LED lamp
First Claim
1. A light-emitting diode (LED) lamp, comprising:
- one or more LEDs;
a rectifier configured to receive an input voltage and provide rectified input voltage;
a first comparator configured to compare the rectified input voltage with a reference voltage and generate a sensed voltage, said sensed voltage being in a first state while the input voltage is provided and in a second state while the input voltage is not provided due to phase angle switching of the input voltage;
a dimming factor circuit configured to receive the sensed voltage and generate a control signal indicative of the sensed voltage; and
an LED driver configured to receive the input voltage and provide regulated current to said one or more LEDs, the LED driver configured to adjust the regulated current to said one or more LEDs based on the control signal to adjust output light intensity of said one or more LEDs.
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Accused Products
Abstract
An LED lamp is provided in which the output light intensity of the LEDs in the LED lamp is adjusted based on the input voltage to the LED lamp. The LED lamp comprises one or more LEDs, and an LED driver configured to receive an input voltage and provide regulated current to said one or more LEDs, where the LED driver is configured to adjust the regulated current to said one or more LEDs according to the input voltage to adjust the output light intensity of said one or more LEDs. The LED lamp can be a direct replacement of conventional incandescent lamps in typical wiring configurations found in residential and commercial building lighting applications that use conventional dimmer switches that carry out dimming by changing the input voltage to the LED lamp.
63 Citations
11 Claims
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1. A light-emitting diode (LED) lamp, comprising:
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one or more LEDs; a rectifier configured to receive an input voltage and provide rectified input voltage; a first comparator configured to compare the rectified input voltage with a reference voltage and generate a sensed voltage, said sensed voltage being in a first state while the input voltage is provided and in a second state while the input voltage is not provided due to phase angle switching of the input voltage; a dimming factor circuit configured to receive the sensed voltage and generate a control signal indicative of the sensed voltage; and an LED driver configured to receive the input voltage and provide regulated current to said one or more LEDs, the LED driver configured to adjust the regulated current to said one or more LEDs based on the control signal to adjust output light intensity of said one or more LEDs. - View Dependent Claims (2, 3, 4, 5)
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6. A method of adjusting output light intensity of one or more LEDs of an LED lamp, the method comprising:
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rectifying an input voltage to the LED lamp; comparing the rectified input voltage with a reference voltage to generate a sensed voltage, said sensed voltage being in a first state while the input voltage is provided and in a second state while the input voltage is not provided due to phase angle switching of the input voltage; generating a control signal indicative of the sensed voltage; and adjusting regulated current to said one or more LEDs based on the control signal to adjust the output light intensity of said one or more LEDs. - View Dependent Claims (7, 8, 9, 10)
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11. A lamp device, comprising:
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one or more light-emitting means for emitting light according to current flowing through said light-emitting means; and rectifier means for receiving an input voltage and providing rectified input voltage; comparator means for comparing the rectified input voltage with a reference voltage and generating a sensed voltage, said sensed voltage being in a first state while the input voltage is provided and in a second state while the input voltage is not provided due to phase angle switching of the input voltage; dimming control means for receiving the sensed voltage and generating a control signal indicative of the sensed voltage; and driver means for receiving the input voltage and providing regulated current to said one or more light-emitting means, the driver means configured to adjust the regulated current to said one or more light-emitting means based upon the control signal to adjust output light intensity of said one or more light-emitting means.
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Specification