The invention relates to an illumination device (51, 52, 53) for a motor vehicle headlight, which illumination device comprises: an illumination means (100) wherein the light beams thereof can be collimated by at least one lens system (200); a polarising beam splitter (300), which divides the collimated light beams into a first and a second linearly polarised beam path (310, 320); a first means for polarisation rotation (400) which is configured to rotate the polarisation direction of the second beam path (320), such that the second beam path (320) has the polarisation direction of the first beam path (310); a reflective means (350) which is configured to deflect the first beam path (310); a single second means for polarisation rotation (600), having at least one segment which can be placed in an active and an inactive state by means of electrical signals; a polarisation filter means (610) which is configured to transmit or block the light beams that have been rotated in terms of their polarisation by the second means for polarisation rotation (600); and at least one projection lens (700) which is provided to generate a light distribution or a partial light distribution of a lighting function in front of a motor vehicle.

A lighting device for a motor vehicle has a laser light source from the light of which light radiation is generated into the area around the motor vehicle during operation of the lighting device. In the lighting device, a plurality of optical channels is associated with the laser light source, and the light of the laser light source can be guided via each optical channel in order to generate a separate light spread associated with the optical channel from the guided light in the area around the motor vehicle. An optical element, which can be switched by a control device into different switching states, is provided between the laser light source and the plurality of optical channels. A different switching state is associated with each optical channel. In each respective switching state, light from the laser light source is fed only into the optical channel with which the respective switching state is associated, by means of the optical element.

To reliably perform light irradiation in a vehicular lamp system using a liquid crystal element even in a cryogenic environment. A control device for a vehicular lamp comprising a light source and a liquid crystal element where the liquid crystal element is set to a light-shielded state and the light source is set to a light-on state to heat the liquid crystal element by the light emitted from the light source when the temperature of the liquid crystal element is estimated to be lower than a predetermined value.

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.

An Optoelectronic apparatus, systems and methods to avoid the night-time dazzling of a driver's vision produced by the glare from the headlights of other vehicles. The disclosed embodiments include: (a) Intermittent lighting to illuminate the road, at least at times when glare should be avoided, as a substitute for the conventional continuous illumination produced by vehicle headlamps; (b) Synchronization of such intermittent illumination so that vehicles traveling in the same direction exhibit the same intermittent illumination phase and vehicles in opposite directions exhibit opposite intermittent illumination phases; (c) Protection of the driver(s) vision by preventing or attenuating at regular intervals of time the arrival of light into their eyes, including intermittent light pulses received from the already synchronized incoming vehicles; (d) Protection of the driver(s) vision by preventing or attenuating, at regular intervals of time, the arrival of reflected light, via rear-view mirrors, to their eyes, such protection including intermittent light pulses received from the already synchronized vehicles circulating in the same direction and behind said vehicle.

To increase the light utilization efficiency when selective light irradiation is performed using a liquid crystal element (a liquid crystal device). A lamp unit including: a light source; a reflective polarizing plate disposed at a position where light from the light source is incident; a reflecting mirror configured to reflect a reflected light generated by the reflective polarizing plate and re-enters the reflected light to the reflective polarizing plate; a liquid crystal device disposed on the light emitting surface side of the reflective polarizing plate; a polarizing plate disposed on the light emitting surface side of the liquid crystal device; and a lens disposed on the light emitting surface side of the polarizing plate.

A lighting tool for a vehicle configured to radiate light toward a side in front of a vehicle includes: a light radiation unit having a light source main body; a first optical system configured to condense light radiated from the light radiation unit; and a cover member disposed in front of the first optical system and configured to overlap at least a part of the first optical system when seen from the front, wherein an opening disposed on an optical axis of the first optical system is provided in the cover member.

A lighting tool for a vehicle configured to radiate light toward a side in front of a vehicle includes: a light radiation unit having a light source main body; a first optical system configured to condense light radiated from the light radiation unit; and a cover member disposed in front of the first optical system and configured to overlap at least a part of the first optical system when seen from the front, wherein an opening disposed on an optical axis of the first optical system is provided in the cover member.

The present invention relates to a vehicle headlight that ensures improving usage efficiency of light focusing of light emitted from a light source. A vehicle headlight (1) has a main reflecting mirror (10) having an elliptic main reflecting surface (10a) and a light source (8) positioned at a first focal point (F1) of the main reflecting surface (10) and disposed opposed to the main reflecting surface (10). The vehicle headlight includes a reflection type polarizing plate (13) disposed between the main reflecting mirror (10) and a second focal point (F2) of the main reflecting mirror (10), an auxiliary reflecting mirror (11) that is disposed opposed to the reflection type polarizing plate (13) and reflects reflected polarized light (B12) by the reflection type polarizing plate (13) again to focus the reflected polarized light at the second focal point (F2) of the main reflecting surface (10), and a quarter-wave plate (14) that is disposed between the reflection type polarizing plate (13) and the auxiliary reflecting mirror (11) and disposed between the auxiliary reflecting mirror (11) and the second focal point (F2) of the main reflecting mirror (10).

The present invention relates to a vehicle headlight that ensures improving usage efficiency of light focusing of light emitted from a light source. A vehicle headlight (1) has a main reflecting mirror (10) having an elliptic main reflecting surface (10a) and a light source (8) positioned at a first focal point (F1) of the main reflecting surface (10) and disposed opposed to the main reflecting surface (10). The vehicle headlight includes a reflection type polarizing plate (13) disposed between the main reflecting mirror (10) and a second focal point (F2) of the main reflecting mirror (10), an auxiliary reflecting mirror (11) that is disposed opposed to the reflection type polarizing plate (13) and reflects reflected polarized light (B12) by the reflection type polarizing plate (13) again to focus the reflected polarized light at the second focal point (F2) of the main reflecting surface (10), and a quarter-wave plate (14) that is disposed between the reflection type polarizing plate (13) and the auxiliary reflecting mirror (11) and disposed between the auxiliary reflecting mirror (11) and the second focal point (F2) of the main reflecting mirror (10).