Patent US5632545A successfully refreshed from Google Patents.
US5632545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhanced video projection system
Assignee: Intellectual Ventures I LLC
•
Filing: 1996-07-26
•
Granted: 1997-05-27
•
Expires: 2016-07-26
Abstract
Abstract A color video projector system has separate light sources for producing separate beams of light which are passed each first through color filters to provide separate color beams before being processed by video-controlled light shutter matrices and then combined into a single beam projectable to provide a full-color video display with superimposed color spots rather then side-by-side color spots. In a preferred embodiment the color beams are red, green, and blue.
Inventors
- 👤 Dan Kikinis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:31
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/312; H04N9/3105; H04N9/3141; H04N9/315; H04N9/3155; H04N9/3164
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A video projector system comprising: individual light sources, one each for each color to be projected, adapted to provide each a separate light beam; a lens system in the path of the separate light beams, adapted for focusing the beams; a number of individual color filters equal to the number of beams, in the colors to be projected, and placed one each in each beam path; a light-shutter matrix system comprising a number of equivalent switching matrices equal to the number of beams and placed one each in the beam paths; a video controller adapted for controlling the light-shutter matrices; and an optical combination system adapted for combining the several beams into a single composite beam for projection on a surface to provide a video display; wherein each beam passes through a color filter before being processed by a light-switching matrix.
Claim 2
Dependent Claim
141 words
A video projector system comprising: individual light sources, one each for each color to be projected, adapted to provide each a separate light beam; a lens system in the path of the separate light beams, adapted for focusing the beams; a number of individual color filters equal to the number of beams, in the colors to be projected, and placed one each in each beam path; a light-shutter matrix system comprising a number of equivalent switching matrices equal to the number of beams and placed one each in the beam paths; a video controller adapted for controlling the light-shutter matrices; and an optical combination system adapted for combining the several beams into a single composite beam for projection on a surface to provide a video display; wherein each beam passes through a color filter before being processed by a light-switching matrix.
Claim 3
Dependent Claim
15 words
The video projection system of claim 1 wherein the light-shutter matrices are monochrome LCD arrays.
Claim 4
Dependent Claim
34 words
The video projector system of claim 1 wherein three light sources provide three beams, and red, green, and blue filters are used to provide red, green, and blue beams to an LCD matrix system.
References Cited (Backward Citations)
US4368963A
Cited
US5398086A
Cited
US5481320A
Cited
US5287131A
Cited
US5359345A
Cited
US5555035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-05-26 | 2000-11-25 | 2001-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-26 | 2004-11-25 | 2005-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-26 | 2008-11-25 | 2009-05-27 | $7700.00 | Window Closed / Lapsed |