Projector for daytime/evening viewing

Discussion in 'Projectors, Screens & Video Processors' started by Dilshad, Jun 21, 2004.

  1. Dilshad

    Dilshad
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    A bit of advice please. What sort of projector would still give suitable viewing during the day or evening without having to 'blacken' the room. We can pull down the curtains but it will still have a bit of light.

    I am thinking of the Sharp PG-B10S and any suitable screen as it needs to be portable as I will sometimes take it into the bedroom. :D

    Thanks.
     
  2. LV426

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    Realistically, it can't be done.

    A projector can never project black. It can only project no light, where black should be. If a projector projects no light, then what you see on the screen is wholly determined by the appearance of the screen itself, which is affected by ambient light.

    Intrinsically, in order to reflect the illuminated (brighter) parts of the projected image, your screen has to be white or nearly white.

    If there is ambient light, then those parts of the screen which are not illuminated by the projector will be illuminated by ambient light.

    To put it another way - if you look at your screen with the projector switched OFF - that's what colour black is going to be when you switch it on - the projector can't make it any darker.

    You really do need suppressed ambient light; the darker the better.
     
  3. Dilshad

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    Thanks for that. I had to read it twice, and then it made sense. Would having a higher lumens be better, ie higher than 1200.
     
  4. LV426

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    Well, it is probably true that our visual perception of brightness is more determined by relative values rather than absolute values.

    Whilst the overall brightness of the image thrown by the projector (as affected by all factors - lamp brightness, size of the image - smaller is brighter - etc) won't affect the darkness of black - it may affect your perception of that darkness.

    Nothing any projector can do can make the dark parts of the image be any darker than the colour of the screen and the amount of stray light falling on it make it. They just can't project darkness - only varying levels of additional light.

    But very bright bright parts of the image can make you perceive darkness where it doesn't really exist. I doubt, however, that any front projection system is going to give good results in illuminated conditions.

    In cinemas, they have hugely bright arc lamps to provide the light source; much brighter than any home equipment is likely to be. Yet, as you may have seen, when they project, say, ads and trailers before the house lights are turned off - the result is distictly poor.
     
  5. Peter Parker

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    Just to add to Nigels' info:

    One method that can improve percieved black level and reduce the washed out appearance of the image is to use a grey screen. I've seen a Firehawk in very high ambient coditions, and the Firehawk was very watchable, whereas the white screen wasn't. They work surprisingly well.

    Stewart Frehawk screens are very expensive though, so another manufactur may be worth looking at - Da-Lite for instance (there are others, such as Vutec). They do a 1.1 gain (the FH is 1.3) High Contrast Cinema Vision screen which may fit the bill. It won't work miracles, but it helps reduce the affect of ambient light. I'm not sure what portable screens they make (if any). Try places like www.harknesshall.com, www.drhscreens.co.uk, though I don't know if grey screen material is an option.

    A screen with gain will help brighten up the image, but won't work as well as a grey screen does with ambient light. Can you fit blackout lining to your existing curtains? That'll help reduce light ingress and improve the image on the screen.

    A grey screen with gain will probably work better than a grey screen with a gain of unity or less, so that probably limits you to the Da-lite. However, you could test how well a grey screen works by painting some hardboard or similar (a wall if your able :) ) with Duluxe Ice Storm 5 or 6, and see how things look. You'll have a better idea of what to expect. That means either buying or loaning a projector though.

    Maybe a member in your area can help you out by bringing their pj round. :)

    HTH

    Gary.
     
  6. Dilshad

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    Sorry for the late reply. Thanks for all the info.

    Any thoughts on the Epson EMP-S1H. On offer at £599 plus VAT.
     

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