1080p DLP Conference Room Projector
Light output. The IN3138HD is rated at 4,000 lumens maximum. On our test unit, we obtained a maximum usable output of 3,014 ANSI lumens with the projector in Bright mode, the lens at its widest angle, and the lamp at full power. Bright mode is greenish and has poor color, but it is useful whenever maximum output is necessary and color fidelity is a secondary concern.
Presentation mode, at 2,100 lumens, is more balanced than Bright mode. It has a bluish cast instead of Bright mode's green, while color and contrast are improved significantly. Presentation mode is the projector's default mode, and it's the one most suited to general office document display (hence the name). For Powerpoint slideshows and spreadsheets, Presentation is the way to go.
Game mode's 1,562 lumens produce better color than either Bright or Presentation mode, though they retain Presentation mode's slight blue tint. On some projectors, Game mode has less input lag than other modes, but that is not the case here.
Movie mode and TV mode, at 1,599 and 1,638 lumens respectively, are a lot like Game mode in that they have decent color and contrast, but their warmer color temperature makes them more appropriate for film and video use. Both modes still apply significant BrilliantColor, leading to highlights that are much brighter than other areas of the image.
The final mode, sRGB, measures only 782 lumens. However, sRGB mode produces 100% color brightness and the best contrast performance that the projector is capable of. This mode does not use BrilliantColor at all, giving it a natural, balanced appearance that is ideal for film, video, photography, and other content where color is crucial.
In any of these modes, you can use low lamp mode to reduce output by 24% while extending lamp life from 3,000 to 4,000 hours. Low lamp mode also cuts down on the projector's fan noise, which is almost a requirement in small rooms.
Contrast. As a conference room projector, the IN3138HD makes no special effort to improve its black levels, since it is most likely to be used in rooms with ambient light. However, in the projector's more color-balanced modes you can actually coax reasonable performance out of film and video content thanks to a decent gamma setting. With occasional film and video content, the IN3138HD will do just fine.
Color. Most conference room projectors don't bother with accurate color, but the IN3138HD does. The factory grayscale calibration for Movie mode is only about 50 degrees away from perfect 6,500K, though the gamut isn't anything to be proud of. If you're dead set on getting good color out of the IN3138HD, you can spend some time in User mode. A few small adjustments will give you a balanced image with no BrilliantColor that measures 6,500K across the board.
Sharpness and detail. The IN3138HD is quite sharp, especially with native-resolution 1080p content. Text is crisp and clean, while fine detail in video is plainly visible. Detail is less perfect in upscaled or downscaled content, but the only area that gave us trouble was small text (under 12pt) displayed in a scaled image. We sent a 1920x1200 signal to the projector, and the resulting compression artifacts made the 10pt text on screen appear blurry enough that some viewers might have problems reading it. But content without small text or critical fine detail was rendered cleanly, even at non-native resolutions. Try to send highly detailed content to the IN3138HD at its native 1080p, when possible.
Input lag. The IN3138HD measured 33 milliseconds of input lag over HDMI using a native 1080p signal. That works out to 2 frames of a 60 fps signal. That's fast enough for gaming, and video will not require an audio delay device.
|Review Contents:||The Viewing Experience||Key Features||Performance||Limitations|
|Comparison and Conclusion|
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