What are the leds classification1

According to the luminous tube leds luminous color points

the luminous tube light color points, can be divided into red, orange, green, And yellow green, standards, green and pure green segment) , blue, etc. In addition, some

leds included in two or three kinds of color chip. According to the light emitting diode out light scattering or after adding the agent, colored or colorless, the above

color leds can also be divided into colored transparent, colorless, transparent, colored and colorless scattering four types. Scattering luminous diode and da

to be light. According to the luminous tube smooth feature points out leds

the luminous tube smooth feature points out round lights, side lights, rectangular, surface light-emitting tube, lateral tube, install with the micro tube surface, etc. Circular lamp according to the diameter of points

from 2 mm, 4. 4 mm, 5 mm, 8 mm phi phi is, from 10 mm and 20 mm, etc. 国外通常把φ3mm的发光二极管记作T- 1; The

phi T - 5 mm 1 ( 3/4) ； The phi is 4. By T - 4 mm 1 ( A quarter) 。 Can be estimated by half value Angle size round Angle of luminous intensity distribution.

3. From the Angle of luminous intensity distribution of LED lights has three types:

( 1) High directivity. Is commonly pointed epoxy encapsulation, or with metal reflective cavity encapsulation, and do not add scattering agent. Half value Angle of 5 ° ~ 20 ° or

smaller, has the very high directivity, can be used for local lighting light source, or with light detector combined to form an automatic test system.

　　（ 2) Standard. Usually used as indicator light, the half value Angle of 20 ° to 45 °.

　　（ 3) Scattering model. This is a bigger light Angle, half value Angle is 45 ° ~ 90 ° or greater, the amount of scattering agent is bigger. According to the structure of light emitting diode points LED lights

according to the structure of light emitting diode points with epoxy coating, metal base epoxy encapsulation, ceramic base epoxy encapsulation, glass encapsulation structure, etc. According to the luminous intensity and working current leds

the luminous intensity and working current are normal brightness LED ( Luminous intensity & lt; 10 ') ； High brightness LED ( Luminous intensity & gt; 100mcd）

； The luminous intensity between 10 to 100 MCD called high brightness leds. General LED working current in a dozen mA to dozens of mA, and low current LED

the working current of below 2 mA ( Brightness and ordinary light-emitting tube is the same) 。