Hypnoseye Turns Your iPhone Into a Projector
The HypnosEye lets you project images from the screen of your iPhone, iPod Touch or other mobile device onto a screen. Nope, it doesn’t take the video signal and project it using a separate light source – it actually uses a special anti-glare mirror and lens to blow up the screen onto a projection surface.
While it is sort of a cool analog hack, I can’t imagine you’d get much brightness from your mobile phone’s screen.