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Flat Panel Television

Jayson Pablo asked:


Cathode-ray Tube (CRT) displays have widely been used in televisions and computers for long. The displays have several advantages like wide viewing angles, superior colour resolution and low manufacturing costs. But these displays also suffer from drawbacks like excessive weight and high power & voltage consumption. The configuration of CRTs requires television sets to be virtually as thick as they are wide. Hence the demand for flat panel televisions is increasing day-by-day.

Technologists have developed alternative flat panel display (FPD) technologies to overcome the inherent drawbacks of CRTs. Prominent FPDs include liquid colour display (LCD), plasma display panel (PDP), vacuum fluorescent display (VFD), and electroluminescent display (ELD). A flat panel television display includes a flat panel on which a matrix of cells is formed between two glass substrates. A PCB module drives the panel. There are two types of FPDs – volatile and static.

A LCD provides a richer and higher resolution of colours as compared to the conventional CRT displays. A LCD essentially comprises of two glass substrates that are separated to form a predetermined space into which a layer of liquid crystals is injected. Flat panel televisions are gaining popularity these days as they improve visibility and reduce glare due to reflection of external light.

A FPD is preferred to a conventional spherical panel as it provides higher resolution power. These panels have exceptional colour accuracy and can display up to 16.77 million colours. The FPDs are gaining popularity among the masses as they are light-weight, consume less power and provide relatively sharp resolution.

The flat panel televisions are being preferred by consumers as they reduce image distortion, minimize eye fatigue and provide a wide range of visibility. The FPDs are usually less than 4 inches thick. These displays feature uniform screen brightness which means that they evenly illuminate all pixels across the screen. These displays do not use electronic beams and hence are immune to the effects of magnetic fields. Modern gadgets like laptops, cellular phones and digital cameras come equipped with FPDs. Flat panel televisions have sparked a revolution in home entertainment these days.



Filed under Shopping
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Rear Projection HDTV: Good Enough

Art Gib asked:


HDTVs have changed the face of television viewing. The HV’s possess a screen, which can match the size of projectors, and movie screens. And not just that, but they also include crystal clear pictures and Dolby Digital 5.1 stereophonic sounds, apart from the mammoth flat and wide screen. The types of HDTV’s are also varied, ranging from CRT and DLP to LCD and Plasma HDTV. A large number of leading TV manufacturers have also produced many interesting models. Many competitors like Samsung, Sony and Pioneer continue to one up each other with amazing picture quality and sleek design.

Being the number one electronics manufacturer in the world, Samsung has managed to gain a lot of market share and also become the official HDTV of the NFL. HDTV being a drastic launch from the ordinary television sets, they are seen as quite beyond the reach of the usual customer. But makers are trying to downscale the prices to accommodate everyone. The rear-projection TV (RPTV) is made with such an aim. These models are based on DLP technologies as developed by Texas Instruments. The particular model mentioned above includes TI’s latest chip designed on the lines of DLP, yielding better pictures at the same time. This model is one of the very first to use the new HD3 .55-inch micro-display of TI. It has a reduced chip size and a resultant cheaper cost of the chip. Large manufacturers takes into account four factors to determine the standard of the display performance which are contrast ratio, grayscale linearity, RGB color response and color temperature linearity. These factors significantly help towards ensuring that the display is able to distinguish between the subtleties in colors.

If you are an impule shopper or **** spending hours researching TV’s, sticking to a brand name manufacturer is probably your best bet. If you are a more picky shopper, you will want to visit various HDTV review websites to determine which one will be best for your home. You can choose between rear projection (which is usually cheaper) or you can go all out for a LCD or Plasma flat panel which will cost you more but typically have a better picture.

Although the picture of a rear projection HDTV isn’t quite as impressive, you may notice that you can save hundreds or thousands of dollars for the same size TV over a LCD or Plasma flat panel. For the average TV watcher, a rear projection is usually leaps and bounds above your old CRT monitor.



Filed under Electronics
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Basic Stages of Home Theater Rooms

crystal asked:


With the introduction of relatively cheap varieties of home theater equipment into the market, it isn’t surprising to hear of households converting old TV rooms into home theater rooms, where widescreen television sets and surround sound stereo components strike as superstars.

The process of converting old TV rooms or any room for that matter, into home theater rooms basically involves a two stage process, for more details visit to www.positive-idea.com the first stage dealing with the purchasing and/or upgrading of the necessary home theater equipment. The second stage revolves around setting up the actual room for conversion, adjusting the room to compliment the purchased/upgraded home theater equipment.

When it comes to purchasing/upgrading the necessary equipment for home theater rooms, two main devices have to be primarily considered. First the main viewing screen, followed by a surround sound system. As a home theater system’s basic difference from a simple TV lies on a surround sound system, “tailor cutting” a room to maximize a surround system’s performance is quite essential.

Once the necessary home theater equipment is purchased, the second stage in converting old TV rooms to home theater rooms come into play.

Enclosed space would be more ideal for home theater rooms, as open rooms don’t have good acoustic quality. Most top-of-the-line home theater rooms are lined with curtains and have carpeted floors, improving the overall acoustic quality of the room, taking this layout from actual movie theaters. It isn’t necessary for home theater rooms to be rigged with curtains and carpeted floors, but it would greatly enhance sound and lighting conditions. As with most enclosed rooms, for more details visit to www.greateducationonline.com curtained or not, a good ventilation system which doesn’t compromise the acoustic quality of the room would be a good idea. Home theater rooms should be comfortable, aside from simply being functional.

When it comes to positioning speakers, a basic understanding on how a surround stereo system successfully operates would greatly aid in positioning the system’s components in a home theater room.

On a basic level, a surround stereo system involves speakers to be positioned around the main viewing screen, making it an anchor point. Two front speakers are positioned near the main screen, with two more on the sides, next to where the viewers are, and two more behind the viewer’s area.

Most surround speaker packages include a subwoofer, ideal for bass boosting, which could be positioned behind the viewer’s area in the layout, and a/v mixing systems which handles the distribution of sounds to the various speakers.

Successfully positioning surround speaker systems greatly enhances the sound output quality of home theater rooms.

Lighting adjustments, chair types and layout, overall room color, as well as wall décor, come as personal preference dictated factors for home theater rooms.

Once this stage of converting old rooms to home theater rooms is completed, all that’s left to do is enjoy.



Filed under Theater