Ask Touch Guy!

Do you have a question for Touch Guy?

Send him an e-mail at asktouchguy@touchintl.com.

I’m curious about flexible touch screens – why are there not more in the market and what are the challenges and limitations associated with them? What design considerations do I need to be aware of when integrating them?

Dear Mike: Ancient history, my man.  Curved and flexible, I guess is the new “flat” which is what everybody has wanted in touch screens for that last ten years. If bell bottom pants can come back (they are called “flairs” now), then why not curved touch screens?  In the days of CRTs, all touch screens […]

My engineers claim gestures on multi-touch resistive do not work nearly as well as they do on projected capacitive (PCT) used in a variety of consumer devices, like the iPhone – why is this? Have there been any recent breakthroughs with resistive multi-touch? I would appreciate any new input on this subject.

Hi Alex: When you are comparing iPhone/iPad projected capacitive (also called PCT or P-Cap) to any other (even identical) projected capacitive sensors, you may not find the performance to be as good as Apple ’s product.  How can this be?  It is because Apple has had a really big head-start (as in years).  You and […]

I’m kind of new to the touch screen world and am trying to figure out why it is so difficult to get large (over 22”) multi-touch resistive and projected capacitive touch screens. Also, what are the big advantages and performance differences between the competing multi-touch technologies?

Hi Jim: So you want to know about big ‘uns? Projected capacitive, our favorite multi-touch technology, has pretty much topped out at 32 inch diagonal sizes.  There are bigger ones available, but they have those annoying little wires that nobody likes to see. In the realm of large format multi-touch, we find that infrared, camera […]

Can you please explain what sputtering and micro-etching are and how are they used in touch screen manufacturing to impact touch performance?

Sputtering and micro-etching are complimentary processes that are often used to reduce touch screen borders and package sizes and ultimately improve touch performance. “Sputtering” (aka known as suck-and-spit by the inventor) is a process by which an opaque material, usually indium tin oxide (ITO) is put onto glass or plastic, in a vacuum, resulting in […]

I’m working on an open source 17″ tablet for the DIY 3D printing community and am in desperate need of a 17″ – 17.1″ USB multi-touch screen overlay with a 16:9 or 16:10 aspect ratio. So far, I am only coming across single touch resistive and IR multi touch panels. We only really need dual touch panels with as good light transparency as possible, as these are graphics editing machines we are making. Projective capacitive panels would be the ideal technology I assume. How can I find such a beast?

So you want a 17 inch projected capacitive touch screen and are having a tough time finding one? You have chosen wisely, because for the printing business, you will want the super sharp image that you get using this optically clear technology. Even though Touch International makes projected capacitive sensors up to 22 inches, I […]