The principle of operation is as follows: passing through the crystal strobe effect electric curren

LED - a semiconductor device that emits light when current passes. By the early 90's strobe effect automotive use their limited display strobe effect - is too low was light output. However, in 1992, Hella has equipped BMW Cabrio center stop lamp based svitlodiodov, and now they're being used in the rear lights as size and brake lights. Light-triggered strobe effect 0.2 seconds faster traditional bulbs use less energy (for stop lamps - 10 W to 21 W) and differ almost unlimited service life.
Outside LED device seems very simple: two electrodes (anode strobe effect and cathode), body-lens, cast in resin epoksidnoj, and the main design strobe effect element - crystal. strobe effect Everything else, not counting gold wire (see. Fig.), Made of common and cheap materials.
The principle of operation is as follows: passing through the crystal strobe effect electric current excites radiation (light) is strictly defined range, lens focuses its light output in a given geometry. Therefore, the efficiency of LEDs higher than traditional light sources. For example, incandescent lamps are characterized by luminous broadband radiation 8-15 lumens per watt of electrical power, but after going through the stained glass light output decreases almost an order of magnitude. strobe effect LEDs emit 8 lm / W, no color filters and lenses do not require. strobe effect Another advantage is their - high mechanical strength. Of course, they are destroyed, but small strokes better hold traditional bulbs. For example, svetlodyody American company "Hewlett Packard" is not afraid of falling from a height of 75 cm, and the contact findings can be suspended load in one kilogram. But in order to replace the bulbs with LEDs in the headlights of head light must overcome a number of obstacles. First, even the best LEDs on efficiency while compared with only halogen bulbs (light output - about 25 lumens per watt). However, they are expensive and require special cooling system - it's the same semiconductor devices as computers and processors. But developers argue that by 2008 LEDs light output has reached 70 lm / W (xenon present in - 90 lm / W). So the first production LED headlamps may appear in 2010. Meanwhile semiconductors instruct the secondary functions - such as constant "daylight", strobe effect as did Hella, placing each headlight Audi A8 W12 five svitlodiodov.
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