To provide a planar lighting device capable of suppressing generation of Moire fringes.SOLUTION: A planar lighting device according to an embodiment includes a first lighting unit and a second lighting unit. Emission light of the first lighting unit is light distribution controlled by a first prism extending in a first extension direction. The first lighting unit emits light to an irradiated body in a first irradiation range. The second lighting unit is arranged at an opposite side of the irradiated body with respect to the first lighting unit. Emission light of the second lighting unit is light distribution controlled by a second prism extending in a second extension direction, passes through the first prism, and irradiates the irradiated body in a second irradiation range wider than the first irradiation range.SELECTED DRAWING: Figure 1

    【課題】モアレ縞の発生を抑制することができる面状照明装置を提供すること。【解決手段】実施形態に係る面状照明装置は、第1照明ユニットと、第2照明ユニットとを備える。第1照明ユニットは、第1の延在方向に延在する第1のプリズムによって配光制御された出射光が第1の照射範囲で被照射体へ出射される。第2照明ユニットは、第1照明ユニットに対して被照射体とは反対側に設けられ、第2の延在方向に延在する第2のプリズムによって配光制御された出射光が第1のプリズムを通過し、第1の照射範囲よりも広い第2の照射範囲で被照射体へ出射される。【選択図】図1


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    Title :

    PLANAR LIGHTING DEVICE


    Additional title:

    面状照明装置


    Contributors:

    Publication date :

    2019-12-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein



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