公开(公告)号：US20250061817A1

公开(公告)日：2025-02-20

申请号：US18235158

申请日：2023-08-17

Applicant: Freedom Scientific, Inc.

Inventor： Patrick Murphy ,  Todd Conard ,  Walter van Tujil ,  Katelyn Alvies ,  Eric Gerolstein

IPC: G09B21/00

Abstract: Disclosed are overload protection pins (“OP Pins”) for use in a Braille display. Each OP Pin in the display is placed above an associated actuator pin, which allows the OP Pins to be selectively driven upwardly or downwardly. This, in turn, allows the OP Pins to be selectively positioned to generate Braille characters that can be sensed by a BLV user. However, when excessive forces are encountered (defined as forces beyond the standard sensing pressures applied by BLV users) the OP Pins yield and are retracted to a position beneath the upper surface of the Braille display. This serves both to protect both the OP Pins and the underlying actuator mechanisms. Once the excessive force is removed, the OP Pin recovers to its original height.

公开(公告)号：US20230252911A1

公开(公告)日：2023-08-10

申请号：US17668034

申请日：2022-02-09

Applicant: Freedom Scientific, Inc.

Inventor： Todd Conard ,  Walter van Tujil ,  Patrick Murphy ,  Maarten van Egmond

IPC: G09B21/00

CPC classification number: G09B21/004

Abstract: Disclosed is a Braille display with protection against the ingress of contaminants. In one embodiment, contaminant protection is provided by a flexible film that is secured beneath the Braille dots of the display. This film both secures the dots and prevents contaminants from coming into contact with pin actuators within the display housing. In another embodiment, ingress protection is provided by air pressure supplied to a plenum located at the base of the dot pins.