LED Moniters
The latest marketing innovation to hit TV's and monitors is the term LED. This is being marketed as a new type of screen to supersede the Plasma and the LCD (Liquid Crystal Display). LED means Light Emitting Diode and relates to the way the display is illuminated. LED monitors still use the same Liquid Crystals as the previous LCD displays. The way the backlight works however with the LED's will lead to a number of improvements in the display as we will discover in this article.Types of LED backlighting
The LED monitor is a new way of lighting a monitor display but there is more than one method being used with relative advantages and disadvantages to them. The three types we will be looking at are W-LED (White-LED), Edge LED, and RGB LED. We are going to start with the Edge LED.
Edge LED monitors
This is the most common method for backlighting in the LED model. Edge LED monitors have diodes placed all around the edge of the screen to light up the display. This is by far the cheapest method and still comes up with some good results. This technology is primarily used in computer monitors. In this model all the diodes produce white light and are laid out as data.
While it may look like this will give the edges of the screen more light than the center of the screen, a little piece of tech called a Light Guide Plate equalizes all the light around the display giving it an equal brightness balance across the entire display. Since the launch of the Edge LED monitors, manufacturers have perfected the technology to the point where they only need to have LED's on a single edge of the screen. This dramatically reduces the production costs of the displays, making LED monitors even more affordable. LED's have now become the mainstream tech for computer monitors because they are now affordable to the masses.
Direct LED Monitors
Direct LED monitors use LED directly behind the liquid crystal display (LCD) in order to light up the screen. This technique is very effective and gives each area of the screen its own diode, which can be on or off. Still using white light, the direct LED screens can produce massive contrast ratio's making the difference between the lights and the blacks appear almost perfect. The problem with the Edge LED's is that some of the deepest blacks can appear a little grey. So Direct LED's are the better option then? Yes however this technology is expensive and also leads to screen being deeper and heavier than the Edge LED counterparts, something the industry is trying to get away from.
Direct LED screen are only found in high end HDTV's at the moment due the cost of manufacturing. But they are the way to go if you can afford them. Its unlikely that the sales person at your local electronics store is going to know what type the TV is so its always worth searching on the net before you make a purchase to see what your really getting for your money. These types of screen may also be referred to as WLED (White LED). Check out the video below on Edge vs. Direct LED's
RGB LED monitors work in much the same way as the Direct LED screen only that in these panels the LED's are capable of emitting not white light but RGB (Red, Green, Blue). Because the diodes can produce these colours the actual onscreen colours are much more accurate and also they have a much broader range of colours available. The downside to this method is none other than our good old friend, price. The cost of these panels prices most of the market out of these types of screens. On average you are looking at £2000+ for a TV with RGB LED technology. RGB LED's are also heavier and have more panel depth than the other two.
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COMPUTER AND THEIR PARTS,
TECH PLANET
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