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DLP1700 as a grid

Tyler Hooker
Prodigy 100 points

Good morning,

I am looking into running the DLP1700 as a grid.  I won't be supplying a video input source.  I want to turn on/off the micromirrors directly.  Is this possible to do?  The documentation seems to indicate that the DLP1700 needs to be controlled by the DLPC100 which receives a video input source.

I apologize if my question isn't clear.  I am a software engineer, and I don't know much abou the world of hardware.  If I need to clarify anything feel free to ask.

 

-TH

  • 0
    TI__Genius 9935 points

    Tyler,

    Thank you for your question, and welcome to the DLP & MEMS E2E forum.

    The DLP1700 is supported only as a component of the entire chipset. There is no support for direct control of the DLP1700 without the DLPC100 controller. As you have probably already discovered, there is documentation to help with the use of the DLP1700/DLPC100/DLPR100/DLPR100 chipset.

    Please see especially the DLP Pico Chipset 2.0 Programmer's Guide:

    http://www.ti.com/litv/pdf/dlpu002a

    You may also want to refer to the App Report - Using the DLP Pico 2.0 Kit for Structured Light Applications:

    http://www.ti.com/litv/pdf/dlpa021a

    The way to display a user-defined grid on the DLP1700 is to create a video stream of the grid and send it to the DLPC100 as a 640x480@60Hz video stream.

    Best regards,

    Pascal

     

     

  • 0 in reply to Pascal DLP
    Prodigy 100 points

    Thank you for the response.

    I am ok if I have to use the entire chipset, but having to create a video stream is a problem for my application.  Let me make sure that I am very clear on this.  If I wanted the entire micromirror display in the off state except for one single micromirror (this is just a though experiment here) that would be impossible without having a corresponding video stream?  There is no way to directly just turn on one micro mirror?

     

    -TH

  • 0 in reply to Tyler Hooker
    TI__Genius 9935 points

    Tyler,

    There is no way, other than as a pixel in a specific video frame, to control an individual mirror. That is, there is no static control of the pixels as part of a grid array.

    However, be aware that the actual pixel dimensions of the DLP1700 is 480x320 - not 640x480 (the video dimensions). The DLP1700 chip is half-VGA (HVGA). As a consequence there will be some pixel translations going on between the 640x480 (VGA) frame and the 480x320 (HVGA) DMD.

    If you want to do direct pixel-to-pixel patterns, then look at look at the external pattern mode in the Using the DLP Pico 2.0 Kit for Structured Light Applications, document dlpa021a.pdf which is available at http://www.ti.com/litv/pdf/dlpa021a. This mode requires you to construct a 1-to-1 480x320 grid in the upper left-hand-corner of a 640x480 video frame and send it over the video input. Refer to the App Report for details.

    Best regards,

    Pascal

  • 0 in reply to Pascal DLP
    Prodigy 100 points

    Is the Pico V2 kit the one listed on TI's website?  I don't see a "V2" in the name of the Pico kit.

  • 0 in reply to Tyler Hooker
    TI__Genius 9935 points

    Hello Tyler,

    Yes. The only TI DLP Pico development kit is the Pico Kit v2. TI does not make or sell this kit. TI does promote the Pico Kit v2 as a demo of the DLP1700 chip set, and as a development platform for those interested in DLP Pico technology.

    Please see http://digikey.com/pico to learn more about the Pico Kit v2, and to purchase it.

    Best regards,

    Pascal