Dual Layer LC Panels for Polarization Control to Display Invisible 2D Code

Abstract

The authors have researched a support system of the reminiscence and life review activity. This support system consists of an interactive tabletop display and interface system. An invisible code is one of the useful technologies. The invisible codes provide us with an operating environment using a pen-like device. However, this technology is applied to the only paper media. The authors think we want to realize an interaction using the invisible code on an electrical media. We propose a method to display invisible codes using LCD panels and to detect a polarized symbol image with a conventional CCD camera.

Keywords:

• 2D code
• group work
• polarized invisible code
• polarized light control
• table-top display

Acknowledgments

This research is partially supported by “Grant-in-Aid for Young Scientists(B)” #20700112 and “Scientific Research (C) (General)” #20500481 from Ministry of Education, Culture, Sports, Science and Technology Japan (MEXT) and also by a grant from the Hyogo Science and Technology Association. A part of this work is done while the author is partially supported by the Hirao Taro Foundation of the Konan University Association for Academic Research, Japan.