Multiple projectors can be used together to display a single image source, by each projecting a part of the final image. This allows for very bright and high-resolution projection, since the projectors’ performance is combined.

The projected images overlap; this causes visible banding across the display. Edge blending gradually fades out the video signal from one projector through the banded zone, while the adjacent projection or “channel” is faded up – eliminating banding.

In this way multiple projectors using edge blending can create large, bright, detailed and truly eye-catching displays. Particularly effective when showing movement with long rows of projection or in drum theatres when object movement can be displayed across a 360° field of vision.

Engaging presentations can be made when one projection channel switches from displaying a component of the larger image to another source. All Christie 3-chip DLP projectors feature built-in edge blending.