This LumiWatch prototype watch is projected onto the wearer's arm or interactive surface area, enabling them to touch and slide the skin to use the watch.

In other words, LumiWatch can turn the user's arm into a touch screen. According to the staff, sliding to the left can unlock the watch, and the application will be displayed along the arm. This watch can project a 40-square-centimeter interface, which is about 5 times larger than a standard smart watch.

Researchers say that skin is like an attractive plane, which can support interactive display. Although there are some flaws in color and physical characteristics, it does not affect the skin to provide high-resolution and high-quality images for smart watches.

LumiWatch is fully equipped and consists of logic board, projector, depth sensor, metal shell and battery. The projector uses red, blue and green lasers, and the projection brightness is enough to be seen outdoors.

The watch is equipped with 15 lumen scanning laser projector, continuous 2D finger tracking, Qualcomm 1.2 Ghz quad-core CPU, 768MB running memory, 4GB flash memory, 740 mAh lithium-ion battery, and has Bluetooth and wireless functions. Running Android 5. 1 system has a long battery life.

Researchers at Carnegie Mellon University said that this smart watch will be put on the market for $600.

The prototype of this watch is very large, with the size of 50 mm x 4 1 mm x 17 mm, which is much larger than the size of Apple's third-generation watch of 42.5 mm x 36.4 mm x11.4 mm.

However, there is no exact news about when this watch will appear on the shelves of retail goods.