REFLECTION TYPE LIQUID CRYSTAL DISPLAY DEVICE

• Main Authors: KAMISAKA TETSUYA, TOYOOKA TAKEHIRO
• Format: Patent
• Language: English
• Published: 29.09.2000
• Edition: 7
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To obtain a reflection type liquid crystal display device having high reflectance that can obtain a display with good contrast and can realize a good achromatic color display, by applying a polarizing plate on only one face of a liquid crystal material layer and disposing a specified liquid crystal cell and an optical anisotropic material. SOLUTION: The twist angle θ1 of liquid crystal molecules in a liquid crystal material layer in a liquid crystal cell 3 from the polarizing plate 1 side to the reflector 4 side, the twist angle θ2 of the slow phase axis of an optical anisotropic material 2 from the polarizing plate 1 side to the reflector plate 3 side, the twist angle θ3 between the axes on the faces of the optical anisotropic material 2 and the liquid crystal material layer from the polarizing plate 1 side to the reflector plate 4 side, and the angle θ4 between the absorption axis 11 of the polarizing plate 1 and the slow phase axis of the optical anisortopic material 2 on the face facing the polarizing plate 1 size satisfy all of the relation of θ1=+40 deg. to +70 deg., θ2=-20 deg. to -50 deg., θ1+θ2=+11 deg. to +35 deg., θ3=+70 deg. to +110 deg., θ4=-15 deg. to +25 deg. or +75 deg. to +115 deg..