MOTO Development Group: Scalable Multitouch Prototype

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True Multitouch MOTO Development Group, based in San Francisco, has been working on its scalable multi-touch prototype display or Sensing Screen. The 19″ LCD monitor prototype uses a capacitive sensor to enable true multitouch–meaning more than two fingers.

Scalable MOTO Development Group’s multitouch technology can be scaled to 50″ and larger. This can be considered a breakthrough using capacitive touch technology to scale to display sizes bigger than 50″.

High Resolution The capacitive touch technology features very high resolution that can detect very small movements of the fingers. In the video below the Sensing Screen detects tiny pressure movements of the finger. Definitive position sensing is another aspect of the company’s multitouch technology that does not exhibit ghosting or aliasing when two fingers cross an asix.

Thin Because MOTO’s technology does not make use of cameras or projectors it can be applied on LCDs that can be used on tables, similar to how Microsoft’s Surface table is used but much thinner or on a wall or just like a monitor.

Microsoft’s Surface as well as Jeff Han‘s multitouch solutions require large housings for the camera and projection technology. Because of the projection technology being used the multitouch display is most effective when used in low-light environments.

Resistance Apple’s iPhone also makes use of capacitive touch technology. But it requires a grid of ITO (Indium Tin Oxide–a transparent material used to coat glass to add conductivity) traces to transmit and receive signals. An ITO-based capacitive touch screen is limited to about 8″ due to the high resistivity of the ITO layer.

Thin Wires MOTO’s capacitive multitouch sensor is very similar to the iPhone’s in that the presence of a finger interrupts a signal that can be used to indicate position. Instead of using an ITO layer, MOTO makes use of extremely thin wires to conduct the signals. Each row drives a signal that is received by all the columns at a rate of sixty times a second. The touch of a finger (or multiple fingers) reduces the signal strength reaching the columns and this signal reduction is interpreted as a touch. The thin wires in the video demonstration is made visible to prove this concept. In production screens much thinner gauge will make them barely visible.

If you would like to contact MOTO, you can do that by sending an email to collaborate@labs.moto.com.

Source: MOTO Development Group

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