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What Is LCD Touch Screen? What Are Its Features?

With the development of technology, more and more products are focusing on artificial intelligence and want to achieve human-machine interaction through artificial intelligence. This process relies heavily on the help of LCD touch screens, which are an important medium for realizing human-machine interaction. Today, we will introduce the LCD touch screen module.


Understanding of LCD touch screen


The LCD touch display screen works by utilizing the body's electric current induction. It is a four-layer composite glass screen, and each inner and sandwich layer of the glass screen is coated with a layer of ITO. The outermost layer is a thin layer of silicon glass protective layer, and the sandwich ITO coating serves as the working surface. There are four electrodes drawn out at the four corners, and the inner ITO acts as a shielding layer to ensure a good working environment.


When the finger touches the metal layer, a coupling capacitor is formed between the user and the LCD touch screen surface due to the body's electric field. For high-frequency current, the capacitor is a direct conductor, so the finger draws a very small current from the contact point. This current is flowing out of the four electrodes on the touch screen, and the current flowing through these four electrodes is proportional to the distance from the finger to the four corners. The controller calculates the precise proportions of the four currents to determine the position of the touch point.


Characteristics of LCD touch screen


High resolution


Previous LCD touch screens had technical problems such as low resolution and limitation in touch methods. However, with the continuous development of display technology, the transmittance and resolution of LCD touch displays have significantly improved. Currently, a resolution of 1080*1920 or even higher can be achieved.


Sensitive touch, supports industrial glove touch


The LCD touch display screen supports two touch methods: capacitive and resistive. However, capacitive touch is currently more widely used due to its sensitivity, which supports highly intelligent recognition and can recognize various industrial gloves, medical gloves, and touch with wet hands, etc. It can also enhance explosion-proof function.


The intelligent application field has developed rapidly in recent years. LCD display screen manufacturers must increase their investment in technology research and development, develop innovative smart application LCD display screens, and promote the development of the LCD display screen industry. LCD touch screen is currently the display touch device adopted by many terminal products. When looking for TFT LCD screen manufacturers, it is best to look for companies that can provide a complete set of display screen + touch screen, as this can save a lot of trouble.


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