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Projected capacitive touch (PCT; also PCAP) technology is a variant of capacitive touch technology but where sensitivity to touch, accuracy, resolution and speed of touch have been greatly improved by the use of a simple form of artificial intelligence.
Capacitive sensors are constructed from many different media, such as copper, indium tin oxide (ITO) and printed ink. Copper capacitive sensors can be implemented on standard FR4 PCBs as well as on flexible material. ITO allows the capacitive sensor to be up to 90% transparent (for one layer solutions, such as touch phone screens).
In 1976 a new x-y capacitive screen, based on the capacitance touch screens developed in 1972 by Danish electronics engineer Bent Stumpe, was developed at CERN. [ 1 ] [ 17 ] This technology, allowing an exact location of the different touch points, was used to develop a new type of human machine interface (HMI) for the control room of the Super ...
[7] [8] [2] [9] [10] In 1973 Beck and Stumpe published a CERN report, outlining the concept for a prototype touchscreen as well as a multi-function computer-configurable knob. [11] [12] On the left, x-y multi touch capacitance screen prototype developed at CERN in 1977; [13] [14] on the right, self capacitance screen developed at CERN in 1972. [15]
Cypress is the world leader in capacitive user interface solutions including CapSense touch sensing, TrueTouch touchscreens, and trackpad solutions for notebook PCs and peripherals.
1.2 Projected capacitive (PCAP) 1.3 Surface acoustic wave (SAW) 1.4 ... This is a list of notable companies that manufacture touch input devices or components. ...
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