Mopad Overview
Shown to the right is Mopad in a string-tie configuration. Here
the guts of the phone are in the crosspiece of the string tie. The
earphones are connected to the crosspiece through a wire that is
integrated into the "string" of the string tie.
(Although the earphones are simply draped down, they could instead
be spooled at the back of the neck to make them less obtrusive.)
There is no display nor controls on the core of the phone, so
instead wireless remote controls are used. Here, a call is being
screened through a wristwatch remote.
The advantages of this configuration are: very fast control
access (through the wrist remote), very fast audio access (through
earphones conveniently placed at the neck), stereo audio support,
and of course, hands free operation as the normal mode.
What's not apparent in the picture above is that the guts of
the phone (radio receiver, CPU, memory, etc.) are not
built directly into the string-tie. Instead, they are built into a
core module (the audiocore), which is plugged into a
receptacle in the string-tie and covered with the stylized
faceplate that you see.
Because
the audiocore is not integrated into the string tie, it can be
moved to other mounts -- a necktie mount (for
non-Texans!), a necklace mount, an armband mount for runners (or a
sportsbra mount for women runners), etc. Worn mounts can be given
a techno styling -- as with this armband mount -- or can be made
to appear as jewelry or accessories -- as with the string tie
mount. Such mounts are expected to be manufactured by
accessory/jewelry companies (Swatch, Rolex, etc.).
Importantly,
the mount does not have to be wearable. A handset mount
(speaker, microphone, display and controls, but no built-in core
components) can be used by users who don't always want to use a
wearable mount. And a deskphone mount can be used at the office or
at home. This mount is particularly useful by the side of the bed,
where it gives the user a conveniently larger phone to fumble for
in the middle of the night! Moreover, the deskphone mount can be
connected to other phones in the house through the wall wiring
system.
Like
mounts, remote controls can take a number of forms. A wristwatch
remote provides very quick access at the cost of a smaller display
and controls. A slightly larger, handheld remote can provide
better display and control, but is not as easy to access as the
wrist remote. Other devices, such as PDAs, and laptop and desktop
computers can also be used as remote controls.
The
user can carry different remotes at different times and can carry
more than one remote at a time. E.g., while running, the user
might carry/wear just a wrist remote, but during the business day
they might also carry a PDA remote -- or they might use their
laptop computer as a remote.
Because remotes can be carried or left behind, they act like
layers of clothing -- the user adds or leaves behind what is
appropriate for the occasion. However, the user always retains the
telephonic audiocore. So, a pocket remote with a built in camera
might be taken to a party, but left behind when heading to a
building or campus that does not allow camera phones.
Mopad Advantages
Safety: Hands-free operation is often
desired for safety reasons. Mopad meets this need better than any
current hands-free solution because it provides hands-free
operation as the normal mode.
Talk: Mopad reduces or removes
several major usability "costs" of current mobile
phones.
Hand-use Cost: Probably the
largest usability cost of mobile phones is the hand-use cost.
Current hands-free solutions reduce this cost, but introduce
other inconveniences. As a result, current hands-free solutions
are used for only a small percentage of the total calls made. In
contrast, Mopad makes hands-free operation a very convenient,
normal mode of operation. Thus with Mopad, almost all
calls will made hands-free.
Access Cost: Another substantial
cost of mobile phones is the time it takes to initiate, accept or
reject a phone call. Mopad reduces this cost by putting the
display and controls at hand (in the wrist remote), and the audio
IO at the neck. This allows a call
initiation/acceptance/rejection time of 1-2 seconds -- compared
to 10-20 seconds for a conventional handset.
Carriage Cost: Despite current
miniaturization, mobile phones can still be a hassle to carry.
Mopad makes mobile phones easier to carry in several ways:
Hands-free Carriage: Even a small voice-only
handset will often be left behind because the user's hands will
be busy with some task, or because they don't have a good pocket
or holster to carry the phone. Our wearable configurations
(e.g., necklace + wrist remote) provide convenient, hands-free
carriage.
Right-sizing: Larger phones, while providing
more power for info-warriors, are also more likely to be left
behind. Mopad resolves this by allowing the user to right-size
their phone by selecting the remote controls to use with it --
just a wristwatch for running or relaxing, or wristwatch + PDA
for info battle.
Styling: Wristwatches are items of style and
status. Mobile phones have started to head in this direction but
have not reached it yet -- style is still trumped by function.
As a result, there are occasions in which the user will not
carry a phone because it is insufficiently (or inappropriately)
stylish. Mopad's separation of form (mount) and function
(audiocore) allows the form to be matched to the occasion.
(E.g., for women, a mount might be a casual necklace for a day
at the beach, or an expensive piece of jewelry for a ball gown
event.)
Off-person Cost: The very
factors that make mobile phones easy to use on-person, make them
harder to use while off-person. When the phone rings in the
middle of the night, or while the user is in another room, its
smallness and portability make it hard to locate and use. Mopad
removes these off-person costs through its deskphone
configuration. The deskphone mount simultaneously provides:
recharging, speakerphone functionality, large form factor for
easy use, fixed position for easy location, and extension to
other phones through the house (through standard phone
wall-wiring).
Data: Mopad improves mobile phones as
data platforms in several ways:
Right sizing is described above,
and is most useful for strongly visual applications (email, web
surfing, games). These applications require larger screens, which
increase the bulk of the device, and thus increase the carriage
cost. By moving these applications to a PDA or game remote, Mopad
allows the user to configure their system to the balance of power
vs. bulk that's best for the moment.
Constant core availability means
that the user always has some basic level of computing and
communication power with them. With this available, the mobile
phone becomes the natural platform for a number of applications:
address books, calendars, electronic payment, identification,
health monitoring. While these applications can be run on smart
phones, the bulkiness of smart phones means that they're often
not carried. But Mopad's audiocore provides a basic level of
computing plus local and wide-range communication -- all of which
are nearly always available thanks to Mopad's hands-free carriage
configurations.
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