Vandal-proof Touchscreens

Does your display application require a touchscreen that can withstand the challenges of vandal abuse? When your touchscreen is subjected to unattended public access interactivity, vandal proofing can be a constant battle. Unfortunately, there is no simple answer when seeking a vandal proof solution.

However, there are means of increasing resistance to vandal abuse which can generally be addressed in three broad areas: impact protection, scratch/abrasion protection and liquid ingress protection.

Impact and scratch/abrasion damage are minimized by use of added glass top surfaces. Polymers, such as polycarbonate which are highly impact resistant, provide additional protection against impact, scratch and abrasion destruction. Optical bonding, provided by Planar Systems, fills the gap between the protective glass and LCD, keeping out dust and moisture and providing liquid ingress protection.

In addition, glass lamination and glass heat tempering will improve resistance to breakage. This approah can be applied to SAW, surface capacitive, projected capacitive, camera IR and matrix IR touch screens. Newer touch technologies such as force activated technologies can use a variety of tranparent media.

Flexible displays – the next big thing?

Ok, so say we got rid off the newspapers with Apple iPad. Then there’s a research project being run in University of New South Wales in Australia for creating flexible display to give you back the ”paper” feeling, when reading your newspaper on a display rather than on paper. They investiage using flexible polymer-based backplanes printed on plastic substrates for low manufacturing costs, durable and flexible displays. But putting newspaper on a display and then creating a display, which is like a traditional newspaper: does it not sound a bit like one worker digging a hole and the other one following and filling it again? I know, we're saving tons of paper, but STILL! Whether you agree or not, this set me thinking: what are the real uses of a flexible display technology?
At Planar, we experimented with curved and twisted glass surfaces which we made a display with our electroluminescent technology. This technology has the advantage of being able to create transparent displays. Having curved transparent (TASEL) displays is something in the development stages. People who see our samples at the shows say: ”Great that it’s curved! But is it just solid glass, not flexible?” Hmmm no, not flexible. But where would you need it to be flexible?
Having a wristwatch which is a display on a flexible display surface, why not. Being able to actually turn the pages of a newspaper physically rather than just wiping my hand over the screen or waving in front of it, nice. Or for extraordinary design effects, well yes!
In EE Times in June Christoph Hammerschmidt writes about the flexible display technologies being the future of displays. His main argument for the success is that “flexible displays don’t break”. He continues promising 58% expected annual sales growth by 2018 for the flexibles amounting to over 8 billion US dollars, while others don’t grow at all.
YouTube seemed to have an answer waiting for me, in the form of a video by Plastic Logic, who incidentally work in cooperation with the UNSW in Australia on their flexible displays project, perhaps the same group who made the video..? The video is titled: ”Plastic Logic - Why Flexible Displays?”.



But to me this only shows “what are flexible displays like” and I still didn’t explain why and where just these qualities would be vital and needed where other displays couldn’t do the job. Perhaps the durability and light-weight could be appreciated in consumer applications such as mobile phones and reading devices, like E-Ink, or for professional users in the military.
What ideas do you have for the flexible display applications? Please send us your ideas either directly onto my e-mail or comment this blog post. Thanks!