Method and apparatus for driving a light emitting diode
First Claim
1. An apparatus comprising circuitry having an input and an output, said circuitry responding to application to said input of an alternating current input signal by producing at said output an output signal driving an electronic light generating element, said circuitry including a regulating section that includes a magnetic switch, wherein said regulating section regulates a current flowing through said output such that said regulated current is varied based on changes in a magnetic state of said magnetic switch in response to a pulse train being applied to said magnetic switch.
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Abstract
An apparatus includes circuitry that responds to application to its input of an alternating current input signal by producing at its output an output signal suitable for driving an electronic light generating element. The circuitry includes a regulating section that has a magnetic switch and that causes a current flowing through the output to be maintained substantially at a selected value. A different aspect relates to a method for operating circuitry having an input, an output and a magnetic switch. The method includes causing the circuitry to respond to application to its input of an alternating current input signal by producing at its output an output signal suitable for driving an electronic light generating element, where the magnetic switch is used in regulating a current flowing through the output so as to maintain the current substantially at a selected value.
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Citations
20 Claims
- 1. An apparatus comprising circuitry having an input and an output, said circuitry responding to application to said input of an alternating current input signal by producing at said output an output signal driving an electronic light generating element, said circuitry including a regulating section that includes a magnetic switch, wherein said regulating section regulates a current flowing through said output such that said regulated current is varied based on changes in a magnetic state of said magnetic switch in response to a pulse train being applied to said magnetic switch.
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12. A method of operating circuitry having an input, an output and a magnetic switch, comprising;
responding to application to said input of an alternating current input signal by producing at said output an output signal driving an electronic light generating element, including regulating a current flowing through said output in a manner that includes use of said magnetic switch, by varying said regulated current based on changes in a magnetic state of said magnetic switch in response to a pulse train being applied to said magnetic switch. - View Dependent Claims (13, 14, 15, 16, 17, 18, 20)
Specification