发明名称 |
Illumination system and luminaire |
摘要 |
An illumination system includes: a first light-emitting element column in which one or more first light-emitting elements are serially connected; a second light-emitting element column connected in parallel with the first light-emitting element column, and in which one or more second light-emitting elements are serially connected; a constant current supply that supplies constant current to a light source unit including the first and second light-emitting element columns; a resistor that is connected in series with the first light-emitting element column, and detects magnitude of current flowing through at least the first light-emitting element column; a bypass circuit that passes, to the resistor, at least part of current flowing through the second light-emitting element column, when a predetermined condition is satisfied; and a current adjuster circuit that adjusts the magnitude of the current flowing through the first light-emitting element column, according to the magnitude of the current detected by the resistor. |
申请公布号 |
US9585223(B2) |
申请公布日期 |
2017.02.28 |
申请号 |
US201614988212 |
申请日期 |
2016.01.05 |
申请人 |
Panasonic Intellectual Property Management Co., Ltd. |
发明人 |
Seki Keisuke;Hiramatsu Akinori;Kido Hiroshi |
分类号 |
H05B33/08 |
主分类号 |
H05B33/08 |
代理机构 |
Renner, Otto, Boisselle & Sklar, LLP |
代理人 |
Renner, Otto, Boisselle & Sklar, LLP |
主权项 |
1. An illumination system comprising:
a first light-emitting element column including one of a single first light-emitting element or a plurality of first light-emitting elements connected in series; a second light-emitting element column connected in parallel with the first light-emitting element column, and including one of a single second light-emitting element or a plurality of second light-emitting elements connected in series; a constant current supply that supplies a constant current to a light source unit that includes the first light-emitting element column and the second light-emitting element column; a first detector circuit that is connected in series with the first light-emitting element column, and detects a magnitude of current flowing through at least the first light-emitting element column; a current adjuster circuit that adjusts the magnitude of the current flowing through the first light-emitting element column, according to the magnitude of the current detected by the first detector circuit; and a bypass circuit that passes, to one of the first detector circuit or the current adjuster circuit, at least part of current flowing through the second light-emitting element column, when a predetermined condition is satisfied. |
地址 |
Osaka JP |