Buying 3D TV for Sale
Approximately, 5 and half hours is the average daily length of time that a television in a Western home remains switched on! If the TV remains important in everyday life, the arrival of computers and the Internet has forced changes to the small screen:
The CRT has given way to substitute lighter and thinner TVs and computer technologies such as network or USB and Scarts are now part of the modern TV build.
One thing has not changed: Buying a television is not always simple.
Today, we must understand the differences between TV and HD TV HD TV 1080p, the differences between TVs Plasma and LCD, and what to look for in 3D TVs. So lets have a look at the common factors associated with the modern TV.
HD TV, 1080p HDTV
After the vagueness of early, acronyms found on cartons of televisions we now have a better understanding of the various TV definitions.
The acronym HDTV is for describing TVs supporting 720p resolution televisions (in fact with a resolution of 1366 x 768) while 1080p HD TV on the TV indicates that the TV supports 1080p (with a resolution of 1920 x 1080, the highest resolution currently available for television).
These symbols also require the presence of an HD tuner, knowing that it is obligatory on televisions with a diagonal size of at least 66cm (26 inches).
Which TV size?
Manufacturers can indicate the size of their TVs in centimeters and inches and here are some conversions to get a quick idea of a TV size:
An inch is 2.54 cm, 32 "is 82 cm, 40" is 102 cm and 52 "is 132 cm.
With these orders of magnitude, you can easily get an idea from your old television.
With a CRT television, it was advisable to have a distance equal to four times the diagonal from the screen itself.
The improved resolution of HD televisions have reduced the setback distance:
It is possible, in the same room to have a larger TV without loss of comfort, provided you use HD sources.
It is not always easy to know the resolution of all available sources.
HD TV can only work best with a resolution identical to the resolution source (1920 x 1080 in the case of a television HDTV 1366 x 1080 and 768 for HD TV) TV
For all other sources, it will resize. We're talking about upscaling to increase the resolution of the source (for example, display a DVD on a HDTV TV 1080) and downscaling (for example: viewing a Blu-Ray offering 1080p HD TV on a TV that offers only 720p). All manufacturers include a scaler to handle this type of operation:
How do resolutions compare?
At the bottom of the resolutions you find SD (Standard Definition) sources - for sources such as DVD, DTT and also a gaming consoles like the Wii.
HD - High Definition - is divided into several categories:
- The 720p is used by the majority of PlayStation 3 games and part of HD DTT channels.
- The 1080i is used by the XBox 360 and the other HDTV channels.
- The 1080p is used by the Blu-Ray, the successor of DVD.
In the medium term, the HD will prevail - whether via TNT, TV or. For diagonal sizes above 82cm, even if you have mostly SD sources, it is advisable to buy a 1080p HDTV
Plasma or LCD?
In the grand tradition of modern technology, both of these technologies currently share the market and differ in their operations..
The plasma is supported by fewer and fewer manufacturers: Panasonic, Samung and LG are the last to manufacture these TVs.
Most people, however, still believe in this technology and the help of former engineers from Pioneer are continuing to improve:. Its range of Neo PDP screens seek to both enhance the strengths of plasma while leveling out the weaknesses (especially its high consumption). The operation of the plasma is fairly simple to understand:
Each pixel of the image is composed of three gas cells - one for each color. Using an array of electrodes, the gas will emit ultraviolet radiation - invisible to the human eye – which is transformed into visible (and colorful) light through the coating of each cell.
The plasma is characterized by its fast reaction time, excellent color reproduction - especially the dark (hence the Pioneer TVs name of Kuro meaning black in Japanese) and wide viewing angles.
Plasma can also produce large screens at discounted prices. Despite improvements builders, the plasma still sometimes suffers from shorter and variable life: More brighter images, will make the television “work harder”. Similarly, if you live in the mountains, the life of the TV may decrease because of changes in gas pressure.
You require a number of stacked layers to make an LCD panel.
The make of an LCD TV requires slabs of glass, polarizing filters, color filters and some other elements arranged around the LCD. There may also be backlight system to allow the liquid crystals to emit color.
This complexity means that LCD panels will be long confined to small and medium-diagonals:
Manufacturers have up to now lacked the capacity to produce large screen sizes.
In general, LCD TV stand out for their higher life expectancy than of plasma screens, with their insensitivity giving the LCD TVs better ability to function in bright light (the Plasma prefer darker surroundings). However, the LCD TVs suffer from smaller viewing angles and color rendering is generally worse (especially black for color).
Neon: A controlled technology and cheap
Neon is the first backlight technology that manufacturers have used: A network of neon is arranged behind the screen. This technology is present in the TV input and offered on midrange TVs: It is simple to implement and is less expensive than LED TVs. Its main weaknesses are its color rendition - generally lower than other technologies - as well as the relatively larger thickness of television-between 10 and 15 cm.
LEDs: The Future for LCD TV?
The LED TVs are actually LCD TVs that have replaced their neon backlight with LEDs. LEDs are generally more energy efficient and allow for better quality pictures. Manufacturers have two ways to position these LEDs - behind or on the edges of the LCD panel.
Direct LED TV
This category includes all screens with LED positioned behind the screen. It provides the best image quality - especially for screens using LED RGB, a relatively expensive solution - with a good light uniformity, good color rendering, and Local Dimming. Local dimming allows the tiles to vary the LED intensity by area and improve contrast of images: The dark areas are dimly lit in contrast to the bright areas.
LED Edge TV integrates LEDs into the edges. The quality of images produced is superior to conventional LCD TV, but less than the Direct TV LED:
It is not possible to take advantage of the Local Dimming with Edge LED TV and the available LEDs can cause some problems of homogeneity of light.
What TV connection?
For HD sources, the HDMI interface is standard. HDMI is currently at version 1.3, while version 1.4 is expected to debut on compatible 3D hardware.
Depending on what you want to plug into your TV, you should verify that it has SCART inputs (for VHS VCR, a video game console like the Wii) and check for a component input (also called YUV).
To connect a computer (not necessarily recommend for a Plasma screen) the VGA is the most common way to do so, while some graphics cards now have HDMI output.
You can use the computer's USB port to view pictures or play music directly from a USB key. The Ethernet port allows the same thing, but reading the files directly from your computer. This Ethernet port can also take advantage of online services vendors, such as Internet access, a weather channel or posting on YouTube! / DailyMotion directly on television.
The spirit of manufacturers is already facing the transition of TVs from standard HDTVs to 3D. By 2014, some manufacturers estimate that several million 3D compatible televisions will be sold. So should we wait until then or start digging deeper into our pockets to buy the early 3D TV models? Good question; here are some things to consider when buying a 3D TV.
Many foreign broadcasters have already started broadcasting content in 3D. This started with the broadcast of some sporting events (with World Cup Soccer in 2010). However, more recently, TV channels are increasing their 3D content supply to satisfy the 3D demand. Broadcasters from around the world are working on increasing their 3D content output.
In addition, Blu-ray has started replacing the DVD in stores with 3D films. This development will require the purchase of a compatible unit, which will be able to play all Blu-ray (and DVD) that already exist:
The good news is that Blu-ray 3D is independent of the various technologies used in televisions
To take advantage of 3D, a film must be provided in 3D (like James Cameron's famous Avatar).
With or without 3D TV glasses?
To make a 3D image, manufacturers "simply" use the natural functioning of our brains and our eyes:
Each eye receives a slightly delayed effect of the other's eye, and that by combining these two images that the brain is able to perceive the distances of the world around us. For a 3D movie exactly the same approach is used:
The 3D camera will be filming a 3D scene from two slightly different viewpoints.
In the near future, the only affordable technology that will be mature enough will be 3D TVs that require the use of glasses. There are two types of such 3D TVs: The first will use active shuuetrs, which incorporate two LCD "screens" (one for each eye). These screens show an image that turns black to hide the image for the other eye. In some people, it can cause severe fatigue, but it offers the best quality. The second approach is to use passive spectacles, comprising of two polarizing filters. Each filter prevents one eye to see the image for the other eye. This technology is a bit more complex to implement for the TV display and the quality is inferior.
For the consumer, manufacturers have chosen the active glasses: one pair should be included with every TV. To enjoy the experience you will need to equip each family member with a pair of 3D TV glasses, otherwise without them, the picture is cloudy and blurred. The cost of a pair may run quite high and at the moment, they are specific to each manufacturer. So if your friends have a Samsung 3D TV, they can not bring their glasses to watch a 3D Blu-Ray on your Panasonic 3D TV.