Rugged Multi-Touch PCTs Have Sunlight Readability

Densitron has introduced a series of Multi-Touch Projected Capacitive Touchscreens (PCTs) that require only the slightest touch (near 0g activation force) to function. The PCTs have the ability to detect multiple stimuli and up to 10 simultaneous touch inputs. They also enable gestures such as zooming in, zooming out and rotation. As they are made from an all-glass construction, they are less likely to suffer from the Newton-rings phenomenon.

The multi-touch sensors have an operating temperature range between -20C to +70C, and go perfectly with many of Densitron's TFT displays. Complete Display and Touch modules are produced using advanced and cost-effective Optical Bonding Technology. This affixes a touch sensor directly onto a flat-panel display, to eliminate the air gap in between and reduce reflectance to as low as 0.2 per cent. This increases contrast ratio, enabling sunlight readability without backlight modification. The optical bonding process also makes display modules more rugged, as it increases their ability to withstand higher-impact forces compared to bonding without optical adhesive.

To address potential electrical interference between a display bezel and the edge of a capacitive sensor, Densitron offers controllers that allow users to tune SW parameters to optimise sensor, controller and display combination. The controllers are capable of providing touch input data in I2C or USB format. Default parameters will be supplied for each sensor to get design engineers started and details of the data format can also be provided.

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