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Within DP’s Product Line: High Brightness vs. High Contrast Projectors – an Overview
Within DP’s Product Line: High Brightness vs. High Contrast Projectors – an Overview

What is a High Brightness Projector?
A High Brightness projector is DP's standard configuration of the projector when it is built. There is no aperture installed in the light path within the projector's optics, or within the lens.

Where do you use High Brightness Projectors?
A major perk to a High Brightness projector is that it can be used in most applications, and delivers maximum lumens to tackle larger screens or venues with ambient light. Here are a few recommendations on appropriate uses for a High Brightness projector:
  • Applications with ambient light
  • Applications with larger screens sizes, where a lower lumen projector will not provide adequate screen brightness
  • Applications that demand specific screen brightness levels to be achieved
      Note: Screen brightness is determined by size of the image, gain of the screen surface and light output of the projector. Throw distance and lens throw ratio do not determine brightness
  • Applications with extreme screen sizes or large audiences - true large venue
  • Conference rooms and residential media rooms – most of these venues include some level of ambient light

What is a High Contrast Projector?
A High Contrast projector is created by adding a custom engineered aperture to the light path within the projector's optics, as well as custom aperture within the lens. The apertures dramatically reduce scatter light within the optical system, which improves system contrast ratios. The apertures also reduce the constructed light that is allowed to enter the optical system, and this serves to further reduce black levels as a result of a linear reduction in the projector's specified brightness.

Where do you use High Contrast Projectors?
High Contrast projectors are best suited for viewing high quality content with vital dark area detail, in a light controlled environment such as theatrically dark venues. A High Contrast projector will sacrifice light output to increase image contrast and reduce image black level. A High Contrast projector works best in applications where no windows are present or in venues where windows can be covered and where lights can be completely turned off. It should be noted that any ambient light falling on the screen elevates the image black level and as a result, eliminates the benefit of the projector's high contrast and black level performance. Here are a few recommendations on uses for a High Contrast projector:
  • Applications with no ambient light - if there are windows in the venue, they should be equipped with blackout shades
  • Theatrically dark venues such as screening rooms and home theaters
  • Commercial applications where optimum video quality is required, and the venue is suitably dark - again, there should be no ambient light in order to gain maximum visual benefit from the enhanced contrast performance of the projector
  • Projection array applications, where projectors will be soft edge blended - the lower black level of DP's High Contrast models assures the lowest black level is retained, even in the area of the screen where projected images overlap

Posted on Thursday, October 27, 2011 (Archive on Monday, January 01, 0001)
Posted by mbridwell  Contributed by mbridwell

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