Projectors
Projectors for presentation, boardroom and home theatre applications.
Projector Brightness Calculator
Work out the lumens a projector needs for the screen size, the room light and what the audience is watching.
Measure at the screen with the room set up as it will be used. A light meter, or a phone app for a rough figure, gives it.
Results
Screen area: 3.52 m²
Contrast target: 15:1
Light needed on the screen: 2,100 lux
Projector brightness: at least 7,383 lumens
With the ageing allowance: 8,859 lumens
Contrast targets are the four ANSI/INFOCOMM 3M-2011 viewing categories. The sum assumes the projector's own black level is small next to the room light. An ambient-light-rejecting screen lowers the brightness you need.
How it works
System contrast is the light from a white image plus the room light, divided by the room light alone. To reach a target ratio the projector must add (ratio - 1) x the room light, in lux, on the screen, and lumens are that lux x the screen area in square metres. The targets are the ANSI/INFOCOMM 3M-2011 categories: 7:1, 15:1, 50:1 and 80:1.
Need help designing a system? Talk to our team, or see all 23 free calculators.
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Screens
Projector screens for presentations and home theatre, in the aspect ratio and gain suited to your space.
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