This document provides an overview of tablet PCs, including their history, hardware components like the electromagnetic digitizer and pen, and software features in Windows XP Tablet PC Edition like digital ink and the input panel. It discusses how tablet PCs function as both notebooks and PDAs, with designs as either slates or convertibles, and the key components and technologies that enable pen input and writing on the computer like the tablet sensor, pen coil, and digital ink data type.

1. Tablet PCTablet PC –– A mobileA mobile
““notebooknotebook””
Done by aayush kumarDone by aayush kumar

2. Coming up next…
• Introduction
• Hardware view
• Software view

4. “Tablet” stands for… ?

5. “Tablet” stands for…(con’t)
• A plate on which we can write.

6. The History of Tablet PCs
• Concepts of writing on computer is not new
–
1. Pen Windows OS from Microsoft (In the time of Windows
3.1)
2. Windows 95 Pen Edition
3. Newton Pen input device (from Apple Computer)
• But all failed…

7. The History of Tablet PCs
• Bert Keely – the dreamer of
Tablet PCs.
• First drawing the future of Tablet
in the SGI lab.
• In order to fulfill his dream, he met
the CEOs of Apple and Dell, but all
of them refused Keely.
• Finally, Bill Gates accepted his
suggestion, and soon decided to
develop an OS for his dream.
Microsoft software
architect Bert
Keely shows a
prototype of the
Tablet PC during
Bill Gates' keynote
at COMDEX/Fall
2000.

8. What we can expect for
Tablet PCs ?
• Function as a real “Notebook”

9. What we can expect for
Tablet PCs ?
• Can we expect more ? ….
• All functionality one computer could
has.

10. What is Tablet PCs ?
• It is a superset of –
(1) PDA
(2) Notebook
(3) Desktop

11. What is Tablet PCs ?
• Software view – Windows XP Tablet PC
Edition.
• Hardware view – the computers which
running the tablet OS.
1. “Slate” Tablet – has no keyboard or mouse but a
pen as input.
2. “Convertible” Tablet – like traditional notebook,
but has a rotatable screen.

12. Different Designs: Slates
And Convertibles

13. What feature should
Tablet PCs have ?
• An electromagnetic digitizer to
convert handwriting
• Rapid hot docking
• Fast standby resume

14. • Screen rotation
• Legacy-free – you should not expect any
serial/parallel ports or PS2 on a Tablet PC.
• Log-on and log-off at the click of a
button
(from Microsoft : Hardware Assumption for Tablet PCs)
What feature should
Tablet PCs have ?(con’t)

15. Coming up next…
• Introduction
• Hardware view
• Software view

17. Tablet PC Structure

18. Buttons
• Hard Buttons

19. Buttons (con’t)
• Soft Buttons

20. Writing On Computer ?
• In Addition to a screen and a pen, you should have
one ”sensing technique”.
• For PDA -> resistive-control panel.
• For Tablet PC -> Electromagnetic Digitizer.
3D-Control

21. The Tablet Pen

22. Electromagnetic Digitizer
• The sensor – which is embedded behind the
display.
• The pen – which contains only the LC-circuit
but no battery.

23. Getting the Position

24. Getting the Position (con’t)
• The coupled energy resonates with
the circuit.
• And reflects back towards the
sensor by forming a shaped h-domain
field at the tip of the pen.

25. The Coil Switch

26. The Coil Switch
• Power Consumption – Larger than
normal notebook LCD.
• Power management is a main concern
in the design of Tablet PC.

27. Additional feature
• Pressure
• Angle
• Eraser-like tip – to simulate the eraser.
• Additional button – to simulate the right
button of the mouse.

28. Comparison

29. Where does the data go ?

30. Where does the data go?
(continued)
• The raw data – gathered by the sensor, then
send to the tablet control chip (W8001).
• From analog to digital – which is done by
the W8001.
• Data Processing – the digital data is relay to
the MCU, and then be computed into (x, y, z),
pressure, tilt angle.
• To Client – sent by either an asychronous
serial interface (UART) or a synchronous one
(SSI, SPI, I2C)

31. Other Concerns
• Should perform error correction
calculation to counteract many
distortions. (inductive components
and metals)

32. Next Coming…
• Introduction
• The hardware view
• The software view

33. Ink
• Ink is what we write on paper.
• The “Digital Ink” technology has
been developed by Microsoft.

34. The concept of Ink
• A visualization of pen strokes.
• A data type supported by OS – you can
use ink on every application !!

35. Input Panel
• Write Anywhere
• Writing Pad
• Character Recognizer
• On-Screen Keyboard

36. What ink can do…
• Mouse
• Text editing
• Drawing
• Gesture

37. From Ink to Money
• “Digital Ink” technology – support the ink data
type from the os system.
• The prospect of ink –
1. Business signature security.
2. No need to teach people how to use computer.
3. Many chances waited to be discovered…

38. Gesture
• Software developer can design his own
gesture.
ex. 3D rotation, special move…
• Recognition issues
solution : ink-only mode,
Gesture-only mode,
or Mixed mode.

39. How to pen-enable your
computer
• Pen-enable – to use electromagnetic pen as
mouse.
• Need hardware support.
http://www.wacom.com/productinfo/index.cfm

40. How to ink-enable your
computer ?
• Ink-enable – to draw and edit ink on an ink-
enabled application.
• Download the Windows XP SP2 and
Experience Pack for Tablet PC, then
execute.
http://www.microsoft.com/windowsxp/tabletpc/default.mspx

41. How to develop ink-enable
applications ?
• Windows Tablet SDK v1.7 available.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dntablet/html/Ta
• Visual Basic .NET
• C#
• Managed C++

42. Four scenario of ink-
supported scheme

43. Ink to Text Conversion
• For an application itself does not accept
pen and ink input directly.
• It can still receive ink and handwriting
input through Tablet PC Input Panel.

44. Ink Controls
• You can position the controls on the user's
screen to a fixed region for pen and ink
input.

45. Surface Ink
• These application support features such as
selection and editing ink.
• Do not convert handwriting to text.
• Do not reflow ink.

46. Ink Manipulation
• Handle ink as a data type as surface ink.
• But support reflowing and overlay ink
object.

47. Speech Control
• The Tablet APIs also provide many
feature for speech-enable apps.
• User can do things in the same time –
Send control via speech input
Retrieving data from speech output
Do pen editing

48. Other Concerns for Tablet
Applications
• Rapid hot docking
• Fast standby resume
• Legacy-free Log-on and log-off at
the click of a button
• Power Issues.

49. Thank you for
watching