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German researchers create sugar-cube sized video projector

Posted: 26 Sep 2006     Print Version  Bookmark and Share

Keywords:image sensors  video projector  sensor  cell phone  Fraunhofer Institute for Applied Optics and Precision Engineering 

Researchers at the Fraunhofer Institute for Applied Optics and Precision Engineering in Jena, Germany have produced a video projector the size of a sugar cube, according to a BBC report.

The projector uses a single rapidly moving mirror to deflect a laser beam and produce and image, the report said. Alternative mirror-based projectors, developed by Texas Instruments Inc., use thousands of micrometer-sized mirrors on a single chip to compose an image.

Having achieved a size of 16-by-9-by-9mm, Fraunhofer's projector could be used to project images from mobile phones, PDAs or laptops, allowing small portable devices to also offer large high-resolution displays, the report said.

The prototype only works with red and blue lasers and so does not offer have a full colour gamut and green diode lasers are not yet small enough for inclusion in the device.

The Fraunhofer projector is smaller than a monochrome projector shown by start-up company Light Blue Optics Ltd.

Light Blue Optics raised Rs.11.62 crore ($2.5 million) in seed funding from a consortium led by U.K. venture capital group 3i plc on the strength of its matchbox-sized monochrome projector in July 2006. The company is also reported to have demonstrated a colour version of its display which uses a electronically-controlled liquid crystal spatial light modulator to modulate red, green and blue beams, but the demo operates on an optical bench.

- Peter Clarke
EE Times Europe

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