US 11,899,210 B2
Wearable image display device
Makoto Masuda, Kyoto (JP); and Nobuhiro Shirai, Kyoto (JP)
Assigned to BLUE OPTECH CO., LTD., Kyoto (JP)
Appl. No. 16/969,777
Filed by Blue Optech Co., Ltd., Kyoto (JP)
PCT Filed Oct. 23, 2018, PCT No. PCT/JP2018/039274
§ 371(c)(1), (2) Date Aug. 13, 2020,
PCT Pub. No. WO2019/159436, PCT Pub. Date Aug. 22, 2019.
Claims priority of application No. 2018-023201 (JP), filed on Feb. 13, 2018.
Prior Publication US 2020/0409155 A1, Dec. 31, 2020
Int. Cl. G02B 27/01 (2006.01); G02B 27/28 (2006.01); G02F 1/1362 (2006.01); F21V 8/00 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/0035 (2013.01); G02B 27/283 (2013.01); G02B 27/286 (2013.01); G02F 1/136277 (2013.01); G02B 2027/0178 (2013.01); G02F 2203/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A wearable image display comprising:
an image light output unit for outputting an image as image light;
an image light transmission unit for transmitting the image light output from the image light output unit;
an image light emitting unit for emitting the image light transmitted from the image light transmission unit to the outside;
wherein:
the image light output unit and a part of the image light transmission unit constitutes an image source side section;
the rest of the image light transmission unit and the image light emitting unit constitute an image display side section;
the image source side section and the image display side section are separately divided into unit structures,
the image light output unit includes:
a light source,
a light control component for controlling the light from the light source to make a controlled light, and
a reflective image modulation device for reflecting the controlled light to output the image light;
the image light transmission unit includes:
a polarization beam splitter for reflecting the controlled light from the light control component to the reflective image modulation device,
a light reflector for reflecting the image light from the reflective image modulation device passing through the polarization beam splitter to the polarization beam splitter side,
a quarter-wave plate disposed between the polarization beam splitter and the light reflector,
a transit optics for relaying the image light from the reflective image modulation device, passing though the polarization beam splitter, passing though the quarter-wave plate, reflected by the light reflector, passing though the quarter-wave plate again and reflected by the polarization beam splitter, and
a light guide plate for guiding the image light relayed by the transit optics to the image light output unit;
the image light output unit includes:
a plurality of half mirrors disposed in a light guide plate for emitting the image light guided in the light guide plate to the outside;
the image source side section includes the light source, the light control component, the reflection type image modulation device, the light reflector and the quarter-wave plate in a unit structure; and
the image display side section includes the polarization beam splitter, the transit optics, the light guide plate, and the plurality of half mirrors in a unit structure.