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Mobile Phone Patent Abstract
A mobile phone alarm includes a phone device to be attached to a
mobile phone and a body device to be carried by a user. The phone
device repeatedly transmits a verification signal to the body device.
The verification signal has a limited power to be identifiable within
a limited, predetermined limited distance, suck as one meter, so
that once the distance between the phone device and the body device
is greater than the limited pre-determined distance, the body device
receives no verification signal and alarms. The phone device also
detects the ringing of the mobile phone and once the mobile phone
is ringing, the phone device sends a signal to the body device for
notifying the user.
Mobile Phone Patent Claims
What is claimed is:
1. A mobile phone alarm comprising:
a) a body device for carrying by a user, the body device including
means for receiving signals and means for issuing an alarm;
b) a phone device for attaching to a mobile phone, the phone device
including means for repeatedly transmitting a first signal having
a predetermined power to be identified within a predetermined distance,
means to transmit a second signal indicating a ringing condition
of the mobile phone, the first and second signals being receivable
by the body device; and
c) an integrated circuit chip for disposition within a battery
set of the mobile phone and an electrical connection with the battery
set, the integrated chip set including means for detecting change
of current flow through the battery set to determine if the mobile
phone is ringing.
2. The mobile phone alarm of claim 1 wherein the phone device is
externally attached to the mobile phone.
3. The mobile phone alarm of claim 1 further including an enclosure
for encasing the phone device and the mobile phone to retain the
phone device to the mobile phone.
4. The mobile phone alarm of claim 1 wherein the means for issuing
an alarm includes a buzzer to generate an audio signal.
5. The mobile phone alarm of claim 1 wherein the means for issuing
an alarm includes a vibrator to generate a vibration signal.
6. The mobile phone alarm of claim 1 wherein the means for issuing
an alarm includes means for generating an audio signal, means for
generating a vibration signal and selection means for switching
between the audio signal generation means and the vibration signal
generation means.
7. The mobile phone alarm of claim 1 wherein the predetermined
distance is one meter.
Mobile Phone Patent Description
FIELD OF THE INVENTION
The invention relates generally to an alarm device and in particular
to an alarm device to be incorporated in a mobile phone for generating
an alarm signal once the mobile phone has been left far away from
the user and also serving to notify the user of an in-coming call
when the mobile phone is located distant from the user.
BACKGROUND OF THE INVENTION
With the development of telecommunication technology, mobile phones
are nowadays smaller and lighter weight than ever so as to enhance
the portability. Such an improvement in portability, however, leads
in the problem that the mobile phones are often left behind and
lost and are hard be looked for once lost.
Further, once a mobile phone is placed at a distance far away from
the user, the ringing that indicates an in-coming call may not be
properly recognized by the user.
It is therefore desirable to provide a mobile phone alarm to overcome
such problems.
SUMMARY OF THE INVENTION
In accordance with the present invention, the problem of lost mobile
phone is overcome by providing a mobile phone alarm which comprises
a phone device to be attached to a mobile phone which repeatedly
transmit a verification signal (an electro-magnetic signal) of a
limited power to be receivable within a limited, pre-determined
range. A body device is clipped or otherwise secured to the phone
user, similar to a beeper, to receive the verification signal from
the phone device. The body device generates an alarm signal once
the user is at a distance from the mobile phone greater than the
transmission range of the verification signal to notify the user.
In accordance with another aspect of the present invention, the
phone device is also designed to transmit a phone call signal (an
electro-magnetic signal) to the body device once a call is coming
and the phone is ringing. The body device, in response to the phone
call signal, generates an alarm signal of beeping or vibrating,
similar to a beeper, to notify the phone user of the in-coming call.
BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the present invention will become
apparent in the following detailed description of preferred embodiments
of the invention, with reference to the attached drawings, wherein:
FIG. 1 is a perspective view showing a mobile phone and a mobile
phone alarm in accordance with the present invention;
FIG. 2 is a side elevational view showing a phone device in accordance
with the present invention externally attached to the mobile phone;
FIG. 3 is a perspective view showing an alternative phone device
in accordance with the present invention that is built in the battery
set of the mobile phone;
FIG. 4 is a plot of the power consumption of the mobile phone;
FIG. 5 shows an operation flow chart of the phone device of the
present invention;
FIG. 6 shows an operation flow chart of the body device of the
present invention;
FIG. 7 is a circuit block diagram of the phone device of the present
invention; and
FIG. 8 is a circuit block diagram of the body device of the present
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference to the drawings and in particular to FIGS. 1-3,
wherein a mobile phone alarm constructed in accordance with the
present invention is shown, the mobile phone alarm in accordance
with the present invention comprises a body device 2 to be clipped
or otherwise secured to for example the cloth of a user (not shown)
in a way similar to a beeper to generate a user alarm signal and
a phone device to be externally attached to a mobile phone 1, as
that designated with the reference numeral 31 in FIG. 2 or to be
built in for example a battery set 12 of the mobile phone 1, as
that designated with the reference numeral 32 in FIG. 3.
In accordance with an aspect of the present invention, the phone
device 31 or 32 repeatedly transmits a verification signal which
is preferably an electro-magnetic signal, such as a radio frequency
(RF) signal, of a limited power to be identifiable within a limited,
pre-determined distance, such as 1 meter. The body device 2 which
is devised to receive the verification signal from the phone device
31 or 32 generates an alarm signal, such as beeping sound or vibration
to notify the user once the body device 2 does not receive the verification
signal which means that the user is outside the predetermined distance
range that the verification signal can reach.
In accordance with another aspect of the present invention, the
phone device 31 or 32 is also devised to detect the ringing of the
mobile phone 1 so as provide a phone call signal, which is preferably
an electro-magnetic signal, such as an RF signal, to the body device
2 to notify the user that a call is coming.
The external phone device 31 shown in FIG. 2 is designed to attach
to the bottom of the mobile phone 1 and retained there by having
a leather sheath 11 that is a commonly known mobile phone accessary
fit over both the external phone device 31 and the mobile phone
1. The external phone device 31 repeatedly generates and transmits
the verification signal to the body device 1. The external phone
device 31 also serves to detect if the mobile phone 1 is ringing
and if so, generates and transmits the phone call signal to the
body device 1.
The internal phone device 32 shown in FIG. 3 is designed to be
disposed within the replaceable battery set 12 of the mobile phone
1 and is preferably in the form of an integrated circuit (IC) chip
to be placed within a gap 1210 between cells 121. Similar to the
external phone device 31 shown in FIG. 2, the internal phone device
32 repeatedly transmits the verification signal to the body device
2. The internal phone device 32 is in electrical connection with
the cells 121 to detect the change in current through the cells
121 so as to identify if a call is coming in order to generate and
transmit a phone call signal to the body device 2.
In FIG. 4, the current change in the mobile phone 1 in different
conditions are illustrated, such as STANDBY when the current is
the smallest, RINGING when the current is increased and IN OPERATION
when the current is the largest. By detecting the change in the
current flow, the internal phone device 32 determines if the mobile
phone 1 is ringing and/or in operation.
To provide the above functions, a circuit block diagram of an embodiment
of the phone body 31 or 32 is illustrated in FIG. 7, comprising
an encoder circuit 40 which provides a device identification signal
that may be generated by a dip switch set or a circuit (not shown)
to a signal processing circuit 42. A ringing detection circuit 44,
which may comprise a current consumption detection circuit 46 in
the embodiment of FIG. 3, to provide a ringing signal to the signal
processing circuit 42, preferably via an amplifier circuit 48, to
be combined with the device identification signal. The signal processing
circuit 42 provides a combination of the device identification signal
and the amplified ringing signal to a modulation circuit 50 from
which a modulated signal is forwarded to an RF transmitter circuit
52 to generate a high frequency RF verification signal to be transmitted
therefrom through an antenna 54.
A power management circuit 56 may be included in the circuit of
the phone device 31 or 32 to reduce the power consumption of the
circuit.
In FIG. 8, a circuit block diagram of the body device 2 is illustrated,
comprising an antenna 60 to receive the high frequency verification
signal and/or the phone call signal from the phone device 31 or
32. The received high frequency signal is first amplified with a
high frequency (HF) amplifier circuit 62 and a local oscillation
signal from a local oscillator 64 is provided to the HF amplifier
62 to obtain a medium frequency (MF) signal which is then transmitted
through a MF amplifier circuit 66 to a detector circuit 68 of which
the output signal is sent through a waveform shaping circuit 70
to a decoder 72. The decoder 72 decodes the signal so obtained and
generates an alarm signal, which is either an audio signal via a
sound generating means, such as a buzzer 74 or a vibrating signal
via a vibrator 76 to notify the user. A selector 78 may be provided
between the alarm signal generation means, including both 74 and
75, and the decoder circuit 72 to allow the user to switch the alarm
signal between the audio signal or the vibrating signal.
A power management circuit 80 may be included in the circuit of
the body device 2 to reduce the power consumption of the circuit.
In FIG. 5, an operation flow chart of the phone device 31 or 32
is illustrated. The operation flow begins at the entry point 200
where the phone device 31 or 32 is at standby condition. Then the
phone device 31 or 32 transmits the verification signal at 202.
At 204, the phone device 31 or 32 detects if the mobile phone 1
is ringing. If yes, the phone device 31 or 32 transmits the phone
call signal at 206 to the body device 2 and then goes back to step
202. If the detection of ringing is negative (no), the phone device
31 or 32 goes directly back to 202 to repeat transmitting verification
signal to the body device 2.
An operation flow chart of the body device 2 is illustrated in
FIG. 6, wherein the flow begins at the entry point 300 where the
body device 2 is in standby condition. The body device 2 then tests
if a verification signal is received at 302. If not, it indicates
at 304 that the mobile phone 1 is located at a distance greater
than the predetermined value from the body device 2 and an alarm
is generated at 308. If the test of verification signal at step
302 is positive, then the body device 2 goes on to test if a phone
call signal is received at 306. If no, then the body device goes
back to test step 302, otherwise if a phone call signal is received,
an alarm is issued at 308.
It is apparent that although the invention has been described in
connection with the preferred embodiments, it is contemplated that
those skilled in the art may make changes to the preferred embodiments
without departing from the scope of the invention as defined in
the appended claims.
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