Speckle jitter sensor
US-9195071-B2 · Nov 24, 2015 · US
Projection device and projection-type video display device
US9217879B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9217879-B2 |
| Application number | US-201414568204-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 12, 2014 |
| Priority date | Sep 8, 2010 |
| Publication date | Dec 22, 2015 |
| Grant date | Dec 22, 2015 |
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Abstract
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Provided are a projection device and a projection-type video display device capable of displaying a plurality of videos, allowing speckles to be inconspicuous, and miniaturizing an optical system. A projection device includes an optical element including light diffusion elements capable of diffusing light, an irradiation device configured to irradiate the optical element with illumination light beams, each illumination light beam scanning the corresponding light diffusion element, spatial light modulators, each spatial light modulator being illuminated with illumination light beam which is incident from the irradiation device to each light diffusion element to be diffused, and projection optical systems, each projection optical system projecting modulation image obtained on each spatial light modulator on corresponding screen. The illumination light beam, which is incident to each position of each light diffusion element to be diffused, overlappedly illuminates on corresponding spatial light modulator.
First claim
Opening claim text (preview).
The invention claimed is: 1. An illumination device illuminating a plurality of illuminated regions, comprising: an optical element comprising a plurality of light diffusion elements capable of diffusing light; and an irradiation device configured to irradiate the optical element with a plurality of illumination light beams, each illumination light beam scanning the corresponding light diffusion element, wherein the illumination light beam, which is incident to each position o…
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Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
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- What does patent US9217879B2 cover?
- Provided are a projection device and a projection-type video display device capable of displaying a plurality of videos, allowing speckles to be inconspicuous, and miniaturizing an optical system. A projection device includes an optical element including light diffusion elements capable of diffusing light, an irradiation device configured to irradiate the optical element with illumination light…
- Who is the assignee on this patent?
- Dainippon Printing Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B27/48. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 22 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).