Human-machine interfaces are increasingly implemented with gesture based multi-touch technology. Multi-touch has become the norm in handheld devices but in large display sizes from 30 to 100 inches there hasn’t been an integrated and optimized solution available. Large size brings several challenges compared to handhelds and therefore their foil-based technology cannot be used. Large size also requires the capability to support multiple simultaneous users, so that effective collaborative applications can be developed. To address these needs, MultiTouch Ltd has developed MULTITACTION® technology platform for building large multi-user multi-touch LCD displays of any size.
MULTITACTION literally takes a new angle on multi-touch by working perpendicular to and through the LCD panel and screen surface. MultiTouch’s patented Computer Vision Through Screen (CVTS) optical imaging technology allows, not only the tracking of unlimited number of touch points, but also detecting whole hands as well as objects and markers placed on the screen for sophisticated augmented reality applications. MULTITACTION utilizes multiple infrared cameras placed behind the LCD screen, and with the new Matrix Tracking System (MTS) it increases the number of cameras to anywhere between 4 and 100. This allows the development of Integrated Backlight Emitter Camera (IBEC) modules which allow the same thin form factor for the display products by just increasing the amount of modules as the display size increases.
MULTITACTION incorporates several other innovations, including Extensible Hybrid Tracking Engine (EHTE) software which is embedded in the display. Hybrid Tracking aims to mitigate the biggest drawback of optical multi-touch technologies: their susceptibility to external light sources. By alternating very fast between tracking reflections and tracking shadows MULTITACTION can greatly expand the deployment possibilities for large multi-touch displays.In this White Paper the following MULTITACTION benefits are presented and explained:
MULTITACTION allows the development of any size multi-user multi-touch displays for professional, digital signage and consumer use. MULTITACTION is available for mass production now.
There are a number of multi-touch capable touch technologies in the market such as capacitive, resistive, infrared frames, surface acoustic wave and FTIR. GP Bullhound listed in their October 2010 report “The Era of Touch Interface is Upon Us” several key attributes for assessing different touch technologies. These include:
There has not been a technology available that would meet all these criteria. Especially in the large size LCD (or plasma) multi-touch display market only IR frame based technologies are widely available These solutions are suboptimal for multiuser multitouch capabilities, as defined by MULTITACTION.MultiTouch Ltd. has developed optical imaging based multi-touch technologies for many years and commercialized first LCD products already in 2008. So far MultiTouch Cells have been deployed in specialist applications in over 35 countries. These current products use single or dual camera setups and thus offer many of the same benefits to application developers. Their main drawback has been related to rather deep form factor which MULTITACTION is going to solve.