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DLP2010EVM-LC: Project white and black pattern

Shravani Erukala
Intellectual 385 points

Part Number: DLP2010EVM-LC

Hi,

I would like to project 1 bit pattern where 1 indicates white, 0 indicates black. How can I achieve this?

I have tried using GUI and scripts in advanced mode. I couldn't simultaneously illuminate red,green and blue. They are illuminated sequentially i.e if I choose RGB in illumination column, first R is been illuminated,then green is illuminated and then blue is illuminated. How can I illuminate all three LEDs at same time so that I can project a black and white pattern? and in python scripts, write RGB led enable is used for display mode only, I cannot use it for internal pattern streaming :( 

Please suggest accordingly

Thank You

  • 0
    TI__Mastermind 28005 points
    Shravani,

    I believe that this EVM uses sequential RGB sequences, so you would need to switch out the LEDs if you wanted to use white. I'll loop in one of my colleagues to confirm.

    Best Regards,
    Philippe Dollo
  • 0 in reply to Philippe Dollo
    Intellectual 385 points
    Any other alternative suggestion. Because if I use switching LEDs logic, I must use less exposure time. And for pattern to be visible I must run this in loop and my trigger out2 is high each time, again i must write some logic in setting trigger-out. Isn't there any simplest way to project white pattern and I get trigger once for each pattern?
  • 0 in reply to Shravani Erukala
    TI__Mastermind 20045 points
    Hello Shravani,

    Philippe is correct in saying you cannot illuminate all three LEDs at the same time. This is a limitation of the hardware. You can achieve "white" by sequentially illuminating the red, green, and blue LEDs during each pattern. This should trigger once per pattern (not once per LED). Therefore, I believe this should do what you are requesting.

    The main limitation is this is not as fast as just illuminating one LED at a time. You could either adapt your application to use non-white light, or you can work on finding a white LED for your application.

    Thanks,
    Kyle
  • 0 in reply to Kyle Rakos
    Intellectual 385 points

    Thanks for the response, Philippe and Kyle.

    I am curious to understand the hardware limitation,Kyle. Because I have read the optical engine document, it has 3 LEDs - R,G,B and also dichroic mirror arrangement (correct me if I am wrong, there is a possibility that I might have read some other higher specs optical engine). Just wondering what would the hardware limitation if we have the required setup. Is power requirement a limitation in this case?

    Thank You

  • 0 in reply to Shravani Erukala
    TI__Mastermind 20045 points
    Hello Shravani,

    It is a limitation of the PMIC/LED driver. It utilizes a shared inductor and feedback loop for the three LEDs. You can look at the datasheet of the DLPA2005 if you would like further information. I hope that helps!

    Thanks,
    Kyle