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Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Mon Jan 07, 2019 12:46 pm
by fri_night_in_ninsei
Hi. I just did an LED backlight swap on my X61s. Sooo much brighter and whiter. But I do get a ripple pattern on the bottom of the screen from the individual LEDs (as opposed to the original tube). Any techniques to mitigate that ripple pattern?

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Mon Jan 07, 2019 2:21 pm
by flyingfishfinger
Yeah, you can / should insert a diffuser strip above the LEDs.

You mean you're seeing this, right?

If you're using Monty's daylight kit they're included, otherwise you can use a similar material.

Read here, specifically under Shims and the differences between the Original and Daylight kits.


Good luck,
R

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Thu Jan 31, 2019 9:04 pm
by johnbuhan
What I see is more broad ripples. It's not concentrated at the bottom:

https://i.imgur.com/b1NWKBW.jpg

Is that normal? Did I put it in too tightly?

It's not an SXGA screen.

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Tue Feb 05, 2019 1:22 pm
by flyingfishfinger
Those look more like pressure spots, but someone with more experience in the display area should confirm that.

R

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Mon Feb 11, 2019 12:42 am
by johnbuhan
Hm, they only really became noticeable after the LED mod, but I can't be certain.

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Mon Feb 11, 2019 6:47 pm
by Thinkpad4by3
Wouldn't surprise me if the LED "chips" are causing the pressure...hence appearing as the backlight is causing the ripple.

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Tue Feb 12, 2019 7:37 am
by johnbuhan
Is there any way to fix that? I'm thinking of putting in an accordion shim to see if that will help, or maybe just try to put them in even looser. Unless that's permanent damage.

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Tue Feb 12, 2019 10:29 am
by Thinkpad4by3
I'm 99% sure that's not permanent damage.

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Sun Mar 17, 2019 10:17 pm
by Geartooth
Same issue with my X61 Samsung. Haven't bothered to try and fix it yet.

Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

Posted: Thu Apr 11, 2019 3:21 pm
by johnbuhan
It's good to know someone else has this issue as well. Do you know of any known ways to fix this? Otherwise I'm just going to try to make an accordion shim and see if that fixes it.