US4732441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oriented-reflection reflective mirror screen
Assignee: Individual
•
Filing: 1987-05-14
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Granted: 1988-03-22
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Expires: 2007-05-14
Abstract
Abstract A reflective mirror screen for reflecting light projected from a CRT through a convex lens or from other projectors to only a specific observing area comprising a plurality of strips with parabolic surface or paraboloids. The principal axis of each parabolic surface or paraboloic is directed to the specific area located frontward of the reflective mirror screen so as to reflect the light projected thereon to the predetermined observing area. Any light projecting on the oriented-reflection reflective mirror screen will not be reflected to the specific observing area if the light does not come from the visual images projector or its adjacent area. Then, the people in the observing area will feel brighter image and relative little light interference than from conventional screens.
Inventors
- 👤 Teh-Yao Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/602
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
An oriented-reflection reflective mirror screen for reflecting visual images projected from preset images to a specific observing area, comprising a reflective surface provided with a plurality of vertical or horizontal abutted strips having conic surfaces which are formed so as to reflect visual images projected thereon to said specific observing area which is located substantially frontward from the reflective mirror screen.
Claim 2
Dependent Claim
61 words
An oriented-reflection reflective mirror screen for reflecting visual images projected from preset images to a specific observing area, comprising a reflective surface provided with a plurality of vertical or horizontal abutted strips having conic surfaces which are formed so as to reflect visual images projected thereon to said specific observing area which is located substantially frontward from the reflective mirror screen.
Claim 3
Dependent Claim
14 words
The oriented-reflection reflective mirror screen of claim 1, wherein said conic surfaces are parabolic.
Claim 4
Dependent Claim
15 words
The oriented-reflection reflective mirror screen of claim 1, wherein said reflective mirror screen is planar.
Claim 5
Dependent Claim
15 words
The oriented-reflection reflective mirror screen of claim 1, wherein said reflective mirror screen is concave.
Claim 6
Dependent Claim
14 words
The oriented-reflection reflective mirror screen of claim 2, wherein said parabolic surfaces are convex.
Claim 7
Dependent Claim
14 words
The oriented-reflection reflective mirror screen of claim 2, wherein said parabolic surfaces are concave.
Claim 8
Dependent Claim
70 words
An oriented-reflection reflective mirror screen for reflecting visual images projected from preset images to a specific observing area, comprising a reflective surface provided with a matric of a plurality of square grids, the surface of each square grid being a conic surface and said conic surface being formed so as to reflect visual images projected thereon to said specific observing area located substantially frontward from said oriented-reflection reflective mirror screen.
Claim 9
Dependent Claim
70 words
An oriented-reflection reflective mirror screen for reflecting visual images projected from preset images to a specific observing area, comprising a reflective surface provided with a matric of a plurality of square grids, the surface of each square grid being a conic surface and said conic surface being formed so as to reflect visual images projected thereon to said specific observing area located substantially frontward from said oriented-reflection reflective mirror screen.
Claim 10
Dependent Claim
14 words
The oriented-reflection reflective mirror screen of claim 7, wherein said conic surface is paraboloid.
Claim 11
Dependent Claim
15 words
The oriented-reflection reflective mirror screen of claim 7, wherein said reflective mirror screen is planar.
Claim 12
Dependent Claim
15 words
The oriented-reflection reflective mirror screen of claim 7, wherein said reflective mirror screen is concave.
Claim 13
Dependent Claim
13 words
The oriented-reflection reflective mirror screen of claim 8, wherein the paraboloids are convex.
Claim 14
Dependent Claim
13 words
The oriented-reflection reflective mirror screen of claim 8, wherein the paraboloids are concave.
References Cited (Backward Citations)
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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) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |