CCFL Versus LED: Is There A Downside To Going Green?

[kamamura]

New LED backlit monitors I saw (Eizo Foris 2332BK, Fujitsu 23T-6P) both had too low PWM dimming duty cycle, causing subliminal flicker that really hurts my eyes. I have read reports of headaches, nausea migraines. Stroboscopic light similar to the one produced by PWM flicker can IMO damage human neural system and aggravate problems like Photophobia

http://vasyafromukraine.webs.com/

 

[flavious_91]

The going green option claim is just plain rubbish, designed to justify the change from CCFL to LED technology, the truth of the matter is there is no direct comparison between the two in terms of power consumption, some TV manufactures claim reduced power consumption using LED backlighting, what they often fail to mention is that the light output in lumens is often far less.

No doubt TV manufactures prefer LED backlights over CCFL, this has nothing at all to do with the green issue, instead it has to cost and design considerations, it is true that LED modules are more expensive to manufacture that their equivalent CCFL counterparts, but overall it is significantly cheaper to design and manufacture a LED TV.

To put and put things into perspective, It is true also that CCFL tubes used on TV and laptops contain a very small amount of mercury in the form of a vapour, but this is normally less that standard household florescent lamps, and far less again that standard florescent strip light, I notice that the 'save the planet' green camp were keen to promote the use of low power high efficiency fluorescent lamps over conventional tungsten bulbs, but often inflate the issue out of all proportion to what it is, and fail to mention the mercury issue when it suits them, which in reality is no issue at all if the lamps are disposed of safely.

 

[flavious_91]

The going green option claim is just plain rubbish, designed to justify the change from CCFL to LED technology, the truth of the matter is there is no direct comparison between the two in terms of power consumption, some TV manufactures claim reduced power consumption using LED backlighting, what they often fail to mention is that the light output in lumens is often far less, however some manufactures, if not all, try to compensate by running LED modals at or beyond their design limits, resulting in a reduced life span .

No doubt TV manufactures prefer LED backlights over CCFL, this has nothing at all to do with the green issue, instead it has to cost and design considerations, it is true that LED modules are more expensive to manufacture that their equivalent CCFL counterparts, but overall it is significantly cheaper to design and manufacture a LED TV .

To put and put things into perspective, It is true also that CCFL tubes contain a very small amount of mercury in the form of a vapour, but this is normally less that standard household florescent lamps, and far less again that standard florescent strip light, I notice that the 'save the planet' green camp were keen to promote the use of low power high efficiency fluorescent lamps over conventional tungsten bulbs, but often inflate this issue out of all proportion to what it is, and fail to mention the mercury issue when it suits them, which in reality is no issue at all if the lamps are disposed of safely.

Also I am in broad agreement with what SabreWulf69 05/08/2011 11:41 AM , has to say on the matter