DEVICE FOR DETECTING LIQUID CRYSTAL MURA IN POLARIZING PLATE, AND METHOD FOR DETECTING LIQUID CRYSTAL MURA IN POLARIZING PLATE

• Main Authors: RYU, Jae Il, NAM, Taek Geun, YOO, Je Hyuk
• Format: Patent
• Language: English; French; Korean
• Published: 10.12.2020
• 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

The present application relates to a device for detecting liquid crystal mura in a polarizing plate, and a method for detecting liquid crystal mura in a polarizing plate, and is characterized in that light applied from a surface light source is transmitted through a first polarizing member and reflected at the polarizing plate, the reflected light is applied to a second polarizing member, and liquid crystal mura in the polarizing plate is determined on the basis of the light transmitted through the second polarizing member, wherein the polarizing plate comprises, in order, a polarizer and a quarter wave plate including a liquid crystal film, and the light transmitted through the first polarizing member is applied to the quarter wave plate of the polarizing plate. La présente invention concerne un dispositif et un procédé de détection d'un effet mura de cristaux liquides dans une plaque de polarisation et est caractérisée en ce que la lumière appliquée à partir d'une source de lumière de surface est transmise à travers un premier élément de polarisation et réfléchie au niveau de la plaque de polarisation ; la lumière réfléchie est appliquée à un second élément de polarisation et un effet mura de cristaux liquides dans la plaque de polarisation est déterminé sur la base de la lumière transmise à travers le second élément de polarisation, la plaque de polarisation comprenant, dans l'ordre, un polariseur et une lame quart d'onde comprenant un film de cristaux liquides ; et la lumière transmise à travers le premier élément de polarisation est appliquée à la lame quart d'onde de la plaque de polarisation. 본 출원은 편광판의 액정얼룩 검사장치 및 편광판의 액정얼룩 검사방법에 관한 것으로, 면광원으로부터 인가된 광이 제1 편광부재를 투과하여 편광판에서 반사되고, 반사된 광이 제2 편광부재에 인가되며, 제2 편광부재를 투과한 광에 기초하여 편광판의 액정얼룩을 판단하며, 이때 편광판은 편광자 및 액정 필름을 포함하는 1/4 파장판을 순차로 포함하고, 제1 편광부재를 투과한 광은 편광판의 1/4 파장판으로 인가되도록 구성된 것을 특징으로 한다.