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DLP470TP: How much do individual pixels overlap considering persistence of vision?

Prodigy 20 points

Replies: 4

Views: 356

Part Number: DLP470TP

I understand DLP470TP is meant to be used with an optical glass slab actuator to achieve 60Hz 4K pixels from 240Hz 1920x1080 pixels time sequentially thanks to persistence of vision of the viewers.

However the info I cannot find which I believe is of great importance here is just how much are the projected pixels shifted from each other on the screen, with your typical F/2.5 projection system and how much they bleed into each other (their blend region)?

I would guess, based in diagrams across the internet, that the shift is equal to half of the diameter of the pixel diameter, but I can't verify this info.

What I would like from you would be some kind of an airy disk or spot diagram to illustrate how much two percieved pixels formed by two positions of the same physical pixel overlap and how big the blend region is and the intensity curve in that region.

Thank you.

  • Hi James,

    Welcome to TI E2E forums! An expert will look at and respond to your query soon!

    Thanks & Regards,

    Hirak.

    Thanks & Regards,
    Hirak.

     

    If a post answers your question, please click on "Verify Answer" button

  • In reply to Hirak Biswas:

    Hi Hirak,

    Still waiting.

  • In reply to James Tanner:

    Hi James, 

    Kindly wait for a few days, we are in the process of fetching this information. 

    Thanks for your patience.

    Regards,

    Hirak.

    Thanks & Regards,
    Hirak.

     

    If a post answers your question, please click on "Verify Answer" button

  • In reply to Hirak Biswas:

    Hello James,

    Thank you for your patience. Could you please share details about your application and system requirement.  It will very helpful in assisting you.

    In case of DLP470TP, an optical actuator shifts the image by a half pixel in every sub-frame. The shift order is +1/2 X, +1/2 Y, -1/2 X and -1/2 Y. There are 4K addressable pixels on screen. 

    The DLP470TP mirrors are in a Manhattan pixel grid. For a given pixel on screen, there is half pixel overlap with each neighboring pixel on right, left, up and bellow. There is a quarter pixel overlap with all four pixel along diagonal.

    Along with this image shift, the controller chip-set also performs proprietary image processing . Which is very critical part of this solution.

    regards,

    Vivek

    --------------------------------------------------------------------------------------------------------

    If a post answers your question, please click the "Verify Answer" button.

    Have questions about DLP Pico Chipsets? Check out the DLP Pico Universal FAQ for quick answers: https://e2e.ti.com/support/dlp/f/94/t/946506 

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