US4518225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicolored liquid crystal displays utilizing photoluminescent transflectors and mask
Assignee: Boeing North American Inc
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Filing: 1983-04-11
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Granted: 1985-05-21
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Expires: 2003-04-11
Abstract
Abstract A brilliant liquid crystal display having the capability of a wide variety of coloration is disclosed utilizing a photoluminescent transflector for concentrating the internal light and ambient light into a narrow frequency range which is coordinated with the dye selected for the liquid crystal, resulting in an enhanced brightness for the display. Masking all regions of the liquid crystal display except for the selectively annunciating segments thereof, the resultant display is capable of a broad range of colors having a significantly enhanced luminance characteristic.
Inventors
- 👤 Lee R. Fredrickson
- 👤 Michael R. Cascini
- 👤 Donald E. Mosier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:33
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133553; G02F1/133555; G02F2203/00; G02F2203/09
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A liquid crystal display for an aircraft having a segmented display configuration in a first region having a segmented readout and having a second region comprising in combination: a. a liquid crystal material having a dye with blue light attenuation characteristics in darkened portions thereof; b. a photoluminescent transflector disposed in a spaced parallel relationship with said liquid crystal material; c. a mask disposed interjacent said liquid crystal material and said transflector, forming a spacing means therein, and having a configuration conforming substantially with said second region of said display; and d. a light source disposed on a side opposite said mask, whereby said liquid crystal material, said photoluminescent transflector, and said light source have coordinated emission characteristics.
Claim 2
Dependent Claim
118 words
A liquid crystal display for an aircraft having a segmented display configuration in a first region having a segmented readout and having a second region comprising in combination: a. a liquid crystal material having a dye with blue light attenuation characteristics in darkened portions thereof; b. a photoluminescent transflector disposed in a spaced parallel relationship with said liquid crystal material; c. a mask disposed interjacent said liquid crystal material and said transflector, forming a spacing means therein, and having a configuration conforming substantially with said second region of said display; and d. a light source disposed on a side opposite said mask, whereby said liquid crystal material, said photoluminescent transflector, and said light source have coordinated emission characteristics.
Claim 3
Dependent Claim
19 words
A display as in claim 1 wherein said transflector has a spectral peak emission between 540 and 650 nanometers.
Claim 4
Dependent Claim
37 words
A liquid crystal display as in claim 1 further comprising an electroluminescent light source having a spectral emission characteristic with a first peak between 450 and 520 nanometers, and a second peak between 550 and 600 nanometers.
Claim 5
Dependent Claim
119 words
A liquid crystal display for an aircraft having a segmented display configuration in a first region having a segmented readout and having a second region comprising in combination: a. a liquid crystal material having a dye with red light attenuation characteristics in darkened portions thereof; b. a photoluminescent transflector disposed in a spaced parallel relationship with said liquid crystal material; c. a mask disposed interjacent said liquid crystal material and said transflector, forming a spacing means therein, and having a configuration conforming substantially with said second region of said display; and d. a light source disposed on a side opposite said photoluminescent transflector, whereby said liquid crystal material, said photoluminescent transflector, and said light source have coordinated emission characteristics.
Claim 6
Dependent Claim
119 words
A liquid crystal display for an aircraft having a segmented display configuration in a first region having a segmented readout and having a second region comprising in combination: a. a liquid crystal material having a dye with red light attenuation characteristics in darkened portions thereof; b. a photoluminescent transflector disposed in a spaced parallel relationship with said liquid crystal material; c. a mask disposed interjacent said liquid crystal material and said transflector, forming a spacing means therein, and having a configuration conforming substantially with said second region of said display; and d. a light source disposed on a side opposite said photoluminescent transflector, whereby said liquid crystal material, said photoluminescent transflector, and said light source have coordinated emission characteristics.
Claim 7
Dependent Claim
19 words
A display as in claim 4 wherein said transflector has a spectral peak emission between 400 and 525 nanometers.
Claim 8
Dependent Claim
37 words
A liquid crystal display as in claim 4 further comprising an electroluminescent light source having a spectral emission characteristic with a first peak between 450 and 520 nanometers, and a second peak between 550 and 600 nanometers.
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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) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |