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Title:
PROJECTION-TYPE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/115493
Kind Code:
A1
Abstract:
This projection-type display device (1) is equipped with a light-source group (100B), a collimating lens (107), light-condensing optical systems (95, 112), and a light-intensity-uniformizing element (113). The light-source group (100B) has a plurality of first light sources (110B) for emitting first light which forms the projection light. The collimating lens (107) emits the first light as a parallel pencil of light. The light-condensing optical systems (95, 112) have the parallel pencil of light incident thereon, and emit a condensed pencil of light. The light-intensity-uniformizing element (113) has the condensed pencil incident on the incident-end surface thereof, and emits a beam having an increased uniformity of light-intensity distribution. The parallel pencil of light is incident on different positions of the light-condensing optical systems (95, 112) in the plane perpendicular to the optical axis of the light-condensing optical systems (95, 112). The emission position of the condensed pencil of light on the emission surface of the light-condensing optical systems (95, 112) and the incidence position of the condensed pencil of light on the incident-end surface (113i) of the light-intensity-uniformizing element (113) are located on opposite sides from one another in relation to the optical axis of the light-condensing optical systems (95, 112).

Inventors:
YAMADA AKIHIRO (JP)
SAWANAKA TOMOHIKO (JP)
YAGYU SHINJI (JP)
KIDA HIROSHI (JP)
SAMEJIMA KENJI (JP)
Application Number:
PCT/JP2014/000054
Publication Date:
July 31, 2014
Filing Date:
January 09, 2014
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G03B21/14; F21S2/00; G02B19/00; F21Y101/02
Domestic Patent References:
WO2007108504A12007-09-27
Foreign References:
JP2005300712A2005-10-27
Attorney, Agent or Firm:
TAKAHASHI, Shogo et al. (JP)
Shogo Takahashi (JP)
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