LIQUID CRYSTAL ELECTRO-OPTIC DEVICE, PROJECTION TYPE DISPLAY SYSTEM USING THE SAME AND METHOD FOR DRIVING LIQUID CRYSTAL ELECTRO-OPTIC DEVICE

摘要

PURPOSE:To obtain a liquid crystal electro-optic device with which an improvement in dependency on visual angles is possible and a display of high luminance and high contrast is obtainable with a low driving voltage by specifying the torsional pitch of liquid crystals to a specific value. CONSTITUTION:This liquid crystal electro-optic device is formed by holding a liquid crystal layer 10 consisting of the nematic liquid crystals having a negative dielectric property added with a chiral dopant between a pair of substrates 1 and 2 stuck to each other by seals 8, 9 via spacers 7. The torsional pitch of the liquid crystals is set at about 4 times the thickness of the liquid crystal layer 10. The respective substrates 1, 2 are formed with electrodes 3, 4 on their liquid crystal layer 10 side surfaces and liquid crystal oriented films 5, 6 for orienting liquid crystal molecules nearly perpendicularly to the substrates are formed on their surfaces. The surfaces of the respective substrates 1, 2 on the side opposite to the liquid crystal layer 10 are provided with polarizing plates 11, 12 in such a manner that their axes of polarization are perpendicular to each other.