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Found results for
 patents
1.
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Smart converter for lighting control device, smart converter having improved THD and EMI, and lighting control device including same
| Application Number |
17925280 |
| Grant Number |
12160942 |
| Status |
In Force |
| Filing Date |
2021-11-17 |
| First Publication Date |
2023-08-31 |
| Grant Date |
2024-12-03 |
| Owner |
LISANTECH CO., LTD (Republic of Korea)
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| Inventor |
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Abstract
A converter for a lighting control device for controlling lighting comprises: a filter circuit configured to remove a noise component included in an input power; a full-wave rectifier circuit configured to generate a full-wave rectified power from an input power from which a noise component has been removed; a power conversion circuit configured to generate a driving power of lighting by using a full-wave rectified power; and a dimming control circuit configured to output a dimming control signal for adjusting a driving power to the power conversion circuit, according to a dimming level indicating brightness of lighting, wherein the dimming control circuit outputs a first control signal to the full-wave rectifier circuit when the dimming level is less than a first reference value, and in response to the first control signal, the combined capacitance of the full-wave rectifier circuit is reduced, so that total harmonic distortion (THD) is reduced.
IPC Classes ?
- H05B 45/36 - Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
- H05B 45/14 - Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
- H05B 45/37 - Converter circuits
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2.
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SMART CONVERTER FOR LIGHTING CONTROL DEVICE, SMART CONVERTER HAVING IMPROVED THD AND EMI, AND LIGHTING CONTROL DEVICE INCLUDING SAME
| Application Number |
KR2021016922 |
| Publication Number |
2022/108339 |
| Status |
In Force |
| Filing Date |
2021-11-17 |
| Publication Date |
2022-05-27 |
| Owner |
LISANTECH CO., LTD (Republic of Korea)
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| Inventor |
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Abstract
A converter for a lighting control device for controlling lighting according to embodiments of the present invention comprises: a filter circuit configured to remove a noise component included in an input power; a full-wave rectifier circuit configured to generate a full-wave rectified power from an input power from which a noise component has been removed; a power conversion circuit configured to generate a driving power of lighting by using a full-wave rectified power; and a dimming control circuit configured to output a dimming control signal for adjusting a driving power to the power conversion circuit, according to a dimming level indicating brightness of lighting, wherein the dimming control circuit outputs a first control signal to the full-wave rectifier circuit when the dimming level is less than a first reference value, and in response to the first control signal, the combined capacitance of the full-wave rectifier circuit is reduced, so that total harmonic distortion (THD) of the converter for the lighting control device is reduced.
IPC Classes ?
- H05B 45/36 - Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
- H05B 45/14 - Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
- H05B 45/37 - Converter circuits
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