Improving black levels?

Discussion in 'Displays' started by Jack Spencer, Dec 3, 2004.

  1. Jack Spencer

    Jack Spencer Agent

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    I have a Sanyo PLV-70 projecting onto a DIY blackout cloth screen. Is there an easy way to improve the black levels? The picture is great and black levels aren't bad, but they aren't great either. I've calibrated with Video Essentials.
     
  2. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Greetings

    What about Neutral Density filters?

    Improve black at the cost of light output.

    Regards
     
  3. Neil Joseph

    Neil Joseph Lead Actor

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    What colour have you painted the screen? You could get improvements with a gray or silver/gray for that matter.
     
  4. Jack Spencer

    Jack Spencer Agent

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    Thank you for the replies. I don't know what Neutral Density filters are but I'll Google them. Thank you.

    I haven't painted the screen at all. Just plain blackout cloth so far. I might try a few colors on some of the leftover cloth and see if I like it.
     
  5. ChrisWiggles

    ChrisWiggles Producer

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    Your projector is a digital projector, and if if you've calibrated it to maximize the possible on/off CR that the projector is capable of, then you're taking full advantage of the projector.

    However, if you feel blacks are too bright, using a ND filter will not improve your CR, but lower the brightness overall, lowering the level of black AND white equally. Using a lower-gain screen material like a gray screen can also help in this regard. Note that you will never get completely black, but you can lower the point where the chunk of on/off CR of your projector is, essentially.

    Of course, using a projector with a higher on/off contrast ratio would allow you to maintain the current level for white, while lowering the black.
     

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