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Basic Concepts

Key Graphics Definitions

Refresh Rate - The rate at which the screen is "repainted". Generally 50-60 MHz is acceptable.

Frame Buffer - The place in memory where pixel data for the frame currently being displayed and subsequent frames are stored.

Color Depth - Expressed in bits per pixel (bpp). This is the number of possible colors that a pixel can represent.

BLIT - Stands for bit block transfer is a data operation commonly used in computer graphics in which several bitmaps are combined into one using a boolean function.

Sprites - Two dimensional bitmap that is integrated into a larger scene

Graphics Sub-system

The basic components required to build a Graphics Sub-system are :

  • Display panel

  • Frame Buffer

  • Display Controller

  • Microcontroller

  • Software

  • Touch (Optional)

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