Patent ID: 8624706
Filing Date: 2014-01-07
Classification: H05B,Y02B

Abstract:
1. A control circuit for controlling an indicator light, comprising: a power source supplying a voltage; a switch unit connected between the power source and the indicator light and configured for turning on or turning off the indicator light; a ground resistor connected between the power source and the ground via the indicator light and the switch unit; and a first adjusting unit connected in parallel with ground resistor, the first adjusting unit comprising a first adjusting resistor and a first control switch, the adjusting resistor connected between the indicator light and the ground via the first control switch, the first control switch being capable of connecting the first adjusting resistor with the ground resistor in parallel; wherein the switch unit comprises a first terminal, a second terminal, and a control terminal, the first terminal electrically connects to the second terminal when the control terminal receives a low voltage level and disconnects from the second terminal when the control terminal receives a high voltage level, the first terminal is connected to the power source, the second terminal is connected to the indicator light, the control terminal is connected to the power source via a first resistor; wherein the control circuit further comprises a PWM controller connecting to the control terminal for outputting square-wave pulse voltage to the control terminal.