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What is capacitive touch screen?

What is capacitive touch screen?

2021-05-25

There are several types of touch screens on the market, such as capacitive screens, resistive screens, infrared touch screens, and surface acoustic wave screens. Among these types, capacitive screens and resistive screens are more favored by customers. The significant difference between a capacitive screen and a resistive screen is that the capacitive screen can achieve multi-touch, while the resistive screen is one-point touch.

Now that the capacitive touch screen is so popular, what are the advantages in use? Top One Tech will lead you to have a look basing on the customer's great demand for ordering on capacitive touch screens

What is capacitive touch screen?

The capacitive touch screen works by using the current induction of the human body. The capacitive touch screen is a four-layer composite glass screen. The inner surface of the glass  and the inter layer are each coated with a layer of ITO. The outermost layer is a thin layer of silica glass protective layer. The inter layer ITO is used as the working surface, and the four electrodes are led out from the four corners. The inner layer of ITO is a shielding layer to ensure a good working environment. 

capacitive touch screens

                                          

What are the advantages of capacitive touch screens?

First, the advantages of technical principles

Capacitive touch screens react through electric current and do not require pressure to generate signals. To put it simply, the screen is divided into blocks, and a set of mutual capacitance modules are set in each area to work independently, so the capacitive screen can independently detect the touch conditions of each area, and after processing, multi-touch can be realized . Since the capacitive touch screen needs to sense the current of the human body, only the human body can operate it, and it will not respond when touched with other objects, so the possibility of accidental touch is basically avoided.

For the needs of industrial displays, most users also prefer the choice of capacitive touch screens. Capacitive touch screens made by Top One Tech not only support ten-point touch, but also have outstanding electrostatic anti-interference, which makes them have outstanding advantages in scenarios such as power cabinets.

capacitive touch screen

Second, the calibration is simple

Capacitive touch screens can be installed and used only once or without calibration after production, while resistive technology requires conventional calibration. After the capacitive touch screen is installed on the industrial display, the manufacturer only needs to perform a simple touch operation on it to check whether the screen and the internal components of the machine are well connected, and it can be turned on without repeated calibration.

Third, longer service life

In resistive touch screens, the upper ITO film needs to be thin enough to be flexible so as to bend downward to contact the lower ITO film. Such repeated bending operations will cause loss of the touch screen and reduce its service life. The components in the capacitive touch screen do not need any movement, so the capacitive touch screen will have a longer service life. In addition, it has better performance in terms of dust resistance, water resistance, and wear resistance.

Fourth, lower power consumption

From the perspective of touch technology, capacitive technology is much stronger than resistive technology in terms of light loss and system power consumption. Therefore, many industrial displays are also equipped with capacitive touch screens.

Fifth, low maintenance costs

Capacitive technology is wear-resistant, has a long service life, and has low maintenance costs. Because the capacitive touch screen supports multi-finger touch, the damage to the screen is small, and the capacitive technology itself has the characteristics of wear resistance and long service life, the user can have low maintenance costs when using it.

Sixth, the reaction is more sensitive

Based on the technical principle of multi-touch of capacitive touch screen, the number of capacitive screen touches is more than 50 million times, the response time is less than 5ms, and the screen error is less than 1%. The sensor-like screen response is more sensitive, allowing users to have better experience.

Through the above content, I believe that everyone has already understood the advantages and principles of the capacitive touch screen. There is no doubt that it is more advanced than the traditional similar equipment, and can judge a lot of complex actions.


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