04389096 is referenced by 280 patents and cites 13 patents.

A liquid crystal light valve projection type image display apparatus comprises an electro-optic element and a Schlieren optical system. The electro-optic element has a liquid crystal layer having a dielectric and optical anisotropy. An electric field having a spatial intensity distribution according to an image signal is applied to said liquid crystal at a spatial period, so that a spatially phase-modulated phase diffraction grating is formed in the liquid crystal layer. Thus, a projected image in enlarged form is obtained. The fact that the electric field with a spatial period is applied to the liquid crystal leads to a constant light diffraction angle, and the modulation of the diffraction light intensity in the applied electric field enables an image corresponding to the input image signal to be projected at high light utilization.

Title
Image display apparatus of liquid crystal valve projection type
Application Number
561
Publication Number
4389096
Application Date
February 23, 1981
Publication Date
June 21, 1983
Inventor
Masakazu Fukai
Nishinomiya
JP
Komei Asai
Hirakata
JP
Yoshikazu Hori
Hirakata
JP
Agent
Stevens Davis Miller & Mosher
Assignee
Matsushita Electric Industrial
JP
IPC
G02F 1/13
View Original Source