Lighting apparatus
AssigneeSilicon Works Co., Ltd.
InventorsYong Geun Kim, Dong Il Kim, Sang Young Lee, Ki Chul An
Life of this patent
Estimating the term…
Abstract
The present invention relates to a lighting apparatus which stably performs dimming control on a lamp implemented with light emitting diodes (LEDs) or the like. The lighting apparatus may improve power efficiency by driving power supplied to a lamp in a current regulation method, perform constant current control such that the lamp maintains constant brightness, perform dimming control for controlling the brightness of the lamp, commonly supply the power provided to the lamp to peripheral circuit modules, and perform constant voltage control such that a driving voltage supplied as power is maintained at a predetermined level or more.
Claims28
A lighting apparatus comprising:
- a power conversion circuit configured to convert a rectified voltage into a driving voltage using a transformer;
- a lamp configured to receive the driving voltage;
- a dimming control circuit configured to provide a dimming control signal corresponding to an external control signal and operate using an operating voltage obtained by converting the level of the driving voltage;
- a driving control circuit configured to control the power conversion circuit in response to a result obtained by monitoring the power conversion and the dimming control signal;
- and
- a driving voltage control circuit configured to control the dimming control signal for controlling the driving voltage so that the operating voltage is maintained at a predetermined level or more.
A lighting apparatus comprising:
- a power conversion circuit configured to output a driving voltage for driving a lamp using a rectified voltage obtained by rectifying an AC voltage;
- a dimming control circuit configured to operate using an operating voltage obtained by converting the level of the driving voltage and provide a dimming control signal corresponding to an external control signal;
- a driving control circuit configured to perform current regulation in response to a result obtained by monitoring the operation of the power conversion circuit and the dimming control signal, and control the power conversion of the power conversion circuit;
- and
- a driving voltage control circuit configured to control the dimming control signal for controlling the driving voltage so that the operating voltage is maintained at a predetermined level or more.
(Currently amended A lighting apparatus that converts a rectified voltage into a driving voltage using a transformer and provides the driving voltage to a lamp, comprising:
- a secondary-side circuit provided at a secondary side of the transformer, and configured to operate using a operating voltage obtained by converting the level of the driving voltage receive the driving voltage for operation and provide a dimming control signal corresponding to an external control signal;
- and
- a primary-side circuit provided at a primary side of the transformer, and configured to control the operation of the transformer in response to at least the dimming control signal,
- wherein the secondary-side circuit corrects the dimming control signal in response to when the driving voltage drops to a preset reference voltage or less so that the operating voltage is maintained at a predetermined level or more, and the driving voltage is maintained at the level of the reference voltage or more in a state in which the lamp is turned off by the dimming control signal.
Dependencies are inferred from the claim text.