LIGHT REFLECTION SHEET AND OPTICAL MEMBER

• Main Authors: WAKAHARA RYUICHI, TABATA HISANORI, KAWADA YUJI
• Format: Patent
• Language: English; Japanese
• Published: 24.06.2019
• 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; MECHANICAL ENGINEERING; NON-LINEAR OPTICS; NON-PORTABLE LIGHTING DEVICES; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To provide a light reflection sheet which exhibits high light guide property and has good productivity even when being stuck to a light guide plate and used, in a surface light source device such as a liquid crystal display.SOLUTION: A light reflection sheet has a low refractive index layer 2 having a reflective index of 1.35 or less and a resin layer 3 which does not substantially contain inorganic particles, in which the low refractive index layer 2 and the resin layer 3 are brought into contact with each other, the resin layer 1 contains a polyester resin, and the low refractive index layer 2 contains hollow particles and has a thickness of 10-1,000 nm.SELECTED DRAWING: Figure 1 【課題】液晶ディスプレイなどの面光源装置において、導光板と貼り合わせて用いられた場合でも、高い導光性を示し、また生産性の良い光反射シートを提供する。【解決手段】屈折率が１．３５以下の低屈折率層２と無機粒子を実質的に含有しない樹脂層３を有し、前記低屈折率層２と前記樹脂層３が接し、前記樹脂層１がポリエステル樹脂を含み、前記低屈折率層２が中空粒子を含有して、その厚みが１０〜１０００ｎｍであることを特徴とする。【選択図】図１