Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-01-12
2010-11-16
Mengistu, Amare (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S210000, C345S211000
Reexamination Certificate
active
07834828
ABSTRACT:
The LED driving semiconductor apparatus for driving at least one LED includes an input terminal, an output terminal, a switching element block and a controller. The input terminal is connected to a high voltage side of a rectifying circuit for rectifying an alternating current voltage, and inputs the voltage from the rectifying circuit. The output terminal is provided for supplying a current to the LED. The switching element block is connected between the input terminal and the output terminal, and has a first switching element. The controller includes a regulator for generating a power source voltage for driving and controlling the switching element block, and a drain current detector for detecting a drain current of the switching element block, and performs on/off control of the first switching element to block the drain current of the switching element block when the drain current reaches a predetermined threshold.
REFERENCES:
patent: 6667583 (2003-12-01), Kerenyi
patent: 2008/0018267 (2008-01-01), Arakawa et al.
patent: 2001-313423 (2001-11-01), None
patent: 2001-351789 (2001-12-01), None
International Preliminary Report on Patentability issued Jul. 26, 2007, in the International (PCT) Application No. PCT/JP2006/300276.
Arakawa Ryutaro
Fukui Minoru
Hachiya Yoshiaki
Kunimatsu Takashi
Mengistu Amare
Panasonic Corporation
Rodriguez Joseph G
Wenderoth , Lind & Ponack, L.L.P.
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