Comments on: Broken LCD TV turned into a light table

By: zulu127

zulu127 — Mon, 28 Mar 2011 17:39:55 +0000

Here’s the link:

This is the best answer I’ve gotten–just picked it up.

http://answers.hackaday.com/is-it-possible-to-use-an-old-lcd-as-a-diffused-light-source-in-other-words-just-have-the-ccfl-on-so-that-the-lcd-would-be-totally-white/

By: zulu127

zulu127 — Mon, 28 Mar 2011 16:27:38 +0000

@ daniel w That’s exactly what I am trying to do as well and usually end up getting to about ***HERE*** using various avenues of research. No one has been able to help me power up an LCD from a laptop without using the accompanying computer.

By: daniel w

daniel w — Wed, 15 Sep 2010 02:17:17 +0000

hey all good itea amd im using a lcd monitor as a light table the only thing is i have to keep it plugged in to my computer and extend desktop to keep backlight on.
the lcd is broken and only backlight works.

i would like to figure out what to do to keep backlight on, i’m an electronics amateur, i know a little but dont want anything to involved.

have tried resistors across vga imputs, looked up pinout and other sites but cant seem to figure out how to keep it on short of plugging into computer and making active monitor.

HELP PLEASE
Dan

By: Janette

Janette — Tue, 06 Jul 2010 03:20:28 +0000

My work donated a busted screen 32″ Apex Digital HDTV to me, but needed to keep the working power supply board and controller board for other projects. With just the inverter board and screen, is it possible to supply power enough for the backlight to craft into a light table?

By: Sheree Showe

Sheree Showe — Wed, 21 Apr 2010 08:36:16 +0000

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By: sony bravia 40

sony bravia 40 — Tue, 01 Dec 2009 23:14:13 +0000

Yeah, gotta watch the Mercury… otherwise these are great for coffee tables, ironing boards, fireplace covers, and/or otherwise making it look like you own a lot of TVs…

By: Sony Me

Sony Me — Sat, 07 Mar 2009 22:38:37 +0000

Hello. Great job. This is a great post. Thanks!

By: tom

tom — Thu, 25 Sep 2008 02:24:24 +0000

Just a word of caution. While taking apart an lcd monitor, I realized that I opened the florescent light part of the monitor and probably exposed myself to the mercury.

By: JDN

JDN — Wed, 24 Sep 2008 18:11:56 +0000

Maybe I missed it, but what brand of LCD TV is this?

How did you find out the RS-232 command set?

Are there RS-232 commands for controlling the brightness?

By: SteveDiRaddo

SteveDiRaddo — Mon, 22 Sep 2008 23:44:10 +0000

There is no evidence at all that liquid crystals pose a health risk for humans, but tests are ongoing. At this point in time the teeny bits of glass that shred off at the edge of a cracked screen are far more dangerous.

By: gerald

gerald — Mon, 22 Sep 2008 22:06:48 +0000

I’ve just tried this with a broken LCD. After LCD screen removal, the remaining light panel is very interesting: portable lighting system for photography/video, or may be flat light on the wall or ceiling…

On mine, there’s a light diffusing plastic sheet on top of lighting panel, but once LCD panel removed, nothing keeps it in place anymore. So i’ve tried to dismantle the LCD panel itself hoping i could reuse the plastic screen.

On one side, there was an adhesive sheet of dark plastic, and just under the broken glass. Once removed, the remaining part cleaned of the liquid cristal, i’ve realized it is in reality a polarising filter and could be usefull also! But in the other hand, it is a little dark, so it reduces the amount of light going through. I think i could remove another adhesive sheet of plastic on the other side but i prefer to keep the polarising filter as is.

After this process, i was wondering if liquid cristal could be toxic. I should have think about this before dismantling the LCD glass panel :-< Does anybody know?

By: kraemahz

kraemahz — Mon, 22 Sep 2008 21:37:46 +0000

keystoneclimber,

he’s just using the CCFL bulbs, not the LCD screen. They’re pretty darn white.

By: keystoneclimber

keystoneclimber — Mon, 22 Sep 2008 20:45:14 +0000

This is not very effective for serious transparency (slide) review. Real light tables produce actual white light. Use a loupe to look at the “white” screen on the monitor and you will see the readily apparent components of the additive (RGB) color system rather than the white you expected.

By: mike

mike — Mon, 22 Sep 2008 20:27:50 +0000

well at least the busted tv didn’t get thrown in the trash can like everything else that breaks these days.