The patent application date is 1994.03. 12.
Color liquid crystal display device
Release (Announcement)No. CN 1094 167
Release date (announcement) 1994 438+00.26
Category physics
Certification date
Priority1993.3.12 jp52509/93; 1993 . 4 . 12 JP 84758/93； 1993 . 4 . 19 JP 9 1 158/93； 1993 . 4 . 20 JP 92666/93； 1993 . 4 . 2 1 JP 943 12/93
Casio Computer Company Application (Patent)
Address Tokyo Japan
Inventor (designer) Nishino Harumi; History of Xitian VIII; Zheng Zhi, Gao Qiao
International application
International announcement
date of entry
Patent Agent Yongxin Patent Trademark Agency Co., Ltd.
Special agent Weiwei
abstract
A pair of polarizers are arranged on both sides of TN-type liquid crystal display screen, which is composed of twisted and collimated liquid crystals with a twist angle of 80 to120. The retardation plate is arrange between one of that polarizing plate and the liquid crystal screen, and the optical axis of the retardation plate intersects the transmission axis of the adjacent polarizing plate at an angle of 45 degrees. The polarization plate pairs are arranged such that their transmission axes are parallel to each other. The liquid crystal panel is arrange such that that optical axis of the retardation plate intersects the collimate direction of liquid crystal molecules adjacent to the substrate side of the retardation plate at an angle of 45 degrees. The liquid crystal driving circuit is connected to the liquid crystal screen for changing the voltage on the liquid crystal to change the polarization state of the light passing through the liquid crystal, thereby changing the color of the emitted light.
Sovereignty terms
A color liquid crystal display device includes a pair of substrates with opposite surfaces, electrodes respectively formed on the opposite surfaces, and collimating films respectively formed to cover the electrodes, and the collimating films have been collimated in a predetermined direction; A liquid crystal layer formed between the pair of substrates, the liquid crystal layer having liquid crystal molecules arranged to twist from one substrate to the other at a twist angle of 80 to120; A pair of polarizing plates arranged outside the substrate pair to sandwich the substrate, the polarizing plate pair respectively having transmission axes for linearly polarizing incident light; A retardation plate arranged between the pair of polarizers so that the angle defined by the optical axis of the retardation plate and the transmission axis of an adjacent polarizer becomes 45+/-5 degrees, and the optical axis is in the plane direction of the retardation plate, and the refractive index along the optical axis is the largest; And a voltage applying device connected to the electrode for changing the voltage applied to the liquid crystal layer to change the polarization state of light passing through the liquid crystal layer, thereby changing the color of light passing through the polarizing plate on the exit side.