Tablet PC Tablet PC –– A mobile A mobile ““notebooknotebook””

Tablet PC Tablet PC –– A mobile A mobile ““notebooknotebook””

Done by aayush kumarDone by aayush kumar

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

“Tablet” stands for… ?

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

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 Edition3. Newton Pen input device (from Apple Computer)

• But all failed…

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.

What we can expect for Tablet PCs ?

• Function as a real “Notebook”

What we can expect for Tablet PCs ?

• Can we expect more ? ….

• All functionality one computer could has.

What is Tablet PCs ?• It is a superset of –

(1) PDA(2) Notebook(3) Desktop

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.

Different Designs: Slates And

Convertibles

What feature should Tablet PCs have ?

• An electromagnetic digitizer to convert handwriting

• Rapid hot docking • Fast standby resume

• 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)

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

Tablet PC Structure

Buttons• Hard Buttons

Buttons (con’t)• Soft Buttons

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

The Tablet Pen

Electromagnetic Digitizer

• The sensor – which is embedded behind the display.

• The pen – which contains only the LC-circuit but no battery.

Getting the Position

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.

The Coil Switch

The Coil Switch• Power Consumption – Larger than

normal notebook LCD.• Power management is a main

concern in the design of Tablet PC.

Additional feature• Pressure• Angle• Eraser-like tip – to simulate the eraser.

• Additional button – to simulate the right button of the mouse.

Comparison

Where does the data go ?

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)

Other Concerns• Should perform error correction

calculation to counteract many distortions. (inductive components and metals)

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

Ink• Ink is what we write on paper.• The “Digital Ink” technology has

been developed by Microsoft.

The concept of Ink• A visualization of pen strokes.• A data type supported by OS – you

can use ink on every application !!

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

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

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…

Gesture• Software developer can design his own

gesture.ex. 3D rotation, special move…

• Recognition issuessolution : ink-only mode, Gesture-only mode,

or Mixed mode.

How to pen-enable your computer

• Pen-enable – to use electromagnetic pen as mouse.

• Need hardware support.http://www.wacom.com/productinfo/index.cfm

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

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/TabPC05RcPk.asp

• Visual Basic .NET• C#• Managed C++

Four scenario of ink-supported scheme

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.

Ink Controls• You can position the controls on the

user's screen to a fixed region for pen and ink input.

Surface Ink• These application support features such

as selection and editing ink.• Do not convert handwriting to text.

• Do not reflow ink.

Ink Manipulation• Handle ink as a data type as surface

ink.• But support reflowing and overlay ink

object.

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 outputDo pen editing

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.

Thank you for watching