The original dot-matrix displays introduced by Williams in 1991 were plasma panels — gas-discharge technology where each of the 128×32 pixels was a tiny cell of ionized neon gas that glowed orange when energized. The plasma DMD became the defining visual element of pinball’s golden age, its warm monochrome glow framing the animations and character art that brought licensed themes to life in machines like The Addams Family, Twilight Zone, and Medieval Madness.

Plasma panels had characteristics that shaped the art created for them: high contrast, wide viewing angles, and a natural warmth to the orange phosphor that read well under arcade lighting. Animators developed a distinctive aesthetic around the 128×32 resolution — chunky, high-contrast characters and bold typography designed to be legible from across a room. The low pixel count was a creative constraint that produced a recognizable visual language.

Williams, Bally, and later Stern shipped plasma DMDs through the 2000s and into the early 2010s. The panels eventually became difficult to source as the gas-discharge technology fell out of mainstream manufacturing, which contributed to the development of LED-based replacements. Working plasma panels remain prized by purists who consider their analog warmth and slight pixel bloom essential to the visual character of the machines they were designed for.