What is the sensor of projected capacitive touch screens?

In electronic devices such as industrial all-in-one machines, commercial displays, tablets, and car displays, projected capacitive touch screens have become the main way of human-computer interaction. The touch screen function chip is a key component for realizing the core functions of the projected capacitive touch screens. As one of the core layers of a touch screen, functional chips directly affect the sensitivity, accuracy, and durability of touch control. Such an important component, but few people can explain clearly what the touch screen function chip is? What role does it play in touch technology?

1. Basic composition of projected capacitive touch screens functional chips
Touchscreen functional chips are usually composed of multiple layers of materials, mainly including:
Conductive layer: using conductive materials such as ITO (indium tin oxide) or metal mesh, used to sense input signals from fingers or touch pens.
Substrate layer: usually PET film or glass, providing structural support and optical transparency.
Optical adhesive layer: used to bond different functional layers while reducing light refraction and improving display clarity.

2. The role of functional chips in touch technology
Signal sensing: When a finger or stylus touches the screen, the conductive layer of the functional chip will detect changes in capacitance or resistance and transmit the signal to the controller for precise positioning.
Anti interference optimization: Modern functional chips typically have anti electromagnetic interference (EMI) design to ensure stable operation in complex electronic environments.
Durability improvement: Through special coating treatment, the functional sheet can have anti scratch, anti fingerprint, anti glare and other characteristics, extending the service life of the projected capacitive touch screens.
 

3. Application of different types of functional blocks
projected capacitive touch screens function chip: suitable for consumer electronics such as smartphones and tablets, supporting multi touch and sensitive response.
Resistive touch screen function chip: commonly used in industrial control equipment, wear-resistant, can be operated with gloves or a stylus.
Car touch function chip: It has high durability and high temperature resistance, suitable for complex environments inside the car.
 

4. Solution of Shenzhen Xinlilai Touch Technology Co., Ltd
As a professional touch screen manufacturer, we offer a variety of customized functional chip solutions, including:
-High transmittance functional sheet (transmittance ≥ 90%) ensures clear display effect.
-Flexible functional sheet, suitable for foldable devices.
-Explosion proof functional sheets are used in scenarios with high safety requirements.
 

Although the projected capacitive touch screens function chip is not eye-catching, it is a key guarantee for the touch experience. We, Shenzhen Xinlilai Touch Technology Co., Ltd., are committed to developing high-performance functional chips, providing customers with more sensitive and durable touch solutions, and also supporting customized services. Please feel free to consult at any time.