Vehicle lighting device with a laser radiation source
View Patent ↗A vehicle lighting device that includes a laser radiation source, wherein a controlled reflective MEMS scanning mirror is situated in the path of laser radiation from the laser radiation source, wherein in the path of radiation reflected by the controlled reflective MEMS scanning mirror is located an imaging optical element and further an output optics, wherein the laser radiation source and the MEMS are connected to a power supply and control device. The laser radiation source is formed by an RGB laser radiation source with output white light and the imaging optical element is formed by a screen which is adapted to convert a narrow beam of laser white light directed at the screen surface from the RGB laser source by means of the controlled MEMS reflective scanning mirror at each point of the screen surface to a point source of uniform white light on the screen surface, wherein the uniform white light from this point source on the screen surface has a spherical wavefront of white light propagation and has the same wavelength as the white light directed by the controlled MEMS reflective scanning mirror onto the screen, whereby the output optics is arranged in the direction of travel of the white light with the spherical wavefront from the point source on the screen surface.
1. A vehicle lighting device comprising a laser radiation source, wherein a controlled reflective MEMS scanning mirror is situated in the path of laser radiation from the laser radiation source, wherein in the path of radiation reflected by the controlled reflective MEMS scanning mirror is located an imaging optical element and further an output optics, wherein the laser radiation source and the MEMS are connected to a power supply and control device, wherein laser radiation source is formed by an RGB laser radiation source with output white light and the imaging optical element is formed by a screen which is adapted to convert a narrow beam of laser white light directed at the screen surface from the RGB laser source by means of the controlled MEMS reflective scanning mirror at each point of the screen surface to a point source of uniform white light on the screen surface, wherein the uniform white light from this point source on the screen surface has a spherical wavefront of white light propagation and has the same wavelength as the white light directed by the controlled MEMS reflective scanning mirror onto the screen, whereby the output optics is arranged in the direction of travel of the white light with the spherical wavefront from the point source on the screen surface.
2. The vehicle lighting device according to claim 1 , wherein the RGB laser radiation source comprises an assembly of mutually separated R, G, B laser sub-sources of radiation, wherein each of these laser sub-sources of radiation is connected to the power supply and control device and is coupled to an RGB laser beam combiner, whereby behind the light output of the white laser light, the MEMS is arranged.
3. The vehicle lighting device according to claim 1 , wherein the screen is formed by a light-transmitting optical element for white laser light.
4. The vehicle lighting device according to claim 1 , wherein the screen is formed by a light-reflecting optical element for white laser light.
5. The vehicle lighting device according to claim 1 , wherein the output optics of the vehicle lighting device is adapted to direct the output white light relative to the axis of illumination out of the vehicle lighting device in the form of white light output beams with a profile of output white light intensity.
6. The vehicle lighting device according to claim 1 , wherein the power supply and control device is provided with software for controlling the MEMS for scanning the screen surface by reflecting white light from the controlled reflective scanning mirror to form a desired shape, position and area of the white laser light pattern on the screen.