Basic study on suppression of harmful optical stimulation due to the group of large-size displays as advertisement medium in the urban area

在本研究中，我们对一种防止大型高输出数字标牌组可能造成的有害光刺激发生的方法进行了基础研究。我们首次实验制作了能在显示器之间有效通信的光无线通信系统，并通过传输实验对该系统的误码率性能进行了评价。数据传输实验表明，与传统系统相比，该系统可以提高误码率。然后，我们考虑了避免有害光刺激引起的健康损害的发生所必需的信息。此外，我们还设计了一种适合当前信息通信环境的设备配置管理方法和健康损害发生风险评估方法。

In this research, we carried out a basic study for a method for preventing from the occurrence of the harmful optical stimulus of which the large-sized high-output digital signage group has a possibility to cause. We firstly produce experimentally the optical wireless communication system which efficiently communicates between displays, and evaluate the bit error rate (BER) performance of this system by the transmission experiment. As a result of data transmission experiment, we clarified that this system can improve the BER performance compared with a conventional system. Then, we considered about indispensable information for avoiding the occurrence of health impairment which is caused by the harmful optical stimulus. Moreover, we designed a management method including the equipment configuration which fits current circumstance of information and communication and a method for evaluating risk of the occurrence of the health impairment.