[Vijay] has been working since 3 years on a Refreshable Braille Display but has only recently ... on is the Braille Keyboard – a tactile input device that can be used along with smart phones ...

They’re developing HaptiRead, a mid-air haptic feedback system that can be used as a touchless, refreshable display for Braille or 3D shapes. HaptiRead is based on a Stratos Explore development ...