Liquid crystal device with shorting ring and transistors for electrostatic discharge protection
First Claim
1. A liquid crystal display device comprising:
- an insulating substrate manifesting an insulating property at least on a surface thereof;
a plurality of address wires formed in a display region on said insulating substrate;
a plurality of data wires formed to intersect said address wires;
first thin-film transistors formed one each at points of intersection of said address wires and data wires and having gate electrodes electrically connected to said address wires and drain electrodes electrically connected to said data wires;
picture element electrodes formed one each near said points of intersection and electrically connected to the source electrodes of said first thin-film transistors; and
a short-circuiting wire formed along at least part of a periphery of the display region of said insulating substrate and adapted to short-circuit said address wires and data wires to each other through a first resistor made of a second thin-film transistor, said short-circuiting wire formed along at least part of the periphery of the display region of said insulating substrate and being electrically connected such that a portion of said short-circuiting wire surrounds the first resistor made of the second thin-film transistor, a part of the short-circuiting wire being formed inside of the first resistor.
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Accused Products
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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Citations
21 Claims
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1. A liquid crystal display device comprising:
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an insulating substrate manifesting an insulating property at least on a surface thereof; a plurality of address wires formed in a display region on said insulating substrate; a plurality of data wires formed to intersect said address wires; first thin-film transistors formed one each at points of intersection of said address wires and data wires and having gate electrodes electrically connected to said address wires and drain electrodes electrically connected to said data wires; picture element electrodes formed one each near said points of intersection and electrically connected to the source electrodes of said first thin-film transistors; and a short-circuiting wire formed along at least part of a periphery of the display region of said insulating substrate and adapted to short-circuit said address wires and data wires to each other through a first resistor made of a second thin-film transistor, said short-circuiting wire formed along at least part of the periphery of the display region of said insulating substrate and being electrically connected such that a portion of said short-circuiting wire surrounds the first resistor made of the second thin-film transistor, a part of the short-circuiting wire being formed inside of the first resistor. - View Dependent Claims (2, 3, 4, 5)
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6. A liquid crystal display device comprising:
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an insulating substrate manifesting an insulating property at least on a surface thereof; a plurality of address wires formed in a display region on said insulating substrate; a plurality of data wires formed to intersect said address wires; first thin-film transistors formed one each at points of intersection of said address wires and data wires and having gate electrodes electrically connected to said address wires and drain electrodes electrically connected to said data wires; picture element electrodes formed one each near said points of intersection and electrically connected to the source electrodes of said first thin-film transistors; and a short-circuiting wire formed along at least part of a periphery of the display region of said insulating substrate and adapted to short-circuit said address wires and data wires to each other through a first resistor made of a second thin-film transistor; wherein said second thin-film transistor has a first part of opposite source and drain electrodes and a second part of opposite source and drain electrodes distinct from said first part, the second part of opposite source and drain electrodes being more easily broken by static electricity than the first part of opposite source and drain electrode. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A liquid crystal display device comprising:
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an insulating substrate manifesting an insulating property at least on a surface thereof; a plurality of address wires formed in a display region on said insulating substrate; a plurality of data wires formed to intersect said address wires; first thin-film transistors formed one each at points of intersection of said address wires and data wires and having gate electrodes electrically connected to said address wires and drain electrodes electrically connected to said data wires; picture element electrodes formed one each near said points of intersection and electrically connected to source electrodes of said first thin-film transistors; and a short-circuiting wire formed along at least part of a periphery of the display region of said insulating substrate and adapted to short-circuit said address wires and data wires to each other through a first resistor made of a second thin-film transistor, wherein the short-circuiting wire surrounds the second thin-film transistor except that a gate-electrode of the second thin-film transistor protrudes outside the short-circuiting wire. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification