LCD is one of the common displays in electronic products. It has the advantages of small size, good display effect, and low power consumption. It is widely used in electronic products such as mobile phones, computers, and televisions in modern life. However, in the process of using LCD screens, many people do not fully understand them. The following is the basic knowledge of LCD screens.

 

1. Liquid crystal principle

The Chinese name of liquid crystal is liquid crystalline substance, which is a state of matter between liquid and solid. The spatial arrangement of liquid crystal molecules is regular and has certain polarization. By controlling the electric field in different areas, the arrangement of liquid crystal molecules can be changed, thereby changing the light transmittance of liquid crystal molecules. This process is called the electro-optical effect.

In an LCD display, two glass plates are used to sandwich the liquid crystal layer in the middle, and an electric field is applied to the two glass plates. By controlling the size and direction of the electric field, the arrangement of the liquid crystal molecules can be controlled to achieve the brightness and brightness of the liquid crystal. Color control.

 

2. Composition of LCD display

The LCD display is divided into two parts: the display module and the driver circuit board. The display module is composed of LCD panel, lamp tube, filter, TFT array, etc. The driver circuit board is the circuit that controls the operation of the LCD panel, sometimes also called the controller board. Its main function is to convert image information into signals that can be understood by the LCD panel, and control these signals through the driver IC to control the arrangement state of the liquid crystal molecules, thereby displaying the correct image.

 

3. Advantages of LCD monitors

1. Low power consumption: LCD monitors do not require high voltage and high current to drive the screen, so they consume less power, generate no heat, and do not harm health.

2. Good display effect: The image displayed by the LCD monitor is composed of millions of pixels, and each pixel can be controlled individually, so the colors are more realistic and vivid, and the details are better.

3. Large display area: LCD monitors are smaller than traditional CRT monitors, so they can produce larger-screen monitors and adopt a flat design. With the continuous advancement of technology, the thickness of LCD panels has also become thinner. Come thinner.

4. Anti-radiation: Because cathode rays are not used to produce images, compared with CRT monitors, they do not produce electromagnetic radiation to harm health.

5. Wide viewing angle: The vertical viewing angle range of the LCD monitor is very close to that of the CRT monitor, but the horizontal viewing angle range is larger, so it can be viewed by multiple people at the same time.

6. Flexible use: LCD monitors are small and lightweight, so they have a wide range of applications. They can be used in homes, offices, teaching, transportation and other fields.

 

4. Disadvantages of LCD monitors

1. Viewing angle problem: Different LCD panels have different viewing angles. Even for the same type of panel, the viewing angles will be different. This requires the user's viewing angle to be perpendicular to the screen to achieve the best viewing effect.

2. Contrast: Normally, LCD monitors have lower contrast than CRT monitors, and are prone to backlight leakage and yellowing of the screen background.

3. Output signal problem: The input port of the LCD monitor is usually a digital signal input and cannot be directly input with analog signals. It needs to be digitally processed to output. If the input signal does not match the monitor, the display effect of the screen will be affected or even unable to display normally.

4. Affects color: The brightness and contrast of the LCD display will be affected by the surrounding light, which reduces the degree of color restoration. Adjusting the backlight and brightness of the screen will also affect the color restoration effect.

 

5. Use and maintenance of LCD monitor

 

1. How to adjust the screen brightness?

Screen brightness can be adjusted in the settings of the computer operating system. Directly adjusting the brightness of the monitor may affect screen life and other issues.

 

2. How to adjust the blurry display?

It may be because the resolution is not enough and you need to adjust the resolution. You can adjust it one by one in the control panel. Normally, the resolution needs to be adjusted according to the display information to show the best visual effect.

 

3. How to adjust the clarity?

The operation method of adjusting the clarity of the LCD screen is to adjust it in the computer system that supports you, not on the monitor itself.

 

4. How to remove screen dust?

Use a clean, soft cloth and moisten it to clean the screen, but be careful not to scratch or pull hard.

In short, although the LCD screen has its shortcomings, its advantages are obvious, especially its small size, good display effect, and low power consumption, which make it widely used in many fields. For those who use LCD displays, they need to better understand the basic knowledge of LCD displays so that they can better prevent problems and maintain them during use.