Patent US2447628A successfully refreshed from Google Patents.
Patent US5483307A successfully refreshed from Google Patents.
US5483307A
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Wide field of view head-mounted display
Assignee: Texas Instruments Inc
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Filing: 1994-09-29
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Granted: 1996-01-09
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Expires: 2014-09-29
Abstract
Abstract A head-mounted display (10). A spatial light modulator (12) generates the image to be viewed. A projection lens (14) projects the image to a rear projection screen (16), which diffuses the image to accommodate the spacing and size of the viewer's eyes. The image is reflected by a beam splitter (17) to a curved reflector (18) in front of the viewer's eyes. The reflector (18) reflects the image through the beam splitter (17) in parallel rays so that the image appears to be distant, and also magnifies the image to provide a wide field of view.
Inventors
- 👤 Douglas W. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:30
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; G; G02; G02B; G02B26/00; G02B26/08; G02B26/0816; G02B26/0833; G02B27/00; G02B27/01; G02B27/017; G02B27/0172; G02B27/0149; G02B2027/0161
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
156 words
A display to be worn on the head of a viewer, comprising: a spatial light modulator for generating images as a beam of light; a projection lens for receiving the beam of light from said spatial light modulator and for projecting that beam of light to a projection screen; a projection screen for receiving the beam of light from said projecting lens and for providing said images on its output surface, said projection screen being both transmissive and diffusive of said beam of light; a beam splitter in the path of the beam of light from said projection screen; a reflector for receiving the beam of light reflected from said beam splitter and for reflecting said light to the viewer, such that said image appears to be distant with respect to said viewer; an eyepiece in the path of said beam of light from said reflector to said viewer's eyes, said eyepiece having a negative lens.
Claim 2
Dependent Claim
156 words
A display to be worn on the head of a viewer, comprising: a spatial light modulator for generating images as a beam of light; a projection lens for receiving the beam of light from said spatial light modulator and for projecting that beam of light to a projection screen; a projection screen for receiving the beam of light from said projecting lens and for providing said images on its output surface, said projection screen being both transmissive and diffusive of said beam of light; a beam splitter in the path of the beam of light from said projection screen; a reflector for receiving the beam of light reflected from said beam splitter and for reflecting said light to the viewer, such that said image appears to be distant with respect to said viewer; an eyepiece in the path of said beam of light from said reflector to said viewer's eyes, said eyepiece having a negative lens.
Claim 3
Dependent Claim
27 words
The display of claim 1, further comprising a fold mirror in the path of the said beam of light from said projection lens to said projection screen.
Claim 4
Dependent Claim
24 words
The display of claim 1, further comprising a light source for providing illumination for said beam of light generated by said spatial light modulator.
Claim 5
Dependent Claim
15 words
The display of claim 1, wherein said spatial light modulator is a liquid crystal display.
Claim 6
Dependent Claim
15 words
The display of claim 1, wherein said spatial light modulator is a digital micro-mirror device.
Claim 7
Dependent Claim
31 words
The display of claim 1, wherein said reflector magnifies said image in the horizontal direction such that the field of view of said viewer is not less than 60 degrees horizontally.
Claim 8
Dependent Claim
31 words
The display of claim 1, wherein said reflector magnifies said image in the vertical direction such that the field of view of said viewer is not less than 30 degrees vertically.
Claim 9
Dependent Claim
21 words
The display of claim 1, wherein said reflector reflects said beam of light from said beam splitter in nearly parallel rays.
Claim 10
Dependent Claim
29 words
The display of claim 1, further comprising a shutter in the path of light from said viewer's eyes to said reflector for alternately blocking the left and right eye.
Claim 11
Dependent Claim
15 words
The display of claim 2, wherein said mirror magnifies said image with a horizontal concavity.
Claim 12
Dependent Claim
16 words
The display of claim 2, wherein said mirror magnifies said projection lens with a vertical concavity.
Claim 13
Dependent Claim
12 words
The display of claim 1, wherein said projection screen is horizontally concave.
Claim 14
Dependent Claim
12 words
The display of claim 1, wherein said projection screen is vertically concave.
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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) | 1999-01-08 | 1999-07-10 | 2000-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-08 | 2003-07-10 | 2004-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-08 | 2007-07-10 | 2008-01-09 | $7700.00 | Window Closed / Lapsed |