In-Cell Touch-Process

LC-Displays with integrated interaction surface

The In-Cell Touch process links a Liquid Crystall Display with a capacitive touch to interact with each other. It opens new possibilities in provides new means of transferring data on LCDs directly and above all, without detours via buttons or other input options.

The connection and merging of the LCD and the touch controlling works via specially therefore developed driver ICs, which combine both functional parts on one die. According to the specification the driver IC can drive up to 4 x 40 segments, in addition capacitive touch surfaces can be evaluated on the display. This is sufficient for up to 20 7-segments, respectively up to 10 14- segments, or up to 160 symbols. It communicates with the micro processors via either a serial bi-directional I²C bus or via SPI interface, just to name a few factors.