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1. WO2020246691 - DEVICE FOR DETECTING LIQUID CRYSTAL MURA IN POLARIZING PLATE, AND METHOD FOR DETECTING LIQUID CRYSTAL MURA IN POLARIZING PLATE

Publication Number WO/2020/246691
Publication Date 10.12.2020
International Application No. PCT/KR2020/003256
International Filing Date 09.03.2020
IPC
G02F 1/13 2006.01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour
13based on liquid crystals, e.g. single liquid crystal display cells
G02F 1/1335 2006.01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour
13based on liquid crystals, e.g. single liquid crystal display cells
133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333Constructional arrangements
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
Applicants
  • 주식회사 엘지화학 LG CHEM, LTD. [KR]/[KR]
Inventors
  • 류재일 RYU, Jae Il
  • 남택근 NAM, Taek Geun
  • 유제혁 YOO, Je Hyuk
Agents
  • 특허법인 다나 DANA PATENT LAW FIRM
Priority Data
10-2019-006754307.06.2019KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) DEVICE FOR DETECTING LIQUID CRYSTAL MURA IN POLARIZING PLATE, AND METHOD FOR DETECTING LIQUID CRYSTAL MURA IN POLARIZING PLATE
(FR) DISPOSITIF ET PROCÉDÉ DE DÉTECTION D'UN EFFET MURA DE CRISTAUX LIQUIDES DANS UNE PLAQUE DE POLARISATION
(KO) 편광판의 액정얼룩 검사장치 및 편광판의 액정얼룩 검사방법
Abstract
(EN)
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.
(FR)
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.
(KO)
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.
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