A driving apparatus allows simple detection of the light writing characteristic of light writing means, such as a CRT, without detaching the light writing means from the liquid crystal light valve. A display apparatus uses such a photoconductive liquid crystal light valve. The driving apparatus applies...http://www.google.com.tw/patents/US5432567?utm_source=gb-gplus-share專利 US5432567 - Apparatus for driving photoconductive liquid crystal light valve having write intensity detecting function and display apparatus using such light valve
