Touch Screens: Resistive vs. Capacitive

  • Home
  • Blog
  • Touch Screens: Resistive vs. Capacitive

Design Mark Industries_Touch Screens_Technology_blog_social media_2png

 Different Touch Screens offer different capabilities.

Your smartphone’s screen lets you easily tap or swipe icons, pinch or zoom images. This capacitive Touch Screen is incredibly clear and responsive! Now think about the office printer. Remember that you need to push down on the Touch Screen’s “Copy” icon with a good bit of pressure. Since this is a resistive Touch Screen, you cannot swipe or pinch the printer’s icons. In a nutshell, this describes some of the differences between resistive and capacitive Touch Screens.

 

Resistive vs. capacitive: Which is best for your application?

As with any technology, there are pros and cons for resistive and capacitive Touch Screens. To help you choose the right technology for your project, we’ve compiled the following “Touch Screen Comparison Chart: Resistive vs. Capacitive.”

 

                                 Touch Screen Comparison Chart: Resistive vs. Capacitive

 

Resistive Touch Screens

Capacitive Touch Screens

How the technology works

Resistive Touch Screens have a conductive bottom layer of glass or film and a conductive top film layer, separated by transparent spacer dots. Voltage is applied to the conductive surface. When pressure is applied to the top layer, it is deflected and makes contact with the bottom layer, which results in a voltage change, which is detected by the controller. This is the preferred solution for low-cost applications.

 

Capacitive Touch Screen design has an all-glass construction with a greater than 9H surface hardness. A transparent conductive indium tin oxide (ITO) coating is distributed over both sides of the glass substrate. An electrode pattern is printed around the perimeter of the glass to generate an alternating current over the top conductive layer. The touch of a conductive probe draws the current to the specific point of contact. The controller then calculates the location of the touch.

 

Touch points

Single touch only; does not support multi-touch or gestures

Supports multi-touch and gestures such as tap, swipe, pinch, zoom

 

Sensitivity

This Touch Screen requires pressure (you must push down on an icon, not simply touch it)

 

Highly touch sensitive; this Touch Screen can sense the proximity of a finger or specialized stylus

 

Clarity

Contrast, clarity, and screen brightness is very good but not as crisp and clear as capacitive due to the air gap and multiple layers

 

Enhanced optical clarity with a bright and sharp display

Touch object

Activation by finger, gloved hand, or stylus (no specialized stylus required)

 

Activation requires conductive materials such as a bare finger or capacitive stylus (specialized stylus with conductive tip)

 

Sensitivity to environmental factors

Excellent durability: Higher resistance to dust, chemical cleaners, and the elements (e.g., rain and snow) due to being sealed; good resistance to scratches, however, a severely scratched screen will impede performance

 

High durability: Less resistant to dust, chemical cleaners, and the elements (e.g., rain and snow); highly resistant to scratches due to the greater than 9H surface hardness

 

Power requirements

Lower power requirements

Higher power requirements

Example applications

Industrial controls, handheld devices, ATM machines, office equipment, casino gaming machines, point-of-sale (POS) kiosks, medical devices and diagnostic equipment, etc.

 

Smartphones, handheld devices, simulation and training equipment, industrial / military / government controls

 

 Design_Mark_LLC_Request a Quote_Call-to-action

Still have questions? Contact Design Mark for technical assistance.

We encourage you to discuss your project in detail with one of our technical designers or engineers. Our Touch Screen 

professionals are backed by years of hands-on experience. They’ll help you determine which technology is best for your application: resistive or capacitive.