Video:Different Types of Video Projectorswith Bob Murphy
Small digital video projectors can bring the movie theater experience to your living room couch. Watch this About.com video to learn more about different types of video projectors and how they can be used in home theaters.See Transcript
Transcript:Different Types of Video Projectors
Hi, I'm Bob Murphy, Branch Manager here at Listen Up Audio and Video in Boulder, Colorado. I am here today with About.com and I am going to be talking about different types of video projectors.
Various Types of Projector Systems
There is an array of different kinds of projectors available today. Even within the different types, all the way from the small boardroom style, which is meant to just throw a bright picture of an excel spreadsheet, or PowerPoint, all the way up to the more sophisticated home theater projectors that might be using similar technology, but have some refinements that make it more appropriate for home theater.
Old school way was a three-gun projector, CRT, or Cathode Ray Tube. The projector would have a red, green, and blue lens sticking out, and those were actually all converged on the screen to create a picture. It was a maintenance item, because the three guns had to be converged. The red, green, and blue had to be converged on the screen, and periodically had to be reconverged on the screen, in order to make them look correct.
Differences in DLP and LCD Projectors
The advantage of these knew smaller digital devices like the LCD and the DLP is that there is no convergence, it's all coming out the same lens, so you don't have the same maintenance issue, other than the fact that you do have a lamp, you have a light bulb that has to be replaced periodically.
Between the DLP and the LCD style of projectors, there are some pros and cons. DLP typically gives you a better black level, so your contrast range is preserved, because it can go to pure black. LCD does have the disadvantage of always being on in some portion of the screen, and so it tends to get a little more washed out look, and it is harder to get pure black. Initially, that was a huge difference between the two.
More and more, they have come up with ways of getting you a decent black level on the LCD style of projector, to where it is actually very comparable. There is still an advantage to the DLP, but to the average viewer, the other systems also do a very good job. The highest home theaters very often use a 3 chip DLP to get the purest blacks and the best brightness. On a really big wide screen, you typically go with the DLP.
Projectors Provide a Different Home Theater Experience
Even though the flat panel TVs have gotten bigger and bigger, 60,70,80 inches, the video projector is still the best way to show a real movie theater experience. We can put a movie projector on one side of the room, and a screen on the other side, and show a ten foot wide picture, that really rivals what you can see at the local multiplex. Thanks so much for watching. For more information about home theater, please visit us at About.com.