Title:
IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/176235
Kind Code:
A1
Abstract:
Provided is an image display device having scanning characteristics with excellent linearity without upsizing the device. This image display device is provided with a light scanning unit which performs scanning in a first direction and a second direction of an image plane with light emitted from a light source by the reciprocating rotational movement of the reflection plane of the light, and an optical system which enlarges the scanning angle of the light with which the scanning is performed, and the optical system comprises a free-form surface lens on the light scanning unit side, and comprises a free-form surface mirror on the image plane side. The length in the first direction may be longer than the length in the second direction, and the free-form surface mirror may be disposed such that the first direction becomes approximately parallel to a first plane defined by an incident light ray and a reflected light ray in the free-form surface mirror when the light scanning unit stands still in the middle of a scanning range.
Inventors:
HIRATA KOJI (JP)
YATSU MASAHIKO (JP)
YATSU MASAHIKO (JP)
Application Number:
PCT/JP2011/003557
Publication Date:
December 27, 2012
Filing Date:
June 22, 2011
Export Citation:
Assignee:
HITACHI CONSUMER ELECTRONICS (JP)
HIRATA KOJI (JP)
YATSU MASAHIKO (JP)
HIRATA KOJI (JP)
YATSU MASAHIKO (JP)
International Classes:
G02B26/10
Domestic Patent References:
| WO2009041342A1 | 2009-04-02 | |||
| WO2009057522A1 | 2009-05-07 |
Foreign References:
| JP2006323354A | 2006-11-30 | |||
| JP2007334240A | 2007-12-27 | |||
| JP2008151887A | 2008-07-03 | |||
| JP2010032797A | 2010-02-12 | |||
| JP2006337609A | 2006-12-14 | |||
| JP2008020822A | 2008-01-31 | |||
| JP2000196833A | 2000-07-14 | |||
| JPH01195416A | 1989-08-07 |
Attorney, Agent or Firm:
INOUE, Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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Claims: