Patent US3810168A successfully refreshed from Google Patents.
US3810168A
Expired / Lapsed
US
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Luminous display panel with geometric segment matrix and diffuser panel
Assignee: Tamura Electric Works Ltd
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Filing: 1972-03-27
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Granted: 1974-05-07
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Expires: 1992-03-27
Abstract
Abstract In a luminous display device of the type comprising a substrate, a plurality of depressions formed in one surface of the substrate, a plurality of lamps disposed in respective depressions and means for selectively lighting the lamps so as to display a selected pattern, there is provided a light diffusing layer covering the depressions.
Inventors
- 👤 R Nishina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:52
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/307
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A luminous display device of the type comprising a substrate, a plurality of depressions formed in one surface of said substrate in the shape of linear segments having tapered ends abutting each other forming a generally rectangular block shaped digit 8 matrix having diagonal separations between said segments, a plurality of lamps disposed in respective depressions, means for selectively lighting said lamps so as to display a selected pattern, and a light diffusing layer in the form of a plurality of diamond prism cuts overlying said depressions, the diagonals of said prism cuts lying generally along the direction of said diagonal separations.
Claim 2
Dependent Claim
102 words
A luminous display device of the type comprising a substrate, a plurality of depressions formed in one surface of said substrate in the shape of linear segments having tapered ends abutting each other forming a generally rectangular block shaped digit 8 matrix having diagonal separations between said segments, a plurality of lamps disposed in respective depressions, means for selectively lighting said lamps so as to display a selected pattern, and a light diffusing layer in the form of a plurality of diamond prism cuts overlying said depressions, the diagonals of said prism cuts lying generally along the direction of said diagonal separations.
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |