LED lamp is an electroluminescent semiconductor material chip, solidified to the bracket with silver glue or white glue, and then connected to the chip and circuit board with silver or gold wire, sealed around with epoxy resin to protect the internal core wire, and finally installed the shell, so the LED lamp has good seismic performance.
origin
In the 1960s, scientific and technological workers used the principle of semiconductor PN junction luminescence to develop LED light-emitting diodes. At that time, the LED developed, the material used is GaASP, its luminous color is red. After nearly 30 years of development, we are very familiar with the LED, has been able to emit red, orange, yellow, green, blue and other colors of light. However, the white light LED required for lighting was only developed after 2000, here to introduce the reader to the white LED for lighting.
LED light
New green light source
LED uses cold light source, small glare, no radiation, no harmful substances in use.
Long life
LED is a solid cold light source, epoxy resin package, anti-vibration, there is no loose part in the lamp body, there is no filament light easy to burn, thermal deposition, light decay and other shortcomings, the service life of up to 60,000 to 100,000 hours, is more than 10 times the service life of the traditional light source.
Multiple transform
LED light source can use the principle of red, green and blue three primary colors, under the control of computer technology to make the three colors with 256 gray levels and arbitrary mixing, you can produce 256X256X256 (that is, 16777216) colors, forming a combination of different light colors.
shortcoming
* Heat dissipation problem, if the heat dissipation is not good, it will greatly shorten the life.
* The power saving of low-end LED lights is still lower than that of energy-saving lamps (cold cathode tube, CCFL).
* High initial purchase cost.
* Because the LED light source is very directional, the lamp design needs to consider the special optical characteristics of LED.
Apply
Initially, LED was used as an indicator light source for instrumentation, and later LED of various light colors was widely used in traffic lights and large-area displays, resulting in good economic and social benefits. In addition, LED lights in outdoor red, green, blue full-color display, key link miniature torches and other fields have been applied.
foreground
LED light source has the advantages of using low-voltage power supply, low energy consumption, strong applicability, high stability, short response time, no pollution to the environment, multi-color luminescence, etc., although the price is more expensive than the existing lighting equipment, it is still considered that it will inevitably replace the existing lighting devices.
