US4166233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphor screen for flat panel color display
Assignee: RCA Licensing Corp
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Filing: 1977-06-13
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Granted: 1979-08-28
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Expires: 1997-06-13
Abstract
Abstract Across the screen is a mosaic of phosphor bodies which will emit light of different colors when excited by electrons. Phosphors which will emit three different colors, e.g. red, green and blue, are used and are disposed in a regular repetitive array of groups of three, i.e. triads. In every other triad the phosphor body which emits the color which has the least acuity to the eye, e.g. blue, is replaced by a nonluminescent black material. This black material is used to hide the edges of a support wall which extends to the screen.
Inventors
- 👤 Thomas O. Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:39
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; H01J29/325
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A flat display device comprising an evacuated envelope having a plurality of spaced supports which contact a screen bearing wall of the envelope, said screen including a mosaic of repetitive groups of different color emitting phosphor bodies with a selective one of the same color emitting phosphor bodies of some of the groups being replaced by a body of a nonluminous material, each of the supports being positioned at a separate nonluminous material body.
Claim 2
Dependent Claim
74 words
A flat display device comprising an evacuated envelope having a plurality of spaced supports which contact a screen bearing wall of the envelope, said screen including a mosaic of repetitive groups of different color emitting phosphor bodies with a selective one of the same color emitting phosphor bodies of some of the groups being replaced by a body of a nonluminous material, each of the supports being positioned at a separate nonluminous material body.
Claim 3
Dependent Claim
18 words
A flat display device in accordance with claim 1 in which the nonluminous material is a black material.
Claim 4
Dependent Claim
35 words
A flat display device in accordance with claim 2 in which the color emitting phosphor body which is periodically replaced by the black material is the color which has the least acuity to the eye.
Claim 5
Dependent Claim
43 words
A flat display device in accordance with claim 3 in which the color emitting phosphor bodies in each group are red, blue and green emitting phosphors and the color which is periodically replaced by the black nonluminous material is the blue emitting phosphor.
Claim 6
Dependent Claim
28 words
A flat display device in accordance with claim 4 in which each of the blue emitting phosphor bodies and the black material bodies are of the same width.
Claim 7
Dependent Claim
35 words
A flat display device in accordance with claim 5 in which the blue emitting phosphor bodies and the black bodies are of a different width from that of the red and green emitting phosphor bodies.
Claim 8
Dependent Claim
30 words
A flat display device in accordance with claim 6 in which the blue emitting phosphor bodies and the black bodies are wider than the red and green emitting phosphor bodies.
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) | 1982-08-27 | 1983-02-26 | 1983-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-27 | 1987-02-26 | 1987-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-27 | 1991-02-26 | 1991-08-28 | $7700.00 | Window Closed / Lapsed |