Invention Grant
- Patent Title: Video projection device easy for adjustment work
- Patent Title (中): 视频投影设备易于调整工作
-
Application No.: US13603012Application Date: 2012-09-04
-
Publication No.: US08876301B2Publication Date: 2014-11-04
- Inventor: Kenichiro Okura , Haruhiko Matoba , Kohei Eto
- Applicant: Kenichiro Okura , Haruhiko Matoba , Kohei Eto
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2012-034600 20120221
- Main IPC: G03B21/22
- IPC: G03B21/22

Abstract:
A video projection device includes an optical engine, a projection lens, a reflection mirror, a non-spherical mirror, a screen, and a cabinet which covers the lower surface and the back surface of the screen. The projection lens and the non-spherical mirror are placed at an approximate center in the leftward and rightward directions of the screen and at a back portion within the cabinet. The reflection mirror is placed at an approximate center in the leftward and rightward directions of the screen and at a front portion within the cabinet. The video projection device further includes projection-unit structural members for integrally coupling the projection lens, the reflection mirror and the non-spherical mirror to each other, thereby forming a projection unit.
Public/Granted literature
- US20130215398A1 VIDEO PROJECTION DEVICE Public/Granted day:2013-08-22
Information query