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:
Apr. 20, 2021
Filed:
Jul. 02, 2018
Inter-university Research Institute Corporation Research Organization of Information and Systems, Tokyo, JP;
National University Corporation Hokkaido University, Hokkaido, JP;
Hiromichi Hashizume, Tokyo, JP;
Masanori Sugimoto, Sapporo, JP;
Takayuki Akiyama, Tokyo, JP;
Hayato Kumaki, Sapporo, JP;
Shota Shimada, Sapporo, JP;
Abstract
An information transmitter apparatus for use in an information transmission system is provided, where the information transmission system includes the information transmitter apparatus and an information receiver apparatus. The information transmitter apparatus transmits a surface-shaped visible light signal using a light source, where the visible light signal is modulated according to a modulated signal modulated using a plurality of respective-order carriers different from each other, and the respective-order carriers has a fundamental frequency and multiple frequencies of a frame output signal of a video camera of rolling shutter system provided in an information receiver apparatus. The information receiver apparatus receives the visible light signal using the video camera. The information transmitter apparatus includes a modulator that quadrature-amplitude-modulates the respective-order carriers in accordance with input digital data signal, and inverse-Fourier-transforms modulated carriers to generate the modulated signal.