Image projection apparatus
US-2015350630-A1 · Dec 3, 2015 · US
Lighting device and projection-type display device using same
US8955985B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8955985-B2 |
| Application number | US-201013878500-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 19, 2010 |
| Priority date | Oct 19, 2010 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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Abstract
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A lighting device includes excitation light sources, phosphor wheel that emits green fluorescent light, a collimator lens that converts the emitted fluorescent light into parallel luminous flux, a red laser, a blue laser, a dichroic mirror that combines the excitation light supplied from the excitation light sources and the light supplied from the red laser, and a cross dichroic prism that combines the fluorescent light emitted from phosphor wheel, the light supplied from the red laser and the light supplied from the blue laser. The cross dichroic prism supplies the excitation light supplied from the excitation light sources to the collimator lens and the collimator lens condenses the incident excitation light on the phosphor wheel.
First claim
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What is claimed is: 1. A lighting device, comprising: an excitation light source unit that supplies excitation light; a phosphor unit that emits fluorescent light by excitation caused by excitation light supplied from said excitation light source unit; a collimator lens that converts fluorescent light emitted from said phosphor unit to parallel luminous flux; a first solid-state light source that supplies first light whose peak wavelength is set in a first wavelength band in…
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- What does patent US8955985B2 cover?
- A lighting device includes excitation light sources, phosphor wheel that emits green fluorescent light, a collimator lens that converts the emitted fluorescent light into parallel luminous flux, a red laser, a blue laser, a dichroic mirror that combines the excitation light supplied from the excitation light sources and the light supplied from the red laser, and a cross dichroic prism that comb…
- Who is the assignee on this patent?
- Matsubara Masateru, Saitou Hiroyuki, Nec Display Solutions Ltd
- What technology area does this patent fall under?
- Primary CPC classification G03B33/06. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 17 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).