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Keyboard backlight T61

T60/T61 series specific matters only
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steweee
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Location: Voronezh, Voronezhskaya Oblast' Russia

Keyboard backlight T61

#1 Post by steweee » Tue Jun 11, 2019 3:16 am

Hi!
Is there a keyboard on the T61 with built-in backlight? (not a flashlight in the top cover)
Maybe someone bought and installed it?
Or had the experience of installing your own backlight in the keyboard?
I would appreciate the help

wujstefan
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Re: Keyboard backlight T61

#2 Post by wujstefan » Tue Jun 11, 2019 4:27 am

Nope, not this type of keyboard.
I remember seeing a failed effort to install one somewhere on the Chineese forum.

I guess this is a "dreamt feature"? :)
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Thinkpad4by3
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Re: Keyboard backlight T61

#3 Post by Thinkpad4by3 » Tue Jun 11, 2019 10:15 am

Replace the Thinklight with a UV led and the keys legends will fluoresce.
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.

BillMorrow
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Re: Keyboard backlight T61

#4 Post by BillMorrow » Tue Jun 11, 2019 10:54 am

Thinkpad4by3 wrote:
Tue Jun 11, 2019 10:15 am
Replace the Thinklight with a UV led and the keys legends will fluoresce.
4by3 now THAT is an interesting trick.. have you done it..? finding just the right device might be tricky.. :)
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She was not what you would call unrefined,
She was the type of person who kept a parrot.
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axur-delmeria
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Re: Keyboard backlight T61

#5 Post by axur-delmeria » Tue Jun 11, 2019 11:23 am

The only keyboard that has :
[*] same connector as the T61, and
[*] backlight

is the one from the T430/530, X230 and W530. Problem is:
[*] its keyswitch matrix is not 100% compatible with the T61
[*] the mounting points are completely different

And trying to make the backlight work without burning some component in the system board is going to be an interesting challenge.
4by3 now THAT is an interesting trick.. have you done it..? finding just the right device might be tricky..
I see two challenges:
[*] finding a UV LED of the same size as the Thinklight LED.
[*] soldering said LED without melting/burning the flex cable. :cry:
Daily driver: X220 4291-C91 i7-2620M

Backup: X601 Core 2 Duo T8100
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Re: Keyboard backlight T61

#6 Post by Thinkpad4by3 » Tue Jun 11, 2019 12:26 pm

BillMorrow wrote:
Tue Jun 11, 2019 10:54 am
4by3 now THAT is an interesting trick.. have you done it..? finding just the right device might be tricky.. :)
I have not but given just about anything in the light-grey to white will glow brightly under a blacklight, I'd figure its work a shot.
axur-delmeria wrote:
Tue Jun 11, 2019 11:23 am
I see two challenges:
[*] finding a UV LED of the same size as the Thinklight LED.
[*] soldering said LED without melting/burning the flex cable. :cry:
Challenge accepted.
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.

BillMorrow
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Re: Keyboard backlight T61

#7 Post by BillMorrow » Sat Jul 06, 2019 1:38 am

Thinkpad4by3 wrote: Challenge accepted.
so just fine some IR device, power it up and point it at the keyboard and see if it will light the white up..
to prove the concept.. that is how i would proceed..
THEN see if a device can be found to replace the thinklight device..
have no idea what the structure surrounding he thinklight looks like thts about all i have to contribute.. :)
Bill Morrow, kept by parrots :parrot: & cockatoos
Sysop - forum.thinkpads.com

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She was not what you would call refined,
She was not what you would call unrefined,
She was the type of person who kept a parrot.
~~~Mark Twain~~~

Thinkpad4by3
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Re: Keyboard backlight T61

#8 Post by Thinkpad4by3 » Sat Aug 03, 2019 7:14 pm

BillMorrow wrote:
Sat Jul 06, 2019 1:38 am
Thinkpad4by3 wrote: Challenge accepted.
so just fine some IR device, power it up and point it at the keyboard and see if it will light the white up..
to prove the concept.. that is how i would proceed..
THEN see if a device can be found to replace the thinklight device..
have no idea what the structure surrounding he thinklight looks like thts about all i have to contribute.. :)
I did exactly this after I found my UV light source. Sadly, both my T420 keyboards and X61 keyboards were completely unreactive. Surprisingly, my TP 755C keyboard lit up like a christmas tree under a UV lamp.
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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