Three minutes to read about the “high-tech” LED light

I: What are LEDs?
Light source after incandescent, fluorescent lamps, to the development process of LED, LED has a low energy consumption, high brightness, mercury-free non-toxic, long life, instant start, plasticity and other advantages, has replaced the traditional light source, in this article does not do too much on the traditional light source to review.

The so-called LED is Light Emitting Diode abbreviation, that is, light-emitting diode, is a semiconductor light-emitting materials, when the two ends plus forward voltage, semiconductor carriers in the compound caused by photon emission and produce light. LED can directly emit red, yellow, blue, green, blue, orange, purple, white light.

II: The structure of LED light beads
1, a LED light source by the bracket, chip, glue, phosphor, wire composition
2, LED bracket is generally made of copper (there are also iron, aluminum and ceramic, etc.), because copper conductivity is very good, it will have a lead inside, to connect the electrodes inside the led beads.
3, high-end light source wire are used 0.999 pure gold wire, diameter more: 0.8mil, 1.0mil. some pursuit of low-cost manufacturers with copper alloy doped wire to do.
4, phosphor is to play a role in adjusting the colour temperature of the light source.
5, the common high-end chips are: the United States CREE (Core), Bridgelux (Bridgelux); Japan Nichia (Nichia), Germany Osram Osram; Taiwan: Epistar.

III: Common LED light sources
The market is often circulated LED models are 2835, 5050, 5730, 5630, 3030, 4040, 7030 and integrated COB and high-power beads, to distinguish the light source model is named after the length and width of the SMD SMD, for example, the following figure for the 2835 SMD, that is, the width of 2.8 long 3.5, such light sources are commonly used in LED bulbs, downlights, spotlights, ceiling lights, light strips These light sources are commonly used in LED bulbs, downlights, spotlights, ceiling lights, strip lights, tubes and so on. Each power more than about 0.1W-1W.
High power beads are commonly used for 1W, 2W, 3W each, commonly used in spotlights and outdoor lighting.
COB integrated light sources are commonly used in high-power lamps such as spotlights, track lights and floodlights, each with a power of 5-50W.