The real reason a smartphone doesn't have a built-in projector just yet is because it would make the device really thick. People love their devices to be big, but not thick.

So Texas Instruments have found a way to convince handset makers to include a miniscule projector. They have a new 0.3 inch HD DLP Pico chipset.

DLP chips use an array of microscopically small mirrors that reflect red, green or blue light to produce an image. They have managed to squeeze twice as many of those mirrors onto this chip to produce a 1280x720 HD image with twice the brightness of its predecessors.

The chipset also uses around 50 percent less power than previous versions. Will be see a projector on our phones pretty soon? [Texas Instruments via Engadget]