HDTV Projector? Secrets, Tips, FAQ .



HDTV Projector? What About LCD burn and Lamp life...

Read on below..

There is a lot of confusion around about what actually is a True HDTV Projector.

It's easy to understand why the confusion exists.

First, let's start by defining HDTV.

There is one Full HDTV format currently and it is 1920x1080p.

Now of course there are others, namely 720p and 1080i...

The "p" stands for progressive scan, meaning no lines on screen.

The "i" stands for interlaced scan or lines on screen.

The numbers relate to the number of pixels in the panel.

In a 1080p panel: 2,073,600 pixels

In a 720p panel : 921,600 pixels

This means the LCD panel or DLP (Digital Light Processor) inside the projector is built to that physical panel size.

And, no matter what kind of signal is fed to the processor chips in the unit, if it is a lower grade signal, it is "upgraded" or expanded so that it "fits" the lcd/dlp panel inside the projector.

And vice versa, if the signal is "larger" then it is compressed to fit the smaller panel.

A 1080i panel is not a real panel but rather, it is a VIRTUAL panel size, meaning that it is created in the graphics processor inside the TV and deinterlaced to fit the physical 1080p panel...

Remembering that fixed panels are inherently non interlacing.

Producing a true HDTV signal from a Non HD signal actually can't be done, but the projector's circuitry tries very hard.

And the upscaled result may produce more than acceptable pictures too!

But not real HDTV...

All HD signals are full widescreen, and can be displayed as you want by settings in the menu system

Now there is one other thing to consider.

Will the projector be fed with HDTV signals? Or not?

Because if you plug the Yellow cable from your DVD or STB in to the projector, you WON'T get High Definition.

Why? Because you must use a HDMI cable or component cable.

HDMI is a single cable that supplies a High Definition picture and sound to your projector.

By far, the easiest way to connect your HD equipment

Your set top box should have one as well, if it is High Definition.

Newsflash... Not all DVD players or STB's have a HDMI cable.

In which case, you may have Component or Green Red and Blue cables and inputs which will get you out of trouble.

BUT... Don't forget to connect your sound cables!

And , if you don't use HDMI cables.. (Which carries all Video and Surround sound signals)

You will have a literal forest of cabling behind your set.

On the Set Top Box side of things, bad news...

Which model projector should you buy?

Well, if it was my own purchase, I would get the Mitsubishi reviewed here which is the Best HD Projector, By a Country Mile! Why do you need a 1080p HD projector?

Because when you expand the picture out to the maximum size, you can tell if it is 720p versus 1080P... Explained...

For those who are having problems with the difference between digital and HDTV and so on, go and find out What Is HDTV and Digital TV? Are they the same thing? Not all broadcasters currently transmit full HDTV.

They can't, because most of their content is currently made for older non HDTV transmission.

Some programs, such as News broadcasts etc, it is made and transmitted in 720p or 1080i, but generally, they are transmitting "upgraded" or upconverted programme material.

Saves them money, basically.

And that means you can tell when they are transmitting old 4:3 content.

It doesn't fit the screen.

Either you will have black bars at top, or the sides of the picture.

Read about Widescreen and Aspect Ratio. Demystified...[New Window] By the way, The Networks all have their own version of what HDTV is just to add another wrinkle...

And it will take time until HD programming catches up, and full HDTV transmission is the norm..

Maybe we may have a lower version of HDTV for example, 1080i or 720p for broadcast, who knows as yet, it is all in flux right now...

Game machines like the PS3 from Sony are capable of playing Blu-Ray High Definition titles, and of course HD Games too..

Remember, the signal will be "upgraded" or upscaled to fit the panel inside the HDTV Projector, if you are planning to play some of your old titles on the unit.

Of course, a 1080p LCD optical engine will not need to upscale the signal if it is 1080i, just "deinterlace" it or remove the lines.

BTW, The downside of HDTV Projectors or Rear Projection sets?

...No 1. The cost of replacing the bulb. They can be really expensive, like $500 and they need replacement fairly frequently.

Like every couple years. Ouch.

Look for a model that does not have a bulb. :)

Some rear projection sets, like Panasonic Lifi HDTV Rear Projection Set, don't have a regular bulb..

Panasonic PT-61LCZ70 61-inch 1080p LIFI HDTV to be exact...

Unfortunately this type of bulb it is not available in a HDTV projector, as yet.

...No 2. The outrageous costs of replacing the LCD optical block... Why?

Because of LCD Burn In, which gives you a picture with a shaded section, or a red, green or blue colored section.

Which doesn't look great at all.

I have seen this with a few brands...(No Names mentioned, No Pack Drill :)

One more thing, the display from projectors looks much better with the lights off.

If you are thinking that you can watch a HDTV Projector in your brightly lit living room, well, you can't, really.

Most of the HDTV projector types around that is. There are Super Bright exceptions.

If you do have a bright room, then consider a...

For Best performance in normally lit rooms, Plasma HDTV Or, for Best performance in brightly lit rooms, LCD HDTV Just for your information, a very important subject is LCD versus Plasma...

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