Array substrate for a flat-display device including surge protec

Details Array substrate for a flat-display device including surge protec Array substrate for a flat-display device including surge protec

1995-09-29

1997-08-12

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

361111, 257356, 257546, H01L 2362, H01L 2900

Patent

active

056571399

ABSTRACT:
An array substrate for a flat-panel display device includes a glass substrate, a display section formed on the glass substrate and having pixel electrodes arrayed in row and column directions, pixel TFTs connected to the pixel electrodes for controlling the potentials thereof, and wiring lines including scan lines and signal lines which are connected to the pixel TFTs and extending to a removable area outside the display section, a short-circuit line formed in the removable area, surge-protection switch circuits formed in the removable area and connected between the short-circuit line and the wiring lines, each for electrically connecting a corresponding one of the wiring lines to the short-circuit line when the potential of the corresponding wiring line exceeds a predetermined level, and test pads formed in the removable area and connected to the wiring lines. Particularly, the test pads and the surge-protection switch circuits are located on one side of the display section in each of the row and column directions, and adjacent ones of the test pads are set apart from a periphery of the glass substrate by different distances.

REFERENCES:
patent: 5068748 (1991-11-01), Ukai et al.
patent: 5200876 (1993-04-01), Takeda et al.
patent: 5212573 (1993-05-01), Yamazaki
patent: 5220443 (1993-06-01), Noguchi
patent: 5233448 (1993-08-01), Wu
patent: 5313319 (1994-05-01), Salisbury
patent: 5323254 (1994-06-01), Pitt
patent: 5373377 (1994-12-01), Ogawa et al.
patent: 5471329 (1995-11-01), Nakajima et al.

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