Patent ID: 9019412
Filing Date: 2015-04-28
Classification: H04B,H04N,H04W

Abstract:
1. An information communication method that selects between a visible light communication mode, in which information is obtained from a subject using an image sensor having a plurality of exposure lines, and a normal imaging mode, the information communication method comprising: obtaining first image data by image capture with a first exposure time in the normal imaging mode by sequentially starting exposure of each of the exposure lines of the image sensor at different times and starting exposure of a next one of the exposure lines before exposure of a current one of the exposure lines is complete; and obtaining second image data by image capture with a second exposure time in the visible light communication mode by sequentially starting exposure of each of the exposure lines of the image sensor at different times and starting exposure of a next one of the exposure lines before exposure of a current one of the exposure lines is complete, and obtaining the information by demodulating data specified by a direction in a pattern of a bright line appearing in the second image data and corresponding to the exposure lines that is substantially perpendicular to the exposure lines, the second exposure time being shorter than the first exposure time, wherein in the visible light communication mode, the second image data is obtained by capturing light emitted from the subject and spread by an optical system.