US4606613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display device containing laser-absorbing dye
Assignee: Sony Corp
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Filing: 1984-04-25
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Granted: 1986-08-19
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Expires: 2004-04-25
Abstract
Abstract A liquid crystal display device comprising a laser beam source, a liquid crystal cell so formed that a liquid crystal layer in which a liquid crystal of cyano-biphenyl system is added with a dichromatic dye of 1,3 di (1,4-dimethyl-7-isopropylazulenyl)-cyclobutene diylium having a formula ##STR1## is interposed between opposing transparent electrode plates, and means for irradiating to the cell a laser beam generated from the laser beam source.
Inventors
- 👤 Tetsuo Urabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:34
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A liquid crystal display device comprising a laser beam source, a liquid crystal cell so formed that a liquid crystal layer in which a liquid crystal of cyano-biphenyl system is added with a dichromatic dye of 1,3 di (1,4-dimethyl-7-isopropylazulenyl)-cyclobutene diylium having a formula ##STR3## is interposed between opposing transparent electrode plates, and means for irradiating to said cell a laser beam generated from said laser beam source.
Claim 2
Dependent Claim
67 words
A liquid crystal display device comprising a laser beam source, a liquid crystal cell so formed that a liquid crystal layer in which a liquid crystal of cyano-biphenyl system is added with a dichromatic dye of 1,3 di (1,4-dimethyl-7-isopropylazulenyl)-cyclobutene diylium having a formula ##STR3## is interposed between opposing transparent electrode plates, and means for irradiating to said cell a laser beam generated from said laser beam source.
References Cited (Backward Citations)
US4040047A
Cited
US4465338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |