| 摘要 |
<p>The invention relates to an electronic pen (500, 600) with pen position detection, comprising a writing rod, at least one electrical power source, at least one digital processing unit, at least one data transmission module, and an inertial positioning sensor system for detecting the position and motion of the electronic pen, and at least one optical sensor (108, 209), wherein the optical sensor (109, 209) is configured for recording and storing image data of at least one surrounding area of the writing rod tip, and the digital processing unit Is configured for creating a mapping of a writing substrate from said recorded image data and for absolute referencing of a first location signal of the electronic pen determined from the inertial positioning sensor system by referencing the determined location signal of the positioning sensor system with a second location signal determined by use of the optical sensor (109, 209) determined from the comparison of stationary features of the surrounding area of the writing rod tip identified in the image data of the current surrounding area of the writing rod tip with stationary features identified in image data of at least one already stored surrounding area of the writing rod and/or identified in a mapping of the writing substrate.</p> |
