Refreshable Tactile Displays for Accessible Data Visualisation

TL;DR

RTDs are poised to transform BLV access to graphics by offering affordable, refreshable tactile displays that can store and rapidly present many graphics. The paper gathers perspectives from four key stakeholders to identify potential uses, advantages, and needs, and to outline how the data visualization community can contribute. It highlights the shift toward user-created, dynamic tactile graphics, the necessity of new RTD-specific design guidelines, and the role of co-design in ensuring beneficial adoption. The findings underscore RTDs' potential for real-time data visualization in fixed locations such as schools and workplaces, and call for collaboration between visualization researchers, device manufacturers, and accessibility practitioners.

Abstract

Refreshable tactile displays (RTDs) are predicted to soon become a viable option for the provision of accessible graphics for people who are blind or have low vision (BLV). This new technology for the tactile display of braille and graphics, usually using raised pins, makes it easier to generate and access a large number of graphics. However, it differs from existing tactile graphics in terms of scale, height and fidelity. Here, we share the perspectives of four key stakeholders -- blind touch readers, vision specialist teachers, accessible format producers and assistive technology providers -- to explore the potential uses, advantages and needs relating to the introduction of RTDs. We also provide advice on what role the data visualisation community can take to help ensure that people who are BLV are best able to benefit from the introduction of affordable RTDs.

Figures (1)

• Figure 1: Pixelated heat map for display on an RTD (left) and the heat map displayed on a Graphiti RTD with variable pin heights (right)