U.S. patent application number 09/790221 was filed with the patent office on 2001-09-20 for case for a modular tablet computer system.
Invention is credited to Armitage, David L., Greenwald, Jerry, Kapushion, Joe, Keen, Jim, Leander, Randy, Roecker, David.
Application Number | 20010022719 09/790221 |
Document ID | / |
Family ID | 22431250 |
Filed Date | 2001-09-20 |
United States Patent
Application |
20010022719 |
Kind Code |
A1 |
Armitage, David L. ; et
al. |
September 20, 2001 |
Case for a modular tablet computer system
Abstract
A computer housing or case contains computer system components
including a display unit, a processor, and a computer power supply
unit. One or more handles are positioned at a side of the case to
allow a user to hold the encased computer system while viewing the
display. A case has a support interface structure to hold the case
steady in an upright position. The support interface structure of
the case mates with a complimentary support interface in the
weight-supporting base unit and mates with guides to align a power
supply port in the case to contact a power supply port in the base
unit. A base unit has a keyboard guide to receive a keyboard by
lifting the keyboard above a support surface. A modular computer
system comprises a tablet computer, a base unit, and a remote
keyboard. A first infrared communication device couples the tablet
computer to the remote keyboard and other input peripherals. A
second infrared communication device couples the tablet computer to
a remote printer. A radio frequency network adapter couples the
tablet computer to the base unit, which provides additional
communications to an external communications network.
Inventors: |
Armitage, David L.; (Golden,
CO) ; Roecker, David; (Denver, CO) ;
Greenwald, Jerry; (Lakewood, CO) ; Kapushion,
Joe; (Broomfield, CO) ; Keen, Jim; (Denver,
CO) ; Leander, Randy; (Littleton, CO) |
Correspondence
Address: |
Stuart T. Langley, Esq.
Hogan & Hartson, LLP
Suite 1500
1200 17th Street
Denver
CO
80202
US
|
Family ID: |
22431250 |
Appl. No.: |
09/790221 |
Filed: |
February 21, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
09790221 |
Feb 21, 2001 |
|
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|
09127662 |
Jul 31, 1998 |
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Current U.S.
Class: |
361/679.17 ;
361/679.21 |
Current CPC
Class: |
G06F 1/16 20130101; G06F
1/1632 20130101; G06F 1/166 20130101; G06F 2200/1631 20130101; G06F
1/1698 20130101; G06F 1/1626 20130101 |
Class at
Publication: |
361/681 |
International
Class: |
G06F 001/16 |
Claims
What is claimed is:
1. A housing for containing a computer system having a display
unit, a processor unit, and a power supply unit therein, said
display unit being viewable by a user, said housing comprising: a
case including a front face, an opposing back face, and a first
side having a first side surface and being positioned between said
opposing faces, said front face having a first side surface
positioned near said first side; said front face having a
see-through portion that allows said display unit to be viewable
from outside said case; and a first handle including said first
side surface, said first front surface, and a first grip positioned
on said back face of said case near said first side; wherein said
first handle is graspable by a first hand of a user such that at
least one finger of said first hand is capable of engaging said
first grip, the palm of said first hand is capable of contacting
said first side surface, and said first hand is capable of
contacting said first front surface while said user can view said
display unit through said see-through portion of said case.
2. The housing of claim 1 further comprising: said case further
including a second side opposing said first side, said second side
having a second side surface and being positioned between said
front face and said back face, said front face having a second
front surface positioned near said second side; and a second handle
including said second side surface, said second front surface, and
a second grip positioned on said back face of said case near said
second side; wherein said second handle is graspable by a second
hand of said user such that at least one finger of said second hand
is capable of engaging said second grip, the palm of said second
hand is capable of contacting said second side surface, and said
second hand is capable of contacting said second front surface
while said user can view said display unit through said see-through
portion of said case.
3. The housing of claim 1 wherein said first grip is nonplanar with
said back face.
4. The housing of claim 1 wherein said first grip comprises a
recess formed in said back face substantially parallel to said
first side of said case.
5. The housing of claim 1 wherein said first grip comprises a grip
structure protruding from said back face near said first side of
said case.
6. The housing of claim 1 wherein said case has a top side and a
bottom side, and said first grip comprises a recess formed into
said back face from said top side to said bottom side substantially
parallel along the entire length of said first side.
7. The housing of claim 1 wherein said first grip comprises a hole
through said case capable of receiving said at least one finger to
allow said first hand to wrap completely around said handle.
8. The housing of claim 1 further comprising a support structure
operably attached to said case that holds said case upright on a
support surface.
9. The housing of claim 8 wherein said support structure is a stand
disposed in a stand recess in said back panel that extends from
said back panel to support said case.
10. The housing of claim 8 wherein said support structure folds
into a recess in said back panel to form a portion of said first
grip in said back panel.
11. A housing for containing a computer system having a display
unit, a processor unit, and a computer power supply unit therein
and for engaging a weight-supporting base unit having a base unit
guide and a base power supply port, said display unit being
viewable by a user, said housing comprising: a case having opposing
front and back panels; said front panel having a see-through
portion that allows said display unit to be viewable from outside
said case; a case power supply port formed in said case positioned
to engage an electrical lead coupled to said computer power supply
unit; an interface structure formed in said case, wherein said
interface structure is capable of detachably engaging said case to
said weight-supporting base unit and holding said case steady in an
upright position; and a case guide positioned on said interface
structure, wherein said case guide is capable of complementarily
engaging said base unit guide to align said case power supply port
with said base power supply port.
12. The housing of claim 11 wherein said interface structure
comprises a tab formed in said case, wherein said tab is capable of
mating into a slot formed in said weight-supporting base unit.
13. The housing of claim 11 wherein said case guide is a recessed
area having a lip on one of said panels that is capable of
complementarily sliding against a support tab in said
weight-supporting base unit to horizontally align said case power
supply port to correspond with said base power supply port.
14. The housing of claim 11 wherein said case guide is a recessed
structure formed in said back panel being capable of
complementarily engaging said base unit guide that protrudes from
said weight-supporting base unit.
15. The housing of claim 11 wherein said case guide is a protruding
structure formed in said back panel being capable of
complementarily engaging said base unit guide that is recessed into
said weight-supporting base unit.
16. Apparatus for housing and supporting a computer system having a
display unit, a processor unit, and a computer power supply unit
therein, said display unit being viewable by a user, said housing
comprising: a case having opposing front and back panels; said
front panel having a see-through portion that allows said display
unit to be viewable from outside said case; a case power supply
port formed in said case and positioned to engage a computer power
lead coupled to said computer power supply unit; a case interface
structure disposed on said case; a weight-supporting base unit; a
base power supply port formed in said weight-supporting base unit;
and a base interface structure disposed on said weight-supporting
base unit and being structurally complementary with said case
interface structure to detachably engage said case interface
structure; wherein said case is held steady in an upright position
and at least one of said interface structures includes an alignment
guide to align said case power supply port to correspond with said
base power supply port.
17. The apparatus of claim 16 wherein said case interface structure
forms a tab that mates into a slot formed by said base interface
structure.
18. The apparatus of claim 16 wherein said computer power supply
port is positioned to engage a computer power lead coupled to said
computer power supply unit, said base power supply port is
positioned to engage a base power lead coupled to said base power
supply unit, and said alignment guide to align said computer power
lead in contact with said base power lead.
19. A base unit for holding a computer system steady in an upright
position, said computer system having a computer interface
structure and a computer power supply port formed therein, said
base unit comprising: a bottom portion steadily positioned on a
support surface; a top surface operably attached to said bottom
portion; a weight-supporting interface structure operably attached
to said edge and forming a slot being capable of detachably
engaging said computer system; an alignment guide disposed on said
weight supporting interface structure and being complementary to
said computer interface structure; and a base power supply port
formed in said weight-supporting interface structure, said
alignment guide being capable of aligning said base power supply
port to correspond with said computer power supply port.
20. The base unit of claim 19 further comprising a receptacle that
receives a keyboard, said weight supporting interface structure
being capable of holding said computer system case above said
receptacle.
21. The base unit of claim 19 further comprising a receptacle that
receives a keyboard, said weight supporting interface structure
being capable of holding said computer system case below said
receptacle.
22. A base unit for holding a keyboard above a support surface,
said keyboard having a side rail including a detent positioned on
said side rail separate, said base unit comprising: a top surface;
a side portion extending downward from said top surface to said
support surface; a keyboard guide disposed on said side portion
including a beveled end, a nipple, and a slide portion
therebetween; said beveled end capable of receiving and lifting
said side rail of said keyboard onto said slide portion of said
keyboard guide when the front of said keyboard is pushed into said
base unit along said support; said nipple being capable of
receiving said detent of said side rail to detachingly engage said
keyboard beneath said top surface and above said support surface.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention pertains generally to electrical
computers and more particularly to modular tablet computer systems
and cases for such systems.
[0003] 2. Description of Related Art
[0004] It is common for computer industry pundits to invoke the
phrase "ubiquitous computing". Such predictions involve a paradigm
where computer use is, at least in a consumer's mind, equivalent to
and no less common than telephone or television use. The image of a
computer as a common home "appliance" has driven a multitude of
marketing campaigns, but computers have yet to be as accepted into
consumers' kitchens and living rooms as appliances. Even standard
laptop computers fail to satisfy the convenience and usability
requirements of a large majority of consumers. Likewise, based
computing solutions have not yet overcome the inertia surrounding
the television's role as a passive entertainment device.
[0005] Among the problems with prior attempts to introduce a
computer "appliance" are cost, form factor/configuration issues,
reliability, complexity, and application choices. Computers have
traditionally been priced for a market segment seeking high
performance and extensive hardware and software features. For
example, desktop computer prices have only recently fallen below
the $1000 mark, and such prices often do not include all necessary
hardware, such as a monitor, or software, such as word-processing
or personal finance applications. As such, need exists to provide a
low-cost computer solution that satisfies a specific
"appliance"-like need for consumers.
[0006] Significant problems with many current computer offerings
include unwieldy system configurations and inconvenient,
uncomfortable form factors, which may be defined as the size,
shape, weight, and other physical features in the user-oriented
portion of the computer system. Desktop computers are typically
heavy multi-unit, cable-connected systems that occupy a significant
portion of a desktop. Likewise, even laptop computers typically
require a flat and steady support surface and cables for connecting
to a telephone line, a printer, an external monitor, a full-size
keyboard, or a mouse. Such approaches to extensibility, modularity,
and interconnectivity sacrifice the convenience and mobility
desirable in a home or office computer appliance. Consequently, a
need exists for system configurations and form factors that
overcome these limitations. Preferably, such devices are highly
mobile and ergonomically designed to be operated on users' laps or
other variable work surfaces.
[0007] Reliability is crucial to a computer's acceptance as a home
appliance. For instance, refrigerators and telephones typically
perform reliably for years with little or no maintenance. In
contrast, computers are famous for "crashing", for difficult
installations and repairs, and for immediate obsolescence.
Furthermore, replacing or upgrading a computer is typically an
expensive and time-consuming proposition. Moreover, even less
robust appliances, like toasters, are priced to make replacement of
the entire appliance a reasonable resolution to a maintenance
problem. As such, a need exists for a computer appliance that
limits reliability problems, allows simple, inexpensive, and
reliable upgrades, and contains low-cost components to allow
cost-effective replacement of the system and/or components when
necessary.
[0008] Complexity issues concerning a computer appliance are also
associated with reliability. Modern personal computers typically
boast various upgradable hardware and software features that may
require considerable effort by the consumer to implement. The costs
of such extensibility include incompatibilities among hardware and
software components, improper installations, and user frustration.
Accordingly, a need exists for a computer appliance that performs
its function and provides extensibility with minimal consumer
involvement.
[0009] Part of the tension between the computer appliance concept
and the current computer paradigm is caused by the traditional
notion of having a computer be everything a user could want,
including, for example, a business computing platform, a personal
finance platform, a word processing platform, a graphics and design
platform, a 3-D gaming platform, and so on. Such breadth of
application amplifies each of the previously discussed problems.
System features required to perform one set of functions are often
unnecessary to perform another set of functions. In contrast, the
appliance concept avoids such an expansive purpose for computer
appliance use. Computer appliances may be designed to perform a
focused set of functions with simplicity, reliability, and
convenience at a reasonable cost. As such, a need exists for a
computer appliance satisfying a common and focused set of consumer
needs.
BRIEF SUMMARY OF THE INVENTION
[0010] It is therefore an object of the present invention to
provide a modular computer appliance that has an ergonomically
efficient form factor and configuration and provides access to a
communications network.
[0011] It is another object of the present invention to provide a
housing for a computer system that provides an ergonomic structure
and facilitates mobility of the system.
[0012] It is another object of the present invention to provide a
modular computer system having wireless communication interfaces to
a base unit or other peripheral device.
[0013] Additional objects, advantages, and novel features of the
invention are set forth in the description that follows and will
become more apparent to those skilled in the art when taken in
conjunction with the accompanying drawings. The objects and
advantages of the invention may be realized and attained by means
of the instrumentalities and accommodations particularly pointed
out in the appended claims.
[0014] An improved modular computer apparatus in accordance with
the present invention overcomes the disadvantages and limitations
identified in the related art. A focused selection of features and
components provides a cost-effective computer appliance. The
roughly tablet-shaped form factor and wireless configuration
greatly enhances usability. The sealed housing, combined with
minimal maintenance features and nearly automatic upgrades, greatly
improve reliability and decrease complexity. A computer appliance
is directed to provide a set of focused applications for home and
office coupled with wireless communication capabilities to a
communications network.
[0015] An apparatus in accordance with the present invention
comprises a housing for a modular computer appliance, a base unit
capable of providing power to the computer system and capable of
holding the computer appliance steady in an upright position, and a
modular keyboard storable in the base unit. A tablet computer is
housed in a case having at least one handle to allow a user to hold
the computer system while viewing a display screen therein. A base
unit has a keyboard guide to raise the keyboard above a support
surface when inserted into the base unit. A keyboard guide engages
the keyboard, when inserted, to provide resistance against
unintended removal. A computer appliance provides wireless
communications with the base unit and other peripheral devices. A
base unit provides communication between the computer appliance and
an external communications network.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 depicts a front perspective view of a computer system
in accordance with the present invention.
[0017] FIG. 2 depicts a rear perspective view of a computer system
in accordance with the present invention
[0018] FIG. 3 is a system diagram of a tablet computer system in
accordance with the present invention.
[0019] FIG. 4 is a system diagram of the electronic components of a
base unit.
[0020] FIG. 5 depicts a perspective view of a base unit with a
keyboard removed from its receptacle.
[0021] FIG. 6 depicts a perspective front view of a computer tablet
separate from a base unit.
[0022] FIG. 7 depicts a top view of a base unit in accordance with
the present invention.
[0023] FIG. 8 depicts a front view of an alternate tablet computer
embodiment in accordance with the present invention.
[0024] FIG. 9 depicts a back view of an alternate tablet computer
embodiment in accordance with the present invention.
[0025] FIG. 10 depicts a front, bottom view of an alternate tablet
computer embodiment in accordance with the present invention.
[0026] FIG. 11 depicts a back, bottom view of an alternate tablet
computer embodiment in accordance with the present invention, with
the adapter module removed.
[0027] FIG. 12 depicts a back view of an alternate tablet computer
embodiment in accordance with the present invention with a stand
extended to support the tablet computer on a support surface.
[0028] FIG. 13 depicts a top, front view of an alternate base unit
embodiment in accordance with the present invention, with a
keyboard inserted in a keyboard receptacle.
[0029] FIG. 14 depicts a bottom, front view of an alternate base
union embodiment in accordance with the present invention, with a
keyboard removed from the keyboard receptacle.
[0030] FIG. 15A depicts a front view of a keyboard in accordance
with the present invention.
[0031] FIG. 15B depicts a bottom view of a keyboard in accordance
with the present invention.
[0032] FIG. 16 depicts an alternate tablet computer embodiment in
accordance with the present invention being supported by the
mini-stands extended from the back panel of the tablet computer
system.
[0033] FIG. 17 depicts an alternate system embodiment of the tablet
computer system in accordance with the present invention.
[0034] FIGS. 18A, 18B, and 18C depict an alternate embodiment of
the present invention adapted to mounting below a horizontal
surface.
[0035] FIGS. 19A, 19B, and 19C depict an alternate embodiment of
the present invention adapted to mounting upon or against a
vertical surface.
DETAILED DESCRIPTION OF THE INVENTION
[0036] FIG. 1 illustrates a modular tablet computer, shown
generally at 100, comprising tablet computer system 102, cradle
unit or base unit 104, and keyboard unit 106. Tablet computer
system 102, enclosed by a tablet-shaped case, is held steady in an
upright position as it rests in support interface 110. A first
portion of support interface 110 is formed in the lower edge of the
case (called the "case support interface" or the "tablet support
interface"), and a second portion of support interface 110 is
formed in the base unit (called the "base support interface"). The
two portions are complementary and mate to form a firm support
holding tablet computer system 102 steady in an upright position.
In an exemplary embodiment of the present invention, the case
support interface forms a "tab" to mate into the "slot" of the base
support interface. Although tablet computer system 102 in FIG. 1
illustrates a generally rectangular box or tablet, other shapes and
aspect ratios are contemplated in accordance with the present
invention, including square, circular, triangular boxes, and other
shapes supporting a viewable display unit.
[0037] In the illustrated embodiment, the case is partially formed
from a plastic casing comparable in composition to the plastic of
typical personal computers. In an alternate embodiment, however,
the case is formed, at least in part, from a softer foam rubber or
plastic, such as that used in automobile dashboards, preferably
with a hard plastic internal ribbing or frame. The softer casing
provides adequate structural support while absorbing more impact
(from a drop from a table, for example) than a typical hard plastic
casing. The softer foam also provides improved comfort for a user
holding the tablet in his or her hand or lap.
[0038] Tablet computer system 102 may be described as having front
panel or face 124, back panel or face (200 in FIG. 2) top side 126,
bottom side 128, left side 132, and right side 130. The descriptor
"horizontal" refers to a dimension directed across front panel 124
from left side 132 to right side 130. The descriptor "vertical"
refers to a dimension directed across front panel 124 from bottom
side 128 to top side 126. The descriptor "axial" refers to a
dimension directed normal to front panel 124. A "horizontal axis"
is defined to extend horizontally across the vertical center of
tablet computer system 102. A "vertical axis" is defined to extend
vertically across the horizontal center of the tablet computer
system 102.
[0039] The case is also substantially sealed to resist liquid and
dust from entering the case. For example, display screen 118 is
operably attached to the case by a gasket that substantially
surrounds the entire perimeter of the viewable display screen. The
gasket seals the display screen/case junction and provides improved
shock resistance compared to other display screen cushioning that
is merely positioned at the corners of the display screen. In
addition, speakers 120a and 120b comprise speaker cones surrounded
by sanaprene or other equivalent material. The cones themselves may
be made of paper, mylar, or other flexible (i.e., vibratable)
material. This combination resists foreign materials from
penetrating through the speaker holes into the case to contact the
internal system components. Microphone 122 possesses a similar
configuration. Each infrared communication port 112 is covered by a
translucent tinted plastic cap, which is heat staked to the port to
integrally cap the port, thereby preventing ingress of foreign
materials.
[0040] Furthermore, the case preferably comprises two main panel
sections (front and back) that are brought together to enclose the
internal tablet computer system components. The perimeter of the
tablet computer is formed by the engagement of these panel
sections, which forms a labyrinth seal to resist penetration by
foreign materials. In addition, other ports, such as buttons
apertures (e.g., 150, 152, 154, and 156), AC adapter port 220 and
On/Off switch 222 in FIG. 2, and power supply port 602 in FIG. 6
are sealed by gaskets to resist penetration by foreign
materials.
[0041] Infrared communications port 112 is an aperture positioned
on the top side 126 of tablet computer system 102 to communicate
with a printer or other peripheral located substantially in the
line of sight therewith, particularly peripheral devices lacking an
unobscured line-of-sight to an infrared port positioned on the
front panel 124 of tablet computer system 102, such as second
infrared port 114. A preferred infrared communications interface
complies with the IrDA Serial Infrared Data Link Standard
Specifications, available from the Infrared Data Association (IrDA)
web site (www.irda.com). Other wireless communication devices, such
as radio frequency devices, may be also used to communicate with
remote peripherals within the scope of the present invention.
[0042] A second infrared port 114 is positioned in the lower
portion of front panel 124 to communicate with keyboard 106 when
keyboard 106 is removed from base unit 104 and tablet computer
system 102 is held in an upright position, as shown. A
corresponding infrared port (see, for example, infrared port 1506
in FIG. 15) is positioned on keyboard 106 to communicate with
second infrared port 114 as a user types on keyboard 106 and views
display unit 118. Other wireless communication devices, such as
radio frequency devices, may be also used to communicate with a
remote keyboard or other input device (such as a mouse or touch
pad) within the scope of the present invention.
[0043] Dual stereo speakers 120a and 120b are positioned on either
side of display unit 118 on tablet computer system 102. Microphone
122 is positioned at the top of front panel 124 to receive audio
input from a user. Button 150 is a two-position rocker switch for
controlling the brightness of the screen. Button 152 is a
two-position rocker switch for controlling the volume of sound
output through the speakers 102a and 120b.
[0044] Button 154 is a pushbutton that puts tablet computer system
102 in and out of a "sleep" mode, which powers down portions of the
computer system to conserve power. In an exemplary embodiment of
the present invention, depressing button 154 generates an interrupt
received by a microprocessor of table computer system 102, which
causes the power management system to toggle the "sleep" mode of
the system. Another embodiment causes a Windows message to be
generated for the purpose of causing the system to enter a "sleep"
mode.
[0045] Button 156 is a pushbutton that causes a web browser
executing on the tablet computer system 102 to go to the user's
designated home page. In an exemplary embodiment of the present
invention, depressing button 156 generates an interrupt that is
received by a microprocessor within table computer system 102. The
interrupt is processed by an interrupt handling circuit or program,
which causes an message to be issued to cause the web browser to
return to a predetermined home page.
[0046] Display unit 118 is viewable through a see-through portion
covering greater than or equal to 50% of front panel 124.
Furthermore, display unit 118 is large enough to support an
onscreen keyboard operated by a user's fingers or other apparatus
capable of pressing points on display unit 118. A touch screen
(positioned adjacent to display unit 118) senses the duration and
location of such touches and communicates touch events to an
onscreen keyboard or other input application executing on tablet
computer system 102.
[0047] Base unit 104 has keyboard receptacle 134 to store keyboard
106. Guide grooves, 136a and 136b, are formed in lower shelf 138 of
receptacle 134 to guide keyboard 106 smoothly into receptacle 134.
Complementary knobs (not shown) extend from the bottom of keyboard
106 to fit into guide grooves 136a and 136b. Top shelf 140 of base
unit 104 extends over the keys (not shown) of keyboard 106, thereby
protecting keyboard 106 from inadvertent key presses, household
spills, and other interference. Base unit 104 also has support
interface 1 10 to receive tablet computer system 102 and hold it
steady in an upright position, as shown.
[0048] FIG. 2 depicts a rear view of an embodiment in accordance
with the present invention. The case has grips 204a and 204b
extending substantially parallel to the tablet sides 130 and 132.
In this illustration, the grips comprise curved recesses or grooves
in the back panel 200 of tablet computer system 102. In combination
with other structures of tablet computer system 102, each grip
forms a handle at one side of tablet computer system 102.
Specifically, a user grasps a side of tablet computer system 102
with the palm of the user's hand contacting the side surface (e.g.,
132) of the tablet computer system 102, a thumb or palm portion of
the user's hand contacting the front surface (e.g., 116 of FIG. 1)
of the front panel of tablet computer system 102, and one or more
fingers contacting the grip (e.g., 204b). In this manner, a user
can support the tablet computer system 102 by one hand with front
panel 124 facing upward, while the user's second hand provides
input to the computer system, such as by pressing keys on a display
screen keyboard (not shown).
[0049] While FIG. 2 depicts a specific handle configuration in
tablet computer system 102, other handle configurations are
contemplated in accordance with the present invention, including a
handle on one side, handles on two sides, and a handle or handles
positioned at the top and/or bottom sides. Moreover, a handle may
comprise a grip that is completely recessed through the case so as
to create a handle bar for the user to grip, wherein at least one
finger of the hand engages the grip to allow the user's hand to
wrap around the bar. Likewise, in an alternate embodiment, the grip
may protrude from, rather than recess into, the back panel. Such a
protruding grip may comprise a structure integrally formed in the
back panel, adhered to the back panel, or other wise affixed to the
back panel.
[0050] Infrared port 112, positioned at the top side of tablet
computer system 102, is oriented to communicate with a nearby
printer or other peripheral device. Port 220 is capable of
receiving a connector to a wired keyboard. Power switch 222 is a
two-position rocker switch that toggles the power to tablet
computer system 102.
[0051] Base unit 104 has curved top surface 206 positioned behind
support interface 110. The curved shape enhances support to the
horizontal center of tablet computer system 102 when tablet
computer system 102 is resting in the cradle or slot of support
interface 110. Back panel 208 of base unit 104 has an on/off switch
210 protruding therefrom. Jacks 212 and 214, preferably RJ-11 or
RJ-45 jacks, are accessible from back panel 208. Jack 212 receives
a service line connector (typically from a telephone outlet) to
provide wired communications service from a communications service
provider. Jack 214 receives a connection from a telephone to
provide a wired connection between the telephone (not shown) and a
communications service provider, through base unit 208. Power cable
216 connects to AC adapter port 218 to provide electrical power to
base unit 208.
[0052] The base unit 208 is sealed to prevent or to minimize the
amount of material entering the base unit 208. Base unit 208 is
formed by two plastic halves that form a labyrinth seal when
attached together to form the complete base unit case. Furthermore,
switch 210, and ports 218, 212, and 208 include gaskets to resist
the penetration of foreign material.
[0053] FIG. 3 depicts a block diagram of a tablet computer system
in accordance with the present invention. In an exemplary
embodiment, a computer system 300 executes an operating system,
such as Microsoft Windows 98 or Microsoft Windows CE, to support
one or more software applications. Computer system 300 can operate
as a stand-alone computer system possessing necessary input/output
interfaces and internal system components to implement a wide
variety of computer applications. In addition, computer system 300
can communicate with a base unit (as shown in FIG. 4) to access a
communications network, such as a LAN, WAN, an Internet, an
Intranet, or an Extranet. In this manner, computer system 300 can
access other computer systems and peripherals.
[0054] Motherboard 302 supports a wide variety of the system
components, many of which are (mechanically or chemically, for
example) attached to motherboard 302. Preferably, many system
components are soldered to motherboard 302 (such as with surface
mount components). Other system components are operably attached to
the tablet computer case, such as batteries 364. Microprocessor 304
is operably attached to motherboard 302. Companion chip 308 or an
appropriate chipset is coupled to microprocessor 304 by data bus
306 and address bus 310. Companion chip 308 provides functionality
for a FIR (Fast InfraRed) interface. In an exemplary embodiment,
the FIR interface is coupled to IrDA printer interface 312 and an
IrDA keyboard interface to provide wireless communications to a
remote printer, a remote keyboard, or other peripherals. Companion
chip 308 also provides functionality for a PCMCIA Card Interface
supporting a PCMCIA slot. Alternately, companion chip 308 may also
support an ISA interface for a IOMEGA's Clik storage medium and
other removable storage media. A PCMCIA card interface in companion
ship 308 is coupled to PCMCIA slot 314, which in a preferred
embodiment receives a 2.4 Ghz frequency hopping spread spectrum
radio frequency network adapter in Type II PCMCIA format.
[0055] Companion chip 308 also provides a two channel UART
(Universal Asynchronous Receiver/Transmitter), and an audio codec
(encoder/decoder) for supporting speakers 318a and 318b and
microphone 320. Audio codec 328 is also coupled to companion chip
308 and encodes/decodes signals to stereo speakers 318a and 318b
and headphone jack 322 and from microphone 320. Audio codec 328 is
used to process a stereo signal for stereo speakers 318a and 318b.
Audio output can also be routed to headphone jack 322.
[0056] Companion chip 308 also supports an analog front end
interface and a Universal Serial Bus (USB) interface. IrDA keyboard
controller 324 is coupled to the 8-bit keyboard interface in
companion chip 308. IrDA keyboard interface 326 is coupled to IrDA
keyboard controller 324 and is oriented to communicate in a
direction generally axial to motherboard 302, directed outward from
the front panel (124 in FIG. 1). Furthermore, IrDA keyboard
interface 326 is positioned in the lower quadrant of motherboard
302 to optimize communications between a wireless keyboard (not
shown) positioned to face the front panel of tablet computer 300.
Typically, such keyboard is used when tablet computer 300 is
positioned upright in a support interface of a base unit, such as
shown in FIG. 5. Therefore, by positioning IrDA keyboard interface
326 in the lower quadrant of the front panel of tablet computer
300, communications with the wireless keyboard sitting below the
display unit are optimized.
[0057] In contrast, IrDA printer interface 312 is positioned near
the top of tablet computer 300 and directed to communicate out the
top side of tablet computer 300. The orientation of IrDA printer
interface 312 is set to optimize wireless communications with an
IrDA printer or other IrDA peripheral positioned in the general
vicinity of tablet computer 300, but having a line of sight
obscured from the front panel of the tablet computer. Memory 334 is
coupled to microprocessor 304 and is capable of supporting system
memory, cache memory, and Read-Only Memory (ROM) for storing
configuration and BIOS information.
[0058] In an embodiment of the present invention, display 336 is a
12.1 inch SuperVGA LCD display supporting 800.times.600 resolution.
Display 336 is coupled to video controller 340, such as a
SMOSS/Epson 1355 or a Chips & Technologies 65555, which drives
the video displayed by display 336. Display backlight inverter 352
provides backlighting for the LCD display. Touch screen 338
receives input from a user by pressure applied to the screen. With
the addition of an appropriate software application, other input
means are possible including voice recognition and handwriting
recognition. In an embodiment, touch screen 338 is a Microtouch
5-wire Resistive Touch Screen. Touch screen controller 342 is a
serial interface controlling touch screen 338, and in an
embodiment, is a Tritech touch screen controller TR88L805 serial
interface. Touch screen 338 is coupled to touch screen controller
342 via cable 344.
[0059] Object stores 346, 348, and 350 are removably attached to
slots 370, 372, and 374. Each are capable of storing operating
system code, application code, personality data on the user, and
other data usable by the tablet computer system.
[0060] Antenna 354 is coupled to a wireless communication device,
such as radio frequency adapter 316, for communication with a
corresponding wireless communication adapter in a base unit (not
shown). Contrast buttons, shown generally at 356, are coupled to
the display 336 and video controller 340 to control the contrast of
the screen. Likewise, volume buttons shown generally at 358, are
coupled to audio codec 328 and the audio codec in companion chip
308, to control the volume of the speakers. Sleep button 360 is
coupled to microprocessor 304 and initiates a sleep mode to
minimize the power use of the tablet when the tablet computer is
not in use.
[0061] AC adapter connector 362 is capable of receiving a connector
from an AC adapter to receive auxiliary power for running tablet
computer 300 or for charging batteries 364. Batteries 364, disposed
in a detachable power module, are coupled to battery charger 366
and provide mobile power to tablet computer system 300. In an
embodiment of the present invention, tablet computer system 300
requires lithium ion batteries. In an alternate embodiment, four
Nickel Metal Hydride batteries (AAA cells) may be used. The
characteristics of the battery charger 366 must correspond to the
type of battery used. Also coupled to battery charger 366 is a
two-pin power lead that protrudes through a port in the case (not
shown) of tablet computer system 300. In an alternate embodiment, a
detachable power adapter module may contain a power coupling from
an external power source, one or more storage devices, and various
external interfaces, including additional adapter slots (such as
PCI or PCMCIA slots), a USB interface, serial and parallel
interfaces, SCSI interfaces, and mouse and keyboard ports.
[0062] The system components of tablet computer system 102,
including the case, are configured to optimize the weight
distribution of the tablet computer system 102. Accordingly, in an
embodiment of the present invention, a majority (50% or greater) of
the weight of tablet computer 102 is distributed in the lower half
of the tablet computer 102, and preferably distributed in the lower
one-third of the computer tablet 102. Specifically, the placement
of batteries 364 result in the majority of the weight of tablet
computer system 102 being positioned in the lower half of the
tablet. Likewise, the system components are positioned to
distribute the weight of the tablet computer system substantially
symmetrically about the central vertical axis of the tablet
computer. Such symmetry is achieved within the necessary tolerances
such that the tablet computer can easily balance on a user's leg,
forearm, or other support service positioned about the vertical
axis of tablet computer 102. Moreover, the majority of the tablet
computer's weight is preferably distributed horizontally in the
center four-fifths of the tablet computer about the vertical axis,
and preferably in the center two-thirds.
[0063] FIG. 4 depicts a block diagram of a base unit in accordance
with the present invention. Printed circuit board 402 supports
system components to perform wireless communications with a tablet
computer (see, for example, tablet computer 300 in FIG. 3) and to
perform communications with a communications network. PCMCIA slot
404 receives a standard Type II PCMCIA card capable of performing
wireless communication with a tablet computer. In both the tablet
computer and the base unit 400, the corresponding communication
devices may be removed and replaced with newer technology, although
to provide communications between the base unit and the tablet
computer, the PCMCIA wireless device 406 must provide a compatible
communication technology to that of the tablet computer. For
example, in an embodiment illustrated in FIG. 4, base unit 400
supports, in PCMCIA slot 404 a 2.4 GHz frequency hopping spread
spectrum radio frequency adapter card 406 for wireless
communication to the tablet computer. Correspondingly, a compatible
2.4 GHz frequency hopping spread spectrum radio frequency adapter
card (not shown) is required in the tablet computer to establish
the wireless communication link there between.
[0064] The relative bandwidths of the wireless communications link
between the tablet computer and the base unit and the wired
communications link between the base unit and the service provider
are balanced to reduce a data bottleneck in the system. For
example, if the wired connection is embodied by a typical 56 Kbps
modem, then the 2.4 GHz frequency hopping spread spectrum radio
frequency link (having a maximum bandwidth of approximately 2 Mbps)
is adequate. Alternately, if the wired connection is a DSL link
(having a maximum bandwidth of approximately 1.5 Mbps), the
wireless link can be upgraded to make maximum utilization of the
wired connections bandwidth. For example, a DSL connection to a
service provided could be balanced with a higher bandwidth wireless
connection between the tablet computer and the base unit, thereby
preventing a bottleneck in the wireless communication portion of
the link to the communications service provider.
[0065] Antenna 408 is coupled to adapter card 406 and is disposed
within the case (not shown) of base unit 400. Mechanism 410, when
pushed, can cause an inserted PCMCIA card 406 to be ejected,
although this mechanism is disabled in an embodiment of the present
invention because the slot is fully enclosed in the tablet
case.
[0066] Digital signal processing (DSP) chip 412 and microprocessor
414 are coupled to PCMCIA slots 404 and 416 via a bus interface,
such as a PCI, ISA, or PCMCIA interface. EEPROM 432 contains driver
code and data required to initialize and operate the modem card 420
and network card 406. In an alternate embodiment, a DSP chip
performs all control of the base unit, and the microprocessor is
not needed.
[0067] Jack 418 is coupled to PCMCIA adapter 420 to receive a
communications service line (not shown) from a communication
service provider. In an embodiment, jack 418 is an R-11 jack
coupled to an external communications interface, such as a PCMCIA
modem adapter card 420. The external communications interface is
disposed within the base unit and provides communication with an
external network. In an alternate embodiment, PCMCIA adapter card
420 may support Digital Subscriber Line (DSL) technology,
Integrated Digital Services Network (ISDN) technology, or other
wired communications technology. Alternately, PCMCIA card 420 may
be a PCMCIA network adapter card, such as a 100 MBit Ethernet
adapter for connecting to a LAN, or an additional wireless
communication interface. Accordingly, jack 418 could be an RJ-45
jack, a coaxial cable connector, or other network cable connector.
Jack 422, in an embodiment, is an RJ-11 jack for connecting the
base unit 400 to a telephone. This interface allows a parallel
connection between the telephone base unit and telephone jack to a
service provider.
[0068] AC adapter 426 is a power supply unit providing power to the
base unit 400. Furthermore, AC adapter 426 is coupled to a two-pin
power lead 428 that protrudes from a power supply port in the base
unit to allow contact with a corresponding power supply lead in a
tablet computer system. Assuming the base unit is powered by an
external power source, if the two pin power lead of the base unit
contacts the two pin power lead in a tablet computer, AC adapter
426 provides power to tablet power supply unit 366 (in FIG. 3). AC
adapter 426 is also coupled to AC adapter interface 424, which
receives a connector from an external AC source (not shown).
Mechanism 430, when pushed, causes an inserted PCMCIA card 420 to
be ejected.
[0069] FIG. 5 depicts a base unit 104 with removed keyboard 106.
Top shelf portion 140 forms the top portion of keyboard receptacle
134, which is configured to receive and align keyboard 106 into the
receptacle. Alignment is achieved, in part, by bulges, not shown,
located at the bottom of keyboard 106 to slide into guide grooves
136a and 136b.
[0070] In an embodiment of the present invention, there is no wired
data connection between keyboard 106 and base unit 102, or between
keyboard 106 and tablet computer system 102. A wireless data
connection is established between keyboard 106 and the tablet
computer system 102 using an IrDA interface, although other
wireless interfaces, including a radio frequency interface, are in
accordance with the present invention. Other embodiments, however,
may provide an alternate wired data connection among these
components, such as a power/data wire connecting the keyboard 106
to base unit 102. Likewise, a wireless data connection is
established between base unit 104 and the tablet computer system
102 using a radio frequency interface, although other wireless
interfaces, including an IrDA interface, are in accordance with the
present invention. The radio frequency interface is preferable due
to the bandwidth balancing required to avoid a bottleneck when the
wired connection to the service provider is a high-speed modem.
[0071] FIG. 6 shows tablet computer system 102. Recessed guide 600
is formed in front panel 124 of tablet computer system 102 and
assists in aligning case power supply port 602 in contact with a
corresponding base unit power supply port (700 in FIG. 7). As
recessed guide 600 descends into the base portion of support
interface 110, the front tab 142 of the base unit's support
interface matches into recessed guide 600 and slides to align
tablet computer system 102 into a repeatable position in the base
unit's support interface slot. Likewise, the grooves of grips 204a
and 204b formed in back panel 200 of tablet computer system 102
also slide to mate with complementary guides (702a and 702b in FIG.
7) in the back wall of the base unit's support interface.
[0072] FIG. 7 depicts a view of base unit 104 having a curved top
surface 206, a keyboard receptacle 134, and Support interface 110
generally comprises three surfaces, those being front tab 142,
support surface 704, and back wall 706. Front tab 142 extends
upward from base unit 104 to mate with the recessed guide in the
front panel of the tablet computer. The perimeter of front tab 142
is configured with sloping sides 708a and 708b to assist in the
horizontal alignment of the power supply contacts of both the
tablet computer system and base unit 104. Support surface 704
receives the bottom side of tablet computer system 102, supporting
the weight thereof. The length of support surface 704 extends
horizontally to substantially meet with the horizontal length of
the bottom side of tablet computer system. Back wall 706 extends
upward from support surface 704 to the edge 710 of curved top
surface 206 and tilts slightly toward the back panel of base unit
104 to provide a slight upward tilt of the display unit to
facilitate viewing by a user. Guides 702a and 702b are positioned
at each side of back wall 706 to mate with the grip grooves of the
tablet computer system. As such, the structure of the support
interface 110 allows the tablet computer to be placed therein in a
manner similar to a telephone handset being placed in a telephone
cradle while providing a weight supporting surface, horizontal
alignment, and front and back support to hold the tablet computer
steady in an upright position.
[0073] FIG. 8 illustrates a front view of an alternate embodiment
of the tablet computer system. Tablet computer 800 is generally
rectangular, having left side 802 and right side 804 that slope
slightly toward the horizontal center of tablet computer 800, such
that bottom side 806 is longer than top side 808. Display screen
810 is substantially centered horizontally in the front panel of
tablet computer 800.
[0074] A support interface is located along the bottom side of
computer table 800 and includes recessed area 812 surrounded by an
interface lip having sloping lip portions 814a and 814b, and
horizontal lip portion 816. These interface lips, particularly the
sloping lip portions 814a and 814b, comprise a case guide to mate
against a base unit guide for providing horizontal alignment as
tablet computer 800 is inserted into a base unit (see FIG. 1). The
support interface forms a tab that fits into a complementary,
slot-like support interface in the base unit. In the illustrated
embodiment, there is no data communication connection because the
support interface is substantially comprised of a non-conducting
material.
[0075] Furthermore, an electrical connection is provided between a
computer power lead and a base unit power lead, but no data
communication between the tablet computer and the base unit is
provided by this interface. Instead, all data communications is
accomplished by wireless means in the illustrated embodiment. Other
complementary support interface configurations are also
contemplated by the present invention, including a non-conducting
tab-like structure in a base unit that inserts into a slot-like
structure in the tablet computer case.
[0076] Tablet computer 800 also includes IrDA port 818 positioned
in the lower right portion of tablet computer 800 for communication
with an IrDA input device, such as a keyboard or a mouse, located
in front of and facing display unit 810. IrDA port 820 is
positioned on the top side of tablet computer 800 for communication
with a peripheral device, such as a printer, having a
light-of-sight obscured from the front panel and IrDA port 818. In
this configuration, IrDA port 820 can, for example, communicate
with an IrDA peripheral device located behind (obscured from the
IrDA port 818) or in front of tablet computer 800. An IrDA
interface device (see the block diagrams of the tablet computer
system in FIGS. 3 and 17) is operably attached to each IrDA port to
perform the wireless communication through each port. Microphone
822 is positioned near the top of tablet computer 800. Speakers
824a and 824b are positioned preferably on the bottom left and
right corners of the front panel of tablet computer 800.
[0077] FIG. 9 depicts a rear view of the alternate embodiment of
FIG. 8. Stand 900 is positioned in stand recess (at 902a and 902b)
formed into the back panel of tablet computer 800 and is operably
attached to tablet computer 800 by hinges 909a and 908b. When
tablet computer 800 is being held by a user, stand 900 can be held
into stand recess 902 such that stand 900 substantially become part
of the back panel. In this configuration, stand 900 includes stand
legs 904a and 904b and transverse support 906. Stand legs 904a and
904b each have a concavity extending substantially along the length
of each leg. The concavity forms a portion of the grip of a handle
along each side of tablet computer 800. In an alternate embodiment,
stand 900 can be convex or provide some other protruding surface or
feature to form a portion of each grip. In yet another alternate
embodiment, stand 900 may not contribute to any portion of each
grip. Hinges 908a and 908b allow stand 900 to fold out from the
back panel of tablet computer 800 to provide an upright support
against a support surface (see FIG. 12). Mini-stands 920a and 920b
can also fold out to support tablet computer 800 (see FIG. 17).
Both stand 900 and mini-stands 920a and 920b can be folded back
against the back panel of tablet computer 800, and will remain
approximately flush with the back panel until re-extended by the
user.
[0078] The lower portions of the stand recess, shown at 902a and
902b, also provide a case guide to detachably engage a
complementary base unit guide from a base unit (see FIG. 1). The
lower portions of the stand recess also comprise the lower portions
of the recessed grip in the illustrated embodiment. Accordingly, in
an embodiment without a stand recess, the grip itself or any other
case guide structure may engage a corresponding guide in a base
unit to facilitate horizontal alignment of the tablet computer and
base unit. As shown, the case guides at 902a and 902b are curved to
provide horizontal alignment of tablet computer 800 as it slides
onto the base unit.
[0079] IrDA port 820 is located in the top side of tablet computer
800 in FIG. 9. Scroll wheel 910 protrudes from right side 804 (from
the front perspective) to allow a computer to operate scrolling
capabilities of software executing on tablet computer 800. By
rolling wheel 910 clockwise, tablet computer 800 receives input
signals causing a scrollable view to scroll down. Likewise, by
rolling wheel 910 counterclockwise, tablet computer 800 receives
input signals causing a scrollable view to scroll up.
[0080] FIG. 10 depicts a top view of tablet computer 800. Two pin
power lead 1000 is positioned on the bottom side of tablet computer
800 in the bottom side of adapter module 1002. Power lead 1000 is
positioned to contact a two pin power lead, preferably having two
"pogo-pin" contacts protruding from the base unit. Adapter module
1002 embodiments may include a battery pack or a interface module
capable of containing elements such as an alternate power
connection, a storage medium, and a variety of data connections,
such as a high-speed network connection, a serial port, and a
parallel port. In alternate embodiment, a third pin may be included
in the power leads to provide proper grounding.
[0081] FIG. 11 depicts a bottom view of tablet computer 800 with
the adapter module removed. The concavities in the stand legs 904a
and 904b are shown generally at 1100a and 1100b, respectively.
These concavities extend along the length of each leg to form a
portion of a grip along each side of tablet computer 800.
Connection 1102 receives a complementary connection from the
removed adapter module to provide power to table computer 800.
Connection 1102 is internal coupled to an AC adapter/recharger
within tablet computer 800.
[0082] FIG. 12 depicts stand 900 unfolded to extend from the back
panel of tablet computer 800. Sliding supports 1200a and 1200b are
operably attached at one end to stand legs 904a and 904b. The other
end of each support is slidingly attached to a slot inside the
stand recess 1202 (also shown in FIG. 9 at 902a and 902b).
[0083] FIG. 13 depicts an alternate embodiment of base unit 1300
with keyboard 1302 inserted within keyboard receptacle 1304. In the
illustrated embodiment, base unit guides 1306a, 1306b, 1308a, and
1308b are configured to mate against complementary guides in an
inserted tablet computer (see, for example, FIGS. 1 and 2).
Specifically, the guides at 1306a and 1306b mate against the lower
portions of the stand recess (shown in FIG. 9), the lower portion
of the grip (shown in FIG. 9), or some other case guide to assist
in aligning the table computer with base unit 1300. Particularly,
alignment of computer power supply port and base power supply port
requires horizontal alignment of the two units.
[0084] To provide additional sturdiness and weight support, base
unit 1300 also includes back wall 1310 and edge 1312 to engage the
lower portion of the back panel of a tablet computer. Furthermore,
the bottom side of a computer table rests upon support surface 13
16, and the lower portion of the front panel of a tablet computer
rests against the inside wall of tab 1314 (i.e., the wall that
faces back wall 1310) to stabilize or steady the tablet computer in
an upright position.
[0085] FIG. 14 depicts an embodiment of the base unit in accordance
with the present invention. In contrast to the base unit
illustrated in FIG. 5, this embodiment lacks a lower shelf (see
lower shelf 138 in FIG. 1 and FIG. 5). Instead, the base unit
comprises a top shelf 1400, a left side portion 1402, a right side
portion 1404, and a back portion 1406. The side portions include
keyboard guides 1408a and 1408b having beveled ends 141 Oa and 141
Ob, slide portions 1412a and 1412b, and nipples 1414a and 1414b. A
keyboard (not shown) may be inserted under top shelf 1400 by
sliding the keyboard along support surface 1418 until the side
rails of the keyboard (see 1502 in FIG. 15A) contact beveled ends
1410a and 1410b, at which point the keyboard raises above the
support surface and onto slide portions 1412a and 1412b. This
action occurs at both side portions 1412a and 1412b of the base
unit and both side rails of the keyboard.
[0086] In an exemplary embodiment of the present invention, the
keyboard side rails have a bevel to assist in engaging the bevel in
the keyboard guides of the base unit. As the keyboard continues
into keyboard receptacle 1416 along slide portions 1412a and 1412b,
it eventually rides up over nipples 1414a and 1414b, respectively.
When the keyboard is completely inserted into keyboard receptacle
1416, a detent in each keyboard side rail (see, for example, detent
1510a in side rail 1502a in FIG. 15B) slips over each of nipples
1414a and 1414b to detachably retain the keyboard within keyboard
receptacle 1416. To remove the keyboard from keyboard receptacle
1416, a user can press on the two sides of the front of the
keyboard to lift (or tilt) the detents from nipples 1414a and 1414b
and pull the keyboard out along keyboard guides 1408a and 1408b. In
an exemplary embodiment, keyboard receptacle also includes a
receptacle power lead 1420 to contact corresponding keyboard power
leads (see leads 1500 in FIG. 15A).
[0087] FIG. 15A depicts a front view of a keyboard embodiment in
accordance with the present invention. Keyboard power leads 1500
are positioned to contact receptacle power leads (leads 1420 in
FIG. 14) when the keyboard 1504 is fully inserted into the keyboard
receptacle. Infrared communications port 1506 are positioned on the
front side of keyboard 1504 to communicate with a corresponding
infrared communications port on the front panel of a tablet
computer. FIG. 15B depicts a bottom view of a keyboard embodiment
in accordance with the present invention. Detents 1510a and 1510b
are located on side rails 1502a and 1502b. Battery receptacle 1508
holds batteries that provide power to keyboard 1504 and to the
internal infrared communications device operably attached to
infrared communications port 1506 (in FIG. 15A).
[0088] FIG. 16 depicts tablet computer system 800 supported on
support surface 1602 by the two mini-stands depicted in FIG. 9.
Right mini-stand 1600 and left mini-stand (not shown) extend out
from tablet computer system 800 to prop the display panel 810
toward a user. The mini-stands support the weight of tablet
computer system 800 as well as additional force applied by a user
when, for example, depressing buttons, shown generally at 1604, or
touching the touch screen in display panel 810.
[0089] FIG. 17 depicts an alternate system embodiment of the table
computer system in accordance with present invention. Batteries
1700 may provide power via two-prong power contact 1702 to battery
charger 1704. Alternately, power can be provided externally via AC
adapter connector 1706. Super VGA display screen 1710 is preferably
a 12.1" TFT or STN LCD display screen supporting 800.times.600
resolution. Display screen 1710 is preferably controlled by Color
LCD Controller Chips & Technology 69000. Touchscreen 1708 is
preferably a Microtouch 5 Wire Resistive Touchscreen. Touchscreen
1708 is preferably controlled by Tritech Touch Screen Controller
TRSSLSOS. Alternate configurations of display screen and touch
screen are also contemplated within the scope of the present
invention.
[0090] The embodiment illustrated in FIG. 17 has Cyrix Media GXm
microprocessor 1712 preferably coupled to PC1 bus 1714, Cyrix 5530
companion chip 1716, and 9 mm.times.2.5 Hard Disk Drive 1718.
Alternately, an ISA bus is supported to connect to PCMCIA Interface
or ISA Interface to PCMCIA Type II socket 1722, which receives
radio frequency network adapter 1724. SDRAM modules 1726 are
coupled to microprocessor 1712 by a data bus and an address bus
(shown generally at 1728). Scroll wheel 1720 protrudes from the
tablet computer case to allow a user to move scrollable windows by
rotating scroll wheel 1720. Other illustrated components in FIG. 17
are similar to corresponding components in the embodiment depicted
in FIG. 3.
[0091] FIGS. 18A, 18B, and 18C depict an alternate embodiment of
the case and base unit in accordance with the present invention.
Base unit 1800 is suspended below a substantially horizontal
surface. Tablet computer system 1802 fits into a guide slot 1804 in
base unit 1802, supported by a guide drawer 1806. An interface
portion of guide drawer 1806 has interface lip 1808 that engages
with recessed area 1810 of tablet computer system 1802. Tablet
computer system 1802 can be pulled out of guide slot 1804 on guide
drawer 1806, which is connected to the sides of guide slot 1804 by
flange 1814, pin 1812, and a slide mechanism (not shown) operably
attached to the base unit. When extracted from guide slot 1804,
tablet computer system 1802 and guide drawer 1806 rotate down to
hold tablet computer system 1802 upright to be viewed by a user.
The angle of tablet computer system 1802, when extracted, may be
variable, controlled by a stop incorporated into the combination of
flange 1814, pin 1812, and a slide mechanism. Tablet computer 1802
may be removed from guide drawer 1806 for mobile use, and replaced
to the guide drawer 1806 for later storage. The drawer can be
reinserted into guide slot 1804, with or without tablet computer
system 1802. Guide drawer 1806 also provides power to tablet
computer system 1802 via power contacts (not shown) in the tablet
computer system 1802 and the interior of the interface portion of
the guide drawer 1806. Keyboard 1816 may be stored in and removed
from keyboard slot 1818, in a manner similar to that described
regarding FIGS. 1 and 14. Other features of the illustrated
embodiment possess similar structure and functionality as
previously described embodiments, including structural interface
features, wireless communication characteristics and power
couplings.
[0092] FIG. 19 depicts an alternate embodiment in accordance with
the present invention. Tablet computer system 1900 sits in base
unit 1904, firmly engaged in an upright position by interface lip
1906 formed in the interface portion of base unit 1904. Base unit
1904 is attached to a substantially vertical surface 1908. Keyboard
1904 is inserted into a keyboard receptacle in base unit 1904.
Other features of the illustrated embodiment possess similar
structure and functionality as previously described embodiments,
including structural interface features, wireless communication
characteristics and power couplings.
[0093] Moreover, while there have been described herein the
principles of the present invention in conjunction with a specific
computer system implementation, it is to be clearly understood that
the foregoing description is made only by way of example and not as
a limitation to the scope of the invention. Particularly, it is
recognized that the teachings of the foregoing disclosure will
suggest other modifications to those persons skilled in the
relevant art. Such modifications may involve other features which
are already known per se and which may be used instead of or in
addition to features already described herein. Examples of related
modifications include a base unit hanging from beneath a horizontal
support surface (such as a hanging cabinet bottom) or from a
vertical support surface (such as a wall) from which a tablet
computer is secured via a hanging or folding cradle or base unit,
or an interlock or a grip disposed in a base unit. In addition, the
support interface of the tablet computer case may be positioned on
any or multiple sides of the tablet computer case. Furthermore, the
base unit may support a removable keyboard by holding the keyboard
below a support surface (such as a cabinet bottom) and above the
support surface (such as a shelf in the base unit or a
countertop).
[0094] Although claims have been formulated in this application to
particular combinations of features, it should be understood that
the scope of the disclosure herein also includes any novel feature
or any novel combination of features disclosed either explicitly or
implicitly for any generalization or modification thereof which
would be apparent to persons skilled in the relevant art, whether
or not such relates to the same invention as presently claimed in
any claim and whether or not it mitigates any or all of the same
technical problems as confronted by the present invention. The
applicants hereby reserve the right to formulate new claims to such
features and/or combinations of such features during the
prosecution of the present application or of any further
application derived thereof.
* * * * *