Samsung UN40D6420UFXZA LED 3D HDTV Set, A Top Performer

Samsung has been a leader in the development of flat panel HDTV sets; it is one of the top brands available. Their newest sets feature LED back-lighting technology, replacing the cold-cathode fluorescent tube systems that were used by the first generation of LCD TV sets. The use of this LED technology has enabled them to produce sets that are thinner, and lighter than earlier sets, yet produce substantially better picture quality. The Samsung UN40D6420UFXZA LED 3D HDTV is a good example of this technical excellence.

Because an LCD (Liquid Crystal Display) does not produce any light, but rather acts as a shutter that controls the passage of light through the display, all LCD displays require a back-light in order to be seen in dim lighting conditions. The LCD part of the display simply acts as a “shutter” that either allows light to pass through the display panel, or blocks it. It is like a microscopic venetian blind: when the crystals in a display cell are aligned in a perpendicular direction relative to the screen, light can pass through. When the crystals are aligned parallel to the display, the passage of light is blocked.

Thus, while an LCD display can be seen in bright lighting conditions (a digital watch or clock face, for example), to be seen in dim lighting conditions – or to produce a useful TV picture – there must be a light source behind the LCD display screen that provides the necessary illumination, a back-lighting system. The first generation of LCD TV sets were back-lighted by a series of cold-cathode fluorescent tubes, which produce a white light. Each “pixel” or “picture element” that makes up a TV picture is spot on the display with three microscopic filters that produce the primary TV colors: red, green, and blue (RGB).

The color TV picture is then created by adjusting the transparency of the LCD element that controls the light passing through each of the filters in each of the pixels that make up the entire picture. For a typical HDTV picture, there are 1080 lines of pixels, each with 1920 pixels per line – a total of over 2 million pixels in the picture. Each pixel has three filters, and must be controlled individually to create a single frame of a TV picture, which refreshes at a rate of either 120 Hz, or 240 Hz, depending on the model. The notation Hz refers to “Hertz”, which is a measure of the number of “cycles per second” – 1 Hz is equal to 1 cycle per second.

The Samsung UN40D6420UFXZA LED 3D HDTV set uses an “edge lighting” system to provide the back-light for its picture. In this system, very bright white-light LEDs (Light Emitting Diodes) are placed around the edge of the screen frame. A diffuser plate then distributes this light through the entire face of the display. The use of an LED lighting system means that the TV requires much less energy to operate. This set is extremely efficient: based on a usage rate of five hours per day, and an electricity rate of $0.11 per Kwh, it would cost about $14/year to operate this set. When the set is turned off, it consumes just 0.07 Watts of power. That amounts to 0.6 Kwh/yr, which would cost less than $0.07 based on the same electric rates – no “electricity vampire” here!

This Samsung UN40D6420UFXZA set is loaded with what Samsung calls “Smart Apps” – applications that form the basis of their “Smart TV” platform. These “Apps” allow you to use the TV to interface with the internet, and download Web content from providers like Netflix, Hulu Plus, Pandora, and many others.

Another feature of this set is its use of “Allshare DLNA Technology”. DLNA stands for “Digital Living Network Alliance”. It represents an “interoperability protocol” that makes it possible for various electronic devices to link together to enable file sharing and data transmission. Samsung’s “Allshare” makes it easy to synch up most of your DLNA-enabled devices with your Samsung TV set, which means that you can use all the media files on your computer, iPhone, and other devices on your HDTV set as well. Add the optional LinkStick, and you can have wireless access as well.

The Samsung UN40D6420UFXZA set also includes the ConnectShare Movie feature. This makes it possible to play music, watch videos, or look at pictures from any USB Flash Drive. All you need is to is to plug the drive into the USB port on the set, and you are ready to go.

The clarity of the picture you will see on the Samsung UN40D6420UFXZA is enhanced by the Ultra Clear Panel which forms the front of the screen. This panel absorbs ambient light from the surroundings, which in turn almost totally eliminates the annoying reflections that would otherwise appear on the screen. This in turn provides a picture with deeper blacks and enhanced contrast, providing a cleaner, crisper image with great shadow detail.

Owning this set will significantly enhance your TV watching experience, as well as making it easy to interface with all your other media needs, including your computer, your other personal devices, and the Internet. Check out all the details about the Samsung UN40D6420UFXZA 3D LED HDTV by following the link in the Resource Box, and see how well this set will work for you.

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