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Title:
PROJECTION-TYPE VIDEO-IMAGE-DISPLAYING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/080869
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a projection-type video-image-displaying device capable of efficiently displaying an image by reducing the loss of light in the device, the device also being suitable for reducing costs associated therewith. A projection-type image-displaying device is provided with a light source radiating white light, a rod lens, a rotary color filter (4), a DMD (10), illumination optical elements (5, 12, 18), a projection lens and a control device. The rod lens collects light from the light source and emits the light. The rotary color filter (4) is disposed in the vicinity of the emitting surface of the rod lens, and selectively transmits or reflects, from the white light, light of a specific color. The DMD (10) includes a plurality of pixels and modulates incident light in accordance with an image signal. The illumination optical elements (5, 12, 18) collect the emitted light from the rotary color filter and form illumination light for projection onto the DMD. The projection lens projects an image formed using the DMD. The control device controls the rotation of the rotary color filter to be synchronized with the image display by the DMD. The rotary color filter forms, on a part thereof, a light-emitting surface using light from the emitting surface of the rod lens. The DMD is disposed in a substantially conjugate relationship with the light-emitting surface on the rotary color filter.

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Inventors:
HIRATA KOJI (JP)
KIMURA NOBUYUKI (JP)
INADACHI YURIKO (JP)
Application Number:
PCT/JP2013/081071
Publication Date:
May 30, 2014
Filing Date:
November 18, 2013
Export Citation:
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Assignee:
HITACHI MAXELL (JP)
International Classes:
G03B21/14; G02B5/20; G03B21/00; H04N9/31
Domestic Patent References:
WO2007139011A12007-12-06
Foreign References:
JP2002131687A2002-05-09
JP2000284361A2000-10-13
JP2002277820A2002-09-25
JP2005070371A2005-03-17
JP4716528B22011-07-06
Other References:
See also references of EP 2924503A4
Attorney, Agent or Firm:
SEIRYO I. P. C. (JP)
青稜 patent business corporation (JP)
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