Electronics and the Electronics and the environmentenvironment

ET4407ET4407

LED backlight LCD versus fluorescent LED backlight LCD versus fluorescent backlight LCDbacklight LCD

OutlineOutline

• IntroductionIntroduction

• SLCA for both LCD’sSLCA for both LCD’s

• Explanation of the SLCAExplanation of the SLCA

• Target PlotTarget Plot

• ConclusionsConclusions

LED backlight LCD versus LED backlight LCD versus Fluorescent backlight LCDFluorescent backlight LCD

• Both LCD TV's are designed the same Both LCD TV's are designed the same way.way.

• The difference is the backlight.The difference is the backlight.

• LED backlight LCD T.V. uses light LED backlight LCD T.V. uses light emitting diodes to display the image.emitting diodes to display the image.

LED backlight LCD versus LED backlight LCD versus Fluorescent backlight LCDFluorescent backlight LCD

• While the Fluorescent LCD T.V. uses a Cold While the Fluorescent LCD T.V. uses a Cold Cathode Fluorescent Lamps i.e. CCFLCathode Fluorescent Lamps i.e. CCFL

• The aim is to analysis which is more The aim is to analysis which is more environmentally friendly by the use of SLCAenvironmentally friendly by the use of SLCA

SLCASLCA

• The SLCA consists of a 3x6 matrixThe SLCA consists of a 3x6 matrix• SLCA takes a look at both LCD TV’s under SLCA takes a look at both LCD TV’s under

the headings of global warming potential, the headings of global warming potential, resource depletion and toxicityresource depletion and toxicity

• With these headings our aim is to With these headings our aim is to analysis them at the levels of resource analysis them at the levels of resource extraction, manufacturing, extraction, manufacturing, transportation, product use, re-cycling transportation, product use, re-cycling and disposal.and disposal.

Completed SLCACompleted SLCA

• 0=Terrible 1= Very Bad 2= Bad 3= Average 4= Good 5= Excellent 0=Terrible 1= Very Bad 2= Bad 3= Average 4= Good 5= Excellent

Explanation of the SLCAExplanation of the SLCA

• First of all I will look at the TV’s under First of all I will look at the TV’s under their global warming impacts.their global warming impacts.

• Secondly, I will look at the TV’s under Secondly, I will look at the TV’s under their resource depletion impacts.their resource depletion impacts.

• Finally, I will look at the TV’s under Finally, I will look at the TV’s under their toxicity impacts.their toxicity impacts.

Global Warming ImpactsGlobal Warming Impacts

• For the LED backlight TV, the likes of For the LED backlight TV, the likes of arsenic and gallium have to be arsenic and gallium have to be mined.mined.

• For the Fluorescent backlight LCD TV, For the Fluorescent backlight LCD TV, mercury and phosphorus have to be mercury and phosphorus have to be minedmined

• Mining has a serious impact on global Mining has a serious impact on global warming, as seen in a previous warming, as seen in a previous presentation “what’s the problem”presentation “what’s the problem”

Global Warming ImpactsGlobal Warming Impacts

• As the LED are based on semiconductor As the LED are based on semiconductor technology, the manufacturing of them has technology, the manufacturing of them has a serious impact on global warming.a serious impact on global warming.

• This is because semiconductor This is because semiconductor manufacturing uses high energy manufacturing uses high energy consumption.consumption.

• While the manufacturing of the CCFL uses While the manufacturing of the CCFL uses less energy and is cheaper.less energy and is cheaper.

• The main worry for the CCFL is the mercury. The main worry for the CCFL is the mercury.

Global Warming ImpactsGlobal Warming Impacts

• The transportation of both types of The transportation of both types of TV’s are the exact same.TV’s are the exact same.

• Therefore have the same impact on Therefore have the same impact on global warmingglobal warming

Global Warming ImpactsGlobal Warming Impacts

• In the case of product use, the LED In the case of product use, the LED backlight TV uses 40% less power backlight TV uses 40% less power consumption than the CCFL.consumption than the CCFL.

• The LED can be switched on and off The LED can be switched on and off more quickly than the CCFL. more quickly than the CCFL.

Global Warming ImpactsGlobal Warming Impacts

• The end of life treatment of the LED The end of life treatment of the LED is by far better than of the CCFL.is by far better than of the CCFL.

• The LED can be re-cycled while the The LED can be re-cycled while the CCFL requires dedicated disposal CCFL requires dedicated disposal because of the mercury and because of the mercury and phosphorous.phosphorous.

• Overall the LED backlight TV is much Overall the LED backlight TV is much better on an global warming front.better on an global warming front.

Resource DepletionResource Depletion

• The likes of arsenic and gallium will The likes of arsenic and gallium will deplete after time like all resources.deplete after time like all resources.

• But the likes of mercury is very rare.But the likes of mercury is very rare.

Resource DepletionResource Depletion

• The manufacturing of the LED The manufacturing of the LED backlight TV would use a lot of backlight TV would use a lot of resources as the energy consumption resources as the energy consumption is highis high

Resource DepletionResource Depletion

• The transportation of the TV’s is N/A The transportation of the TV’s is N/A in this case.in this case.

• This is because a typical Samsung This is because a typical Samsung LCD TV of both types are exactly the LCD TV of both types are exactly the same packaging and transport cost.same packaging and transport cost.

Resource DepletionResource Depletion

• The LED backlight TV uses lesser The LED backlight TV uses lesser power so therefore is better than the power so therefore is better than the fluorescent backlight TV.fluorescent backlight TV.

• Therefore there is less power Therefore there is less power consumption from the home.consumption from the home.

Resource DepletionResource Depletion

• Once again the LED can be re-cycled, Once again the LED can be re-cycled, while the CCFL would have to be while the CCFL would have to be disposed of in a landfill.disposed of in a landfill.

ToxicityToxicity

• Both TV’s have harmful materials to mined.Both TV’s have harmful materials to mined.• The manufacturing of the LED requires more The manufacturing of the LED requires more

power so therefore would be more harmful.power so therefore would be more harmful.• The transportation of the two types of TV’s The transportation of the two types of TV’s

are the sameare the same• Because the CCFL have to disposed off and Because the CCFL have to disposed off and

contain mercury they are dangerous when contain mercury they are dangerous when they come to the end of life.they come to the end of life.

• On the other hand the LED can be fully On the other hand the LED can be fully recycled.recycled.

Target PlotTarget Plot

ConclusionsConclusions

• The SLCA score total was 50:24 in favour of the LED The SLCA score total was 50:24 in favour of the LED backlight LCD TV.backlight LCD TV.

• From the SLCA the LED LCD is a lot more From the SLCA the LED LCD is a lot more environmentally friendly.environmentally friendly.

• LED backlight LCD TV are the future.LED backlight LCD TV are the future.• There is progression in this area with the There is progression in this area with the

introduction of a sidelight LCD TV.introduction of a sidelight LCD TV.• This type of TV contains LED around the edge of the This type of TV contains LED around the edge of the

screen which disperse the picture along the screen.screen which disperse the picture along the screen.• http://www.youtube.com/watch?v=IKVp9Q-Z220http://www.youtube.com/watch?v=IKVp9Q-Z220http://www.youtube.com/watch?v=VnsZvf3SJn4http://www.youtube.com/watch?v=VnsZvf3SJn4http://www.youtube.com/watch?v=c1ZpUiBQiHEhttp://www.youtube.com/watch?v=c1ZpUiBQiHE