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UV Light and LCD Screen
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Fresh-Faced Recruit
Join Date: Sep 2004
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Hi, I was just wondering about something- I know sunlight (because it contains UV light) is detrimental to LCD screens. I have my powerbook on my desk most of the time, all day long, with the sun streaming through the window. I was just thinking, couldn't the sunlight shine through the Apple logo on the lid of the powerbook, and cause damage to the LCD screen over a period of time?
Any thoughts?
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Forum Regular
Join Date: Oct 2003
Location: Germany
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Doesn't window glass filter UV rays?
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Professional Poster
Join Date: Apr 2001
Location: Asheville, NC
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Originally posted by Xanadu:
Hi, I was just wondering about something- I know sunlight (because it contains UV light) is detrimental to LCD screens. I have my powerbook on my desk most of the time, all day long, with the sun streaming through the window. I was just thinking, couldn't the sunlight shine through the Apple logo on the lid of the powerbook, and cause damage to the LCD screen over a period of time?
Any thoughts?
I think you are worrying too much. Get AppleCare. Then, if it does cause a problem within the first three years, it's covered. If it doesn't cause a problem within the first three years, then it probably wasn't an issue to begin with.
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ACSA 10.4/10.3, ACTC 10.3, ACHDS 10.3
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Mac Elite
Join Date: May 2004
Location: on 650 cc's
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Originally posted by phantomac:
Doesn't window glass filter UV rays?
I doubt that, unless you have special glass placed ...
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stuffing feathers up your b*tt doesn't make you a chicken.
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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What makes you think that UV will damage an LCD?!? Heck, the fluorescent backlight tubes probably emit some residual UV themselves, and tons of LCDs are in constant exposure to UV light.
Sunlight does not damage LCDs. It can make them hard to read, if it's not designed for bright light, and if it causes the panel to overheat, it can cause it to not respond correctly until the temperature returns to normal. (That's why car stereos use special LCDs that can handle temperature extremes.) But even a normal LCD suffers no permanent damage from temperature extremes, they work fine once returned to normal operating temperature.
tooki
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Senior User
Join Date: Sep 2000
Location: UK
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Originally posted by d.fine:
I doubt that, unless you have special glass placed ...
I seem to remember that it does. It's unlikely to be 100% with normal glass, but it definitely is harder to get a tan from behind glass - e.g. when in a car.
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Junior Member
Join Date: Mar 2003
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Definitely UV light shortens a lifetime of a LCD. The reason is that exposure of UV light in a long period causes arrays of liquid crystal inside a LCD panel to break down. In addion to the Sun, backlight of the LCD also emits UV light, too. That is why LCD of an old notebook becomes yellowish even in a white back bround. But the period of exposure to cause a damage is longer than a lifetime of the backlight of the LCD. Don't worry about it too much.
How do I know that? As a physicist, I studied the properties of LCD long time ago.
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Last edited by wedgewood; Oct 7, 2004 at 08:46 PM.
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1.33 GHz 12" powerbook, 1.25GB
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