BACK LIGHT UNIT DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• Main Authors: LEE YOUNG CHOL, JEON DUK JIN, JANG NAE WON, NA JEONG SHAN
• Format: Patent
• Language: English; Korean
• Published: 29.11.2022
• Subjects: BLASTING; 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; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; WEAPONS

A backlight unit of the present disclosure includes: a substrate; a light source disposed on one surface of the substrate to irradiate light; a diffusion layer disposed on one surface of a substrate, having an open area surrounding a light source, and including a plurality of reflective particles diffusing light emitted from the light source in a lateral direction; and an optical guide disposed in the open area of the diffusion layer, in contact with an upper surface of the light source, and scattering the light emitted upward from the light source to diffuse it in multiple directions, wherein the diffusion layer and the optical guide may be tightly coupled such that side surfaces are in contact with each other. Accordingly, a Mura phenomenon is prevented and image quality is improved. 본 개시의 백라이트 유닛은, 기판, 기판의 일 면에 배치되어 빛을 조사하는 광원, 기판의 일 면에 배치되며 광원을 둘러싸는 영역이 개방되고, 광원에서 조사되는 빛을 측면 방향으로 확산시키는 복수의 반사 입자를 포함하는 확산층 및 확산층의 개방된 영역에 배치되며, 광원의 상면과 접하며, 광원에서 상부로 출사되는 빛을 산란시켜 다방향으로 확산시키는 광학 가이드를 포함하고, 확산층과 광학 가이드는 상호 측면이 접하도록 밀착 결합될 수 있다.