Difference between resistive touch screen and capacitive touch screen

Resistive Touch Screen


Definition: The full name of resistive touch screen, commonly known as "soft screen", the structure is divided into three layers, the inner layer is glass, the outer layer is a film, and the adjacent side of the film and glass are coated with ITO (indium tin metal oxide). Resistive screens can be divided into four wire, five wire, seven wire or eight wire touch screens, and the difference between these categories is the difference in screen bias voltage. The application of resistive touch screen in touch control machine, due to its technical principle of point-touch control, makes the machine touch more accurate. At the same time, in the pixel configuration, it can support HDMI 4K video transcoding, and the display effect is higher.


Working principle: the resistance screen is actually a sensor. When the resistance screen is operated, when the two layers of film and glass collide with each other, the current will have an impact, and the chip evaluates the pressure on the screen according to the data between the calculated force and the current. It is also because the resistance screen is forced to touch, so this principle leads to the resistance screen can only touch one point, it is difficult to achieve multi-touch. This principle also makes the resistance screen mostly used in harsh industrial use scenarios where there is much dust, large temperature difference, and gloves are required for operation.

Capacitive Touch Screen

The full name of capacitive touch screen, commonly known as "hard screen", is a four-layer composite glass screen, the first layer is ITO, to ensure the working environment, the second layer is glass, the third layer is also ITO coating, to use the working surface; The fourth layer is a protective layer of silica glass. It is well known that the main feature of capacitive touch screen is that it can achieve multi-touch.


Working Principle: Capacitive screen is actually the use of human body current induction work, can be understood as the need to touch the medium with bio-electricity to touch. In other words, the capacitive screen uses the lower layer to transmit signals to the upper layer, and when the upper layer is contacted by the conductor, the lower layer can quickly receive information and make calculations. Determine where your finger is touching and react. It is precisely because of this that the capacitive screen can not only support multiple points at the same time, but also greatly improve the sensitivity of hand touch. Therefore, capacitive screens are used in normal industrial application scenarios with no special requirements.


Post time: 2024-05-24 11:38:38
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