CNET puts projectors through a rigorous and unbiased testing process that’s the culmination of more than two decades of projector reviews. We use specialized test equipment, including a Photo Research spectroradiometer, a Minolta LS-100 luminance meter and an AEMC CA813 illuminance meter. The data is collected and collated by Portrait Displays CalMan Ultimate software, which helps us evaluate every PJ we review. Every lamp-based projector is “burned in” for 50 hours before measuring, and all projectors are initially set up using their most accurate color temp and color modes. Test patterns, sent from CalMan, are then used to adjust the various picture settings so the projector looks its best before measurement and evaluation. Contrast ratios are measured in each lamp and iris mode (when available). Once the projectors are fully set up and objectively measured, we watch a variety of content, including TV, movies, and games, both with the projector by itself, and compared side-by-side with two direct competitors.
Broadly speaking, we’re looking for the three picture quality aspects: contrast ratio, overall light output and color reproduction. Contrast ratio is the most important part of any projector’s performance. It’s the difference between the darkest part of the image and the brightest. While certain TV technologies, like OLED, can create a black that’s the actual absence of light, no projector technology can do this. Because of this, contrast ratios with projectors are far lower. It’s the difference between a washed out and “flat” image and one that’s more lifelike and “pops.” The better projectors will have a measured contrast ratio in the thousands. Most are between 500-1000:1.
Light output is the second most important factor, because it’s not only how bright the image appears on your wall, but also how big an image you can produce. Most modern projectors are significantly brighter than projectors from even 10 years ago. We…
Read the full article here