Patent ID: 9703137
Date: 2017-07-11
CPC Classifications: G02F,G03B

Claim:
1. A rear projection display device, comprising a screen and a light source, wherein the screen comprises: a transmissive diffuser; a liquid crystal layer arranged on the rear surface side of the diffuser; and on the side of a first surface of the liquid crystal layer, first and second alternated parallel conductive strips regularly distributed across the entire surface of the screen, the first strips being interconnected, and the second strips being interconnected without being connected to the first strips, and wherein the light source is capable of projecting an image on the back of the screen a rear surface of the screen; and wherein the screen generates a light flow of preferred images to a viewer, and projection angles of different distributions of the projected light flow are modifiable by appropriately controlling the values of index gradients of the liquid crystal layer by a refractive deviation.