Is the lcd monitor really just a screen? Not really! From the display panel to the screen system, from the color filter to the drive circuit, all parts of the LCD monitor are working well to present the display screen to you.
Whether it is used for playing games, watching movies, or daily office work, the quality of the lcd monitor directly affects your visual experience. So, how does the LCD monitor convert electrical signals into images? Today we will start from the inside of the monitor and take you to uncover the story behind this “vision”!
Display introduction and composition
(1) Introduction to monitors
The monitor is an important component of the computer system. It is used to output images and video content and is the main interface for users to interact with computers. The type, resolution, refresh rate, response time and other performance indicators of the monitor will affect the user’s visual experience and work efficiency.
2) Composition of LCD
① Display panel
Liquid crystal layer: Located in the center of the display panel, it contains liquid crystal molecules. Liquid crystal molecules change their arrangement under voltage, thereby controlling the amount of light passing through and forming an image. Polarizer: There is a polarizer on each side of the liquid crystal layer, which is used to filter light and allow it to pass through the liquid crystal layer. Changes in the arrangement of liquid crystal molecules will affect the polarization direction of light, thereby adjusting the intensity and color of light.
② Backlight system
Backlight: Usually, LED (light-emitting diode) is used as the backlight to transmit light through the liquid crystal layer. The backlight is located on the back of the display panel. Diffuser: Located between the backlight and the liquid crystal layer, it evenly distributes the backlight to ensure uniform light across the entire screen. Light Guide Plate: The light guide plate evenly guides the light emitted by the backlight to the entire display panel.
③ Color filter
RGB Filters: There is a color filter layer on the LCD panel, which decomposes light into three basic colors: red, green and blue. Each pixel is composed of three sub-pixels: red, green and blue, and different colors are mixed by adjusting the brightness of these sub-pixels.
④ Drive circuit
TCON: Controls the display timing of the LCD to ensure the correctness of the displayed content. TCON processes the image signal from the computer and converts it into a format that the LCD panel can display. LCD driver chip: Drives the voltage change of the liquid crystal pixels to control the arrangement of the liquid crystal molecules to achieve image display.
⑤ Control circuit
Power management circuit: Provides a stable power supply to ensure the normal operation of the LCD monitor. Signal processing circuit: Processes video signals from a computer or other input source and converts them into signals that the LCD monitor can process.
⑥ Case
Monitor case: A structure that contains all internal components, usually made of plastic or metal materials, providing protection and support. Front panel: Usually made of glass or plastic, protecting the LCD panel and providing visual effects.
⑦ Interfaces and control buttons
Input interface: Such as HDMI, DisplayPort, VGA, DVI, etc., used to connect external devices such as computers and game consoles. Control buttons or touch screen: Used to adjust the display’s brightness, contrast, color settings and other parameters. Modern monitors are sometimes equipped with touch screens or touch buttons for settings.
⑧ Cooling System
Heat sink and fan: LCD monitors may be equipped with heat sinks or fans to help dissipate heat and keep the internal temperature stable.
To summarize: LCD monitors convert electrical signals into visible images through the collaborative work of the above components. Each part plays an important role in the performance and quality of the monitor, ensuring the clarity, color accuracy and overall visual effect of the displayed image. Understanding these components will help you better choose and maintain the monitor.
