No assignee for patent application serial number 570466 has been made.
News editors obtained the following quote from the background information supplied by the inventors: "The present invention is directed toward a lighting device and, more specifically, to a headlight for a motor vehicle.
"Such a headlight is known from EP 1 357 332 A2. With lighting equipment for motor vehicles, there is a basic distinction between lights and headlights. Lights serve the purpose of indicating to other traffic participants the presence and/or behavior of a motor vehicle and/or intentions of its driver. Examples of lights are brake lights, indicator lights, and position lights.
"However, headlights serve the purpose of actively illuminating the driving path of a motor vehicle in such a way that the driver may notice obstacles early enough. The light distributions have to be rule-consistent to make sure that, for example, other traffic participants are not blinded. Examples of light distributions produced by headlights are low-beam and high-beam light distributions.
"The purpose and ability of a unit producing light distributions (be it signal light distributions or headlight distributions) is light function. With respect to a light distribution mainly functioning as a headlight, its main functions can be distinguished from other light functions that arc provided by the same lighting equipment when these, for example, also fulfill 'signal light' functions.
"With road motor vehicles produced in series, semiconductor-light sources are only used for headlight main functions since 2008 while they have been introduced for 'signal light' functions even earlier. One reason for this delay resulted from the higher light-energy demand for these main functions in comparison to 'signal' functions.
"To produce the high luminous flux necessary for the main functions, light-emitting diodes are used for semiconductor-light sources that are delivered pre-assembled on a carrier and produce comparatively high luminous fluxes with comparatively high electrical currents. While light-producing filaments from light bulbs or electric ares front gas-discharge lamps in use are getting very hot (within a range of 2.times.10.sup.3 degrees to 3.times.10.sup.3 degrees) and, thus, emit comparatively much heat along with the visible light, semiconductor-light sources are emitting their light at much lower temperatures (within a range of 1.times.10.sup.2 degrees to less than 2.times.10.sup.2 degrees). Semiconductor-light sources can be realized as a single emitter or also as an array of single emitters summarized to a composite structure.
"The electric energy being converted into heat during the use of the semiconductor-light source occurs within the chip of the semiconductor-light source and has to he discharged by cooling elements since, otherwise, the chip would be destroyed from overheating. Efficient cooling elements are large, heavy, and expensive, which is to be counted as a disadvantage in any case. For reasons of limited space, there is an interest in compact headlights. Heaviness is counterproductive in view of the desired weight reduction of motor vehicles, and higher costs are always disadvantageous.
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