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1. What do you need to consider before you buy your flat screen LCD TV? Determine the right screen size based on your budget and your floor plan. Until now, LCDs have been more common in smaller sizes (27" and less). One reason is that quality-control issues have long limited display size: Increasing the size of an LCD panel means adding pixels and three transistors for each additional pixel. It also makes distributing the light evenly more difficult, which, in turn, interferes with color reproduction. This is why colors may appear slightly off or faded in LCDs larger than 37". To get the most out of your investment, remember what your mother always said about sitting too close to the TV-that it's no good for you. Well, she might have been thinking about your health, but we're thinking about your viewing pleasure. For the optimal viewing experience, you need to maintain the right distance between your viewing area and your television screen. Note: Some audio-visual critics have observed that fixed-pixel displays tend to show their pixel structures at closer viewing distances, so one might notice a sandy texture to the screen when the set is viewed too close. This underscores the importance of maintaining an appropriate viewing distance between you and your LCDs monitor when configuring your viewing area. The right distance depends on the size of your TV: · For 20 to 27-inch displays, you should be able to watch comfortably from 2.5 to 5 feet away. · For 32 to 37-inch TVs, you should sit back 6 to 8 feet from the screen itself. · For 42 to 46-inch TVs, you'll need 10 to 14 feet between you and the screen. · 50-inch LCDs displays look best when viewed from 12 to 16 feet away. Get the lowdown on HDTV compatibility. If you're one of the 55+ million households sitting astride cable systems that can carry HDTV signals, your LCD TV will enable you to take advantage of the slightly better (10-15%) picture you can get from a higher resolution unit displaying HDTV broadcasts. Most LCD units come with built-in ATSC tuners, which enable them to pick up over-air HD broadcasts using antennas. In addition, manufacturers have begun packaging ATSC and cable tuners in LCD TV sets, making them optimal for watching HDTV-on local as well as national broadcasts. · Tip: To learn more about the availability of HDTV broadcasts in your area, or for a lineup of programs shown in hi-def, consult the Consumer Electronic Association's website
2. What do you need to consider before you buy your flat screen LCDs TV? Determine how you're going to install your LCD TV. LCD technology affords consumers new options when it comes to the physical placement of their TV displays. Gone are the days when you had to configure a room around the television set. Now, you can incorporate the TV into almost any décor, if you give a little thought to the matter beforehand. There are half a dozen ways to install your new LCD TV, which virtually ensures that you'll find the right way to fit one in your home. You can mount your flat-panel display on almost any wall in your home. · Flat Wall Mounts allow you to maximize the space-saving benefits of plasma technology. This option is generally the least expensive, and it adds just under two inches to the monitor's total depth. · Tilt Wall Mounts enable you to place your TV above eye level, keeping it out of the way though readily viewable from anywhere in the room. This mounting option is typically used to install LCD monitors above fireplaces and in bedrooms. The tilt wall mount adds from 4 to 6 inches to the depth of the mounted display.
· Table Stands are another popular way to display LCD units. Realize, though, that these units are not one-size-fits-all appliances. Each display has its own custom-fitted table stand. Oftentimes one is included with the monitor itself; occasionally, though, you will have to purchase the stand separately.
· Articulating Wall Mounts make use of swivel arms to render the LCD unit flush with the wall-and out of the way-when not in use. Pulled out, this mounting device allows you to turn the display 120° to either side and as much as 10° up or down.
· Ceiling Mounts enable you to mount your TV where you want it-in the event that a wall isn't handy. This option is generally coupled with a tilt mount, so that the display can be adjusted downward for easier viewing. Lengths of ceiling mount poles vary according to customer needs, though the standard lengths are from 24 to 43 inches.
Besides looking cool and oh-so futuristic in your living room, what are the advantages of owning an LCD TV or monitor? It's easier to watch. Flat panel TV displays like LCDs and Plasmas are significantly brighter and feature higher contrasts than traditional CRT sets. Which means that an LCD TV will perform exceedingly well under most ambient light conditions. A brightly lit room won't wash out its picture, nor will lamplight cause a glare on your television screen. The beauty of these flat screens is that you don't have to turn out the lights to see the image clearly and easily. Nor do you have to worry about eyestrain, since neither LCDs nor Plasmas flicker the way old-fashioned TVs do. And, you can watch TV from almost anywhere in a room since flat-screen LCD television displays can have up to a 160° viewing angle, which means your TV will look good when viewed from any point 80° in either direction from the center of the display.
One issue affecting the overall quality of the picture reproduced on LCDs has to do with dot pitch. This term refers to the distance between subpixels of the same color in adjoining pixel triads. The closer these "dots" are to one another, the sharper the resolution will be. This is especially true when displaying computer signal images and graphs. And the picture in front of you will be more realistic and detailed. Higher dot pitches also increase the viewing angles of LCD panels. Since dot pitch is measure in millimeters (mm), a good rule of thumb is this: Smaller dot pitches make for sharper images. You generally want a dot pitch of .28mm [" 10,000 pixels/in2 of your display] or finer. Note: Plasma TV displays have long been touted as having wider viewing angles than comparably sized LCD monitors. But recent improvements in quality have made LCD televisions and monitors comparable to Plasma TVs with respect to their viewing angles.
According to Sharp, a leading manufacturer of LCDs , the newest generation of LCD displays have just as good viewing angles as plasma sets, but this is only true Some Addtional Information About LCD TVs
Note: Some LCD televisions have outboard media receivers, though many-like Toshibas-don't.
Always inquire about extra hardware before you buy: You won't always see your LCD monitor pictured with an external receiver (even if it has one), so it's up to you to find out whether there is any "extra" hardware you need to know about. The picture is smooth, colorful, and (best of all) wide. LCDs have none of those annoying scan lines that conventional sets do. This owes to the fact that each subpixel has its own transistor electrode, which creates smooth, evenly lit images across the entire surface of the display. It also enables these displays to reproduce images that are saturated with color. [256 shades of red x 256 shades of green x 256 shades of blue " 16.8 million different colors!] Note: All this requires an enormous number of transistors-upwards of 2.4 million for displays supporting a typical resolution of, say, 1024x768. This means that, if there is a problem with any one of these transistors, a subpixel will be affected, which causes the pixel associated with it to fail. Dead pixels will emerge over time and with use. In general, though, the number of dead pixels affecting a given display will be few enough so as to go virtually unnoticed by the average viewer.
Recent advances in LCD technology have markedly increased the response time of these displays, resulting in even smoother on-screen presentations. One way to think about response time is in terms of the amount of time it takes a pixel to "refresh" itself-i.e., to go from being active to being inactive, which is to say, ready to be re-activated). Response time is measured in milliseconds (ms), with the best LCD monitors now clocking in with response times under 20ms. Slower response times (>20ms) can cause the image on the panel to lag and appear jerky, an effect known as "streaking" or "trailing."
Another phenomenon associated with slower response times is "ghosting." This occurs when the display is made to switch quickly from light to dark states (or vice-versa). In these instances, on-screen images may appear to stay on the screen belatedly. LCD displays come either with a 16:9 aspect ratio (i.e., 16 units wide to 9 units high), the proper one for viewing HDTV and for watching DVDs, or with a 4:3 aspect ratio, the norm for most broadcast television shows. If you opt to go with a widescreen (16:9) display, does this mean that you'll have to watch some shows where the image is distorted or stretched unnaturally? No. When displaying a "normal" or 4:3 picture image from satellite, VCR, or cable TV, the image can be viewed in a number of ways-in its original format (with black or gray bars on the sides of the screen), or in "full" mode (where the image is converted or "stretched" using specially designed algorithms to reduce the visible stretch marks as much as possible). Again, the quality of the picture produced under such circumstances depends largely on the quality of the television with which you scale-up 4:3 pictures or scale-down 16:9 ones. Nevertheless, this is only a temporary dilemma: Since HDTV is shown in widescreen, this is the format of the future for much of broadcast television. The display is multi-functional and long-lived. An LCD is a television monitor, capable of displaying HDTV, regular TV, and home video. It's also a computer monitor. In fact, it can accept any video format. LCD displays typically include inputs for (a) composite video, (b) S-video and component video, and (c) one or more RGB inputs from a computer. Because of the high resolution of LCDs , text and graphics look especially sharp when viewed on them, which makes them the best solution for displaying data and web-based content. Note: Some LCDs (including many by Sharp) do not come with RGB inputs. If you plan to utilize your LCD display as a computer monitor, be sure to check out the specs of the unit you're thinking of purchasing. You can expect to use your LCD monitor in many capacities for many years: The average lifespan of one of these displays is 60,000 hours. If watching TV was your full-time job, and you did it 24 hours a day, it would take you almost 7 years to wear out your LCD display. With more normal viewing habits of, say, 8 hours per day, you can extend the lifespan of your TV by a decade or more (to about 20 years)! Note: The lifespan of an LCD display is generally longer than that of similar-sized plasma displays. Some manufacturers claim that their LCD s can last upwards of 80,000 hours when used continuously under controlled conditions (e.g., in a room with "standard" lighting conditions and 77° temperatures throughout). Just how realistic such claims are is debatable. After all, whose living room has no windows and remains at a perfectly comfortable 77 degrees year-round? A more immediate concern is the actual lifespan of the light source in your LCD . This is perhaps THE critical component of your display unit. It is particularly important for maintaining a proper white balance on your TV. As these florescent bulbs age, colors can become unbalanced, which could result in too much red, for example, in your picture. So, it pays to buy name-brand displays. You will definitely pay more for better LCD display brands like Sharp, Toshiba, JVC, or Sony than you will for cheap Chinese or Korean variety knock-offs, but you'll get a backlighting bulb of higher quality and, in the end, a TV whose colors will stay truer longer. In some cases, the warranty for this particular feature can be shorter than for the display as a whole. This means you might have to buy a whole new LCD monitor because the coverage on its backlight has expired. Moreover, some bulbs can be replaced, while others are built in to the unit itself. You should definitely do some research on the backlighting system, how it's configured, and how it's warranted.
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