Lol. I think we got our wires crossed there :), I wasn't talking about being able seeing fingers through it (which agreed, would need a LOT, if its even possible!).
I wasnt saying that though, i was simply saying not a lot of light (not projector bulbs anyway) is needed to see the image on the screen, just a suitably bright polarized white light (that runs cool ie UBLEDS or strip lighting). I realise now you were talking about shining a light through the pixels in their darkened state (eg. black), which of course dont allow much light through at all.
However, I was originally talking about trying to use an infra red/heat imaging camera to detect the fingers with a normal or heat improvised backlighting solution.
I wasnt saying that though, i was simply saying not a lot of light (not projector bulbs anyway) is needed to see the image on the screen, just a suitably bright polarized white light (that runs cool ie UBLEDS or strip lighting). I realise now you were talking about shining a light through the pixels in their darkened state (eg. black), which of course dont allow much light through at all.
However, I was originally talking about trying to use an infra red/heat imaging camera to detect the fingers with a normal or heat improvised backlighting solution.