DIMMABLE LIGHTING SYSTEM
First Claim
1. A lighting system for operation with a dimmer circuit comprising a triac connected to a load, the load comprising a driver circuit for supplying current to a light source comprising one or more LEDs, the current being determined at least in part by an adjusted setpoint value, the system further comprising a setpoint filter circuit for obtaining a dimmer setpoint value determined at least in part by a setting of the dimmer circuit, and for generating an adjusted setpoint value, wherein the sensitivity of the adjusted setpoint value to changes in the dimmer setpoint value is low at low values of the dimmer setpoint value.
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Accused Products
Abstract
A lighting system for operation with a dimmer circuit comprising a triac connected to a load. The load comprises a driver circuit for supplying current to a light source comprising one or more LEDs, the current being determined at least in part by an adjusted setpoint value. The system further comprises a setpoint filter circuit for obtaining a dimmer setpoint value determined at least in part by a setting of the dimmer circuit, and for generating an adjusted setpoint value. The sensitivity of the adjusted setpoint value to changes in the dimmer setpoint value is low at low values of the dimmer setpoint value.
85 Citations
50 Claims
- 1. A lighting system for operation with a dimmer circuit comprising a triac connected to a load, the load comprising a driver circuit for supplying current to a light source comprising one or more LEDs, the current being determined at least in part by an adjusted setpoint value, the system further comprising a setpoint filter circuit for obtaining a dimmer setpoint value determined at least in part by a setting of the dimmer circuit, and for generating an adjusted setpoint value, wherein the sensitivity of the adjusted setpoint value to changes in the dimmer setpoint value is low at low values of the dimmer setpoint value.
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22. A setpoint filter circuit for use in a lighting system comprising a triac dimmer circuit, a light source comprising one or more LEDs, and a driver circuit for supplying current to one or more LEDs, the current being determined at least in part by an adjusted setpoint value, the setpoint filter circuit comprising:
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an input circuit for obtaining a dimmer setpoint value determined at least in part by a setting of the dimmer circuit; and an adjustment circuit for generating an adjusted setpoint value, wherein the sensitivity of the adjusted setpoint value to changes in the dimmer setpoint value is low at low values of the dimmer setpoint value. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
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- 32. A lighting system for operation with a dimmer circuit comprising a triac, the system comprising a light source comprising one or more LEDs and a load comprising a dimmer triggering circuit for triggering the dimmer triac and a driver circuit for supplying a current to the one or more LEDs, wherein the current supplied by the driver circuit is determined at least in part by an dimmer setpoint value, and wherein the dimmer setpoint value is derived at least in part from a firing angle of the dimmer triac.
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50. A lighting system for operation with a dimmer circuit comprising a triac, the system comprising a light source comprising one or more LEDs and a load comprising a dimmer triggering circuit for triggering the dimmer triac and a driver circuit for supplying a current to the one or more LEDs, the driver circuit comprising a power factor correction circuit, wherein the current supplied by the driver circuit is determined at least in part by an dimmer setpoint value which is derived at least in part from a firing angle of the dimmer triac.
Specification