Liquid crystal device with shorting ring and transistors for electrostatic discharge protection
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United States of America Patent
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Dec 13, 1994
Grant Date -
N/A
app pub date -
Feb 5, 1993
filing date -
Feb 21, 1992
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An active matrix type liquid crystal display device with a short-circuiting wire for mutually short-circuiting address wires and data wires through the medium of resistors made of a thin-film transistor is formed along the periphery of a display region on an insulating substrate. The short-circuiting wire is electrically connected inside a region in which the resistors made of a thin-film transistor are formed. In one embodiment, the transistors are surrounded by a portion of the shod circuiting wire. In another embodiment, they are partially surrounded by the wire with a gate electrode which is not protruding out. In another embodiment they are formed with two source and drain regions, one which has a lower breakdown voltage than the other.
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