Home Theater
How to Buy a Projector
February 29, 2008 | by .(JavaScript must be enabled to view this email address)
Which chip? What about room size? How much should I spend? All these projector questions and more are answered by experts.
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Posted by james  on  03/01  at  05:46 AM

I think this article is overall a nice summnary of DLP projectors, but it completely ignores their LCD cousins.
or at least it is written for the perspective of installers and not a person building a home theater. for example using US dollars it would be possible for the “DIY enthusiast” with his $3000 dollar budget, wanting 1080p, could take for example either a Panasonic or an Epson. Both of which offer 1080p projectors for $3000. (from memory mitsubishi may have one as well) both triple LCD projectors. Even Sony have got in the game with their VPL-VW40.
and in the 3-10k range you go into much more than that. even 1080p DLP projectors, the infocus play big IN82 for example. so i think it is failing to consider, say prosumer level technology for the “DIY Enthusiast” :-p

Posted by Joe  on  03/02  at  11:23 AM

The article does a good job describing the nuances of DLP, but there are other excellent, if not superior, choices available that are not mentioned.  There is LCD projectors, that usually are three chip devices.  There is also LCOS, which have the D-ILA derivative from JVC and XSRD, which is the SONY variety.  Both of these LCOS variations are also three chip devices, which eliminate the color wheel and possibility of ‘rainbow effect’ that is common with single chip DLP devices.  The topic of front projectors should give equal time to each of these technologies to have a well-balanced coverage of this topic.

Posted by Bill  on  03/03  at  04:34 PM

“3 chip” isn’t an accurate description to use with LCD and LCOS.  LCOS and LCD intentionally try to use this confuse the situation.  A 3 chip DLP projector will blow away any LCD or LCOS projector in brightness, contrast, and colors.  1 chip DLP and LCOS each have their own pluses and minuses but be argued to be equal.  DLP/LCOS>LCD when comes to home video but LCD can currently be found at lower price points as well.

Posted by Joe  on  03/03  at  08:00 PM

Unfortunately Bill is displaying his bias for DLP by misrepresenting LCOS and LCD as not being 3 chip devices.  This is simply not true.  There is one chip for each of the three primary colors of light (red, blue, green) in these devices. This is why there is no need for a color filter wheel as is needed with single chip DLP devices. There are no 1 chip LCOS devices. LCD devices can be one chip, but these are generally for business presentations and not for home theater use, where the LCD devices are all three chip. LCD has less contrast because it is a light transmissive process, so some light always gets through the chips even for a black pixel.  LCOS variations are a light reflective process as is DLP, so its brightness and contrast is higher than LCD. The amount of light output from a device is really proportional to the wattage of the bulb and the type of bulb (xenon vs high pressure mercury vapor).  Therefore, Bill’s statements are simply not accurate. I am not sure why this topic generates so much acrimony amongst the different camps.

Posted by joe  on  03/05  at  12:52 AM

HD projectors. Will they word with Blu-ray?

Posted by Joe  on  03/05  at  08:35 AM

HD projectors were designed with Blu-Ray in mind.  They generally accept 1080p input, which is the native output for Blu-Ray and HD-DVD players.  Therefore, it is a perfect match for player and projector without any need to convert the player output signal’s resolution.

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