Invention Grant
US08876301B2 Video projection device easy for adjustment work 有权
视频投影设备易于调整工作

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.
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