An Implementation of the TRON Keyboard

  • Sadao Tachibana
  • Ken Sakamura


Two important objectives of keyboard input method are to gain speed and to lessen the fatigue of operators. The TRON keyboard layout is based on the data of the physical size of hands of Japanese. Firstly, physical placement of keytops which are easy to strike and causes less fatigue was determined using the data. Secondly, character frequencies in real documents was used to decide the final location of each character in the keyboard. In addition, an electronic pen is proposed for figure input.

Oki Electric Industry Co., Ltd. has built a TRON keyboard prototype on the basis of the TRON keyboard specifications. This paper discusses the design of the keyboard that reflects the TRON specifications for its implementation as a product.


Input Device Keyboard Finger’s Reach Electronic Pen 


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  1. [1]
    Ken Sakamura, “Method to Input Japanese Characters in BTRON Environment — Design of TRON Keyboard”, Information Processing Society of Japan, Japanese Documentation Processing Study Group, 7 - 2 (1986)Google Scholar
  2. [2]
    Masaru Nakaseko, “Ergonomic Design of Keyboard”, Human Engineering, Vol. 22, No. 2 (1986)Google Scholar

Copyright information

© Springer-Verlag Tokyo 1987

Authors and Affiliations

  • Sadao Tachibana
    • 1
  • Ken Sakamura
    • 2
  1. 1.Physical Design Department, Engineering Division, Data Processing GroupOki Electric Industry Co., Ltd.TakasakiJapan
  2. 2.Department of Information Science, Faculty of ScienceUniversity of TokyoHongo,TokyoJapan

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