White Papers

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Touch Detection Overview

Baanto ShadowSense™ touch technology is an innovative and patented optical position sensing technology. Unlike other optical technologies that utilize cameras or imaging arrays, ShadowSense designs use high performance sensors operating in the analog domain to provide unprecedented performance, stability, and accuracy. Featuring an efficient sensor architecture coupled with elegant position detection algorithms, ShadowSense designs overcome many of the challenges faced by traditional optical designs.

DownloadTouch Detection Overview

Baanto ShadowSense™

ShadowSense is an innovative and patented optical position sensing technology that uses high performance sensors operating in the analog domain to provide unprecedented performance, stability and accuracy.

DownloadBaanto ShadowSense™

Touch Pressure in an Optical Touch System

The selection of a touchscreen technology is often reduced to selecting the product that has the primary characteristic you need for your application and then working around the undesirable baggage that came along with your choice. Until the arrival of ShadowSense, if you needed pressure activation, then you had to deal with a fragile resistive screen that significantly reduced your display brightness and scratched within minutes of being used. If you wanted bare finger activation, then capacitive was your selection and you had to deal with the fallout from casual scratches and incidental EMI. If you didn’t want users to take off their gloves, then SAW might have been your choice, until a piece of gum or bird debris stuck to the screen and rendered the touchscreen useless. Optical systems feature “Any Object” and “Zero Force” touch detection, but hovering and incidental touches plagued your applications.

DownloadTouch Pressure in an Optical Touch System

Palm Detection & Rejection

The proliferation of multi-touch technologies has created a challenge for application developers that have been comfortable with traditional single touch user interfaces. Drags, pinches, and other dynamic touches now cause the traditional “single extended finger” to move and be oriented in unexpected ways as the entire hand moves across the screen. Depending on the touch technology, random touches may be recognized and reported to the host from sources as diverse as the side of the hand, the palm, jewelry, coat sleeves, and other random personal articles.

DownloadPalm Detection

Rain and Fluid Discrimination for Touchscreens

There are some weather conditions that your equipment just shouldn’t be subjected to … But that doesn’t mean your system can only work on clear sunny days either!

Rain and fluids on a touchscreen can wreak havoc with the performance of your system. While resistive touchscreens can operate with water or other fluids on the screen, the durability issues of the resistive membrane make them unsuited for outdoor operation where dust, dirt, and other abrasive materials can irreparably damage the touchscreen in a matter of days if not hours. Surface and Projective Capacitive touchscreens are more durable, but rain and other, nastier fluids also contain dissolved solids and gases that can make them conductive, resulting in random touches or a total lock up of the touchscreen. Optical systems can detect rain drops and drips on the touchscreen as a touch, making them sensitive to erroneous touch performance as well.

DownloadRain & Fluid Discrimination for Touchscreens

Fault Tolerance in Touchscreens

Touch screens are becoming prevalent in a wide range of industries such as retail, digital signage, business and collaboration spaces, and healthcare. With the use of interactive displays becoming more popular there is now a need more than ever for a well performing and reliable touch technology. Many operations cannot afford to have their touch screen become sluggish or unresponsive so it is very important that when choosing a technology to adopt that any potential pitfalls are carefully considered.

DownloadFault Tolerance in Touchscreens

 

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905-670-3317

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