Evaluation of Information Presentation Methods for a Wearable Braille Display

  • Jung, Ki-Hyo (School of Industrial Engineering, University of Ulsan) ;
  • Lee, Min-Jeong (Mobile Handset R&D Center, LG Electronics) ;
  • Chang, Joon-Ho (Department of Industrial and Manufacturing Engineering, Pennsylvania State University) ;
  • You, Hee-Cheon (Division of Mechanical and Industrial Engineering, Pohang University of Science and Technology)
  • Received : 2011.02.07
  • Accepted : 2011.10.11
  • Published : 2011.12.31


Objective: The present study evaluated information presentation methods applicable to a wearable Braille display in terms of performance and satisfaction measures. Background: A Braille display wearable at a finger can improve accessibility of information for the blind by presenting information in real time. Method: A Braille display with six pins operated by DC servomotors was developed to simulate four information presentation methods(active, stationary, simultaneous, and sequential methods). An evaluation experiment was conducted with 16 participants(8 normal and 8 blind participants) by using three objective measures(reaction time, RT, unit: sec; recognition time, CT, unit: sec; correct response percentage, CP) and two subjective measures(overall satisfaction, OS; perception easiness, PE) with a 7-point scale. Results: The average RTs and CTs of the active and stationary methods were significantly shorter than those of the simultaneous and sequential methods for the blind participants. Also, the average CPs, OSs, and PEs of the active and sequential methods were significantly higher than those of the stationary and simultaneous methods. Conclusion: The active and sequential methods were preferred to the other methods for the blind. Application: The performance characteristics identified in the present study for the four braille display methods can be utilized to develop an effective wearable Braille display system.



Supported by : National Research Foundation of Korea(NRF)


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