Principle and advantages of touch splicing screen文章来源：华云视界 发表时间：2021-08-02
LCD splicing screen is a large display screen composed of multiple LCD splicing units. In practical application, in order to be more convenient to use, this kind of large screen can also add touch function like touch all-in-one machine and tablet computer. It is widely used in teaching, training, multi-function exhibition hall and other places.
Today, let's talk about the working principle of touch LCD splicing screen:
At present, two kinds of touch technologies are popular in the market, one is capacitive touch, the other is infrared touch. Capacitive touch is widely used in small-size touch screens, and LCD splicing screens in the market mostly use infrared touch technology.
The capacitive touch screen is a four layer composite glass screen. The inner surface and interlayer of the glass screen are respectively coated with a layer of ITO, the outermost layer is a thin layer of silica glass protective layer, the interlayer ITO coating is used as the working surface, four electrodes are led out from the four corners, and the inner ITO is the shielding layer to ensure a good working environment. When the finger touches the metal layer, a coupling capacitance is formed between the user and the touch screen surface due to the human electric field. For high-frequency current, the capacitance is a direct conductor, so the finger sucks a small current from the contact point.
The infrared touch is composed of infrared transmitting and receiving sensing elements installed on the outer frame of the touch screen. An infrared detection network is formed on the screen surface. Any touch object can change the infrared on the contact to realize the touch screen operation. The implementation principle of infrared touch screen is similar to surface acoustic wave touch. It uses infrared transmitting and receiving sensing elements. These elements form an infrared detection network on the screen surface. Touch operated objects (such as fingers) can change the infrared of the contact, and then be transformed into the touch coordinate position to realize the response of the operation.On the infrared touch screen, the circuit board devices arranged on the four sides of the screen are infrared transmitting tubes and infrared receiving tubes, which correspondingly form a horizontal and vertical cross infrared matrix. The LCD splicing screen realizes the touch function by adding a layer of touch box outside. It can be operated freely, simple and fast in different working environments.
With the continuous innovation and development of display technology, LCD splicing screen, LED large screen and OLED can cooperate with more equipment to effectively serve our life and change the development process of various fields of society; For example, the popular 5g technology and folding mobile phone are inseparable from the corresponding display technology in practical application, and they are closely related.
Advantages of touch panel screen:
1、Long effective service life
Why is the effective service life long, rather than just long service life? Some people may have such doubts, because the LCD splicing screen will not affect its display effect after 60000 hours of use for a long time, and will not become blurred. The running speed, response time and other aspects will not change greatly with the passage of time.
2、Energy saving and environmental protection
Some people have done experiments, put a splicing wall with the same area, and use the product to distinguish the large screen display of small spacing led and LCD splicing screen. The energy consumption of LCD splicing screen is far lower than that of other products, which is one of the reasons why LCD splicing has been nodded and called yes in terms of cost performance.
3、Support 7 * 24-hour operation
Due to the unique technology of LCD splicing screen, it can basically run without damage for 7 * 24 hours. However, there are not many large display screens, so in many monitoring, command and dispatching centers, LCD splicing screen is preferred in all walks of life
The liquid crystal splicing screen adopts the world's leading IPS screen technology to orient the liquid crystal molecules into an opaque mode. The light transmission is determined by the electrode perpendicular to the orientation direction of the liquid crystal molecules, and the light is firmly controlled inside the panel. This makes the LCD splicing screen less light leakage. In the moving picture, it realizes better contrast, makes the picture outline presented by the display screen clearer, and the display effect is much higher than that of the traditional PC or TV LCD screen.
When there is a problem with one splicing unit, the LCD splicing screen will not interfere with the work of other splicing units. Just like we take a splicing diagram and disassemble one, the others will remain there intact and will not be affected. This is also the reason why LCD splicing screens are popular, because some traditional large screens may have problems at only one point, All the others suffer.