What's the Difference Between the Capacitive Touch Screen and and Resistive Touch Screen in Touch Cash Registers?

With the development of mobile Internet and mobile payment, offline stores and online shopping malls have gradually merged to form a closed-loop business ecosystem, forcing merchants to upgrade store management. Smart cash registers, as the key entry point for online and offline integration, are a must for stores. At present, the smart cash register on the market is trying to move closer to the mobile phone in terms of operating experience, and the cash register can be directly operated by touching the screen.

What is the difference between a resistive touch screen and a capacitive touch screen in a touch screen cash register?

The commonly used screens of cash registers are divided into five types: resistive, capacitive, surface acoustic wave, optical, and infrared. The resistive and capacitive screens are now mainly used in the market.

1. The structure and working principle of the resistive screen 

Simply put, the resistive touch screen is divided into two layers, separated by a spacer in the middle. When the two layers collide with each other, the current will have an impact. The chip calculates the data between the force and the current to determine which position on the screen is under pressure, and then react.

The working principle of the resistive touch screen is because the resistive screen needs to collide with the upper and lower layers before it can react. Therefore, when two points are pressed at the same time and the pressure on the screen becomes unbalanced, it is easy to cause errors in touch. This also makes it difficult for resistive screens to achieve multi-touch. Even if multi-touch is achieved through technical means, the sensitivity is not easy to adjust, and point A is often sensitive and point B is dull. In addition, because the resistive touch screen requires a certain amount of pressure, the surface material will wear out after a long time, or the upper and lower layers lose elasticity and cause poor contact, which will also affect the normal service life of the product.

2. The structure and working principle of the capacitive touch screen

In fact, the capacitive screen and the resistive screen have two upper and lower layers, but the difference is that the capacitive screen uses the lower layer to transmit signals to the upper layer. When the upper layer is contacted by the conductor, the lower layer can receive the information and make calculations, so the two layers of screens do not need to be in direct contact, and only the information received by the lower layer is used to determine where the finger touches.

Because of this, the capacitive touch screen can not only support multi-touch at the same time, but also greatly enhance the sensitivity of touch. Since the human body itself is a conductor, when a finger touches the screen, the capacitive screen can react immediately.

In contrast, as a cash register with a higher frequency of use, capacitive touch screens can better meet the efficient cash register needs of stores.