Industry Patents
Patent: 6882374
Image Projection System
(Click image for PDF of full patent)
| Patent Number: |
6882374 |
| Title: |
Image Projection System |
| Abstract: |
A DMD (4) as a image display device time divisionally displays channel
images formed by separating an image into RGB channels. A white light
emitted from a xenon lamp (1) is separated, by an acousto-optical element
(3), into spectal components. Those spectal components are projected onto
the DMD (4). A refractive index of the acousto-optical element (3) varies
with a frequency of an ultrasonic wave applied thereto. Therefore, a color
of the spectral component applied to the DMD (4) may be changed by varying
the refractive index of the acousto-optical element. RGB monochromatic
lights may be irradiated on the DMD (4) by setting the frequencies
F.sub.R, F.sub.G, F.sub.B of the ultrasonic wave at appropriate values.
|
| Country of Issue: |
US |
| First Named Inventor: |
Kensuke Numakoshi |
| Assignee: |
Yamaha |
| Continuation or Divisional of: |
|
| International Classification: |
H04N 5/74 |
| US Classification: |
348/769 |
| Issue Date: |
04-19-2005 |
| Filing Date: |
05-07-2002 |
| Application : |
10/140564 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
6882374 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6882374 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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