Recent development and application of LED technology challenges

Light-emitting diode ( 领导) Is a kind of semiconductor ( Diode) In positive bias voltage/current source conditions, can make a specific color ( Wavelength) Visible light, its brightness depends on the parameters and the parameters of the power supply itself. General electric (ge) is the first LED the researchers about invented in 1962, is a kind of low-power devices that produce a low light red light, but the price is very high.

in 1968, LED price bottleneck is broken, Monsanto and hewlett-packard company started using highly cost-effective gallium arsenide phosphide ( GaAsP) Mass production red leds. The red leds initially used to replace incandescent lamp and the neon light, such as on/off/standby indicator lights, then quickly used in digital displays.

after similar to the rapid development of the TV set as expected, the LED can provide wide range of colors, a single device has a variety of color, brightness and power consumption level, and can provide a variety of unique encapsulation type. There are numerous devices from infrared ( IR) Until the ultraviolet ( UV) A series of invisible light.

the rapid development of the device type usually leads to a revolutionary application. Visible light LED is no longer just used as indicator light, is used to replace almost all lighting ( Practical and decorative) And logo application of incandescent lamp and fluorescent lamp, because these leds with low power consumption/low fever and obvious features of a longer life expectancy and the long-term and short-term lower the cost of running condition. Little pony

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