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What Is The Difference Between HDTV And LED TV?

By Paul Malcolm

Republish: EasyPublish™ Published: 27Feb2012 Word count: 525 Viewed: 25 time(s) Get Free Content For Your Site

Light emitting diodes (LED's) are now being used in the manufacture of flat screen televisions that have liquid crystal displays (LCD's). Prior to the LED technology, LCD screens were lit by fluorescent tubes, which don't produce very sharp blacks; by adding LED's either at the back of the screen or around the perimeter, the contrast is increased. The cost of back-lit LED-LCD TV's is higher, as more LED's are used. The LED's around the perimeter illuminate the screen from the sides, offering a less expensive option. So, the choices are back-lit LED or perimeter LED TV.

HDTV is high definition television. The standard for high definition is 780p, and 1080p is used for full high definition. The numbers indicate how many lines of information cover the screen; the higher number, the richer the picture. Standard HD TV with LCD screens and 780p refresh are at a slower rate than LED TV so there will be more blur as the picture changes. A television with full HD, or 1080p, will refresh at a higher rate, giving a crisper picture.

Full HD is only available if you have a television that can receive 1080p; it can be plasma, LCD, or LED. You must also have a full HD signal coming in, either through a cable receiver, or full HD video player. These must connect with the right cables; HDMI or video composite cables. Be aware that even if you have a full HD TV, and LED backlit or perimeter screen, most stations still broadcast in 720p, so the picture you see will not be full HD. Many home video cameras are now 1080p, as well as cameras integrated into phones and tablets. Many rental videos are also available in full HD.

The older technology used for high definition televisions was plasma screens. These used gasses to produce the image; the drawback is that over time, the colors faded, and the picture would never be as bright and sharp as when new. These have been largely replaced by LCD and LED/LCD screens. Another technology for HDTV is digital light processing (DLP). This was first used when home theater television demanded very large screens; DLP televisions were large and heavy. TV advancements have allowed these screens to be much thinner and lighter, and the contrast and sharpness is still far superior to LCD screens. However, they are comparable in quality to LED/LCD televisions.

There are many choices out there. Remember, if you want full HDTV, a device which will receive the 1080p signal is necessary. The technology of the screen is also important. LCD is the basic, perfectly acceptable for most viewing. LCD with LED backlit or perimeter is superior, because the LED's produce a crisper image than the fluorescent light of the LCD. DLP is comparable in crispness to an LCD with LED, and plasma fades. HD standards are 780p, and for full HD, the standard is 1080p, meaning that the refresh rate is more rapid, and the sharpness will be enhanced. Overall, your choice will depend on your TV preference and needs.

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