Multi-touch, high-speed, high noise immunity, low-voltage resistive touchscreen controllers

Rohm Semiconductor new BU21023/BU21024 series of high-speed, high noise immunity, low-voltage resistive touchscreen controllers are the industry’s first to enable multi-touch (two-point) operation and intuitive gesture control, including pinching, spreading and rotating – previously possible only with more expensive capacitive touch systems, the company said. The design can save power, Rohm told Control Engineering.

06/08/2011


Rohm Semiconductor BU21023/BU21024 series of high-speed, high noise immunity, low-voltage resistive touchscreen controllersRohm Semiconductor BU21023 / BU21024 series of high-speed, high noise immunity, low-voltage resistive touchscreen controllers are now available. These new controllers are the industry’s first to enable multi-touch (two-point) operation and intuitive gesture control, including pinching, spreading and rotating – previously possible only with more expensive capacitive touch systems, the company said. The increasing functionality and sophistication of electronic devices drives the demand for touchscreens which are preferred for their ease of use and versatility. In addition they enable direct interaction without the need for input devices. Resistive touchscreens account for over 75% of the touchscreen market, due in large part to their lower cost and higher precision when compared to capacitive technologies. Another advantage is that they allow operation with fingernails or even while wearing gloves, unlike capacitive touchscreens that require a conductor or dielectric.

At Sensors Expo in Rosemont, IL, on June 7, Ruben Balbuena, Rohm senior product marketing manager, told Control Engineering that 8-bit internal preprocessing can perform many functions without waking the main processor for the device, saving power in mobile applications.

 

Those close to the development noted:

  • Resistive touch screens are used on lots of industrial HMI applications.
  • Capacitive devices don't work when gloves are worn or hands are wet or screen is dirty. Until now resistive touchscreen were limited to single touch operations, so common touchscreen gestures like pinch, spread, rotate, scroll were not possible.
  • Industrial systems could see a dramatic increase in functionality without replacing the touchscreen by designing in this new controller IC. 

Nick Ikuta, Rohm senior technical marketing manager, said, “Touchscreen panels are used in a wide variety of applications, including cellular telephones and car navigation systems. The functionality of electronic devices is increasing day by day and operation by touch panel is increasingly shifting toward pinch, spread and other intuitive finger gestures. Until now, in order to actualize functions like these, electrostatic capacitance type touchscreens were the only choice. With the new BU21023/BU21024 series, conventional 4-wire resistive touchscreen designs can be easily expanded to include dual-touch.”

The BU21023/BU21024 series ICs integrate a dedicated analog circuit and CPU for precise two-point coordinate and gesture detection. A calibration function is also built-in that minimizes the effects of panel variations during production as well as fluctuations in touchscreen device characteristics caused by temperature variations or time-based degradation.

- Edited by Mark T. Hoske, Control Engineering, CFE Media, www.controleng.com

Also see www.controleng.com/HMI.



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
Each year, a panel of Control Engineering editors and industry expert judges select the System Integrator of the Year Award winners.
Control Engineering Leaders Under 40 identifies and gives recognition to young engineers who...
Learn more about methods used to ensure that the integration between the safety system and the process control...
Adding industrial toughness and reliability to Ethernet eGuide
Technological advances like multiple-in-multiple-out (MIMO) transmitting and receiving
Big plans for small nuclear reactors: Simpler, safer control designs; Smarter manufacturing; Industrial cloud; Mobile HMI; Controls convergence
Virtualization advice: 4 ways splitting servers can help manufacturing; Efficient motion controls; Fill the brain drain; Learn from the HART Plant of the Year
Two sides to process safety: Combining human and technical factors in your program; Preparing HMI graphics for migrations; Mechatronics and safety; Engineers' Choice Awards
The Ask Control Engineering blog covers all aspects of automation, including motors, drives, sensors, motion control, machine control, and embedded systems.
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
News and comments from Control Engineering process industries editor, Peter Welander.
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
This is a blog from the trenches – written by engineers who are implementing and upgrading control systems every day across every industry.
Anthony Baker is a fictitious aggregation of experts from Callisto Integration, providing manufacturing consulting and systems integration.
Integrator Guide

Integrator Guide

Search the online Automation Integrator Guide
 

Create New Listing

Visit the System Integrators page to view past winners of Control Engineering's System Integrator of the Year Award and learn how to enter the competition. You will also find more information on system integrators and Control System Integrators Association.

Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Control Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.