We’ve come a long way since the late 1940’s when music industry pioneers first developed touch-sensitive synthesizers, paving the way for later advancements in the 1960s and 70s to pair touch technology with a graphical display to create the first touch screen computer. Today, we have much more complex systems available such as resistive and capacitive touch screen computers.
Both resistive and capacitive touch screen panel PCs are very popular among industrial PC users, which is why many of the models in our panel PC line are available in both capacitive and resistive versions. The continued growth of touch screen use means that we often hear the question, “Which type should I choose?”. There are distinct advantages to each type, so let’s take a quick look at how they work and where each excels.
Capacitive touch screen panels consist of an insulator (such as glass) coated with a transparent conductor. Since the human body is also an electrical conductor, touching the surface of the screen results in a distortion of the screen’s electrostatic field, measurable as a change in capacitance. The location of this disruption is identified and sent to the touchscreen controller for processing.
The most common use of capacitive touch screen computers today is in smartphones and tablet PCs. However, in the industrial computing space, kiosk systems and digital signage solutions commonly use capacitive touch screens due to their accuracy and the light touch necessary to register contact.
Over the last decade, capacitive touchscreens have gained popularity in a wide range of industries. Now you can get cash from the ATM, select your airplane seat, and buy your movie tickets all from capacitive touch screen kiosks. For consumer transactions, the capacitive touch screen has become the go-to solution because of its intuitive and accurate user experience.
Resistive touch screen computer panels consist of two transparent sheets with a small gap between them. Each sheet is coated with a transparent conducting material and a uniform electrical resistance value is applied to the surface of each sheet. As the top layer gets pressed, it contacts the bottom layer. Electricity is conducted and the location of the conduction point is detected and sent to the touchscreen controller for processing.
The physical pressure required to operate resistive touch screens means they can be used while wearing gloves. This is a major advantage for food production, factory automation, and healthcare applications where these types of touchscreens are most common.
Resistive and capacitive touch screen panel PCs process information using different technology, but the convenience they offer in Human Machine Interface (HMI) applications has made them one of the largest growth areas for industrial PCs. The choice between these two distinct touch panels will depend on your specific application, but if you have questions about which type of touchscreen is right for your project, our solution specialists can help you make the right choice. To check out our full line of panel PCs, click here.
Note: This blog was originally published on March 1, 2016 and updated on August 22nd, 2022.
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