The LCD screen is an electronic device whose working principle is to display images by converting light sources into imaging signals through liquid crystal technology. LCD displays are widely used in various electronic devices, such as computer monitors, mobile phones, flat-panel TVs, etc.
The LCD screen is composed of many liquid crystals arranged in an array, each of which is a pixel, which is used to control the position and shape of the image on the screen. In a monochrome LCD display, one liquid crystal is a pixel, while in a color LCD display, each pixel is composed of three liquid crystals: red, green, and blue.
The structural characteristic of liquid crystals is that the molecules have certain ordered properties. When liquid crystal molecules adjust their molecular orientation under the action of an electric field, the electro-optical effect can change the liquid crystal light from linearly polarized light to birefringent light, and can change the vibration direction of the light, thereby adjusting the transmitted or reflected light, thereby changing the image. .
During the working process of the LCD screen, light is illuminated on the LCD panel through the backlight. After the liquid crystal molecules on the LCD panel adjust the vibration direction of the light, it is converted into a color image through the color filter. Therefore, the structural system of an LCD display generally consists of a backlight, a liquid crystal layer and an OC control circuit.
Advantages of LCD display
LCD displays have the following advantages over other displays (such as CRT displays):
1. Thin, light and portable
Compared with traditional CRT displays, LCD screens are thinner, lighter and more portable, and are now standard features in smartphones.
2. High definition
LCD screens can provide high-resolution, high-color reproduction display effects. At the same time, LCD technology has become more and more mature, making the display quality of LCD screens more stable.
3. Low power consumption
LCD displays have lower power consumption than traditional CRT displays, which is also a feature that people now seek for all electronic devices.
4. Large viewing angle
Light-colored pixels can better maintain the brightness of the original color, and a good LCD panel design can also provide a wider viewing angle and prevent image distortion when viewed from the side.
5. Fast response
The response speed of the LCD display is faster than that of the traditional CRT display, which can greatly shorten the screen refresh time and improve the smoothness of the image.
6. Bright colors
LCD screens can display pictures with bright colors and high color saturation. And with the continuous development of liquid crystal display technology, the colors displayed by color LCD screens are getting closer and closer to CRT monitors.
Disadvantages of LCD screens
LCD displays have the following disadvantages compared to other displays (such as CRT displays):
1. Black purity is low
In a relatively dark environment, the black depth and purity of the LCD display are relatively poor, which will affect the image quality.
2. Low contrast
Since the light after the rotation and adjustment of the liquid crystal molecules cannot be completely reflected by the light source, the contrast of the LCD display is not very high compared to the CRT display.
3. Unable to provide the stability and clarity of CORBA screens
For some professional users, more professional display effects are required, such as the stability and clarity of CRT displays.
4. Liquid crystal anomaly effect
The liquid crystal anomaly effect refers to the uneven pressure between the liquid crystal electrode and the glass substrate, which will cause some distortion and deformation of the image.
The development of LCD screens
With the advancement of technology, the market share of LCD screens is gradually increasing. Currently, LCD screens have become the most popular displays widely used in various electronic devices, especially in smartphones, tablets, TVs, etc.
At present, LCD displays on the market are constantly innovating, and various types of products such as LED displays, 4K displays, 5K displays, curved displays, portable displays, and wide viewing angle displays have emerged. Among them, LED display is a more popular type of liquid crystal display, which has higher brightness, lower power consumption, and much faster response speed.
With the continuous advancement of technology, LCD screens will continue to usher in a broader market and higher demands. At the same time, they will continue to be updated and improved to continuously meet consumers' demands for high definition, low power consumption, and portability. needs.
