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Patent US4425029A successfully refreshed from Google Patents.
US4425029A
Expired / Lapsed
US
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Fluorescent liquid crystal display devices
Assignee: Sharp Corp
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Filing: 1981-03-23
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Granted: 1984-01-10
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Expires: 2001-03-23
Abstract
Abstract A fluorescent liquid crystal display of the type for reflecting radiation comprises a fluorescent material contained within a liquid crystal material for providing fluorescence in response to absorbance, and a filter element for reflecting at least one of the fluorescence and the absorbance and, if necessary, for showing low reflection in connection with radiation except for the at least one of the fluorescence and the absorbance to thereby enhance display contrast of the display.
Inventors
- 👤 Fumiaki Funada
- 👤 Masataka Matsuura
- 👤 Tomio Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:19
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/13762
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
A fluorescent liquid crystal display of the type for reflecting radiation comprising: a fluorescent material contained within a liquid crystal material for providing fluorescence in response to absorbance, the wavelength band of the fluorescence being apart from that of the absorbance absorbed by the fluorescent material; and filter means for reflecting the absorbance and the fluorescence to enhance display contrast of the fluorescent liquid crystal display.
Claim 2
Dependent Claim
66 words
A fluorescent liquid crystal display of the type for reflecting radiation comprising: a fluorescent material contained within a liquid crystal material for providing fluorescence in response to absorbance, the wavelength band of the fluorescence being apart from that of the absorbance absorbed by the fluorescent material; and filter means for reflecting the absorbance and the fluorescence to enhance display contrast of the fluorescent liquid crystal display.
Claim 3
Dependent Claim
26 words
The display according to claim 1, wherein said filter means is for showing low reflection in connection with radiation except for the absorbance and the fluorescence.
Claim 4
Dependent Claim
29 words
The display according to claim 1, wherein the filter means is positioned between a display side substrate and a counter substrate defining a container for the liquid crystal material.
Claim 5
Dependent Claim
32 words
The display according to claim 1, wherein the filter means is positioned behind a counter substrate opposed to a display side substrate, the substrates defining a container for the liquid crystal material.
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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |