HAPmini: 2D haptic feedback generation using single actuator device

Area of Science:

• Human-Computer Interaction
• Haptic Technology
• Device Design

Background:

• Touchscreen devices lack rich tactile feedback, limiting interaction fidelity.
• Existing haptic devices can be complex and costly for general users.
• There is a need for accessible haptic devices that enhance touch interaction.

Purpose of the Study:

• To develop and evaluate HAPmini, a novel, low-complexity graspable haptic device.
• To enhance user touch interaction through force and tactile feedback.
• To explore the feasibility of hardware magnetic snap and virtual texture functions for common users.

Main Methods:

• Designed HAPmini with a single solenoid-magnet actuator and simple structure.
• Developed a hardware magnetic snap function for pointing tasks.
• Implemented virtual texture simulation using vibration for five distinct materials.
• Conducted comparative, ABX, and matching tests to evaluate device performance and texture recognition.

Main Results:

• The hardware magnetic snap function significantly improved pointing task performance.
• HAPmini successfully generated five distinguishable virtual textures with high accuracy (97.3% in ABX, 93.3% in matching tests).
• Participants could reliably differentiate between the simulated textures.

Conclusions:

• HAPmini effectively enhances touch interaction usability through its magnetic snap function.
• The device provides novel, previously unavailable texture information on touchscreens via virtual textures.
• HAPmini presents a feasible and effective haptic solution for common users.