LIGHT-EMITTING DIODE LIGHTING DEVICE

• Main Authors: YABUTA MASAHIRO, OSAWA TAKASHI
• Format: Patent
• Language: English
• Published: 08.06.2006
• Subjects: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL; BASIC ELECTRIC ELEMENTS; BLASTING; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; PERFORMING OPERATIONS; SEMICONDUCTOR DEVICES; SYSTEMS THEREOF; TRANSPORTING; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; VEHICLES IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To obtain an LED lighting device capable of stably lighting a plurality of LEDs by lowering a current ripple caused by switching operation and reducing power source noise. SOLUTION: The device is provided with an LED circuit connecting one or a plurality of LEDs connected in series, and switching elements provided at a power supply channels of the plurality of LED circuits connected in paralel with the power source. A timing adjustment circuit is installed in correspondence with each LED circuit so as to shift on/off-operation timing, to avoid the concurrent on/off-operations of the switching elements caused by the overlapping of the on/off-timings of the switching elements. COPYRIGHT: (C)2006,JPO&NCIPI