Patent US3560636A successfully refreshed from Google Patents.
US3560636A
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Color display system
Assignee: Texas Instruments Inc
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Filing: 1967-04-06
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Granted: 1971-02-02
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Expires: 1987-04-06
Abstract
Abstract Color display systems are described for producing polychromatic color images from two different color records corresponding to two substantially different respective hues, one color record effecting the production of an image portion in relatively long wavelength or red light, while the other image portion is produced in white light having a color temperature between about 2800* to 3600* K. Phosphor materials which produce white light of this desired spectral composition and quality are disclosed as having a relative luminosity ratio of IR:IG:IB congruent 0.4/0.56/0.04.
Inventors
- 👤 Carl A Barlow Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:30
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/27
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
A color display system for producing color images from two records, a said system comprising: a viewing screen including a first phosphor material which when energized emits light of relatively lone wavelengths, a second phosphor material which when energized emits light of wavelengths generally shorter than that emitted by said first phosphor; means for energizing said first phosphor material in response to a first record thereby to produce a corresponding image in light of said relatively long wavelengths; and means for independently simultaneously energizing both said first and second phosphor materials in response to a second record thereby to produce a corresponding image in achromatic light having a color temperature between about 2800* and 3600* K.
Claim 2
Dependent Claim
116 words
A color display system for producing color images from two records, a said system comprising: a viewing screen including a first phosphor material which when energized emits light of relatively lone wavelengths, a second phosphor material which when energized emits light of wavelengths generally shorter than that emitted by said first phosphor; means for energizing said first phosphor material in response to a first record thereby to produce a corresponding image in light of said relatively long wavelengths; and means for independently simultaneously energizing both said first and second phosphor materials in response to a second record thereby to produce a corresponding image in achromatic light having a color temperature between about 2800* and 3600* K.
Claim 3
Dependent Claim
50 words
A color display system as set forth in claim 1 in which said first phosphor material emits red light and the second phosphor material is a mixture of green and blue light-emitting phosphors, the relative luminosity ratios of the red to the green to the blue phosphors being approximately 0.4:0.56:0.04.
Claim 4
Dependent Claim
30 words
A color display system as set forth in claim 1 in which the second phosphor material has an electron energization threshold substantially higher than that of said first phosphor 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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |