Electric lamp and discharge devices: systems – Plural load device systems
Reexamination Certificate
2007-03-05
2011-11-08
Ismail, Shawki S (Department: 2819)
Electric lamp and discharge devices: systems
Plural load device systems
C313S607000, C313S268000
Reexamination Certificate
active
08054010
ABSTRACT:
An illuminating device for a display device includes a tube lamp which can be driven in parallel by power supplied from a power supply device through a first power supply member and a second power supply member; the first power supply member; and the second power supply member. The illuminating device is provided with illuminating sections whose equivalent circuit is a serially connected body having capacitors connected to the both ends of a negative resistance. The illuminating sections are driven in parallel by separating them into two systems. A voltage to be applied to the left end of the illuminating sections which belong to the first system, and a voltage to be applied to the left end of the illuminating sections which belong to the second system are permitted to be in opposite phases, and a voltage to be applied to the right end of the illuminating sections which belong to the first system and a voltage to be applied to the right end of the illuminating sections which belong to the second system are permitted to be in opposite phases. Thus, display noise of the display device can be reduced.
REFERENCES:
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patent: 7638945 (2009-12-01), Takata
patent: 2003/0214478 (2003-11-01), Yoo et al.
patent: 2006/0197424 (2006-09-01), Takata
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Official Communication issued in International Patent Application No. PCT/JP2007/054151, mailed on Apr. 17, 2007.
Ismail Shawki S
Keating & Bennett LLP
Sharp Kabushiki Kaisha
Tran Thienvu
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