Patent ID: 6041284
Filing Date: 2000-03-21
Classification: G06F,Y10S

Abstract:
A coordinate determining apparatus, comprising:a vibration transmission plate having anisotropic properties such that vibrations from a vibration generation source applied to said vibration transmission plate propagate through said vibration transmission plate with differing vibration transmission velocities depending on a direction of transmission of vibration;a plurality of vibration detection means for detecting vibrations transmitted through said vibration transmission plate; anddetermination means for determining coordinates of the vibration generation source by measuring time periods of propagation of vibrations through said vibration transmission plate from the vibration generation source to one or more of said vibration detection means,wherein said vibration transmission plate and said plurality of vibration detection means are provided such that bisectors of angles made by two line segments each connecting two opposing vibration detection means from among the plurality of vibration detection means coincide with orthogonal axes of anisotropy of said vibration transmission plate.