Power apparatus for LED lighting
AssigneeLG Innotek Co., Ltd.
InventorsDong Soo Lee, Joo Hoon Kim, Seok Yoon
Life of this patent
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Abstract
The present invention relates to a power apparatus for an LED lighting, and more specifically, to an LED lighting comprising: a filter for blocking noise from an inputted AC power; a rectifier, which is connected to the filter, for converting AC power into DC power; a power factor compensation circuit for controlling the power factor of power received from the rectifier; a central control circuit for controlling the operation of the power apparatus for the LED lighting; and an LED control circuit for controlling power inputted through the power factor compensation circuit and providing same to an LED, wherein the power factor compensation circuit includes a bypass element connected between an input end and an output end.
Claims23
A power apparatus for an LED light, comprising:
- a filter which blocks noise of input AC power;
- a rectifier which is connected to the filter and converts the AC power into DC power;
- a power factor correction circuit which controls a power factor of power received from the rectifier;
- a central control circuit which controls an operation of the power apparatus for an LED light;
- and
- an LED control circuit which adjusts power received via the power factor correction circuit and provides the adjusted power to an LED;
- a voltage measurement circuit which senses a voltage of the LED and transmits the sensed voltage to the central control circuit,
- wherein the voltage measurement circuit comprises:
- a first sensing unit which senses a voltage at a positive pole of the LED;
- a second sensing unit which senses a voltage at a negative pole of the LED;
- and
- a comparison unit which compares a result of the voltage sensing of the first sensing unit with a result of the voltage sensing of the second sensing unit,
- wherein the power factor correction circuit comprises a bypass element connected between an input stage and an output stage.
A power apparatus for an LED light, comprising:
- a filter which blocks noise of input AC power;
- a rectifier which is connected to the filter and converts the AC power into DC power;
- a power factor correction circuit which controls a power factor of power received from the rectifier;
- a central control circuit which controls an operation of the power apparatus for an LED light;
- an LED control circuit which adjusts power received via the power factor correction circuit and provides the adjusted power to an LED;
- and
- a current conversion circuit which senses an electric current of the LED and transmits the sensed current to the LED control circuit,
- a voltage measurement circuit which senses a voltage of the LED and transmits the sensed voltage to the central control circuit,
- wherein the voltage measurement circuit comprises:
- a first sensing unit which senses a voltage at a positive pole of the LED:
- a second sensing unit which senses a voltage at a negative pole of the LED;
- and
- a comparison unit which compares a result of the voltage sensing of the first sensing unit with a result of the voltage sensing of the second sensing unit,
- wherein the current conversion circuit comprises:
- a signal input unit which receives a pulse width modulation signal from the central control circuit;
- a switching element which operates in response to the pulse width modulation signal received from the signal input unit;
- and
- a current control unit which is connected to the switching element, processes an electric current received from the LED in response to an operation of the switching element, and transmits the processed current to the LED control circuit.
A power apparatus for an LED light, comprising:
- a filter which blocks noise of input AC power;
- a rectifier which is connected to the filter and converts the AC power into DC power;
- a power factor correction circuit which controls a power factor of power received from the rectifier;
- a central control circuit which controls an operation of the power apparatus for an LED light;
- an LED control circuit which adjusts power received via the power factor correction circuit and provides the adjusted power to an LED;
- and
- a voltage measurement circuit which senses a voltage of the LED and transmits the sensed voltage to the central control circuit,
- wherein the voltage measurement circuit comprises:
- a first sensing unit which senses a voltage at a positive pole of the LED;
- a second sensing unit which senses a voltage at a negative pole of the LED;
- and
- a comparison unit which compares a result of the voltage sensing of the first sensing unit with a result of the voltage sensing of the second sensing unit.
Dependencies are inferred from the claim text.