The advantages of LED TV technology
Since 2009 more and more LED backlight televisions hit the shelves, often more expensive than normal LCD televisions. While this new backlight technology offers several advantages, there is still room for improvements.
LED TVs are a piece of the LCD TV family from the technical viewpoint. The screen of a LED television is a liquid crystal display similar other LCD TVs. The main difference between the two is the different backlighting techniques which change the picture quality characteristics alot.
While normal LCD TVs use so called cold cathode fluorescent lamps (CCFL) for the backlights, LED TVs use light-emitting diodes instead. The result of using LEDs is a greater dynamic contrast, which means darker blacks and whiter whites. Especially black very often looks like a dark grey on regular LCD TVs. Since LEDs are very tiny this leads, im most cases, to a slimmer television as well. They are also saving alot of energy compared to CCFLs and often stay below the Energy Star seal requirements, which positively influences your utility bill as well. There is less pollution when recycling them, too.
LEDs have slight disadvantages as well, depending on the dimming method. While top of the line TVs tend to use the new precision dimming technique often referred to as local dimming, older models are edge-lit only. Still better than the CCFLs, but the illumination created this way isn’t absolutely homogeneous.
Sam Stark is a technology blogger and big TV fan from Miami and expert on TV Reviews as well as new 3D TV technologies.
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