DLPLCR6500EVM: Problem with video mode and the small residual intensity that remains when you off the pixels

Hello Omar,

I would use Video Pattern Mode instead of Video Mode.  This mode can be configured very much like the Pattern On-The-Fly Mode except the patterns are whatever is coming in on the video port.

Assuming you have a 60 FPS input you could set it like this:

This assumes that you only want the pixels "on" or "off" during a frame (i.e. 0 or 255) and that you have set R=G=B = 0 or 255.  The configuration shown treats the image as a single 1-bit pattern using only the G MSB.  There will only be one DMD load per video frame.  I have set the exposure time to 16,660 µs, which gives about 6.67 µs cushion for any video input jitter.  You could push this closer to the frame time, but the max you can enter without causing Sequencer Abort Errors is 16,666 µs. 

Depending on the exact frequency of your graphics card output you could cause Sequencer Abort Errors at an exposure time value lower than 16,666 µs.  Experiment and see.  When you find the break point I would remove at least a couple of µs for possible input sync jitter.

To make it easy, create a text file (*.txt - name it whatever you want) and insert the two lines shown below (without the tab indents).  

Video Mode
7,1,16660,0,7,1,0

Then go to the Video Pattern Mode page and use the "Load" button and navigate to the file you just made and load it.  Then press the "Update LUT" button and then the "Play" button.  This should give you a much better result.  NOTE:  You must have first gone to the Video Mode tab and gotten the regular video running before switching to the Video Pattern Mode tab.

I hope this is helpful.

Fizix

Hello Fizix,

Thanks for your help, it works great, as you described using video pattern mode.

Thanks

Omar