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New Patent for 3D Projector From Lightspeed Design

Lightspeed Design /DepthQ (Bellevue, USA) announces its receiptf of the U.S Patent No. 8,066,377 for inventing a color sequencing control method that allows 3D single-chip projectors to effectively produce high-performance displays with 3D active glasses and polarization modulators by resolving color artifacts and ghosting issues.

This new invention not only solved image quality problems, it accomplished that while utilizing the standard, off-the-shelf hardware configuration of single-chip 2D projectors. This allowed single-chip 2D projectors to operate either in 2D or in stereoscopic 3D, thereby creating a practical, cost-effective 3D product. The application of this invention paved the way for the now industry-wide standard of "3D Ready."

 DepthQ-hds3d-1 250pxligth

How does it work?

The novel control method designates a particular segment (or partial segments) of the existing color wheel as "non-critical" to the projection and uses this virtual opaque element to create dark time by discontinuing light output with control firmware. Creating strategically placed dark time with this new method allows the eye switching device to completely change its state from one eye to the other between projected image frames (in the dark) effectively mitigating the color artifact and crosstalk issues. In a sample DepthQ sequence, the designated non-critical color is the White segment of the color wheel. A custom designed control sequence is engaged which reorders the colors when necessary and discontinues the light output during some or all of the White segment's allotted display duration.

In 2005, Lightspeed's pioneering development efforts delivered the world's first portable 120Hz stereoscopic 3D, single-chip projector to the public. This first-to-market model was 800x600 resolution - while the second and current models, the DepthQ® WXGA and DepthQ® HDs3D-1, increased the resolution to 1280x720. DepthQ® projectors  synchronize up to 120 fps input for true 60 fps per eye, creating very high-quality 3D at modest prices, removing the economic barrier to broad use of 3D projection.

More info

To see the patent, go to Google Patents at

For more information go to

 Source : PRNewswire.