Plasma TVs and LCD Difference

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What's the Difference Between Plasma TVs and LCD TVs? by Tom Ace


Plasma and LCD TVs are the latest trend in home entertainment. Both offer unrivalled picture quality and resolution, while doing away with the bulkiness of the older rear-projection technologies. But with all of the hype surrounding these two types of televisions, what is the difference between them? Although they look- and are virtually priced- the same, they are not.

There differences are found in the way in which they display their pictures. Plasma TV technology is made up of hundreds of thousands of little pixels, each capable of displaying red, green, and blue colors. A plasma monitor often consists of two panels, which are filled with an inert gas, such as xenon or neon. When the pixels are excited by pulses of electricity, the gas becomes liquid, thus generating light. This light in turn then illuminates the pixels, causing them to display the appropriate color to form a picture.

LCD panels function in a very similar manner. A panel of thin-film-transmitters, or TFT, sends electricity to cells filled with liquid crystal. When the cells are struck by the electricity, the liquid crystals allow light to filter through. Unlike the pixels found in plasma TVs, LCD monitors create color by blocking out the appropriate wavelengths from white light.

So which is better? The answer to this question depends upon what you plan to use TV for. Do you just want to use it to watch movies and television? If so, then a plasma TV might be best, because they are capable of a higher better color saturation and contrast than their LCD counterparts and for displaying moving images. If you plan in spending a lot of time showing digital photography or plan on using the monitor with your computer, then a LCD display might be better suited to these purposes.

Both plasma and LCD technologies each have their advantages and disadvantages and your decision should ultimately be based on your monitor's application.


About the Author
Tom Ace is the founder of Plasma tv Resources a website providing information on plasma televisions

TV home projector

How to find the right home projector for your home by Dakota Caudilla


Some people think that buying a home projector is the same as buying a TV or AV system. The cost, of course, has everything to do with which home projector that you finally decide to buy but in actual fact, spending a little bit more time researching and finding out more about home projector systems can make your investment more worthwhile.

Brightness, typically, is measured in ANSI lumens. For a typical home projector system, the brightness can range anywhere between 700 and 2,000 lumens. The brightness, itself, does not determine the quality of the picture that you will receive from your home projector. The environment of your home will pretty much determine the outcome. Therefore, before you buy a home projector, take into account the ambience of the room that you'll be placing the home projector system in. If you have a special TV viewing room with controlled lighting, you don't and won't need a home projector that gives out too much brightness. However, if you're placing the home projector in the living room where there are open windows or ambient lighting, you'll need a far brighter home projector to make it worth your while.

Most experts recommend that TV rooms or dedicated home theatre spaces need a 700 lumens home projector or more. Rooms with ambient lighting should use a home projector with at least 900 lumens or more. In open spaces or living rooms with extremely high lighting, you'll need a home projector with at least 2,500 lumens.

When shopping for your home projector, take a quick look for a menu that is easy to use. Some professional or business home projectors are not as user-friendly as the projectors made for home users. Your home projector should make it as hassle-free as possible for you change the color, brightness, switch between HDTV and NTSC and adjust your video input sources. Most home projectors come with a remote control because it could be hard if your home projector is fixed on the ceiling or high up on the wall, but be careful and be sure to ask the sales person if the home projector unit that you're interested in buying comes with a remote control.

Do you want to mount the home projector on the ceiling or place it on a table? Well, both options have its advantages and disadvantages. Mounting the home projector on the ceiling gives more space, creates a more polished look for your viewing area. It won't be knocked off the table by kids and saves you time since you don't need to unpack, take it, install, and set the home projector up every time you want to use it.

With a light home projector, you can probably lift it from place to place without too much effort. With these home projectors, placing it on the table for each use is probably not a problem at all. In fact, portability has its advantages...you can literally take your home projector with you everywhere you go!


About the Author
Dakota Caudilla, journalist, and website builder Dakota Caudilla lives in Texas. He is the owner and co-editor of http://www.must-have-gadgets.com on which you will find a longer, more detailed version of this article.

LCD Monitor

Let's resolve the frequent troubles of LCD monitor Ourselves. by Willson Peterson


TFT LCD monitors are rapidly becoming shipped with new computers by default. On this page I explain you the frequent trouble of TFT monitor and how to resolve them.

No display or white screen:

If this is a new install make sure the refresh rate is not set too high. If you installed a new video card in your system make sure the refresh rate is not set too high. Under Windows, reboot the system and go into "Safe Mode" (Use F8 key on boot up) select safe mode and change the refresh rate under display properties to either 60Hz or Default. Then reboot the system and the screen will turn on. Maximum mode on 15" TFT screens is 1024x768 and maximum mode on 17" and 19" TFT is 1280x1024. Check to see if the green light is on with the external power adapter. Make sure all plugs are secure and the video cable is properly attached to the computer.

Dark screen in games:

TFT Liquid Crystal Display monitors are a unique devices that are manufactured to meet excellent picture clarity and reproduction in a native mode. Outside a native mode graphics will be darker, fine lines and text will be thicker. Native mode for 15" TFT panels is 1024x768, 17" and 19" TFT panels are 1280x1024. Most games can be configured to run at 1024x768 which should produce clean graphics.

Thick text:

As described above, TFT LCD monitors perform best in their native modes. Other modes can be used however the reproduction of text will vary in thickness depending on the mode the monitor is running in. Best text reproduction is view in the monitors native mode.

Faint or unseen text:

TFT monitors are Bright! So bright that sometimes text in a DOS program may be very faint or not seen. In order to see this text, you can reduce the contrast level down until the text is visible. TFT LCD monitors were manufactured to perform in a GUI environment such as Windows, Linux (X) and Macintosh. Older designed programs may have upgrades to enhance this effect to make the text legible.

Wavy lines on the screen:

In some instances you may encounter wavy lines on the screen. These are usually 1/4" thick and move in a vertical motion. This is caused by a noisy electrical feed from a wall outlet. If you change your vertical refresh rate under display properties to 75Hz this effect should disappear.

Small dot on screen:

TFT panels by their very nature are difficult to manufacture. KDS uses displays from various suppliers including; Samsung, Hyundai and Acer, who all guarantee the display to be 99.99% free from pixel defect. What that means is a 15" LCD display can have up to about 6-10 broken pixels and still be considered "acceptable". Broken pixels are individual pixels, which are stuck on, off, or as one particular color. Depending on their location and intensity, they can be next to invisible or obvious. This is common to ALL TFT screens and is not considered a defect by the screen manufacturer.

Dark areas:

Retail TFT LCD monitor products employ the use of a single TFT backlight. This backlight is responsible to deliver full edge to edge brightness across the screen. On some models the screen may not be as bright in the center or the edges as other areas. This is due to the design the actual panel manufacture took to keep costs down so that the TFT panel is affordable for the retail environment. Prices of TFT panels vary according to added features (TV tuner, SVIDEO etc.). They also vary according to the number of backlights that are in the panel. High-bright monitors with multiple backlights can cost upwards of $2,500.00 for a 15" panel.


About the Author
Willson Peterson is computer expert and network engineer. He is the author of and "Monitor Glossary of Terms."

http://www.ebookarticle.com to visit his website.