Power on/off in combined PDA/telephone

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

Reexamination Certificate

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Details

C455S572000, C455S090300, C345S179000, C713S310000

Reexamination Certificate

active

06233464

ABSTRACT:

TECHNICAL FIELD
This invention relates to powering on and off a Personal Digital Assistant (PDA), such as a Palm Pilot It has special relation to doing so in response to the stylus being removed or replaced, and in co-ordination with a combined wireless telephone. QUALCOMM Incorporated manufactures such a combination under the trademark “pdQ smartphone”.
BACKGROUND ART
A PDA is a computer small and light enough to be carried on the person. It is so small that a full-alphabet keyboard would have keys so small as to be of little use. Accordingly, the PDA includes a removable stylus. The user presses the stylus onto a User Interface (UI). The UI is pressure sensitive to the touch of the stylus, so that the user may enter data. The UI is also a monitor, and thus can display data as well.
The PDA may be combined with a wireless telephone. It is more convenient for the user to have a single device on his belt, rather than having two. Moreover, data may be quickly and accurately transferred between the telephone and PDA. A keypad hinges from the bottom of the PDA. When the keypad is closed, the exterior of the keypad displays the keys which may be pressed to place a telephone call. When closed, the keypad covers some (but not all) of the User Interface. When the keypad is open, the remaining portions of the UI are exposed, and the interior of keypad shows the stylus strokes which may be used to enter data into the UI.
It is important that the power on/off of the telephone be coordinated with the power on/off of the PDA If the telephone is improperly off, a call may be dropped or missed. If the PDA is improperly off, data may be lost. If either or both are improperly on, battery life will be shortened.
BRIEF DISCLOSURE OF THE INVENTION
The present invention provides a switch which, if selected by the user, will power-on the Personal Digital Assistant (PDA) in response to the stylus being removed from the PDA. The switch, also selectably, will power-off PDA in response to the stylus being replaced into the PDA. The switch further allows selection as to whether either or both of these actions will also turn the telephone on or off. The switch further allows selection as to whether either or both of these actions will also open or close the keypad.


REFERENCES:
patent: 5396443 (1995-03-01), Mese et al.
patent: 5483262 (1996-01-01), Izutani
patent: 5644628 (1997-07-01), Schwarzer et al.
patent: 5797089 (1998-08-01), Nguyen
patent: 5933783 (1999-08-01), Kawakami et al.
patent: 5983073 (1999-11-01), Ditzik
patent: 6014552 (2000-01-01), Aiken et al.

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