PROBLEM TO BE SOLVED: To provide a vehicular headlight unit showing a high bright and dark light contrast ratio and capable of sufficiently cutting light.SOLUTION: This invention relates to a vehicular headlight unit (vehicular lamp unit 100) for performing a selective light irradiation in regard to a front region of own vehicle. The vehicular headlight unit comprises a light source 1a; a parallel optical system 2 for changing light from the light source into a parallel light; a polarization beam splitter 3a for separating light ejected from the parallel optical system into two polarized beams with their polarization directions being crossed at a right angle to each other; a reflection type liquid crystal element 4a capable of changing over a first state in which the polarization direction of beam emitted from the first plane of the polarization beam splitter is reflected without turning its direction and a second state in which the polarization direction is turned to reflect it for every specified segments; and a projection optical system 5a in which beam reflected from a reflection type liquid crystal element and again passed through the polarization beam splitter is projected in front of the own vehicle.SELECTED DRAWING: Figure 1

    【課題】明暗光のコントラスト比が高く、照明のカットを十分に行える車両用前照灯ユニット等を提供する。【解決手段】自車両の前方に対して選択的な光照射を行うための車両用前照灯ユニット(車両用ランプユニット100)であって、光源1aと、光源からの光を平行光にする平行光学系2と、平行光学系から出射する光を互いの偏光方向が直交する2つの偏光に分離する偏光ビームスプリッター3aと、偏光ビームスプリッターの第1面から出射する光の偏光方向を回転させずに反射する第1状態と偏光方向を回転させて反射する第2状態を所定区分ごとに切り替え可能な反射型液晶素子4aと、反射型液晶素子から反射されて再び偏光ビームスプリッターを通過した光を自車両の前方に投射する投射光学系5aを備える。【選択図】図1


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    Title :

    VEHICULAR HEADLIGHT UNIT AND VEHICULAR HEADLIGHT SYSTEM


    Additional title:

    車両用前照灯ユニット、車両用前照灯システム


    Contributors:

    Publication date :

    2016-06-23


    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 / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen






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