Text display

In any case, the display elements are controlled by electronics which activate them in the correct physical and temporal sequence to show the desired information.

They are used in a wide range of applications, including computer monitors, television, instrument panels, aircraft cockpit displays, signage, etc.

It is an electronically modulated optical device made up of any number of pixels filled with liquid crystals and arrayed in front of a light source (backlight) or reflector to produce images in color or monochrome.

A foam rubber mask with an array of holes surrounding the bulbs is attached to the display, causing it to resemble an egg crate.

They have also been used as variable-message signs on highways, although they were later superseded by flip-disc, fiber optic, and eventually LED displays.

If a segment is to be displayed as "off", it will be rotated so that its edge faces forward, with the painted surface pointing away and not visible.