The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 2019
Filed:
Jun. 05, 2018
Chi Hsiang Optics Co., Ltd., Zhubei, Hsinchu County, TW;
Po Hung Yao, Hsinchu, TW;
CHI HSIANG OPTICS CO., LTD., Zhubei, TW;
Abstract
A user input system includes an optical wave plate assembly a reading device. The optical wave plate assembly includes a phase wave plate and a phase retardation layer. The phase retardation layer is disposed on at least one surface of the phase wave plate. The phase retardation layer includes a code pattern with coordinate information. The optical wave plate assembly converts incident light into at least one of a first polarized light having a first polarization state and a second polarized light having a second polarization state through the phase retardation layer. The first polarization state and the second polarization state are different. The reading device is operated on the optical wave plate assembly for sensing presence or absence of the first polarized light, analyzing a distribution of a change in brightness of the code pattern, and performing a decoding to obtain the coordinate information.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile