PROBLEM TO BE SOLVED: To provide a planer lighting device which can inhibit luminance unevenness.SOLUTION: A planer lighting device according to an embodiment includes a light guide plate, a light source and an absorption member. In the light guide plate, a through hole is formed between a light incident end surface into which light is introduced and an opposite end surface which is an end surface at the opposite side of the light incident end surface. The light source is provided at the light incident end surface side and emits the light to the opposite end surface side. The absorption member is provided in at least a part at the side of a peripheral surface of the through hole, which faces the light source, and absorbs the light.SELECTED DRAWING: Figure 1

    【課題】輝度ムラを抑えることができる面状照明装置を提供すること。【解決手段】実施形態の面状照明装置は、導光板と、光源と、吸収部材とを備える。導光板は、光が導入される入光端面と入光端面の反対側の端面である反対端面との間に貫通孔が形成される。光源は、入光端面側に設けられ、反対端面側へ向けて光を発する。吸収部材は、貫通孔の周面のうち光源と対向する側の少なくとも一部に設けられ、光を吸収する。【選択図】図1


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    Title :

    PLANER LIGHTING DEVICE


    Additional title:

    面状照明装置


    Contributors:

    Publication date :

    2018-05-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS




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