Patent Number: 8,876,301

Title: Video projection device easy for adjustment work

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.

Inventors: Okura; Kenichiro (Tokyo, JP), Matoba; Haruhiko (Tokyo, JP), Eto; Kohei (Tokyo, JP)

Assignee: Mitsubishi Electric Corporation

International Classification: G03B 21/22 (20060101)

Expiration Date: 2019-11-04 0:00:00