Actuation mechanism for braille displays
US8770981B2 · kind B2 · utility
2Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2010 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Nov 26, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B21/004
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
According to the present invention, there is provided an improved refreshable tactile display apparatus including a housing, bias compression springs, sliding blocks, pins, and a shape memory alloy wire. The sliding block is actuated by the interaction between the bias compression spring and the shape memory alloy wire. The shape memory alloy wire is then activated by current driven from a power supply in either a modulated or unmodulated fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.