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A '''display''' is a gadget that conveys images or information by sending out [[visible light]]. It can be a [[near-eye display]] fixed to the head, or a display that is out in the world. Displays work by being connected to a control system like a computer. The computer generates informational signals that the display reacts to and creates light. Displays are necessary for most modern computing.

A '''display''' is an optical machine that conveys images or information by sending out [[visible light]]. It can be a [[near-eye display]] fixed to the head, or a display that is out in the world. Displays work by being connected to a control system like a computer. The computer generates informational signals that the display reacts to and creates light. Displays are necessary for most modern computing.

There are two major types of display: World fixed display and head-fixed display. A world fixed display exists in the world, like a laptop, a TV, or a smartphone. A head fixed display is mounted to the head, meaning when you turn your head it stays in front of your eyes. Head fixed displays include [[VR headset]]s and the [[Google Glass]] and gadgets from [[Vuzix]].

There are two major types of display: World fixed display and head-fixed display. A world fixed display exists in the world, like a laptop, a TV, or a smartphone. A head fixed display is mounted to the head, meaning when you turn your head it stays in front of your eyes. Head fixed displays include [[VR headset]]s and the [[Google Glass]] and gadgets from [[Vuzix]].