Patent US2237080A successfully refreshed from Google Patents.
Patent US4448491A successfully refreshed from Google Patents.
US4448491A
Expired / Lapsed
US
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Image display apparatus
Assignee: Canon Inc
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Filing: 1980-08-05
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Granted: 1984-05-15
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Expires: 2000-08-05
Abstract
Abstract This invention is concerned with an image display apparatus comprising a component capable of image display by an applied voltage sandwiched between a substrate having a driving semiconductor array and a substrate having an electrode film, the substrates facing each other. A space member, a light intercepting member, or a member functioning as both a spacer member and a light intercepting member is disposed on a non-image display portion of the apparatus. Or at least one of the substrate having the electrode film is provided with an overcoating layer and an undercoating layer.
Inventors
- 👤 Yukitoshi Okubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:21
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133382; G02F1/1339; G02F1/13394; G02F1/136; G02F1/1362; G02F1/136209; G02F1/1368; G02F1/13392
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
178 words
A display apparatus comprising: a first substrate having a driving thin film transistor array including a plurality of gate lines insulated from each other, thin film semiconductors isolated from the gate lines by an insulating layer, source lines contacting said thin film semiconductors and insulated from said gate lines, and drain electrodes contacting said thin film semiconductors and serving as picture elements and a second substrate having a counter electrode film, said substrates facing each other, whereby display by an electro-optical change generated between said two substrates may be performed, and wherein a plurality of separate thin films, each covering only a small portion of the total area of said apparatus, are disposed between the first substrate and the second substrate, and are arranged along at least one of said gate lines and said source lines as spacers formed by forming a film of an insulating material different from said insulating layer on at least one of said first and second substrates and then etching said film of the insulating material to form a plurality of said spacers.
Claim 2
Dependent Claim
178 words
A display apparatus comprising: a first substrate having a driving thin film transistor array including a plurality of gate lines insulated from each other, thin film semiconductors isolated from the gate lines by an insulating layer, source lines contacting said thin film semiconductors and insulated from said gate lines, and drain electrodes contacting said thin film semiconductors and serving as picture elements and a second substrate having a counter electrode film, said substrates facing each other, whereby display by an electro-optical change generated between said two substrates may be performed, and wherein a plurality of separate thin films, each covering only a small portion of the total area of said apparatus, are disposed between the first substrate and the second substrate, and are arranged along at least one of said gate lines and said source lines as spacers formed by forming a film of an insulating material different from said insulating layer on at least one of said first and second substrates and then etching said film of the insulating material to form a plurality of said spacers.
Claim 3
Dependent Claim
14 words
The display apparatus of claim 1, wherein the insulating material is a metal oxide.
Claim 4
Dependent Claim
83 words
The display apparatus of claim 2, wherein the metal oxide is selected from the group consisting of SiO, SiO 2 , CeO 2 , ZrO 2 , CoO, MnO 2 , V 2 O 3 , NbO 2 , WO 3 , MoO 3 , TiO 2 , CaOAl 2 O 3 , NiOAl 2 O 3 , CoOCr 2 O 3 , FeOCr 2 O 3 , MnOCr 2 O 3 , CoOFe 2 O 3 and MnOFe 2 O 3 .
Claim 5
Dependent Claim
16 words
The display apparatus of claim 1, wherein the insulating material is an alkaline earth metal halide.
Claim 6
Dependent Claim
24 words
The display apparatus of claim 1, wherein the spacers are disposed at a rate of at least one spacer per square centimeter of area.
Claim 7
Dependent Claim
20 words
The display apparatus of claim 1, wherein a liquid crystal is placed between the first substrate and the second substrate.
Claim 8
Dependent Claim
12 words
The display apparatus of claim 6, wherein the liquid crystal is nematic.
Claim 9
Dependent Claim
13 words
The display apparatus of claim 7, wherein the liquid crystal is twisted nematic.
Claim 10
Dependent Claim
20 words
The display apparatus of claim 1, wherein the thin film semiconductor is composed of CdS, CdSe, Te or amorphous silicon.
Claim 11
Dependent Claim
16 words
The display apparatus of claim 9, wherein the thin film semiconductor is composed of amorphous silicon.
Claim 12
Dependent Claim
34 words
A display apparatus as in claim 1, wherein the contact between the thin film semiconductor and said source line, and the contact between said thin film semiconductor and said drain electrode are ohmic contacts.
Claim 13
Dependent Claim
16 words
The display apparatus of claim 11, wherein the thin film semiconductor is composed of amorphous silicon.
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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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |