What are the types of touch screen products
December 2, 2024
In our daily life, PCAP touch screen, Curved touch screen, USB capacitive touch screen, Multi touch screen and many other touch screen have already become an important part, which is used in many applications. But How many types of touch screens do you know? Today let's talk about the various types of touch screen.
- 1. Resistive touch screen
The basic structure consists of two layers of conductive films, usually a layer of glass or hard plastic as the base layer, coated with a conductive layer (ITO, indium tin oxide) on the surface, separated by tiny insulation points in the middle. When the user touches the screen, the two layers of conductive film come into contact, and current is conducted through the contact point to determine the touch position.
Advantages:
(1)Low cost, simple making art.
(2)Multiple touch modes,supporting fingers, capacitve pen and even glove to touch.
(3)Good durability, suitable for harsh environments.
Disadvantages:
Low light transmittance affects the display effect of the screen. The accuracy and response speed are relatively low. The ability of multi touch is limited, making it difficult to achieve complex multi gesture operations.
Applicable scenarios:
Resistive touch screens are suitable for low-cost, low precision applications such as early smartphones, industrial control panels, Industrial All-in-one PC, electronic calculators, etc.
Capacitive touch screens utilize the conductivity of the human body to determine the touch position by detecting changes in the surface capacitance of the screen. When a user touches the screen with their finger, the finger forms a capacitive coupling with the screen, causing changes in local capacitance values. By measuring these changes, the touch point can be accurately located.
Advantages:
High precision and sensitivity, supporting multi touch, high transparency, fast response speed, and smooth user experience.
Disadvantages:
The cost is relatively high, and only conductive objects can be used for operation, and ordinary handwriting pens or gloves cannot be used. Performance may be affected in humid or extreme temperature environments.
Applicable scenarios:
Capacitive touch screens are widely used in high-end electronic devices such as smartphones, tablets, touch screen computers, and car navigation systems.
- 3. Infrared touch screen
Infrared touch screens utilize infrared technology to achieve touch functionality. The screen is surrounded by infrared emitting and receiving tubes, forming an infrared matrix. When the user touches the screen, it blocks the transmission of some infrared rays, and the touch point is determined by detecting the interruption position of the infrared rays.
Advantages:
Suitable for large-sized touch screens, with relatively low cost. Not affected by current, voltage, and static electricity interference, with good stability. This type of Industrial touch screen can work in harsh environments, such as outdoors or industrial settings.
Disadvantages:
The accuracy and response speed are not as good as capacitive touch screens. Infrared radiation is easily interfered by external light, affecting touch accuracy. It is necessary to keep the screen borders clean to prevent blocking of infrared radiation.
Applicable scenarios:
Infrared touch screens are suitable for large-sized touch screen devices, such as self-service terminals, electronic whiteboards, interactive display walls, etc.
- 4. Optical touch screen
Optical touch screens utilize optical sensing technology to achieve touch functionality. Optical sensors and light sources are installed below or around the screen to determine the touch position by detecting changes in light. When a user touches the screen, the propagation path or intensity of light changes, and optical sensors locate the touch point by capturing these changes.
Advantages:
High precision, capable of achieving precise touch operations. This type of touch screen supports multi-touch, which is convenient for users to perform complex gesture operations. And It has high transmittance and good screen display effect.
Disadvantages:
High cost and complex manufacturing process. Sensitive to ambient light, additional light calibration may be required.
Performance may be affected in strong or low light environments.
Applicable scenarios:
Optical touch screens are suitable for applications that require high precision and good display effects, such as high-end smartphones, tablets, touch screen computers, etc.