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Original question:

DLP7000: 0.7" XGA 2xLVDS NIR technical documentation

DLP7000: Confirm if maximum rate same as Pattern rate, binary (Max) (Hz)

Jonathan Geronga
Expert 7930 points
Part Number: DLP7000
Other Parts Discussed in Thread: DLPC910, DLPC410

Hi Team,

Our customer is looking for a DMD that is able to refresh each mirror line about 30kHz and needs to be programmable and synchronize in some way with a camera. Their application is for Spectral Domain Optical Coherence Tomography and will use visible light 400-700nm.

Upon checking, DLP7000 looks nearest to the customer's request but the customer has some questions below that we need to ask for your help:
1.  If they swtich the DMD on-state line by line, is the maximum rate same as Pattern rate, binary (Max) (Hz)? 

Please let me know if you want more clarification with the customer.

Thanks!

Jonathan

  • 0
    TI__Guru 54705 points

    Johnathan,

    It is possible to go a little faster than the global binary rate, but is primarily governed by the Reset micromirror settling time.

    If the lines MUST be adjacent each time, then it will not be much faster than the global pattern rate.

    If it is possible to turn one row on in one block then clear it and turn on a row in another block and so forth back and forth, then a decent improvement could be achieved, but I don't think it will get you quite to 30 kHz.

    Let me know if this sounds like a possibility.

    Fizix

  • 0 in reply to Fizix
    Prodigy 10 points

    Thank you for the response. I saw the DLP7000 can reache binary pattern rate over 30 kHz which will fit our application. However, this project is aiming on low-cost so I would like to know the cheapest option if we only need to refresh adjacent lines of DMD around 30 kHz. If you could provide some options, that will be helpful.

  • 0 in reply to Yunqin Zhao
    TI__Guru 54705 points

    Johnathan,

    I believe that the controllers that can be addressed this way and reach the kind of speeds you are wanting are going to be FPGA based controller, like the DLPC410 and DLPC910.

    Our other controllers cannot get close to that.

    What is the bare minimum binary pattern rate that could work?

    Fizix