The ACD’s are LCD so I was wondering if anyone thinks its possible to use one for multitouch?

I already know how to disassemble one (don’t ask why) and would prefer working with an lcd monitor.

And also if I were to put plexiglas over the LCD for protection would it still work?

Shawn - 24 October 2007 08:06 PM

The ACD’s are LCD so I was wondering if anyone thinks its possible to use one for multitouch?

I already know how to disassemble one (don’t ask why) and would prefer working with an lcd monitor.

And also if I were to put plexiglas over the LCD for protection would it still work?

Basically you can. Here is a few projects in which people try to use LCD-display as image source. (Myself for example)
I haven’t disassembled ACD but technique should be same in every LCD-monitor. Here is few things I have learned:

-LCD-display lets IR light trough (except the last layer of reflective material which has to be removed)
-In my old display the circuit boards which run the actual display panel come at way for using camera, so it is not possible to use my display without modifications. you´ll find picture of this from my blog.  I don’t know of ACD. If you post pictures of disassembling it, it would be nice.
-It is not possible to use DI-solution with LCD:s original backlight installation, because the diffusor sheets reflect IR very strongly.
-LCD-display is very sensitive to dirt and objetcs between backlight source and display panel
-Best solution would be capasitive sensing (it is hard to build tough), but as far as i understand these things the FTIR-system using LCD-display is very doable.

Thanks for the great reply.

Checkin out your site now.

kam how about making it DI but not using the backlight to do the DI

The ACDs use polarized filters to create the glossy effect, could this be a problem?

ACD’s are a kinda expensive solution to this, how about you sell it, and get a larger, cheaper display. You might even have enough money left over for a iphone, or four.

Already have one

then you can get a zune

or evena xbox 360, a WII, and a ps3

those three combine is still like % 50; cost of a ACD,

Screw you Americans… I tested yesterday iPod Touch and just waiting to get iPhone…

Kamelisko - 25 October 2007 04:40 AM

Shawn - 24 October 2007 08:06 PM

The ACD’s are LCD so I was wondering if anyone thinks its possible to use one for multitouch?

I already know how to disassemble one (don’t ask why) and would prefer working with an lcd monitor.

And also if I were to put plexiglas over the LCD for protection would it still work?

Basically you can. Here is a few projects in which people try to use LCD-display as image source. (Myself for example)
I haven’t disassembled ACD but technique should be same in every LCD-monitor. Here is few things I have learned:

-LCD-display lets IR light trough (except the last layer of reflective material which has to be removed)
-In my old display the circuit boards which run the actual display panel come at way for using camera, so it is not possible to use my display without modifications. you´ll find picture of this from my blog.  I don’t know of ACD. If you post pictures of disassembling it, it would be nice.
-It is not possible to use DI-solution with LCD:s original backlight installation, because the diffusor sheets reflect IR very strongly.
-LCD-display is very sensitive to dirt and objetcs between backlight source and display panel
-Best solution would be capasitive sensing (it is hard to build tough), but as far as i understand these things the FTIR-system using LCD-display is very doable.

I’m working on basicaly the same project but with FTIR, not DI check my blog for more info…