PREPARATION OF COLORED PATTERN

• Main Author: OBATA HIROYUKI
• Format: Patent
• Language: English
• Published: 28.05.1985
• 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 ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PURPOSE:To prepare a mass-producible colored pattern superior in resolution with high precision by selectively impressing voltage to each electrode, using a liquid contg. colored particles opposite in polarity to the impressed voltage, and attracting the colored particles toward the electrodes. CONSTITUTION:Electrically independent conductive patterns are formed on the surface of an insulating base 1, and a DC power source is connected to the first group of the conductive patterns 2a, 2b, 2c and a counter electrode 5. The polarity of the DC voltage is selected to the polarity reverse to that of the electrostatically charged colored particles. A liquid dispersion 6 contg. the colored particles dispersed into an insulating solvent is filled between a base 1 and the counter electrode 5. When voltage is impressed, the particles in the dispersion are moved along the electric field on the patterns 2a, 2b, 2c to form deposits 8a, 8b, 8c. An excess of the particles are washed off from the base 1 and the electrode 5 by using an insulating solvent 11 and the base 1 is freed of the solvent 11 and dried.