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US5136407A
Expired / Lapsed
US
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Liquid crystal display having apertures in the electrodes
Assignee: Japan Science and Technology Agency
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Filing: 1991-03-04
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Granted: 1992-08-04
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Expires: 2011-03-04
Abstract
Abstract A dot matrix type liquid crystal display device having two groups of mutually crossing parallel electrodes sandwiching a liquid crystal layer, the electrodes of one group having an aperture at each electrode crossing area along the direction of and centrally at the electrode of the other group. The electric field at the aperture portion is constantly slanted to a predetermined direction to present uniform and wide stable display areas.
Inventors
- 👤 Jean-Frederic Clerc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:11
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; G02F1/1337; G02F1/133707
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A dot matrix type liquid crystal display device comprising: a pair of parallel substrates disposed to face each other; two groups of electrodes disposed on said pair of substrates, respectively, and crossing each other at a plurality of crossing portions when projected normal to one of said substrates, each electrode of said groups of electrodes being elongated and having substantially parallel side edges; an elongated aperture formed in one electrode of one of said two groups of electrodes at a plurality of said crossing portions where another electrode of the other group of said two groups of electrodes crosses said respective one electrode, said elongated apertures each having a long side extending along the sides of said respective another electrode in the direction of elongation of said respective another electrode.
Claim 2
Dependent Claim
130 words
A dot matrix type liquid crystal display device comprising: a pair of parallel substrates disposed to face each other; two groups of electrodes disposed on said pair of substrates, respectively, and crossing each other at a plurality of crossing portions when projected normal to one of said substrates, each electrode of said groups of electrodes being elongated and having substantially parallel side edges; an elongated aperture formed in one electrode of one of said two groups of electrodes at a plurality of said crossing portions where another electrode of the other group of said two groups of electrodes crosses said respective one electrode, said elongated apertures each having a long side extending along the sides of said respective another electrode in the direction of elongation of said respective another electrode.
Claim 3
Dependent Claim
35 words
A dot matrix type liquid crystal display device according to claim 1, wherein electrodes of said one of said two groups of electrodes have a larger width than electrodes of said other group of electrodes.
Claim 4
Dependent Claim
47 words
A dot matrix type liquid crystal display device according to claim 1, wherein each of said elongated apertures is disposed at a given position in a width direction of said another electrode of said other group of electrodes, when projected normal to said one of said substrates.
Claim 5
Dependent Claim
47 words
A dot matrix type liquid crystal display device according to claim 3, wherein each of said elongated apertures is disposed at a central portion in a width direction of said another electrode of said other group of electrodes, when projected normal to said one of said substrates.
Claim 6
Dependent Claim
49 words
A dot matrix type liquid crystal display device according to claim 3, wherein said two groups of electrodes have a gap therebetween at said crossing portions, and each of said elongated apertures has a first width which is at least about twice said gap between said groups of electrodes.
Claim 7
Dependent Claim
74 words
A dot matrix type liquid crystal display device according to claim 4, wherein each electrode of said one group of electrodes has a first width, and wherein said apertures each define side portions in said one electrode adjacent to the longitudinal ends of the respective elongated aperture, and said side portions have a combined second width in a longitudinal direction of the elongated aperture, which is at least about one-fifth of the first width.
References Cited (Backward Citations)
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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) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |