Determine the intrinsic characteristics of LED is ideal light source to replace the traditional light sources, it has a wide range of uses.
Small
LED is basically a very small chips are encapsulated in epoxy resin inside, so it is very small, very light.
Low power consumption
LED power consumption is very low, in general, LED's operating voltage is 2-3.6V. Operating current is 0.02-0.03A. That is to say: it does not exceed power consumption of 0.1W.
Long life
At the right current and voltage, LED service life of up to 10 million hours
High brightness, low-calorie
Environmental Protection
LED is made by a non-toxic materials, unlike fluorescent lamps containing mercury can cause pollution, while LED can also be recycled.
Durable
LED is completely encapsulated in epoxy resin inside it than light bulbs and fluorescent tubes are strong. Light and no loose parts of the body, these features make the LED can be said is not easy to damage.
LED Classification
1. Divided by the color LED light
Divided by the color LED light, can be divided into red, orange, green (and yellow segments, the standard green and pure green), blue and so on. In addition, some light-emitting diode contained in two or three colors of chips.
Light emitting diode based on doped or not doped at the scattering agent, colored or colorless, the various colors of light-emitting diodes can also be divided into colored transparent, colorless, transparent, colored and colorless scattering four types of scattering. Scattering of light-emitting diodes and used to make light.
2. LED features a glossy by sub-
LED features a glossy by cyclotomic lights, side lights, rectangular, surface light-emitting tube, side tubes, pipes and other surface mount micro. Divided by the diameter circular lights φ2mm, φ4.4mm, φ5mm, φ8mm, φ10mm and φ20mm and so on. Foreign φ3mm LEDs usually recorded as T-1; to φ5mm's recorded as T-1 (3 / 4); the φ4.4mm's recorded as T-1 (1 / 4).
Value by the semi-circle can be estimated angular size distribution of luminous intensity angle.
Angle from the luminous intensity distribution to be divided into three categories:
(1) high directivity. Generally pointed epoxy package, or package with a metal reflector cavity, without adding scattering agent. Half-value angle of 5 ° ~ 20 ° or less, with high directivity can be used as a local light source, or associated with the light detector to form an automatic detection system.
(2) standard. Normally used for light, its half-value angle of 20 ° ~ 45 °.
(3) scattering type. This is the perspective of the larger light, half-value angle of 45 ° ~ 90 ° or more, a large amount of scattering agents.
3. Divided by the structure of light-emitting diodes
Divided by the structure of light-emitting diodes have full epoxy encapsulation, epoxy encapsulation of metal base, ceramic base and glass epoxy encapsulated package structure.
4. By light intensity and operating current points
By light intensity and operating current divided ordinary brightness LED (light intensity 100mcd); the luminous intensity between the 10 ~ 100mcd called high-brightness light-emitting diodes. Normal operating current in the LED to a few dozen mA mA, and low current LED's operating current in the 2mA or less (normal LED brightness and the same).
Inaddition to the above classification, there are also classified according to the chip material and method of classification by function
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