Structure and Types of Capacitive Touchscreens

There are two main structures for projected capacitive (PCAP) touchscreens: a double-layer structure with X/Y electrodes on separate layers, and a single-layer structure with electrodes on a single layer. The double-layer structure is flexible for customization but thicker, while the single-layer variant is thinner with higher light transmission, making it suitable for mass production. The choice of material (glass or film) and the position of the sensor further determine the durability and performance of the screen.

Customization & Small Print Runs

Customization & Small Print Runs

The double-layer structure offers great design freedom. This makes this type highly suitable for the development of customized touchscreens and for production in smaller series where flexibility is more important than minimal thickness.

Mass production

The single-layer structure is the preferred choice for large-scale production, such as in consumer electronics, due to its thinner profile and higher light transmission. Although the sensor design is more complex, the efficiency benefits at high volumes are significant.

Sustainable Applications

Placing the sensor on the rear of the substrate protects it from scratches, dirt, and wear. This results in a highly robust and reliable touchscreen that is ideal for use in public or industrial environments.

Double-layer Structure

In this structure, the X and Y electrodes are divided across two separate layers of glass or film. This separation makes the design more flexible, but results in a thicker end product and slightly lower light transmittance.

Single-layer Structure

Here, the X and Y electrodes are placed on a single layer of glass or film, separated by an insulating layer. This results in a thinner, lighter screen with superior light transmission for a brighter image.

Material selection: Film vs. Glass

Sensors can be manufactured from film (thin, light, and flexible) or glass (more reliable and robust). Various combinations, such as Glass/Glass or Film/Film, make it possible to tailor the properties to the specific requirements of an application.

Integrated Sensor Positions

The sensor can be integrated directly into the LCD module using On-cell or In-cell technology. This eliminates layers, resulting in a thinner screen profile and improved optical performance due to less reflection.

Summary

There are two main structures for projected capacitive (PCAP) touchscreens: a double-layer structure with X/Y electrodes on separate layers, and a single-layer structure with electrodes on a single layer. The double-layer structure is flexible for customization but thicker, while the single-layer variant is thinner with higher light transmission, making it suitable for mass production. The choice of material (glass or film) and the position of the sensor further determine the durability and performance of the screen.

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. 

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