How a capacitive touchscreen works

A capacitive touchscreen has a conductive surface that maintains an electrostatic field. A human finger, which is conductive, disrupts this field when touched. Sensors detect this change in capacitance and thus determine the touch location. This technology is the standard for modern smartphones and tablets because of its accuracy and multi-touch capability. Non-conductive objects, such as plastic or regular gloves, therefore do not work unless they are specially designed with conductive materials.

Smartphones and tablets

Smartphones and tablets

Capacitive technology is the standard for modern smartphones and tablets. It enables a highly direct, smooth, and responsive user experience, which is essential for operating mobile apps. Features such as swiping and pinch-to-zoom are directly dependent on the precision and multi-touch capabilities of this type of screen.

Information kiosks & POS

Public kiosks, ticket machines, and point-of-sale (POS) systems often use capacitive screens because of their durability and reliability. Since no physical pressure is required, they are less susceptible to wear and tear from intensive use. The glass top layer is also easy to clean and scratch-resistant.

Modern Laptops

Many contemporary laptops and 2-in-1 devices are equipped with a capacitive touchscreen. This provides an additional layer of interaction alongside the traditional keyboard and trackpad, which is useful for creative tasks, presentations, or using tablet mode in convertible models.

Guiding principle

The technology works by detecting a change in electrical capacitance. Only objects that conduct electricity, such as a human finger or a special stylus, can activate the screen. This prevents accidental touches from, for example, a sleeve or other non-conductive objects.

Multi-touch support

Unlike older resistive technologies, capacitive screens register multiple touch points simultaneously. This is a fundamental feature that enables complex gestures such as pinching to zoom in and out, rotating, and navigating with multiple fingers.

High durability

Because the sensor layer is protected by a glass top layer and operation does not require physical pressure, these screens are highly durable. They are more resistant to scratches, liquids, and dirt than screens with a flexible plastic top layer, making them ideal for intensive daily use.

Excellent image quality

The glass top layer and highly transparent conductive materials provide superior optical clarity. Up to 90% light transmission is possible, resulting in a sharper, brighter image with more vivid colors compared to resistive screens, which often produce a slightly blurrier image.

Summary

A capacitive touchscreen has a conductive surface that maintains an electrostatic field. A human finger, which is conductive, disrupts this field when touched. Sensors detect this change in capacitance and thus determine the touch location. This technology is the standard for modern smartphones and tablets because of its accuracy and multi-touch capability. Non-conductive objects, such as plastic or regular gloves, therefore do not work unless they are specially designed with conductive materials.

Do you have more questions?

At Dytos, we understand that each industry has specific requirements for touch solutions. That's why we offer a wide range of products and services designed to meet these diverse needs. 

Fill out the form.
By submitting this form, you consent to the storage and processing of your data so that we can contact you with relevant information and offers. More information can be found in our privacy policy.
Dytos

HMI Solutions

COVER GLASS

Projected Capacitive Touch Screen

touchscreens

Displays- en Embedded boards

displays

Display Optical Bonding Metalframe Taped

tape-optical bonding

en_USEnglish

Search