NEXT GENERATION PROJECTED CAPACITIVE TOUCH TECHNOLOGY NOW DEVELOPED
A D Metro’s research and development engineers
are pleased to present the newly developed Multiplexed Projected
(MPC). MPC technology streamlines the PCAP design, integration,
and maintenance allowing it to be as easy to integrate as standard
resistive technology. MPC does away with cumbersome matching
of controllers with specific size, ratio, and orientation of touch
The MPC intelligent controller is connected
to the sensor by 3 wires, works with any size sensor, with any
number of x and y channels,
and in any orientation. The new technology employs a common buss
wire that is connected to all channels. In between the buss wire
and each channel is a screen printed resonant filter circuit
that allows only a specific frequency to pass to each individual
Screen Printed Resonant Filter Circuits
The MPC intelligent controller, on initial setup,
sweeps through a radio band and identifies all the x and y channels.
sweep, each time a frequency that matches the resonant filter
of a channel is hit, a signal change allows the controller to know
there is a channel at that frequency. The channels then are programed
in a few seconds. To complete the controller setup, the user
prompted to touch the upper left-hand corner of the sensor to
identify the orientation of the sensor.
MPC technology has no downside over conventional Projected Capacitive
technology but there are numerous benefits:
• One controller is compatible with any sensor size.
• No more controller programming to handle specific sensor channels
• No more multi-trace large ribbon cable on the sensor – only
3 wires are required.
• No more short sensor cable to avoid cable cross-talk. Controller
and sensor can be as
far apart as required.
• MCP technology works with many frequencies making it Much more
tolerant to radio
• Cost and production method are identical to conventional PCAP.
As development continues, the controller will be able to automatically
set the best performing touch sensitivity during the auto setup
function and will provide water rejection by working in an automatic
mode that will allow it to sense what kind of water contamination
is on the sensor and adjusting signal processing automatically
to deal with it.
“Projected Capacitive technology commands the lion’s
share of the touch screen marketplace but it is public domain so
anyone can produce it. It is also not the easiest technology to
work with requiring many design considerations for successful integration.
developing our next generation Projected Capacitive technology,
called MPC, we have removed almost all the Projected Capacitive
design and integration difficulties and more importantly we will
secure the intellectual property rights to this new technology
that everyone should want immediately based on its significant
benefits and price comparability to conventional PCAP. We expect
MPC to be a game changer in the touch screen market. Whoever obtains
the MPC intellectual property rights will likely control the market.” – Albert
David / CTO A D Metro