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The white light LED drive circuit

2014-11-06 21:19  
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The white light LED drive circuit
Compared to the EL backlight illuminating apparatus, the white light LED has a longer lifespan and its power consumption is lower. Most of the manufacturers confess that it has a working lifespan of 1 million hours under the standard condition, its efficiency of converting electricity into light is 80%. Since 1993 when the blue light LED whose wavelength is 470nm, the LEDs whose output is from ultraviolet light to yellow light are widely used. The wavelength of the white light LED is 430~700mm.