Title:
LIGHT SOURCE UNIT AND PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/189871
Kind Code:
A1
Abstract:
This light source unit, which irradiates a liquid crystal panel (17) with light, comprises light sources (12), aspherical plano-convex lenses (13) and a Fresnel lens (14) for collimating light from the light sources (12), and a polarization conversion element (16) for aligning a polarization direction with a specified direction and enabling emission from an emission surface So without blocking any direction of polarization of light coming from an incident surface Si. The prescribed direction is a direction in which the liquid crystal panel (17) transmits light. The amount of light lost is thereby reduced in light emitted from the light sources (12) and transmitted through the liquid crystal panel.
Inventors:
MATSUHASHI YUSUKE (JP)
MIZUMA JUNICHI (JP)
MIZUMA JUNICHI (JP)
Application Number:
PCT/JP2016/002549
Publication Date:
December 01, 2016
Filing Date:
May 26, 2016
Export Citation:
Assignee:
DEXERIALS CORP (JP)
International Classes:
G03B21/14; B60K35/00; G02F1/13; G02F1/13357; G03B21/00
Foreign References:
| JP2006227361A | 2006-08-31 | |||
| JP2006330282A | 2006-12-07 | |||
| JP2005208571A | 2005-08-04 | |||
| JPH04362902A | 1992-12-15 | |||
| JP2013024971A | 2013-02-04 |
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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