Dead Pixels

Guru · 29 Jan 2007 at 21:47

ok so I know what these are....but how do they come about??

Are they just there when the monitor is made and that's that? or can they suddenly appear?

If you got a tft with NO dead pixels would it defo stay that way or could it get some over time?

That leads me onto....if you have some I know there are policies whereby they may not take it back if you only have one of 2, but surely there is still the distance sellers act? So you could return it anyways?

My last tft had perfect panel (tm) so I didn't give it a second thought, but now I'm shopping for a different one I'm worried about it.

Cheers,

G

Kreeeee · 29 Jan 2007 at 22:00

They are caused by poor tolerances in manufacturing. They don't usually arise after manufacturing and usually they are dead for good. Stuck pixels, however, can be recovered a lot of the time by massaging and programs like UDPixel

Guru · 30 Jan 2007 at 18:27

so if you just keep using the distance sellers act you can get one without any dead pixels eventaully?

also, are there ANY tft's that dont have ANY backlight bleed?

fish99 · 30 Jan 2007 at 18:53

Trouble with the Distance Selling Regulations is you don't get your original postage back and you have to pay to return the screen. So each time you 'try' a screen it will cost you probably over £20.

I doubt there is a screen out there where every single one of them has no backlight bleed. There's always going to be a chance of it, unless maybe you go up to the professional quality screens like Eizo, but you do pay more. I suppose NEC are a notch above most of the other consumer grade screens in terms of quality so maybe have a look at the LCD20WGX2.

Dead/stuck pixels can develop through the life of a monitor but it's far more likely that they will be introduced during manufacture.

Guru · 30 Jan 2007 at 19:04

ah yeah didnt think about the £20 a time

IF a monitor has backlight bleed is that grounds to return it?

Just seems like such a lottery!

OspreyO · 30 Jan 2007 at 22:59

Guru said:
Just seems like such a lottery!

Its is. Though overall IQ problems are much less common than they used to be.

SkeeterUK · 1 Feb 2007 at 12:12

Personally if i buy a tft screen i would try and get it in the high street and get them to set it up for me to see if theres any problems such as dead pixels or bleeding even tho im not sure what bleeding is yet for tft as i have no frame of reference. And if its ok when its demo'd to me id buy it.

stoofa · 1 Feb 2007 at 13:34

There will always be some backlight bleeding.
This is mainly because of the way LCD's actually work - without any bleeding at all you wouldn't get a picture.
It's difficult to explain, however if you pay a big enough premium and bought one of the screens that are usually sold as medical display ones then bleeding would be at an absolute minimum - as low as possible.

At a consumer level price is important and all manufacturers will cut corners where possible because over the tens of thousands of units they will sell it makes for a substantial difference in overal profit.