ILLUMINATION DEVICE AND LED DIMMING CIRCUIT THEREOF
First Claim
1. A light-emitting diode (LED) dimming circuit, comprising:
- a power converting module for receiving a mains supply and generating a driving voltage to drive a LED;
a sensing unit for converting a driving current flowing through the LED to a sensing voltage signal; and
a dimming module, comprising;
an input interface for receiving a dimming control signal inputted from external;
a dimming signal generator for outputting a first feedback signal based on the sensing voltage signal and the dimming control signal, andan isolating unit for receiving the first feedback signal and outputting a second feedback signal to the power converting module, thereby feedback-controlling the driving current.
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Accused Products
Abstract
An illumination device includes a light-emitting diode (LED) lamp and a LED dimming circuit. The LED dimming circuit includes a power converting module, a sensing unit and a dimming module. The power converting module is used to generate a driving voltage to drive the LED lamp. The sensing unit is used to generate a sensing voltage signal. The dimming module includes an input interface, a dimming signal generator and an isolating unit. The input interface is used to receive a dimming control signal. The dimming signal generator is used to output a first feedback signal based on the sensing voltage signal and the dimming control signal. The isolating unit is used to receive the first feedback signal and output a second feedback signal to the power converting module so as to control a driving current.
21 Citations
23 Claims
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1. A light-emitting diode (LED) dimming circuit, comprising:
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a power converting module for receiving a mains supply and generating a driving voltage to drive a LED; a sensing unit for converting a driving current flowing through the LED to a sensing voltage signal; and a dimming module, comprising; an input interface for receiving a dimming control signal inputted from external; a dimming signal generator for outputting a first feedback signal based on the sensing voltage signal and the dimming control signal, and an isolating unit for receiving the first feedback signal and outputting a second feedback signal to the power converting module, thereby feedback-controlling the driving current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 21, 22)
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8. An illumination device, comprising:
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a LED dimming circuit, comprising; a power converting module for receiving a mains supply and generating a driving voltage to drive a LED; a sensing unit for converting a driving current flowing through the LED to a sensing voltage signal; a dimming module, comprising; an input interface for receiving a dimming control signal inputted from external; a dimming signal generator for outputting a first feedback signal based on the sensing voltage signal and the dimming control signal, and an isolating unit for receiving the first feedback signal and outputting a second feedback signal to the power converting module, thereby feedback-controlling the driving current; and a LED lamp electrically connected to the power converting module of the LED dimming circuit. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A LED dimming circuit, comprising:
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a power converting module electrically connected to a LED; a sensing unit electrically connected to the LED; an amplifier with an input end and an output end, the input end of the amplifier electrically connected to the sensing unit; an input interface; a filter with an input end and an output end, the input end of the filter electrically connected to the input interface; a dimming signal generator with two input ends and an output end, and one of the two input ends of the dimming signal generator electrically connected to the output end of the amplifier, and the other of the two input ends of the dimming signal generator electrically connected to the output end of the filter; and an isolating unit with an input end and an output end, and the input end of the isolating unit electrically connected to the output end of the dimming signal generator, and the output end of the isolating unit electrically connected to the power converting module. - View Dependent Claims (15, 16, 17, 18)
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19. An illumination device, comprising:
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a LED dimming circuit, comprising; a power converting module electrically connected to a LED; a sensing unit electrically connected to the LED; an amplifier with an input end and an output end, the input end of the amplifier electrically connected to the sensing unit; an input interface, a filter with an input end and an output end, the input end of the filter electrically connected to the input interface; a dimming signal generator with two input ends and an output end, and one of the two input ends of the dimming signal generator electrically connected to the output end of the amplifier, and the other of the two input ends of the dimming signal generator electrically connected to the output end of the filter; and an isolating unit with an input end and an output end, and the input end of the isolating unit electrically connected to the output end of the dimming signal generator, and the output end of the isolating unit electrically connected to the power converting module; and a LED lamp electrically connected to the power converting module of the LED dimming circuit. - View Dependent Claims (20, 23)
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Specification