Liquid Crystal Display Overview
In recent years, due to key technologies, the LCD screen continues to make breakthroughs and prices continue to decline. LCD monitors are now completely replacing CRT monitors in PC application dominance. It has become a major brand as well as the preferred standard compatible product. The rapid popularity of LCD display products increases the demand for technical service for those of us who are in the business of maintenance. Hence, it means that a new learning task has been placed in front of us; engineers and technicians. Without any further delay, let us get into the technical details of this product.
First, we look at a liquid crystal display; Image internal circuit part of the structure: From the graph, we can tell that the internal circuit structure of LCD monitors has the following main components:
1. Drive plate (also called the motherboard): mainly used for receiving, processing, and sending from the external analog (VGA) or digital (DVI). The video sends the signal to go through the line control LCD screen (PANEL). The driver board with MCU (Master Control Unit) is a liquid crystal display detection control center and serves as the brain of the system.
2. The power supply board: for 90 ~ 240VAC voltage into 12V, 5V, 3VDC power supply monitor workers, etc.
3. Backlit panels (also called pressure plate): form other board or power supply board12V DC output voltage to convert the PANEL to a high frequency of 1500 ~ 1800V high voltage alternating current, in a case of lighting backlight PANEL. Power supply board and backlight sometimes do with the so-called power backlight combo plate.
4. LCD screen: a liquid crystal display module, which is the core component of a liquid crystal display, comprising of a liquid crystal panel and a driver circuit. Among them, inside the LCD screen is a liquid crystal display which is the most critical component; its performance and price of LCD monitors have crucial roles.