US6313867B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic display apparatus
Assignee: US Philips Corp
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Filing: 1998-03-23
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Granted: 2001-11-06
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Expires: 2018-03-23
Abstract
Abstract An image projector ( 15 ) includes a plurality of display units ( 20 - 1, 20 - 2, 20 - 3 ) each having a pair of transmission-type display panels ( 21 -L, 21 -R) which are driven by video signals (VS-L, VS-R) for respective left and right eyes, and further having a pair of light sources ( 22 -L, 22 -R) for lighting the display panels. A convex lens ( 9 ) directs image containing light from the display units ( 15 ) to a concave mirror ( 12 ) serving as an imaginary screen in front of viewers (V 1 , V 2 ).
Inventors
- 👤 Joji Shimakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:10
CPC Classifications
H; H04; H04N; H04N13/00; H04N13/30; H04N13/302; H04N13/32; G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/35; H04N13/363; H04N13/366; H04N13/368; H04N13/398; H04N13/10; H04N13/189; H04N13/20; H04N13/204; H04N13/239
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
A stereoscopic display apparatus comprising: a plurality of display means each having a pair of display panels which are driven in accordance with video signals for right and left eyes, respectively, which together represent a stereoscopic image; a concave mirror disposed before viewers for serving as an imaginary screen; convex lens means for directing image-containing lights from said plurality of display means to said concave mirror.
Claim 2
Dependent Claim
66 words
A stereoscopic display apparatus comprising: a plurality of display means each having a pair of display panels which are driven in accordance with video signals for right and left eyes, respectively, which together represent a stereoscopic image; a concave mirror disposed before viewers for serving as an imaginary screen; convex lens means for directing image-containing lights from said plurality of display means to said concave mirror.
Claim 3
Dependent Claim
36 words
A stereoscopic display apparatus according to claim 1 , further comprising drive means for separately moving each of said plurality of display means to a desired respective three-dimensional position with respect to said convex lens means.
Claim 4
Dependent Claim
88 words
A stereoscopic display apparatus according to claim 2 , further comprising camera means for shooting viewers present in front of said concave mirror and tracking control means for detecting a position or positions of a head or two eyes of each viewer based on an output from said camera means and for supplying a signal representing the detected positions to said drive means thereby to move each of said display means to a respective one of three-dimensional positions which correspond respectively to positions where the viewers are present.
Claim 5
Dependent Claim
45 words
A stereoscopic display apparatus according to claim 1 , wherein each pair of display panels comprises a pair of transmission-type display plates driven respectively by the video signals for right and left eyes and a light source for supplying light beams to these display plates.
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) | 2004-11-05 | 2005-05-07 | 2005-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-05 | 2009-05-07 | 2009-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-05 | 2013-05-07 | 2013-11-06 | $7700.00 | Window Closed / Lapsed |