Light-emitting unit and illumination device and image...

Details Light-emitting unit and illumination device and image... Light-emitting unit and illumination device and image...

2005-06-07

2005-06-07

Husar, Stephen F (Department: 2875)

Illumination

Light fiber, rod, or pipe

Light emitting diode

C362S800000, C361S813000, C257S666000, C358S484000

Reexamination Certificate

active

06902309

ABSTRACT:
A light-emitting unit20has a light-emitting unit board21made of resin provided with a lead frame22. The light-emitting unit board21is also provided with an open window21afor mounting a light-emitting device. The lead frame22comprises a lead terminal section22a, an inner lead section22c, and a light-emitting device mounting and connecting section22bwhich is exposed within the open window21a.The light-emitting devices23a,23b, and23care bonded with the light-emitting device mounting and connecting section22b, and electrodes of the light-emitting devices and the lead frame are connected by a metal wire24, wherein the open window21ais sealed by transparent resin. The lead frame22is made of iron-containing copper to improve heat radiation performance of the light-emitting unit board. By increasing maximum current to be supplied to the light-emitting diodes, it is possible to increase illumination brightness and to attain speedup of image reading.

REFERENCES:
patent: 4920074 (1990-04-01), Shimizu et al.
patent: 6017130 (2000-01-01), Saito et al.
patent: 6357903 (2002-03-01), Furusawa et al.
patent: 6504097 (2003-01-01), Kobayashi et al.
patent: 6621223 (2003-09-01), Hen
patent: 08-163320 (1996-06-01), None
patent: 10-126581 (1998-05-01), None

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