Know Your LED Display: The Difference Between Capacitive and Resistive DisplayPosted on Tuesday, January 19, 2016
A few years ago, LED display was a new comer in the Filipino market. After several years, it finally gained traction and wedged itself in the lives of millions of Filipinos. From televisions to smart phones, billboards, computer screens, and even interactive kiosks, LED display has truly become prolific in the Philippines.
The touch screen technology is one of the most popular display technologies used in market today. In fact, both smart phones and interactive kiosks use this technology for their respective functions. Despite this fact, phones and kiosks sometimes use a different touch screen display. A touch screen display can be capacitive or resistive. Check the difference between the two to know more about touch screen technology.
What is Capacitive Display?
Between the two screen display technologies, capacitive display was developed first. Then, almost 10 years after its origin, resistive touch screen display was created. A capacitive touch screen display is comprised of 2 layers of glass, separated by space. These are coated by a conductor called Indium Tin Oxide (ITO).
How does it work? Upon pressing your finger on the screen display, the electrostatic field changes. As soon as the change in the electrical field is made, a processor will determine the location where you pressed the screen. Basically, the electrical properties in the human body are used to operate a device with a capacitive screen display.
This means, though, that you cannot use gadgets with capacitive screens while you have gloves on or with a stylus that’s not capacitive. Despite that minor limit, it has a lot of advantages – one of which is durability. With resistive screen displays, frequently-used areas start to wear down after numerous uses. This is not the case with capacitive screens which – through constant innovations – are becoming more rugged and resistant to scratches and other damages.
What is Resistive Display?
Like capacitive screens, a resistive display is made up of several layers. Unlike capacitive displays though, only one of its layers is made up of glass. The topmost layer of a resistive display is made up of flexible plastic, and like capacitive screens, space separates these two layers. Each side of the glass and plastic layers are coated with ITO. Resistive display is designed in such a way that the coated parts are facing each other even with the gap between them.
How does it work? Unlike capacitive screens, resistive displays do not make use of our bodies’ electrical properties. Instead, as its name suggests, it depends on resistance. Upon pressing a device’s resistive display, you are pressuring its top layer to meet the adjacent layer. Once the two coated sides touch, voltage passes through, and your device ends up reading this as a touch in that location.
This means that you can use anything to input information in your device if it has resistive screen. You can use your fingers, you can wear gloves, use a stylus – anything as long as it creates pressure on the screen’s first layer. It has some disadvantages though like it doesn’t allow multi-touch gestures. Also, images displayed in resistive screens are less sharp compared to capacitive screens.
These days, touch screen technology is adapted in so many devices – from laptops to mobile phones, and interactive kiosks. Since capacitive and resistive displays are prominently used in many devices nowadays, it’s important to understand them to help you figure out how to operate a certain device based on its touch screen type.