HDTV televisions are large, flat-screen televisions that are selling very well around the world. With the advancements that have been made to create flatter, thinner TV displays its no surprise that most consumers are making the switch from older generation TV sets to HD TVs.
Some advancements that have been incorporated into today’s HDTVs include a different screen display system available in several types of technologies used including plasma, LCD CCFL backlighting and LED-backlit LCD HD TVs. LED TVs in particular are receiving a lot of marketing attention because of their thinner display requirements as well the brighter, sometimes more detailed image quality. LED TVs use different backlighting technologies, although they are the same LED (light-emitting diode) backlighting technologies include edge-lit LED and full-array backlighting. Although both backlighting technologies are used by many manufacturers, the real advancements are being made with edge-lit LED which is also the leading type of LED HD TVs available. Edge-lit LED relies on four LED backlights that are placed in the four main corners of the LED display. Full array LED backlit HD TVs have more LEDs in that cover the entire back panel of the HD TV.
This means that LED technology is improving. It can be hard to judge the major improvements but with edge-lit backlighting growing as the leading LED technology. Edge-lit LED technology is being used more because it allows HDTVs to be made thinner than before and reduces the weight significantly.
One of the concerning with full-array backlighting (local dimming) is that it requires more LEDs to work efficiently while edge-lit requires only 4 main LED lights. To perfect full-array LED would require a total 2.1 million LEDs to individually light 2.1 million pixels. Including that number of LEDs to an LED TV would require a lot of money and this will make such as LED TV more expensive. LED TVs are already some of the most expensive HD TVs available today.
Compared to standard CCFL backlighting and edge-lit LED backlighting, the entire backlight adjusts once instead of individually lighting such as that which is used on full-array HD TVs. This technology is sometimes referred to as “precision dimming” to differentiate it from full-array backlighting. Precision dimming will allow edge-lit HDTVs to adjust the LED lighting in a way that is similar to full-array only using less LED backlights.
As manufacturers seek to create thinner HD TVs, it is likely that edge-lit technology will be used to power this advancement and this in turn will make LED TVs more affordable than before.
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