LED gives

LED gives out light diode, is a kind of semi-conductor spare part of solid, it can directly chase an electricity conversion is light.The LED heart is a chip of semi-conductor, LED light chip of on carrying to attach on a support, a carry is an anode, another on carrying the cathode of linking the power, make the whole chip packed by the epoxy.The semi-conductor chip constitutes to°from three parts, a part is a semi-conductor, the empty cave predominates in it position, another a carry is a semi-conductor, is mainly an electronics here, in the center is usually 1-5 quantum Jings of periods.When the electric current passes to lead a line function at this chip of time,LED flood light electronics and empty the cave will be pushed vector son Jing and reunites with empty cave at the quantum electronics inside the Jing, then meeting with light the form of the son send out energy, this is the principle that the LED gives out light.And light of the wave-length is also a bare color, the material knotted by the formation P-N decides.

LED(Light Emitting Diode) gives out light diode, is a kind of semi-conductor spare part of solid, it can directly chase the electricity conversion as light.The LED heart is a chip of semi-conductor, chip of on carrying to attach on a support, LED spot lighta carry is an anode, another on carrying the cathode of linking the power, make the whole chip packed by the epoxy.The semi-conductor chip constitutes to°from two parts, a part is a semi-conductor and get empty cave to predominate in it position, another a carry is a semi-conductor, is mainly an electronics here.But these two kinds of semi-conductors at the time that conjunction got up, they formed a P-N knot.When the electric current passes to lead a line function at this chip of time, electronics the meeting is pushed toward the P area, the electronics reunites with empty cave in the P area,LED strip light then meeting with light the form of the son send out energy, this is the principle that the LED gives out light.And light of the wave-length is also a bare color, the material knotted by the formation P-N decides.

50 year ago people have already understood semi-conductor material to produce the basic knowledge of ray, the first company with the diode produce in 1960.LED is the diode(give out light diode) abbreviation of English light emitting, its basic structure is a piece of electricity to giving out light of semi-conductor material, place on a shelf with fuse, then on all sides seal completely with the epoxy,LED tube light also namely the solid packs, so can have protect internal Xin line of function, so the LED anti-vibration can be good.

The core part that gives out light diode is from p type semi-conductor and n type the semi-conductor constitute of chip, have a transition layer between n type semi-conductor and semi-conductor and be called p-n knot at the p type.The PN in some semi-conductor materials knot in, infusion of minority carry to flow son and majority to carry to flow sub- compound will surplus of energy with light of the form release and thus convert electric power directly for the light ability.The PN knot adds anti- to the electric voltage, LED Ceiling Lightthe minority carry to flow the son hard infusion, so don't give out light.This kind of makes use of to infuse into a type electricity to give out light the diode of principle creation call give out light diode, general name for LED.When it is just placed in toward the work appearance(namely the both ends pluses just to the electric voltage), electric current when the anode fly to cathode from LED the semi-conductor crystal send out from the purple outside arrive red outside the ray in different color, light of the strong or weak have something to do with electric current.

First LED useds to the designation light source of instrument gauge, afterwards various LED of light color shows to hold in the traffic sign light and the big area in got an extensive application, produced good economic efficiency and social efficiency.Take the red traffic sign light of 12 inches as an example, in the United States originally is adopted a longevity life, 140 tile incandescent lamps of low radiation were light sources,Educational Baby toys it produced 2000 flowed clear white light.Only lose 90% after red color filter, leaves 200 flow clear red light.But at lately in the light of design, the Lumileds company adopted 18 red LED light sources and included electric circuit loss at inside, totally consume to give or get an electric shock 14 tiles, can immediately produce same radiation.The car signal beacon is also LED the important realm of light source application.

For general illuminate but talk, people even need white light source.In 1998 LED of the white light development success.This kind of LED is GaN the chip and Yi aluminum garnet(YAG) seal to pack to together make into.The GaN chip delivers blue light(λ p=465 nms, Wd=30 nms), the heat sends out a yellow to only shoot after burning knot to make into of contain Ce 3+ YAG fluorescence powders is stired up by this blue light, the Feng is worth 550 nms.The blue light LED radicle slice installs a form glint the chamber is at the bowl in, overlay with the resin thin layer that mixs to have YAG, about 200-500 nms.LED radicle slice emanative blue light part drive fluorescence powder absorb, another a part blue only with Huang that fluorescence powder send out only hybrid, can get white light.Now, for InGaN|YAG white LED, pass change YAG the chemistry of the fluorescence powder constitute and regulate the thickness of fluorescence powder layer, can acquire each color white light of color 3500-10000 Ks.This kind of passes blue light LED get white light of method, construct in brief, cheap cost, technique mature degree Gao,Learn Mandarin therefore the usage is the most.