To provide a vehicular road surface drawing light projection unit which can clearly draw a plurality of desired patterns at a predetermined position on a road surface at low cost with a simple structure, without requiring a power source and a drive part.SOLUTION: A drawing optical system is constituted by : a plurality of LEDs 10, 11, 12; a light shielding member 30 having light transmission parts 30a, 30b, 30c for narrowing emission light from each of the plurality of LEDs 10, 11, 12 and generating an image pattern of a predetermined shape and size; and a projection lens 40 for drawing a drawing pattern by projecting the emission light which has been emitted by vertically and horizontally inverting each image pattern and refracting it in the light collecting direction onto the road surface. The position of the light shielding member 30 is set in such a manner that the contour of the image pattern of each of the light transmission parts 30a, 30b, 30c forms a figure substantially at the contour of the drawing pattern.SELECTED DRAWING: Figure 2
【課題】動力源及び駆動部を必要とすることなく安価で簡便な構成により、路面上の所定の位置に複数の所望のパターンを鮮明に描画することができる車両用路面描画投光ユニットを提供することにある。【解決手段】複数のLED10、11、12と、複数のLED10、11、12の夫々からの出射光を絞って所定形状寸法の像画パターンを生成する光透過部30a、30b、30cを有する遮光部材30と、各像画パターンを上下左右反転して集光方向に屈折させて出射した出射光を、路面上に投影して描画パターンを描画する投影レンズ40と、により描画光学系を構成し、遮光部材30の位置を、光透過部30a、30b、30cの夫々の像画パターンの輪郭が描画パターンの略輪郭に結像するように設定した。【選択図】図2
VEHICULAR ROAD SURFACE DRAWING LIGHT PROJECTION UNIT
車両用路面描画投光ユニット
2020-07-02
Patent
Electronic Resource
Japanese
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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