公开(公告)号：US10819963B2

公开(公告)日：2020-10-27

申请号：US16542302

申请日：2019-08-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshiteru Mino ,  Kosuke Kubota ,  Masahito Ogata ,  Yuta Yamamoto

IPC: H04N9/31 ,  B60K37/02 ,  G03B21/14

Abstract: A display device has a movable screen that is movable in a movement direction, a drive controller, a projector, and a position detector. The drive controller moves the movable screen relative to a reference position set at a prescribed position in a movement range of the movable screen. The projector performs drawing on the movable screen by irradiating the movable screen with light used for scanning the movable screen and projects a virtual image onto a target space based on light that passes through the movable screen. The position detector executes position detection processing for detecting that the movable screen is located at a detection position set in relation to the prescribed position. The position detector moves the movable screen and executes the position detection processing in a non-display period in which the movable screen is not irradiated with light from the projector.

公开(公告)号：US10701323B2

公开(公告)日：2020-06-30

申请号：US16363580

申请日：2019-03-25

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Fumihito Inukai ,  Kosuke Kubota ,  Yukihiro Chokyu

IPC: G06F3/038 ,  G09G5/00 ,  H04N9/31 ,  H03M1/66

Abstract: The image display system includes a processing unit and a driving unit. The processing unit is configured to receive an image signal indicative of an instruction value of luminance of a light source. The driving unit is configured to supply a drive current to the light source in accordance with the instruction value indicated by the image signal received by the processing unit. The driving unit includes a shaping circuit and an adjusting unit. The shaping circuit includes a plurality of D/A converters and an arithmetic unit. The arithmetic unit is configured to output the drive current to the light source based on a computation result of analog signals outputted from the plurality of D/A converters. The adjusting unit is configured to determine values of digital signals inputted into the plurality of D/A converters of the shaping circuit in accordance with the instruction value.