Patent US3266829A successfully refreshed from Google Patents.
Patent US6086208A successfully refreshed from Google Patents.
US6086208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light valve projector apparatus and technique
Assignee: Florida Atlantic University
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Filing: 1998-12-07
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Granted: 2000-07-11
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Expires: 2018-12-07
Abstract
Abstract A method is disclosed for displaying images represented by electronic image information, including the following steps: providing a light source; optically modulating light from the light source, the optical modulation utilizing a pixel pattern and a diffraction grating, the pixel pattern being modulated with the image information; providing a schlieren optical system for operating on the optically modulated light; and displaying an output of the schlieren optical system; the diffraction grating being provided with a grating spacing that differs from the pixel spacing of the pixel pattern by an odd multiple of half the grating spacing.
Inventors
- 👤 William E. Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:15
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/18; G02B5/1866; G02B27/00; G02B27/10; G02B27/1006; G02B27/102; G02B27/1046; G02B27/14; G02B27/145; G02B27/42; G02B27/4233; G02B27/4244; H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; H04N5/7441
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
93 words
Apparatus for displaying images represented by electronic image information, comprising: a light source; means for optically modulating, with image information, light from said light source, said modulating means having a pixel pattern and a diffraction grating, the pixel pattern being modulated with said image information; a schlieren optical system for operating on said optically modulated light; and means for displaying an output of said schlieren optical system; said diffraction grating having a grating spacing that differs from the pixel spacing of said pixel pattern by an odd multiple of half the grating spacing.
Claim 2
Dependent Claim
93 words
Apparatus for displaying images represented by electronic image information, comprising: a light source; means for optically modulating, with image information, light from said light source, said modulating means having a pixel pattern and a diffraction grating, the pixel pattern being modulated with said image information; a schlieren optical system for operating on said optically modulated light; and means for displaying an output of said schlieren optical system; said diffraction grating having a grating spacing that differs from the pixel spacing of said pixel pattern by an odd multiple of half the grating spacing.
Claim 3
Dependent Claim
43 words
Apparatus as defined by claim 1, wherein said pixel spacing is S p , said grating spacing is S G , and said grating spacing is related to said pixel spacing by S.sub.G =(2/m)S.sub.p where m=1, 3, 5, 7 . . . .
Claim 4
Dependent Claim
22 words
Apparatus as defined by claim 2, wherein said grating spacing is related to said pixel spacing by S G =2S p .
Claim 5
Dependent Claim
15 words
Apparatus as defined by claim 2, wherein said pixel pattern is a pixel electrode pattern.
Claim 6
Dependent Claim
15 words
Apparatus as defined by claim 3, wherein said pixel pattern is a pixel electrode pattern.
Claim 7
Dependent Claim
18 words
Apparatus as defined by claim 2, wherein said optical modulating means includes at least one liquid crystal panel.
Claim 8
Dependent Claim
18 words
Apparatus as defined by claim 4, wherein said optical modulating means includes at least one liquid crystal panel.
Claim 9
Dependent Claim
18 words
Apparatus as defined by claim 5, wherein said optical modulating means includes at least one liquid crystal panel.
Claim 10
Dependent Claim
26 words
Apparatus as defined by claim 6, wherein said at least one liquid crystal panel comprises a plurality of liquid crystal panels corresponding to respective different colors.
Claim 11
Dependent Claim
26 words
Apparatus as defined by claim 7, wherein said at least one liquid crystal panel comprises a plurality of liquid crystal panels corresponding to respective different colors.
Claim 12
Dependent Claim
26 words
Apparatus as defined by claim 8, wherein said at least one liquid crystal panel comprises a plurality of liquid crystal panels corresponding to respective different colors.
Claim 13
Independent Claim
94 words
A method for displaying images represented by electronic image information, comprising the steps of: providing a light source; optically modulating light from said light source, said optical modulation utilizing a pixel pattern and a diffraction grating, the pixel pattern being modulated with said image information; providing a schlieren optical system for operating on said optically modulated light; and displaying an output of said schlieren optical system; said diffraction grating being provided with a grating spacing that differs from the pixel spacing of said pixel pattern by an odd multiple of half the grating spacing.
Claim 14
Independent Claim
94 words
A method for displaying images represented by electronic image information, comprising the steps of: providing a light source; optically modulating light from said light source, said optical modulation utilizing a pixel pattern and a diffraction grating, the pixel pattern being modulated with said image information; providing a schlieren optical system for operating on said optically modulated light; and displaying an output of said schlieren optical system; said diffraction grating being provided with a grating spacing that differs from the pixel spacing of said pixel pattern by an odd multiple of half the grating spacing.
Claim 15
Dependent Claim
44 words
The method as defined by claim 12, wherein said pixel spacing is S p , said grating spacing is S G , and said grating spacing is related to said pixel spacing by S.sub.G =(2/m)S.sub.p where m=1, 3, 5, 7 . . . .
Claim 16
Dependent Claim
23 words
The method as defined by claim 12, wherein said grating spacing is related to said pixel spacing by S G =2S p .
Claim 17
Dependent Claim
23 words
The method as defined by claim 12, wherein said step of optically modulating comprises optically modulating with at least one liquid crystal panel.
Claim 18
Dependent Claim
23 words
The method as defined by claim 13, wherein said step of optically modulating comprises optically modulating with at least one liquid crystal panel.
Claim 19
Dependent Claim
35 words
The method as defined by claim 15, wherein said step of optically modulating with at least one liquid crystal panel comprises optically modulating with a plurality of liquid crystal panels corresponding to respective different colors.
Claim 20
Dependent Claim
35 words
The method as defined by claim 16, wherein said step of optically modulating with at least one liquid crystal panel comprises optically modulating with a plurality of liquid crystal panels corresponding to respective different colors.
Claim 21
Dependent Claim
32 words
The method as defined by claim 12, wherein said step of optically modulating utilizing a pixel pattern and a diffraction grating comprises providing a diffraction grating formed by an electrostatically deflected medium.
Claim 22
Dependent Claim
32 words
The method as defined by claim 13, wherein said step of optically modulating utilizing a pixel pattern and a diffraction grating comprises providing a diffraction grating formed by an electrostatically deflected medium.
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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) | 2003-07-11 | 2004-01-10 | 2004-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-11 | 2008-01-10 | 2008-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-11 | 2012-01-10 | 2012-07-11 | $7700.00 | Window Closed / Lapsed |