Backlight unit equipped with light emitting diodes

Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With housing or contact structure

Reexamination Certificate

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Details

C257S088000, C257SE33075, C257SE33066

Reexamination Certificate

active

08053804

ABSTRACT:
Disclosed herein is a backlight unit equipped with LEDs. The backlight includes an insulating substrate, a plurality of LED packages, an upper heat dissipation plate, and a lower heat dissipation plate. The insulating substrate is provided with predetermined circuit patterns. The LED packages are mounted above the insulating substrate, and are electrically connected to the circuit patterns. The upper heat dissipation plate is formed on the insulating substrate, and is configured to come into contact with the circuit patterns and to dissipate heat. The lower heat dissipation plate is formed on the insulating substrate, and is configured to transmit heat transmitted through the upper heat dissipation plate. The upper heat dissipation plate and the lower heat dissipation plate are connected to each other by at least one through hole, and the through hole and the upper heat dissipation plate have a predetermined area ratio.

REFERENCES:
patent: 6065823 (2000-05-01), Kawamura
patent: 6920046 (2005-07-01), Spryshak
patent: 6999318 (2006-02-01), Newby
patent: 7456499 (2008-11-01), Loh et al.
patent: 2004/0160173 (2004-08-01), Shen et al.
patent: 2004/0184272 (2004-09-01), Wright et al.
patent: 2005/0067953 (2005-03-01), Yamazaki et al.
patent: 2006/0023448 (2006-02-01), Mok et al.
patent: 2005-283852 (2005-10-01), None
patent: WO 2005/001943 (2005-01-01), None
patent: WO 2005001943 (2005-01-01), None
Japanese Office Action issued in Japanese Patent Application No. 2007-055384, dated Nov. 17, 2009.
European Search Report issued in European Patent Application No. 07103453.2-1232, mailed Feb. 4, 2011.
Japanese Office Action, w/ English translation thereof, issued in Japanese Patent Application No. JP 2010-016653 dated Jun. 7, 2011.

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