Capacitive Touch Through Glass
There are two main forms of touchscreen technology – resistive and capacitive. Resistive touchscreens are perfect in settings where the environment and usage may be more testing, such as publicly used touchscreen kiosks.
Capacitive touchscreens have become more popular and are more widely used in our everyday devices – cellphones and tablets for example. The reasons for this is an increased responsiveness and potentially higher resolutions can be achieved over resistive touchscreens.
What Does Capacitive Touch Mean?
To answer this more easily, it would be better to understand the technology behind capacitive touch through glass.
At ITO Touch, we use an ITO (Indium Tin Oxide) coating in our capacitive touch screen production.
ITO is both transparent and electrically conductive, making it ideal for use in capacitive touchscreens. The ITO coating is integral to the device being able to register a touch (or command).
As we mentioned, the coating is conductive, meaning electricity can pass through it. Touching the ITO coated screen will draw some of its voltage to your finger. The device will register this change in voltage (the touch, pinch or swipe) as a command.
To answer the question, in short – when the voltage changes, the capacitive touchscreen device will identify this change of capacitance as a touch command.
Capacitive Touch Through Glass Limitations
The only real limitation to capacitive touch screens is that they require a charge carrying pointer – AKA your finger.
Capacitive touch screens will not register your touch commands if you are wearing gloves. Not a huge deal as you can get specialist conductive gloves or conductive pointers.
Do you need more information?
Why not get in touch with us? We would be happy to assist with any queries concerning capacitive touch through glass, or any other enquiries regarding our ITO applications.