Braille sheet display

Takamiya, M., Sekitani, T., Kato, Y, Kawaguchi, H., Someya, T., and Sakurai, T., An organic FET SRAM with back gate to increase static noise margin and its application to braille sheet display, IEEE J. Solid-State Circuits, 42, 93-100, 2007. 

Figure 6.9 Images of a Braille display (a) the flexible Braille sheet display using IPMC actuator array (b) the device assembly (c) circuit diagram of the Braille sheet display (Reprinted with permission from Kato, Y., Sekitani, T., Takamiya, M. et al. Sheet-Type Braille Displays by Integrating Organic Field-Effect Transistors and Polymeric Actuators, IEEE Trans on Electron. Devices, 54 (2), 202-9. Copyright (2007) IEEE).

This result shows that the generating force and the displacement of this device are sufficient to facilitate reading by the visually impaired. Further, it demonstrates the feasibility of this design, which integrates organic transistors and the IPMC actuators, for realizing Braille sheet displays. 

Figure 6.11a shows one of the Braille dots moving upwards and downwards. Four Braille letters displayed by the present device are also shown in Figure 6.1 lb. Someya et al. tested the readability of the sheet-like Braille display using the IPMC. Four visually impaired individuals participated in the reading tests. When the operator input Na and Wa in the Japanese Braille format, all four individuals were able to recognize the letters correctly. 

Y. Kato, T. Sekitani, M. Takamiya, M. Doi, K. Asaka, T. Sakurai, and T. Someya. Sheet-type Braille displays by integrating organic field-effect transistors and polymeric actuators. leee Transactions on Electron Devices, 54(2) 202-209, Feb 2007. 

Finally, a soft and smart device is fabricated by integrating the IPMC actuator with control and senor units. Recently, organic transistor control and sensor technologies have been developed. Hence, all organic, flexible electromechanical devices can be constructed using the IPMC and an organic transistor. In this chapter, such an example is described as a sheet-type Braille display. 

Kato, Y., Sekitani, T., Takamiya, M., et al. (2007) Sheet-Type Braille Displays by Integrating Organic Field-Effect Transistors and Polymeric Actuators, IEEE Trans.Electron Devices, 54, 202-209. 

Fig. 3 Sheet-type Braille display based on the IPMC actuators (a) photograph of the Braille display, (b) photograph of one Braille cell eomposed of six dots attached with IPMC actuator films, (c) a cross-sectional illustration of one Braille dot The IPMC actuator is driven by an organic transistor. (Reproduced irom Kato et al. 2007)...

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