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Samsung UN40D6400 3D LED HDTV – A Great Choice For Smaller Rooms



When it comes to flat panel HDTV sets, Samsung is almost certainly the Industry leader. It has been the top sales manufacturer of flat screen TVs for some years. As of early 2011, Samsung had sold 30% more flat panel TVs than its closest rival. Anyone who has seen a Samsung HDTV set in operation will not be terribly surprised at that fact.

The pictures their sets produce are very stunning in their clarity and sharpness. Add to that the high level of technical sophistication and the wide range of features that Samsung packs into its sets, and you have a very compelling package for anyone contemplating the purchase of one of these sets….and that’s before you even consider the Active 3D aspect! The Samsung UN40D6400 is another in their broad lineup of excellent HDTV sets.

Samsung has adopted what is termed “Active 3D” for their line of HDTV sets. This is one of two approaches to creating 3D television images that are currently on the market. The other approach to the 3D problem is termed “Passive 3D”. There is a significant difference between the two, and it shows up in the perceived quality of the images that are displayed.

The ability to create an image on a screen that has the appearance of depth – what is commonly called 3D – relies on the stereoscopic visual effect that results from viewing a different image with each eye. To understand how this works, try this simple experiment. Hold up an object (or just your finger) at arm’s length, and observe it with just the right eye, and then with only your left eye. As you do this, take note of the apparent position of that object when compared to objects that are further away.

You will notice that when looking through your right eye, the object will appear to be to the left of certain objects in the background, but when looking through your left eye, the apparent position of the object will seem to have shifted to the right, relative to that same background object. This illusion is referred to as “parallax”, and it is the basic principle of the two systems used to create the 3D effect on a television or movie screen.

The key difference between the two systems, the Active system and the Passive system, is in the way the two stereoscopic images are presented to the appropriate eyes. A three-dimensional effect will only occur if each eye sees only the correct image. (Think back to your old View-Master). As you may have experienced, if you look at a 3D movie or TV image without the proper glasses, all you see is a double image. The 3D effect requires that your brain sees a distinctly different image from each eye, and that the images have the proper parallax.

The Passive system for creating 3D images uses glasses with polarizing filters that are set at 90 degrees relative to each other. The image on the screen is also passed through polarizing filters, with alternating scan lines being polarized in the two different directions. This means that for an HDTV picture, with 1080 horizontal lines per frame, that 540 lines are polarized in one direction to create the image seen by the right eye, and the other 540 alternating lines are polarized in the 90 degree direction, for the left eye. The result of this is that you see an image which has an effective resolution of 540 lines, just half of what is required for true HDTV, which is 1080 lines.

With an Active system, the image for each eye is presented on the screen alternately, first for the right eye, and then for the left eye. These alternating frames appear at a rate of at least 120 frames per second. Obviously, if these alternating images were observed without some kind of filtration to insure that the proper image was seen only by the correct eye, the result would again be a double image. To make sure that each eye sees only the correct image, an Active system employs glasses with LCD filters. These filters can be made clear, or opaque, by switching the LCD filters on, or off.

These glasses use a Bluetooth signal from the TV set to coordinate the switching of the lens filters with the display of the images on the screen. Because the image for each eye uses all the lines on the screen, there is no loss of resolution in the image – each eye sees the full 1080 line image, just half the time.

The Samsung UN40D6400, like all Samsung 3D HDTV sets, uses the Active system. In addition to great 3D TV, this set has a wide array of other great features that will make it your complete media center. It’s screen uses LED edge lighting to provide the illumination for the picture (since LCD’s do not produce any light). This system replaces the fluorescent tubes (yes, really!) that were used in previous generations of LCD flat screen TV sets.

Samsung has a complete array of Smart Apps that run on their TVs. These Apps are small programs (much like iPhone Apps) that run on the TV set. Although some of them must be purchased for what amounts to pocket change, there are quite a few free Apps. These cover a wide range of subject areas such as Lifestyle, Videos, Sports, Education, Games, and Information. There are also Apps that enable you to access the Internet, and to use services like Hulu Plus, Netflix, Pandora, and many others.

The Samsung UN40D6400 set also has a feature called the “ConnectShare” Movie feature. This makes it possible for you to listen to music, run videos, or browse pictures from your USB Thumb Drive. Just insert the drive in the USB port that’s provided on the TV, and you are ready to enjoy your media files.

Aside from all the electronic features, Samsung has also taken into consideration minimizing the impact of the room environment around the TV screen. They feature the “Ultra Clear Panel” on the front of their screens. This panel has a specially treated surface that absorbs light from the room. This greatly eliminates those annoying reflections that might otherwise be present on the screen, and that would interfere with your enjoyment of those incredibly sharp pictures.


About the Author

Tom AbellPut simply, Tom loves technology! Having been involved in the IT world since leaving the US Navy Submarine Force in 1992, Tom has moved his way up to the top as an IT Systems Engineering. But having spent some time in the Home Automation industry early in his career, he’s never been able to shake his love for creating integrated Home Technology environments and has been running HTPCs and Windows Home Servers for years. With 17 years of IT Systems Engineering experience, Tom's recent OIF 08-09 deployment has rekindled his love for the Connected Home Industry and hence, the website. We hope you like the site, please share it with your friends and follow us on your favorite Social Networks! Read more about Tom on the "About Us" page.View all posts by Tom Abell

  1. Jay Lo
    Jay Lo03-23-2012

    Great info! I have always enjoyed Samsungs TV’s and they provide a great picture as well as awesome performance. Having the right recipe for HD means you need an HD TV that rocks as well has a great HD selection. There is nothing like getting access to great movies and TV shows in HD. DISH has a great selection of HD channels which outranks the competition. I get all this as well as having the HD free for life. This is a great way to enjoy the most shows or movies. DISH allows you to get maximum return for your money. Glad my coworker from DISH told me about this awesome package.

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