Reading through this forum and working on 2 multitouch screens for a school project, I decided I wanted a LCD FTIR setup to use at home, for testing and photoshop etc.
Because I already have a Philips 220WS 22” monitor, and have no money for a beamer, I think I have to take the risk and open the LCD screen to see what I can do with it! Spec sheet (PDF)
I already ordered a big load of 850nm IR leds from LEDS-buy.nl (13 cents/LED), and there is some free plexiglass waiting for me at school (cut to size by a laser -> no sanding!)
I am going to use a Sony DCR-HC14E digital video recorder, with nightshot enabled it’s the perfect infrared camera! Connected with firewire I hope I get a high framerate, the first tests I did were very promising.
Oke, enough blabla. Let’s show some pictures of my (very slow) dissassembly of the LCD screen:
With only 4 screws and some gentle force I managed to remove the back of the panel.
There was this little connector on the back, but it was removable from the circuit board. I made a good start!
The front panel was easily removed, no screws!
After removing 2 screws, the front panel could be seperated from the circuit boards. There were some wires though still attached:
They could all be seperated from the screen, with simple connectors
The protective cover of the LCD driver board was easily removed, now I had to be carefull not do damage the tiny flat cables…
After removing another metal piece I saw the complete front-screen. Looks like the glass is glued on it, or something. Don’t know yet.
The backside has some white paper, with the backlight underneat it. Now it was really getting interesting…
I managed to remove the complete backlight, with no damage! Yay!
There are some layers of material between the backlight and the LCD screen. A diffused plastic, a silver-like screen, another diffused plastic, and another see-through screen.
After writing this I’m going to test if everything still works, and how good Infrared light can pass the different screens. So stay tuned for new updates!