Sunday, March 18, 2012

The UN46D6420U LED HDTV by Samsung: Bringing Great 3D TV To Your Home

By Carlton T Driver


Samsung has long been a force in the improvement of HDTV flat panel sets; it is one of the leading brands on the market. Their newest sets employ LED back-lighting technology, which eliminates the cold-cathode fluorescent lighting systems that were included in the first generation of LCD TV sets. The use of this LED technique has made it possible for them to produce sets that are thinner, and lighter than earlier sets, yet they produce significantly higher picture quality. The Samsung UN46D6420U LED 3D HDTV is a good example of this technical superiority.



One of the outstanding features of this set is its 3D capability. Samsung has adopted the Active 3D method for creating the 3D images on their HDTV sets. The key to achieving the 3D effect is to make sure that each of the two stereo images is seen only by the proper eye. This is done by one of two methods, which are termed "active" and "passive". Passive systems utilize glasses with polarized lenses that work in tandem with polarizing filters that are built in to the TV screen.

These filters polarize alternating horizontal lines in one of two different patterns. Each eye then can see only the one-half of the lines on the screen (and as a result sees an image with only half the full-screen resolution!) that correspond to the polarization of the lens over the left or right eye in the glasses that matches the screen polarization

In the case of an Active system, the glasses "actively" become opaque, then transparent, by controlling the LCDs that make up the lenses. Each eye is blocked in alternation, as the stereo frame for the right or left eye is shown on the screen. The coordination is achieved by synching the glasses with a signal transmitted from the TV set. These alternating frames are shown at the rate of 120 HZ, so that each eye sees 60 images each second. Because each eye perceives a full resolution image, there is no loss of resolution in the 3D image.

As mentioned earlier, Samsung's 3D LED Tvs employ an Active 3D system. There are two types of glassed that can be used with these sets. The first type needs batteries, the other type uses rechargeable batteries, which can be charged using any USB connection. The rechargeable glasses are very lightweight, weighing only one ounce, and will work for tens of hours with just one charge.

The Active 3D system in the UN46D6420U also makes it possible to "up-convert" regular 2D content and programming to "near 3D" appearance. This means that the 2D program, whether network broadcasts, DVDs, or home movies can be given an appearance of depth that was not otherwise present in the original material.


UN46D6420U 3D LED HDTV By Samsung: Technology Paired With High quality



The size of the screen is important when evaluating a 3D TV purchase. The recommended viewing distance, to help prevent eye strain is a minimum 3x the height of the TV screen. According to that, for a 46" diagonal screen (which has a vertical dimension of about 23"), the closest viewing distance should be about 67", or around 5.5 feet. For a 55" screen, the minimum distance would be slightly less than seven feet.

Active 3D is just the start of the long list of great features you will find in the Samsung UN46D6420U HDTV. This Samsung set is loaded with what Samsung calls their "Smart Apps" - applications that form the foundation of their "Smart TV" platform. This array of "Apps" allow you to use the TV to interface with the Internet, and to download Web content from providers like Hulu Plus, Netflix, Pandora, and many others.

Although some of the "Apps" must be purchased for a dollar or two (much like iPhone apps), there is a broad list of free Apps, such as children's material and games. Apps categories cover areas such as Videos, Sports, Games, Lifestyle, Information, and Education.

Another great feature of this UN46D6420U TV is "Allshare DLNA Technology". DLNA is an abbreviation for "Digital Living Network Alliance". It represents a technical standard that makes it possible for a variety of electronic appliances to link to each other, in order to make possible file sharing and data transmission. Samsung's "Allshare" makes it simple to synch up various DLNA-enabled devices with your Samsung TV set, which means that you can enjoy all the media files on your computer, iPhone, and other devices on your new HDTV set . Add the available LinkStick from Samsung, and you will have wireless access too.




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