A method for driving horizontal lines of an LCD

Abstract

The present application relates to the field of display screen (LCD) detection, and discloses a LCD horizontal line drive activation method, comprising the following steps: increasing the resistance conduction between G-G; expanding the time of GateON; using sourceLine positive and negative inversion 12Hz picture interception, detecting picture one and picture two, and activating, the content of the first step is as follows: the resistance between G-G is conducted from 10MΩ to 18.6kΩ, thereby causing leak between the Gate line, the front half frame of the picture one uses RO+GE-BO+RE- GO+BE-, the rear half frame uses RO-GE+BO-RE+GO-BE+ to perform sourceLine inversion+12Hz to activate, the front half frame of the picture two uses RO+GE+BO+RE+GO+BE+, the rear half frame uses RO-GE-BO-RE- GO-BE- to perform frame inversion+12Hz to activate, compared with the traditional scheme, the program design scheme can improve the hidden defect excitation appearance, intercepts in the front stage of the LCD, reduces the process loss and the risk of later excitation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display screen (LCD) detection, in particular to a LCD horizontal stripe driving activation method. BACKGROUND

[0002] The traditional liquid crystal display screen (LCD) detection picture is black (Dark), red (R), green (G), blue (B), gray (64), gray (127), positive scanning louver, reverse scanning louver, and the driving mode is X / Y-Line full driving.

[0003] SHARP Panel will reproduce horizontal stripes under special conditions such as high temperature and high humidity, charge residue and charge, resulting in functional defects, customer complaint risks, and normal pictures cannot be 100% displayed and intercepted. Therefore, we provide a LCD horizontal stripe driving activation method. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present application provides a LCD horizontal stripe driving activation method, which solves the above problems.

[0006] (II) Technical solutions

[0007] In order to achieve the above purpose, the present application provides the following technical solutions: a LCD horizontal stripe driving activation method, comprising the following steps:

[0008] Step 1: increase the resistance conduction between G-G;

[0009] Step 2: expand the Gate ON time;

[0010] Step 3: use source Line positive and negative inversion 12Hz picture interception, detection picture 1 and picture 2, and activation.

[0011] Preferably, the content of the first step is as follows: the resistance between G-G is turned on from 10MΩ to 18.6kΩ, so that there is leak between the Gate lines.

[0012] Preferably, the picture one uses RO+GE-BO+RE-GO+BE- in the first half frame, and uses RO-GE+BO-RE+GO-BE+ in the second half frame to perform Source Line inversion + 12Hz for activation.

[0013] Preferably, the picture two uses RO+GE+BO+RE+GO+BE+ in the first half frame, and uses RO-GE-BO-RE-GO-BE- in the second half frame to perform frame inversion + 12Hz for activation.

[0014] (III) Advantages

[0015] Compared with the prior art, the present application provides an LCD horizontal line driving activation method, which has the following advantages:

[0016] 1. The LCD horizontal line driving activation method can improve the hidden defect excitation and appearance, intercept the defects in the front stage of the LCD, and reduce the process loss and post-excitation risk compared with the traditional scheme. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of a failure mechanism defect area;

[0018] Figure 2 is a schematic diagram of the cause of the horizontal line failure mechanism being Gate line leak;

[0019] Figure 3 is a schematic diagram of the Gate line leak being caused by Gate film residue;

[0020] Figure 4 is a schematic diagram of expanding the Gate ON time;

[0021] Figure 5 is a schematic diagram of pictures ① and ②. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] Please refer to Figures 1-3 , the existing failure mechanism:

[0024] 1. Monitor the abnormal waveform of Gate base line, cut off the Gate base line, and since the Gate waveform of the GOA loop output part is normal, it can be judged that the defect is caused in the display area, please refer to Figure 1 ;

[0025] 2. Measure the resistance between the adjacent Gate lines of the horizontal line occurrence position, and confirm that the cause of the horizontal line is Gate line (gate line) leak (G-G leak), please refer to Figure 2 ;

[0026] 3. In the cross-hatched part, it is confirmed that there is a convex unevenness at the edge of the TP line intersecting with the Gate line. From the analysis result of the cross-sectional SEM, it is found that there is a Gate metal film residue along the edge of the TP line. It is determined that the leak between the Gate lines is caused by the Gate film residue. See Figure 3 ;

[0027] GOA is the abbreviation of Gate on Array, the gate IC is integrated on the glass, and the panel can be without gate ic. Most of the narrow frame panels use GOA technology. The functions of the gate IC used in the panel are divided into two parts: one is level shift, and the other is shift register. The function of the level shift part is to boost the voltage of the panel Vin to several levels required by the IC output, such as VGH and VGL, VSS, etc. The function of the shift register is to move the output of the IC row by row. GOA design integrates the shift register function into the glass, and the level shift function is integrated into the PCBA. In fact, GOA integrates half of the functions of the gate ic.

[0028] Only panels with a-Si or IGZO process use GOA. LTPS process does not use GOA. The reason is that gate ic uses semiconductor process, and a large number of PMOS and NMOS are integrated on the silicon wafer. LTPS process can also make a large number of PMOS and NMOS on the glass at the same time, so LTPS process can naturally integrate IC on the glass. In fact, in the LTPS process, the shift register in the gate ic is directly made on the glass, and no one will think it is strange. In theory, using LTPS process, not only gate ic, but also source ic or Tcon can be integrated on the glass. High integration is a superior feature of LTPS process.

[0029] But for a-Si process and IGZO, it is naturally impossible to integrate IC because it can only make NMOS and cannot make PMOS. It is strange that some people have figured out some circuits that can achieve the function of shift register only with NMOS. Therefore, accurately speaking, the GOA we refer to is the shift register integrated on the glass in the a-Si (including IGZO) process.

[0030] Please refer to Figures 4-5 , a LCD cross-hatched driving activation method, comprising the following steps:

[0031] 1. Normal GateLine between 10MΩ resistance more than the standard resistance of the conductor, G-G will not affect the between, because the SHARP TFT process in the film deposition and MASK process film residue, G-G resistance from 10MΩ to 18.6kΩ, resulting in Gate line between the leak (G-G leak) ;

[0032] Current work W = UIt = Uq; voltage U = W / q = 3.6 / 18 = 0.2V; current I = U / R = 0.2 / 10 = 0.02A;

[0033] 2. Because of the high resistance between the Gate line leak, in order to detect the bad, it is necessary to ensure that the time of writing to expand GateON, see Figure 4 ;

[0034] 3. SHARP Panel in special conditions, such as high temperature and humidity, charge residual and charge charge will reproduce horizontal stripes, resulting in functional failure, customer complaint risk problem, normal picture can not be 100% interception, therefore designed a source Line positive and negative inversion 12Hz picture intercept, detection picture ① and ②;

[0035] Picture ①: the first half frame using RO + GE - BO + RE - GO + BE -, the second half frame using RO - GE + BO - RE + GO - BE + for Source Line inversion + 12Hz for activation;

[0036] Picture ②: the first half frame using RO + GE + BO + RE + GO + BE +, the second half frame using RO - GE - BO - RE - GO - BE - for frame inversion + 12Hz for activation.

[0037] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for driving and activating horizontal lines on an LCD, characterized in that, Includes the following steps: Step 1: Change the resistance between GG from 10MΩ to 18.6kΩ; Step 2: Extend the Gate ON time; Step 3: Use the source line to intercept the 12Hz screen by rotating it forward and backward, and activate screen 1 and screen 2. In screen one, the first half of the frame uses RO (red output) + GE (green enable) - BO (blue output) + RE (red enable) - GO (green output) + BE (blue enable) - and the second half of the frame uses RO (red output) - GE (green enable) + BO (blue output) - RE (red enable) + GO (green output) - BE (blue enable) + to invert the source line and activate 12Hz. In screen two, the first half of the frame uses RO (red output) + GE (green enable) + BO (blue output) + RE (red enable) + GO (green output) + BE (blue enable) + and the second half of the frame uses RO (red output) - GE (green enable) - BO (blue output) - RE (red enable) - GO (green output) - BE (blue enable) - to invert the frame and activate 12Hz.

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