Author/Authors :
WANG, Yufeng Tsinghua University - Institute of Microelectronics - Tsinghua National Laboratory for Information Science and Technology, China , YANG, Yi Tsinghua University - Institute of Microelectronics - Tsinghua National Laboratory for Information Science and Technology, China , KONG, Xiangming Tsinghua University - Institute of Microelectronics - Tsinghua National Laboratory for Information Science and Technology, China , LIAO, Wenjun Tsinghua University - Institute of Microelectronics - Tsinghua National Laboratory for Information Science and Technology, China , WANG, Ligang Tsinghua University - Institute of Microelectronics - Tsinghua National Laboratory for Information Science and Technology, China , REN, Tianling Tsinghua University - Institute of Microelectronics - Tsinghua National Laboratory for Information Science and Technology, China , LIU, Litian Tsinghua University - Institute of Microelectronics - Tsinghua National Laboratory for Information Science and Technology, China
Abstract :
A handwriting input system was developed using three collinear ultrasonic transducers. These collinear polyvinylidene fluoride (PVDF) transducers were specially designed for the handwriting input system to give a large writeable area with writing in any direction. Driver and detection circuits were developed for the handwriting system. This handwriting input system based on 2-dimensional position tracing has large writeable area (A4 paper), low drive voltage (5 V), and is independent of the handwriting pad or the pen.
Keywords :
collinear transducers , PVDF , driver and detection circuit , handwriting input system
