TactiBlink represents an innovative foray into the realm of eyes- and hands-free user interface. The device can be used simultaneously as an input and output surface. It is designed as a interface where users can issue commands to devices or systems through the simple of voluntary blinking, and informs users the successful implementation of the blink-initiated commands through tactile feedback.
The idea of TactiBlink stems from the common wish to be more efficient in our busy lives—imagining ourselves with metaphorical multiple arms and extraordinary multitasking abilities. In moments when our hands and eyes are occupied or our focus is intensely directed elsewhere, how can we still send and receive signals effectively? This led me to ponder over a more private, subtle, and integrated method of interaction that doesn't interfere with normal behavior yet fulfills the criteria of being hands-free and eyes-free.
The concept of TactiBlink was born from this contemplation. It’s a unique approach that aligns with our natural actions, offering an unobtrusive yet effective way to interact with technology, especially in situations demanding our undivided attention or discretion.
Considering the feasibility of detection, I choose to monitor the electrical activity of the muscle by using MyoWare 2.0 Muscle sensor.
A voluntary blink involves the conscious use of the Orbicularis Oculi muscle. However, it also engages the Frontalis and Temporalis muscles, making it a part of facial expressions2. Thus, the key muscle groups in voluntary blinking are the Orbicularis Oculi, Frontalis Muscle, and Temporalis Muscle.
It has been observed and tested 12 individuals that most individuals(10) can blink their left or right eye voluntary and separately, as well as both eyes simultaneously.
For initiating a request, users can perform a voluntary blink. To avoid behavioral confusion, we hypothesized there are three distinct digital signals can be generated by two MyoWare sensor through voluntary blinking: blinking the left eye(a), the right eye(b), and both eyes simultaneously(c). This approach offers a simple yet effective way to issue commands without the need for verbal or manual interaction.
To provide clear haptic feedback for the blinking signals, a vibration motor was also installed near the temporalis muscle. Different signals trigger different vibration waveforms, offering varied haptic feedback corresponding to the specific blink-initiated command. This feature enhances the user experience by providing immediate and discernible confirmation of the system's response to their blinking commands, making the interaction intuitive and efficient.
The project enables hands-free and eyes-free interaction with technology, allowing users to multitask efficiently. Activities like washing dishes, working, or driving can be combined with tasks like answering calls or playing music, all controlled by voluntary blinking. This approach not only boosts multitasking but also offers a private interaction experience.
I've developed a music interface to demonstrate TactiBlink, illustrating how users can control music - play, switch tracks, pause - simply through blinking. This shows TactiBlink's potential in daily activities, making listening to music interactive without distracting from other tasks. It represents a new, intuitive method of human-computer interaction, enhancing technology accessibility in everyday life.
TactiBlink
Acrylic, MyoWare Sensor, Arduino.
2023
In conclusion, TactiBlink is an innovative approach that leverages targeted muscle group monitoring and haptic response mechanisms, enabling a nuanced, hands-free, and eyes-free method of interfacing with technology through micro-actions while confronting the intricacies of personalization and ecological sustainability.
1. McMonnies, C. W. (2020). The clinical and experimental significance of blinking behavior. Journal of Optometry, 13(2), 74–80. https://doi.org/10.1016/j.optom.2019.09.002
2. Professional, C. C. M. (n.d.). Facial muscles. Cleveland Clinic. https://my.clevelandclinic.org/health/body/21672-facial-muscles
