METHOD AND DEVICE FOR CHARGING LIQUID CRYSTAL

• Main Authors: SHIBATA TADAHIKO, TAKUMI MITSUTOSHI, YAMAMOTO NORIO, SAKAIDA ATSUSHI, SUZUKI MASANORI
• Format: Patent
• Language: English
• Published: 17.06.1985
• 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

PURPOSE:To shorten a necessary charging time which is about 90min conventionally to about 4min by dripping liquid crystal on a glass plate, sticking the other glass plate, and discharging air. CONSTITUTION:A necessary amount plus 10-20% of liquid crystal 4 is dripped quantitatively on a lower soda glass plate 1a at a set position inside an adhesive 1c at atmospheric pressure from above. An upper soda glass plate 1b is inserted into a lower jig 2 and then orientation film patterns of both glass plates 1a and 1b are matched with each other automatically. They are put in a vacuum chamber 5, which is evacuated, so that the two soda glass plates 1a and 1b curve around the layer of the adhesive 1c as a fulcrum as shown in a figure. The gap at the center part of the soda glass plates 1a and 1b becomes large, so the liquid crystal 4 moves to the adhesive 1c by surface tension and the air 6 in the gap gathers in the center of the soda glass plates 1a and 1b. The pressure in the vacuum chamber 5 is returned to the atmospheric pressure. When a loaded roller 7 is rolled on the top surface of the soda glass plates 1a and 1b to apply pressure, the air 6 in the glass substrate 1 moves to one open side 1d and is discharged.