LIQUID CRYSTAL DISPLAY ELEMENT

• Main Authors: YOKOI KENYA, FUJIMURA HIROSHI
• Format: Patent
• Language: English
• Published: 16.04.1993
• 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 LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PURPOSE:To provide the liquid crystal display element which is improved in the visual field angle and brightness in a lateral visual angle direction by optimum disposition with polarizing plates by taking the optical anisotropy of plastic films into consideration. CONSTITUTION:Uniaxially stretched polyethylene terephthalate (1-PET) having about 100mum thickness is used for the plastic film substrates 1 disposed to face each other. Electrodes 2 and orientation control films 3 are deposited and formed on the inside surface of the plastic film substrate 1 and the peripheral edge parts thereof are sealed with a sealant 4. A liquid crystal 5 is sealed therein. The liquid crystal 5 is a chiral nematic liquid crystal and the thickness of the liquid crystal layer is 8.25mum. The twist angle thereof is specified to 200 deg.. The polarizing plates 6 are respectively stuck to the outside surfaces of the upper and lower substrates 1. The relations between the stretching direction (TD) of the substrates 1 and the rubbing direction of the orientation control film deposited on the substrates 1 are respectively set at about 45 deg. with both the upper and lower substrates 1.