公开(公告)号：US11415435B2

公开(公告)日：2022-08-16

申请号：US16917272

申请日：2020-06-30

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Tsan-Huang Chen ,  Yu-Chen Lee ,  Chung-Lin Tseng ,  Jyun-Liang Lai ,  Yi-Ting Wang

IPC: G01D5/12 ,  H03H7/06 ,  H03M1/12

Abstract: An encoder and a signal processing method are disclosed. The method includes: receiving an analog signal, and generating a filtered analog signal by an analog filter according to the input signal and a first frequency indication signal; generating a digital signal by an analog-to-digital converter according to the filtered analog signal; generating a filtered digital signal by a digital filter according to the digital signal and a second frequency indication signal; generating a seventh signal and an eighth signal by a dynamic offset calibration unit according to the filtered digital signal and a period indication signal; and generating a position information by a position detection unit according to the seventh signal and the eighth signal. The first frequency indication signal, the second frequency indication signal and the period indication signal are generated by a frequency generation module according to the filtered analog signal or the digital signal.

公开(公告)号：US10128946B2

公开(公告)日：2018-11-13

申请号：US15394224

申请日：2016-12-29

Applicant: Industrial Technology Research Institute

Inventor： Yu-Chen Lee ,  Chueh-Hao Yu ,  Jyun-Liang Lai

IPC: H04B10/00 ,  H04B10/116 ,  H04B10/50

Abstract: A visible light communication device includes a light-emitting unit, a switch-mode light-emitting diode (LED) driver, a synthesizing circuit, and a path selection circuit. The switch-mode LED driver provides a driving current for driving the light-emitting unit. The synthesizing circuit synthesizes a data signal and a dimming signal to form a synthesized signal. According to a data frequency and a dimming ratio obtained from one or more path selection information, the path selection circuit selects to turn on a bypass current modulation unit to inject the synthesized signal to the bypass current modulation unit along one path and the bypass current modulation unit controls the light-emitting unit according to the synthesized signal, or selects to inject the synthesized signal to the switch-mode LED driver along another path and the switch-mode LED driver controls the light-emitting unit according to the synthesized signal.