OPTICAL DEVICE AND IMAGE PROJECTION APPARATUS INCLUDING THE SAME

Title:

OPTICAL DEVICE AND IMAGE PROJECTION APPARATUS INCLUDING THE SAME

Document Type and Number:

WIPO Patent Application WO/2015/183053

Kind Code:

A1

Abstract:

An optical device and an image projection apparatus including the same are disclosed. The optical device includes a laser diode for outputting a laser light having a predetermined wavelength, a polarization separator for transmitting a first polarized light of the laser light and reflecting a second polarized light of the laser light, a wheel including a wavelength conversion unit for converting a wavelength of the second polarized light of the laser light reflected by the polarization separator such that the second polarized light of the laser light corresponds to one selected from among a blue light, a green light, and a red light and a transmission unit for transmitting the other lights, a polarization converter for converting the light transmitted through the wheel into the first polarized light and outputting the converted first polarized light to the wheel, and an optical output unit for outputting the first polarized light from the polarization converter and the light converted in wavelength and reflected by the wheel. Consequently, it is possible to provide a compact optical device that is capable of achieving highly efficient light output.

Inventors:

JEOUNG BYUNGWOO (KR)
YEO SANGOK (KR)

Application Number:

PCT/KR2015/005449

Publication Date:

December 03, 2015

Filing Date:

May 30, 2015

Export Citation:

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Assignee:

LG ELECTRONICS INC (KR)

International Classes:

G02B26/08; G02B5/30; G03B21/14

Foreign References:

US20140118991A1	2014-05-01
US20130107225A1	2013-05-02
US20050237487A1	2005-10-27
US20130242534A1	2013-09-19
KR20100035775A	2010-04-07

Other References: