US5833338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projector
Assignee: Unic View Ltd
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Filing: 1995-10-13
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Granted: 1998-11-10
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Expires: 2015-10-13
Abstract
Abstract A projector including a non-polarized light source, a polarizing beam-splitter receiving light from the non-polarized light source and a selectably actuable polarization rotating light valve having light polarized in one sense from the polarizing beam-splitter impinging thereon from a first direction and having light polarized in an opposite sense from the polarizing beam-splitter impinging thereon from a second direction.
Inventors
- 👤 Shlomo Barak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:32
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/283; G03; G03B; G03B21/00; G03B21/14; G02B27/10; G02B27/12; G02B27/123; G02B27/126; G02B27/14; G02B27/145; G02B27/148; G02B27/149; H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441; H04N9/00; H04N9/12; H04N9/31; H04N9/3141; H04N9/315; H04N9/3167
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
107 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; an additional beam splitter operative to filter out unwanted residual polarized light thereby enhancing contrast; and a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense, and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 2
Dependent Claim
107 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; an additional beam splitter operative to filter out unwanted residual polarized light thereby enhancing contrast; and a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense, and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 3
Dependent Claim
38 words
A projector according to claim 1 and wherein said light valves are monochromatic and also including a device for sequentially transmitting the R, G and B spectral components of the beam, onto at least one polarizing beam splitter.
Claim 4
Dependent Claim
101 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense; and prism/lens combination arrays disposed upstream of said light valves; and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 5
Dependent Claim
101 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense; and prism/lens combination arrays disposed upstream of said light valves; and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 6
Dependent Claim
101 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense; and lens combination arrays disposed upstream of said light valves; and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 7
Dependent Claim
101 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense; and lens combination arrays disposed upstream of said light valves; and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 8
Dependent Claim
96 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense; and apparatus for providing depixilization; and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 9
Dependent Claim
96 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense; and apparatus for providing depixilization; and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 10
Dependent Claim
100 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense; and apparatus for providing interlaced images with enhanced resolution; and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 11
Dependent Claim
100 words
A projector comprising: a non-polarized light source; a pair of polarizing beam splitters receiving light from said non-polarized light source; a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter which is polarized in a different sense; and apparatus for providing interlaced images with enhanced resolution; and wherein said pair of polarizing beam splitters includes first and second polarizing beam-splitters, said second polarizing beam splitter receiving light split from the first polarizing beam-splitter and said pair of selectably actuable polarization rotating light valves includes first and second selectably actuable polarization rotating light valves.
Claim 12
Dependent Claim
52 words
A projector comprising: a non-polarized light source; at least one polarizing beam-splitter receiving light from said non-polarized light source; and a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter, wherein the pair of selectably actuable polarization rotating light valves operate in a reflective mode.
Claim 13
Dependent Claim
52 words
A projector comprising: a non-polarized light source; at least one polarizing beam-splitter receiving light from said non-polarized light source; and a pair of selectably actuable polarization rotating light valves having impinging thereon light from the polarizing beam-splitter, wherein the pair of selectably actuable polarization rotating light valves operate in a reflective mode.
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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) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-09 | 2010-05-11 | 2010-11-10 | $7700.00 | Window Closed / Lapsed |