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Speaking of TV today is rather arduous task for anyone because of the enormous technological developments we have witnessed and continue to witness in recent years. For this reason does not want to offer these articles devoted to televisions going into the detailed description of the hundreds of technical features (often only marginally affect users (such as the response time in ms or the concept of luminance), but it is our intention to respond to common questions that the average user can ask. Navigating a bit 'on the internet we noticed that there is often much confusion in the answers: will offer some' clarity.

A bit 'of history

We have mentioned the great technological changes that characterized the televisions in the past, if there is a time when the change was more clear-cut, well, that time is marked by the transition from traditional TV sets with cathode ray tube (CRT televisions these) to plasma televisions and LCD (liquid crystal display). We'll talk about these technologies in more detail in future articles but for now we need to know that this change has significantly changed the overall concepts of a television, distance from them and proportions of the screens. These are the most important issues we analyze in this article.

Before the advent of these technologies, the world of CRT televisions had initially proposed a major revolution represented by the color (remember the first televisions were all in black and white, and the advent of color television was welcomed as a breath of freshness!) and the remote, and then lie down for several years about changes less important, such as reducing the size of the cathode ray tube (substantially decreased the depth of the TV) and the introduction of flat screen (at the expense of the old screen " convex). It was only after this last change that finally came time to turn the page, leaving the CRT and plasma, and dedicate ourselves to the lcd. The first two things that jumped in the eyes of all were the proportions of the screen and the size of televisions.

TV Screen Size

The first thing that catches your eye by comparing a modern TV with an older generation has completely changed the proportion of the sides of the TV screen, while in the old television sets, in fact, it was possible to notice an almost square screen (4:3 aspect ratio were - four thirds - that is, for example, a base of 40 cm and a height of 30), we see in modern television that the base is significantly greater than height (16:9 aspect ratio are now - sixteen noni, ie, For example, a base of 160 cm and a height of 90), offering a cinematic vision of our television programs. This information will not be enough to choose the right size to put televisions in the lounge or in the bedroom of our house: indeed, the screen sizes are in inches (whose symbol is "), English measure, which indicates the length of diagonal screen. 1pollice Considering that is equal to 2.54 cm (1 "= 2.54 cm), we see one by one the approximate dimensions of width and height of the TV in 16:9, these measures need to add any thickness the frame of the TV (say, because there are few if any TV sets, like TVs and LG SL8000 SL9000 Boderless, "without borders").

Here is a summary diagram of the monitor size:

Dimensions and distance TV

The other thing that immediately strikes the eye is the reduced size of modern plasma and LCD TVs in terms of thickness. In fact, thanks to the disappearance of the cathode ray tube, television producers have been able to create ultra-thin design objects, which you can also hang on the walls of our house. If there is still a very significant aspect that often escapes to new purchasers of television sets is the distance that must exist between the eye of the viewer and the TV screen, especially as regards the new full HD TVs. First we clarify the difference between "full HD" and "HD ready" these acronyms identify how many pixels are placed vertically on our TV. Although it is not possible to clearly see the pixels with the naked eye, we need to know that the greater the number of pixels, the image is sharp. Well, the full HD TVs have 1080 pixels on the vertical side, while the HD-ready TVs have only 720. From this one can easily imagine how the full HD televisions showing images clearer, sharper, or better, sharper.

Clarified this one has to understand that to fully enjoy a movie or a program in full HD the distance that must exist between the eye of the viewer and the TV screen is much lower than we were used with CRT televisions. If a couple of meters was enough screen 28 "CRT television sets, a modern concept for a TV is oppurtuno to opt for a screen size of 37 or 40 inches. The reason behind this change is attributable to that concept we introduced a few lines above by saying that the format has a 16:9 cinematic approach. Well, as we look at the film fails to envelop the entire screen (and this choice is not random, but the express purpose of "immerse" the viewer into the film they are watching, forgetting what he has around), so watching a modern full HD TV the eye should not, in theory, even see the frame of the TV, but immerse themselves in the succession of images. The 16:9 aspect ratio coupled with very high resolution allows this, and today we create for ourselves even a small cinema in the living room of our house.

Let's see the recommended distance between the eye and the screen for each screen size in full HD and HD ready CRT (all data were obtained through mathematical formulas official):

Using these data offer will not convince anyone in the accuracy of the formulas to get the right distance, but we realized that there is a lot of bad information (mainly due to the old habit televosori crt) in the choice of full HD TV. We often complain that the image appears too small or far away. The reason is related to the high resolution of modern television.

Buy and offers televisions

After advancing on the main characteristics of modern TV sets, we have to give some advice on the purchase of televisions, any model or type you are choosing. Let's say you have general advice on the purchase, while more specific advice for each type of TV (they are led, lcd, plasma, or OLED 3D) you can find in our pages specifically dedicated to them.

If you're about to buy a television, first read this article carefully to understand what measures should be of interest to TV. Without this, visit the websites of the most popular brands of TV, here is a quick list: TV Samsung , Sony (with its Bravia), LG , Inno Hit, Toshiba televisions, Sharp (with its Aquos), Amstrad, Loewe, Mivar and Panasonic televisions. All the best brands offer excellent build quality and image, the choice is based on design and price. With regard to the cost of televisions suggest, as always, do not underestimate the web resources: finding interesting TV offerings of every make and model is not uncommon, often at prices unbeatable. Even large retail chains often offer promotions that only last a few days, so always consult the flyers they distribute the same in our cities. Good buy, so e. .. that is on offer!