Display apparatus using LCD Panel
View Patent ↗A projection apparatus ( 10 ) has an illumination section with a light source ( 20 ) providing a substantially unpolarized illumination beam of multiple wavelengths. A multiple wavelength polarizer polarizes the substantially unpolarized illumination beam to provide a substantially polarized illumination beam of multiple wavelengths. A uniformizer conditions the substantially polarized illumination beam of multiple wavelengths to provide a uniformized polarized beam of multiple wavelengths. A color scrolling element provides a repeating, scrolled sequence of colors from a set of colors, thereby providing first, second, and third component wavelength illumination. A component wavelength modulating section accepts the sequence of first, second, and third component wavelength illumination from the color scrolling element and sequentially modulates the first, second, and third component wavelength illumination at a transmissive liquid crystal modulator panel ( 118 ) to provide a modulated component wavelength beam to a lens for projection toward a display surface ( 40 ).
1. A projection apparatus comprising:
a) an illumination section comprising:
i) a light source providing a substantially unpolarized illumination beam of multiple wavelengths;
ii) a multiple wavelength polarizer for polarizing and splitting the substantially unpolarized illumination beam to provide a first and second substantially polarized illumination beams of multiple wavelengths;
iii) a first and second uniformizer for conditioning the substantially polarized illumination beam of multiple wavelengths to provide a first and second uniformized polarized beam of multiple wavelengths;
iv) a first color scrolling element for providing a first repeating, scrolled sequence of colors from a first set of colors, thereby providing a first component wavelength illumination, a second component wavelength illumination, and a third component wavelength illumination from the first multiple wavelength beam;
v) a second color scrolling element for providing a second repeating, scrolled sequence of colors from a second set of colors, thereby providing a fourth component wavelength illumination, a fifth component wavelength illumination, and a sixth component wavelength illumination from the second multiple wavelength beam;
b) a first component wavelength modulator for accepting the sequence of first, second, and third component wavelength illumination from the first color scrolling element and sequentially modulating the first, second, and third component wavelength illumination to provide a first modulated component wavelength beam to a first lens for projection toward a display surface; and
c) a second component wavelength modulator for accepting the sequence of fourth, fifth, and sixth component wavelength illumination from the second color scrolling element and sequentially modulating the fourth, fifth, and sixth component wavelength illumination to provide a second modulated component wavelength beam to a second lens for projection toward the display surface.
2. The projection apparatus of claim 1 wherein the first set of colors is red, green, and blue.
3. The projection apparatus of claim 1 wherein the second set of colors is cyan, magenta, and yellow.
4. The projection apparatus of claim 1 wherein paired complementary colors are projected at substantially the same time.
5. The projection apparatus of claim 1 wherein the first component wavelength modulating section comprises a first illumination path Fresnel lens for focusing first, second, and third component wavelength illumination from the first scrolling element toward the first portion of the transmissive liquid crystal modulator panel.
6. The projection apparatus of claim 5 wherein the first component wavelength modulating section further comprises a modulated beam Fresnel lens for directing a component wavelength beam from the transmissive liquid crystal modulator panel toward a projection lens.
7. The projection apparatus of claim 6 wherein the modulated beam Fresnel lens comprises crossed cylindrical Fresnel lenses.
8. The projection apparatus of claim 1 wherein the first color scrolling element comprises a color filter wheel.
9. The projection apparatus of claim 5 wherein the first illumination path Fresnel lens is a glass Fresnel lens.
10. The projection apparatus of claim 6 wherein the modulated beam Fresnel lens is a glass Fresnel lens.
11. A projection apparatus according to claim 1 wherein the light source is taken from the group consisting of an LED, an LED array, a Xenon lamp, and a Mercury lamp.
12. A projection apparatus according to claim 1 wherein the uniformizer comprises a lenslet array.
13. A projection apparatus according to claim 1 wherein the uniformizer comprises an integrating bar.
14. A projection apparatus according to claim 1 wherein the transmissive liquid crystal modulator comprises thin film transistors.
15. A projection apparatus according to claim 1 wherein at least one component wavelength polarizer is spaced apart from the monochrome transmissive liquid crystal modulator panel.
16. A projection apparatus according to claim 1 wherein the multiple wavelength polarizer is a wire grid polarizer.
17. A projection apparatus according to claim 16 wherein the wire surface side of the wire grid polarizer device is oriented toward the liquid crystal modulator panel.
18. A projection apparatus comprising:
a) an illumination section comprising:
i) a light source providing a substantially unpolarized illumination beam of multiple wavelengths;
ii) a multiple wavelength polarizer for polarizing the substantially unpolarized illumination beam to provide a substantially polarized illumination beam of multiple wavelengths;
iii) a uniformizer for conditioning the substantially polarized illumination beam of multiple wavelengths to provide a uniformized polarized beam of multiple wavelengths;
iv) a first color scrolling element for providing a first repeating, scrolled sequence of colors from a first set of colors, thereby providing a first component wavelength illumination, a second component wavelength illumination, and a third component wavelength illumination;
v) a second color scrolling element for providing a second repeating, scrolled sequence of colors from a second set of colors, thereby providing a fourth component wavelength illumination, a fifth component wavelength illumination, and a sixth component wavelength illumination;
b) a first component wavelength modulating section for accepting the sequence of first, second, and third component wavelength illumination from the first color scrolling element and sequentially modulating the first, second, and third component wavelength illumination at a first transmissive liquid crystal modulator panel to provide a first modulated component wavelength beam to a first lens for projection toward a display surface; and
c) a second component wavelength modulating section for accepting the sequence of fourth, fifth, and sixth component wavelength illumination from the second color scrolling element and sequentially modulating the fourth, fifth, and sixth component wavelength illumination at a second transmissive liquid crystal modulator panel to provide a second modulated component wavelength beam to a second lens for projection toward the display surface.
19. The projection apparatus of claim 18 wherein the first set of colors is red, green, and blue.
20. The projection apparatus of claim 18 wherein the second set of colors is cyan, magenta, and yellow.
21. The projection apparatus of claim 18 wherein blue and yellow colors are projected at substantially the same time.
22. The projection apparatus of claim 18 wherein the first component wavelength modulating section comprises a first illumination path Fresnel lens for focusing first, second, and third component wavelength illumination from the first scrolling element toward the first portion of the transmissive liquid crystal modulator panel.
23. The projection apparatus of claim 22 wherein the first component wavelength modulating section further comprises a modulated beam Fresnel lens for directing a component wavelength beam from the transmissive liquid crystal modulator panel toward a projection lens.
24. The projection apparatus of claim 23 wherein the modulated beam Fresnel lens comprises crossed cylindrical Fresnel lenses.
25. The projection apparatus of claim 18 wherein the first color scrolling element comprises a color filter wheel.
26. The projection apparatus of claim 22 wherein the first illumination path Fresnel lens is a glass Fresnel.