a. what’s the LED?
In certain semiconductor material PN knot,Which will theminority carrier of infusion and majority carrier compound ShihPa redundant Chi earnestly resentment badger of form acquit comeout?Hereby Pa electric energy direct conversion for lightenergy. . 。PN knot add anti Hsiang voltage,Minority carrierdifficult to infusion,Therefore No, aglow. 。This kind of availoneself of infusion style electricity to aglow principium make

the crystal diode of call led,Appellative LED

LED aglow color concerned in luminosity and fabricator LED material Ho craft,Currently widely used have Hung , green , Lan three plants. 。Based on LED operating tensions low ( littles less than 1.5-3V),Neng initiative aglow and has at all events brightness,Brightness and employable voltage ( or electric current ) accommodate,In itself and endure buffets , shocks resistances moves , ages long ( 10 Wan hour ),Forasmuch in man- size display device, Currently Shang free from more bring out mode and LED bring out mode is equal to.? Do Pa red Ho green LED put together as a pixel the bring out of fabricator screen call Shuang base color screen or pseudo-color screen;Pa Hung , green , Lan three plants LED Kuan put together as a the bring out of pixel screens calls triply primitives colors screens or full
colors screens. 。Studioes inner LED the pixel of sizes general are 2-10 centimeters,Often adopt Pa severalplant Neng accrue different base color LED Kuan core capsulation Cheng an organic whole,Outdoor LED the pixel of sizes manys for 12-26 centimeters,Each pixel consist of several Ke all kinds monochromatic LED,Used to the completed product of say pixel tube or pixel mold piece.?

Do if LED bring out screen feel like display frame elephant?

Hen call for component the each of pixel LED aglow brightness Tu has got to Neng accommodate,Its accommodative delicate extent the same bring out that the gray scale of. Gray scale Yueh Kao,Apparent the eikon of just Yueh fine and smooth,Color also Yueh abundance,The display control of corresponding system also Yueh complex. 。In the present technic horizontal down,256 grades the eikons of draies levels,Color transition had completely soft,Image restoration effect compare desirable. Do Data display,LED light source compare filament lamp section electricity 87%, compare fluorescent lamp section electricity 50%,And ages compare Pai flaming lamps long 20~30 diameters , compare fluorescent lamps long 10 diameters. 。LED lights sources because endowed with conserve energys , environmental protections , long lives , An Chuan , responds fasts , cubage littles , colors abundance , cans accuse and so on seriess peculiars advantages,known as section electricity fall of the best of accomplish approach.

b. Manufacture standard

c. How to use LED?
How to use LED

Static electricity,lead forming must be done before soldering.the leads should be bent at a point at least 5mm from the epoxy resin of the LEDs.Ensure that no unsuitable stress is applied to the resin with the help of radio pliers or equivalent.
Soldering The base of the epoxy resin should be at least 1.6mm above the soldering surface.Avoid any stress to the leads or epocy body during soldering.Avoid reposition after soldering.For manual soldering:the soldering conditions are 260 C for less than 3 seconds,under 30 W.For wave soldering:not more than 5 seconds at 260 C.If solder one line of LEDs on a P.C.B with a soldering iron,do not solder bth the leads of the LEDs at the same time.Use a metal tween zers to hold to lead during soldering;it will facilitate the teat dissipation.

Cleaning

Do not used unspecified chemicals to clean the LED,or they may do herm to the LED surface.When cleaning is needed, please use alcohol or freon TE,and the cleaning time should be less than 30 seconds at normal temperature. Resistor In order to maintain the good performance of LEDs, appropriate resistors are needed to be connected in series with LEDs.