Patent ID: 7314281
Filing Date: 2008-01-01
Classification: G03B,H04N

Abstract:
1. A projection display device, comprising: plural transmission screens each provided with a back surface layer having optical directivity on a back surface side, the transmission screens each having an image display portion of a different dimension to which an image is displayed, and each having light transmissivity; a projection device main body to project a projection light; an optical unit to guide the projection light from the projection device main body to the back surface of the transmission screen; and a supporting unit to support one transmission screen selected from the plural transmission screens and the projection device main body, an image being displayed on the transmission screen by allowing the projection light guided by the optical unit to pass through from the back surface side; and one of the transmission screens being selected from the plural transmission screens, and the selected transmission screen, the projection device main body, the optical unit, and the supporting unit being assembled.