FLICKERING SUPPRESSOR SYSTEM FOR A DIMMABLE LED LIGHT BULB
First Claim
Patent Images
1. An apparatus comprising:
- a rectifier circuit comprising input terminals and output terminals, wherein the rectifier circuit is configured to rectify an a line voltage to generate a rectified voltage at its output terminals;
a resistor and switch coupled in series;
a switch control circuit directly coupled between the output terminals and configured to control the switch only as a function of the rectified voltage.
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Abstract
A flicker suppression system for a dimmable LED bulb. In one embodiment, the system includes a rectifier circuit having input terminals and output terminals. The rectifier circuit is configured to rectify a line voltage to generate a rectified voltage at its output terminals. A resistor and switch are also included and coupled in series. A switch control circuit is directly coupled between the output terminals and configured to control the switch only as a function of the rectified voltage.
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Citations
14 Claims
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1. An apparatus comprising:
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a rectifier circuit comprising input terminals and output terminals, wherein the rectifier circuit is configured to rectify an a line voltage to generate a rectified voltage at its output terminals; a resistor and switch coupled in series; a switch control circuit directly coupled between the output terminals and configured to control the switch only as a function of the rectified voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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closing a switch to couple a resistor in parallel with an LED light bulb and a switch control circuit; a TRIAC receiving gate current after the switch is closed, wherein the TRIAC is coupled in series with the parallel combination of the LED light bulb, the switch control circuit and the resistor; the resistor transmitting current in response to the TRIAC receiving gate current; after the resistor transmit current, opening the switch when a voltage at a node within the control circuit rises to a first voltage level; after opening the switch, closing the switch again when the voltage at the node lowers to a second voltage level. - View Dependent Claims (10, 11, 12)
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13. A method comprising:
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closing a switch to couple a resistor in parallel with an LED light bulb; a TRIAC receiving gate current after the switch is closed, wherein the TRIAC is coupled in series with the parallel combination of the LED light bulb and the resistor; the resistor transmitting current in response to the TRIAC receiving gate current; after the resistor transmit current, opening the switch so that the resistor cannot transmit current; wherein the switch is opened and closed independent of operation of the LED light bulb. - View Dependent Claims (14)
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Specification