Patent US6266105B1 successfully refreshed from Google Patents.
US6266105B1
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US
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Color projection system incorporation electro-optic light modulator and rotating light-reflective element
Assignee: Philips North America LLC
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Filing: 1998-07-31
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Granted: 2001-07-24
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Expires: 2018-07-31
Abstract
Abstract A color projection system, comprising a rotatable color drum with reflective segments on the surface of the drum, the segments composed of dichroic filters having different color reflection bands, and means for focussing images of the segments onto a reflective electro-optical light modulator panel, whereby in operation the segment images are scrolled across the surface of the light modulator, synchronously with the application of color components of a display signal corresponding to the colors of the scrolling segment images, to produce a full color display image.
Inventors
- 👤 Philip Gleckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:26
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3111; H04N9/3117
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
132 words
A color projection system, comprising: a light source; a rotationally-symmetric element having an axis of rotation and reflective surface portions substantially perpendicular to the axis of rotation, the reflective surface portions comprising a plurality of mutually different color reflection bands capable of reflecting light from the light source as a respective plurality of mutually different color bands; the first optical circuit disposed to direct light from the source onto the reflective surface portions; a rotator disposed for rotating the rotationally-symmetric element about the axis of rotation; a display-image producing electro-optical light modulator panel; and a second optical circuit disposed to direct light reflected from the reflective surface portions onto the light modulator panel. the color projection system being operable to scroll the color bands reflected from the rotating element across the panel.
Claim 2
Dependent Claim
132 words
A color projection system, comprising: a light source; a rotationally-symmetric element having an axis of rotation and reflective surface portions substantially perpendicular to the axis of rotation, the reflective surface portions comprising a plurality of mutually different color reflection bands capable of reflecting light from the light source as a respective plurality of mutually different color bands; the first optical circuit disposed to direct light from the source onto the reflective surface portions; a rotator disposed for rotating the rotationally-symmetric element about the axis of rotation; a display-image producing electro-optical light modulator panel; and a second optical circuit disposed to direct light reflected from the reflective surface portions onto the light modulator panel. the color projection system being operable to scroll the color bands reflected from the rotating element across the panel.
Claim 3
Dependent Claim
17 words
The color projection system of claim 1 in which the reflective surface portions are curved surface portions.
Claim 4
Dependent Claim
21 words
The color projection system of claim 2 in which the curvature of the reflective portions matches that of the element surface.
Claim 5
Dependent Claim
18 words
The color projection system of claim 1 in which the reflective surface portions are cylindrically curved surface portions.
Claim 6
Dependent Claim
18 words
The color projection system of claim 1 in which the reflective portions of the surface comprise diachronic filters.
Claim 7
Dependent Claim
28 words
The color projection system of claim 5 in which the diachronic filters are formed on a support, and the support is bonded to the surface of the element.
Claim 8
Dependent Claim
16 words
The color projection system of claim 5 in which the diachronic filters have color reflection bands.
Claim 9
Dependent Claim
16 words
The color projection system of claim 5 in which the diachronic filters have color transmission bands.
Claim 10
Dependent Claim
17 words
The color projection system of claim 1 in which the first optical circuit includes a cylindrical lens.
Claim 11
Dependent Claim
21 words
The color projection system of claim 1 comprising a light integrator to integrate light from the source into a telecentric beam.
Claim 12
Dependent Claim
22 words
The color projection system of claim 1 comprising a polarization element to convert light from the source into P type polarized light.
Claim 13
Dependent Claim
22 words
The color projection system of claim 1 comprising a polarization element to convert light from the source into S type polarized light.
Claim 14
Dependent Claim
18 words
The color projection system of claim 1 in which the first optical circuit includes a telephoto lens set.
Claim 15
Dependent Claim
126 words
A color projection system, comprising: a light source; a rotationally-symmetric element having an axis of rotation and curved reflective surface portions, the reflective surface portions comprising a plurality of mutually different color reflection bands capable of reflecting light from the light source as a respective plurality of mutually different color bands; the first optical circuit disposed to direct light from the source onto the reflective surface portions; a rotator disposed for rotating the rotationally-symmetric element about the axis of rotation; a display-image producing electro-optical light modulator panel; and a second optical circuit disposed to direct light reflected from the reflective surface portions onto the light modulator panel, the color projection system being operable to scroll the color bands reflected from the rotating element across the panel.
Claim 16
Dependent Claim
126 words
A color projection system, comprising: a light source; a rotationally-symmetric element having an axis of rotation and curved reflective surface portions, the reflective surface portions comprising a plurality of mutually different color reflection bands capable of reflecting light from the light source as a respective plurality of mutually different color bands; the first optical circuit disposed to direct light from the source onto the reflective surface portions; a rotator disposed for rotating the rotationally-symmetric element about the axis of rotation; a display-image producing electro-optical light modulator panel; and a second optical circuit disposed to direct light reflected from the reflective surface portions onto the light modulator panel, the color projection system being operable to scroll the color bands reflected from the rotating element across the panel.
Claim 17
Dependent Claim
21 words
The color projection system of claim 14 in which the curvature of the reflective portions matches that of the element surface.
Claim 18
Dependent Claim
18 words
The color projection system of claim 14 in which the reflective surface portions are cylindrically curved surface portions.
Claim 19
Dependent Claim
18 words
The color projection system of claim 14 in which the reflective portions of the surface comprise diachronic filters.
Claim 20
Dependent Claim
17 words
The color projection system of claim 14 in which the first optical circuit includes a cylindrical lens.
Claim 21
Dependent Claim
21 words
The color projection system of claim 14 comprising a light integrator to integrate light from the source into a telecentric beam.
Claim 22
Dependent Claim
20 words
The color projection system of claim 14 comprising a polarization element to convert light from the source into polarized light.
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) | 2004-07-23 | 2005-01-22 | 2005-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-07-23 | 2009-01-22 | 2009-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-07-23 | 2013-01-22 | 2013-07-24 | $7700.00 | Window Closed / Lapsed |