Patent ID: 7789516
Filing Date: 2010-09-07
Classification: G03B

Abstract:
1. A projection type image display device comprising: a cabinet; a screen disposed on a front side of the cabinet; a projection optical system, disposed below the screen, which enlarges and projects an image formed by a display element; an optical path changing unit, disposed below the projection optical system, which reflects the image enlarged and projected by the projection optical system; and a reflection unit, disposed obliquely to the screen and below the screen, which receives the image reflected by the optical path changing unit and reflects the image toward the screen, such that each light ray from the reflection unit to the screen is straight and not reflected between the reflection unit and the screen, wherein the projection optical system is disposed in a space above a horizontal plane that passes through a lower end of an effective plane of the reflection unit and is perpendicular to the screen, behind the front side of the cabinet, and below a lower light ray plane formed by a straight path of a light ray reflected from the reflection unit and incident on a bottom of the screen.