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Light source device using LED, and method of producing same
| Details |
Inventors: Sugimoto, Masaru; Shiohama, Eiji; Kimura, Hideyoshi; Hashimoto, Takuma; Suzuki, Toshiyuki; Nakagawa, Kazuya; Kobayashi, Mitsuru; Hashizume, Jiro;
Assignee: Matsushita Electric Works, Ltd. (Osaka, JP)
Primary Examiner: Sember; Thomas M.
Assistant Examiner: Truong; Bao Q.
Attorney, Agent or Firm: Greenblum & Bernstein, P.L.C.
A light source apparatus having a radiator plate having thermally conductive properties and an insulating member coupled to at least one side of the radiator plate having a through hole provided in a side thereof facing the radiator plate. The light source apparatus further including a LED chip installed and thermally coupled to an exposed portion of the radiator plate facing the through hole, an extension inwardly projecting at the through hole from the radiator plate end of the insulating member, and a wiring pattern provided on the insulating member electrically isolated by the insulating member from the radiator plate. The light source apparatus also including bonding wires electrically connecting portions of the wiring pattern on the extension and the electrodes of the LED chip, and a light-transmissive sealing material filling the through hole for entirely encapsulating the LED chip and the bonding wires. |
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DETAILED DESCRIPTION What is claimed is: 1.
A light source apparatus for emitting light from a LED chip, comprising: a radiator plate having thermally conductive properties; an insulator positioned on at least one side of the radiator plate having a through hole facing the radiator plate; the LED chip being mounted on and thermally coupled to an exposed portion of the radiator plate facing the through hole; a wiring pattern positioned on the insulator and electrically isolated by the insulator from the radiator plate; connectors that electrically connect the wiring pattern to electrodes of the LED chip; and sealing material in the through hole that entirely encapsulates the LED chip and the connectors, wherein portions of the wiring pattern electrically connected by the connectors to the LED chip are located in a bottom of the through hole adjacent to the radiator plate.
2.
The light source apparatus according to claim 1, wherein the portions of the wiring pattern electrically connected by the connectors to the LED chip are located in the through hole which is filled to an opening of the through hole with the sealing material.
3.
The light source apparatus according to claim 1, wherein the insulator has an inwardly projecting extension at the radiator plate side of the through hole and on which at least portions of the wiring pattern are arranged, the radiator plate has a projection provided on the insulator side configured for insertion into the through hole in the insulator and on which the LED chip is arranged and thermally coupled to the radiator, and the portions of the wiring pattern on the extension are electrically connected to the electrodes of the LED chip.
4.
The light source apparatus according to claim 3, wherein the connectors are metal wires, and a portion of the LED chip to which each metal wire is connected at one end is substantially flush with a portion of the wiring pattern to which the other end of each metal wire is connected.
5.
The light source apparatus according to claim 3, wherein the top of the projection on which the LED chip is mounted is substantially flush with a portion of the wiring pattern to which the LED chip is electrically connected
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