[IEEE 2008 IEEE Interdisciplinary Conf on Portable Info Devices (PORTABLE) - Polytronic 2008 IEEE Conf on Polymers and Adhesives in Microelectronics and Photonics - Garmisch-Partenkirchen, Germany (2008.08.17-2008.08.20)] PORTABLE-POLYTRONIC 2008 - 2nd IEEE International Interdisciplinary Conference on Portable Information Devices and the 2008 7th IEEE Conference on Polymers and Adhesives in Microelectronics and Photonics - Bidirectional optical wireless communications module for portable information terminal