Front Projection HDTV: What’s in the Box?

A front projection HDTV system is not a ready-to-use TV. It’s simply a display projector, and it needs to be hooked up to an HDTV tuner, a DVD player, and a sound system to work. You’ll also need a screen to get the most out of your front projection HDTV, although a wall painted white will suffice.

If you have those items sitting around, then you’re ready to add a front projection HDTV. Choose a room with little ambient light-front projection HDTV images are easily washed out by sunlight or excessive room light. Room-blackening blinds may be needed, and the ideal room lighting is recessed ceiling spots attached to a dimmer switch. A long room is best, as you’ll need some distance from the front projection image-around 14 feet for a 110-inch image. Sitting closer will reveal motion blur, edge distortion, and other artifacts created by the front projector.

Front Projector Technologies

There are two classes of front projection systems. HDTV front projectors can support 780p to 1080p HDTV images from a broadcast signal or high definition DVD player. Office model front projectors do not support these higher resolutions. You may find a cheaper front projector at the office superstore, but it won’t give you an HDTV picture.

The same technologies used for rear projection HDTVs are in play for front projectors. Each has its own strengths and weaknesses, and people have varying sensitivities to the visual artifacts that front projectors create. When shopping, let your eye be your guide. Watch the same types of programming you’ll be watching at home, and choose the front projector that looks best to you.

LCD - Liquid Crystal Display front projectors shine a light through three liquid crystal chips, one red, one blue, and one green. This is called a “transmissive” technology, because the light shines through the LCD. These front projectors can have trouble creating black and dark colors, which reduces the sharpness of the image.

DLP - This “reflective” front-projector technology shines the image on either a single microchip or three microchips (one each for blue, green, and red) coated with millions of tiny mirrors. A fast-spinning wheel then colors the information. Considered the brightest and sharpest of all front projection HDTV systems, the spinning wheel can create a “rainbowing” effect as colors change that some viewers find distracting.

LCDoS - Liquid Crystal on Silicon is both a transmissive and a reflective front projector that shines a light through the red, blue, and green LCDs then bounces it off a mirror and back out through the lens. These front projectors deliver what some consider a superior LCD picture, but they are subject to sharpness issues as well as motion blur, which occurs on all LCD-based front projectors when the refresh rate cannot keep up with movement in the image.

Front Projector Considerations

All front projector HDTVs use a lamp with an average lifespan of 2,000-3,000 hours. Depending on how often you use the front projector, you’ll need to replace the lamp every 12-24 months.

Front projector manufacturers tout the large images that can be displayed, often in excess of 200 inches diagonal. But as the image size expands, the quality of the picture diminishes. In practical use, an image between 80 and 110 inches diagonal is the sweet spot of most front projectors.

Front Projector Setup

It’s best to set up your front projector once and leave it, as any movement will require you to readjust it to get the best image quality. Front projectors are lightweight and can be hung from the ceiling or placed on a stand that holds your VCR, sound system, and high-definition tuner. If you hang the front projector from the ceiling, you’ll need HDMI or Composite Video cables rated for the distance from the projector to your components. This can add hundreds of dollars to your setup cost.

If you put the front projector on a pedestal mount, make sure the stand cannot be jostled or moved easily, and make sure it’s high enough for the image to clear the heads of anyone watching.

Front Projector Screens

You may be satisfied with painting a wall matte white to use as a screen. If you decide to purchase a screen, look for a high-gain model. All screens are rated on a numerical system based on their gain. A rating of “1” will deliver the same results as that white-painted wall. Higher numbers will improve the sharpness of the front projector’s image.

Additional Features

Some front projectors include an automatic “iris” feature that adjusts the lamplight to balance dark and bright scenes. A “keystone” feature compensates for any problems with the front projector’s mounting angle, so you get a rectangular picture. Using the keystone can create image artifacts, and these vary among different models. Follow the manufacturer’s installation instructions for your front projector, and save the keystone for fine-tuning.

The viewing angle on a front projector tells you how far you can sit vertically and horizontally and still get optimal image quality. Paying more for a wider angle may not be needed, depending on your setup.

Don’t pay extra for built-in sound. No front projector can match a home theater receiver with good speakers.

Need to know more?

• Home Theater Reviews
  http://www.hometheatermag.com/frontprojectors/
• Front-Projection TVs: How to Choose
  http://www.crutchfieldadvisor.com/ISEO-rgbtcspd/learningcenter/home/front_projection_TVs.html?page=3
• Home Theater Projection Guide
  http://htmarket.com/home-theater-projector.html
• Video Projector Information
  http://en.wikipedia.org/wiki/Video_projector