Vehicle headlight system
AssigneeStanley Electric Co., Ltd.
InventorTakashi Sugiyama
Life of this patent
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Abstract
To prevent a decrease in luminance of the flashed high-beam headlights caused by ambient temperature in a vehicle headlight system using a liquid crystal element. The vehicle headlight system for selectively irradiating light in front of an own vehicle includes: a light source; a liquid crystal element for forming an image using light from the light source where the liquid crystal element is a normally closed liquid crystal element having a relatively low transmittance when no voltage is applied thereto; a driving circuit for driving the liquid crystal element; and a control part that determines whether or not the light source is in a light-off state and controls the driving circuit to set the liquid crystal element to a transmission state when the light source is in the light-off state.
Claims4
A vehicle headlight system for selectively irradiating light in front of an own vehicle comprising:
- a light source;
- a liquid crystal element for forming an image using light from the light source where the liquid crystal element is a normally closed liquid crystal element having a relatively low transmittance or reflectance when no voltage is applied thereto;
- a driving circuit for driving the liquid crystal element;
- and
- a control part that determines whether or not the light source is in a light-off state and controls the driving circuit to set the liquid crystal element to either a transmission state or a reflection state when the light source is in the light-off state.
Dependencies are inferred from the claim text.