When smartphones are encroaching on compact cameras' turf, how does a company try to stay relevant making sensors for those cameras? By upping the resolution, of course. Toshiba has given a peek at the TCM5115CL, a 1/2.3-inch, backside-illuminated CMOS sensor that hits 20 megapixels -- a big jump from the 16-megapixel sensors in many point-and-shoots and some smartphones. To combat the noise and sensitivity problems that usually
