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Converting TFT into Touch Screen

By josephjames10 ·
I want to use my Compaq 1501 TFT monitor as touch screen. Is there any software available to achieve it. I do not want to use any hardware.

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by JamesRL In reply to Converting TFT into Touch ...

It isn't possible to create a touchscreen without additional hardware.

A touchscreen has to have a method of determining where the finger is touching - some sort of sensor. That sensor has to be callibrated - I've used kiosks where they have been out of alignment and they have been very difficult to use.

I've had experience with infared, and acoustic technologies in kiosks I've worked on. Embedded wire technology is the old tried and true.

This site will give you a lot more detailed information. They also sell monitor add ons where you can add touch screen capability to existing monitors.

Hope that helps.


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by TheChas In reply to Converting TFT into Touch ...

The only thing I can add, is that I would NOT convert ANY standard LCD monitor to a touch-screen unless the adapter kit includes a panel that is placed over the screen.

Touching the face of an LCD screen repeatedly is a good way to damage the display.

As stated in the first answer, there is NO software only solution to convert ANY standard display into a touch screen.
Some form of sensor needs to be part of the face of the monitor to have a touch screen.

The least hardware intensive method would be to implement something similar to the old Nintendo pistol and rifle.
They used a triggered light sensor in the gun that responded to a bright spot on the screen.

If you had software that scanned a bright spot onto the screen and a light sensor built into a wand with a button switch on it, the software would be able to see which section of the screen was bright when the button was pressed.
Eloquent, no.
"Off the shelf", no.
Cheap, yes.

TFT is the technology used for the LCD, and has nothing to do with touch.

From the Webopedia:
"Short for thin film transistor, a type of LCD flat-panel display screen, in which each pixel is controlled by from one to four transistors. The TFT technology provides the best resolution of all the flat-panel techniques, but it is also the most expensive. TFT screens are sometimes called active-matrix LCDs"


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by josephjames10 In reply to Converting TFT into Touch ...

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