US5162901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active-matrix display device with added capacitance electrode wire and secondary wire connected thereto
Assignee: Sharp Corp
•
Filing: 1990-05-23
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Granted: 1992-11-10
•
Expires: 2010-05-23
Abstract
Abstract An active-matrix display device having low-resistance added capacitance electrode wires in which single or plural secondary wires connected electrically to the added capacitance electrode wires reduce the apparent electrical resistance of the added capacitance electrode wires, which makes the time constant of the added capacitance electrode wires smaller, so that the charging characteristics of the added capacitance are improved and contrast and other display characteristics of the liquid crystal display device are improved.
Inventors
- 👤 Yasunori Shimada
- 👤 Hirohisa Tanaka
- 👤 Hisashi Saito
- 👤 Hitoshi Ujimasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136213; H; H10; H10D; H10D86/00; H10D86/40; H10D86/441; H10D86/60; G02F1/136286; G02F1/13629
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
An active-matrix display device comprising a pair of insulation substrates that face each other, picture element electrodes that are arranged in a matrix on an inner surface of one of said substrates, an added capacitance electrode wire made of a transparent conductive film that faces each of said picture element electrodes with at least one insulation film sandwiched therebetween, and a secondary wire that is disposed above said added capacitance electrode wire with an insulation film sandwiched therebetween, said insulation film having at least a connection groove by which said added capacitance electrode wire and said secondary wire are electrically connected to each other, an anode oxidation film being formed on said secondary wire and gate electrodes formed on said insulation film.
Claim 2
Dependent Claim
122 words
An active-matrix display device comprising a pair of insulation substrates that face each other, picture element electrodes that are arranged in a matrix on an inner surface of one of said substrates, an added capacitance electrode wire made of a transparent conductive film that faces each of said picture element electrodes with at least one insulation film sandwiched therebetween, and a secondary wire that is disposed above said added capacitance electrode wire with an insulation film sandwiched therebetween, said insulation film having at least a connection groove by which said added capacitance electrode wire and said secondary wire are electrically connected to each other, an anode oxidation film being formed on said secondary wire and gate electrodes formed on said insulation film.
Claim 3
Dependent Claim
32 words
An active-matrix device according to claim 1 wherein the said gate electrodes are made of the same metal as that of the said secondary wire, and the said metal can be anodized.
Claim 4
Dependent Claim
181 words
An active-matrix display device comprising a pair of insulation substrates, a number of scanning lines that are disposed in a parallel manner on an inner surface of one of said substrates, a connection terminal that is formed at one end of each of said scanning lines, a number of added capacitance electrode wires each of which have electrical resistance and are arranged in a parallel manner between the adjacent scanning lines, said added capacitance electrode wires being made of a transparent conductive film, and a secondary wire for reducing the electric resistance of said added capacitance electrode wires, wherein said scanning lines each of which is electrically connected to a connection terminal at its one end are disposed alternatively in the opposite direction in a parallel manner, and said secondary wire is composed of first parts that are electrically connected to said corresponding added capacitance electrode wires so as to be parallel to said scanning lines and second parts that electrically connect with said first parts of said secondary wire so that said secondary wire is positioned in a zigzag manner.
Claim 5
Dependent Claim
181 words
An active-matrix display device comprising a pair of insulation substrates, a number of scanning lines that are disposed in a parallel manner on an inner surface of one of said substrates, a connection terminal that is formed at one end of each of said scanning lines, a number of added capacitance electrode wires each of which have electrical resistance and are arranged in a parallel manner between the adjacent scanning lines, said added capacitance electrode wires being made of a transparent conductive film, and a secondary wire for reducing the electric resistance of said added capacitance electrode wires, wherein said scanning lines each of which is electrically connected to a connection terminal at its one end are disposed alternatively in the opposite direction in a parallel manner, and said secondary wire is composed of first parts that are electrically connected to said corresponding added capacitance electrode wires so as to be parallel to said scanning lines and second parts that electrically connect with said first parts of said secondary wire so that said secondary wire is positioned in a zigzag manner.
Claim 6
Dependent Claim
20 words
An active-matrix display device according to claim 3, wherein said secondary wire is positioned to be divided into plural portions.
References Cited (Backward Citations)
US4582395A
Cited
JPS57115856A
Cited
JPS5821863A
Cited
JPS58130561A
Cited
JPS58159518A
Cited
JPS595229A
Cited
JPS597344A
Cited
US4600274A
Cited
JPS60169828A
Cited
JPS60230117A
Cited
JPS60230118A
Cited
JPS60239711A
Cited
JPS6129820A
Cited
JPS61151516A
Cited
JPS61243430A
Cited
JPS6290624A
Cited
US4728176A
Cited
JPS62227130A
Cited
JPS62296123A
Cited
JPS62148929A
Cited
US4955697A
Cited
JPS6468721A
Cited
JPH01255831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |