05276523 is referenced by 17 patents and cites 12 patents.

There is disclosed a video projector provided with automatic focusing function. An image is generated on a liquid crystal light valve according to the video signal, and this image is projected through a projection lens system. The aberration between the focal plane of the projection lens system and the projection surface, such as a screen, is detected, and the focal plane is shifted according to thus detected aberration, in such a manner that the focal plane coincides with the projection surface or screen.

Title
Liquid crystal television projector with automatic focus
Application Number
665993
Publication Number
5276523
Application Date
July 2, 1992
Publication Date
January 4, 1994
Inventor
Nobuo Minoura
Yokohama
JP
Katsumi Kurematsu
Kawasaki
JP
Agent
Morgan & Finnegan
Assignee
Canon Kabushiki Kaisha
JP
IPC
H04N 5/74
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