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.
[I:http://autorepairarticles.com/autorepairarticles/wp-content/uploads/2012/01/CarltonTDriver13.jpg] One of the most impressive features of this set is its 3D display capability. Samsung has adopted what is termed the Active 3D method for creating the 3D pictures on their LED TV sets. The key to achieving the 3D effect is to insure that each left or right image is visible by the proper eye. This is achieved by one of two methods, which are termed “active” and “passive”. Passive systems employ glasses that have polarized lenses that work together with polarizing filters that are built into the TV screen.
These filters polarize alternating horizontal lines in one of two different polarization patterns. Each eye then can see only one of the two sets of lines on the screen (and therefore sees an image that has only half the full-screen resolution!) that match the polarization of the lens over the left or right eye in the glasses that corresponds to the screen polarization for those lines.
With an Active system, the glasses “actively” alternate between being transparent, then opaque, by activating the LCDs in the lenses. Each eye is blocked sequentially, as the stereo image for the right or left eye is displayed on the screen. The synchronization is accomplished using a bluetooth signal provided by the TV set. These alternating images are shown at the rate of 120 HZ, so that each eye will see 60 images per second. Because each eye sees a full-screen image, there is no reduction of resolution in the 3D picture.
As said previously, Samsung’s 3D sets use the Active 3D system. They have two types of glassed available. One set requires batteries, and the other type is rechargeable, using a USB connection. The rechargeable glasses are very light, weighing only one ounce, and last for many hours of use per charge.
Samsung’s Active 3D system also enables you to “up-convert” standard 2D content and programming to what is called “near 3D” appearance. This means that the 2D programming, whether network broadcasts, DVDs, or your own home movies can be displayed with the appearance of depth that isn’t otherwise present in the original material.
The dimensions of the screen and the size of the room are important factors to consider when choosing a 3D television set. The optimal seating distance, to avoid eye strain is 3x the vertical dimension of the screen. On that basis, for a 46″ screen (which is about 23 inches high), the closest distance should be about 67″, or approximately 5.5 feet. For a 55″ screen, the closest distance would be slightly less than seven feet.
The Active 3D system in this Samsung UN46D6420U LED TV is just the tip of the iceberg when listing its great technical features. This UN46D6420U Samsung set is packed with what Samsung calls “Smart Apps” – applications that form what they refer to as their “Smart TV” platform. These “Apps” allow you to use the TV to work on the Internet, and to download Web content from sites like Netflix, Hulu Plus, 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 really nice feature of this model UN46D6420U is its use of “Allshare DLNA Technology”. DLNA is an abbreviation for “Digital Living Network Alliance”. It represents what is called an “interoperability protocol” that enables different electronic devices to link together in order to make possible file sharing and data transmission between the devices. Samsung’s “Allshare” makes it simple to synch up various DLNA-enabled components with your Samsung TV set, which means that you can access all the various media files on your computer, iPhone, and other devices on your HDTV set . Add the optional LinkStick, and you will have wireless access too.
Get full details, and read lots more about the other great features of the Samsung UN46D6420U. These include The Eco Sensor, the Wide Color Enhancer Plus, and lots more. You will also find the full specs for the set. You can read lots more about other great LED TV sets here.