| 摘要 |
<p>A stylus touch sensor and an inexpensive, battery free, wireless backscatter stylus, the stylus touch sensor including a host radio frequency (RF) antenna for generating a magnetic field, an electrode grid for detecting finger touches, and a stylus reader circuit for detecting a signal from a backscatter stylus, and the backscatter stylus having a first circuit for using the magnetic field to generate an electrical current for powering the backscatter stylus, and a second circuit for generating a backscatter signal that is detectable by the stylus reader circuit.</p> |
