Liquid crystal display TFT substrate easy for rehabilitating crosspoint short circuit

Abstract

The present invention discloses a liquid crystal display TFT baseplate in which the short circuit on the junction is easy to be repaired, and includes a first metal layer and a second metal layer. An insulation layer is arranged between the first metal layer and the second metal layer. Horizontally arrayed grating lines and vertically arrayed shading lines are arranged on the first metal layer. Vertically arrayed data lines are arranged on the second metal layer. The shading lines and the grating lines in a same pixel area are communicated, and the adjacent shading lines in two adjacent pixel areas along the direction of the grating lines are communicated through a short wire. The present invention can effectively improve the repair efficiency of the liquid crystal display TFT faceplate and the success rate and the stability of the maintenance, can reduce the maintenance cost, and can amend the image display quality.

Description

technical field [0001] The invention relates to a liquid crystal display element, especially a liquid crystal display TFT substrate, which can be repaired when a short circuit occurs at the intersection of the gate line of the first metal layer or the common line of the storage capacitor and the data line of the second metal layer on the substrate. and use it normally. Background technique [0002] The liquid crystal display uses the change of the electric field strength clamped on the liquid crystal molecules to change the orientation of the liquid crystal molecules to control the intensity of light transmission to display images. Generally speaking, a complete liquid crystal display panel must be composed of a backlight module, a polarizer, a TFT lower substrate and a CF upper substrate, and a liquid crystal molecule layer filled in a box composed of these two substrates. There are a large number of pixel electrodes on the TFT substrate, and the magnitude and on-off of th...

AI Technical Summary

Problems solved by technology

FIG. 2 is a schematic diagram of a traditional repair scheme after a short circuit occurs at the intersection point. A short circuit defect 50 occurs at the crossing position of the horizontal grid line 21 and the vertical data line 23, and the data line 23 is cut off at positions 112 on both sides of the grid line 21 by using a laser. The protective insulating layer is drilled by laser at the position 113 near the disconnection point 112, and then the repair line 111 is grown along the original line by the Laser CVD method. In this case, it is difficult to ensure that the repair line 111 is grown at the same time It will not cause other short circuits, and this method is powerless after the box is formed

When the gate scanning line 14 and the signal line 26 are short-circuited at D, lasers can be used to disconnect the positions Z1 and Z2 on both sides of the signal line without affecting the transmission of the scanning signal; if a short circuit occurs at the intersection of the E position, use The laser is disconnected from Y1 and Y2, at this time, although the gate scanning signal can pass from the gate scanning line 14 to the next pixel electrode, the thin film transistor cannot apply a signal to its corresponding pixel electrode due to the lack of gate signal, resulting in In addition, the repeated circuit layout occupies a large pixel area, which affects the aperture ratio of the LCD panel.

[0006] Although the short circuit at the cross point is only one aspect of the defect that affects the picture quality of the LCD panel, the methods used so far to repair it are either complicated, the repair efficiency and quality need to be improved, or the circuit design is complicated. Affect the aperture ratio, unable to meet production requirements

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