write the adjusted coordinate value to the DLL library;

[0058] Step S7, DLL library adjustment: Make the first adjustment to the DLL library according to the value of the previous step;

[0059] Step S8, Asymmetric gamma voltage adjustment: Write the asymmetric gamma code (i.e., GammaCode) into the LCM display screen to perform asymmetric gamma voltage (Gamma) adjustment;

[0060] Step S9, Second common electrode voltage (i.e., VCOM) adjustment: Confirm the following parameters of the common electrode voltage: FLK ≤ -30DB, G64 ≤ -43DB, G127 ≤ -43DB. If any of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters are met, continue to execute the next step. Among them, FLK is the picture jitter value; G64 is 64 gray, and G127 is 127 gray;

[0061] Step S10, testing optical parameters: In this embodiment, the optical parameters tested are mainly RGB and sRGB. Confirm the following parameters of the common electrode voltage: 0.627 ≤ Rx ≤ 0.657, 0.321 ≤ Ry ≤ 0.351, 0.281 ≤ Gx ≤ 0.311, 0.586 ≤ Gy ≤ 0.622, 0.139 ≤ Bx ≤ 0.169, 0.041 ≤ By ≤ 0.071, sRGB ≥ 95%. The above parameters are the control ranges of RGB color coordinates. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters are met, continue to execute the next step;

[0062] Step S11, testing the optical parameters of the black screen and the white screen: In this embodiment, the optical parameters of the black screen and the white screen tested mainly include: 0.288 ≤ Wx ≤ 0.318, 0.294 ≤ Wy ≤ 0.324, 400 ≤ WLv ≤ 600, WOLv ≤ 1.2 nits. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters are met, continue to execute the next step. The above parameters are the control ranges of the white screen coordinates and the control range of the brightness;

[0063] Step S12, testing the gamma curve: In this embodiment, the parameters of the gamma curve (i.e., Gamma2.2) mainly include: 2.1 ≤ Y ≤ 2.3, ay ≤ 1.0, ab ≤ 1.0, r2 ≥ 0.99. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters are met, continue to execute the next step. In this embodiment, the above parameters are optical parameter indicators, usually set according to customer requirements;

[0064] Step S13, testing the UV optical value (i.e., ΔUV): In this embodiment, the parameters of the UV optical value (i.e., ΔUV) mainly include: G255 - G32 ≤ 0.01 (Δv), G31 - G23 ≤ 0.0125 (Δv), G22 - G11 ≤ 0.04 (Δv). If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters are met, continue to execute the next step. In this embodiment, the above parameters are gray-scale optical parameters, usually set according to customer standards;

[0065] Step S14, burning (i.e., NVM): Perform LCM program burning;

[0066] Step S15, Test optical parameters after programming: In this embodiment, the optical parameters tested after programming are mainly RGB and sRGB, including the following parameters: 0.627 ≤ Rx ≤ 0.657, 0.321 ≤ Ry ≤ 0.351, 0.281 ≤ Gx ≤ 0.311, 0.586 ≤ Gy ≤ 0.622, 0.139 ≤ Bx ≤ 0.169, 0.041 ≤ By ≤ 0.071, sRGB ≥ 95%. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after programming. If all parameters are met, continue to the next step. In this embodiment, the above parameters are set for RGB color coordinate parameters, usually set according to the requirements of One Foundation customers in the industry standard;

[0067] Step S16, Test optical parameters of black and white screens after programming: After programming in this embodiment, the optical parameters of the black and white screens tested mainly include: 0.288 ≤ Wx ≤ 0.318, 0.294 ≤ Wy ≤ 0.324, 400 ≤ WLv ≤ 600, WOLv ≤ 1.2 nits. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after programming. If all parameters are met, continue to the next step. In this embodiment, the above parameters are the control range of the white screen color coordinates, usually set according to customer requirements;

[0068] Step S17, Test gamma curve after programming: In this embodiment, the parameters of the gamma curve (i.e., Gamma 2.2) after programming mainly include: 2.1 ≤ Y ≤ 2.3, ay ≤ 1.0, ab ≤ 1.0, r2 ≥ 0.99. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after programming. If all parameters are met, continue to the next step. In this embodiment, the above parameters are the requirements of optical indicators, usually set according to customer requirements;

[0069] Step S18, Test UV optical value (i.e., ΔUV) after programming: In this embodiment, the parameters of the UV optical value (i.e., ΔUV) mainly include: G255 - G32 ≤ 0.01 (Δv), G31 - G23 ≤ 0.0125 (Δv), G22 - G11 ≤ 0.04 (Δv). If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after programming. If all parameters are met, continue to the next step. In this embodiment, the above parameters are the requirements of optical indicators, usually set according to customer requirements;

[0070] Step S19, test the contrast ratio (i.e., Lv contrast ratio): In this embodiment, if the condition contrast ratio≥400 does not hold, directly exit, indicating that there is a problem with the LCM screen after this programming. If the condition holds, continue to the next step. In this embodiment, the contrast ratio is for contrast testing and is usually set according to customer requirements;

[0071] Step S20, test the gray screen jitter value: In this embodiment, when testing the gray screen jitter value, the following three parameters need to be tested: flicher (purple - green), G127, and G63. Among them, FLK≤ - 30DB, G63≤ - 43DB, G127≤ - 43DB. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after this programming. If all parameters are met, continue to the next step. In this embodiment, the above parameters are for the screen jitter value test and are usually set according to customer requirements;

[0072] Step S21, test whether it meets the standard: Test whether the programmed LCM display screen meets the corresponding specification standards. Depending on the different specification standards, the satisfied conditions are also different. Among them, 400nit≤C - specification≤415nit, 415nit≤B - specification≤430nit, 430nit≤A - specification≤600nit. If the conditions are met, it indicates that the programming is successful and the programming process ends. If the conditions are not met, directly exit, indicating that there is a problem with the LCM screen after this programming. In this embodiment, according to the different brightness levels of the products, A means excellent, B means good, and C means qualified, so as to conduct grading for later shipment.

[0073] In large - scale production, by programming the white - balance parameters, the present invention can ensure that the display effects of each device are as close as possible, reduce the differences between batches. Using the process of the present invention can reduce the decrease in product brightness during the white - balance adjustment process and optimize the display effect. The present invention improves through the programming process, thereby controlling the brightness attenuation during the programming process, ensuring the product display effect, controlling the defects caused by programming, reducing production losses, and reducing production costs. When programming according to the process of the present invention, the adjusted white - point coordinates are relatively divergent, and the adjustment range of the white - point Y coordinate is small, which can control the brightness attenuation and make the brightness meet the required specifications.

Claims

1. A burning process method for burning white balance of an LCM product to reduce brightness attenuation, characterized in that: The method described above includes the following steps: Step S1, Startup: Start the programming process, turn on the display of the LCM screen, including: powering on the LCM screen, inputting initialization code, and lighting up the backlight; Step S2, First Common Electrode Voltage Adjustment: Confirm whether the jitter value of the common electrode voltage is less than or equal to 30 dB. If FLK is greater than 30 dB, directly exit, indicating that there is a problem with this LCM screen. If the condition FLK ≤ 30 dB is met, continue to the next step; Step S3, Confirm Gamma Maximum Voltage: Confirm the gamma maximum voltage of the LCM display screen; Step S4, Write Test Code: Write test code to the LCM display screen; Step S5, Test White Screen Brightness: Make the LCM display screen show a pure white screen, and detect the brightness of the white screen through a detection tool. If the brightness of the white screen meets the requirements, continue to the next step. If it does not meet the requirements, exit; Step S6, Collect Optical Data: Collect 28 groups of optical data, and determine whether LV is greater than 480. When LV > 480, put the data into the DLL library. Among them, the target coordinate value of W is selected as (0.303, 0.039). If LV is less than or equal to 480, determine whether the coordinates meet the conditions. If they meet, write to the DLL library. If they do not meet, write to the DLL library after adjustment; Step S7, DLL Library Adjustment: Make the first adjustment to the DLL library according to the values in the previous step; Step S8, Asymmetric Gamma Voltage Adjustment: Write asymmetric gamma code into the LCM display screen to perform asymmetric gamma voltage adjustment; Step S9, Second Common Electrode Voltage Adjustment: Confirm the following parameters of the common electrode voltage, FLK ≤ -30 DB, G64 ≤ -43 DB, G127 ≤ -43 DB. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters meet the requirements, continue to the next step; Step S10, Test Optical Parameters: If the optical parameters meet the conditions, continue to the next step. If they do not meet the conditions, exit; Step S11, Test Optical Parameters of Black Screen and White Screen: If the conditions are met, continue to the next step. If they are not met, exit; Step S12, Test Gamma Curve: The gamma curve parameters include: 2.1 ≤ Y ≤ 2.3, ay ≤ 1.0, ab ≤ 1.0, r2 ≥ 0.

99. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters meet the requirements, continue to the next step; Step S13, Test UV Optical Value: The UV optical value parameters include: G255 - G32 ≤ 0.01 (Δv), G31 - G23 ≤ 0.0125 (Δv), G22 - G11 ≤ 0.04 (Δv). If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters meet the requirements, continue to the next step; Step S14, Programming: Perform LCM program programming; Step S15: Test optical parameters after burning. If the conditions are met, proceed to the next step; otherwise, exit. Step S16: Test optical parameters of black and white screens after burning. If the conditions are met, proceed to the next step; otherwise, exit. Step S17: Test gamma curve after burning. If the conditions are met, proceed to the next step; otherwise, exit. Step S18: Test UV optical value after burning. If the conditions are met, proceed to the next step; otherwise, exit. Step S19: Test contrast ratio. If the condition contrast ratio ≥ 400 does not hold, directly exit, indicating that there is a problem with the LCM screen after this burning. If the condition holds, proceed to the next step. Step S20: Test the jitter value of the gray screen. If the conditions are met, proceed to the next step; otherwise, exit. Step S21: Test compliance with standards. Test whether the burned LCM display meets the corresponding specification standards. Depending on the different specification standards, the satisfied conditions are also different. Among them, 400 nit ≤ C specification ≤ 415 nit, 415 nit ≤ B specification ≤ 430 nit, 430 nit ≤ A specification ≤ 600 nit. If the conditions are met, it indicates that the burning is successful and the burning process ends. If the conditions are not met, directly exit, indicating that there is a problem with the LCM screen after this burning.

2. The burning process method for reducing brightness attenuation by burning white balance of the LCM product according to claim 1, characterized in that: In the aforementioned step S5, if the brightness of the white screen is less than 400 nit, directly exit, indicating that there is a problem with this LCM screen. If WLV ≥ 400 nit is satisfied, proceed to the next step.

3. The burning process method for burning white balance of the LCM product according to claim 1 to reduce brightness attenuation, characterized in that: In the aforementioned step S6, the coordinate conditions are 0.292 ≤ X ≤ 0.314 and 0.298 ≤ Y ≤ 0.

320. If the conditions are met, enter the ONEGammam mode, do not perform color coordinate adjustment, and directly write to the DLL library. If any of the aforementioned conditions is not met, color coordinate adjustment is required. Among them, if 0.292 ≤ X ≤ 0.314, the X target coordinate is directly written with the current coordinate value. If X < 0.292, the X target coordinate is directly written with 0.

292. If X > 0.314, the X target coordinate is directly written with 0.

314. If 0.298 ≤ Y ≤ 0.320, the Y target coordinate is directly written with the current coordinate value. If Y < 0.298, the Y target coordinate is directly written with 0.

298. If Y > 0.320, the Y target coordinate is directly written with 0.

320. Write the adjusted coordinate values to the DLL library.

4. The burning process method for reducing brightness attenuation during the burning of the LCM product white balance according to claim 1, characterized in that: In the said step S10, the tested optical parameters are RGB and sRGB. Confirm the following parameters of the common electrode voltage: 0.627 ≤ Rx ≤ 0.657, 0.321 ≤ Ry ≤ 0.351, 0.281 ≤ Gx ≤ 0.311, 0.586 ≤ Gy ≤ 0.622, 0.139 ≤ Bx ≤ 0.169, 0.041 ≤ By ≤ 0.071, sRGB ≥ 95%. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters meet the requirements, continue to execute the next step.

5. The burning process method for burning white balance of the LCM product according to claim 1 to reduce brightness attenuation, characterized in that: In the said step S11, the tested optical parameters of the black screen and the white screen include: 0.288 ≤ Wx ≤ 0.318, 0.294 ≤ Wy ≤ 0.324, 400 ≤ WLv ≤ 600, WOLv ≤ 1.2 nits. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen. If all parameters meet the requirements, continue to execute the next step.

6. The burning process method for reducing brightness attenuation by burning white balance of the LCM product according to claim 1, characterized in that: In the said step S15, the tested optical parameters after burning are RGB and sRGB, including the following parameters: 0.627 ≤ Rx ≤ 0.657, 0.321 ≤ Ry ≤ 0.351, 0.281 ≤ Gx ≤ 0.311, 0.586 ≤ Gy ≤ 0.622, 0.139 ≤ Bx ≤ 0.169, 0.041 ≤ By ≤ 0.071, sRGB ≥ 95%. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen after burning. If all parameters meet the requirements, continue to execute the next step.

7. The burning process method for reducing brightness attenuation by burning white balance of the LCM product according to claim 1, wherein: In the said step S16, after burning, the tested optical parameters of the black screen and the white screen include: 0.288 ≤ Wx ≤ 0.318, 0.294 ≤ Wy ≤ 0.324, 400 ≤ WLv ≤ 600, WOLv ≤ 1.2 nits. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen after burning. If all parameters meet the requirements, continue to execute the next step.

8. The burning process method for reducing brightness attenuation by burning white balance of the LCM product according to claim 1, characterized in that: In the said step S17, the gamma curve parameters after burning include: 2.1 ≤ Y ≤ 2.3, ay ≤ 1.0, ab ≤ 1.0, r2 ≥ 0.

99. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen after burning. If all parameters meet the requirements, continue to execute the next step.

9. The burning process method for burning white balance of the LCM product according to claim 1 to reduce brightness attenuation is characterized in that: In the said step S18, the UV optical value parameters include: G255 - G32 ≤ 0.01 (Δv), G31 - G23 ≤ 0.0125 (Δv), G22 - G11 ≤ 0.04 (Δv). If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with this LCM screen after burning. If all parameters meet the requirements, continue to execute the next step.

10. The burning process method for reducing brightness attenuation by burning white balance of the LCM product according to claim 1, characterized in that: In the step S20 described above, when testing the jitter value of the gray screen, the following three parameters need to be tested: flicher, G127, and G63. Among them, FLK ≤ -30DB, G64 ≤ -43DB, G127 ≤ -43DB. If any one of the parameters does not meet the requirements, directly exit, indicating that there is a problem with the LCM screen after burning. If all parameters meet the requirements, continue to execute the next step.

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