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| LED TVs - How Does an LED TV Work |
In the world of full HD TVs a newcomer has entered the ring, the LED high definition television is the hot topic and this has been reflected in the sales of LED TVs over the last 12 months.
Firstly it must be said that the term 'LED TV' is perhaps not the best description for this type of television. A more accurate name would be LED-lit LCD TV and as this name suggests, LED TVs are still LCD televisions that use LEDs to light the display. Previously conventional LCD televisions used cold cathode fluorescent lamps (CCFLs) to provide the light that makes the LCD images visible to the viewer.
LEDs are being used rather than fluorescent lamps because of the improvements that can be made due their characteristics. These benefits include improved color gamut, higher contrast ratios, slimmer designs and better energy efficiency.
Firstly improved color gamut (or the range of colors that are possible) is made possible by the use of RGB LEDs in back-lit LED TVs. RGB LEDs are capable of producing a more complete spectrum of white light than fluorescent lights can. This 'whiter' light means that a wider range of color is produced when used to light an LCD panel, which ultimately makes for a better viewing experience. It is worth noting that LEDs are also used in edge-lit televisions, but these are usually white LEDs which have comparable qualities to fluorescent lamps are so produce a similar quality of picture.
The improved contrast levels are also applicable to rear-lit LED TVs rather than edge-lit LED TVs. This is because the many individual LEDs which are situated behind the LDC panel can be switched on of off in different areas to provide dark and light at the same time (as opposed to edge-lit which is either all on or all off).
With relation to size - the use of LEDs allows for the design of super slim televisions especially when used in the design of edge-lit TVs, this is because compared to fluorescent lamps, LEDs are much smaller and can be place round the edges of the LCD panel rather than to the rear.
The final benefit to LEDs is that they are more efficient than CCFLs reducing the power consumption by up to 40%. For a 60 inch LED TV that is used for 8 hours per day, this improvement can save up to $50 from your electricity bills over a year as well as making a contribution towards reducing carbon emissions.
Description: LED TVs - How Does an LED TV Work ?
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Firstly it must be said that the term 'LED TV' is perhaps not the best description for this type of television. A more accurate name would be LED-lit LCD TV and as this name suggests, LED TVs are still LCD televisions that use LEDs to light the display. Previously conventional LCD televisions used cold cathode fluorescent lamps (CCFLs) to provide the light that makes the LCD images visible to the viewer.
LEDs are being used rather than fluorescent lamps because of the improvements that can be made due their characteristics. These benefits include improved color gamut, higher contrast ratios, slimmer designs and better energy efficiency.
Firstly improved color gamut (or the range of colors that are possible) is made possible by the use of RGB LEDs in back-lit LED TVs. RGB LEDs are capable of producing a more complete spectrum of white light than fluorescent lights can. This 'whiter' light means that a wider range of color is produced when used to light an LCD panel, which ultimately makes for a better viewing experience. It is worth noting that LEDs are also used in edge-lit televisions, but these are usually white LEDs which have comparable qualities to fluorescent lamps are so produce a similar quality of picture.
The improved contrast levels are also applicable to rear-lit LED TVs rather than edge-lit LED TVs. This is because the many individual LEDs which are situated behind the LDC panel can be switched on of off in different areas to provide dark and light at the same time (as opposed to edge-lit which is either all on or all off).
With relation to size - the use of LEDs allows for the design of super slim televisions especially when used in the design of edge-lit TVs, this is because compared to fluorescent lamps, LEDs are much smaller and can be place round the edges of the LCD panel rather than to the rear.
The final benefit to LEDs is that they are more efficient than CCFLs reducing the power consumption by up to 40%. For a 60 inch LED TV that is used for 8 hours per day, this improvement can save up to $50 from your electricity bills over a year as well as making a contribution towards reducing carbon emissions.
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