Circuit for driving and monitoring an LED
First Claim
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1. A circuit for controlling a current through an LED, comprising:
- a regulator for providing said current to said LED;
an LED voltage monitoring circuit for monitoring a voltage drop across said LED and providing a voltage reading signal based on said voltage drop; and
a data converter logic circuit coupled with said regulator and said LED voltage monitoring circuit, wherein said data converter logic circuit is operable to control said regulator to adjust said current based on said signal.
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Abstract
Described herein is technology for, among other things, a circuit for controlling a current through an LED. The novel circuit includes a regulator for providing the current to the LED, an LED voltage monitoring circuit for monitoring a voltage drop across the LED and for providing a voltage reading signal based on the voltage drop. The novel circuit further includes a data converter logic circuit coupled with the regulator and the LED voltage monitoring circuit. The data converter logic circuit is operable to control the regulator to adjust the current based on the signal.
46 Citations
20 Claims
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1. A circuit for controlling a current through an LED, comprising:
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a regulator for providing said current to said LED; an LED voltage monitoring circuit for monitoring a voltage drop across said LED and providing a voltage reading signal based on said voltage drop; and a data converter logic circuit coupled with said regulator and said LED voltage monitoring circuit, wherein said data converter logic circuit is operable to control said regulator to adjust said current based on said signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An integrated circuit for controlling a current through an LED, comprising:
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a driver circuit for providing said current to said LED; and an LED monitoring circuit for monitoring a voltage drop across said LED and providing a voltage reading signal based on said voltage drop; and a logic circuit coupled with said driver circuit and said LED monitoring circuit, wherein said logic circuit is operable to control said driver circuit to adjust said current based on said signal. - View Dependent Claims (8, 9)
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10. A method for controlling a current through an LED, comprising:
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generating said current for said LED; monitoring a voltage drop across said LED; adjusting said current based on said voltage drop. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification