Communications: electrical – Visual indication – Using light emitting diodes
Reexamination Certificate
2006-04-28
2008-08-19
Pham, Toan N (Department: 2612)
Communications: electrical
Visual indication
Using light emitting diodes
C340S691100, C340S691600, C315S129000, C315S133000
Reexamination Certificate
active
07414540
ABSTRACT:
In one preferred embodiment, a power indicator circuit for a computer comprises a light-emitting diode (LED) indicating power management states of a computer; a first resister connected between one pole of the LED and a power source; a second resistor connected between the other pole of the LED and a power source, a first branch circuit connected between the one pole and ground; and a second branch circuit connected between the other pole and ground. Wherein the first resistor and the second resistor control a current through the LED. Because the LED emits lights of different colors or turns off according to the different power management states, it is easy for users to see what the power management state of the computer is.
REFERENCES:
patent: 5938772 (1999-08-01), Welch
patent: 6724889 (2004-04-01), Giles et al.
patent: 2006/0138967 (2006-06-01), Zhou et al.
patent: 2007/0090964 (2007-04-01), You et al.
He Feng-Long
You Yong-Xing
Zhou Hai-Qing
Chung Wei Te
Hon Hai Precision Industry Co. Ltd.
Hong Fu Jin Precision Industry ( ShenZhen) Co., Ltd.
Pham Toan N
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