A dynamic visual display is a device that modulates light according to the state of a control system, such as a digital state machine or an analog electronic circuit. Common digital state machines include computers.
Dynamic visual displays are typically electronic. They are typically driven by an electronic signal and output modulation of light.
Dynamic visual displays include computer screens, television screens, alarm clock displays, dynamic LED billboards, game boy displays, stereoscopic head-mounted displays, and heads-up displays in cars.
A display must be able to display something that is outside of its own mechanism in order for it to be useful. Otherwise it is more like just a visual phenomenon.
Display devices can be point based, ray based, or interference based. Point based devices are based on point sources. These include laptop screens, televisions, and smartphone screens.
Ray based devices are based on rays. These include heads up displays in cars.
Interference based devices are also called holographic devices. The display device modulates light that interferes with itself and forms a pattern at some distance. This is the rarest type of device.
Stereoscopic
Stereoscopic visual displays include VR headsets.