Uneven illumination on a 15" LCD

[kevinh]

Hi. I just got a 15" 2378-FZU. The screen is a little brighter along the bottom. It is not really apparent with the desktop, as the taskbar hides it. But it is apparent when I play DVDs full screen. Is this normal, and is there anything I can do to fix it or minimize it?

Otherwise, the laptop looks good - no stuck or dead pixels, Thai keyboard and Sony battery.

Thanks.

Kevin

[Plinkerton]

That's interesting. When I have a black background, it's noticeable on my 14 inch 2378-FVU. With any other window open though, or even when my desktop is not black or very dark, I don't notice it at all. It's definitely there though.

It's not really a bright line as yours sounds though. It's a very faint brightness that stretches up and fades as it reaches about 1/4 up the screen. The taskbar is definitely not big enough to "cover" it. It looks okay when i play DVDs also.

[kevinh]

The lighter area only extends up about 1/4" or so, and fades out. The taskbar is high enough to cover it, so it is only visible when playing DVDs full screen. And viewing angle has an effect; higher viewing angles make it more apparent. I quess uneven backlighting is just something we have to live with, cramming an LCD into a thin laptop cover. I was just hoping there was something I could do to eliminate it. Surely, there must be some some business card trick to fix this too. Ha!

[rocketman]

What you describe sounds like light leakage.Put on a totally black background to see if this is what it is.

[kevinh]

Well, the Eye-Bee-M screensaver has a black background, and the lighter area is definitely apparent when the screensaver is running. Is that light leakage? And from where? Thanks, Kevin.

[taphil]

It's probably normal. The backlight runs along the bottom of the screen. Laptop LCDs aren't as good as bigger desktop LCDs.

[kevinh]

That's about what I figured. Thanks.

[gimlix2]

Yep... it's completely normal to have that (the uneven lighting), unfortunately. I actually had my T42p sent in, and they had a product engineer take a look at it. The engineer said that it was normal for that to happen on that particular type of screen (my guess is the 15" flexviews?)

[kevinh]

Actually, it's a 15" XGA (1024 x 768). But it is far more noticable than on the 14.1" XGAs I've seen. Kevin

[Plinkerton]

Mine's a 14 inch SXGA+, so I guess it happens on those also.