White LED TVs are lit very similar to CCFL (Cold Cathode Fluorescent Lamps), which is an element that is not independently heated, and is used in some gas discharge lamps, discharge tubes and vacuum tubes. Deciding if a White LED TV is best for you takes some research into what White LED lighting actually is.
History of White LED Screen
White LEDs are used most often in notebook and desktop screens, as well as virtually all mobile LCD screens. A white LED is actually a blue LED with yellow phosphor (sulfur) coating to provide the impression of white light. The past few years have seen many advances and upgrades to the white LEDs so they are now able to be used on the larger screened LED televisions.
Description of White LEDs`
Some of the photons emerging from the blue LED excite the yellow phosphor, which produces yellow photons, and then combine with the blue photons to produce white light. By fine tuning the blue LEDs’ color and phosphor formulation, LED makers are able to deliver white light pure enough to drive high quality video image. This makes an even broader spectrum, producing a wider range of colors.
White LED TV Benefits
White LED benefits include being more efficient in boosting image quality, typically cost less than those with RGB LEDs due to lower manufacturing costs, a simpler backlight control system, balance that fluctuates more easily, and it enhances picture speed so scenes appear smoother. This has caused white LED backlighting to become more common in larger screens.
White LED TVs Cost Less
A white LED driver was designed to use on larger LCD panels with an LED backlight source. It communicates with up to eight external converters to drive up to 4 individual strings of multiple series connected LEDs. This part reduces the LED TV cost by approximately $10 - $15 per television, making it easier for the manufacturers to achieve Energy Star 5.0 requirements by reducing power consumption 5 – 10 W per TV.
Manufacturers Using White LED TV Technology
There are several manufacturers that are currently using the white LED television technology, and many others that are currently experimenting with it. Samsung UA40B7100 uses white LEDs, and Sharp has released a new line of white LED technology which are available in a variety of sizes ranging from 32” – 52”. Sharp’s new line is called the LE700 Aquos series, replacing their expensive XS1 series which used RGB LEDs.
Sharp Japan’s New Series
Sharp Japan recently announced their LX series of LED televisions which will be available in 40”, 42”, 52” and 60” sizes. According to Sharp Japan, their LED panels sport a full HD resolution of 1920 x 1080 pixels, have a contrast ration of 200,000:1, and a 176 degree viewing angle. Their white LED backlighting consumes 30% less power than its competitors. Sharp America is expected to follow soon.
Traditional White LED technology produces color by using a single LED to light each pixel of the image and it doesn’t really show any difference in the resolution. White LED TVs are less expensive while not sacrificing in their picture quality, making them a great choice for consumers.