The Difference Between LCD and LED TVs
The LED TVs are LCD TVs in that they contain liquid crystal displays, the difference between the two is the way the display screen is lighted. Typical LCD models use fluorescent cathode tubes for lighting, whereas LED models use light emitting diodes. There are variances in the LED lighting design. Some are manufactured with RGB or white backlighting, and some are made with white LED lights around the periphery of the screen and contain a light diffusion panel that spreads the light across the back of the screen.
LCD TVs adjust brightness by twisting the crystals to a closed position, but this reduces the contrast ratio and the detail of the overall picture. The backlit white or RGB LED’s have local dimming that turns lights off behind dark areas. The picture produced has blacker blacks and greater contrast. The RGB backlit models, in addition, produce a wider color gamut, which provides more realistic looking color.
The edge lighted LED TVs allows manufacturers to create a thinner housing, often these TVs are less than 1 inch thick. This version is also more energy efficient than the backlit models, though both consume less power than traditional LCD sets.
The LED TVs all have picture adjustment options, but some models offer more detailed adjustment ranges than others. Certain models are manufactured with a matte finish rather than a glossy screen.
The LED TVs vary in connectivity with most having HDMI connections, including A/V, LAN and PC input, but some also feature Wi-Fi, USB, and Ethernet options. Most feature apps and widgets, which allow users to access eBay, the weather, stocks, Pandora, Netflix and Facebook. One model includes a QWERTY keyboard on the remote. Most models have a swivel base stand, but a few do not and overall the TVs are thinner than typical LCD versions.
The LED TVs produce a brighter, crisper picture, consume 20 to 30% less power and are given EPA Energy Star approval. The TVs also provide better viewing angles with less distortion. LED TVs are manufactured in sizes that range from 22” to 60” models. Due to the fact that the technology is fairly new, they are more expensive. Models run 2 to 3 times more than a conventional LCD TV.