There is nothing called the LED TV but retailers and shopkeepers use the term, so the public sees the difference with that name. In fact, LED Televisions are just the same as LCD TV’s but the only difference being that LED TV’s use LED lights for backlighting instead of fluorescent lighting that is used for LCD TV’s.
LED TVs have two most important forms of backlighting – edge lighting and local dimming. When you find LED TVs around the edges of the panel, it means it is edge lighting and this lets extremely thin construction to take place. LED means light emitting diode and technology has advanced ahead that the manufacturing of these lights can be done in very small sizes also. Thus the local dimming light sets can have a very thin depth.
LCD Television is a liquid crystal display TV and an LCD does not produce light itself. They need a source of light to produce a visible image. Backlights are thus used to illuminate the LCD from behind the display panel. These lights are also used to increase readability in dim and low light conditions and also in computer displays.
The very simple type of LCD displays is built without using an internal source of light and so they require external light source to convey display images to the user.
Nowadays, LCD screens are made with internal light source, and these screens consist of several layers. This light is the first layer from the back side.
LED comes in two flavors. They are used in desktop screens and almost all mobile screens. A white LED gives an impression of white light. RGB LEDs consist of red, blue and a green LED and produces different temperatures of white.
LCD Televisions contain liquid crystal which is activated when current is supplied to it and it uses a normal CCFL backlight.
Another major difference between LCD Television and LED Television is that an LCD Television uses mercury in the manufacturing process whereas the LED Television does not use mercury. Mercury is not recommended for usage as it is bad for the environment and it is used to make solar cells. LED TV uses 40% less power than the same size LCD TV and this is why LCD TV is highly recommended as compared to LED TV.
LED TVs are also thinner than the LCD TVs and so the weight also of an LCD is almost half as compared to the LED TV.
An LED TV uses diodes to create a much more colorful image and a vibrant picture and so the colors in the picture are more realistic as compared to LCD TVs. LEDs achieve a contrast ratio of 500,00: 1.LEDs also have a higher refresh rate that helps in watching sports and movies.
The LED backlighting is much greener and thus more environmental-friendly than the LCD types. The mercury is poisonous and LCD needs circuits called invertors to light them. All mobile phones have LED backlights.
