Title:
IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/156167
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an image display device capable of preventing the creation of stray light due to external light, improving the visibility for a user, and reducing the size of an optical system. The image display device according to the present invention comprises: a light source (1) for emitting light; a display element (3) for generating display light by receiving light from the light source; a light guide plate (5) for propagating the display light therethrough; an incidence element (4) for introducing the display light from the display element into the light guide plate; and a dynamic light-emitting diffraction grating (6) provided in the light guide plate for emitting the display light outside the light guide plate. The dynamic light-emitting diffraction grating (6) includes a plurality of divided dynamic diffraction grating elements in which light diffracting function is enabled or disabled in accordance with the application of a voltage. The image display device further includes a control unit for controlling the dynamic light-emitting diffraction grating so that the plurality of divided dynamic diffraction elements may only be enabled with the light diffracting function one at a time.
Inventors:
SUGIYAMA KEIJI
KASAZUMI KENICHI
KASAZUMI KENICHI
Application Number:
PCT/JP2014/001789
Publication Date:
October 02, 2014
Filing Date:
March 27, 2014
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
G02B27/01; G02B6/00; G02B17/08; G02B25/02
Domestic Patent References:
| WO2012046379A1 | 2012-04-12 |
Foreign References:
| US20110176218A1 | 2011-07-21 | |||
| JP2007011057A | 2007-01-18 | |||
| JP2007219106A | 2007-08-30 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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