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Increasing refresh rate at the expense of spatial resolution

Other Parts Discussed in Thread: DLP7000, DLP5500, DLP4500

I saw on your website that you have fast solutions, like DLP7000, which can reach a rate up to 32kHz, which refers to the overall refresh rate of the DLP.

In my application, a high spatial resolution along both x and y axis is not mandatory, but it is enough to have a high number of pixels only along one direction.

I saw from the datasheet of DLP7000 that many DMD operations are possible: single block, dual block, ...

I was wondering if it is possibile tu use only a bank of the dmd (letting all the others off) to increase the frame rate at the expense of a lower effective number of rows. Is it possibile in this case to reach 32*16kHz rate with a single bank active?

If not, is there any other possibility to increase the frame rate at the expense of spatial resolution?

Finally, is it possible to increase speed using only a portion of the DMD also with others chips of the DLP family, like DLP5500 or DLP4500?

Thank you for your time

Best regards,

Alessandro Cominelli

  • Hi,

    Welcome to DLP section of TI E2E community. It is possible to refresh single block with DLP7000.

    -ykc

  • Hello Alessandro,

    As indicated in the previous post ( https://e2e.ti.com/support/dlp/f/94/t/809046 ) 70 kHz is about the fastest you can achieve with our current offerings.

    The DLP7000 referenced in that post is our fastest refresh rate DMD that we currently offer on ti.com. 

    As I read your question, you are looking for 32*16 kHz (i.e. 512 kHz refresh rate), which is not possible with our current offerings.

    Unfortunately the DLP5500 and DLP4500 DMDs are global operation only.  In other words the entire array must be loaded each time and they have a smaller data bus also.

    Fizix