LIGHT GUIDE DEVICE, SURFACE LIGHT SOURCE DEVICE AND DISPLAY DEVICE

• Main Author: ASANO EIJI
• Format: Patent
• Language: English; Japanese
• Published: 22.12.2016
• 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; LIGHTING; MECHANICAL ENGINEERING; 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

PROBLEM TO BE SOLVED: To provide a light guide device capable of making a light-dark difference and hue inconspicuous generating in a region closer to an incident surface out of an emission surface.SOLUTION: A light guide device 2 includes: a light guide plate 30 including an emission surface 31, a rear surface 32 opposing to the emission surface 31, an incident surface 33 comprising one part of a side surface between the emission surface 31 and the rear surface 32, and an opposite surface 34 comprising one part of the side surface and opposing to one incident surface 33 along a first direction d1; and a reflection layer 28 arranged opposing to the rear surface 32 of the light guide plate 30. The rear surface 32 of the light guide plate 30 includes: a reflection region 32a including a plurality of inclined surfaces 37 arrayed in the first direction d1; and a light transmission region 32b provided in a position closer to the incident surface 33 than the reflection region 32a. The light transmission region 32b refracts the light from the incident surface 33, guides it to the reflection layer 28, transmits at least one part of the light reflected at the reflection layer 28 and guides it to the emission surface 31.SELECTED DRAWING: Figure 6 【課題】出光面のうちの入光面寄りの領域に生じる得る明暗差及び色味を目立たなくさせることが可能な導光装置を提供する。【解決手段】導光装置２は、出光面３１と、出光面３１に対向する裏面３２と、出光面３１と裏面３２との間の側面の一部分からなる入光面３３と、前記側面の一部分からなり第１方向ｄ１に沿って一つの入光面３３に対向する反対面３４と、を有する導光板３０と、導光板３０の裏面３２に対向して配置された反射層２８と、を備える。導光板３０の裏面３２は、第１方向ｄ１に配列された複数の傾斜面３７を含む反射領域３２ａと、反射領域３２ａよりも入光面３３に近接した位置に設けられた光透過領域３２ｂと、を含む。光透過領域３２ｂは、入光面３３からの光を屈折して反射層２８に導き、反射層２８で反射した光のうちの少なくとも一部を透過させて出光面３１に導く。【選択図】図６