Review Contents
Limitations and Conclusion
Best Home Theater Projectors
Performance
Features
Ease of Use
Value
Intended Use:
DIY Home Theater
ViewSonic PJD7820HD Projector ViewSonic PJD7820HD
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Street Price: $726
MSRP:$789
3D: Full HD 3D
Contrast:15,000:1
Lumens:3000
Weight: 4.6 lbs
Resolution:1920x1080
Aspect Ratio:16:9
Technology:DLP
Color Wheel:6 segments
Lens:1.3x manual
Lens Shift:No
Lamp Life:4,000 Hrs
6,000 (eco)
Lamp Cost:n/a
Warranty:3 year
Connectors:  S-Video, Composite, RGB (x2), HDMI, USB, RS232
Video Formats:  480i, 480p, 720p, 1080i, 1080p/60, 576i, 576p

Viewsonic PJD7820HD
Home Video Projector Review

Allan Abbott, August 5, 2013

Limitations

Fan Noise - In Eco mode, fan noise is very low, but in normal mode, it is loud enough to be a distraction. It can even be loud enough to overwhelm the PJD7820HD's internal speaker during quiet moments. For a weekend crowd at home, you will probably need to use an external sound system, but this is due more to the weakness of the internal speaker than the fan noise.

Color wheel - The PJD7820HD has a six-segment RGBCYW color wheel. The "W" stands for White, and white segments in DLP color wheels boost white light output but not color light output, leading to an unbalanced picture with super-bright highlights and dull colors. White segments can also increase the appearance of color separation artifacts. And while color wheel speed is not listed in the projector's specifications, most projectors with white segments in their color wheels have 7200RPM (2x-speed) wheels.

No VESA port - Despite being a full HD 3D projector, the PJD7820HD is limited to using DLP Link glasses due to the absence of a VESA 3D sync port. This is common practice on inexpensive 3D projectors, including most of the PJD7820HD's competitors. DLP Link glasses are inexpensive and easy to find, but some folks prefer IR glasses because they, on average, have better black levels than their DLP Link counterparts.

Brightness uniformity - The dimmest corner of the PJD7820HD's image was significantly dimmer than its center, and brightness uniformity measured 67%. While most visible on pure white or pure gray screens, it can occasionally manifest in film and video as well.

Conclusion

ViewSonic has cracked the $800 barrier with a capable HD home video projector. The PJD7820HD is small, light, and at 3,000 lumens it is plenty bright even in living rooms at midday. It does, of course, have its flaws; poor brightness uniformity and a loud fan number among them. Its built-in speaker is underpowered. It does exhibit rainbow artifacts, so those who see rainbows will want to test it out before committing to a purchase. But despite these limitations, the PJD7820HD is an affordable, portable, fully 3D projector that can light up a living room for an afternoon of fun. The PJD7820HD is a capable home video projector, and it is nice to have another inexpensive option to choose from.

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Performance
Review Contents: The Viewing Experience Key Features Performance Limitations and Conclusion
 

Reader Comments(5 comments)

Posted Apr 2, 2014 6:42:11 AM

By JTH

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This only applies to 24hz 3D Viewing... Like Movies or LOW Frame rate PC Gaming... 24Hz

The Benq W1080ST/W1070 Have the X3 "Triple Flash" THIS gives them the total Refresh rate of 144Hz. - This only Applies to Games/Movies that are in 24Hz Resolution/Format -

24Hz X 3 Times (Triple Flash) = 72Hz/Per Eye = 144Hz Total Refresh Rate. - The Acer H6510BD is as follows - 24Hz X 2 Times (Normal double Flash) = 48Hz/Per Eye = 96Hz Total Refresh Rate.

This is how I figured it out. Seems that 144Hz only matters for 24hz 3D-Blueray Movies.

Posted Sep 30, 2013 9:09:42 AM

By Jose

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I have an HD23 and I'm looking foward to buying a 3D projector. I have noticed some Rainbown effect with the HD23 and althrough I have already get used to it I would like to get a projector that would give me less rainbown effect than the HD23. I use the HD23 on my living room and today I can use it to play videogames during the day, with closed windows. I have two projectors in mind: The PJD7820HD and HD131Xe (or Even the HD25). Which of these projectors creates less rainbow effect? Thanks

Posted Sep 6, 2013 1:45:01 PM

By gary

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Can this projector PJD7820HD hang from the ceiling upside down and ready for ceiling mount? Have reversing capability.

Posted Aug 24, 2013 6:13:20 PM

By Gray

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Is the 3D refresh rate 144Hz or 96Hz? Trying to decide between this and the Acer H6510BD

Posted Aug 19, 2013 11:39:32 AM

By spspspspsp

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What about the lumens in 3d mode? You nice folks at ProjectorCentral measure it for other projectors. I would love your technical comparison against the Optoma HD25/LV.

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