PRODUCTION OF LIQUID CRYSTAL ELEMENT

• Main Authors: KATAOKA NOBUE, NITO KEIICHI, FUJIOKA TAKAYUKI, YASUDA AKIO
• Format: Patent
• Language: English
• Published: 10.04.1998
• Edition: 6
• Subjects: ADVERTISING; 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; FREQUENCY-CHANGING; LABELS OR NAME-PLATES; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To improve injection property and dispensability of a liquid crystal and to uniformly obtain a voltage-transmittance curve with high linearity all over the plane by injecting a liquid crystal between a pair of substrates, cooling the liquid crystal to the temp. to show a chiral smectic C phase and then increasing the temp. to show a chiral nematic phase. SOLUTION: A liquid crystal is injected between a pair of substrates at the temp. at which the liquid crystal shows N* (chiral nematic phase) (an arrow I), cooled to the temp. at which the liquid crystal shows SmC* (chiral smectic C phase) (an arrow II) after injection, and then further heated to the temp. at which the liquid crystal shows N* (chiral nematic phase) (an arrow III). Therefore, by injecting the liquid crystal while viscosity of the liquid crystal is maintained to a certain degree, dispersibility of a component such as fine particles in the liquid crystal is increased. By heating the liquid crystal to N* after cooling to SmC*, reorientation of the liquid crystal can be effectively performed and uniform orientation can be obtd. for the whole plane. Thus, characteristics with good linearity and easy controlling of gradation can be obtd.