Types of resistive touchscreens

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By Jim Badders | Jun 03, 2020
Example of a resistive touchscreen

In today’s world, touchscreens are omnipresent and expected by users on almost any interface system. Widely used in a variety of industries, there are many different types of touchscreen constructions available. Once you have decided to use a touchscreen, there are important design considerations to take into account. How should the touchscreen function when interacted with? Does it need to be durable enough for heavy usage and millions of actuations? Should it be incredibly precise and not require any calibration? Whether your biggest concern is cost, durability, or functionality, there are many different options.

The most commonly used touchscreens broadly fall into two categories: resistive and capacitive. In this blog, we will be focusing solely on the different types of resistive screens and their core advantages. 

What are resistive touchscreens?

Resistive screens are made up of two conductive and transparent layers: a flexible top panel (typically made out of polyester or PET) and a rigid bottom panel. An adhesive spacer lies between the two layers. When pressure is applied to the top panel, it makes contact with the panel below. This contact interrupts a continuous current flowing between the panels, where a grid of horizontal and vertical lines allows a controller chip to know what was touched and gauge input accordingly. Since the input is calculated through physical pressure causing the two layers to make contact, resistive touchscreens work well for any gloved or stylus usage.

Types of resistive touchscreens

  • 4-wire resistive touchscreen

The least expensive of all of the touchscreen options, 4-wire touchscreens are typically found in games, toys, and other inexpensive touchscreen applications. Since the accuracy is based on the top panel interacting with the bottom panel, any damage to the top panel will cause the accuracy to degrade. This generally makes them less reliable after heavy usage or many actuations. 4-wire touchscreens also have to be calibrated frequently as they get used to ensure that they register the correct input.

  • 8-wire resistive touchscreen

Very similar to 4-wire in durability and usage, the only difference with an 8-wire screen is additional wiring. This additional wiring keeps the screen more precisely calibrated and allows it to auto-calibrate, meaning that it requires less maintenance to maintain accuracy than its 4-wire counterpart.

  • 5-wire resistive touchscreen

Despite the similar name, 5-wire touchscreens are significantly different from the 4-wire and 8-wire variations. 5-wire screens measure input from the bottom panel only, not in tandem with the top panel. This means that regardless of any damage to the top layer, the usage of the touchscreen and accuracy of input won’t degrade. This makes them more durable and they generally last through many more actuations than other resistive options.

  • Resistive multi-touch screen (RMTS)

 Resistive multi-touch screens (RMTS) are the only type of resistive screens that allow for multiple-touch functionality, such as pinching, zooming, or rotating. Similar to 5-wire screens, the bottom layer is the only layer that measures input, meaning that they’re more durable and well-suited for a rugged environment. EMI mesh can also be applied to the front surface, protecting internal components from outside electrical activity. This, in combination with the durability, makes them favorable for military and industrial applications.

Resistive touchscreens are a great option for a wide variety of applications and industries. To learn which touchscreen option is right for your next product, take a look at our front panel integration and bonding capabilities or request a free consultation with our technical experts.