US5656826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal device with thick passivation layer over driver region
Assignee: Seiko Epson Corp
•
Filing: 1995-03-28
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Granted: 1997-08-12
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Expires: 2015-03-28
Abstract
Abstract An active matrix panel including a matrix of driving electrodes couples through thin film transistor switches to a corresponding source line and gate line and at least one of a driver circuit including complementary thin film transistors for driving the source and/or gate lines of the picture elements on the substrate. The thin film transistors of the active matrix have the same cross-sectional structure as the P-type or the N-type thin film transistors forming the driver circuit and are formed during the same patterning process.
Inventors
- 👤 Toshiyuki Misawa
- 👤 Hiroyuki Oshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:43
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/13454; H; H10; H10D; H10D84/00; H10D84/80; H10D84/82; H10D84/83; H10D84/85; H10D84/859; G09; G09G; G09G3/00; G09G3/001; G09G3/002; G09G3/003; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3674; G09G3/3677; G09G3/3685; G09G3/3688; H10D84/01; H10D84/0123; H10D84/0126; H10D84/0165; H10D84/0191; H10D86/00; H10D86/40; H10D86/441; H10D86/60; H10W; H10W20/00; H10W20/40; G02F1/133345; G02F1/136; G02F1/1362; G02F1/136213; G02F1/136254; G09G2300/00; G09G2300/04; G09G2300/0404; G09G2300/0408; G09G2300/08; G09G2300/0809; G09G2330/00; G09G2330/12; G09G3/006; G09G3/2007; G09G3/2011; G09G3/3659; H10D30/00; H10D30/60; H10D30/67; H10D30/6704; H10D30/6713; H10W72/00; H10W72/01; H10W72/015; H10W72/01515; H10W72/071; H10W72/075; Y; Y10; Y10S; Y10S257/00; Y10S257/923; Y10S345/00; Y10S345/904
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
139 words
A liquid crystal device for an electro-optical device, the liquid crystal device including a plurality of liquid crystal cells wherein data signals are supplied to the liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the liquid crystal device comprising: a substrate having a pixel region and at least one driver region, said picture elements being arranged in said pixel region; driving means formed in the at least one driver region for driving said field effect transistors, the driving means including at least a shift register having CMOS thin film transistors; and a passivation film having a thickness of at least about 1 μm formed on the driver region and not formed on the pixel region, the passivation film forming a waterproof layer protecting the driver region from the external environment.
Claim 2
Dependent Claim
139 words
A liquid crystal device for an electro-optical device, the liquid crystal device including a plurality of liquid crystal cells wherein data signals are supplied to the liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the liquid crystal device comprising: a substrate having a pixel region and at least one driver region, said picture elements being arranged in said pixel region; driving means formed in the at least one driver region for driving said field effect transistors, the driving means including at least a shift register having CMOS thin film transistors; and a passivation film having a thickness of at least about 1 μm formed on the driver region and not formed on the pixel region, the passivation film forming a waterproof layer protecting the driver region from the external environment.
Claim 3
Dependent Claim
13 words
The liquid crystal device of claim 1, wherein said passivation film includes polyimido.
Claim 4
Dependent Claim
25 words
The liquid crystal device of claim 1, wherein the field effect transistors and the CMOS thin film transistors are formed from a thin silicon film.
Claim 5
Dependent Claim
15 words
The liquid crystal device of claim 3, wherein the thin silicon film includes polycrystalline silicon.
Claim 6
Dependent Claim
56 words
The liquid crystal device of claim 1, wherein the field effect transistors and the CMOS thin film transistors each have a source region, a drain region and a separating region for separating the source region from the drain region, the source region, the drain region and the separating region being formed from a thin silicon film.
Claim 7
Dependent Claim
15 words
The liquid crystal device of claim 5, wherein the thin silicon film includes polycrystalline silicon.
Claim 8
Dependent Claim
60 words
The liquid crystal device of claim 1, further comprising: an insulating film having a thickness of about 3000 Å or less formed on the pixel region and the driver region; and a liquid crystal material formed on the insulating film in the pixel region, the insulating film in the pixel region preventing DC voltage application to the liquid crystal material.
Claim 9
Dependent Claim
21 words
The liquid crystal device of claim 7, wherein the passivation film is formed over the insulating film in the driver region.
Claim 10
Dependent Claim
124 words
A liquid crystal device for an electro-optical device, the liquid crystal device including a plurality of liquid crystal cells wherein data signals are supplied to the liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the liquid crystal device comprising: a substrate having a pixel region and at least one driver region, said picture elements being arranged in said pixel region; driving means formed in the at least one driver region for driving said field effect transistors, the driving means including at least a shift register having CMOS thin film transistors; and a passivation film having a thickness of at least about 1 μm formed on the driver region and not formed on the pixel region.
Claim 11
Dependent Claim
124 words
A liquid crystal device for an electro-optical device, the liquid crystal device including a plurality of liquid crystal cells wherein data signals are supplied to the liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the liquid crystal device comprising: a substrate having a pixel region and at least one driver region, said picture elements being arranged in said pixel region; driving means formed in the at least one driver region for driving said field effect transistors, the driving means including at least a shift register having CMOS thin film transistors; and a passivation film having a thickness of at least about 1 μm formed on the driver region and not formed on the pixel region.
Claim 12
Dependent Claim
60 words
The liquid crystal device of claim 9, further comprising: an insulating film having a thickness of about 3000 Å or less formed on the pixel region and the driver region; and a liquid crystal material formed on the insulating film in the pixel region, the insulating film in the pixel region preventing DC voltage application to the liquid crystal material.
Claim 13
Dependent Claim
21 words
The liquid crystal device of claim 10, wherein the passivation film is formed over the insulating film in the driver region.
Claim 14
Dependent Claim
162 words
A projection type color display device including a light source, at least one light valve and at least one projecting optical system for projecting a color image, the at least one light valve including a plurality of liquid crystal cells wherein data signals are supplied to the liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the at least one light valve comprising: a substrate having a pixel region and at least one driver region, said picture elements being arranged in said pixel region; driving means formed in the at least one driver region for driving said field effect transistors, the driving means including at least a shift register having CMOS thin film transistors; and a passivation film having a thickness of at least about 1 μm formed on the driver region and not formed on the pixel region, the passivation film forming a waterproof layer protecting the driver region from the external environment.
Claim 15
Dependent Claim
162 words
A projection type color display device including a light source, at least one light valve and at least one projecting optical system for projecting a color image, the at least one light valve including a plurality of liquid crystal cells wherein data signals are supplied to the liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the at least one light valve comprising: a substrate having a pixel region and at least one driver region, said picture elements being arranged in said pixel region; driving means formed in the at least one driver region for driving said field effect transistors, the driving means including at least a shift register having CMOS thin film transistors; and a passivation film having a thickness of at least about 1 μm formed on the driver region and not formed on the pixel region, the passivation film forming a waterproof layer protecting the driver region from the external environment.
Claim 16
Dependent Claim
15 words
The projection type color display device of claim 12, wherein said passivation film includes polyimido.
Claim 17
Dependent Claim
27 words
The projection type color display device of claim 12, wherein the field effect transistors and the CMOS thin film transistors are formed from a thin silicon film.
Claim 18
Dependent Claim
17 words
The projection type color display device of claim 14, wherein the thin silicon film includes polycrystalline silicon.
Claim 19
Dependent Claim
58 words
The projection type color display device of claim 12, wherein the field effect transistors and the CMOS thin film transistors each have a source region, a drain region and a separating region for separating the source region from the drain region, the source region, the drain region and the separating region being formed from a thin silicon film.
Claim 20
Dependent Claim
17 words
The projection type color display device of claim 16, wherein the thin silicon film includes polycrystalline silicon.
Claim 21
Dependent Claim
62 words
The projection type color display device of claim 12, further comprising: an insulating film having a thickness of about 3000 Å or less formed on the pixel region and the driver region; and a liquid crystal material formed on the insulating film in the pixel region, the insulating film in the pixel region preventing DC voltage application to the liquid crystal material.
Claim 22
Dependent Claim
23 words
The projection type color display device of claim 18, wherein the passivation film is formed over the insulating film in the driver region.
Claim 23
Dependent Claim
147 words
A projection type color display device including a light source, at least one light valve and at least one projecting optical system for projecting a color image, the at least one light valve including a plurality of liquid crystal cells wherein data signals are supplied to the liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the at least one light valve comprising: a substrate having a pixel region and at least one driver region, said picture elements being arranged in said pixel region; driving means formed in the at least one driver region for driving said field effect transistors, the driving means including at least a shift register having CMOS thin film transistors; and a passivation film having a thickness of at least about 1 μm formed on the driver region and not formed on the pixel region.
Claim 24
Dependent Claim
147 words
A projection type color display device including a light source, at least one light valve and at least one projecting optical system for projecting a color image, the at least one light valve including a plurality of liquid crystal cells wherein data signals are supplied to the liquid crystal cells through a plurality of field effect transistors arranged in a plurality of picture elements, the at least one light valve comprising: a substrate having a pixel region and at least one driver region, said picture elements being arranged in said pixel region; driving means formed in the at least one driver region for driving said field effect transistors, the driving means including at least a shift register having CMOS thin film transistors; and a passivation film having a thickness of at least about 1 μm formed on the driver region and not formed on the pixel region.
Claim 25
Dependent Claim
62 words
The projection type color display device of claim 20, further comprising: an insulating film having a thickness of about 3000 Å or less formed on the pixel region and the driver region; and a liquid crystal material formed on the insulating film in the pixel region, the insulating film in the pixel region preventing DC voltage application to the liquid crystal material.
Claim 26
Dependent Claim
23 words
The projection type color display device of claim 21, wherein the passivation film is formed over the insulating film in the driver region.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |