公开(公告)号：US10078236B2

公开(公告)日：2018-09-18

申请号：US15390822

申请日：2016-12-27

Applicant: Hitachi-LG Data Storage, Inc.

Inventor： Shingo Hayashi ,  Satoshi Ouchi ,  Yoshiho Seo ,  Tomoto Kawamura ,  Seiji Murata ,  Takahiro Matsuda ,  Toshiteru Nakamura

IPC: G02F1/133 ,  G02F1/137 ,  G02F1/163 ,  H04N9/31 ,  G02F1/1347 ,  G02F1/15 ,  G02F1/17 ,  G02B26/02 ,  G02B27/01

CPC classification number: G02F1/13318 ,  G02B26/02 ,  G02B27/0172 ,  G02B2027/0118 ,  G02F1/13471 ,  G02F1/137 ,  G02F1/15 ,  G02F1/163 ,  G02F1/172 ,  G02F2201/44 ,  H04N9/3155 ,  H04N9/3173

Abstract: There are provided a dimmer that can solve practical problems including burn-in and easily change a transmittance to external light and a video display device using the same. A dimmer includes a stack of two or more light control layers that change a transmittance to incident light by controlling an applied voltage in the incident direction of the incident light. A video display device includes a video generator that generates picture light; a video projector that projects the picture light as a virtual image in the field of view of a user; the dimmer disposed on the opposite side of the projecting side of the video projector to the user for adjusting the light quantity of external light to be entered to a user's eye through the video projector; and a light controller that controls the dimmer suitable for the luminosity of external light detected at an external light detector.