An eggcrate display is a display technology that consists of a matrix of lightbulbs. Behind the matrix lies a foam backing with a series of indentations to accommodate the bulbs, which resembles the indentations in an eggcrate.
Most eggcrate displays use a complete 5×7 matrix for each digit, permitting the display of nearly all alphanumeric characters. Some variants exist that can only display numbers, but require fewer bulbs. Many game shows that once used eggcrate displays have since switched to more versatile plasma screen monitors.