Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Application and Design of Scent Display Device for Head-Mounted Display

HMD용 발향장치 설계와 적용

  • Baek Yu, Min Ho (Department of Electonic Engineering, Hoseo University) ;
  • Kim, Min Ku (Department of Electonic Engineering, Hoseo University) ;
  • Keum, Dong-Wi (Department of Electonic Engineering, Hoseo University) ;
  • Kim, Jeong-Do (Department of Electonic Engineering, Hoseo University)
  • 백민호 (호서대학교 전자공학과) ;
  • 김민구 (호서대학교 전자공학과) ;
  • 금동위 (호서대학교 전자공학과) ;
  • 김정도 (호서대학교 전자공학과)
  • Received : 2018.11.12
  • Accepted : 2019.01.28
  • Published : 2019.01.31
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Abstract

Studies to augment emotion and immersion in multimedia content through olfactory stimulation are being increasingly conducted in the past two decades, and a variety of scent devices have been developed. Most of the scent devices are very large and heavy; consequently, they are installed on a table rather than being attached to the Head-mounted Display (HMD). Even if such devices are mounted on the HMD, it is not possible to control the scent density because of the size limitation, and it is not easy to be immersed in the experience because of the noise caused by the scent device. In order for an actual virtual reality or an augmented reality system to work efficiently with the scent device, three conditions - noiseless, a compact design, and concentration control- must be satisfied. In this study, we design a scent device that satisfies these three conditions. By using a miniature piezoelectric pump, a small size scent device is designed so that it can be easily attached to the lower end of the HMD, and hardly any noise is generated. Moreover, it is possible to control the concentration of the scent by controlling the piezoelectric pump using amplitude and frequency.

Keywords

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Fig. 1. Meta Cookie project of Tokyo University

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Fig. 2. Scent display of Tokyo institute of technology (a) Scent blending game, (b) HMD interfaced with scent device

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Fig. 3. Scent mask of FEELREAL

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Fig. 4. A used small air pump

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Fig. 5. Max4990 Driver circuit (a) DIM-Flow Rate Graph , (b) ELFlow Rate Graph

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Fig. 6 Internal structure of Scent device

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Fig. 7. Scent device attached to HMD

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Fig. 8. Structure of piezo liquid pump

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Fig. 9. structure of scent device

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Fig. 10. Driver circuit of piezo liquid pump using MAX14514

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Fig. 11. Virtual reality content used in experiments (a) Scene 1 (b) Scene 2 (c) Scene 3

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Fig. 12. User satisfaction with the first experiment

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Fig. 13. User satisfaction with the second experiment

Table 1. Fluid control using amplitude and frequency (Air Pump)

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Table 2. Fluid control using amplitude and frequency (Liquid Pump)

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Table 3. Sensory evaluation according to scent concentration

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