Light-emitting diodes can also be divided into ordinary monochrome light-emitting diodes, high-brightness light-emitting diodes, ultra-high brightness light-emitting diodes, color-changing light-emitting diodes, flashing light-emitting diodes, voltage-controlled light-emitting diodes, infrared light-emitting diodes and negative resistance light-emitting diodes. There are two control modes of LEDs: constant current and constant voltage. There are various dimming methods, such as analog dimming and PWM dimming. Most LEDs use constant current control, which can keep the LED current stable and is not easy to be affected. The change of VF can prolong the service life of LED lamps.

Monochromatic light-emitting diodes Ordinary monochromatic light-emitting diodes Ordinary monochromatic light-emitting diodes have the advantages of small size, low operating voltage, low operating current, uniform and stable light emission, fast response speed, long life, etc., and can be driven by various DC, AC, pulse and other power sources. light up. It belongs to a current-controlled semiconductor device, and needs to be connected in series with a suitable current-limiting resistor.

Blue Light Emitting Diode (LED) The emitting color of ordinary monochromatic light emitting diodes is related to the wavelength of light emitted, which in turn depends on the semiconductor material used to manufacture the light emitting diode. The wavelength of red light-emitting diodes is generally 650-700nm, the wavelength of amber light-emitting diodes is generally 630-650nm, the wavelength of orange light-emitting diodes is generally about 610-630nm, the wavelength of yellow light-emitting diodes is generally about 585nm, and the wavelength of green light-emitting diodes is generally about 585nm. Generally 555 ~ 570nm. High-brightness monochromatic light-emitting diodes High-brightness monochromatic light-emitting diodes and ultra-high-brightness monochromatic light-emitting diodes use different semiconductor materials from ordinary monochromatic light-emitting diodes, so the luminous intensity is also different. Usually, high-brightness monochromatic light-emitting diodes use materials such as gallium aluminum arsenide (GaAlAs), ultra-high-brightness monochromatic light-emitting diodes use materials such as gallium indium arsenide phosphide (GaAsInP), and ordinary monochromatic light-emitting diodes use gallium phosphide (GaP) ) or gallium arsenide phosphide (GaAsP) and other materials.