I’ve started the project a couple of weeks ago but didn’t get the time to write anything about it yet.
Country of origin : Belgium
Type of Table: DSI
Screen Size: 22” 16:9 screen based on the LG W2242T LCD
Actual Table Dimensions: Coffee Table (or higher if required
Steps taken :
THE IR FRAME
- Soldered 80 IR LEDs
IR LEDs SPECS :
intensity typ. : 10mW/sr
viewing angle: 50°
wavelength (peak): 940nm
forward voltage: 1.2V
LED current (If): 20mA
- Inserted IR LEDs into drilled anodised “h” profiled aluminium rails
- Connected the whole frame to a computer power supply
THE LCD SCREEN (LG W2242T)
- Opened it up with the help of a small screwdriver to pop out the plastic case. The rest was quite easy as the backlight comes in one block. I may need to solder some extra wires in order to make the power cables longer. The LCD doesn’t seem to have any FFC problem, I would really recommand it for people wanting to try LCD methods for cheap prices (got my screen for around 120 €)
- Checked every element separatly. Backlight lights up just fine (it’s made of white leds around a piece of plexiglas + diffuser framed in metal. I’m still wondering if I should take the frame appart or not… The LCD also works perfectly
- Bought and received a 15€ PS2 Eye Toy. I just wanted to play around with it so I keep the PS3 version for later.
- Easily opened up the Eye Toy case (two screws to remove). The lens plastic cover was unclipped and the lens removed by unscrewing it. The IR filter was just a small additional glass maintainted by some plastic frame that I easily cut out with a small sharp cutter.
- Now I see what my IR leds are truly made of ! At first I was affraid that they wouldn’t be powerfull enough, now i feel a bit better (I have a video that i’ll post later) as the light travels up to my fingers even in the very center of the table. I still need to test it with the endlighten though
- Nothing much to say yet. I’ve installed everything needed to run CCV on Windows 7, tested out some demo’s but nothing really fancy as the table is not yet functionnal.
- I’m still waiting to receive my order placed a few days ago for a 530 by 370 mm, 8mm thick endlighten ordered at Plexiglas-shop (price is around 58€, shipping included). I’ve been trying to find some reseller that could handle the polishing (or laser cutting) of a piece of acrylic. Unfortunatly, for the small quantity I needed, it was hard to get a decent price (and had to ring back several times in order to get a quote… sometimes customer service gets really poor in Belgium ). So after talking with some people, I opted for the DIY solution....
- Bought 150, 240, 300 wet sandpaper + some extra polishing wheel for my driller for around 12€ (which means that it’s 2 times cheaper than getting it polished by some company + you learn something + it’s faster + you keeep the materials for later projects… No need to think about it twice !!!)
Well, that’s were i’m at at this moment. As you have probably noticed, I haven’t talked about the computer hardware, just because I’m planning on using a simple laptop for a start and once i figure out the config needed, I will probably buy separate computer parts or go for a “peripheral” approach (ie : keep the computer outside) as I want the lowest table possible.
Right now, I need to figure out how I am going to put all this together. Probably gonna do some 3D previz in order to figure out what’s working and what’s not. I saw some aluminium profiles that you could stick together using simple bolts and screws and build some modular structure to fix all the frames / screens / devices, but I couldn’t find any information on where to buy these.
Last thing I need to test is the distance from camera to endlighten. I’m gonna need a front surface mirror to bounce the image once in order to achieve low level for my table and I will have to figure out where to place that mirror.
I already have plenty of pictures and a couple of videos to show you but I am running out of time for today :p
Thanks for all the support offered by NUI Group members up to now. It’s been a delight to learn from you people