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US 8,896,317 B2Granted
Lighting unit with compensation for output frequency, and method for determining output frequency
AssigneeNXP B.V.
InventorsRadu Surdeanu, Viet Nguyen Hoang, Benoit Bataillou, Pascal Bancken, David Van Steenwinckel
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Abstract
A method of determining the dominant output wavelength of an LED, includes determining an electrical characteristic of the LED which is dependent on the voltage-capacitance characteristics, and analyzing the characteristic to determine the dominant output wavelength.
Claims19
A method of determining the dominant output wavelength of an LED, comprising:
- determining an electrical characteristic of the LED which is dependent on the voltage-capacitance characteristics;
- and
- analysing the electrical characteristic to determine the dominant output wavelength.
A method of controlling an LED, comprising:
- determining the dominant output wavelength of the LED using a method comprising,
- determining an electrical characteristic of the LED which is dependent on the voltage-capacitance characteristics;
- and
- analysing the electrical characteristic to determine the dominant output wavelength;
- and
- controlling the LED in dependence on the determined dominant output wavelength.
3 more elements
A method of controlling a plurality of different coloured LEDs, comprising:
- determining the dominant output wavelength for each of the LEDs using a method comprising,
- determining an electrical characteristic of the LED which is dependent on the voltage-capacitance characteristics;
- and
- analysing the electrical characteristic to determine the dominant output wavelength;
- and
- controlling the LEDs in dependence on the determined dominant output wavelengths, thereby obtaining a desired combined colour output.
3 more elements
An arrangement for determining the dominant output wavelength of an LED, comprising:
- means, including control circuitry, for determining an electrical characteristic of the LED which is dependent on the voltage-capacitance characteristics;
- and
- means, communicatively and electrically coupled with the control circuitry, for analysing the electrical characteristic to determine the dominant output wavelength.
Dependencies are inferred from the claim text.