Electric lamp and discharge devices: systems – With signal – indicator – or alarm
Reexamination Certificate
2008-05-07
2010-11-23
Owens, Douglas W (Department: 2821)
Electric lamp and discharge devices: systems
With signal, indicator, or alarm
C315S133000, C315S196000, C315S313000, C340S691100, C340S815400
Reexamination Certificate
active
07839090
ABSTRACT:
A circuit is used to indicate different statuses of a component of a computer system. The circuit includes a port, an indicating device, and a control circuit. The port outputs different signals corresponding to different statuses of the component. The indicating device includes a first indicator and a second indicator each of which includes a positive end and a negative end. The positive end of the second indicator is connected to the negative end of the first indicator, and the negative end of the second indicator is connected to the positive end of the first indicator. The control circuit includes an input terminal, and a pair of output terminals connected to opposite ends of the first indicator. A polarity of an electric potential difference between the pair of output terminals is switched between negative and positive polarities according to the signal outputted by the port.
REFERENCES:
patent: 4195281 (1980-03-01), Bell
patent: 6246186 (2001-06-01), Nieberger
patent: 6559606 (2003-05-01), Chou et al.
patent: 7414540 (2008-08-01), You et al.
patent: 2006/0097658 (2006-05-01), Chiang et al.
patent: 2006/0138967 (2006-06-01), Zhou et al.
Hon Hai Precision Industry Co. Ltd.
Hong Fu Jin Precision Industry ( ShenZhen) Co., Ltd.
Le Tung X
Niranjan Frank R.
Owens Douglas W
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