How does hand size influence the design of rollable displays and grip comfort?

Hand size plays a crucial role in determining the most comfortable grip on a rollable display. The study categorized participants into short, medium, and large hand length groups, observing how each group interacted with different device dimensions. The research found that the grip area and comfort ratings varied across these hand size categories, influencing the recommended bezel width and device thickness to ensure a comfortable and natural grip posture for all users. For instance, a thicker device of 10 mm was found to provide better grip comfort, regardless of hand length.

What device thickness is recommended for rollable displays, and why?

The study suggests that a device thickness of 10 mm is preferable for rollable displays to ensure high grip comfort. This recommendation stems from observations that a thicker device allows for a more natural and less strained grip posture. This, in turn, enhances the overall user experience by reducing the effort required to unroll and roll the display and promoting a more comfortable interaction with the device.

What methodology was used to assess grip comfort on rollable displays?

The study employed a mixed factorial design that involved a diverse group of participants, focusing on hand length and device thickness as key variables. The participants were asked to repeatedly unroll and roll prototypes of varying thicknesses while researchers measured the grip area using a grid image attached to the bezel. In addition, the participants rated their grip comfort on a 100mm Visual Analogue Scale, providing subjective feedback. This combination of quantitative measurements and qualitative feedback allowed researchers to correlate hand size, device thickness, and grip comfort effectively.

What bezel width is advisable for rollable displays to enhance user experience?

According to the study, a bezel width of at least 20 mm is advisable for rollable displays, regardless of hand length. This recommendation is based on the observation that a wider bezel provides more surface area for the user to grip, which contributes to a more stable and comfortable experience while handling the device. By incorporating this design element, manufacturers can improve the ergonomics and overall user satisfaction of their rollable display products.

Hands interacting with a rollable display, highlighting ergonomic design.

Rollable Displays: How Ergonomics Can Improve Your Grip and Comfort

Q: What are the key ergonomic factors that impact the usability of rollable displays?

The usability of rollable displays is significantly influenced by ergonomic factors such as hand size and device thickness. These elements directly affect grip comfort when unrolling and rolling the device. A recent study explored how different hand sizes interact with varying device dimensions to determine optimal design parameters for a more user-friendly experience. Specifically, the study examined the effects of hand length categorized as short, medium, and large, as well as device thickness variations including thin, medium, and thick versions.

Theo Raines in Tech & Innovation December 2025 • 4 min read.

"Discover how hand size and device thickness impact grip comfort on rollable displays, and what designers can do to create more ergonomic devices."

In an era where technology constantly evolves, rollable displays represent the next frontier in portable devices. As we transition from flat screens to flexible ones, understanding the ergonomics of these new gadgets becomes crucial. After all, a device's usability hinges not only on its innovative features but also on how comfortable it is to hold and use.

The shift towards rollable displays introduces unique challenges. Unlike traditional devices, rollable screens require a pulling motion to unroll, placing specific demands on the user's grip. The force exerted on the device's edges, or bezels, must be carefully calibrated to avoid strain and ensure a smooth user experience. This means that designers need to consider factors like hand size and device thickness to optimize grip comfort.

A recent study delved into these ergonomic considerations, seeking to determine the ideal bezel width and device thickness for rollable displays. By examining how different hand sizes interact with varying device dimensions, the research offers valuable insights for designing more user-friendly technology.

Understanding the Ergonomic Impact of Hand Size and Device Thickness

Hands interacting with a rollable display, highlighting ergonomic design.

The study involved thirty young adults with an average age of 22.1 years. Participants were selected from a university population, ensuring they were right-handed and free from musculoskeletal issues in their upper limbs. The research employed a mixed factorial design, focusing on hand length and device thickness as key variables.

To assess the impact of these variables, the study used three different hand length categories: short (≤162.5 mm), medium (174.6–177.3 mm), and large (≥189.4 mm). Device thickness was also varied, with prototypes measuring 2 mm (thin), 6 mm (medium), and 10 mm (thick). These prototypes were constructed from Acrylonitrile Butadiene Styrene (ABS) plastic panels, incorporating a paper screen, roller, and spring mechanism.

Hand Length: The study categorized participants into short, medium, and long hand length groups to see how grip varied across different hand sizes.
Device Thickness: Prototypes were created in thin, medium, and thick versions to evaluate how device size affected grip comfort.
Grip Area Measurement: A grid image was attached to the bezel to measure the area involved in gripping, providing quantitative data on hand placement.
Comfort Rating: Participants rated the comfort of their grip on a 100mm Visual Analogue Scale, offering subjective feedback on device ergonomics.

Participants were asked to unroll and roll the prototypes repeatedly to find their most comfortable grip. During this process, the grip area was photographed from multiple angles, and participants rated the comfort of each hand on a visual analogue scale. This method allowed researchers to correlate hand size, device thickness, and grip comfort, providing a comprehensive understanding of the ergonomic landscape.

Key Findings and Design Recommendations

The results of the study indicated that, regardless of hand length, a bezel width of at least 20 mm is advisable for rollable displays. Furthermore, a device thickness of 10 mm is preferable to ensure high grip comfort. These findings suggest that a thicker device provides a more natural and less strained grip posture, which translates to enhanced user experience. By integrating these ergonomic considerations into the design process, manufacturers can create rollable displays that are not only innovative but also comfortable and user-friendly.