Introducing Baanto™ ShadowSense™

• ShadowSense™ technology offers “

best in class” touch sensing solutions

Performance

• Features

• Reliability

• Simplicity

• Scalability

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

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

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 technologiesNote. These are ‘class’ sizes

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

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

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

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

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.

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’

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

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.

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

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.

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

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)

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.

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

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

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.

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