LCD控制器与驱动器

LCD控制器的作用是将显示缓存（在系统存储器中）的LCD数据传输到外部LCD驱动器，并产生必须的LCD控制信号

（转自ST）Dot-matrix LCD units, which are usually controlled with a Silicon embedded glass LCD
driver, can be interfaced with microcontrollers using a serial interface. This type of LCD unit
has an embedded RAM for display and do not require any special microcontroller feature.
Unlike dot-matrix LCD units, color LCDs need a specific controller.
The use of color LCD controllers means that each pixel needs four lines: three anolog
voltage lines for red, green and blue (horizontal) and one voltage line for selection (vertical).
Typically, color LCDs can be interfaced in two ways:
● RGB interface with synchronization signals
● MPU (microprocessor unit) interface (parallel or serial)
All graphic LCDs come with built-in drivers in the form of a chip or silicon on glass. These
drivers do the conversion between RGB signals and synchronization and pixel control.
Many LCDs also come with an LCD controller that does the conversion between the MPU
interface and the RGB signals. Some chips are both drivers and controllers. The role of the
controller is to constantly refresh the LCD.