U.S. patent application number 10/885048 was filed with the patent office on 2004-12-02 for keyless keyboard and a method of using thereof.
Invention is credited to Ye, Liangang (Mark).
Application Number | 20040240924 10/885048 |
Document ID | / |
Family ID | 26979393 |
Filed Date | 2004-12-02 |
United States Patent
Application |
20040240924 |
Kind Code |
A1 |
Ye, Liangang (Mark) |
December 2, 2004 |
Keyless keyboard and a method of using thereof
Abstract
A novel keyless keyboard uses membrane switches or touch screen
to generate keystroke signals, without traditional keycaps. The
keyless keyboard can be folded to further reduce its size during
storage. The keyless keyboard unfolds into a keyboard of normal
desktop keyboard size for easy use. When touch screen is used, the
keyboard is also a display screen.
Inventors: |
Ye, Liangang (Mark);
(Houston, TX) |
Correspondence
Address: |
Liangang Ye
13926 Queensbury Lane
Houston
TX
77079
US
|
Family ID: |
26979393 |
Appl. No.: |
10/885048 |
Filed: |
July 6, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10885048 |
Jul 6, 2004 |
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10314516 |
Dec 9, 2002 |
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6796734 |
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60340768 |
Dec 11, 2001 |
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Current U.S.
Class: |
400/472 |
Current CPC
Class: |
H01H 2221/002 20130101;
H01H 2223/052 20130101; H01H 13/702 20130101; H01H 2009/0221
20130101; H01H 2221/056 20130101 |
Class at
Publication: |
400/472 |
International
Class: |
B41J 005/08 |
Claims
1. An apparatus for data input into an electronic device,
comprising: a plurality keypanels and a fold line in between two
adjacent keypanels, along the fold lines, the keypanels can be
folded, wherein the keypanels form a substantially smooth surface
when unfolded, wherein the surface is divided into a plurality of
keyareas and a unique keystroke signal can be generated by the
keyarea when the keyarea is pressed; and a connector through which
the signals from keypanels are transmitted to the electronic
device.
2. The apparatus as in claim 1, wherein one keypanel further
comprising a toggle key, and wherein a keyarea on the keypanels
generates a different keystroke signal before and after the toggle
key is pressed.
3. The apparatus as in claim 1, wherein keyareas in a keypanel are
arranged into colums and rows; wherein each row is perpendicular to
the fold lines; wherein each column is parallel to the fold lines;
and wherein each row comprises at least two keyareas and each
column comprises at least two keyareas.
4. The apparatus as in claim 1, wherein the keypanel comprises a
touch screen.
5. The apparatus as in claim 4, wherein the size of keyarea is
adjustable according to the sizes of a user's fingers.
6. The apparatus as in claim 4, wherein the keypanel further
comprises a displaying screen.
7. The apparatus as in claim 6, wherein the touch screen and
display screen comprises: a) a layer of clear protective coat; b) a
layer of pressure sensitive sheet; c) a layer of liquid crystal
display; and d) a layer of hard backing.
8. The apparatus as in claim 1, wherein the keypanel comprises a
membrane switch.
9. The apparatus as in claim 1, wherein each keypanel is less than
90 mm high, less than 60 mm wide and less than 2 mm thick.
10. The apparatus for data input into an electronic device as in
claim 1, further comprises: a plurality of keydots, each having a
first surface and second surface wherein the first surface is
adapted to be temporarily attached to a human finger tip; and
wherein the second surface can be pressed against the keyareas on
the keypanels to cause the keypanels to generate keystroke
signals.
11. The apparatus for data input into an electronic device as in
claim 1, further comprises: a housing, mechanically and
electronically connected to a keypanel and the connector; and an
electronic circuit board housed inside the housing for processing
the signals generated by the keyareas on the keypanels.
12. The apparatus as in claim 9, wherein each keypanel is 1 mm
thick or less.
13. The apparatus as in claim 12, wherein each keypanel is 0.2 mm
thick or less.
14. The apparatus as in claim 7, wherein the display screen is
about 90 mm high by 216 mm wide with 250.times.550 pixels.
15. A foldable keyboard comprising: a keyboard body composed of at
least two touch panels in serial connection wherein adjacent touch
panels being connected by a flexible printed circuit such that the
touch panels can be stacked each other and expanded; and a
plurality of keys formed by segmenting a plurality of blocks on the
touch panels.
16. A foldable keyboard for portable electronic devices comprising:
a keyboard body having a plurality of touch panels, and a plurality
of flexible printed circuits electrically connected two adjacent
touch panels in a lateral direction thereby enabling the keyboard
body to fold laterally in a stacked way, in which the keyboard body
has the same area as that of main typing region on a standard-sized
computer keyboard when unfolding the touch panels; each touch panel
having a pair of conductive membranes being segmented into a
plurality of blocks, in which the touch panels generates a panel
signal when the pair of conductive membranes are pressed into
contact, and each block corresponds to a panel signal; and a
plurality of legends formed on the touch panels, wherein the
legends respectively corresponds to the blocks and are arranged as
the standard keyboard.
Description
RELATED APPLICATION
[0001] This application is a Continuation Application of a
co-pending utility patent application Ser. No. 10/314,516, filed on
Dec. 9, 2002, titled "A keyless keyboard and keys and a method of
using them," by the same inventor, which claims priority from a
provisional application filed on Dec. 11, 2001, Ser. No. 60/340,768
with the same title under 35 U.S.C. .sctn. 119(e).
BACKGROUND OF THE INVENTION
[0002] (1) Field of the Invention
[0003] This invention relates to electronic manual input devices,
in particular relates to computer keyboards.
[0004] (2) Description of the Related Art
[0005] With the miniaturization of digital electronics and their
increasing functionality, computers are getting smaller and
smaller. Similarly, small electronic devices become capable of
performing more and more functions. The handheld computers, such as
Palm Pilot, Handspring, Pocket PCs are not only capable of being
Personal Digital Assistants (PDA), which keep contact information,
To-Do lists, Calendar and short memos, they are now having enough
computing power and memories to be bona fide personal computers.
Each of them is small enough to fit in a man's shirt pocket or
one's hand. To maintain the compact size, most handheld computers
do away with traditional keyboards. The main input devices for most
handheld computers are styluses. The styluses are fine if one only
need to input a person's phone number or similar very minimum data
entry. It becomes awkward, slow and painful when the data entry
requirement is slightly more demanding, such as entering a long
address, taking a note of a telephone call or To-Do item, or taking
note for a meeting or a lecture. Their input speeds are greatly
reduced comparing to ten-finger touching typing using a regular
keyboard. Using a stylus is almost equivalent to one-finger typing.
Some of PDAs allow a combination of point and click typing and
pen-based scribing. Some claim the combined clicking/scribing
speeds up to 40 WPM, very close to regular keyboard typing, e.g.
Silverscreen, a software-keyboard available for Palm PDA.
[0006] Similarly, other electronic gadgets, such as cellular
phones, are small and have fairly large memories and many
functions. But many of them only have numeral keys. To enter
characters into the memory, one has to use numerical coding, i.e.
presses a number key several times to enter one character or
number. For example, on a Nokia 3390 cellular phone, to enter a
letter "a", one need to press 2, i.e. press number key 2 once and
pause before pressing other keys. To enter a letter "o", one has to
press 666, i.e. press number key 6 three times because "o" is the
third letter on key 6. To get a number 6, one has to press 6666,
i.e. press number key 6 for four times, because 6 is the fourth
symbol on key 6. It is very cumbersome.
[0007] The manual input device becomes increasingly the component
that resists being miniaturized. A Go-type keyboard is a step
forward in relieving the manual input device problem for handheld
computers. But the Go-type keyboard is significantly larger than
the Palm handheld computer and keys on the keyboard are
significantly smaller when in use than the traditional keyboard.
The Palm folding keyboard is smaller. A Palm folding keyboard is
small enough to fit in a big pocket when not in use. It is only a
little bit longer and wider than a Palm.TM. computer and about
twice as thick as a Palm.TM.. When the keyboard is extended and
ready to use, it has a keyboard the size of a normal desktop
computer keyboard. The keys on the keyboard are normal size and the
travel distance of keys when depressed is about the same as the
keys on a notebook computer keyboard or about half of that as the
keys on a desktop computer keyboard. A Palm folding keyboard is
significantly smaller when folded than a full-size desktop computer
keyboard, i.e. about 1/4 of a regular keyboard. But it is still too
big to carry with a Palm simultaneously in a shirt pocket. A Palm
folding keyboard is significantly more expensive than a regular
desktop keyboard, about $100 for a Palm folding keyboard versus $15
or less for a regular desktop keyboard.
[0008] Most of the desktop keyboards, Palm folding keyboards or
even the miniaturized keyboards have plastic keycaps. Under those
keycaps, there are springs or similar resilient material, which
will spring back to it original position when not pressed. When a
user hits a key, the spring will be depressed, a rod underneath the
keycap or other mechanic component will hit a plastic electrical
switch, and the switch closes an electric circuit. When the finger
releases the keycap, the string under the keycap returns to neutral
position, so the plastic electric switch opens again. The open or
close of such an electric switch will generate a signal, which may
or may not be forwarded to an input driver. Eventually, the signal
will be forwarded to a dedicated microprocessor or a Central
Processing Unit (CPU) and be processed as the corresponding
keystroke represented by the keycap on the keyboard. The mechanical
movement of the keycaps on the keyboard is transformed into
electrical signal and processed by CPU as an input keystroke. The
sizes of those keycaps on a keyboard are mostly determined by the
sizes of human fingers. To make the keycaps fit the fingers, the
size of the keycaps cannot be too small, otherwise, the finger will
not be able move and hit the correct keys all the time. Smaller
keycaps, as in the Go-type keyboard are not as comfortable or
accurate as those full-size keycaps as in the desktop keyboard or
Palm folding keyboard. If the keycaps are too big, then the fingers
have to travel more to hit a particular keycap. That increases
chances of hitting a wrong, adjacent keycap. That also may increase
hand fatigue. Some keyboard manufacturers have recognized such
problems and have developed smaller keyboards for persons with
smaller hands and fingers, such as children.
[0009] Touch screens are used increasingly common. On a screen,
part of the screen may be shown as a simulated desktop keyboard.
When a human finger touches a location inside a simulated key, the
touch screen generates a signal representing the coordinates of the
hit location. A program, such as keyboard driver, interprets such a
signal as a keystroke, as if one typed the same key on a regular
keyboard. Those touch screen keyboards are usually in vertical
planes, as they are usually the bottom portions of vertical
displaying screens. The touch screen eliminates the need of
additional keyboards, makes the system of compact and integrated
with fewer mechanical accessories. A touch screen is also easier to
clean or sanitize, where public health is of concern. But touch
screens are intended for inputting minimum amount of information,
such as selecting an item from a list or inputting a person's name,
rather than heavy-duty keyboards, such as for taking notes or
writing office memoranda. There are touch screens displaying on
near horizontal plans such in some instrument panels in control
rooms in many manufacturing plants. There, simulated keyboards on a
horizontal plane may be used occasionally as if they are desktop
keyboards.
BRIEF SUMMARY OF THE INVENTION
[0010] The present invention takes advantage of certain features of
manual input devices, such as a typical keyboard, and minimizes the
sizes of them. The keyless keyboard in the present invention does
not use any keycaps. The present invention may have a film of
membrane switches with printed circuits or touch screens. The film
may have a plurality of areas representing keys. The film may be
folded many times to reduce the size. A connector connects the
keyboard to electronic devices, such as PDAs, cellular phones or
desktop computers.
BRIEF DESCRIPTION OF DRAWINGS
[0011] A better understanding of the invention can be had when the
following detailed description of the preferred embodiments is
considered in conjunction with the following drawings, in
which:
[0012] FIG. 1 is a general overview of the keyless folding keyboard
in an unfolded position for normal use.
[0013] FIG. 2 is a general overview of the keyless folding keyboard
in a folded position for storage.
[0014] FIG. 3 is a general overview of another embodiment where the
keyless folding keyboard is integrated with an electronic gadget,
such as a PDA or a cellular phone in folded position.
[0015] FIG. 4 is general overview of the embodiment shown in FIG. 3
in an unfolded position for typing.
[0016] FIG. 5 is typing finger gloves for use when the keyless
folding keyboard is made of touch screen.
[0017] FIG. 6 shows both hands with finger gloves on for
typing.
[0018] FIGS. 7 and 8 show two key arrangements of the keyless
keyboard.
[0019] The above drawings are not to scale and for illustrative
purpose only.
DETAILED DESCRIPTION OF THE INVENTION
[0020] One of the most obvious features of present invention, a
keyless keyboard, is that the keyless keyboard does not have any
"keys" or keycaps. The keyless keyboard has no apparent moving
parts. The present inventor discovers that keycaps are not
essential for a keyboard to function as a data input device.
Keycaps may be a tradition passed down to modern computer keyboards
from their ancestors, i.e. the mechanical typewriters. Keycaps help
novel keyboard users or a new user of a particular keyboard to
locate the correct keys. They may help keyboard user to locate the
home locations of the fingers before typing. They may also provide
feedback to a user when a particular key is pressed. But almost all
of the above functions of keycaps are either unnecessary or can be
had through other devices or methods. With the removal of keycaps,
the keyless keyboard in the current invention can be made much
smaller than traditional desktop keyboard, while retains the basic
function as a manual data input device for computer or other
electronic gadgets. When new material, such as touch screen is
used, the keyless keyboard in the present invention may have more
functions than a traditional desktop keyboard.
[0021] Due to the size of the keyless keyboard in the present
invention and its simplicity, such a keyless keyboard can be very
personalized and can be almost disposable. The surface of a keyless
keyboard is essentially flat and smooth. It can be easily cleaned
and sanitized, when necessary. But most likely, the cleaning is not
necessary, because of any person can keep and carry his own
keyboard wherever he goes. There is no need to use or share a
public keyboard. A user can just plug-in his own keyless keyboard
using the standard keyboard socket/connector in a public computer
or electronic device, type in the necessary information, then
unplug the keyless keyboard. A next user can similarly use his own
keyless keyboard. A public service provider may also make the
disposable keyless keyboard available for persons who forget to
carry their personal keyboards.
[0022] In one embodiment of the present invention, standard
membrane switches are used. Generally, standard membrane switches
are made of three layers: a top layer with printed circuit on the
underside of the top layer, a middle insulation layer, and a bottom
layer with a printed circuit on the upper-side of the bottom layer.
There are holes/windows in the middle insulation layer, through
which the printed circuit on the top layer and the printed circuit
on the bottom layer may contact each other. When the top and bottom
printed circuit contact to one another, they form a short circuit
and generate a keystroke signal. Normally, they are separated by
the middle insulation layer and do not contact each other, so the
circuit is open. A user's finger hits a switch on the keyless
keyboard, i.e. an area where there is a window/hole, the top layer
is pressed downward temporarily and contacts the bottom layer, a
short circuit is formed and a signal generated. When the finger is
lifted, the top layer returns to its normal position, the circuit
is open again. Because the all the layers are very thin, the
deformation caused by human fingers during typing are very small,
the metal and plastic top layer is flexible and resilient enough to
endure many deforming/restoring cycles. The human fingers are
softer and having larger surface areas than the impacting rubber
rods under the traditional desktop keyboards, so the membrane
switches in the current invention have similar useful life
expectancy as those more traditional keyboards. But a user may not
use the keyless keyboard in the present invention for its full
useful life, due to the disposability.
[0023] In one embodiment of the present invention, a keyless
keyboard 10, as shown in FIG. 1, has several components. There is a
housing 20, containing signal processing electronics. At one end of
the housing, there is a standard keyboard connector and connector
cable 36. This connector connects the keyless keyboard to
computers, PDAs or other electronic devices where a keyboard is a
useful input device. The connector 36 may be in a numerous other
format, such as USB connector, serial connect or device specific
connector, such as specifically for Palm Pilot, Nokia cellular
phone etc. The housing 20 may contain the standard electronics as
in a regular desktop keyboard if they are desired. Or the housing
may contain no electronics, if the keyless keyboard is specifically
and exclusively used for a Palm Pilot PDA. All the
signal-processing functions may be performed inside the Palm Pilot.
The connected electronic device may provide the necessary power to
the keyboard through the keyboard connector 36.
[0024] The housing 20 is electrically connected to key panels 22,
24, 26, 28 and 30. Each key panel may have at lease one column and
a plurality of rows. The intersection of a column and a row forms a
cell. Each cell contains a membrane switch. There is a folding line
between key panels. Along the folding lines, the panels can be
folded and stack together for storage, or unfolded and extended
flat on a flat surface for typing. The area around a folding line
is generally thinner and more flexible than the other areas on a
key panel. Between the panel 24 and 26, there may be a split 34 on
the lower porting of the folding line and folding line 32 on the
top. Near the folding line 32, the key panel can be pushed up out
of the flat surface plane. The housing 20, key panels 22 and 24 can
be split and arranged at an angle with respect to panels 26 and 28.
This way, the key panels are arranged in a more natural way to
accommodate the natural posture of user's two hands. The angle may
be adjusted. For panels 22, 24, 26 and 28 to remain flat on the
flat surface, folding line 32 is pushed up a little bit out of the
flat surface plane. All the electric connection between panels 22,
24 and 26, 28 are embedded and through folding line 32. Panel 30
may be an add-on panel, connected to panel 28 near the top row. The
electric connection between housing 20 and panel 22, panels 22 and
24, panels 26 and 28 may be confined to only the top row, as
between panels 24 and 26, or may be spread in all rows.
[0025] FIGS. 2A and 2B show the keyless keyboard in a folded
condition and a folding condition for storage. The panels 22, 24,
26 and 28 are folded together towards the housing 20. The connector
36 is withdrawn into the housing 20. Due the more flexible and
thinner constructions of the folding lines in between panels, all
the layers in the panels are in flat, neutral conditions, without
pressure. In one embodiment, the folded keyless keyboard has a
dimension of about 90 mm long, 75 mm wide and 15 mm thick, when the
membrane switch is about 3 mm thick. The thickness arises mainly
from the structural backing of the bottom layer of the membrane
switch. In another implementation, the keyless keyboard is thinner,
only about 4 mm thick, using 1 mm-thick or less membrane switches
including backing. This is about as thick as to stack four plastic
credit cards together. If the structural back is not of a concern,
i.e. the structural back is not installed, the key panel can be as
thin as 0.2 mm or less. The keyless keyboard is less than 1 mm
thick in folded position. The keyless keyboard is smaller than a
Palm IIIxe, which is about 120 mm long, 80 mm wide and 16 mm thick,
and smaller than a foldable Palm Keyboard, which is about 130 mm
long, 90 mm wide and 22 mm thick. At 15 mm, 4 mm or thinner, this
keyless keyboard can be easily kept in one's wallet as an
independent electronic gadget, or added onto and integrated with
any small electronic devices.
[0026] FIGS. 3 and 4 show another embodiment of the present
invention, a keyless keyboard 50 integrated with an electronic
gadget 40, such as a cellular phone or a PDA. The electronic gadget
40 may have the regular features of a cellular phone, such as an
earphone 42, a display 44, a microphone 48 and a connector slot 52.
On the back of the electronic gadget 40, a keyless keyboard 50 is
attached. FIG. 4 shows the electronic gadget 40 with the keyless
keyboard 50 unfolded. The keyless keyboard 50 has similar key
panels as in keyless keyboard 10 shown in FIG. 1.
[0027] To increase the efficiency and accuracy of typing, a user
may also wear finger gloves with keydots as shown in FIGS. 5 and 6
while using the keyless keyboard or attach keydots directly onto
fingers. The finger glove may have a glove 60, made of any kinds of
flexible fabric, plastic or elastic films. At the underside of the
closed end, a small dot or keydots 62 is attached to the glove 60.
This keydots 62 may be made of any kinds of rubber or plastic or
other materials that are less flexible or harder than the pad of a
user's finger. These keydots 62 may hit the key area during typing,
before a user's finger hit those areas. The harder and
better-defined shapes of the keydots 62 may have more precise hits
on the key areas and have a better close/open switch response from
the membrane switches. FIG. 6 shows a user with finger gloves 60 on
all fingers when using a keyless keyboard. The finger gloves may be
made of very thin material so they will not interfere with a user's
other activities, such as writing with a pen or stylus, holding a
cup of coffee etc. The keydots 62 may also be made for single use.
A keydot 62, made from plastic or rubber may take the shape of a
small disk, such a medicine tablet, where one side of the tablet
has adhesive and can be adhered to a user's finger temporarily and
the other side of the tablet is smooth. A user can adhere the small
dot 62 on the desired fingers, for example the pinkies and thumbs
when typing on a keyless keyboard. The user can remove the small
dot 62 when finishing typing.
[0028] FIGS. 7 and 8 show some illustrative arrangement of key
areas on the keyless keyboard. The arrangements in FIG. 7 and FIG.
8 can be switched from one to another by toggling the "mode" key.
The arrangement in FIG. 7 is essentially the standard QWERT
keyboard. The differences include that all the key areas are
arranged in straight columns and rows. The staggered key
arrangement is probably another artifact from old mechanical
typewriter. There is no real need for staggered key arrangement. It
is easier for a user's finger to move in a straight motion, up or
down, left or right. There are folding lines in between key panels,
for example between the column 2wsx and 3edc. In the embodiment
shown in FIGS. 7 and 8, each key panel has three columns of key
areas. Each key panel may also have only two or even only one
columns, depending on the trade-off between the width and thickness
of the resulting keyboard. The fewer columns in a key panel reduce
the width of a folded keyboard, but increase the number of panels
and increase the thickness of the folded keyboard. There is a split
between 5tgb and 6yhn, which separate the left-hand key areas and
the right-hand key areas. The split between 5tgb and 6yhn makes is
possible to arrange the two panels in an angle respect to one
another to fit the natural posture of left and right hands during
typing.
[0029] The end user can rearrange all the keys, through
reprogramming the electronic processing device in the housing 20,
or reprogramming the keyboard driver in a computer or PDA if no
electronic processing device is installed in the housing 20. Those
keys along the outer left, bottom and right edges do not change
when "mode" is toggled on or off. FIG. 8 shows an illustrative
arrangement after "mode" is toggled. There can be more than one
"mode" key on the keyless keyboard, such that more unique keys or
function keys can be made available.
[0030] The keyless keyboard 10 can also be made from touch screens.
Instead of using membrane switches, touch screens can be used to
combine the input device (keyboard) and display device (monitor or
screen) together. Each key panel, as shown in FIG. 1, may be a
touch screen, 22, 24, 26 and 28. Screens 22 and 24, 26 and 28 are
mechanically connected together at the folding lines, such that
they can be folded along the folding line for storage and unfolded
to lay flat on a flat surface for use. All the screens, 22, 24, 26
and 28 are electronically connected at the top row. There are
folding lines near the folding line 32 on key areas of number key
"5" and number key "6." When the left panels and the right panels
are split along the separate line 34, the corners of "5" and "6"
can flip upwards to left panels and right panels flat.
[0031] Each key panel may have three main layers: on the top is a
touch sensitive screen, such as the common resistance touch screen;
in the middle is an LCD and on the bottom is a structural backing.
The touch screen layer and the LCD layer may have several
sub-layers, for example, the LCD may have several light
conditioning layers on the main liquid crystal layer. But even with
all those layers, a single key panel may still be less than 1 mm
thick.
[0032] When the keyless keyboard is integrated to an electronic
gadget, such as in FIGS. 3 and 4, the key panels 52, 54, 56 and 57
all have two functions: as display screen and keyboard input. They
can be used as an extended screen of the standard screen on the top
surface 44 of the electronic gadget. They can also be used as
simulated keyless keyboard for input, not only as a keyboard, but
also as a pointing device, as in a touch pad. Both the display
function and the input function can be served simultaneously. Due
to the size of the touch screens, the resulting keyless
keyboard/display can be even thinner than the membrane switch type
of the keyless keyboard. When touch screen is used and integrated
to an electronic gadget, the touch screen not only provides a
convenient way for manual inputting data, it also extended the
display screen significantly. When the keyless keyboard contains
four key panels, the key panels increase the display screen four
times the original display screen on the top surface of the
electronic gadget, making the electronic gadget much more useful
and more appealing for displaying pictures, especially motion
pictures. When the 4-key-panel keyboard is unfolded, the screen is
about 90 mm high and 216 mm wide, about 250.times.550 pixels, very
close to the amount of pixels on a regular or widescreen TV.
[0033] When touch screen is used to implement the present
invention, a powerful small electronic gadget can become a real
handheld personal computer. It can have all the amenities a laptop
or even a desktop personal computer can provide, such as a large
screen, CD quality audio, and a full size keyboard, but still be
small enough to be held in one's hand or pocket.
[0034] The keyless keyboard in the present invention may also be
expanded indefinitely by adding extra key panels, as shown in FIG.
1, for example, a dedicated numerical keypad may be added to the
keyless keyboard. Key panel 30 may be connected to key panel 28 on
the top row of key panel 28, through exposed printed circuit board.
Key panel 30 may be attached on key panel 28 mechanically by
adhesive.
[0035] The embodiments of the current invention provides large-size
keyboard or display screen, while still keep the keyboard or
display screen small enough to fit in a wallet. The embodiments of
the current invention greatly improve the functionality of small
electronic devices.
[0036] While the preferred embodiment of the invention has been
illustrated and described, it will be appreciated that various
changes can be made therein without departing from the spirit and
scope of the invention.
* * * * *