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AssigneeSilicon Mitus, Inc.
InventorsDong-Hun Lee, Kyung-Goo Lee, Hong-Gyu Han, Jung-Won Kim, Dong-Hee Kim
Estimating the term…
An LED light emitting device and a method of driving the same are provided, and technology that can uniformly sustain the magnitude of a channel current flowing to a plurality of LED channels is disclosed. The LED light emitting device includes: a plurality of LED channels that are formed with a plurality of LED elements that are continuously connected in series; and a constant current source that controls each channel current flowing to the plurality of LED channels according to a predetermined channel reference current to be a predetermined setting channel current, wherein the constant current source includes a plurality of operating amplifiers that control the magnitude of each of the channel currents, and a feedback voltage generating according to a predetermined offset reference current is input to a second input terminal of an operating amplifier for an offset setting period that sets an offset voltage of the plurality of operating amplifiers, a reference voltage generating according to a channel reference current is input to a first input terminal of the operating amplifier, and an offset voltage of each of the plurality of operating amplifiers is set so that an actual channel current may be identical to a predetermined setting channel current.
A light emitting diode (LED) light emitting device comprising:
A method of driving a light emitting diode (LED) light emitting device comprising a plurality of LED channels that are formed with a plurality of LED elements that are continuously connected in series, a plurality of operating amplifiers that control each channel current flowing to the plurality of LED channels to be a predetermined setting channel current, a plurality of reference resistors that are connected to first input terminals of each of the plurality of operating amplifiers, and a plurality of detection resistors that are connected to second input terminals of each of the plurality of operating amplifiers, the method comprising:
A method of driving a light emitting diode (LED) light emitting device comprising a plurality of LED channels that are formed with a plurality of LED elements that are continuously connected in series, a plurality of operating amplifiers that control each channel current flowing to the plurality of LED channels to be a predetermined setting channel current, and a plurality of reference resistors, a plurality of detection resistors, and a plurality of setting resistors that are connected to first input terminals of each of the plurality of operating amplifiers, the method comprising:
Dependencies are inferred from the claim text.