US5680190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display apparatus including the same transparent material in the TFT semiconductor layer and a sub-pixel electrode
Assignee: Panasonic Holdings Corp
•
Filing: 1995-06-01
•
Granted: 1997-10-21
•
Expires: 2015-06-01
Abstract
Abstract A liquid crystal display apparatus includes: a liquid crystal layer; a first substrate and a second substrate interposing the liquid crystal layer therebetween; a pixel electrode and a counter electrode respectively provided on opposing faces of the first substrate and the second substrate for applying a voltage to the liquid crystal layer; and a thin-film transistor provided on the first substrate and electrically connected to the pixel electrode, the thin-film transistor including a semiconductor layer having a source region and a drain region, wherein the pixel electrode is divided into a first sub-pixel electrode and a second sub-pixel electrode; parts of the first and second sub-pixel electrodes are overlapped via an insulating layer with each other; and at least one of the first and second sub-pixel electrodes is made of the same transparent material as a material for the semiconductor layer.
Inventors
- 👤 Akiko Michibayashi
- 👤 Tetsuya Kawamura
- 👤 Mamoru Furuta
- 👤 Yutaka Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:32
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/136; G02F1/1362; G02F1/136213; G02F1/134345; G02F1/134354; G02F1/1368
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
A liquid crystal display apparatus comprising: a liquid crystal layer; a first substrate and a second substrate interposing the liquid crystal layer therebetween; a pixel electrode and a counter electrode respectively provided on opposing faces of the first substrate and the second substrate for applying a voltage to the liquid crystal layer; and a thin-film transistor provided on the first substrate and electrically connected to the pixel electrode, the thin-film transistor including a semiconductor layer having a source region and a drain region, wherein the pixel electrode is divided into a first sub-pixel electrode and a second sub-pixel electrode; parts of the first and second sub-pixel electrodes are overlapped via an insulating layer with each other; and at least one of the first and second sub-pixel electrodes is made of the same transparent material as a material for the semiconductor layer.
Claim 2
Dependent Claim
141 words
A liquid crystal display apparatus comprising: a liquid crystal layer; a first substrate and a second substrate interposing the liquid crystal layer therebetween; a pixel electrode and a counter electrode respectively provided on opposing faces of the first substrate and the second substrate for applying a voltage to the liquid crystal layer; and a thin-film transistor provided on the first substrate and electrically connected to the pixel electrode, the thin-film transistor including a semiconductor layer having a source region and a drain region, wherein the pixel electrode is divided into a first sub-pixel electrode and a second sub-pixel electrode; parts of the first and second sub-pixel electrodes are overlapped via an insulating layer with each other; and at least one of the first and second sub-pixel electrodes is made of the same transparent material as a material for the semiconductor layer.
Claim 3
Dependent Claim
29 words
A liquid crystal display apparatus according to claim 1, wherein at least one of the first and second sub-pixel electrodes is divided into a plurality of sub-pixel electrode portions.
Claim 4
Dependent Claim
29 words
A liquid crystal display apparatus according to claim 1, wherein the semiconductor layer and at least one of the first and second sub-pixel electrodes are made of polycrystalline silicon.
Claim 5
Dependent Claim
35 words
A liquid crystal display apparatus according to claim 1, wherein the first sub-pixel electrode has a hole in a portion thereof overlapping the second sub-pixel electrode, and the insulating layer is embedded in the hole.
Claim 6
Dependent Claim
47 words
A liquid crystal display apparatus according to claim 1, wherein a through hole is provided through the insulating layer interposed between the first sub-pixel electrode and the second sub-pixel electrode, and the first and second sub-pixel electrodes are electrically connected to each other via the through hole.
Claim 7
Dependent Claim
22 words
A liquid crystal display apparatus according to claim 1, wherein the liquid crystal layer is made of a TN type liquid crystal.
Claim 8
Dependent Claim
21 words
A liquid crystal display apparatus according to claim 1, wherein the thin-film transistor has a top-gate structure or a bottom-gate structure.
Claim 9
Dependent Claim
133 words
A liquid crystal display apparatus comprising: a liquid crystal layer; a first substrate and a second substrate interposing the liquid crystal layer therebetween; a pixel electrode and a counter electrode respectively provided on opposing faces of the first substrate and the second substrate for applying a voltage to the liquid crystal layer; and a thin-film transistor provided on the first substrate and electrically connected to the pixel electrode, the thin-film transistor having a gate electrode, wherein the pixel electrode is divided into a first sub-pixel electrode and a second sub-pixel electrode; parts of the first and second sub-pixel electrodes are overlapped via an insulating layer with each other; and at least one of the first and second sub-pixel electrodes is made of the same transparent material as a material for the gate electrode.
Claim 10
Dependent Claim
133 words
A liquid crystal display apparatus comprising: a liquid crystal layer; a first substrate and a second substrate interposing the liquid crystal layer therebetween; a pixel electrode and a counter electrode respectively provided on opposing faces of the first substrate and the second substrate for applying a voltage to the liquid crystal layer; and a thin-film transistor provided on the first substrate and electrically connected to the pixel electrode, the thin-film transistor having a gate electrode, wherein the pixel electrode is divided into a first sub-pixel electrode and a second sub-pixel electrode; parts of the first and second sub-pixel electrodes are overlapped via an insulating layer with each other; and at least one of the first and second sub-pixel electrodes is made of the same transparent material as a material for the gate electrode.
Claim 11
Dependent Claim
29 words
A liquid crystal display apparatus according to claim 8, wherein at least one of the first and second sub-pixel electrodes is divided into a plurality of sub-pixel electrode portions.
Claim 12
Dependent Claim
29 words
A liquid crystal display apparatus according to claim 8, wherein the gate electrode and at least one of the first and second sub-pixel electrodes are made of polycrystalline silicon.
Claim 13
Dependent Claim
35 words
A liquid crystal display apparatus according to claim 8, wherein the first sub-pixel electrode has a hole in a portion thereof overlapping the second sub-pixel electrode, and the insulating layer is embedded inside the hole.
Claim 14
Dependent Claim
47 words
A liquid crystal display apparatus according to claim 8, wherein a through hole is provided through the insulating layer interposed between the first sub-pixel electrode and the second sub-pixel electrode, and the first and second sub-pixel electrodes are electrically connected to each other via the through hole.
Claim 15
Dependent Claim
22 words
A liquid crystal display apparatus according to claim 8, wherein the liquid crystal layer is made of a TN type liquid crystal.
Claim 16
Dependent Claim
21 words
A liquid crystal display apparatus according to claim 8, wherein the thin-film transistor has a top-gate structure or a bottom-gate structure.
References Cited (Backward Citations)
JPS63119257A
Cited
EP0348209A2
Cited
US5191453A
Cited
JPH05107556A
Cited
EP0562120A1
Cited
US5396262A
Cited
US5319480A
Cited
US5471330A
Cited
US5483366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-10-20 | 2001-04-21 | 2001-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-20 | 2005-04-21 | 2005-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-20 | 2009-04-21 | 2009-10-21 | $7700.00 | Window Closed / Lapsed |