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 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 the first light-emitting element column; 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 first detector circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
An illumination system includes: 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 the first light-emitting element column and the second light-emitting element column which are connected in parallel; a resistor that is connected in series with the first light-emitting element column, and detects a magnitude of current flowing through the first light-emitting element column; 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.
-
Citations
27 Claims
-
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 the first light-emitting element column; 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 first detector circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A lighting apparatus that supplies current to a plurality of light-emitting element columns, the lighting apparatus comprising:
-
a common terminal; a plurality of branch terminals; a constant current supply that supplies current to the plurality of light-emitting element columns such that a sum of currents flowing from the common terminal to the plurality of branch terminals is constant, when the plurality of light-emitting element columns are connected between the common terminal and a respective different one of the plurality of branch terminals; and a current adjustor circuit that adjusts a magnitude of current flowing from the common terminal to at least one of the plurality of branch terminals. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
Specification