METHOD FOR MANUFACTURING OPTICAL DEFLECTION ELEMENT, OPTICAL DEFLECTION DEVICE AND PICTURE DISPLAY DEVICE

• Main Authors: KOBAYASHI MASANORI, TAKIGUCHI YASUYUKI, SUGIMOTO HIROYUKI, TOKITA TOSHIAKI, FUTAMURA YOSHIROU, MATSUKI YUMI
• Format: Patent
• Language: English
• Published: 28.03.2003
• Edition: 7
• Subjects: ACCESSORIES THEREFOR; ADVERTISING; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; CRYPTOGRAPHY; 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; DISPLAY; DISPLAYING; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; FREQUENCY-CHANGING; HOLOGRAPHY; LABELS OR NAME-PLATES; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical deflection element with which the optical deflection element in a vertical alignment state without any defect is manufactured in manufacturing the optical deflection element attaining a fast pixel shift with simple construction. SOLUTION: In the method for manufacturing the optical deflection element 1 provided with a pair of transparent substrates 2, 3, an alignment layer 4 vertically aligning liquid crystal molecules between a pair of the substrates 2, 3, a liquid crystal layer 5 forming a chiral smectic C phase without application of an electric field and a pair of electrodes 6a, 6b producing the electric field in a direction nearly parallel to the liquid crystal layer 5, the substrates 2, 3 are heated to isotropic phase transition temperature of the liquid crystal or higher in injecting the liquid crystal into the element. During a period in which the injected liquid crystal is cooled from a temperature of the isotropic phase to a temperature to form the chiral smectic C phase or lower, an alternating current voltage with a frequency higher than a driving frequency of the optical deflection element is applied to the liquid crystal layer and the liquid crystal molecules in the liquid crystal layer 5 are aligned to the alignment state nearly vertical to the substrates 2, 3.