ideation and discussion

Sketches were made to sum up the ideas. The most ideas I found with my colleague students here have those features:

1, it mainly plays a role of "leading". Compared to GUI based devices, which can show an overview of the whole map, and thus is much easier to help user build mental map of the space, a device that doesn't rely on GUI has much bigger challenge to do the same. A dedicate high resolution tactile display might be able to complement, but the cost and size make it not so satisfactory as a solution.

2, it uses other channels than visual to communicate. Almost all the senses of human were mentioned.

3, it resembles to objects people normally wear on daily basis. Like glasses, ear rings, shoes, jackets, watches etc. Considering the "being ordinary" criteria, it makes sense.

After discussion, I found myself more inclined towards the wristband direction. It is easier to be accepted for daily use, less obtrusive, and also has some unique qualities that will facilitate the usage.

As the ideas develop, I thought it's natural to have gestural interface on this device, although audio interface is still indispensable.