Image projector and image projector control method
US-2015334361-A1 · Nov 19, 2015 · US
Light source device, and image projection apparatus employing light source device
US9544554B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9544554-B2 |
| Application number | US-201414504585-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 2, 2014 |
| Priority date | Oct 23, 2013 |
| Publication date | Jan 10, 2017 |
| Grant date | Jan 10, 2017 |
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Abstract
Official abstract text for this publication.
A light source device includes a first light source to emit first light having a first wavelength range; a wavelength convertor, disposed on an optical path of the first light, to receive the first light to emit light having other wavelength range different from the first wavelength range; a cyclical movement unit to cyclically move the wavelength convertor while crossing the optical path of the first light; optical parts to define an optical path of the first light, and an optical path of the light emitted from the wavelength convertor; a detector to detect a cyclic movement condition of the cyclical movement unit; and a received light quantity reducing unit to reduce light quantity of the first light received by the wavelength convertor when a cyclic movement condition detected by the detector satisfies an abnormal condition while outputting the first light or the light having other wavelength range to outside.
First claim
Opening claim text (preview).
What is claimed is: 1. A light source device, comprising: a first light source configured to emit first light having a first wavelength range; a wavelength convertor, disposed on an optical path of the first light emitted from the first light source, configured to receive the first light having the first wavelength range from the first light source to emit light having other wavelength range different from the first wavelength range of the first light; a cyclical movement unit…
Assignees
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Classifications
- H04N9/3114Primary
Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9544554B2 cover?
- A light source device includes a first light source to emit first light having a first wavelength range; a wavelength convertor, disposed on an optical path of the first light, to receive the first light to emit light having other wavelength range different from the first wavelength range; a cyclical movement unit to cyclically move the wavelength convertor while crossing the optical path of th…
- Who is the assignee on this patent?
- Murai Toshiharu, Ricoh Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H04N9/3114. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 10 2017 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).