Assistive Technology Focus: Braille Display Devices

One of the best aspects of working in the digital accessibility field is learning about the innovative tools that enable users with disabilities to access and understand content they would otherwise be unable to experience.

Assistive technology (AT) enables individuals with disabilities to access computers, electronic devices, and the web using alternative or additional input and output methods. Examples of AT include a screen reader, the keyboard, and switch devices. 

Braille display devices are fascinating, both in their complexity and range of uses. These devices translate all of the on-screen text into braille, so users who are deaf, blind, low vision, or a combination can use their sense of touch to read the information from their computer or device. Many of these devices also have a braille keyboard, which means that users are able to “type” in text similar to a computer keyboard or other input devices.

The braille output device is one of the only ways people who are deafblind can access the web and other digital content, as they may not be able to see or hear the content, but they can feel it. It’s amazing to watch the pins rise up from the terminal, allowing users to independently access the information that users without disabilities easily experience every day.

There are 3 main types of braille display devices:

1. Stand-alone braille display:  connects to another device (e.g. computer) to produce raised braille dots and “refresh” as the text content changes.
2. Notetakers: these sophisticated devices do much more than take notes, they stream music, read e-books aloud and are compatible with many applications. 
3. Smart display device: these are a combination of stand-alone displays and notetakers. They are often smaller, and are more compatible with utility functions–like device clocks and electronic document

Boundless Assistive Technologies, Freedom Scientific, and Humanware are among the many companies that create braille displays, portable smart displays, and notetakers. The American Foundation for the Blind also has plentiful resources and recommendations on these fantastic devices.

Given the complexity of these devices, most are only able to display 80 characters at a time, which means users cannot read at a speedy rate.

Fortunately, improvements are underway. The California Institute of Technology is exploring electroactive polymers (EAPs) as a potential material that could enhance these braille displays and potentially translate more dynamic content, such as graphs and maps. See what we mean when we say “complex?”