METHOD AND APPARATUS FOR INCREASING COLOR GAMUT OF A DISPLAY
First Claim
Patent Images
1. A color projection system comprising:
- (a) a first light source for providing a first color beam;
(b) a first spatial light modulator for modulating said first color beam to provide a first modulated color beam on a first optical axis;
(c) a second light source for providing a second color beam;
(d) a second spatial light modulator for modulating said second color beam to provide a second modulated color beam on a second optical axis;
(e) a third light source for providing a third color beam for transmission through a first color combiner;
(f) a third spatial light modulator for modulating said third color beam to provide a third modulated color beam;
(g) a fourth light source for providing a fourth color beam for reflection by said first color combiner;
(h) a fourth spatial light modulator for modulating said fourth color beam to provide a fourth modulated color beam;
(i) a polarizing beamsplitter for combining said third and fourth modulated color beams onto a third optical axis;
(j) a second color combiner for combining the light on said first, second, and third optical axes to form a multicolor modulated beam; and
(k) a projection system for projecting said multicolor modulated beam.
17 Assignments
0 Petitions
Accused Products
Abstract
A method and projection system (10) for increasing the color gamut of images projected onto a display surface (140) by using four or more light sources (12), where the light sources (12) are selected for high brightness and narrow wavelength characteristics and are selected from optimal wavelengths for color gamut expansion. Light sources (12) for large-scale projection environments are preferably lasers. Smaller systems may employ LEDs or other relatively saturated, relatively bright light sources (12).
-
Citations
46 Claims
-
1. A color projection system comprising:
-
(a) a first light source for providing a first color beam;
(b) a first spatial light modulator for modulating said first color beam to provide a first modulated color beam on a first optical axis;
(c) a second light source for providing a second color beam;
(d) a second spatial light modulator for modulating said second color beam to provide a second modulated color beam on a second optical axis;
(e) a third light source for providing a third color beam for transmission through a first color combiner;
(f) a third spatial light modulator for modulating said third color beam to provide a third modulated color beam;
(g) a fourth light source for providing a fourth color beam for reflection by said first color combiner;
(h) a fourth spatial light modulator for modulating said fourth color beam to provide a fourth modulated color beam;
(i) a polarizing beamsplitter for combining said third and fourth modulated color beams onto a third optical axis;
(j) a second color combiner for combining the light on said first, second, and third optical axes to form a multicolor modulated beam; and
(k) a projection system for projecting said multicolor modulated beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A color projection system comp rising:
-
(a) a first light source f or providing a first color beam;
(b) a second light source for providing a second color beam;
(c) a third light source for providing a third color beam;
(d) a fourth light source for providing a fourth color beam;
(e) a color combiner for combining said first, second, third, and fourth color beams onto a common axis to form an illumination beam;
(f) a spatial light modulator for modulating said illumination beam to provide a modulated color beam; and
(g) a projection system for projecting said modulated color beam. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A color projection system comprising:
-
(a) a first light source for providing a first color beam and a first modulator for modulating said first color beam to form a first modulated beam;
(b) a second light source for providing a second color beam and a second modulator for modulating said second color beam to form a second modulated beam;
(c) a third light source for providing a third color beam and a third modulator for modulating said third color beam to form a third modulated beam;
(d) a fourth light source for providing a fourth color beam and a fourth modulator for modulating said fourth color beam to form a fourth modulated beam;
(e) a color combiner for combining said first, second, third, and fourth modulated beams onto a common axis to form an illumination beam; and
(f) a spinning polygon mirror for directing said illumination beam toward a projection system for projecting said modulated color beam toward a display surface. - View Dependent Claims (26, 27, 28, 29, 30)
-
-
31. A color projection system comprising:
-
(a) a first light source for providing a first color beam;
(b) a first spatial light modulator for modulating said first color beam to provide a first modulated color beam on a first optical axis;
(c) a second light source for providing a second color beam;
(d) a second spatial light modulator for modulating said second color beam to provide a second modulated color beam on a second optical axis;
(e) a third light source for providing a third color beam;
(f) a third spatial light modulator for modulating said third color beam to provide a third modulated color beam;
(g) a fourth light source for providing a fourth color beam;
(h) a fourth spatial light modulator for modulating said fourth color beam to provide a fourth modulated color beam;
(i) a first color combiner for combining said third and fourth modulated color beams onto a third optical axis;
(j) a second color combiner for combining the light on said first, second, and third optical axes to form a multicolor modulated beam; and
(k) a projection system for projecting said multicolor modulated beam toward a display surface. - View Dependent Claims (32, 33, 34, 35, 36)
-
-
37. A color projection system comprising:
-
(a) a first light source for providing a first color beam;
(b) a first spatial light modulator for modulating said first color beam to provide a first modulated color beam on a first optical axis;
(c) a second light source for providing a second color beam;
(d) a second spatial light modulator for modulating said second color beam to provide a second modulated color beam on a second optical axis;
(e) a third light source for providing a green color beam for transmission through a first color combiner, said green color beam having p-polarity with respect to a second color combiner;
(f) a third spatial light modulator for modulating said green color beam to provide a green modulated color beam;
(g) a fourth light source for providing a blue-green color beam for reflection by said first color combiner, said blue-green color beam having s-polarity with respect to said second color combiner;
(h) a fourth spatial light modulator for modulating said blue-green color beam to provide a blue-green modulated color beam;
(i) a polarizing beamsplitter for combining said green and said blue-green modulated color beams onto a third optical axis;
(j) said second color combiner combining the light on said first, second, and third optical axes to form a multicolor modulated beam; and
(k) a projection system for projecting said multicolor modulated beam.
-
-
38. A method for projecting a color image, comprising:
-
(a) providing a first color beam from a first light source;
(b) providing a second color beam from a second light source;
(c) providing a third color beam from a third light source;
(d) providing a fourth color beam from a fourth light source;
(e) directing said first, second, third, and fourth color beams onto a common axis to form an illumination beam;
(f) modulating said illumination beam at a spatial light modulator to provide a modulated beam; and
(g) projecting said modulated beam toward a display surface. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
-
-
46. A method for projecting a color image, comprising:
-
(a) providing a first color beam from a first light source;
(b) providing a second color beam from a second light source;
(c) providing a green color beam from a green light source, said green color beam having p-polarity with respect to a color combiner;
(d) providing a blue-green color beam from a blue-green light source, said blue-green color beam having s-polarity with respect to said color combiner;
(e) directing said first, second, third, and fourth color beams onto a common axis to form an illumination beam;
(f) modulating said illumination beam at a spatial light modulator to provide a modulated beam; and
(g) projecting said modulated beam toward a display surface.
-
Specification