Basic study of optimum stimulus mode for finger Braille display

To obtain basic data for designing finger Braille communications, the condi tions of optimizing vibration stimulus on the back of a finger ("finger bac k") have been investigated. The acceleration of vibration stimulating the f inger back is more carefully examined, since this part is sensitive to the acceleration. The effect of a static weight on the finger back, which has b een little known, is also investigated. The experimental results show that the acceleration of vibration of 120 Hz is most sensitive to a finger back, and that a static weight between 100 and 200 gf/cm(2) (depending on the di rection of vibrations) is sensitive to the same position. The time factors of the stimulation, and the most sensitive position on a finger are also in vestigated. (C) 2000 Scripta Technica.