Pierre Andre Grandjean, Martyn Andrew Cadman, Raymond Vuilleumier, Raymond Guye: Miniature display device. Centre Electronique Horloger, Parkhurst & Oliff, May 10, 1983: US04383255 (68 worldwide citation)

Each segment of a display device, e.g., a seven-segment display comprises at least one shutter normally obturating a cavity in a carrier on a base plate. Each shutter is suspended by two resilient attachments and can turn about a torsion axis established by these attachments under the influence of a ...