A vehicle headlamp unit for irradiating light in front of the vehicle with a high contrast ratio and is capable of sufficiently cutting off the illumination light is provided. The unit includes a light source, a parallel optical system that produces parallel light, a polarizing beam splitter that splits light emitted from the parallel optical system into two polarized beams having polarization directions orthogonal to each other, a reflection-type liquid crystal element capable of switching between a first state where the light emitted from a first surface of the polarizing beam splitter is reflected without rotation of the polarization direction, and a second state where the light is reflected with rotation of the polarization direction, in each predetermined section, and a projection optical system that projects light, reflected by the reflection-type liquid crystal element and passed through the polarizing beam splitter once again, in front of the vehicle.
Vehicle headlamp unit and vehicle headlamp system
08.01.2019
Patent
Elektronische Ressource
Englisch
| IPC: | F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen / 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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