A Ubiquitous Optical Device Collectively Controlled with a Projector


Illumination decorated with Light Emitting Diodes (LEDs) increases its expressive power by technological advances in lighting devices. However, the behavior of conventional illumination is limited to simple patterns such as repeated blinking. In addition, it is difficult to realize expressing large figures with many LEDs’ cooperation and synchronization due to the difficulty in identification of each device. In response to this problem, we construct a ubiquitous optical device collectively controlled with a projector, which has an LED, an optical sensor, and a microcomputer to react to the light illuminated from a projector. Moreover, it has functions to adjust the threshold by itself and to recognize optical commands, which are required for collective control. We discuss effectiveness of our proposed device based on several performance studies and field tests done at actual events.


Nakata, M., Kodama, K., Fujita, N., Takegawa, Y., Terada T., Tsukamoto, M., Hosomi, S., and Nishio, S., “Design and lmplementation of a Ubiquitous Optical Device Controlled with a Projector,” Proc. of the 6th International Conference on Advances in Mobile Computing and Multimedia (MoMM 2008), pp. 130–135 (Nov. 2008).