4-wire resistive touch panel controllers add gesture detection

January 15, 2014 // By Graham Prophet
Rohm Semiconductor's BU210xx series of 4-wire resistive touch panel controller ICs come in a variety of package options and include a 8-bit or 32-bit CPU for 2-point gesture detection and a calibration function for enhanced flexibility and reliability. Automotive-grade types are available. Proprietary technology and compact design enable component reduction and easier, user-friendly operability such as gesture input when wearing gloves.

Although capacitive touch panels capable of multi-point detection are increasing in popularity, there is still much demand for lower cost resistive touch technology in digital cameras, car navigation systems, and other applications. The resistive touch method typically provides 1-point detection operation using a stylus/pen or for simple button selection. However, ROHM has developed and mass-produced 2-point detection controller ICs that are market-proven and have been widely adopted in automotive applications such as displays for audio and car navigation systems.

Features of BU210xx ICs include;

Compatible with 4-wire resistive touch panels

Integrated CPU, capable of 2-point gesture detection

No external parts are required

Calibration function absorbs characteristics changes due to temperature, ageing, and production variations

Operation possible while wearing gloves or with fingernails

ROHM Semiconductor; www.rohm.com/eu