Contrast ratio & ANSI

Discussion in 'Displays' started by Domonic A, Nov 6, 2003.

  1. Domonic A

    Domonic A Stunt Coordinator

    Sep 29, 2003
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    Domonic Ableidinger
    Is the contrast ratio and ANSI effect one another? I was hoping to find a projector with about 1500 lumens. I have come across a good deel on a Marantz that only has 700 lumens but has a 2600:1 contrast ratio.

    Can someone tell me in short how each effects the picture? I know if you have a room with some ambient light you want the higher Lumens so the picture does not wash out correct? I think the contrast ratio relates to the visability of the screen door effect?

    Thanks for your help.
  2. Scott Dautel

    Scott Dautel Second Unit

    Oct 6, 1998
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    Contrast ratio has nothing to do with Screen Door Effect (SDE). It is a measure of the amount of light hitting the screen for a pure white image versus a pure black image.

    You are correct in noting that if you have a room with ambient light, you want a relatively high ANSI Lumens rating. Also note that Lumens output is related to image (screen) size. i.e. a bigger projected image needs more lumens to look good in a room with ambient light.
    Regardless of lumens, you probably want a contrast ratio of at least 800:1.

    As a reference point, bear in mind that thed Sanyo PLV-70 (LCD PJ) puts out 2200 lumens at 900:1 CR ... pretty impressive, but then it costs $4400. The X1 puts out 1100 lumens at 2000:1 CR.

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