VGA Explained: From 640×480 to Modern Displays

VGA stands for Video Graphics Array. It is an analog video transmission standard introduced by IBM in 1987 with the PS/2 computer.

VGA uses a 15-pin D-Sub connector, which transmits analog signals of red, green, and blue, as well as synchronization signals. The standard originally supported a resolution of 640×480 with 16 colors or 256 grayscales, and could display 256 colors at a resolution of 320×240. Later, it was extended to support higher resolutions such as 800×600, 1024×768, and theoretically up to 1920×1200, but the image quality may decline significantly at high resolutions.

With the popularization of digital interfaces, VGA has been gradually phased out, but it can still be found in some old devices, low-end devices, or specific application scenarios.