US6231190B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color correction filter for displays
Assignee: Texas Instruments Inc
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Filing: 1999-06-22
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Granted: 2001-05-15
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Expires: 2019-06-22
Abstract
Abstract A method of and system for improving the saturation of the primary colors in a display system. A color correction filter ( 218 ) removes unwanted wavelengths from a beam of light. A color splitter ( 228 ) separates the beam of light into at least three primary color beams of light. The primary color beams of light are selectively modulated by spatial light modulators ( 220, 222, 224 ) before passing through a projection lens ( 104 ) which focuses the beams of light onto an image plane.
Inventors
- 👤 D. Scott Dewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:01
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/14; G02B27/145; G02B27/149; G02B5/00; G02B5/20; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
120 words
A display system comprising: a light source for providing a beam of light along a white light path; a color splitter on said white light path for separating said beam of light into at least three primary color light beams, each of said at least three primary color light beams comprised of light in a band of wavelengths and traveling along a separate light path; three light modulators, each of said three light modulators disposed on one of said separate light paths for said three primary color light beams; and at least one color correction filter on said white light path, said color correction filter for removing a portion of light having a wavelength between said three bands of wavelengths.
Claim 2
Dependent Claim
120 words
A display system comprising: a light source for providing a beam of light along a white light path; a color splitter on said white light path for separating said beam of light into at least three primary color light beams, each of said at least three primary color light beams comprised of light in a band of wavelengths and traveling along a separate light path; three light modulators, each of said three light modulators disposed on one of said separate light paths for said three primary color light beams; and at least one color correction filter on said white light path, said color correction filter for removing a portion of light having a wavelength between said three bands of wavelengths.
Claim 3
Dependent Claim
17 words
The display system of claim 1 , wherein said color splitter is a color splitting prism assembly.
Claim 4
Dependent Claim
17 words
The display system of claim 1 , wherein said color splitter is a series of dichroic mirrors.
Claim 5
Dependent Claim
23 words
The display system of claim 1 , wherein said color splitter separates incident light into red, green, and blue primary color light beams.
Claim 6
Dependent Claim
20 words
The display system of claim 1 , wherein said at least one color correction filter blocks yellow and blue-green light.
Claim 7
Dependent Claim
24 words
The display system of claim 1 , wherein said at least one color correction filter is angle-tuned to reduce the effect of manufacturing tolerances.
Claim 8
Dependent Claim
25 words
The display system of claim 1 , wherein said at least one color correction filter is angle-tuned to alter the pass-band characteristics of the filter.
Claim 9
Independent Claim
98 words
A method of creating an image, said method comprising: providing a beam of light; separating said beam of light into at least three primary color light beams each comprised of light in a band of wavelengths and traveling along a separate light path; filtering said beam of light to remove portions of said beam having wavelengths between said bands of wavelengths comprising said at least three primary color light beams; selectively modulating each of said at least three primary color light beams; and focusing said at least three selectively modulated primary color light beams onto an image plane.
Claim 10
Independent Claim
98 words
A method of creating an image, said method comprising: providing a beam of light; separating said beam of light into at least three primary color light beams each comprised of light in a band of wavelengths and traveling along a separate light path; filtering said beam of light to remove portions of said beam having wavelengths between said bands of wavelengths comprising said at least three primary color light beams; selectively modulating each of said at least three primary color light beams; and focusing said at least three selectively modulated primary color light beams onto an image plane.
Claim 11
Dependent Claim
23 words
The method of claim 1 , said separating step further comprising using a color splitting prism assembly to separate said beam of light.
Claim 12
Dependent Claim
23 words
The method of claim 8 , said separating step further comprising using a series of dichroic mirrors to separate said beam of light.
Claim 13
Dependent Claim
27 words
The method of claim 8 , said separating step comprising the step of separating said beam of light into red, green, and blue primary color light beams.
Claim 14
Dependent Claim
25 words
The method of claim 8 , said filtering step comprising removing at least some of the yellow and blue-green light from said beam of light.
Claim 15
Dependent Claim
135 words
A display system comprising: a light source for providing a beam of light along a white light path; a color splitter on said white light path for separating said beam of light into at least three primary color light beams, each of said at least three primary color light beams comprised of light in a band of wavelengths and traveling along a separate light path; three light modulators, each of said three light modulators disposed on one of said separate light paths for said three primary color light beams; and at least one color correction filter on said white light path, said color correction filter for removing a portion of light having a wavelength between said three bands of wavelengths, said at least one color correction filter angle-tuned to reduce the effect of manufacturing tolerances.
Claim 16
Dependent Claim
135 words
A display system comprising: a light source for providing a beam of light along a white light path; a color splitter on said white light path for separating said beam of light into at least three primary color light beams, each of said at least three primary color light beams comprised of light in a band of wavelengths and traveling along a separate light path; three light modulators, each of said three light modulators disposed on one of said separate light paths for said three primary color light beams; and at least one color correction filter on said white light path, said color correction filter for removing a portion of light having a wavelength between said three bands of wavelengths, said at least one color correction filter angle-tuned to reduce the effect of manufacturing tolerances.
Claim 17
Dependent Claim
17 words
The display system of claim 13 , wherein said color splitter is a color splitting prism assembly.
Claim 18
Dependent Claim
17 words
The display system of claim 13 , wherein said color splitter is a series of dichroic mirrors.
Claim 19
Dependent Claim
23 words
The display system of claim 13 , wherein said color splitter separates incident light into red, green, and blue primary color light beams.
Claim 20
Dependent Claim
20 words
The display system of claim 13 , wherein said at least one color correction filter blocks yellow and blue-green light.
Claim 21
Dependent Claim
136 words
A display system comprising: a light source for providing a beam of light along a white light path; a color splitter on said white light path for separating said beam of light into at least three primary color light beams, each of said at least three primary color light beams comprised of light in a band of wavelengths and traveling along a separate light path; three light modulators, each of said three light modulators disposed on one of said separate light paths for said three primary color light beams; and at least one color correction filter on said white light path, said color correction filter for removing a portion of light having a wavelength between said three bands of wavelengths, said at least one color correction filter angle-tuned to alter the pass-band characteristics of the filter.
Claim 22
Dependent Claim
136 words
A display system comprising: a light source for providing a beam of light along a white light path; a color splitter on said white light path for separating said beam of light into at least three primary color light beams, each of said at least three primary color light beams comprised of light in a band of wavelengths and traveling along a separate light path; three light modulators, each of said three light modulators disposed on one of said separate light paths for said three primary color light beams; and at least one color correction filter on said white light path, said color correction filter for removing a portion of light having a wavelength between said three bands of wavelengths, said at least one color correction filter angle-tuned to alter the pass-band characteristics of the filter.
Claim 23
Dependent Claim
17 words
The display system of claim 18 , wherein said color splitter is a color splitting prism assembly.
Claim 24
Dependent Claim
17 words
The display system of claim 18 , wherein said color splitter is a series of dichroic mirrors.
Claim 25
Dependent Claim
23 words
The display system of claim 18 , wherein said color splitter separates incident light into red, green, and blue primary color light beams.
Claim 26
Dependent Claim
20 words
The display system of claim 18 , wherein said at least one color correction filter blocks yellow and blue-green 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) | 2004-05-14 | 2004-11-13 | 2005-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-14 | 2008-11-13 | 2009-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-14 | 2012-11-13 | 2013-05-15 | $7700.00 | Window Closed / Lapsed |