POWER SUPPLY CIRCUIT

• Main Authors: HIRATA SEIICHIRO, IWAI AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 02.02.2015
• 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

PROBLEM TO BE SOLVED: To provide a power supply circuit that, even in a case where one of a plurality of LED illumination lights is removed during energization, has no change in brightnesses of the remaining LED illumination light, and that prevents the life from being affected.SOLUTION: A power supply circuit comprises: a parallel circuit part 20 in which connectors 28X and 28Y attached and connected with a plurality of LED illumination lights 7X and 7Y are electrically connected in parallel; and a constant current supply circuit part 10 for supplying a specified current Ia to the parallel circuit part 20. The power supply circuit comprises detection control means 3 detecting the removal instantaneously when one of the plurality of LED illumination lights 7X and 7Y is removed from the connector 28X during energization, and performing current limitation of a specified current Ia to a specification current of the remaining LED illumination light 7Y. 【課題】複数のＬＥＤ照明灯の内、通電中に１本が取り外されても、残ったＬＥＤ照明灯の明るさが変化せず、寿命に悪影響を与えない電源回路を提供する。【解決手段】複数のＬＥＤ照明灯７Ｘ，７Ｙが夫々取着接続される接続部28Ｘ，28Ｙを電気的並列接続した並列回路部20と、並列回路部20に規定電流Ｉａを供給するための定電流供給回路部10と、を有する電源回路に於て、複数のＬＥＤ照明灯７Ｘ，７Ｙの内の１本が接続部28Ｘから通電中に外された際、外されたことを瞬時に検知して、規定電流Ｉａを残りのＬＥＤ照明灯７Ｙの規格電流に電流制限を行う検知制御手段３を備えた。【選択図】図１