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

X60/X61 series specific matters only.
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fri_night_in_ninsei
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Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

#1 Post by fri_night_in_ninsei » Mon Jan 07, 2019 12:46 pm

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?

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

#2 Post by flyingfishfinger » Mon Jan 07, 2019 2:21 pm

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

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

#3 Post by johnbuhan » Thu Jan 31, 2019 9:04 pm

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.

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

#4 Post by flyingfishfinger » Tue Feb 05, 2019 1:22 pm

Those look more like pressure spots, but someone with more experience in the display area should confirm that.

R

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

#5 Post by johnbuhan » Mon Feb 11, 2019 12:42 am

Hm, they only really became noticeable after the LED mod, but I can't be certain.

Thinkpad4by3
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Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

#6 Post by Thinkpad4by3 » Mon Feb 11, 2019 6:47 pm

Wouldn't surprise me if the LED "chips" are causing the pressure...hence appearing as the backlight is causing the ripple.
Thinkpad4by3's Law of the Universe.

The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.

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

#7 Post by johnbuhan » Tue Feb 12, 2019 7:37 am

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.

Thinkpad4by3
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Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

#8 Post by Thinkpad4by3 » Tue Feb 12, 2019 10:29 am

I'm 99% sure that's not permanent damage.
Thinkpad4by3's Law of the Universe.

The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.

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

#9 Post by Geartooth » Sun Mar 17, 2019 10:17 pm

Same issue with my X61 Samsung. Haven't bothered to try and fix it yet.
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johnbuhan
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Re: Any way to mitigate ripple pattern when swapping LCD backlight strip to LED ?

#10 Post by johnbuhan » Thu Apr 11, 2019 3:21 pm

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.

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