US4043638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display mounted behind a front glass
Assignee: US Philips Corp
•
Filing: 1976-06-04
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Granted: 1977-08-23
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Expires: 1996-06-04
Abstract
Abstract An improved liquid crystal display structure mounted behind a transparent cover plate is disclosed. The structure includes an immersion medium filling gaps which exist between the transparent cover plate and the liquid crystal display to reduce undesirable refractions and reflections of light impinging upon the liquid crystal display to improve the legibility of the display. The immersion medium may be transparent silicone oil, a curing silicone rubber, or pre-fabricated lenticular elements of silicone rubber.
Inventors
- 👤 Meinolph Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:01
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133502; G04; G04G; G04G9/00; G04G9/0023; G04G9/0029; G04G9/0035
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A liquid crystal display structure comprising: transparent cover plate means, liquid crystal display means mounted behind said transparent cover plate means so as to define a cavity between said transparent cover plate means and said liquid crystal display means; and, an immersion medium filling said cavity for improving the legibility of said liquid crystal display means.
Claim 2
Dependent Claim
56 words
A liquid crystal display structure comprising: transparent cover plate means, liquid crystal display means mounted behind said transparent cover plate means so as to define a cavity between said transparent cover plate means and said liquid crystal display means; and, an immersion medium filling said cavity for improving the legibility of said liquid crystal display means.
Claim 3
Dependent Claim
19 words
A liquid crystal display structure according to claim 1, wherein: said immersion medium is a transparent, colorless silicone oil.
Claim 4
Dependent Claim
21 words
A liquid crystal display structure according to claim 1, wherein: said immersion medium is a transparent, colorless subsequently curing silicone rubber.
Claim 5
Dependent Claim
22 words
A liquid crystal display structure according to claim 3, wherein: said silicone rubber is a silicone rubber which remains gel-like after curing.
Claim 6
Dependent Claim
19 words
A liquid crystal display structure according to claim 4, wherein: said silicone rubber is pre-fabricated into a lenticular element.
Claim 7
Dependent Claim
25 words
A liquid crystal display structure according to claim 1, further comprising: An anti-reflection coating on the outward facing side of said transparent cover plate means.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |