Two-piece LCD projection device with light filter function and projection method thereof
US-12140854-B1 · Nov 12, 2024 · US
Illumination device, projecting device and lighting device
US9075293B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9075293-B2 |
| Application number | US-201213693803-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2012 |
| Priority date | Dec 4, 2011 |
| Publication date | Jul 7, 2015 |
| Grant date | Jul 7, 2015 |
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- Title
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Abstract
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An illumination device includes a wavelength conversion material layer with a first surface, which includes a wavelength conversion material and a scattering material; a light guide device located adjacent the wavelength conversion material layer on a side facing its first surface for directing an excitation light onto the first surface of the wavelength conversion material layer, and for directing a mixed light emitted from the first surface, which includes converted light and remaining excitation light not absorbed by the wavelength conversion material layer, into a light exit port. In this illumination device, the light guide device can collect the excitation light reflected by the wavelength conversion material layer effectively, which insures that adding scattering materials into the wavelength conversion material layer doesn't have a significant impact on the luminous efficiency of the illumination device, and resolves the conflict between color uniformity and luminous efficiency of the device.
First claim
Opening claim text (preview).
What is claimed is: 1. An illumination device comprising: an excitation light source for generating an excitation light; a wavelength conversion material layer with a first surface, the wavelength conversion material layer containing a wavelength conversion material and a scattering material, the wavelength conversion material absorbing a portion of the excitation light and emitting a converted light with a wavelength spectrum different from that of the excitation light, the sca…
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Physics · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Physics · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9075293B2 cover?
- An illumination device includes a wavelength conversion material layer with a first surface, which includes a wavelength conversion material and a scattering material; a light guide device located adjacent the wavelength conversion material layer on a side facing its first surface for directing an excitation light onto the first surface of the wavelength conversion material layer, and for direc…
- Who is the assignee on this patent?
- Appotronics Corp Ltd
- What technology area does this patent fall under?
- Primary CPC classification G03B21/14. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 07 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).