Patent US5214521A successfully refreshed from Google Patents.
US5214521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma addressed liquid crystal display with grooves in middle plate
Assignee: Samsung SDI Co Ltd
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Filing: 1992-07-14
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Granted: 1993-05-25
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Expires: 2012-07-14
Abstract
Abstract A plasma addressed liquid crystal display in which the structure of the plasma address portion is improved is disclosed. In the plasma address portion of the present liquid crystal display, a plurality of independent parallel discharge spaces are formed by the grooves formed on a middle plate, and each pair of second electrodes formed by a screen printing are formed to be opposed on the groove. The liquid crystal display has advantages of easy manufacturing of a low cost.
Inventors
- 👤 Ki-Duck Kwon
- 👤 Seung-Woo Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:19
CPC Classifications
H; H01; H01J; H01J11/00; H01J11/20; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/13334; H01J11/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
A plasma addressed liquid crystal display comprising: a transparent front plate, a middle and rear plate each separated by predetermined distance; a plurality of parallel stripe-like first electrodes and a liquid crystal layer sequentially provided on said front plate; grooves formed on said middle plate which include an open portion which faces said rear plate said grooves extending perpendicular to said first electrodes, said middle plate and said rear plate attached together such that discharge spaces are defined by said grooves and a flat surface of said rear plate, said discharge spaces filled with an ionizable gas; and at least two electrodes spaced from each other on said rear plate disposed within each of said grooves wherein the ionizable gas and said first electrodes cooperate to form an addressing matrix.
Claim 2
Dependent Claim
130 words
A plasma addressed liquid crystal display comprising: a transparent front plate, a middle and rear plate each separated by predetermined distance; a plurality of parallel stripe-like first electrodes and a liquid crystal layer sequentially provided on said front plate; grooves formed on said middle plate which include an open portion which faces said rear plate said grooves extending perpendicular to said first electrodes, said middle plate and said rear plate attached together such that discharge spaces are defined by said grooves and a flat surface of said rear plate, said discharge spaces filled with an ionizable gas; and at least two electrodes spaced from each other on said rear plate disposed within each of said grooves wherein the ionizable gas and said first electrodes cooperate to form an addressing matrix.
Claim 3
Dependent Claim
30 words
A plasma addressed liquid crystal display as claimed in claim 1, wherein one of said at least two electrodes is formed on said rear plate by a silk screen method.
Claim 4
Dependent Claim
22 words
A plasma addressed liquid crystal display as claimed in claim 2, wherein one of said at least two electrodes comprises nickel paste.
Claim 5
Dependent Claim
200 words
A plasma addressed liquid crystal display comprising: a transparent front plate; a middle plate spaced from said front plate by a predetermined distance; a plurality of parallel stripe-like first electrodes provided on a surface of said front plate; a liquid crystal layer sandwiched between said front plate and said middle plate; a plurality of grooves formed in said middle plate extending parallel to each other and perpendicular to said first stripe-like electrodes; a rear plate attached to said middle plate such that a surface of said rear plate faces said plurality of grooves thus defining a plurality of discharge spaces, the discharge spaces being filled with ionizable gas; a plurality of first electrodes disposed on the surface of said rear plate that faces said plurality grooves such that each of said plurality of first electrodes is disposed within one of said plurality of grooves; and a plurality of second electrodes disposed on the surface of said rear plate that faces said plurality of grooves such that each of said plurality of second electrodes is disposed within one of said plurality of grooves, said ionizable gas and said first electrodes cooperating to form an addressing matrix for said liquid crystal layer.
Claim 6
Dependent Claim
200 words
A plasma addressed liquid crystal display comprising: a transparent front plate; a middle plate spaced from said front plate by a predetermined distance; a plurality of parallel stripe-like first electrodes provided on a surface of said front plate; a liquid crystal layer sandwiched between said front plate and said middle plate; a plurality of grooves formed in said middle plate extending parallel to each other and perpendicular to said first stripe-like electrodes; a rear plate attached to said middle plate such that a surface of said rear plate faces said plurality of grooves thus defining a plurality of discharge spaces, the discharge spaces being filled with ionizable gas; a plurality of first electrodes disposed on the surface of said rear plate that faces said plurality grooves such that each of said plurality of first electrodes is disposed within one of said plurality of grooves; and a plurality of second electrodes disposed on the surface of said rear plate that faces said plurality of grooves such that each of said plurality of second electrodes is disposed within one of said plurality of grooves, said ionizable gas and said first electrodes cooperating to form an addressing matrix for said liquid crystal layer.
Claim 7
Dependent Claim
28 words
A plasma addressed liquid crystal display as claimed in claim 4 wherein said plurality of second electrodes are formed on the rear plate by a silk screen method.
Claim 8
Dependent Claim
19 words
A plasma addressed liquid crystal display as claimed in claim 5, wherein said second electrode comprises a nickel paste.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |