Patent ID: 6814446
Filing Date: 2004-11-09
Classification: G03B,H04N

Abstract:
A rear projector, comprising:an image generator having an optical device that modulates a light beam irradiated by a light source in accordance with image information to form an optical image and a projection optical system that enlarges and projects the optical image; a box-shaped casing that accommodates the image generator; a screen exposed on any one of sides of the box-shaped casing that on which the optical image formed by the image generator is projected; an intake opening that introduces a cooling air to the image generator is formed on a first lateral side of the casing adjacent to a first edge of the screen other than the side provided with the screen; an exhaust opening that discharges the air after cooling the image generator is formed on a second lateral side of the casing adjacent to a second edge of the screen opposite to the first edge of the screen; and a cooling channel for the cooling air to be flowed is formed inside the casing along the surface of the screen.