The way we use computers today will soon change. The technology of the future will allow us to interact with the computer on a whole different level from what we are used to. The tools we use to communicate with the computer - such as the mouse and the keyboard, will slowly disappear and be replaced with tools more comfortable and more natural for the human being to use. That future is already here. The increase rate of how touch screen hardware and applications are used is growing rapidly and will break new grounds in years to come. This new technology requires new ways of detecting inputs from the user-inputs which will be made out of on-screen gestures rather than by the pressing of buttons or rolling mouse wheels. The name Surface comes from "surface computing”. Surface computing uses a blend of wireless protocols, special machine-readable tags and shape recognition to seamlessly merge the real and the virtual world. Multi-touch technology is an advanced human-computer interaction technique that recognizes multiple touch points and also includes the hardware devices that implement it. You can download this file from here https://adf.ly/Porg1

1. SURFACE COMPUTING
YOU ARE THE
CONTROLLER
MULTITOUCH TECHNOLOGY

2. –new way of working with computers that moves beyond
the traditional mouse-and-keyboard experience
NATURAL USER INTERFACE
INTERACTION WITH DIGITAL CONTENT IN A MORE HUMAN WAY
LEVERAGE OUR KNOWLEDGE ABOUT EVERYDAY OBJECT FOR
INTERACTION WITH DIGITAL WORLD
TOUCH AND GESTURES RATHER THAN PHYSICAL DEVICES LIKE
MOUSE AND KEYBOARD

3. Graphical
User Interface
Command line
1985
PC
1990
GUI
Multiple Windows
Menus
1995
Internet
Hyperlinks
Search Engines
2001 Digital Decade
SURFACE TABLE
.NET
Smart devices
Natural
User Interface
GESTURE COMMANDS
TOUCH CONTROL

4. 2001: Microsoft researchers “Steve Bathiche and
Andy Wilson” developed idea of interactive table
that could understand the manipulation of physical
pieces.
2003: 1st prototype model named T1 was born
2005 :Attention turned to its form factor-
Tub proto type was designed.
2007:Final structure finalized, interactive
tabletop device was built that seamlessly
brings both the physical and virtual worlds
into one.
T1 PROTOTYPE
TUB PROTOTYPE

5. Microsoft Surface is a surface computing platform that responds to
natural hand gestures and real world object
Direct Interaction
Multi-
Touch
Contact
Object
recognition
Multi-User
Experience
•FOUR MAJOR COMPONENTS

6. TOUCH SENSING
•RESISTIVE
•CAPACITIVE
•OPTICAL
MOTION SENSING
•OPTICAL SENSING
•RADIO SENSING
•THERMAL SENSING

7. Controller Decides Position of Touch
Same on Second screen for Y
Uniform Voltage on First Screen for X
Contact is Made
User Presses Down
Resistive Touchscreen

8. WORKING
One screen for X
Another screen for Y
Both screen electrodes acquire
a specific voltage value
Controller categorizes electrical
data
Software analyze data values
and decides touch position

9. Capacitive Touch Technology
BEFORE
TWO TYPES
1.SURFACE CAPACITIVE TOUCH
2.PROJECTED CAPACITIVE TOUCH

10. The controller precisely calculates the proportion of the current passed through
the four electrodes and figures out the X/Y coordinate of a touch point
Theoretically amount of current that drifts through the four electrodes should
be proportional to the distance from the touch point to the four corners
Finger touch draws a slight amount of current is drawn
A human body is an electric conductor
4 Electrodes are at 4 corners
1.Surface Capacitance

11.  Capacitor forms
 Current flows
 Controller Determines location
of touch by ratio of currents
 The XY coordinates are decided
ITO
Glass surface
Finger
i
i
v
A
R




1
i
BEFORE:
AFTER:

12. 2. Projected Capacitance
• Two parallel ITO layers
• Two sheets of glass
• E Field is projected through glass
• Finger couples with E field
• Capacitance changes
• Controller decides touch location
ITO
Air
ITO
ITO
Glass Surface
Finger
C1
Ct
Cnew=(C1*Ct) / (C1+Ct)

13. Separate touch pads
are arranged according
to A coordinate system.
Every point on the
grid generates its own
signal when touched
and relays that signal to
the controller.
This allows the
controller to determine
the location and
movement of
simultaneous touches in
multiple locations

15. A process by which light is
trapped within a medium and
can be interrupted by a third
medium of higher reflective
index to cause light to escape.
Frustrated Total Internal Reflection
An Example

16. IR LED
IRLED
ITM–GIDA RECEPTION
SELECT
CLASS
TO
LOCATE
A31 4th Floor
Room 405
Finger
touches this
point
Blobs
created
IR camera detects these blobs
Plexiglass
Student id

17. FUN & ATTRACTIVE
RIGHT SET OF FUNCTIONS
THAT FULFILL YOUR NEEDSEASY TO LEARN
&REMEMBER
HOW TO USE IT
SOFTWARE STILL EMERGING
TO COPE UP WITH HARDWARE
FAR DIFFERENT FROM
TRADITIONAL TECHNOLOGY

18. TOUCHING THE FUTURE SKY IS THE
LIMIT

19. WHAT SHOULD BE THE AIM OF SUCH TECHNOLOGICAL
DEVELOPMENT?

20. THANK YOU
FOR YOUR ATTENTION
ANY QUERRIES?
Work with machines in the human way