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DLPDLCR471TPEVM: Possible to disable 4k mirror-shifting behavior?

Zachary Tong
Prodigy 10 points
Part Number: DLPDLCR471TPEVM
Other Parts Discussed in Thread: DLPC6540

Tool/software:

I am using a DLPDLCR471TPEVM for a maskless lithography machine prototype. I suspect that the 4k mirror-shifting feature is reducing contrast of my patterns because each mirror-shift causes stray light to "sweep" across the resist before it settles in a new location. Multiplied by the framerate and overall exposure time.

Is it possible to disable this behavior and use the native 1920x1080 micromirrors without shifting? Basically just use the mirrors in a traditional on/off pattern?

I tried setting the DMD to "manual" resolution and forcing 1920x1080, but I'm not sure if that actually disables the shifting, or just displays "black" for the other three quadrants.

Thanks for the help!

  • 0
    TI__Expert 8010 points

    Hello Zachary,

    Welcome to the E2E forums and thank you for your interest in DLP Tecnology. We hope to assist you with your questions. 

    Please give our team some time to look into this issue but I believe to disable the 4K XPR feature you can use the following command to disable the XPR actuator which is needed to run 4K. You can find this from the programmers guide for the DLPC6540 controller. 

    https://www.ti.com/lit/pdf/dlpu110

    Alternatively in the advanced GUI there is options to send scripts.

    If you go to the help tab up top, you will find scripting reference and then one useful command is the write xpr mode:

    This takes in a mode parameter which is defined as one of the following. You can set it to 0 to turn XPR off which will disable 4K resolution or XPR functionality which does the mirror shifting.  

    Regards,

    Alex Chan

  • 0 in reply to Alexander Chan
    Prodigy 10 points

    I will try this out, thank you! Sounds exactly what I need, didn't realize the shifting feature was called XPR. Thanks!