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Title:
PROJECTION TYPE DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2008065276
Kind Code:
A
Abstract:

To provide a projection type display device capable of mitigating complicatedness in a manufacturing step.

A reflection type polarization conversion film 27 has both of a function of converting at least one part of polarization direction in s-polarized light emitted from a polarization separation film 26 into polarization direction of p-polarized light (function as a retardation plate) and a function of reflecting the p-polarized light having the converted polarization direction and emitting the p-polarized light from a polarization conversion element 23 (function as a reflection film). Therefore, it becomes possible to constitute the retardation plate and the reflection film, for example, in the conventional configuration as one member without disposing them separately. As the result, the number of components of the polarization conversion element 23 can be reduced and the complicatedness in the manufacturing step can be mitigated. In its turn, the reduction of the number of components of the polarization conversion element 23 links to the mitigation of the complicatedness in the manufacturing step of a projector.


Inventors:
SAWAKI DAISUKE
Application Number:
JP2006246092A
Publication Date:
March 21, 2008
Filing Date:
September 11, 2006
Export Citation:
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Assignee:
SEIKO EPSON CORP
International Classes:
G03B21/00; G02B5/18; G02B5/30; G02F1/13; G02F1/1335; G03B21/14
Domestic Patent References:
JP2006003384A2006-01-05
JP2008065277A2008-03-21
JP2008065278A2008-03-21
JP2008065279A2008-03-21
JP2006227361A2006-08-31
JP2003167125A2003-06-13
JP2004145305A2004-05-20
JP2006064871A2006-03-09
JP2005037969A2005-02-10
JP2005128241A2005-05-19
JP4802951B22011-10-26
Attorney, Agent or Firm:
Kazuya Nishi
Masatake Shiga
Masakazu Aoyama



 
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