APPARATUS AND METHOD FOR INSPECTING SURFACE OF LIQUID CRYSTAL ALIGNMENT LAYER

• Main Authors: JUNG, CHI SUP, LEE, IK HEE
• Format: Patent
• Language: English
• Published: 17.12.2009
• Subjects: 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; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PURPOSE: A liquid crystal alignment film surface testing apparatus and a method thereof are provided to test a defect of a minute groove on a substrate with a minute groove like a rubbing groove formed on an alignment film of a liquid crystal display device. CONSTITUTION: A polarizer(12) is located between a light source part(10) and a to-be-tested object. The polarizer polarizes emitting light. The polarizer emits the polarized light on the surface of the to be tested object. A phase-contrast microscope detects and controls light incident on the surface of the to-be- tested object at a dead angle and reflected. A light source(11) of the light source unit is singular light and parallel light which does not have a coherent characteristic.