INFRARED-REFLECTIVE-PATTERN-PRINTED TRANSPARENT SHEET

摘要

PROBLEM TO BE SOLVED: To provide an infrared-reflective-pattern-printed transparent sheet that implements a wide reading angle and thus increased reading performance.

SOLUTION: The transparent sheet 1 is printed with an infrared-reflective transparent pattern on a surface of a transparent substrate. The transparent ink that forms the transparent pattern includes an infrared-reflective material. The transparent pattern enables an input terminal capable of radiating and detecting infrared rays to read infrared reflection patterns and provide position information about the input terminal on the transparent sheet. The infrared-reflective material is made flakes by cutting or grinding of a liquid crystal film including a liquid crystal material having a fixed cholesteric structure having wavelength-selective reflectivity to the infrared region of wavelengths.

COPYRIGHT: (C)2009,JPO&INPIT