LED light emitting diode classificationon December 13th, 2011 at 2:34 AM
According to the light-emitting diode light scattering agent with or without addition, colored or colorless, the LEDs of various colors can be divided into colored transparent, colorless and transparent, colorless colored scattering and scattering of four types. Scattering type light emitting diode and to do an indicator lamp.
By 1 LEDs color
According to the LEDs color points, can be divided into red, orange, green ( yellow, green and subdivision standard and pure green ), blue light. In addition, some light emitting diode contains two or three color chips. According to the light-emitting diode light scattering agent with or without addition, colored or colorless, the LEDs of various colors can be divided into colored transparent, colorless and transparent, colorless colored scattering and scattering of four types. Scattering type light emitting diode and to do an indicator lamp.
In 2 LED light bulbs characteristic
According to the luminous tube surface characteristic round lights, side lights, rectangular, surface light emitting tube, the lateral pipe, surface mount miniature tubes etc..
Round lamp according to the diameter is divided into 2mm diameter, diameter of 4.4mm, 5mm diameter, diameter of 8mm, 10mm and 20mm diameter and diameter. Foreign usually for 3mm tobacco led written as T-1; the diameter of 5mm written T-1 ( 3 / 4); the diameter of 4.4mm written T-1 ( 1 / 4). Half value angle can be estimated by circular angle distribution of luminous intensity. From the angle of luminous intensity distribution map to have three class:
( 1) high directivity. Generally pointed epoxy encapsulation, or with a metal reflection cavity package, and without scattering agent. Half value angle of 5 DEG to 20 DEG or smaller, with high directivity, can make local lighting light source and light detector, or combined to compose the automatic detection system.
( 2) the standard type. Usually an indicator lamp, the half value angle of 20 DEG to 45 deg.
( 3) scattering type. This is the view larger indicating lamp, half value angle of 45 degrees to 90 degrees or greater, the large amount of scattering agent.
3 according to the light-emitting diode structure
According to the structure of light-emitting diode with the epoxy resin, metal base ceramic base epoxy encapsulation, epoxy and glass packaging structure.
4 according to the luminous intensity and working current
According to the luminous intensity and working current general brightness of the LED ( light emitting intensity < 10mcd ); high brightness LED ( light emitting intensity > 100mcd ); the luminescence intensity in 10 ~ 100mcd of high brightness led.
General LED working current in 10 mA to dozens of mA, while a low current LED working current in 2mA ( brightness and ordinary luminous tube of the same ).
In addition to the above classification method, and according to the chip material classification and classified by function method.