Title:
LIGHTING SYSTEM, ILLUMINATION SYSTEM, AND LIGHTING FIXTURE
Document Type and Number:
Japanese Patent JP2021121146
Kind Code:
A
Abstract:
To provide a lighting system, an illumination system, and a lighting fixture capable of suppressing output oscillation and widening an output adjustment range.SOLUTION: A lighting system 1 comprises a converter circuit 2, a resonator switching circuit 4, and a control circuit 3. The converter circuit 2 is a resonant converter. The resonator switching circuit 4 uses a resonant path of a resonant circuit 22 which does not include an LED unit 8 as a self-resonant path, and switches between a first resonant state in which no self-resonant path is formed and a second resonance state in which the self-resonant path is formed. When adjusting an optical output within a first range, the control circuit 3 maintains the first resonance state over an ON period when switching elements Q1 and Q2 are turned on, and performs first control to change a switching frequency of the switching elements Q1 and Q2. When adjusting the light output within a second range in which the light output becomes larger than the first range, the control circuit 3 performs second control including the second resonance state in the ON period.SELECTED DRAWING: Figure 2
Inventors:
KIDO SHOJIRO
MOTOMURA MASASHI
TSURUOKA SHUNSUKE
MOTOMURA MASASHI
TSURUOKA SHUNSUKE
Application Number:
JP2020013887A
Publication Date:
August 19, 2021
Filing Date:
January 30, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CORP
International Classes:
H02M3/28; H02M3/155; H05B45/00
Attorney, Agent or Firm:
Patent business corporation Hokuto patent office