# BB driving a projector at 120Hz?

I have a DLP projector that runs off a DVI connector at 120Hz in order
to work with virtual reality goggles to create two 60Hz presentations
to each of your eyes. I'm curious if anyone knows if it is possible
to generate video at this rate if that's all that I need to do (and
maybe drive some relatively simple video scene). Has anyone tried to
max out the frame rate? Is it fixed at a certain max value?

I'm just picking the beagle board up and I was interested in the
feasibility of this project. I'm currently running the projector off
of a full dedicated PC with a graphics card. It would be nice if I
could reduce the size of the driver system to just a beagle board with
a USB connection. I'd like to create a multi-projector system and
having many PCs filling up a small space is not ideal.

Thoughts?

The maximum pixelclock is 96MHz (or 183 if someone manages to clock it of a different PLL), so you can do the math to see what the max resolution is at 120Hz.

regards,

Koen

Fabulous. That's just about 1100x720 pixels at 120 Hz

Thanks for the feedback. Good to have a back of the napkin
calculation to know that it's at least potentially capable of such a
feat.

Koen Kooi wrote:

I have a DLP projector that runs off a DVI connector at 120Hz in order
to work with virtual reality goggles to create two 60Hz presentations
to each of your eyes. I'm curious if anyone knows if it is possible
to generate video at this rate if that's all that I need to do (and
maybe drive some relatively simple video scene). Has anyone tried to
max out the frame rate? Is it fixed at a certain max value?

The maximum pixelclock is 96MHz (or 183 if someone manages to clock it of a different PLL), so you can do the math to see what the max resolution is at 120Hz.

yes, 183 is doable.

Op 24 dec 2008, om 17:06 heeft Vladimir Pantelic het volgende geschreven:

Koen Kooi wrote:

I have a DLP projector that runs off a DVI connector at 120Hz in order
to work with virtual reality goggles to create two 60Hz presentations
to each of your eyes. I'm curious if anyone knows if it is possible
to generate video at this rate if that's all that I need to do (and
maybe drive some relatively simple video scene). Has anyone tried to
max out the frame rate? Is it fixed at a certain max value?

The maximum pixelclock is 96MHz (or 183 if someone manages to clock it
of a different PLL), so you can do the math to see what the max
resolution is at 120Hz.

yes, 183 is doable.

Please tell us how Tomi and Måns would be very interested.

regards,

Koen