Watch: how Digital Light Processing works

Mark Frauenfelder 9:10 am Mon Mar 9, 2015

Ben Krasnow is the modern Way Things Work. In this video, he shows how Digital Light Processing projectors work.

He even built a macro-size chip so you can see the mirrors in action.

Digital Light Processing projectors use a chip that is covered with tiny mirrors that tilt back and forth. When the mirror is tilted one way, it reflects light out through the front of the projector, creating a bright pixel. When the mirror is tilted the other way, the pixel is dark. In this video, I explain how DLP works and show a macro-scale model.

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