公开(公告)号：US20170160621A1

公开(公告)日：2017-06-08

申请号：US15441758

申请日：2017-02-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takehiko YAMASHITA

IPC: G02F1/31 ,  G02F1/167 ,  G02F1/1333 ,  H04N9/31 ,  G03B21/62

CPC classification number: G03B21/62 ,  E06B3/6722 ,  G02B1/11 ,  G02F1/13306 ,  G02F1/1333 ,  G02F1/133502 ,  G02F1/133504 ,  G02F1/167 ,  G02F1/31 ,  G02F2001/1678 ,  G02F2201/38 ,  G02F2201/44 ,  G02F2203/01 ,  G02F2203/62 ,  G03B21/56 ,  H04N5/58 ,  H04N5/74 ,  H04N9/3141

Abstract: An image projection system includes a translucent screen, a projector that projects image light to the translucent screen, and a controller that controls the projector and the translucent screen. The translucent screen includes a first light control film configured to be switchable between a transmissive state for transmitting incident light therethrough and a diffusion state for diffusing incident light, and a second light control film configured such that the transmittance thereof with respect to incident light can be changed. The controller has: a first mode in which, in the state where the projector does not project image light, the first light control film is in the transmissive state and the second light control film is in the state of having transmittance for transmitting incident light therethrough; and a second mode in which, in the state where the projector projects image light, the first light control film is in the diffusion state and the second light control film is in the state of having transmittance lower than the transmittance in the first mode. The controller is settable to the first mode or the second mode.

公开(公告)号：US20190025692A1

公开(公告)日：2019-01-24

申请号：US16137070

申请日：2018-09-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takehiko YAMASHITA

IPC: G03B21/62 ,  G02F1/1347 ,  G02F1/1334 ,  H04N5/74 ,  G02B5/02

Abstract: A transparent screen which displays an image projected from a projector. The transparent screen includes a display panel including a diffusion film which diffuses projection light from the projector, and a tinted film which is disposed to be remoter from the projector than the diffusion film is and has a transmittance which is variable. The transparent screen includes a controller which performs control to decrease the transmittance of the tinted film when an illuminance of a site where the transparent screen is installed is equal to or higher than a first threshold, and performs control to increase the transmittance of the tinted film when the illuminance is equal to or lower than a second threshold lower than the first threshold.