Voltage Range Extender Mechanism
First Claim
1. An extended voltage range LED string driver comprising:
- an electronically controlled switch exhibiting a first port, a second port and a control port;
a source of predetermined voltage connected to said control port of said electronically controlled switch;
an LED string driver operatively connected to said first port of said electronically controlled switch; and
a means for connecting an LED string to said second port of said electronically controlled switch;
said electronically controlled switch being arranged to conduct between said first and said second port only when the voltage at said first port is within a predetermined range of said predetermined voltage.
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Accused Products
Abstract
An extended voltage range LED string driver comprising: an electronically controlled switch exhibiting a first port, a second port and a control port; a source of predetermined voltage connected to the control port of the electronically controlled switch; an LED string driver operatively connected to the first port of the electronically controlled switch; and a means for connecting an LED string to the second port of the electronically controlled switch; the electronically controlled switch being arranged to conduct between the first and the second port only when the voltage at the first port is within a predetermined range of said predetermined voltage.
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Citations
24 Claims
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1. An extended voltage range LED string driver comprising:
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an electronically controlled switch exhibiting a first port, a second port and a control port; a source of predetermined voltage connected to said control port of said electronically controlled switch; an LED string driver operatively connected to said first port of said electronically controlled switch; and a means for connecting an LED string to said second port of said electronically controlled switch; said electronically controlled switch being arranged to conduct between said first and said second port only when the voltage at said first port is within a predetermined range of said predetermined voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of extending the range of a LED string driver, said method comprising:
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providing an electronically controlled switch exhibiting a control port, a first port and a second port; setting the control port of said electronically controlled switch to a predetermined voltage; providing an LED string driver operatively connected to the first port of said electronically controlled switch; and conducting between said first port and the second port of said provided electronically controlled switch only when the voltage at said first port is within a predetermined range of said predetermined voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification