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.

公开(公告)号：US09825703B2

公开(公告)日：2017-11-21

申请号：US14606662

申请日：2015-01-27

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Jyun-Liang Lai ,  Chueh-Hao Yu ,  Kai-Cheung Juang

IPC: H04B10/116

CPC classification number: H04B10/116

Abstract: An optical communication device and a control method thereof are provided. The optical communication device includes a driving module, a data transmission module, a light emitting module, and a feedback module. The driving module generates a driving current. The data transmission module generates a data current according to a piece of data. The light emitting module is electrically connected to the driving module and the data transmission module directly and emits visible light according to an illuminating current generated by combining the driving current with the data current. The feedback module adjusts a direct current (DC) potential of one of the driving current and the data current so as to make an average intensity of the visible light equal a preset intensity.