Title:
照明光学系、およびそれを備えた投写型表示装置
Document Type and Number:
Japanese Patent JP5574459
Kind Code:
B2
Abstract:
Provided is a lighting optical system capable of increasing brightness without increasing etendue or device size. The lighting optical system includes first light source 10 for emitting first and second color lights R and G, and second light source 20 for emitting third color light B. First light source 10 includes semiconductor laser element 11a that emits a linearly polarized laser beam, excitation light generation means 18 for spatially and temporally separating the laser beam from semiconductor laser element 11a to generate first and second excitation lights E1 and E2, first phosphor 12 that emits first color light R by first excitation light E1, and second phosphor 13 that emits second color light G by second excitation light E2. Excitation light generation means 18 includes liquid crystal element 14 that converts the incident laser beam into two lights orthogonal to each other in polarization direction, and light space separation means 15 for spatially separating the two lights into first and second excitation lights E1 and E2 according to the difference Between the two lights in polarization direction.
More Like This:
Inventors:
Hiroyuki Saito
Application Number:
JP2012547625A
Publication Date:
August 20, 2014
Filing Date:
December 08, 2010
Export Citation:
Assignee:
NEC display solutions incorporated company
International Classes:
G03B21/14; F21S2/00; H04N9/31; F21Y101/02
Domestic Patent References:
| JP2012113224A | 2012-06-14 |
Attorney, Agent or Firm:
Akio Miyazaki
Masaaki Ogata
Masaaki Ogata