Optical write type liquid crystal light valve

Abstract

Abstract PURPOSE:To write an image with high storage performance and high resolution while suppressing its lateral expansion by driving a photoconductive layer, formed on the transparent electrode on an optical write side, to a size within a specific range. CONSTITUTION:Transparent electrodes 3 and 4 are liquid crystal orienting films 5 and 6 are formed on the surfaces of transparent substrates 1 and 2 and a ferroelectric liquid crystal layer 7 is inserted between the films 5 and 6. Then the photoconductive layer 9 which is divided by insulators 10 to a 4 - 40mum<2> size is formed on the electrode on the optical write side. The light valve which is thus formed is applied with a DC bias voltage generated by superposing a high-frequency AC waveform to write an image, and then a sharp image of the same level as that when only a direct current is applied to an undivided light valve is obtained. Further, an excellent memory having no expansion of the liquid crystal molecule array state of an unwritten part is obtained. Consequently, high-resolution writing which is free from DC defect is enabled.

Inventors

• 👤 Shuhei Yamamoto
• 👤 修平 山本
• 👤 Naoki Kato
• 👤 直樹 加藤
• 👤 Teruo Ebihara
• 👤 照夫 海老原

Bibliographic Details