Projectors rule, and in my recent tests of less expensive (but still plenty awesome) units, a couple of trends have become clear. One is that I love watching big images in a dark room. Another is that on some projectors, I can see rainbows, and I don’t love them.

The “rainbow effect” is common to projectors that use DLP (digital light processing) technology, found on most of the units I tested including those from Viewsonic, BenQ and Optoma. Sometimes when watching a show with a high-contrast scene, like a white object on a black background, I see brief rainbow trails across the screen.

Epson, on the other hand, uses 3LCD technology, and its projectors like the Home Cinema 2045 ($700) reviewed here don’t have any rainbow effect. Competing DLP projectors like the Optoma HD142X($550) and BenQ HT2050 ($800) do, but offer similar picture quality for less money or better overall picture quality, respectively.
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Read full post here:
https://www.cnet.com/reviews/epson-home-cinema-2045-review/