With the large-scale use of capacitive touch screens on mobile phones, people have felt the excellent touch experience brought by the capacitive touch screen. At the same time, the man-machine interface with a capacitive touch screen also has the advantages of fashionable appearance and easy cleaning. With the progress of technology, some problems of using the capacitive touch screen in the industrial field have been solved step by step.

One. The problem of large size

Due to the antenna effect, the larger the capacitive touch screen size is, the more difficult it is to improve the anti-interference and sensitivity, and it is easy to have a mistouch operation due to the capacitive touch screen itself. In industrial LCD products, the integrated touch panel and advanced technology have successfully overcome this problem. At present, industrial-grade products can achieve the maximum 18.5-inch industrial grade capacitive touch screen stability.The integrated panel refers to the capacitive touch screen and the front tempered glass panel through a special process. In this way, the following problems can be solved:

A. Solve the problem of the sensitive air gap between capacitive touch screen and isolator, which will greatly reduce the mounting requirements and make production easy;

B. Suitable for application environments such as wearing gloves or having dirty hands;

C. When set to the highest sensitivity, the touch screen will not misoperate due to high sensitivity.

Two. Thick protective cover problem

In order to protect the touch screen or LCD from external forces and unclean environment, thick glass or plastic protective cover is often placed on the operating panel used in the industrial field. A tempered glass panel with a maximum thickness of 9mm and an acrylic panel with a thickness of 6mm can be installed before the capacitive touch screen.

Three. Glove problem

Industrial environments often require the operation of machines with gloves on. While this is not a big problem for mechanical buttons, it can have a huge impact on capacitive touch solutions. Capacitive touch screens can be used to wear plush gloves in winter and work normally. Rubber gloves, plastic gloves, and cotton gloves commonly used in industry can be used to operate the touch screen normally. A small amount of water or other dirt on the gloves will not affect the normal operation of the capacitive touch screen.

4. Outdoor use

Considering that many industrial application environments are outdoors, there will be strong light, ULTRAVIOLET light, and other interference. In the past, if the capacitive touch screen is used in the home for a long time, it will appear an aging phenomenon, leading to the capacitive touch screen can no longer be used normally. On the capacitive touch screen, the function of CG anti-dazzle and UV protection is adopted.CG anti-glare refers to that the touch screen can diffuse the light source under strong light, thus reducing the intensity of light reflected directly from the touch screen to the human eye.UV protection, or UV protection, is a special coating that prevents UV light from passing through the capacitive touch screen glass, greatly reducing the impact of UV light on the device.

Mechanical stability problem

Industrial grade capacitive touch screens are G+G process.G+G refers to Glass+Glass, which means the capacitive touch screen is composed of a double layer of tempered glass, rather than a single layer of tempered Glass+ organic coating. Therefore, the industrial capacitive touch screen is also very reliable in mechanical stability.

Beijing STONE HMI focuses on the industrial display screen, Industrial touch screen, and optical lambing products research and manufacturing, products are widely used in medical equipment, industrial terminals, Internet of Things terminal, and smart home.


The introduction of large capacitive touch screen into the industrial field