LED & LCD Screen

Benefits of LED & LCD Televisions

LED Technology
There may not be a radical advance in technology but there are certainly many benefits to be had

The difference with this type of television is with the method of lighting that it uses to light the screen. LEDs (light emitting diodes) are used to light the display. There are inherent properties that give LEDs benefits when compared with CCFLs (cold cathode fluorescent lamps) which are used in LCD displays. Firstly LEDs are more energy efficient and use less power to produce light. They can also produce brighter light and a fuller spectrum of white light. They also have reliability benefits as their performance does not degrade like fluorescent lamps and they have a longer lifespan. LEDs are physically more compact than fluorescent lamps leading to design benefits.

Essentially an LED TV is just an ‘LED-lit’ LCD TV which may seem a bit misleading to label it as this. Due to the incorporation of LED lighting into the design of these televisions rather than fluorescent lamps, there are some very real benefits.

The colour reproduction of LED TVs is often improved because of the quality of light that LEDs produce, this leads to more natural and vivid on-screen images. It is worth noting that many LEDs are used to light the display and each LED can be individually controlled. The significance of this is that levels of blackness which were previously difficult to produce with fluorescent lamps can be attained as individual LEDS or areas of LEDs can be turned off, this has vastly improved the reproduction of blacks. Coupled with the brightness of light that can be achieved with LEDs the contrast ratios have been massive improved.

If you think the power saving benefit is insignificant then maybe you should reconsider this fact. As power consumption is improved by up to 40% and considering the usage of an average television gets over its lifetime this could add up to a considerable saving to you electricity bill (as well as being comforted in the knowledge that it does its bit in helping the environment by ultimately reducing CO2 emissions). Another financial advantage is that because LEDs are more reliable than fluorescent lamps, the lifetime of an LED TV is greatly increased.
So if you are in the market for buying a new television of less than 50 inch diagonal, LED TVs should be considered.

LCD Technology
In the screen of an LCD monitor, each pixel is produced by a tiny cell which contains a thin layer of liquid crystals. These rod-shaped molecules bend light in response to an electric current. It’s the same display technology that resides in your digital watch but more sophisticated.
LCD televisions tend to be clear. Their improved clarity means that even small LCD televisions can display high resolutions.

They also make small text easier to read. Unlike CRTs, LCD televisions have only one optimal resolution. At lower resolutions, the screen is redrawn as a smaller area or all the pixels in the image are blown-up to fill the screen. The latter solution can make images look jagged and blocky so be sure the resolution of the LCD television is the resolution you want to use.

A factor for both CRTs and LCD televisions is resolution. The number of pixels horizontally and vertically defines a monitor’s resolution in pixels or dots per inch (ppi or dpi). The greater the resolution, the more information or image you’ll be able to view at once. The average user will find a resolution of 1024×768 more than sufficient for everyday work. You can achieve this resolution on CRT monitors 17 inches and larger or LCDs 15 inches and larger. Keep in mind that CRTs can display multiple resolutions, but LCD televisions and displays are optimized at only one resolution.

LCD Monitors can come with a variety of extras. Some have built-in speakers or jacks for microphones and headphones. Other monitors have dual inputs so you can connect two computers to the same monitor. With the advent of USB (Universal Serial Bus), some monitors have USB hubs at the back, allowing you to connect more peripherals. You can also get accessories like anti-glare filters and specialized mounting stands that help minimize glare and provide a comfortable working position.

Power Conservation
To keep your utility bill down, you should look for a monitor that is Energy Star compliant. Energy Star is a program developed by the US Environmental Protection Agency (EPA) to make energy-saving office equipment like computers and monitors. An Energy Star monitor automatically goes to sleep or powers down after a period of inactivity. This feature can save 60-80% of power during idle times. All you have to do to wake up the monitor is touch the keyboard or mouse.

The majority of monitors are certified as “low emission” since they meet standards like MPR II or TCO. These guidelines were developed in Sweden (the acronyms are Swedish too) by a number of organizations to set limits for electric and magnetic field emissions. The newer TCO standards are the strictest. So if you’re concerned about emissions look for MPR II or TCO certification, not just the words “low emission.”

LCD Television Features

Viewing Angle
One of the main disadvantages of LCD televisions when compared to CRTs is their limited viewing angle. When viewing a LCD straight on it looks fine. But the screen will appear washed-out if you move your head over to the side and look at it from an extreme angle. Low-end LCDs can have viewing angles of only 100 degrees which won’t give everyone crowded round your desk a clear view. For a standard 15 inch LCD try to get a 140 degree viewing angle. Up that by 20-40 degrees when shopping for an 18 inch LCD.

The brightness of LCD television sets is another important factor. LCD monitors have several backlights that provide illumination. Brightness is measured in units called nits. The majority of LCDs produce 150-200 nits which is fine for most users. The backlights in a LCD television are good for 10 to 50 thousand hours of operation.
Since they’re fairly fragile and more likely to break, backlights usually come with only a one year warranty. This warranty is separate from the one for the screen so you might want to extend the backlight warranty to match the duration of your LCD television warranty.

LCD televisions can provide a range of options for positioning a display. The common way to view a screen is landscape mode (longer than wide). Some LCDs let you pivot the screen 90 degrees so you can view it in portrait mode (taller than wide) which is great if you’re growing tired of scrolling so often. You should also check out whether the screen can both tilt and swivel. Easy adjustment is important if you’ll be doing presentations. You can even mount some LCDs on the wall like a picture.

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