Title:
照明用電源装置
Document Type and Number:
Japanese Patent JP6970941
Kind Code:
B2
Abstract:
To provide a lighting power supply that does not emit light at the time of fading out.SOLUTION: A lighting power supply includes a control circuit 50 that detects the phase of an AC power subjected to phase control and generates a dimming signal that indicates the dimming level of a light source 10, and a power conversion circuit 20 that converts the AC power into a DC power corresponding to the dimming level indicated by the dimming signal, and supplies the power to the light source 10. The control circuit 50 has a predetermined delay time in the generation of the dimming signal, and in the fade-out control, the dimming signal is adjusted such that the dimming level reaches a dimming lower limit value before the light source 10 due to the decrease in the AC power is turned off.SELECTED DRAWING: Figure 4
Inventors:
Ryuhei Hayashi
Kazuhiro Kumada
Shinichi Murakami
Kazuhiro Kumada
Shinichi Murakami
Application Number:
JP2018034302A
Publication Date:
November 24, 2021
Filing Date:
February 28, 2018
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
H05B45/31
Domestic Patent References:
| JP2016162499A | ||||
| JP2013030415A |
Attorney, Agent or Firm:
Maeda patent office
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