Touch-key functionality embedded into liquid crystal display glass introduced by andersDX

LONDON, 4 Aug. 2013.Display applications experts at andersDX in London are introducing In-Cell Touch technology custom liquid crystal display (LCD) installations in low- to high-volume consumer manufacturing.

Embedded into a segment display, it differentiates their product's user interface while adding technical and commercial benefits. Instead of a touch sensor bonded onto the LCD display, each In-Cell touch key is embedded directly into the LCD cell. The LCD ITO pattern is then designed to match individual touch key symbols.

An Atmel Q Touch sensor IC integrated into the display electronics controls as many as four touch keys per application. Key detection accuracy is maintained through self-calibration and auto drift compensation.

The simple self-capacitance sensor design can sense through glass as thick as millimeters or plastic as thick as 5 millimeters. It operates from 1.8 to 5.5 volts DC.

With no external touch sensor, optical transmissivity is preserved, while the display module is thinner, lighter and easier to integrate. Hardened glass ruggedizes the display, while touch buttons or keys activate with no pressure.

For more information contact andersDX online at www.andersdx.com.