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US 2006/0076901 A1Published application
Strip light with constant current
OwnerYuan Lininventor
Life of this patent
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Abstract
A strip light is disclosed. The light comprises an illuminating unit including a plurality of illuminators (e.g., LEDs) directly and electrically coupled in series, and a constant current stabilization unit with temperature compensating capability for supplying a constant current to each illuminator. A number of embodiments of the constant current stabilization unit are made possible. The invention further has advantages of energy saving, even brightness of the illuminators, less heat generation, and durability.
Claims20
A strip light device, comprising:
- a constant current stabilization unit having a first , a second, a third and a ground terminals;
- a first current regulator as an output being electrically connected to the third terminal and the ground terminal of the constant current stabilization unit
- a second current regulator being electrically connected to the first terminal of the constant current stabilization unit and a positive terminal of a power source;
- and
- an illuminating unit including a plurality of illuminators directly and electrically coupled in series which is electrically connected to the second terminal of the constant current stabilization unit and the positive terminal of a power source;
- the constant current stabilization unit further comprising:
- a first transistor as a switch means having a first resistor electrically coupled in parallel to the second current regulator and the illuminating unit and being turned on in response to current feeding from the first resistor;
- a second transistor as a controller electrically coupled in parallel to the first transistor and the current regulator, the second transistor being adapted to control a turning on of the first transistor in response to feeding current from the second current regulator for maintaining a constant current;
- a third transistor for compensating temperature and including a plurality of second resistors and a first capacitor and being electrically coupled in parallel to the first transistor;
- and
- a voltage stabilizer including a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a plurality of third resistors, and a second capacitor wherein a turning on or not of the first transistor is responsible for comparing an input voltage with a predetermined voltage and amplifying an output voltage, and the second capacitor is charged by one of the third resistors;
- wherein the constant current stabilization unit is operative to supply a constant current to each of the illuminators, the first capacitor is discharged for turning on the third transistor in response to rising temperature, and the second capacitor is discharged to decrease current flowing through the illuminating unit.
9 more elements
A strip light device, comprising:
- a constant current stabilization unit having a first, a second, a third and a ground terminals;
- a first current regulator as an output being electrically connected to the third terminal and the ground terminal of the constant current stabilization unit
- a second current regulator being electrically connected to the first terminal and a second terminal of the constant current stabilization unit;
- and
- an illuminating unit including a plurality of illuminators directly and electrically coupled in series which is electrically connected to the second terminal of the constant current stabilization unit and the positive terminal of a power source;
- the constant current stabilization unit further comprising:
- a first transistor as a switch means having a first resistor electrically coupled in parallel to the second current regulator and the illuminating unit and being turned on in response to current feeding from the first resistor;
- a second transistor as a controller electrically coupled in parallel to the first transistor and the current regulator, the second transistor being adapted to control a turning on of the first transistor in response to feeding current from the second current regulator for maintaining a constant current;
- a third transistor for compensating temperature and including a plurality of second resistors and a first capacitor and being electrically coupled in parallel to the first transistor;
- and
- a voltage stabilizer including a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a plurality of third resistors, and a second capacitor wherein a turning on or not of the first transistor is responsible for comparing an input voltage with a predetermined voltage and amplifying an output voltage, and the second capacitor is charged by one of the third resistors;
- wherein the constant current stabilization unit is operative to supply a constant current to each of the illuminators, the first capacitor is discharged for turning on the third transistor in response to rising temperature, and the second capacitor is discharged to decrease current flowing through the illuminating unit.
9 more elements
Dependencies are inferred from the claim text.