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LCD with no backlight

  • Thread starter Dirk Bruere at NeoPax
  • Start date
W

whit3rd

Jan 1, 1970
0
Since I've not taken one apart I don't know the answer to this, so...
If the backlight and rear cover are removed from a monitor is it
possible to have a cool looking transparent LCD display?
Yes, and no.

The rear cover is part (in most cases) of a clamp system that holds
electrical
elements in contact with the glass, so it can be removed only by
disconnecting
the data to the screen.

I've done this, and you can brush the display with your hands or other
objects and the static electricity makes it respond.
 
This is something I've done with early 90's vintage laptop monochrome
low-res LCD displays. Don't know how to do it with modern color LCD
monitors - I've just never tried. I thought it was moderately
difficult to keep the electronics attached to the early 90's vintage
low-res displays, I suspect the electronics and interconnects must be
much more dense on a modern hi-res LCD color monitor.

Tim.

In my experience it's a flex pcb cable that goes to the glass. On the
flex PCB are the gate and column drivers.
These are usually bare die flip chip assembled, potted in gunk.
http://www.national.com/opf/FP/FPD33684.html
The backlight is attached mechanically and can be easily removed. I
built a crappy projector like this once.
 
N

Nico Coesel

Jan 1, 1970
0
Dirk Bruere at NeoPax said:
Since I've not taken one apart I don't know the answer to this, so...
If the backlight and rear cover are removed from a monitor is it
possible to have a cool looking transparent LCD display?

Yes. Actually, I salvaged the screen from the monitor I'm using right
now from some sort of stereo-vision monitor. It still has a special
polarising filter between the backlight and the screen itself which
was retrofitted.
 
T

The Real Andy

Jan 1, 1970
0
Since I've not taken one apart I don't know the answer to this, so...
If the backlight and rear cover are removed from a monitor is it
possible to have a cool looking transparent LCD display?


Take a look at the Aruze hybrid slots:
http://www.aruze.com/en/products/millenary/luckyfrankie/index.html

These are actually stepper motor reels behind an LCD. The LCD can
block out the the reels, as well as provide different backrounds. I
saw tournament versions of these slots recently and they are pretty
awesome to look at.
 
B

Bob Larter

Jan 1, 1970
0
Dirk said:
Since I've not taken one apart I don't know the answer to this, so...
If the backlight and rear cover are removed from a monitor is it
possible to have a cool looking transparent LCD display?

Yes, but I promise you that the novelty value wears off pretty quickly,
because it's a pain to actually use your computer that way. ;^)
 
B

Bob Larter

Jan 1, 1970
0
Tim said:
This is something I've done with early 90's vintage laptop monochrome
low-res LCD displays. Don't know how to do it with modern color LCD
monitors - I've just never tried.

I've done it. You disassemble the display panel, removing the
backlight & the diffuser, then reassemble the panel - with spacers,
if necessary. If you were going to make it a permanent project, you'd
need to make a big cutout on the back panel, of course.
I thought it was moderately
difficult to keep the electronics attached to the early 90's vintage
low-res displays, I suspect the electronics and interconnects must be
much more dense on a modern hi-res LCD color monitor.

Yes, they are.
 
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