PROBLEM TO BE SOLVED: To provide a light projection device for lightening a wide range in a uniform state, at low cost.SOLUTION: A light projection device 10 uses a protection plate 11 for protecting a display surface of a meter display 4 which is installed in a vehicle 1, as a light guide plate. A light emission control part 13 controls light emission of an IR light source part 12, guides the IR light from the IR light source part 12 with the protection plate 11 for radiating the light into inside of the vehicle 1. Therefore, inside of the vehicle 1 can be lightened over a wide range in a uniform state, in the light projection device 10.SELECTED DRAWING: Figure 1
【課題】広範囲かつ均一に照らす投光装置を、低コストで実現する。【解決手段】投光装置10は、車室内1に設置されたメータディスプレイ4の表示面を保護する保護板11を導光板として利用する。発光制御部13は、IR光源部12の発光を制御し、IR光源部12からのIR光を保護板11で導光させ車室内1へ照射する。これにより、車室内1を広範囲かつ均一に照らす投光装置10を、低コストで実現することができる。【選択図】図1
LIGHT PROJECTION DEVICE
投光装置
2017-01-19
Patent
Electronic Resource
Japanese
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