Shared interface device

Details Shared interface device Shared interface device

2001-10-23

2004-08-24

Edwards, Timothy (Department: 2635)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C361S689000, C710S303000

Reexamination Certificate

active

06781525

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a shared interface device, especially to a shared interface device connected between a portable electronic device and a peripheral unit.
BACKGROUND OF THE INVENTION
The current portable electronic devices such as personal digital assistants (PDA) and cellulous phones are often connected to peripheral unit such as keyboard for inputting data. In those portable electronic devices, the power transmission function and the signal transmission function are generally assigned at different pins.
As shown in
FIG. 1
, conflict is occurred if the power transmission function and the signal transmission function are assigned at the same pin
8
of a portable electronic device
1
a
. When a peripheral unit
2
a
is connected to the portable electronic device
1
a
and powered by the portable electronic device
1
a
through the pin
8
of the portable electronic device
1
a
, the peripheral unit
2
a
can only send data to the portable electronic device
1
a
and cannot receive data from the portable electronic device
1
a
because the transmitting data pin and the power supplying pin of the portable electronic device
1
a
are defined at the same pin
8
. Therefore, the peripheral unit
2
a
cannot communicate with the portable electronic device
1
a
in bidirectional fashion.
Moreover, if the pin
8
of the portable electronic device
1
a
is functioned to transmit data to the peripheral unit
2
a
, the peripheral unit
2
a
cannot be powered by the portable electronic device
1
a
. This is inconvenient for user.
SUMMARY OF THE INVENTION
It is the object of the present invention to provide a shared interface device connected between a portable electronic device and a peripheral unit, wherein both the power supplying function and the data transmission function can be assigned to one pin with no confliction and bi-directional data transmission is possible.
To achieve the above object, the present invention provides a shared interface device having a switch and an energy-storing element and arranged between a portable electronic device and a peripheral unit. When a T×D/POWER pin of the portable electronic device is HI and there is no transmitted data, the switch is ON to provide electric power to the peripheral unit and charge the energy-storing element. Moreover, when there is transmitted data present and the T×D/POWER pin of the portable electronic device is LO, the switch is OFF and the energy-storing element is functioned as backup power supply of the peripheral unit. Moreover, when there is transmitted data present and the T×D/POWER pin of the portable electronic device is HI, the switch is ON to provide electric power to the peripheral unit and charge the energy-storing element.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:


REFERENCES:
patent: 5020090 (1991-05-01), Morris
patent: 5367563 (1994-11-01), Sainton
patent: 5753982 (1998-05-01), Yeh
patent: 6098127 (2000-08-01), Kwang
patent: 6375344 (2002-04-01), Hanson et al.
patent: 6466437 (2002-10-01), Sakuragi et al.
patent: 6683786 (2004-01-01), Yin et al.
patent: 6718408 (2004-04-01), Esterberg et al.
patent: 2002/0095533 (2002-07-01), Esterberg et al.
patent: 2002/0119685 (2002-08-01), Gardenfors et al.
patent: 08123593 (1996-05-01), None

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