Light source unit including a light emitting plate on which a diffusive transmission area and a luminescent light emitting area are formed, and projector

Patent metadata

Field	Value
Publication number	US-8957366-B2
Application number	US-201213644206-A
Country	US
Kind code	B2
Filing date	Oct 3, 2012
Priority date	Oct 3, 2011
Publication date	Feb 17, 2015
Grant date	Feb 17, 2015

Abstract

There is provided a light source unit comprising a first and second light sources, a luminescent light emitting device having a light emitting plate, a light source control device controlling the illumination of the light sources and driving of the light emitting plate, and a light guiding optical system guiding light from the light sources and luminescent light from the light emitting plate so that optical axes coincide to be directed in the same direction, wherein the light emitting plate includes a first area with a luminescent material layer on a reflection layer, a second area transmitting light from the light sources while diffusing it and a third area with a luminescent material layer on a dichroic layer, and wherein the light emitting plate includes a drive motor positioning repeatedly sequentially the first, second and third areas in an optical axis position of light from the light sources.

First claim

What is claimed is:

1. A light source unit comprising:
a first light source and a second light source that emit light in different wavelength bands;
a luminescent light emitting device including a light emitting plate onto which light emitted from the first light source and the second light source is shone;
a light source control device that controls turning on of the first light source and the second light source and driving of the light emitting plate of the luminescent ligh…

Assignees

• Casio Computer Co Ltd

Inventors

• Miyazaki Takeshi

Classifications

• G03B21/204 Primary

  Physics · mapped topic

• G03B33/08

  Physics · mapped topic