Backlight bleed Aspire S7-391

jonstatt
jonstatt Member Posts: 76 Troubleshooter

This is specifically concerning the 13.3" version.

 

When I first switch on the S7, there is noticeable backlight bleed around the edges (all of them) when the ACER logo first appears in green. Afterwards the backlight dims because of the ambient light sensor, and the backlight bleeding is nearly completely gone. So I can only see this issue briefly when I boot-up because I haven't found how to disable the ambient light sensor.

 

In view of the fact it isn't just one side that is bleeding, it would seem to be a design limitation of the panel rather than a fault. But I was curious how others find theirs?

 

Fortunately I do not have any stuck/dead pixels or any uniformity issues. In fact it is a very very uniform screen. Others have mentioned slight darkening of the bottom two corners. I can see it but only on an all white display and it is extremely slight indeed.

 

 

Answers

  • Joshua188
    Joshua188 Member Posts: 523 Mr. Fixit WiFi Icon

    do you think you could upload a picture?

  • jonstatt
    jonstatt Member Posts: 76 Troubleshooter

    I had a first go at taking a picture but if I use flash of course it is useless due to the reflection of the glass. If I don't use flash, the exposure means the whole screen looks like its bleeding. I will try again but it isn't easy to photograph it.

     

    I found that it is related to the pressue of the aluminium lid and 2 glass panels. If I lift the lid from one corner, I can completely change where the bleeding takes place.

     

    But as I say, other than the 2-3 seconds on the BIOS screen at the start, I never see ANY backlight bleed later because of the ambient light sensor taking over and dimming the backlight. You will never see it in actual use...just the start-up screen.

     

     

  • TheACN
    TheACN Member Posts: 15 New User

    I got the same. Thats the thing with edge lit screens. I saw worse bleedings with some cheap LED TV's. Anyway, that doesn't happen only in BIOS screen, actually its always there but due to color reproduction it's less visible. 

     

    Open paint, fill it with black color, save it, open the file with "windows photo viewer", press F11 to make it full screen, and you will see the bleeding again...

  • jonstatt
    jonstatt Member Posts: 76 Troubleshooter

    TheACN wrote:

    I got the same. Thats the thing with edge lit screens. I saw worse bleedings with some cheap LED TV's. Anyway, that doesn't happen only in BIOS screen, actually its always there but due to color reproduction it's less visible. 

     

    Open paint, fill it with black color, save it, open the file with "windows photo viewer", press F11 to make it full screen, and you will see the bleeding again...


     

    Thanks for your response. I know what you are saying, but the ambient light sensor kicks in after it has booted up and lowers the backlight level making the bleeding near invisible. Even if you lift the brightness to maximum, the ambient light sensor never lets you reach true maximum unless you shine a torch on the sensor. I can just about make out some very very faint bleed with the brightness on maximum after booting, but it is definitely the worst on first boot.

     

  • jonstatt
    jonstatt Member Posts: 76 Troubleshooter

    I just saw an S7-391 13.3 later batch unit and it was MUCH better. So they are not all the same. On this newer one you would never notice it whereas it was impossible to miss on my one.

  • twa
    twa Member Posts: 2 New User

    Hi,

    I've noticed the same backlight bleed issue on my machine. I can still return it to the store but I'm wondering if it's worth it if this is a common issue for the S7 range. Would you say the improvement you noticed in the more recent build was that dramatic and worth the hassle it would inevitably cause to get it changed?

  • jonstatt
    jonstatt Member Posts: 76 Troubleshooter

    twa wrote:

    Hi,

    I've noticed the same backlight bleed issue on my machine. I can still return it to the store but I'm wondering if it's worth it if this is a common issue for the S7 range. Would you say the improvement you noticed in the more recent build was that dramatic and worth the hassle it would inevitably cause to get it changed?


     

    That's a tough one as I haven't seen how bad yours is. I have not seen a perfect one although this newer one was noticeably better than my first. But they do vary. You could change it and end up with one that is worse. It isn't a fault as such where yours is different to everyone elses....its more of a lottery. So personally I would try and put it out of your mind and forget about it if you can.

  • twa
    twa Member Posts: 2 New User

    yeah I do believe that I'm probably nit picking as it's not really apparent in everyday use, but if it was a manufacturing issue that has been resolved I would definitely change. However, sounds more like its something that comes with the touch screen/ultrabook territory (I notice that touching/pushing the affected edges can reduce it somewhat).

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