DC POWER SOURCE UNIT AND LED LAMP SYSTEM

• Main Authors: KUMAGAI MASATOSHI, TERASAKA HIROSHI, SASAI TOSHIHIKO, IWAI NAOKO, KAWANO HITOSHI, KAMATA MASAHIKO, ISHIKITA TORU
• Format: Patent
• Language: English; Korean
• Published: 10.04.2012
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION

PURPOSE: A DC power source device and an LED lamp system are provided to improve the efficiency of a load control circuit by suppressing a difference between an input voltage and an output voltage. CONSTITUTION: A DC power circuit(37) boosts a power voltage. A load control circuit(38) supplies a DC voltage made by dropping an output voltage of the DC power circuit to a load. A control circuit(39) controls the load control circuit according to a voltage or current of the load. The control circuit controls the DC power circuit to form an output voltage with a preset ratio of the voltage of the load. The control circuit controls the DC power circuit by increasing or decreasing the output voltage according to a preset threshold and the voltage of the load.