Light source unit and projector

Patent metadata

Field	Value
Publication number	US-9200768-B2
Application number	US-201313801995-A
Country	US
Kind code	B2
Filing date	Mar 13, 2013
Priority date	Mar 14, 2012
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

A light source unit includes an excitation light source, a plurality of light sources at least one of which emits a light ray in a wavelength band different from that of the excitation light source, a plurality of collimator lenses which make light rays from the light sources into parallel ones, a luminous light emitting device which receives the light ray from the excitation light source to emit a luminous light ray, a microlens array which diffuses the light rays from the light sources to a predetermined range and distributes the luminance thereof uniformly within the predetermined range and a collective lens which collects the light rays from the light sources which are emitted from the microlens array, and the light sources are disposed so that the light rays from the plurality of light sources intersect the light ray from the excitation light source at right angles.

First claim

What is claimed is:

1. A light source unit comprising:
an excitation light source;
a luminous light emitting plate which faces oppositely the excitation light source and which emits luminous light when light emitted from the excitation light source is emitted onto the luminous light emitting plate;
a two-color light source device comprising:
a first semiconductor light emitting element which emits a first light ray in a wavelength band which is different from a wavelength ban…

Assignees

• Casio Computer Co Ltd

Inventors

• Ogura Naotsugu
• Nakamura Hideki
• Kurosaki Hideyuki
• Nagao Tomoyuki
• Sato Makoto
• Ogino Hiroshi

Classifications

• H04N9/315

  Electricity · mapped topic

• G03B21/204

  Physics · mapped topic

• G03B21/2013 Primary

  Physics · mapped topic

• G03B33/12

  Physics · mapped topic

• G03B21/14

  Physics · mapped topic