Life of LCD TV

[The_Big_K]

Hi CEans,

Can anyone of you throw light on the 'life of LCD TV'? What does the term 'viewing hours' refer to and what happens to the screen once the 'viewing limit' is crossed?

-The Big K-

[mahul]

_k this is what i found after a little google search...the life of an lcd tv(or for that matter any tv) as specified is actually the half-life(some similarity with the half-life of a 1st order reaction? i dunno...maybe). after these many veiwing hours the brightness and vibrance of the tv is supposed to fall to half the original value. u might use it even after that,if the lack of picture quality doesn't put u off(there wd be no one to prevent u from doing that anyway), but with the half lives of typical lcd's being around 60,000 hours(close to 10 years with 20 hrs of usage every day), i doubt whether i need to worry about my screen(unless my manufacturer has bluffed me).

[The_Big_K]

Originally Posted by mahul

_k this is what i found after a little google search...the life of an lcd tv(or for that matter any tv) as specified is actually the half-life(some similarity with the half-life of a 1st order reaction? i dunno...maybe). after these many veiwing hours the brightness and vibrance of the tv is supposed to fall to half the original value. u might use it even after that,if the lack of picture quality doesn't put u off(there wd be no one to prevent u from doing that anyway), but with the half lives of typical lcd's being around 60,000 hours(close to 10 years with 20 hrs of usage every day), i doubt whether i need to worry about my screen(unless my manufacturer has bluffed me).

Hi Mahul,

Thanks for your reply. Where did you get the information about 'half life' of LCD? Could you please mention the source?

I do know that the picture quality degrades once the 'view hour quota' is exceeded, but is it the 'brightness' or the 'contrast' that goes down?

-The Big K-

[mahul]

it's the brightness that goes down actually _k, as mentioned all over. i'm really sorry cause i never found any comprehensive information. rather i found just a little mention in most sites and blogs comparing lcd-tv's with other other display screens. here's one link for example : www.dtvcity.com/lcdtv/lcdtvresources.html
anyway a google search with "life of an lcd tv" yeilds lots of such other sites and they all seem to agree that it's the brightness that actually dims to half

[kidakaka]

Hey Mahul,
Does the half life (no not the game!!) have to do anything with the one related to radioactive elements? If it is, then is not the LCD tv screen toxic due to the very radiations?

[mahul]

no kidakaka there are no radioactive elements used in an lcd tv, but since all reactions (not only nuclear but also chemical) have a half-life hence the discharge inside a lcd-tv (which is also supposed to follow some sort of kinetics) also has a half-life. And by the way it seems to me that having radio active substances inside a tv would be way too dangerous(pls do correct me if i went wrong anywhere)

[The_Big_K]

Originally Posted by kidakaka

Hey Mahul,
Does the half life (no not the game!!) have to do anything with the one related to radioactive elements? If it is, then is not the LCD tv screen toxic due to the very radiations?

LCD TV & Radioactivity Yay!

After Mahul posted, I searched a bit and found out about Half-Life stuff he talked about. LCD screen would display quality picture for 60,000 hours and once that limit is crossed, the bulb that powers the LCD (don't have much information about this yet) needs a replacement.

Of course, it has nothing to do with radioactivity.

Btw, Plasma TV has a shorter life of about 35,000 - 40,000 viewing hours.

-The Big K-

[mahul]

yeah _k u r right and i wd like to add that a crt screen has an even shorter half-life of about 15000-20000 hours

[ash]

I hear CRT monitors do emit radiation, mostly from the rear.

[mahul]

but that is not radioactive radiation, rather it is some other form of radiation, mostly uv as far as my knowledge goes.