Laser projection display system
First Claim
Patent Images
1. A display apparatus, comprising:
- a) a laser light source for emitting a light beam having a coherence length;
b) a beam expander for expanding the light beam;
c) a spatial light modulator;
d) beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator, the beam shaping optics including a fly'"'"'s eye integrator having an array of lenslets;
e) a diffuser located in the light beam between the laser light source and the beam shaping optics;
f) an electrically controllable de-speckling modulator for modifying the temporal and spatial phase of the light beam; and
g) a projection lens for producing an image of the spatial light modulator on a distant screen.
18 Assignments
0 Petitions
Accused Products
Abstract
A display apparatus includes a laser light source for emitting a light beam having a coherence length; a beam expander for expanding the light beam; a spatial light modulator; beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator, the beam shaping optics including a fly'"'"'s eye integrator having an array of lenslets; a diffuser located in the light beam between the laser light source and the beam shaping optics; an electrically controllable de-speckling modulator for modifying the temporal and spatial phase of the light beam; and a projection lens for producing an image of the spatial light modulator on a distant screen.
-
Citations
44 Claims
-
1. A display apparatus, comprising:
-
a) a laser light source for emitting a light beam having a coherence length;
b) a beam expander for expanding the light beam;
c) a spatial light modulator;
d) beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator, the beam shaping optics including a fly'"'"'s eye integrator having an array of lenslets;
e) a diffuser located in the light beam between the laser light source and the beam shaping optics;
f) an electrically controllable de-speckling modulator for modifying the temporal and spatial phase of the light beam; and
g) a projection lens for producing an image of the spatial light modulator on a distant screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. Display apparatus, comprising:
-
a) a laser light source for emitting a light beam;
b) a beam expander for expanding the light beam;
c) a linear spatial light modulator;
d) beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator, the beam shaping optics including a fly'"'"'s eye integrator having an array of lenslets;
e) an electrically controllable de-speckling modulator for modifying the temporal and spatial phase of the light beam; and
f) a projection lens and a scanning means for producing a two dimensional image on a distant screen. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. Display apparatus, comprising:
-
a) a laser light source for emitting a light beam;
b) a beam expander for expanding the light beam;
c) a spatial light modulator;
d) beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator, the beam shaping optics including a beam homogenizer to provide uniform illumination of the spatial light modulator;
e) a diffuser located in the light beam between the laser light source and the beam shaping optics;
f) an electrically controllable de-speckling modulator to modify the temporal and spatial phase of the light beam; and
g) a projection lens for producing an image of the spatial light modulator on a distant screen. - View Dependent Claims (33, 34, 35, 36)
-
-
37. A method of displaying an image, comprising the steps of:
-
a) providing a laser projector having;
i) a laser light source for emitting a light beam;
ii) a beam expander for expanding the light beam;
iii) a spatial light modulator;
iv) beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator; and
v) a diffuser located in the light beam between the laser light source and the beam shaping optics;
b) locating an electrically controllable de-speckling modulator in the light beam; and
c) projecting an image on a screen with the laser projector, while operating the de-speckling modulator to modify the temporal and spatial phase of the light beam, thereby reducing the visibility of speckle in the projected image. - View Dependent Claims (38, 39, 40, 41, 42, 43)
-
-
44. A method of displaying an image, comprising the steps of:
-
a) providing a laser projector having;
i) a laser light source for emitting a light beam;
ii) a beam expander for expanding the light beam;
iii) a spatial light modulator; and
iv) beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator;
b) locating an electrically controllable de-speckling modulator in the light beam; and
c) projecting an image on a screen with the laser projector, while operating the de-speckling modulator to modify the temporal and spatial phase of the light beam, thereby reducing the visibility of speckle in the projected image.
-
Specification