Information communication method

• US 10,523,876 B2
• Filed: 04/10/2019
• Issued: 12/31/2019
• Est. Priority Date: 12/27/2012
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Inventors: Oshima, Mitsuaki, Nakanishi, Koji, Aoyama, Hideki, Fuchigami, Ikuo, Shin, Hidehiko, Mukai, Tsutomu, Matsushita, Yosuke, Iida, Shigehiro, Yamada, Kazunori
• Primary Examiner(s): Dobson, Daniel G
• Application Number:
  US16/380,053
• Publication Number:
  US 20190297243A1
• Time in Patent Office: 265 Days
• CPC Class Codes: H04B 10/116 Visible light communication
• CPC Class Codes: H04B 10/516 Details of coding or modulation
• CPC Class Codes: H04N 23/73 by influencing the exposure time

Abstract

An information communication method obtains information from a subject using a terminal device that includes an image sensor having a plurality of exposure lines. The method includes setting an exposure time of the image sensor so that, in an image obtained by capturing the subject by the image sensor, a bright line corresponding to each of the plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject. The method also includes obtaining a bright line image by capturing the subject that changes in luminance by the image sensor with the set exposure time, and obtaining identification information of the subject. An exposure time of each of the plurality of exposure lines partially overlaps with an exposure time of an adjacent one of the plurality of exposure lines, and the subject includes a first area and a second area.

Claims

1. An information communication method for obtaining identification information from a subject using a terminal device that includes an image sensor, the information communication method comprising:

setting an exposure time of the image sensor having a plurality of exposure lines so that, in an image obtained by capturing the subject by the image sensor, a bright line corresponding to each of the plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject;

obtaining a bright line image including a plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time; and

obtaining the identification information of the subject, by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image,

wherein the subject includes a first area and a second area, the first area transmits the identification information by change in luminance, and the second area does not transmit the identification information by change in luminance,

wherein the first area of the subject has a first rectangular shape and the second area of the subject has a second rectangular shape, and

wherein the first rectangular shape is aligned in series with and adjacent to the second rectangular shape.

2. The information communication method according to claim 1,

wherein the second area keeps a predetermined luminance.

3. The information communication method according to claim 1,

wherein the first area is adjacent to the second area along a longitudinal direction.

4. The information communication method according to claim 3,

wherein the subject further includes a third area, and

wherein the third area transmits another identification information by change in luminance, the third area has a rectangular shape, and the third area is adjacent to the second area along the longitudinal direction.

5. The information communication method according to claim 1,

wherein the set exposure time is smaller than or equal to 20 times of a luminance change period of the subject.

7. The information communication method according to claim 1,

wherein the first rectangular shape and the second rectangular shape are adjacent on each short side.

6. The information communication system includes a subject and an information communication device for obtaining identification information from the subject, the information communication device including a processor and an image sensor, the processor executes operations comprising:

setting an exposure time of the image sensor having a plurality of exposure lines so that, in an image obtained by capturing the subject by the image sensor, a bright line corresponding to each of the plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject;

obtaining a bright line image including a plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time; and

obtaining the identification information of the subject, by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image, and

wherein the subject includes a first area and a second area, the first area transmits the identification information by change in luminance, and the second area does not transmit the identification information by change in luminance,

wherein the first area of the subject has a first rectangular shape and the second area of the subject has a second rectangular shape, and

wherein the first rectangular shape is aligned in series with and adjacent to the second rectangular shape.

8. An information communication method for obtaining identification information from a subject using a terminal device that includes an image sensor, the information communication method comprising:

setting an exposure time of the image sensor having a plurality of exposure lines so that, in an image obtained by capturing the subject by the image sensor, a bright line corresponding to each of the plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject;

obtaining a bright line image including a plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time; and

obtaining the identification information of the subject, by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image, and

wherein the subject includes a first area and a second area, the first area transmits the identification information by change in luminance, and the second area does not transmit the identification information by change in luminance,

wherein the first area of the subject has a first rectangular shape and the second area of the subject has a second rectangular shape, and

wherein the first rectangular shape is aligned in a linear alignment with and adjacent to the second rectangular shape.