US Patent 10276066 Refreshable Braille display device

A refreshable Braille display device comprising a rotatable shaft a plurality of pairs of polygonal discs that selectively rotate about the shaft. Each disc comprises a plurality of outer edge surfaces, each of which comprising a plurality of cell elements fixedly disposed thereon wherein, the cell elements comprise pins, depressions, or a combination of both. The cell elements of two aligned outer surfaces of a pair of discs form a character cell representative of a Braille character. An outer surface is rotatable between one readable position and a plurality of non-readable positions wherein, a Braille character is accessible when the aligned outer surfaces are in the readable position. The device further comprises a converter module for converting text to output Braille and an order module for assigning a target outer surface to each disc in accordance with the output Braille.