WO1996003676B1 - Image projection system and method of using same - Google Patents
Image projection system and method of using sameInfo
- Publication number
- WO1996003676B1 WO1996003676B1 PCT/US1995/009631 US9509631W WO9603676B1 WO 1996003676 B1 WO1996003676 B1 WO 1996003676B1 US 9509631 W US9509631 W US 9509631W WO 9603676 B1 WO9603676 B1 WO 9603676B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- image
- output
- laser
- projection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Abstract
An image projection system includes a source of polarized light and a spatial light modulator, having an alignment layer, wherein the polarized light is aligned with the alignment layer to allow the light to pass without the need for polarizers. Three different colored images may be produced by three separate polarized light sources (222A, 226A, 230A) with corresponding light valve super-imposed. Light sources may either be maintained activated or may be sequenced at high input energies for short intervals to reduce average energy costs. A microlaser array (922) may be coupled with a beam shaper (936) to further increase brightness of the image. The beam shaper may include a binary phase plate to modify the shape and intensity profile of the projection light beam.
Claims
AMENDED CLAIMS
[received by the International Bureau on 13 February 1996 (13.02.96); original claims 3-6 amended; remaining claims unchanged (8 pages)] cross-sectional area substantially equal to the surface area of said entrance alignment layer; reflecting selectively said projection light with said light valve to help generate said output light indicative of the image, wherein said light valve is a digital mirror device; positioning said digital mirror device relative to said light source to permit said projection light to be reflected as said output light; emitting selectively a polarized laser beam having a distinctive color from each one of said lasers to generate a colored output light; and superimposing said colored output lights with a mirror means to produce a full color image.
3. An image producing system, comprising: light source means including at least one laser device switchable between an on state and an off state for generating pulses of coherent projection light along an input optical path, wherein said coherent projection light is generated at a maximum luminosity level when said laser device is switched to said on state; spatial light modulator means disposed in said input optical path for modulating said coherent projection light to produce output light representative of the image along an output optical path for facilitating the projection of the image onto a remote surface, wherein substantially all of said output light produced by said spatial light modulator means is projected onto said remote surface; said spatial light modulator means includes a light valve for controlling the luminosity of said output light produced by said spatial light modulator means to facilitate reproducing the image with varying shades on said remote surface; and
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wherein said light source means includes at least three laser devices, said laser devices including a red laser device, a green laser device, and a blue laser device which are each switched between their on and off states to generate sequential mono-colored pulses of coherent projection light for facilitating the reproduction of the image in full color.
4. A method of projecting an image, comprising: generating pulses of coherent projection light along an input optical path with a light source means including at least one laser device selectively switchable between an on state and an off state, wherein said coherent projection light is generated at a maximum luminosity level when said laser device is switched to said on state; modulating said coherent projection light with a spatial light modulator means disposed in said input optical path to produce output light representative of the image along an output optical path for facilitating the projection of the image onto a remote surface, wherein substantially all of said output light produced by said spatial light modulator means is projected onto said remote surface; controlling the luminosity of said output light produced by said spatial light modulator means with a light valve to facilitate reproducing the image with varying shades on said remote surface; and using a light source including at least three laser devices, said laser devices including a red laser device, a green laser device, and a blue laser device, and switching each of said laser devices between their on and off states to generate sequential mono-colored pulses of coherent projection light for facilitating the reproduction of the image in full color.
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5. A method of producing a bright image utilizing a plurality of different colored lasers, comprising: generating a plurality of different colored laser lights; controlling each one of the laser lights individually and sequentially to cause them to be energized at a substantially peak ON output luminosity for a short ON period of time, thereby providing a high average output luminosity at a low average energy cost; controlling each one of the laser lights individually and sequentially to cause them to be activated and deactivated selectively during a portion only of a frame time interval between a near ON output luminosity for a long OFF period of time and said substantially peak ON output luminosity for said short ON period of time to enable the laser lights to switch between OFF and ON in an efficient manner; forming a bright image from the laser lights; wherein the image is formed by using a deformable mirror device; and image relaying from the deformable mirror device to shorten effectively the optical path of the ON light reflected from the deformable mirror device.
6. A system for producing a bright image comprising: a plurality of lasers for generating a plurality of different colored laser lights; means for controlling each one of the lasers individually and sequentially to cause them to be energized at a substantially peak ON output luminosity for a short ON period of time, thereby providing a high average output luminosity at a low average energy cost; means for controlling each one of the lasers individually and sequentially to cause them to be activated and deactivated selectively during a portion
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only of a frame time interval between a near ON output luminosity for a long OFF period of time and said substantially peak ON output luminosity for said short ON period of time to enable the lasers to switch between OFF and ON in an efficient manner; means for forming a bright image from the laser lights; wherein said means for forming includes a deformable mirror device; and an image relaying arrangement for the deformable mirror device to shorten effectively the optical path of the ON light reflected from the deformable mirror device.
7. An image projection system, comprising: a spatial light modulator means for generating an image to be projected onto a remote viewing surface; a beam shaping means for directing uniformly distributed high intensity light onto said modulator means in registration therewith for illumination purposes; and said beam shaping means including means for sampling coherent light to and from a group of diverging light beams to expand onto an overlapping pattern and for imaging the pattern onto said modulator means; and laser means for generating high intensity coherent light.
8. A system according to claim 7, wherein said beam shaping means including a beam sampling microlens array for sampling non-uniform intensity coherent light from said laser means to produce a group of diverging, said first array including a plurality of microlenses, each having a generally rectangular configuration generally similar to the configuration of said modulator means to cause the diverging light beams to each have a rectangular cross section proportional to the shape of said modulator means.
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9. A system according to claim 9, wherein said beam shaping means includes a field lens for helping focus light emitted from said imaging microlens array onto said modulator means.
10. An image projection system according to claim 7, wherein said laser means is light source means including at least one laser device switchable between an on state and an off state for generating pulses of coherent projection light along an input optical path, wherein said coherent projection light is generated at a maximum luminosity level when said laser device is switched to said on state; wherein said spatial light modulator means is disposed in said input optical path for modulating said coherent projection light to produce output light representative of the image along an output optical path for facilitating the projection of the image onto a remote surface, wherein substantially all of said output light produced by said spatial light modulator means is projected onto said remote surface; and said spatial light modulator means includes a light valve for controlling the luminosity of said output light produced by said spatial light modulator means to facilitate reproducing the image with varying shades on said remote surface.
11. An image projection system according to claim
10, wherein said light valve is reflective.
12. An image projection system according to claim
11, wherein said light valve is beam addressed.
13. An image projection system according to claim
12, wherein said light valve is a photoelectric liquid crystal device.
14. An image projection system according to claim 11, wherein said spatial light modulator means further includes a mirror device for reflecting modulated
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projection light to direct it onto said output optical path as said output light.
15. An image projection system according to claim 14, wherein said light valve is a ferroelectric liquid crystal display device.
16. An image projection system according to claim 10, further including an optical lens for facilitating the coordination of a cross-sectional area of said coherent projection light with a frontal surface area of said light valve to enable substantially all of said coherent projection light to impinge said frontal surface area.
17. A method of projecting an image, comprising: generating pulses of coherent projection light along an input optical path with a light source means including at least one laser device selectively switchable between an on state and an off state, wherein said coherent projection light is generated at a maximum luminosity level when said laser device is switched to said on state; modulating said coherent projection light with a spatial light modulator means disposed in said input optical path to produce output light representative of the image along an output optical path for facilitating the projection of the image onto a remote surface, wherein substantially all of said output light produced by said spatial light modulator means is projected onto said remote surface; controlling the luminosity of said output light produced by said spatial light modulator means with a light valve to facilitate reproducing the image with varying shades on said remote surface; sampling coherent light to form a group of diverging light beams to expand into an overlapping
pattern; and imaging the pattern onto said modulator means.
18. A method of producing a bright image utilizing a plurality of different colored lasers, comprising: generating a plurality of different colored laser lights; controlling each one of the laser lights individually and sequentially to cause them to be energized at a substantially peak ON output luminosity for a short ON period of time, thereby providing a high average output luminosity at a low average energy cost; controlling each one of the laser lights individually and sequentially to cause them to be deactivated at a near ON output luminosity for a short OFF period of time to enable the laser lights to switch between OFF and ON in an efficient manner; forming a bright image from the laser lights; sampling coherent light to form a group of diverging light beams to expand into an overlapping pattern; and imaging the pattern onto said modulator means.
19. A method according to claim 18, further including projecting the bright image.
20. A method according to claim 18, wherein the image is formed by using a deformable mirror device.
21. A method according to claim 20, further including image relaying from the deformable mirror device to shorten effectively the optical path of the ON light reflected from the deformable mirror device.
22. A system for producing a bright image comprising: a plurality of lasers for generating a plurality of different colored laser lights; means for controlling each one of the lasers individually and sequentially to cause them to be
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energized at a substantially peak ON output luminosity for a short ON period of time, thereby providing a high average output luminosity at a low average energy cost; means for controlling each on of the lasers individually and sequentially to cause them to be deactivated at a near ON output luminosity for a short OFF period of time to enable the lasers to switch between OFF and ON in an efficient manner; means for forming a bright image from the laser lights; means for sampling the laser light to form a group of diverging light beams to expand into an overlapping pattern and for imaging the pattern onto said means for forming a bright image.
23. A system according to claim 22, further including means for projecting the bright image.
24. A system according to claim 22, wherein said means for forming includes a deformable mirror device.
25. A system according to claim 24, further including an image relaying arrangement for the deformable mirror device to shorten effectively the optical path of the ON light reflected from the deformable mirror device.
26. A system according to claim 22, further including an emersed eggcrate dichroic mirror assembly to combine the laser lights.
27. A system according to claim 22, wherein said plurality of lasers preferably is a multiplicity of microlaser elements.
28. An image projecting system according to claim 7, wherein said beam shaping means includes a binary phase plate.
29. An image projecting system according to claim 7, wherein said beam shaping means includes a holographic diffuser.
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STATEMENT UNDER ARTICLE 19
In response to the International Search Report mailed 27 December 1995, each one of the cited references has been reviewed, and the comments regarding the claims have been considered.
The International Search Report indicated that claims 3 to 4 could not be considered novel or could not be considered to involve an inventive step in view of U.S. patent 4,060,316. Similarly, the Report indicated that claims 5 to 6 could not be considered novel or could not be considered to involve an inventive step in view of U.S. patent 5,192,946.
The Applicant amended claims 3 to 6 to agree identically with corresponding claims from U.S. patent application Serial No. 08/292,619, which are believed to be allowable.
Attorney for Applicant has carefully reviewed each one of the cited references made of record and not relied upon, and believes that the claims presently on file in the subject application patentably distinguish thereover, either taken alone or in combination with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU32063/95A AU3206395A (en) | 1994-07-25 | 1995-07-25 | Image projection system and method of using same |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/279,943 US5517263A (en) | 1994-07-25 | 1994-07-25 | Image projection system and method of using same |
| US08/279,943 | 1994-07-25 | ||
| US08/292,619 | 1994-08-18 | ||
| US08/292,619 US5700076A (en) | 1994-07-25 | 1994-08-18 | Laser illuminated image producing system and method of using same |
| US08/506,097 | 1995-07-24 | ||
| US08/506,097 US5704700A (en) | 1994-07-25 | 1995-07-24 | Laser illuminated image projection system and method of using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1996003676A1 WO1996003676A1 (en) | 1996-02-08 |
| WO1996003676B1 true WO1996003676B1 (en) | 1996-03-14 |
Family
ID=27403110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1995/009631 Ceased WO1996003676A1 (en) | 1994-07-25 | 1995-07-25 | Image projection system and method of using same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5704700A (en) |
| AU (1) | AU3206395A (en) |
| WO (1) | WO1996003676A1 (en) |
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- 1995-07-24 US US08/506,097 patent/US5704700A/en not_active Expired - Lifetime
- 1995-07-25 AU AU32063/95A patent/AU3206395A/en not_active Abandoned
- 1995-07-25 WO PCT/US1995/009631 patent/WO1996003676A1/en not_active Ceased
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