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Display devices can be point based, ray based, or interference based.
+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==
Stereoscopic visual displays include VR headsets.
Stereoscopic visual displays include VR headsets.