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Sony VPL-10HT & Hoya FL filters?

Discussion in 'Projectors, Screens & Video Processors' started by fraggle, Dec 14, 2002.

  1. fraggle

    fraggle
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    Hi all,

    I've read about the benefits of fitting the FL-Day filter to Panny projectors, but has anyone done this to a Sony VPL-10HT projector?

    Also read about using the CC30R (?) as well, what benefits does that give?

    What size filter does the 10HT need?


    Cheers,
    Richard
     
  2. LV426

    LV426
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    The CC?R filter is pink in colour.

    The reason it is of benefit is that:

    Because of the natural colour balance of the lamp and/or optics, the individual gains of the green and blue LCD panels in the PJ have to be set lower than the red one to achieve correct balance.
    This is done at the factory.

    If you add a pink filter to the PJ lens, this has the effect of reducing the amount of blue and green light reaching the screen.

    This has two effects. It reduces the total light output , and gives the picture a pink tint.

    Because there is always some 'slack' in the blue and green gains, you then enter the service menu on the PJ and increase these gains to restore correct colour balance.

    Gain has an effect only in the bright part of the image; not in the dark.

    So, the end result is correct colour balance, light output reduced in dark areas, light output remains the same in light areas, ie more contrast, better blacks.
     
  3. Mr.D

    Mr.D
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    Thats not entirely true for a digital panel device. CRT does normally have two control points ( bias and gain) at the low end and top end of the intensity curve but its not really required for digital panels : one point manages the whole curve. although this does mean you are controlling a linear response rather than a designed curve but there are was around this ( gamma/LUT correction in software somewhere in the image pipeline).

    But yep thats the plan on the FLD filter and I would say it does improve the projector overall.
     
  4. LV426

    LV426
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    I believe you.

    The question was asked, in the context of a Sony VW10. Whether it is done cleverly in the firmware to make this device adjust 'like' you say a CRT does, or for some other reason, I don't know.

    But: On a Sony VW10, there are individual bias and gain settings for each of the three colours. And Gain has no (or at least very little - unnoticeable) effect on the brightness of black.
     

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