What is LCD touch display?

With the increasing application of touch screens, LCD (liquid crystal display) technology has also brought convenience to users' lives. From smartphones and tablets to industrial control screens and medical devices, LCD displays stand out among numerous applications due to their advantages of high definition, low power consumption, and stable performance. So, what is the working principle of an LCD display screen and what are its advantages?
 

The basic principle of LCD display screen
The core of an LCD display screen is the liquid crystal material, which is composed of two polarizing plates sandwiching the liquid crystal layer, and the backlight (usually LED) provides light. When current passes through liquid crystal molecules, their arrangement changes, thereby adjusting the amount of light passing through, ultimately forming different images and colors on the screen.
 

Compared to traditional CRT (cathode ray tube) displays, LCDs are thinner, more energy-efficient, and do not experience flickering issues. Long term use is more eye friendly.
 

The main applications of LCD display screen
1. Consumer electronics: Mobile phones, tablets, laptops, smartwatches, etc., almost all portable devices rely on LCD technology.
 

2. Industrial control: In automation equipment, CNC machine tools and other scenarios, LCD screens have become the preferred choice due to their stability and anti-interference ability.
 

3. Medical equipment: Medical displays require extremely high color accuracy and viewing angle, while LCD display screen can provide clear and distortion free images.
 

4. In car display: The central control screen, dashboard, etc. of the car need to adapt to complex environments, and the high brightness and wide temperature performance of LCD make it an ideal choice.