백라이트 유닛 및 화상 표시 장치

• Main Authors: MORISHIMA RYOTA, KISHI ATSUSHI, HATTORI DAISUKE, YOSHIKAWA TAKAHIRO
• Format: Patent
• Language: Korean
• Published: 06.12.2022
• 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; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS; LIGHTING; MECHANICAL ENGINEERING; NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; NON-LINEAR OPTICS; NON-PORTABLE LIGHTING DEVICES; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SYSTEMS THEREOF; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

휘도의 균일성이 우수한 백라이트 유닛이 제공된다. 본 발명의 백라이트 유닛은, 광원과 ; 광원에 대향하여 배치된, 광원으로부터의 광이 입사되는 단면과 입사된 광을 출사시키는 출사면을 갖는 도광판과 ; 도광판의 배면측에 양면 점착 필름을 개재하여 첩합된 반사판과 ; 전면부와 배면부를 갖고, 광원, 도광판 및 반사판을 수용하는 케이싱을 구비한다. 양면 점착 필름은, 도광판 측으로부터 순서대로, 제 1 점착제층과 저굴절률층과 제 2 점착제층을 갖는다. 백라이트 유닛은, 저굴절률층과 반사판 사이에 광원으로부터의 광이 입사되지 않도록, 또는, 광원으로부터 저굴절률층과 반사판 사이에 입사된 광이 도광판의 출사면으로부터 출사되지 않도록 구성되어 있다. There is provided a backlight unit excellent in brightness uniformity. The backlight unit includes: a light source; a light guide plate that is arranged to face the light source, having an end surface that light from the light source enters; and an emitting surface from which the entered light is emitted; a reflective plate bonded to a back surface side of the light guide plate via a double-sided pressure-sensitive adhesive film; and a casing having a front portion and a back portion, the casing being configured to store the light source, the light guide plate, and the reflective plate. The backlight unit is configured so that the light from the light source is free from entering a space between the low-refractive index layer and the reflective plate, or so that the light that has entered the space between the low-refractive index layer and the reflective plate from a light source is free from being emitted from the emitting surface of the light guide plate.