Invention Grant
- Patent Title: Video display device
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Application No.: US18039529Application Date: 2022-01-13
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Publication No.: US12073739B2Publication Date: 2024-08-27
- Inventor: Tetsuya Hayakawa
- Applicant: SEGA FAVE CORPORATION
- Applicant Address: JP Tokyo
- Assignee: SEGA FAVE CORPORATION
- Current Assignee: SEGA FAVE CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP 21006637 2021.01.19
- International Application: PCT/JP2022/000882 2022.01.13
- International Announcement: WO2022/158364A 2022.07.28
- Date entered country: 2023-05-31
- Main IPC: G09B27/00
- IPC: G09B27/00 ; F21V9/40 ; F21V11/14 ; F21V13/02 ; F21V14/08 ; F21W121/00

Abstract:
The present invention addresses the problem of providing a video display device that projects and displays video including starry sky images onto a target surface, that can reproduce the twinkling of stars and that can more faithfully reproduce an actual starry sky. Provided are a light source, a projection lens, a starry-sky projection negative plate, a twinkling negative plate with uneven light-transmitting properties, a starry-sky-end support unit that supports the starry-sky projection negative plate in a location onto which light from the light source is radiated, a twinkling-end support unit that supports the twinkling negative plate between the starry-sky projection negative plate and the projection lens or between the light source and the starry-sky projection negative plate, and an actuation mechanism that rotationally actuates, by power from an actuator, the starry-sky projection negative plate in a state of being supported by the starry-sky-end support unit and the twinkling negative plate in a state of being supported by the twinkling-end support unit. Light that has penetrated the starry-sky projection negative plate and the twinkling negative plate is radiated onto the target surface via the projection lens.
Public/Granted literature
- US20230419863A1 VIDEO DISPLAY DEVICE Public/Granted day:2023-12-28
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