Presentation showcasing how ShadowSense touch screens excel in performance, reliability, scalability and in its features. The technology is extremely easy to use, highly durable and can be run at low costs. Check out the advantages and the disadvantages of the ShadowSense displays and see whether they are appropriate for your application. To find out more please visit: http://crystal-display.com/products/shadowsense/

1. www.crystal-display.com
info@crystal-display.com
T: +441634 292025
Introduction and Overview
ShadowSense Touchscreen
Technology

2. Introducing Baanto™ ShadowSense™
•ShadowSense™ technology offers “
best in class” touch sensing solutions
 Performance
• Features
• Reliability
• Simplicity
• Scalability

3. ShadowSense™ Touch Solutions Features
• High Performance
• Exceptional Features
• Multi-touch
• Dynamic tracking
• Thickness resolution and reporting
• Configurable performance via Dashboard
• Stability
• No drift, mechanical alignment or temperature variation issues, best in class ambient
light rejection
• No calibration required, works with all major operating systems with no external
drivers
program (very user friendly)
• Fast response time independent of the number of touches
• All calculations carried out in the controller (not the PC as
with some other technologies)
• No user PC processor overhead
• 2 to 10 simultaneous touch points
• True ‘out of box’ operation

4. ShadowSense™ Touch Solutions Feature
• Durability
• Perimeter sensors decouple sensor performance, reliability, and optical
performance from the touch surface, no drift mechanisms
• Simplicity
• Interface to host PC is a USB HID protocol or seen as a touch mouse by Win XP™
OS – no external drivers, calibration or application software needed (Win XP™,
Win XPe™, Vista™, Win 7™, Win 8™, Linux™, Android™ and Mac™ OS) Scalability
• Displays from 8” to >265” (diagonal) can be supported
• Low Cost
• Baanto™ ShadowSense™ implementations are cost competitive with other
existing multi-touch solutions

5. ShadowSense™ Large Format Construction
• The ShadowSense™ touch frame are assembled simply like a
picture frame from 4 pieces. Current Generic Sizes Note these are
changing all the time, please contact your Baanto sales contact for up to date sizes.
• 32”
• 42”
• 46”
• 55”
• 65”
• 70”
• 80” The Baanto family of Large Format ShadowSense technologies
Note. These are ‘class’ sizes

6. ShadowSense™ Large Format Active Area
• Some of the large format products supplied by Baanto are slightly oversized
compared to the display’s active area. This allows for the use of the Windows
8 ‘charms’ feature
Windows 8™ edge Swipe gesture
brings up the Charms menu bar

7. Beam-Break: Problems with the competition
• Three characteristics of the PQ Labs topology
result in poor ambient light immunity
•Digital vs analog touch detection
• “No touch” is light level above threshold
• “Touch” is light level below threshold
• Requires binned LEDs which adds cost
• Touch detection is faulty whenever ambient
light noise is greater than “touch” threshold
•Side bar sensors
• Results in side bar sensors facing directly into
ambient light sources
•1 to 1 mapping of emitters to sensors
• Large number of sensors makes per sensor
filtering a costly proposition
PQ Labs / Zaagtech
Incident light
Ambient Light Immunity

8. Beam-Break: Problems with the competition
Touch Detection Processing
• PQ Labs and Zaagtech touch detection uses a simple beam break topology with
advanced touch algorithms
• Emitters are activated in a scanned methodology with “touch” / “no touch” detection
registered from a cluster of adjacent sensors
• Each scan results in a large data set that must be rigorously processed to determine
touch locations
• Complexity of algorithms requires they be run on a high performance CPU to result in
reasonable touch detection performance
• Anecdotal measurements of CPU requirements have shown the algorithms can
consume up to 40% of a quad-core desktop CPU resource
• CPU loading: High
• Driver and application integration effort: High
• ShadowSense™ performs all touch processing on a low cost microcontroller
• CPU loading: Zero
• Driver and application integration effort: Zero

9. Infrared (Beam-Break) – the good and the bad
Pros IR (Beam-Break) Cons IR (Beam-Break)
Clear glass (92% light through put) Lower resolution than other technologies
Touch operation Impervious to scratches Will be effected by Sunlight, bright lamps
Calibration setup never drifts after set up ‘Fly on screen’ false touches
Low touch force sensitivity (hover) Original patent expired allowing cheaper,
poorer quality product to come in from the
far east
Reasonably fast touch response
Works with almost any pointer if large
enough to block the light

10. IR (Beam-Break) Cons v ShadowSense™
ShadowSense™ has none of the Cons of IR (Beam-Break)
Cons IR (Beam-Break) ShadowSense™
Lower resolution than other technologies Resolution matches Resistive technology
Can be effected by Sunlight Only one side with sensors so affected less
than IR (Beam-Break) coupled with other
safeguards, works in bright sunlight
‘Fly on screen’ false touches Size of touching object can be ‘gated’ to
only allow touch of a certain size
Original patent expired allowing cheaper,
poorer quality product to come in from the
far east
Unique NEW technology with newly
granted patent protection
What's more, being a brand new design and not a revamp of existing technologies,
ShadowSense™ has several unique features built in that no other touch technology
has. Some of these will be described later in this presentation.

11. Touch – Optical
• Having said that the majority of large frames employ IR Beam-
Break technology, there is another family of touch products
which use optical camera technology to determine touch
positions
• They are based on 2 or 4 cameras placed in the corners of the
glass scanning the active area for ‘movement’

12. ShadowSense™ vs. Competing Perimeter Technologies
• Imaging sensors may have a lower acquisition cost, but the operational cost associated with
aligning the sensors is extremely high, the stability of the alignment is unreliable and the error
generated from misalignment is very high. On a 65” diagonal display, a mis-alignment of 1
degree could result in a vertical position error of 1.13 inches !
• ShadowSense™ architecture is deterministic and fixed by virtue of the printed circuit board
design. Component alignment is accomplish by design and well within the tolerances of pick
and place equipment at all EMS providers. This results in fixed alignments that are immune to
shock, vibration, and thermal effects.
BaantoNext Window / Lumio
Structural Advantages

13. Now speed this up many times and add a couple of more actors and this is an
approximation of what is happening in the multitouch capable ShadowSense™
frame with the leds being the footlights, the backdrop being the sensors and
the actors being the touching objects.
Three different coloured lights at different angles
highlighting the change in position of the cast
shadow
ShadowSense™ Architecture: An analogy of how it works
• Imaging standing still on a stage and
having the footlights turn on one at a
time from left to right around the 3
sides of the stage. You would notice the
position of the shadow your body casts
move along the back wall depending on
which footlight was lit.
Result= Accuracy and
Reliabilty!

14. ShadowSense™ - Frame Architecture
• Baanto™ sensors are unique optical sensors with an ultra-wide field of view which sense the total
amount of light falling on them: Note. This is not traditional beam break technology ‘on/off
switch’.
• Allows “mid-span” sensor placements that:
• Eliminate co-linearity and occlusion issues of camera based sensors only fitted in the
corners
• Reduces ghosting by increasing the visibility of each touch point

15. ShadowSense™ - Sensor Architecture
• The analog capability of ShadowSense™ sensors results in a precise determination of the
shadow cast by a touch object onto each sensor
• Based upon the location of each sensor – emitter combination and the ratio of illuminated
state to shadowed state, a vector to the object is calculated in the on board controller
• Note: this is not a traditional IR beam break technology grid layout, all light is targeted at the
sensor bar.

16. ShadowSense™ - Sensor Architecture
• The intersection of multiple vectors (leds) provides accurate position location for each touch
object. Note. The drawing is simplified for effect and in reality many leds are used to
determine the touch position with an accuracy as great as Resistive technologies
• Data from redundant vectors reduces ghosting and occlusions in multi-touch environments
and provides size information on the touching object

17. Sensor advantages: - key to system performance
• No lens
• Ultra-wide, 170° field of view (FOV)
design provide for mid-span sensor
locations
• Fast response time
• Sensors can be read up to 10,000 fps
provided fast response and accurate
position tracking
• Translates to system performance of 120
to 200 fps
• No exposure compensation (not cameras)
• Small size allows simple mechanical integration
• Position determination is over-determined,
eliminating occlusion, ghosting, and providing
touch object size data
• Variation in LED to LED brightness is irrelevant
• Each LED’s “full power” reading is
calibrated at manufacturing and
independent of other LED’s
• No binning required reducing BOM cost
• Changes in LED brightness are irrelevant to
position detection
• Detection is based on a ratio of LED light
readings , absolute readings are not used
• Changes in brightness can be detected
such that blockage or pending LED failure
can determined and reported
• “No Light” means detector and/or LED is
blocked
• Static object determination & rejection
implemented based upon duration of
blockage (chewing gum stuck to glass
scenario)

18. ShadowSense™ detection advantages
• Advanced ShadowSense Performance Features (SPF) including:
• SPF SnapCount™:
– Real time tracking of up to six touch points without slowing down the user
application (all processing done in on-board controller)
• SPF SizeAlert™:
– Real time touch point size calculation allows developers to create new and
innovative use models as well as implement palm and spurious touch rejection
• SPF RealTouch™:
– Responds to any IR touch object, eliminating the need for bare finger touching or
special styli or gloves
• SPF-10K™:
– Provides immunity to ambient light of up to 10,000 foot-candles, roughly equal to
being outdoors at noon on the equator.

19. ShadowSense™ detection advantages
• In addition to position, ShadowSense™
also determines the opacity of the touch
object
• The magnitude of the shadow can be used
to determine and control the hover
distance for solid objects
• Hover distance is the distance above the
protective glass at which a touch point is declared
valid
• Shadow density can be adjusted to ignore
translucent objects, specifically fluids
ranging from water / rain to spills such as
coffee or viscous fluids like oil
Sensor Light Source
Light Source
Light Source
Sensor
Sensor

20. ShadowSense™ detection advantages
• Object size determination can be used for
spurious touch and palm rejection
• The minimum and maximum touch sizes can
be adjusted to “gate” touch reporting to an
object of interest such as a finger
• Spurious touch points are ignored
• Large touch points such as palms are ignored
• The touch size can also be used to create a
pseudo-pressure model based upon the
change in touch area as a finger presses
harder on the touchscreen

21. ShadowSense™ set up program Dashboard
• The previous features are configurable along with many others
in our set up program called ‘Dashboard’. This application will be
covered in more detail in a separate presentation.
• The program contains diagnostic as well as configuration tools
along with the ability to update the firmware in the touch
frame. The program is not available from the Baanto web site
and it is left to the individual Integrator/Distributor to decide if
they want their end users to have access to this program or not.

22. ShadowSense™ – Summary
• The ShadowSense™ touch frame is a unique look at the
business of determining touch on screens from 15” to 265”.
• No other screen has the size range we do
• Baanto have been awarded its first patent (several other in the
pipe line) for this technology at a time when most others have
seen there patents expire (25 years old or more)
• With no external software drivers needed, it truly is ‘out of the
box’ and ‘future proof’
• For more information, datasheets and videos,
please visit: www.crystal-display.com
or email us at: info@crystal-display.com