Tuesday, 29 March 2011


HDTV Shopping Tips
  • Model : HDTV Shopping Tips
  • Brand : -
  • Category : news, Tips

Purchasing an HDTV is a tricky proposition. To avoid ending up with a dud, read these tips before you buy.

Buying an HDTV can be a daunting task. Unlike a smartphone, which typically sells for a few hundred dollars, an HDTV is a major investment that could last you for several years. For that reason, many consumers spend a lot amount of time poring over reviews, measuring sets to ensure that they'll fit the available wall space, and trying to find the best television in their price range.But other, more-technical questions are also relevant.

Should you opt for a 720p set? Do you really need 3D? Is the picture quality that a set has at your local Best Buy a good indicator of its picture quality in your living room? For help in answering these questions, read on.

720p or 1080p?
You've probably heard people talking about 720p and 1080p quite a bit. But what do those terms mean?

The p at the end of 720p and 1080p stands for progressive. The numbers before the p indicate that the HDTV draws either 720 lines or 1080 lines of vertical resolution across its screen to create the picture. When progressive programming is sent to a television, the set displays the lines of resolution in sequential order. That helps deliver a nice, clean image. Vendors label televisions as 720p or 1080p to tell customers the maximum resolution that the particular set can output.

At times, you may see an i instead of a p after 720 or 1080. That i stands for interlaced. When you watch content in 1080i, the set draws the picture with 1080 lines of resolution. But the TV displays the odd-numbered lines before the even-numbered ones, resulting in some visual-quality quirks (especially when you're watching sports or fast-moving action sequences in movies) that make 1080p a more desirable resolution.

In cable and satellite broadcasts, programming is available in 720p or 1080i. DVDs are recorded at 480p resolution, and Blu-ray movies at 1080p resolution.
Will you be using your set exclusively to watch cable or satellite programming, or are you likely to watch movies, too? If movie watching is in your plans, do you intend to buy Blu-ray movies in the future or stick with DVDs? Figuring all of that out should help you decide whether to opt for a 1080p set or a 720p set.

But resolution isn't the only factor to consider in making that decision.

It's becoming increasingly difficult to find 720p sets on store shelves. The costs associated with producing 1080p televisions have dropped; and with Blu-ray adoption on the rise, vendors recognize that offering a maximum resolution of 720p might not satisfy most customers.
For the most part, a 720p set is suitable only for buyers who are on a budget or who don't plan to watch Blu-ray films. For everyone else, since buying an HDTV is a long-term proposition, a 1080p television provides the best future-proofing.

Want to see the difference for yourself? We took screen captures of the same scene in both 720p and 1080p on a PC to show the difference in resolution. Open these two images yourself and compare them. When you zoom in, you'll see that the 1080p image looks much crisper and more detailed--and the difference gets magnified when you look at images displayed on a large TV screen instead of a smaller PC monitor.

Don't Believe In-Store Picture Quality
One of the biggest mistakes consumers make when buying an HDTV is to think that the set's picture will look just as good at home as it does at the store. This error often leads to extreme disappointment.

Most retailers display televisions with picture-quality settings that are ideal for viewing under the fluorescent lighting of a typical in-store environment. Also, all of the pastel colors you see are adjusted to capitalize on the notion that the more vibrant the picture is, the better the television is.

In fact, a properly calibrated HDTV might look rather dark at first glance. But what you lose in vividness, you get back in detail and in energy-cost savings.

Does that mean you should opt for the dullest-looking set in the store? Not a chance. But there are some things you can do at the store to improve your ability to evaluate the available sets accurately.

First, make sure that the HDTVs you're interested in are displaying an HD video source and that they're using an HDMI cable to pump that content to the television. If one set shows standard-definition content while another displays HD programming, you won't be able to compare the televisions fairly.
Next, ask the salesperson whether you can change the picture settings on the TV. Changing its video settings so you can see what it might look like at home can help you avoid getting the wrong idea about a showroom-optimized set.

You might also want to bring your own Blu-ray film with you to test out the HDTVs' picture quality. If you bring a movie into the store with you, make sure it's a film you know well. If you've seen it often enough, you'll know what particular scenes should look like, and that information should go a long way toward helping you make the right buying decision.

Does a Lower Price Mean Poorer Quality?
Generally, if one device costs less than another, the cheaper device is of lesser quality in some way--so you get what you pay for. But some instances, the television industry bucks that trend.

Let's say that you've decided to buy a 46-inch television--and of course you want the best-quality television you can get for the amount you're willing to spend. You see one high-priced LCD that comes with many of the features you're looking for, but you also see a lower-priced set that has the same features. Should you be scared away by the cheaper set because of its price tag?

Not necessarily.

Vizio, for example, is a budget-conscious television maker. Though its sets may cost hundreds of dollars less than comparable TVs from its chief competitors (like Samsung), they hold up quite well against those rivals in feature selection and image quality.

But before you commit to Vizio, you need to be aware that not all models the company makes are equally good bargains. Models from the company's XVT series of HDTVs consistently perform well in our reviews. They offer most, if not all, of the extras included with other sets of their class, plus a competitive level of picture quality. But the XVT models are more expensive than many of the other sets Vizio sells. The cheaper models, such as the M-series and the E-series, come with fewer features and lower picture quality, though they do sell for a much lower price, as well.

This pattern is the same for every TV vendor. Whether you choose a Panasonic plasma or an LG LCD, you'll have several models to choose from that extend across a wide range of prices and quality levels. And in some cases, Vizio's pricing may not match that of other vendors--especially at the low end.

Don't be scared away by low prices. Even inexpensive models deliver a level of quality that was available only from top-of-the-line sets a few years ago. As long as you know what you want from your new television, and you have a clear idea of what you're willing to spend, and you're aware of the better sets in any company's product line, saving a few bucks on a cheaper set is never a bad idea.

Go 3D
Over the next few years, you'll be hard-pressed to find televisions on store shelves that lack a 3D capability. That's because the cost of adding 3D to sets is minimal. And as more content providers offer 3D, consumers will naturally want a TV that can access it.

So, should you get 3D in your next HDTV? It's tough to say. If you're on a budget, you can save hundreds of dollars by sticking with 2D.

For example, the 2D, 40-inch Samsung UN40D6000 sells for $1099, while the 3D-capable Samsung UN40D6400 costs $1299. Aside from the 3D feature, both sets are extremely similar, so you'll pay $200 extra for the 3D viewing mode.

Some hidden costs go along with 3D viewing. One is the price a 3D Blu-ray player (or PlayStation 3), if you want to watch content that isn't readily available from your cable or satellite provider. In an all-Samsung setup, you'll pay $180 for the cheapest 3D Blu-ray player the company offers. You'll also need 3D glasses--and Samsung's eyewear runs $200 per pair. So after buying the 3D set, the accessories will set you back another $500 or so.

If the set you have your eye on comes with 3D, don't let the third dimension scare you away. When you're not watching 3D programming, you get the same 2D experience you're used to--3D capability has no impact on 2D picture quality.

Wednesday, 5 January 2011


About LED technology
  • About LED technology
  • Brand : Buytvstore
  • Category : Articles

A light-emitting diode (LED) is a semiconductor light source. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared wavelengths.

When a light-emitting diode is forward biased (switched on), electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy gap of the semiconductor.

A LED TV is an LCD TV that uses LED backlighting rather than the cold cathode fluorescent lights used in traditional LCD televisions.

The use of LED backlighting has a dramatic impact, resulting in a thinner panel, less power consumption, and a brighter display with better contrast levels. It also generates less heat than an ordinary LCD TV.

This backlight does not change the quality in the image of the monitors or televisions because the panel technology is the same.

The LEDs can come in three forms: dynamic RGB LEDs which are positioned behind the panel, white Edge-LEDs positioned around the rim of the screen which use a special diffusion panel to spread the light evenly behind the screen (the most common) and full-array which are arranged behind the screen but they are incapable of dimming or brightening individually.

Practically, LED TVs differ from conventional LCD TVs because they produce images with greater dynamic contrast. With Edge-LED lighting LED TVs can be extremely slim. Models on the market can be approximately one inch thick, offer a wider color gamut, especially when RGB-LED backlighting is used and generally 20-30% lower power consumption.

The History Of 3D Films And Glasses
  • The History Of 3D Films And Glasses
  • Brand : Buytvstore
  • Category : Articles

3D movies are motion pictures that use special technology to upgrade the audience's illusion of depth. Modern cameras and hardware are used to shoot the images and then stereoscopic tools and eye glasses are used to provide watchers with the illusion of depth. The most important of the 3D movie watching experience is the eye gear that must be worn in order to do so.

The stereoscopic movie era began in the early 1890s. A man named William Greene, around that time, developed a process of making movies that involved three dimensions and then filed a patent. His technique involved using stereoscopes to view two images being played side by side as one. Greene's method, though groundbreaking for its time, wasn't practical enough for use in theaters.

The very first 3D film that was played to a paying audience was The Power Of Love. It premiered in 1922 to a packed Los Angeles Ambassador's Hotel. The movie consisted of dual red and green strips and, to view it, the audience members were given anaglyph glasses. Despite receiving rave reviews, the film was lost after a brief exhibition in New York.

Small jumps in three dimensional technology were accomplished slowly over the next few years but by the early 1930s, interest in the format had dipped. The Great Depression had swept through the country and left behind a nation filled with people who were understandably uninterested in the film industry in its wake.

In 1936, a series of 3D reels called Audioscopiks was commissioned by MGM. Collectively, the movies were considered a success and they were nominated for one Academy Award that year in the novelty short subject category.

Starting in 1952, Hollywood experienced a sort of golden era when it come to 3D films. Every single major production company released a number of three dimensional movies during this period. In fact, so many films were released that the general public began to tire of the format. By the mid fifties, the decline in interest and high costs of shooting 3D movies had caused most production companies to abandon the format altogether.

In the seventies Space-Vision 3D, a brand new method emerged and helped usher in a much needed revival for the format. The technological advances allowed three dimensional films to be played and shot in ways that didn't hurt the eyes of the audience when it was watched. When Stereovision used the technology to make their profitable and popular film, The Stewardess, others began following suit
once again.

Starting in the middle 2000s, the advancements used to make these movies has been steadily improving. The three dimensional eyeglasses used to view the movies are no longer the weak paper pieces that they used to be. Most films today need polarized eye wear to watch them. The items closely resemble normal sunglasses each in their sturdy frame and lenses. The items offer a more realistic watching experience and are the standard for most three dimensional films and theme park attractions.

Monday, 13 December 2010


Plasma TV and LCD TV: Which is better?
  • Plasma TV and LCD TV: Which is better?
  • Brand : Buytvstore
  • Category : Articles

We believe many people are still confused which one is better Plasma or LCD so Buytvstore try to give a little clue so you can be certain of your choice.

Is there any difference in picture quality between plasma, LCD and regular
TV?
Between Plasma and LCD produces a good picture so arguably not very significant in terms of picture quality but for regular TV (CRT), still some people prefer this type because it can produce better-quality picture as a whole.

What advantages are in its plasma than LCD?
Plasma usually can display a wider viewing angle than LCD, so as we all know the wide angle of view (angle view) the better because it will facilitate you in determining your sitting position. Plasma can better produce sharp images, especially in terms of "capture" a rapid movement in a film that is being watched. The latter is the problem of pricing where the price of plasma is cheaper than LCD

What advantages are in its LCD than Plasma?
LCDs have higher resolution than Plasma TVs for the same size. LCDs consume less power than plasma (approximately 30% lower). LCD has a life span (time consumption), which is longer than usual LCD Plasma which can last up to 60,000 hours while the use of plasma about 30,000 hours (later there is also the Plasma
that can last up to 60,000 hours)

Which one is better for you? Plasma or LCD?
If you want a TV with a small size or under 50 inches then LCD is the best choice considering the price for the size of the LCD is much cheaper even cheaper semakian today. If you want a large TV or more than 50 inches so we advise you to buy a Plasma for Plasma prices for sizes above 50 inches is much cheaper than the LCD. Make sure that the TV has an Integrated / digital tuner (not analog) to get a better picture.

Sunday, 12 December 2010


type of TV
LCD HDTV
LCD is short for 'liquid crystal display' which is a type of display that uses an array of crystals in front of a backlight source. When voltage is applied to these crystals they twist to allow varying amounts of light to pass through colour filters, this is a process that happens at every pixel to essentially display the entire image on the screen or TV.

With LCD being such a widely available display technology, you won't have a hard time finding many different styles and brand names. Although not being available in larger sizes used to limit the LCD technology, this is no longer true. The range is from about 7 inches to 65+ inches in size. The smaller and more common sizes are also very budget friendly because they are mass produced on such a large scale for everything from TVs to computer displays. When you get into the larger LCD sizes, usually 50+ inches, then the price starts to get a little more costly than some of their plasma and DLP counterparts. Since the main source of an LCD's image is produced by the flat panel and the accompanying backlight, these are not very deep TV's and are popular for wall-mounting and also outperform all other TV styles when displaying static images. The good news is that with LCD panels being such widely produced in such a large variety of sizes now, prices are continually dropping on this technology. Being very budget-friendly is what makes LCD such a popular choice amongst typical home users who aren't looking to spend a lot of cash to build a big home theater system. Due to the design of an LCD panel there is no need to worry about any sort of “burn-in” time where you need to be careful with the display settings. We'll touch more on this subject in a bit. We are also past the days of slow LCD panels where ghosting would be an issue and that is another area you simply do not need to worry about when shopping for an LCD TV.


Visually, LCD buyers often enjoy the ability to choose between models with the typical non-reflective front panel and those with thin glass overlays on the front. This is quite different front plasma TVs where the gases used to create the plasma are sandwiched between two [reflective] glass panels. Depending on the style of room a plasma TV is being put into, this highly reflective front may not always work to the buyers liking.


Although there are some cons to the LCD TV category, I personally don't find these big enough to sway me away from buying one. First off is the problem of viewing angle, which is continually being improved upon as LCD technology advances. The viewing angle of an LCD display is somewhat less than their plasma and DLP counterparts. Plasma's have a viewing angle of up to 180 degrees where as LCDs tend to fall short of that at around 175 degrees (give or take a few degrees on each comparison). Since LCD displays were originally designed for a single-user experience, such as a computer monitor, they have a “sweet spot” viewing angle where all the colours and intensities are better balanced. Plasmas do not suffer from this “sweet spot” and can be viewed equally from any angle.

Another bound-to-happen issue on most LCD TVs is backlight leakage. Since the backlight on these displays is what makes the LCD panel bright enough for the picture to be visible, it must always be turned on. When an LCD panel shows black it is simply blacking out the pixels that must be black but there is still a backlight turned on behind these pixels. This often causes the blacks to not be a rich and deep black, but to be slightly lighter. Depending on the quality of the TV and your viewing angle, the blacks in your picture may sometimes be very noticeably lighter, often with a slight white hue to them from this bleeding of the backlight. Keep in mind that's often only common on cheaper TVs, and if you try out a few before buying and invest your money wisely you won't run into a problem this severe.



Plasma HDTV
A plasma TV is made up of millions of cells containing the inert gases required to illuminate the display when they are charged. Each pixel of a plasma television is divided into three “sub-pixels”, one for red, one for green and one for blue. When the gas in these sub-pixels has a charge applied to it, it turns into a luminous plasma. Through this happening in every single pixel of your TV, the right colours will be lit up to create an image. Another option you'll have in your search for a new Television is a plasma TV. Plasma televisions don't come in sizes nearly as small as their LCD counterparts, but they are just as thin as a lot of LCD TVs so they can be easily mounted on a wall as well. When it comes to buying a larger sized TV, plasma is often one of the two cheaper routes to go; with DLP being another option we'll discuss soon. Although plasma doesn't always share the same resolutions as similar sized and priced LCD panels do, most plasma TVs are capable of 1080p.


Since illumination is created by a chemical reaction at each pixel and does not rely on a backlight that is always turned on like the LCD technology, a plasma TV will have much better blacks than an LCD can achieve. This will be especially noticeable with off-axis viewing, a case where LCD's will commonly lose black intensity. When it comes to contrast ratio, black levels, and depth perception it is said that plasma has a great advantage over LCD's in normal to low room lighting conditions. When you're in a really bright room or have nearby windows then make sure you watch out for reflections off the glass front!


As plasma TV's commonly only come in 42”+ sizes, you can't expect to go out and buy a “cheap” or “small” plasma. Once you do buy that new plasma, keep in mind that a lot of people don't realize that there is a “burn-in” time. For the first 100 operational hours of the TV you should run it at a reduced contrast level because it is possible to get a permanent image “burned” into the screen. During this time you will want to make sure that all the content you watch is in full widescreen mode. Any black bars at the sides of the screen from watching 4:3 ratio video will further contribute to this burn-in. After that initial 100 hours the TV will be much less sensitive to burn-in, although not completely clear of it. For minor burn-in, there are applications out there that can be executed from a computer to try and fix it.



DLP HDTV
DLP is certainly the more technologically complex of the three major television styles. A DLP chip containing over a million small mirrors (one for each pixel) is a chip that is small enough to be held in the palm of your hand. By tilting a mirror towards a light source or away from it, the corresponding pixel's 'on' or 'off' state can be controlled. Since each mirror can be turned on and off thousands of times per second, the chip has the capabilities to keep up to creating action-intense scenes without a problem. The replaceable lamp bulb that lights up these mirrors is first filtered through a colour wheel before reflecting off the DLP chip mirrors. This colour wheel is what creates the red, green and blue colours required to create a full-colour image. The last of the three major options you'll have to choose between is a DLP TV.

The projection method used on these TV's will make them quite a bit deeper than a plasma or LCD set of the same screen size. That cuts out the option to wall-mount these guys; they must be set on a stand in order to elevate them to optimal viewing level. Having an excellent size to price ratio, these are another very popular style of TV for those wanting to go big. A DLP television will often cost less than it's identical sized plasma counterpart. As with plasma, you will only find DLP TV's on the larger size (commonly 42”+). Also similar to plasma is the absence of a backlight behind the panel of a DLP television. This will also give it far better blacks than an LCD screen would have.

Being in such an affordable price range means that you will have lots of options to choose from when buying a DLP TV, so count that as another plus. Being a continually evolving format, DLP manufacturers are starting to improve upon some issues this technology faced when it was newer. The “rainbow effect” is something you may experience on a DLP TV with a bulb backlight. Since only one colour on the internal colour wheel is shown at a time, if you pan your eyes across the image or look away and then look back quickly, some people say they can actually see the colour separation. Newer DLP designs are improving upon this by using LED backlighting with RGB LED's to essentially replace the traditional bulb and colour wheel all together. This not only cuts down on that expensive bulb cost, but also rules out the fact that the colour wheel may be subject to future failure because it is a mechanical device (and as we know, few mechanical devices will last forever). Unlike older DLP's that would achieve 1080p through a method called 'Wobulation', newer chip designs are also enhancing upon this by allowing the TV to natively produce 1080p content without some mirrors doing “double duty”.