Digital light processing
Digital light processing (DLP) projector is a kind of video projector. It uses small mirrors that reflect light. The mirrors can be moved to either reflect light or not reflect light. The mirrors move very fast. When the mirror reflects light more often, it makes a lighter color. When the mirror reflects light less often, it makes a darker color.[1] DLP projectors can be bright and have a high resolution. This can make the picture look better. DLP projectors can be small so they can be moved more easily. Some DLP projectors are small enough to fit in a smartphone.[2] Big DLP projectors are often used in movie theaters.
Digital Micromirror Devices
DLP projectors use a digital micromirror device (DMD) to make the picture. A DMD is made of many very small mirrors. The mirrors are in a grid on a semiconductor. Each mirror makes a small part of the picture, called a pixel. The resolution increases when the DMD has more mirrors.[3]
The mirrors can be moved so they reflect light through the lens or reflect light somewhere else. When mirror reflects light through the lens, the pixel is light. When the mirror reflects light somewhere else, the pixel is dark. The mirrors move much faster than a person can see. When the mirror spends more time reflecting light through the lens, the pixel is lighter. When the mirror spends more time reflecting light somewhere else, the pixel is darker.[1]
Digital Light Processing Media
Texas Instruments Digital Light Processing Logo
The Christie Mirage 5000, a 2001 DLP projector
Diagram of a digital micromirror showing the mirror mounted on the suspended yoke with the torsion spring running bottom left to top right (light grey), with the electrostatic pads of the memory cells below (top left and bottom right)
InFocus LP425z Single Chip DLP - internal components
InFocus LP425z Single Chip DLP - 4-segment color wheel - Green Blue
InFocus LP425z Single Chip DLP - 4-segment color wheel - Red Gray
InFocus LP425z Single Chip DLP - top shroud with lightsink diffuser plate
InFocus LP425z Single Chip DLP - DMD Light Path
The rainbow effect found in 1DLP projectors only utilizing a mechanical spinning wheel.
The InFocus IN34, a DLP projector
References
- ↑ 1.0 1.1 "DLP Video Projectors - Digital Light Processing Projectors". Portable Video Projectors. Archived from the original on 2019-06-05. Retrieved 2019-06-05.
- ↑ "Samsung unveils new Galaxy Beam smartphone / projector combo with dual core CPU". Engadget. Retrieved 2019-06-05.
- ↑ "DLP products – Getting started". Texas Instruments. Retrieved June 6, 2019.