Driving circuit of light emitting diode

Abstract

The invention provides a driving circuit of a light emitting diode. The driving circuit comprises a chip, a bridge rectifier, a first diode, a second diode and a first capacitor. The light emitting diode comprises an anode and a cathode, and the cathode of the light emitting diode is grounded. The chip is provided with a first input pin, a second input pin and an output pin, and the output pin iscoupled to the anode of the light emitting diode through a resistor. The bridge rectifier is bridged to the AC voltage source and has a ground terminal and a current output terminal, and the current output terminal is connected to the first input pin of the chip. The cathode of the first diode is connected to the second input pin of the chip. The cathode of the second diode is connected to the anode of the first diode, and the anode of the second transistor is grounded. The cathode end of the first capacitor is connected to the anode of the first diode, and the anode end of the first capacitoris connected to the current output end of the bridge rectifier.

Description

technical field [0001] The invention relates to a driving circuit of a light-emitting diode, in particular to a driving circuit of a light-emitting diode capable of reducing flicker. Background technique [0002] Generally speaking, in order to reduce the consumption of energy, the process of transmitting the mains power from the power plant to the user end will be transmitted in the form of alternating current. The mains power in Taiwan is 60Hz alternating current. When the backlight of the LED screen uses the mains power as the power supply At this time, the human eye will receive a flickering visual perception due to the flickering of the backlight, resulting in the flicker phenomenon. Contents of the invention [0003] In order to reduce the flicker phenomenon produced by the LED light source, which is easily perceived by human eyes, it is necessary to invent a light-emitting diode driving circuit capable of reducing the flicker. [0004] In an embodiment of the drivi...

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, in order to reduce the consumption of energy, the process of transmitting the mains power from the power plant to the user end will be transmitted in the form of alternating current. The mains power in Taiwan is 60Hz alternating current. When the backlight of the LED screen uses the mains power as the power supply At this time, the human eye will receive a flickering visual perception due to the flickering of the backlight, resulting in the phenomenon of flicker (Flicker)

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