Capacitive sensors are great – highly reliable and have a wide range of functions. You can’t argue with their usefulness in household electronics, especially as panels in such products are becoming thinner and lighter with almost every iteration. In the automotive world, however, this isn’t exactly desirable.In this industry, sensitive sensor technology is subject to stricter requirements, both in terms of service life and environmental influences.
For example, display and touch systems in automotive applications must be much more robust in several important ways:
Where EMC requirements are concerned, ghost touches must stay within an irradiation of 150V/m. With our new touch controller this is no longer a big challenge, however, the ability to limit all radiation remains significant, especially at lower frequencies. In automotive applications, radiation is measured at lower frequencies than in industrial projects and this is a big problem for PCAP, as the working frequency of the touch is exactly in this frequency range.
To meet these challenges, we have designed a highly robust touch solution that passes all necessary EMI/EMC tests in the automotive field. We have adapted the hardware design, focusing on the FPC of the touch and created a new firmware in the touch IC, based on the SIS 95xx family. This includes new security mechanisms, which allow the host to check if the touch IC is still working, as well as communication, touch functionality, FPC functionality and data consistency without waking it from sleep mode. Our special Touch with 2 FPC, (also based on SIS 95xx) even allows for checking the consistency of the touch coordinates against Ghost Touches. We talk about this in more detail in a recent article.
In this picture, we have an example of a fully installed HMI device – a guidance system for agricultural machinery. As you might imagine, a touch solution in such an environment will encounter multiple variables in temperature, light, interference and movement and ours successfully negotiates all of these – often simultaneously – quite literally out in the field.
Are you familiar with Smart Surface Technology? If not, you should be. It’s nothing short of a breakthrough in displays and combines sleek design with the superb functionality that is the hallmark of Avnet Displays.
SimplePlus is an old friend to so many of our customers, which is why we are happy to adapt and modify this well-loved and reliable display to meet their changing requirements. Our latest addition to the range turns up the brightness on the popular 10.4” model.
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Stefano Rosato - Director, Technical Touch Technology at Avnet Stefano Rosato is director of technical touch technology in the Display Solutions team at Avnet. Stefano helps customers solve touch challenges and supports customers through the whole design-in phase for touchscreen integration. With deep knowledge about PCAP technology, along with its design-in rules, tuning and pattern designs, Stefano is a leading expert in the touchscreen industry.Read More |
Our Avnet Displays come in a range of form-factors and our display-experts are on hand to guide you in the creation of display or touch solutions that meet your requirements. Find out how Avnet Displays can propel your product innovation and get in touch today.