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US 2018/0295686 A1Published application
Lighting apparatus
AssigneeLumens Co., Ltd.
InventorsTai-Hyun KIM, Jong-il KIM, Hyun-Pyo HONG, Jun-Hyung LIM, Tae-Kwan LEE, Young-Jun LEE
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Abstract
Disclosed herein is a lighting apparatus capable of uniformly maintaining power consumed by light emitting units even in the case in which various voltages are applied, and increasing power efficiency while minimizing a heating problem by adjusting a reference voltage applied to a connection structure of the light emitting units and a distribution switch according to magnitude of the applied voltage.
Claims18
1-14. (canceled)
A lighting apparatus comprising:
- a power supply unit generating alternating current (AC) power;
- a light emitting unit connected in series with the power supply unit and including a first light emitting unit and a second light emitting unit that each have at least one light emitting diode element;
- a voltage detecting unit connected in series with the power supply unit and measuring a voltage value input from the power supply unit;
- and
- a reference voltage controlling unit selectively controlling a first distribution switch unit and a second distribution switch unit which are separately connected to the first light emitting unit and the second light emitting unit, according to the voltage value measured by the voltage detecting unit;
- wherein the reference voltage controlling unit supplies a first distribution switch reference voltage to the first distribution switch unit and the second distribution switch unit when the voltage value measured by the voltage detecting unit is smaller than a switching control reference voltage,
- wherein the reference voltage controlling unit supplies a first distribution switch reference voltage to the first distribution switch unit, and supplies a second distribution switch reference voltage having a value greater than the first distribution switch reference voltage to the second distribution switch unit, when the voltage value measured by the voltage detecting unit is greater than a switching control reference voltage.
4 more elements
Dependencies are inferred from the claim text.