Display Processor is the interpreter or piece of hardware that converts display processor code into pictures. The Display Processor converts the digital information from the CPU to analog values. The main purpose of the Display Processor is to free the CPU from most of the graphic chores. The Display Processor digitizes picture definitions given in a program or application into a set of pixel intensity values for storage in the frame buffer. The digitization process is called Scan Conversion.
There are four parts of the display processor as given below
Display Controller also called the Video controller used to control the operations of the display device. The functions of the display controller are:
Display File Memory is used to create an image on the screen and visual object recognition.
Display Generator: The Two main functions of a display generator are.
Display Console: It is a combination of a display device and input devices. Such as CRT, keyboard, Light pen, and Deflection system.
The video controller in the output circuit develops horizontal and vertical drive signals so the monitor can be scanned.
There is a large number of Display Devices available to free the CPU from graphic chores: