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A '''display''' is a device that modulates light according to the state of a connected control system, such as a digital state machine or an analog electronic circuit. Common digital state machines include computers.
+A '''display''' is a device that modulates light according to the state of a connected control system, such as a digital state machine or an analog electronic circuit.
It can also be called a '''dynamic visual display''' or '''electronic visual display'''.
It can also be called a '''dynamic visual display''' or '''electronic visual display'''.
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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.
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.
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+Common digital state machines include computers.
Display devices can be point based, ray based, or interference based. Point and ray based displays can be studied using [[ray optics]]. Interference based displays must be examined using [[wave optics]]. Point based devices are based on point sources. These include laptop screens, televisions, and smartphone screens.
Display devices can be point based, ray based, or interference based. Point and ray based displays can be studied using [[ray optics]]. Interference based displays must be examined using [[wave optics]]. Point based devices are based on point sources. These include laptop screens, televisions, and smartphone screens.