2011年12月6日星期二

LED classification


LED classification [copy link]
1. Divided by LED light colorsDivided by LED light color, can be divided into red, orange, green (and yellow sub-standard green and pure green), blue, etc. In addition, some light-emitting diodes contain two or three colors of chips.According to a light emitting diode doped or not doped at the scattering agent, colored or colorless, the various colors of light-emitting diodes can be divided into colored and transparent, colorless transparent, colored and colorless scattering four types of scattering. Scattering of light-emitting diodes and do light up in use.2. By LED features a smooth sub-By LED features a smooth sub-round lights, side lights, rectangular, LED panel, LED side lights, side pipes, surface mount using a micro-tubes. Divided by diameter round light φ2mm, φ4.4mm, φ5mm, φ8mm, φ10mm and φ20mm etc. φ3mm abroad usually recorded as light-emitting diode T-1; the φ5mm's recorded as T-1 (3 / 4); the φ4.4mm's recorded as T-1 (1 / 4).By the half-value angle size can be estimated round luminous intensity distribution angle from the angular distribution of light intensity to be divided into three categories:(1) high directivity. Generally pointed epoxy encapsulated, or packaged with a metal reflector cavity, and does not increase the scattering agent. Half-value angle of 5 ° ~ 20 ° or less, with high directivity, can be used for partial lighting, or composition of the light detector linked to automatic detection system.(2) standard, usually used for light, its half-value angle of 20 ° ~ 45 °.(3) scattering model, which is the larger perspective of the light, half-value angle of 45 ° ~ 90 ° or greater, the larger the amount of scattering agent.3. Divided by the structure of light-emitting diodesDivided by the structure of light-emitting diodes are all epoxy, epoxy encapsulated base metal, ceramic and glass base epoxy encapsulated package structure.4. By light intensity and the current sub-By light intensity and current points of ordinary brightness of the LED (light intensity <10mcd); ultra-high brightness LED (light intensity> 100mcd); the luminous intensity between the 10 ~ 100mcd called high-brightness light-emitting diodes. General LED work to a few dozen mA current in mA, and low-current LED current in 2mA or less (normal LED brightness and the same).. More LED products visit: www.bgocled.com

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