Light emitting device (LED) driving apparatus and lighting device including the same
First Claim
1. A light emitting diode (LED) driving apparatus comprising:
- a power supply circuit configured to supply driving power to a plurality of LED arrays;
a controller integrated circuit (IC) including a plurality of internal switches respectively connected to output terminals of the plurality of LED arrays, and configured to control a path of current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches based on a magnitude of the driving power; and
a current control circuit connected to an output terminal of a first LED array among the plurality of LED arrays and configured to adjust current flowing to the first LED array,wherein while the driving power is supplied, the first LED array is constantly driven.
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Accused Products
Abstract
A light emitting diode (LED) driving apparatus includes a power supply circuit configured to supply driving power to a plurality of LED arrays, a controller integrated circuit (IC) including a plurality of internal switches respectively connected to the plurality of LED arrays and configured to control a path of current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches based on a magnitude of the driving power, and a current control circuit connected to an output terminal of a first LED array among the plurality of LED arrays and configured to adjust current flowing in the first LED array. The first LED array is constantly operated while the driving power is being supplied.
50 Citations
20 Claims
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1. A light emitting diode (LED) driving apparatus comprising:
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a power supply circuit configured to supply driving power to a plurality of LED arrays; a controller integrated circuit (IC) including a plurality of internal switches respectively connected to output terminals of the plurality of LED arrays, and configured to control a path of current flowing in the plurality of LED arrays by adjusting operations of the plurality of internal switches based on a magnitude of the driving power; and a current control circuit connected to an output terminal of a first LED array among the plurality of LED arrays and configured to adjust current flowing to the first LED array, wherein while the driving power is supplied, the first LED array is constantly driven. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lighting device comprising:
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a light source including first to nth light emitting diode (LED) arrays connected in series; a power supply circuit having a rectifying circuit configured to rectify alternating current (AC) power and a compensation circuit configured to supply predetermined compensation power to the first LED array when an output voltage from the rectifying circuit is smaller than a minimum voltage required for driving the first LED array; a controller integrated circuit (IC) including first to nth internal switches respectively connected to output terminals of the first to nth LED arrays, and configured to control a path of current flowing in the first to nth LED array by adjusting operations of the first to nth internal switches based on a magnitude of a voltage supplied by the power supply circuit to the light source; and a current control circuit connected to an output terminal of the first LED array and configured to draw a portion of current flowing in the first LED array when the predetermined compensation power is supplied to the first LED array. - View Dependent Claims (12, 13, 14, 15)
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16. A light emitting diode (LED) driving apparatus comprising:
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a power supply circuit configured to supply driving power to a first LED array and a second LED array; a controller integrated circuit (IC) including a first internal switch and a second internal switch and configured to control operations of the first internal switch and second internal switch based on a magnitude of the driving power; and a current control circuit connected to an output terminal of the first LED array and an output terminal of the second LED array and configured to adjust current flowing to the first LED array, wherein while the driving power is supplied, the first LED array is constantly driven. - View Dependent Claims (17, 18, 19, 20)
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Specification