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Resistive touch screen LCD for vending ?

Vend_d

New member
Hello everyone at Crystalfontz,

I design electronic systems and one of my customers is showing interest in resistive touch screen. The customer is a vending machine manufacturer. We are thinking about a 240x128 or maybe a 320x240 Graphic LCD.

I used your displays before for vending machines but never with touch screens. What are the mechanical details on the resistive touch add on ? Do you put something between the LCD glass and touch membrane ? If not, everytime a finger is touching the resistive membrane it's pushing against the LCD glass.

How strong are the touch screens ? What do you think about public use ? Will be used in coffee shops and offices.

Looking at your online catalog, i can see that not all graphic LCD are available with touch screens. More availability if I buy some quantities ?


Thank you.
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CF Tech

Administrator
We can do touch screens for some modules that are not shown. You would have to write support@crystalfontz.com to see if one is available, and the quantities required.

For touch screens exposed to the public in an unsupervised place, I think there are capacitive models that allow tempered glass to be exposed to the user.

For supervised (like signature capture) resistive touch screens are often used.
 

Vend_d

New member
I've been reading on touch technologies for the past few days. Acoustic pulse, resistive, projected capacitive, surface capacitive, surface wave and infrared.

I agree with you : capacitive would be much better for public use. Resistive is too fragile. The problem is where to buy. All I have found on the net are manufacturer that build custom screens. They need large quantities orders. I'm planning on buying 50 to 100 a year. Not enough to have something cheap custom build.

I also found all in one products, industrial computer + color lcd + touch. Not good for me. I need a small monochrome lcd and a separate touch membrane and i'll build my own system around it.


I think i'm going to forget the touch screen for this project and go with good old fashion push buttons.


Thank you for your reply.
 
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