Patent US4630894A successfully refreshed from Google Patents.
US4630894A
Expired / Lapsed
US
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Multi-colored liquid crystal display with color transflector and color filter
Assignee: Borg Instruments AG
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Filing: 1984-03-20
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Granted: 1986-12-23
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Expires: 2004-03-20
Abstract
Abstract A multi-colored liquid crystal display arrangement, especially for motor vehicle instruments, including colored foils with different colorings spatially associated with a plurality of mutually offset and differing information areas of the display, intermediate a liquid crystal cell and a large-surfaced illuminating arrangement. The multi-colored liquid display arrangement is additionally equipped with a transflector which is positioned between the color foils and the liquid crystal cell, and wherein the transflector incorporates differently colored areas which are spatially associated with predetermined color foils.
Inventors
- 👤 Rolf A. Cremers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; B; B60; B60Q; B60Q3/00; B60Q3/10; B60Q3/14; B60K; B60K2360/00; B60K2360/20; B60K2360/33; B60K2360/336; G02F1/133377; G02F2203/00; G02F2203/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A multi-colored liquid crystal display device comprising: a plurality of offset information areas; a liquid crystal cell; an illuminating device extending substantially over the entire display device; a plurality of colored foils having different colorings, said foils being spaced from and interposed between said liquid crystal cell and said illuminating device in alignment with respective information areas; and a white or bright metallic transflector arranged intermediate and spaced from said colored foils and said liquid crystal cell, said transflector having different colored areas in alignment with specific colored foils; whereby light from said illuminating device passes through said colored foils and then through the colored areas of the transflector to said liquid crystal cell to illuminate said information areas and light from the environment passes through said liquid crystal cell and is reflected by the colored areas of said transflector back through said liquid crystal cell to illuminate said information areas.
Claim 2
Dependent Claim
151 words
A multi-colored liquid crystal display device comprising: a plurality of offset information areas; a liquid crystal cell; an illuminating device extending substantially over the entire display device; a plurality of colored foils having different colorings, said foils being spaced from and interposed between said liquid crystal cell and said illuminating device in alignment with respective information areas; and a white or bright metallic transflector arranged intermediate and spaced from said colored foils and said liquid crystal cell, said transflector having different colored areas in alignment with specific colored foils; whereby light from said illuminating device passes through said colored foils and then through the colored areas of the transflector to said liquid crystal cell to illuminate said information areas and light from the environment passes through said liquid crystal cell and is reflected by the colored areas of said transflector back through said liquid crystal cell to illuminate said information areas.
Claim 3
Dependent Claim
57 words
Display arrangement as claimed in claim 1, wherein said liquid crystal cells include a plurality of mutally-bounded chambers, said chambers being in a spatial relationship with specific colored foils, said chambers being filled with different liquid crystal material blends in accordance with the maximum absorption of the color of the transmission light from the respective colored foil.
Claim 4
Dependent Claim
23 words
Display arrangement as claimed in claim 2, wherein said blends include concentration of color-correlated dichroic coloring materials in the range of 1% -2%.
Claim 5
Dependent Claim
40 words
Display arrangement as claimed in claim 2 wherein said liquid crystal material blends have an optical anisotropy chosen to optimize the contrast of the environmental light and the color of the information area for a predetermined liquid crystal cell thickness.
Claim 6
Dependent Claim
27 words
Display arrangement as claimed in claim 1, wherein said colored transflector areas comprise color imprints on the surface of said transflector facing towards the liquid crystal cell.
Claim 7
Dependent Claim
26 words
Display arrangement as claimed in claim 1, wherein said transflector includes at least one colored area of the same color as the correspondingly aligned colored foil.
Claim 8
Dependent Claim
32 words
Display arrangement as claimed in claim 3, comprising adhesive tapes being arranged intermediate a front disc and a back disc of said liquid crystal cell so as to define said mutually-bounded chambers.
Claim 9
Dependent Claim
21 words
Display arrangement as claimed in claim 1, wherein said crystal cell includes an analyzer having a rough lacquer layer imposed thereon.
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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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |