ILLUMINATION SYSTEM AND LUMINAIRE
First Claim
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 first 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.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
22 Citations
12 Claims
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1. An illumination system comprising:
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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 first 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification