Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2002-02-07
2003-12-09
Berhane, Adolf D. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
C320S127000
Reexamination Certificate
active
06661199
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates to a power charge system used in a portable electric device. More specifically, the present invention discloses a power charge system for flexibly charging a portable electric device using a module design of combination of transforms and converts.
2. Description of the Prior Art
In recent years, portable electric devices such as mobile phones, personal data assistants (PDA), Walkmans, digital versatile disc players, hand-held computers, and notebooks have grown in popularity due to their convenience and practicality.
Portable electric devices have batteries for providing wanted electric power when the portable electric devices operate. When the electric power of a battery is exhausted, the battery needs to be charged so as to maintain effective operation of the portable electric device. Please refer to FIG.
1
.
FIG. 1
is a diagram of a power charging system of a portable electric device according to the prior art. As shown in
FIG. 1
, a portable electric device
10
A comprises a charge port
12
A for receiving a direct current (DC) operating voltage of the portable electric device
10
A, and transformers
16
A and
18
A corresponding to the charge port
12
A for charging the portable electric device
10
A. The transformer
16
A has an input port
17
A for receiving an alternating current (AC) voltage from an AC power supply
20
. The transformer
16
A converts the AC voltage into the operating voltage of the portable electric device
10
A and outputs the operating voltage to the portable electric device
10
A through an output port
14
A. The transformer
18
A has an input port
19
A for receiving a direct current (DC) voltage from a DC power supply
22
. The transformer
18
A converts the DC voltage into the operating voltage of the portable electric device
10
A and outputs the operating voltage to the portable electric device
10
A through an output port
15
A. When the portable electric device
10
A needs be charged, the transformer
16
A or
18
A is chosen to electrically connect with its corresponding power supply through the input port
17
A or
19
A, and the output port
14
A or
15
A of the transformer
16
A or
18
A is electrically connected to the charge port
12
A. Therefore, the corresponding transformer
16
A or
18
A converts the voltage of the power supply
20
or
22
into the operating voltage of the portable electric device
10
A and outputs the operating voltage to the portable electric device
10
A through the charge port
12
A so as to charge the portable electric device
10
A.
According to the same prior art, a portable electric device
10
B also comprises a charge port
12
B for receiving an operating voltage of the portable electric device
10
B, and transformers
16
B and
18
B corresponding to the charge port
12
B for charging the portable electric device
10
B. The transformer
16
B has an input port
17
B for receiving the AC voltage from the AC power supply
20
. The transformer
16
B converts the AC voltage into the operating voltage of the portable electric device
10
B and outputs the operating voltage to the portable electric device
10
B through an output port
14
B. The transformer
18
B has an input port
19
B for receiving the DC voltage from a DC power supply
22
. The transformer
18
B converts the DC voltage into the operating voltage of the portable electric device
10
B and outputs the operating voltage to the portable electric device
10
B through an output port
15
B.
Different portable electric devices have different operating voltages usually ranging from 3 volts to 12 volts. The charge port of each different portable electric device has different shapes and structures for receiving electric power. Therefore, for the prior art power charge system, the portable electric device must have a specific transformer for converting the received voltage from a power supply into the operating voltage of the portable electric device. Furthermore, the output port of the transformer must match up with the charge port of the portable electric device. When a user carries two or more portable electric devices, the user must carry the specific transformer of each portable electric device for charging each portable electric device. Although the transformers
16
A and
16
B are both capable of transforming the AC voltage generated from the AC power supply
20
, the voltages after transforming and outputting through the corresponding output ports
14
A and
14
B are the specific operating voltages of the portable electric devices
10
A and
10
B. Likewise, the shapes of the output ports
14
A and
14
B of the transformers
16
A and
16
B are different for matching up with the corresponding charge ports
12
A and
12
B of the portable electric devices
10
A and
10
B. For the above-mentioned reasons, the transformer
16
A cannot charge the portable electric device
10
B, and the transformer
16
B also cannot charge the portable electric device
10
A.
On the other hand, if a user wants to charge one portable electric device with two different power supplies, the user must carry the different transformers to the portable electric device for transforming the voltages generated from the different power supplies into the operating voltage of the portable electric device. As shown in
FIG. 1
, if the user wants to charge the portable electric device
10
A with the DC power supply
22
and the AC power supply
20
, the user must carry the corresponding transformers
16
A and
18
A.
SUMMARY OF INVENTION
It is therefore a primary objective of the claimed invention to provide a power charge system with converters for charging different portable electric devices through a transformer using the same power supply so as to solve the above-mentioned problems.
The claimed invention discloses a power charge system for charging a plurality of portable electric devices. Each portable electric device has a charging port for receiving an operating voltage of the portable device. The power charge system comprises a plurality of transformers for converting a plurality of different input voltages into a direct current (DC) standard voltage, and a plurality of converters for converting the standard voltage into the operating voltage of the plurality of portable electric devices. When a portable electric device needs to be charged, a converter corresponding to the portable electric device is capable of being electrically connected to any one of the transformers to receive the standard voltage from the transformer so as to charge the portable electric device.
It is an advantage of the claimed invention that a user can arbitrarily choose different power supplies for charging different portable electric devices, since the different power supplies only need match up with a corresponding transformer, and the different portable electric devices only need match up with a corresponding converter.
These and other objectives and advantages of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
REFERENCES:
patent: 5734254 (1998-03-01), Stephens
patent: 6087815 (2000-07-01), Pfeifer et al.
Berhane Adolf D.
Hsu Winston
Luk Lawrence
Primax Electronics Ltd.
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