ILLUMINATION DEVICE AND DISPLAY DEVICE

• Main Authors: YAGI SHUGO, TSUBOOKA MASARU, KANBAYASHI YUICHI
• Format: Patent
• Language: English; Japanese
• Published: 06.09.2022
• 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; LIGHTING; MECHANICAL ENGINEERING; NON-LINEAR OPTICS; NON-PORTABLE LIGHTING DEVICES; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SYSTEMS THEREOF; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To provide an illumination device and a display device that suppress the occurrence of brightness unevenness.SOLUTION: In a liquid crystal display device, a backlight device (illumination device) 12 includes: a plurality of LEDs (light sources) 13 arranged in a row; a light guide plate 15 including at least a light entering end face 15A having a plate shape, the light entering end face including an outer peripheral edge face where light emitted from the plurality of LEDs 13 enters, and an end face opposite-to-incident light face 15D disposed at an opposite side to the light entering end face 15A, wherein one plate face serves as a light emission plate face from which light emits; and a light refracting portion 26, for reflecting incident light, comprising a plurality of unit light refracting portions 26A arranged side by side on the light entering end face 15A along an arrangement direction of the plurality of LEDs 13. The light refracting portion 26 is configured such that an occupation rate of the unit light refracting portions 26A in end side portions 15AE of the light entering end face 15A in the arrangement direction is less than an occupation rate of the unit light refracting portions 26A in a central side portion 15AC of the light entering end face 15A in the arrangement direction.SELECTED DRAWING: Figure 6 【課題】輝度ムラの発生を抑制する照明装置及び表示装置を提供する。【解決手段】液晶表示装置において、バックライト装置（照明装置）１２は、列をなして並ぶ複数のＬＥＤ（光源）１３と、板状をなしていて外周端面に複数のＬＥＤ１３から発せられた光が入射される入光端面１５Ａと入光端面１５Ａとは反対側に配される入光反対端面１５Ｄとが少なくとも含まれるとともに一方の板面が光を出射させる出光板面とされる導光板１５と、入光端面１５Ａにおいて複数のＬＥＤ１３の並び方向に沿って並ぶよう配される複数の単位光屈折部２６Ａからなり入射する光を屈折させる光屈折部２６と、を備える。光屈折部２６は、入光端面１５Ａのうちの並び方向についての端側部分１５ＡＥにおいて単位光屈折部２６Ａが占める占有率が、入光端面１５Ａのうちの並び方向についての中央側部分１５ＡＣにおいて単位光屈折部２６Ａが占める占有率よりも低くなるよう配置する。【選択図】図６