Light-emitting diode light source unit

• Main Authors: TAMAI, MASAYUKI, MORIMOTO, KEIJI
• Format: Patent
• Language: English; French; German
• Published: 27.05.2009
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BASIC ELECTRIC ELEMENTS; BLASTING; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CINEMATOGRAPHY; CORRECTION OF TYPOGRAPHICAL ERRORS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; HOLOGRAPHY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; 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; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS; LIGHTING; LINING MACHINES; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; MECHANICAL ENGINEERING; NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; NON-PORTABLE LIGHTING DEVICES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PRINTED CIRCUITS; PRINTING; SELECTIVE PRINTING MECHANISMS; SEMICONDUCTOR DEVICES; STAMPS; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; TRANSPORTING; TYPEWRITERS; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

A light source unit includes a substrate mounting a plurality of light emitting diodes (LED's) for irradiating beam to an object. The substrate (P) is formed of a material having high heat conductivity and the unit includes a chip resistor mounted on the substrate and heat generation controller (HC) for heating the substrate with heat generated in the chip resistor upon supply of power to the chip resistor. The plural LED's are arranged in the form of an array on the substrate and a plurality of the chip resistors are arranged linearly along the array of LED's.