LED illuminating source automobile headlamp

Abstract

The invention relates to a car headlight with LED illuminating source, which comprises an LED illuminating source (4), a reflecting mirror (5) and a convex lens (1), a second lens (3) fixedly connected with the reflecting mirror (5) is disposed straight ahead the LED illuminating source (4), the reflecting mirror (5) is an ellipsoid, the LED illuminating source is fixed in one focus of the ellipsoid, the other focus of the ellipsoid and a focus of the second lens (3) are in superposition, an LCD light valve (2) is arranged in front of the LED illuminating source, the LCD light valve (2) is mounted between the convex lens (1) and the second lens (3) and fixed on the reflecting mirror (5), the LCD light valve (2) is connected with the power source by a wire, and the reflecting mirror (5), the convex lens (1) and the second lens (3) form a reflecting and refracting system. The car headlight with LED illuminating source has convenient upper beam and low beam alternation, and the advantages of uniform luminance, strong penetration, less dispersed light and the like.

Description

technical field [0001] The invention relates to an LED light source automobile headlamp, which belongs to the field of automobile lamps. Background technique [0002] Traditional car headlights use incandescent lamps, halogen lamps, discharge lamps, etc. as light sources. When they are lit, the temperature in the lamp cavity is very high, about 130 ° C ~ 160 ° C, so the low beam baffle is generally selected High temperature resistant metal material. The disadvantage of this kind of headlight is that the light source is bulky, it is not convenient for the layout and design of various equipment, and the power consumption is relatively large. The LED light source has low calorific value, no heat radiation, cold light source, and the LED components are small in size, which is more convenient for the layout and design of various equipment. The LCD light valve is not resistant to high temperature, and the maximum working temperature is about 70°C. If a metal material is used as...

AI Technical Summary

Problems solved by technology

If a metal material is used as the baffle, two systems of low beam and high beam are generally required. If the high and low beam are required to be in the same system, a motor must be used to mechanically rotate the baffle, which requires a relatively large space for the lamp cavity, and The shock resistance of the mechanical system of the motor rotation cannot be guaranteed. In addition, the metal baffle will also generate electromagnetic interference.

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