Candidates of our ring concepts

We started to evaluate the novelty of joystick inputs in terms of research through papers(related works).
There are isometric joysticks, isotonic joystick, and touchpads.

• An isometric joystick (e.g., the IBM Trackpint) is a force-sensing joystick that returns to center when released.
  
• Isotonic joysticks sense angle of deflection.
  
• Touchpads are small, touch-sensitive tablets often found on laptop computers.
  There are lots of movement based input device but force input device are usually used as supplementary device.
  Force based input is smaller than movement based input so that force based input was more appropriate for small ring.
  If you put the touchpad on the ring, it will be very small and you have to do repetitive and discontinuous tasks.
  Therefore, we decided to find more works on force based input to evaluate novelty in terms of research.
  

More papers on force based input

1. Inflatable mouse: volume-adjustable mouse with air-pressure-sensitive input and haptic feedback
   

1. Direct and intuitive input device for 3-D shape deformation
   

“Okay, we are done with papers. The force based input is less-crowded area, there is little studies.” - Ian Oakley

Pros and Cons of force based input

Pros

You can move the cursor without moving your arms. Especially, if you have a sensor on your hand, it can be used without pushing back because it is used in hand.
</cite>

Cons

It is difficult for beginners to learn first. Although it is easy to operate in one direction, it is difficult to move the cursor in a circular shape.