BLACK INK COMPOSITION AND METHOD FOR REPAIRING LIQUID CRYSTAL PANEL USING THE SAME

• Main Authors: TSURUOKA YASUO, IWAMURO MITSUNORI, YOSHIDA TAKESHI
• Format: Patent
• Language: English
• Published: 20.01.2011
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; 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; DYES; FILLING PASTES; FREQUENCY-CHANGING; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a black ink composition that is cured at <80°C and has high solvent resistance after that so as to repair a liquid crystal panel having a light leakage caused by a defect of inner black matrix from the outside of the cell.SOLUTION: The black ink composition is used for light-shielding by coating from the outside of a liquid crystal panel for repairing of light leakage caused by a defect of a black matrix layer in the inside of liquid crystal panel in a panel picture frame part for shielding light from the back light of the liquid crystal panel. The black ink composition comprises a black pigment, a binder polymer having an acid value of ≥70 mgKOH/g, a melamine derivative and an organic solvent.