The role of LCD driver chip

Liquid crystal displays and corresponding driver chips are usually integrated in electronic devices. The image display on the liquid crystal panel is realized by the analog voltage provided by the driving chip. The LCD driver chip directly drives the display panel through the analog voltage output, so its performance will directly determine the display effect of the LCD device. In addition, it has a large number of high-voltage analog output pins, high-speed and low-amplitude digital signal input and other characteristics. Technology hotspots.

The display mode changes from simple segment type and dot character type to complex dot matrix type and tone type. The display color changes gradually from black and white to color. As the display screen grows from small to large, the response time is gradually shortened. At present, STN displays have advantages in terms of cost and current consumption.

At present, LCD display devices of ST and TFT are commonly used. Since TO is the trend and mainstream of development, we will mainly focus on the LCD driver chip of TO to talk about this type of IC to drive the LCD display of TO. Two kinds of driver chips, GateDriver and Source Driver, are required. The driving voltage of the pigment point, and the Gate Driver controls the strobe state of each row of pixels. In addition, from the application point of view, the applications of LCD display devices for industrial products or portable products are mainly divided into the application fields of large screens (greater than 9 inches) and small screens (less than 9 inches). Under normal circumstances, the small screen application usually chooses the source driver and the gate driver combined with the controller driver to drive, and the large screen device usually uses the separate driving method of the two.