OPTICAL DIFFUSER FOR LCD USING STEROLITHOGRAPHY AND METHOD FOR PREPARING THE SAME

• Main Authors: HWANG, YUN IL, MUN, JE MIN
• Format: Patent
• Language: English; Korean
• Published: 17.04.2004
• Edition: 7
• 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 light diffuser for a liquid crystal display using stereolithography and a method for fabricating the light diffuser are provided to fabricate the light diffuser using a three-dimensional stereolithography method in order to accurately control the angle and direction of lights. CONSTITUTION: A photosensitive composition including optical monomer is coated on a transparent glass substrate using a spin coater by 1 to 20 micrometer, to form a photosensitive layer. The photosensitive composition has a monomer form or a polymer form. The photosensitive composition has a refractive index of 1.3 to 1.9. The photosensitive composition is pre-processed at a low temperature when spin-coated. The substrate on which the photosensitive layer is formed is pre-processed at a temperature of 50 to 150 degrees, and a CAD pattern is transferred to the substrate using stereolithography. The substrate is post-processed at a temperature of 150 to 300 degrees, to form a micro-domain(9) where a portion to which laser has been irradiated and a portion to which laser has not been irradiated have different refractive indexes. 본 발명은 스테레오 리소그래피를 이용한 액정디스플레이용 광 확산판 및 그 제조 방법에 관한 것으로, 보다 상세하게는 유리나 플라스틱의 기판 위에 광에 반응하는 감광성조성물을 코팅하거나 필름형태로 가공한 후, 레이저(Laser)를 이용한 3 차원 스테레오 리소그래피 (Stereolithography) 기술로 3차원의 광 패턴을 형성함으로써 액정 디스플레이(LCD)의 셀 내부 또는 셀 외부에 위치하여 백 라이트 (Back Light) 또는 액정을 통과한 직진성의 광을 확산시켜줄 수 있는 스테레오 리소그래피를 이용한 액정디스플레이용 광 확산판 및 그 제조 방법에 관한 것이다.