Information code reading system

Patent metadata

Field	Value
Publication number	US-11657244-B2
Application number	US-202017639861-A
Country	US
Kind code	B2
Filing date	Sep 1, 2020
Priority date	Sep 2, 2019
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A system contributing to prevention of unauthorized use of an information code displayed on a screen. In the system, an information code display device cyclically displays a plurality of partial code images on a display screen of a display unit based on a first rule when the first rule is received from a server in response to a first request to the server. Accordingly, an information code reading device captures images of the display screen at imaging intervals according to a second rule which is received from the server by in response to a second request to the server to decode an information code composed of the plurality of images thus captured, according to the second rule.

First claim

What is claimed is:

1. An information code reading system comprising an information code display device, an information code reading device, and a server that can communicate with the information code display device and the information code reading device, wherein
the information code display device includes
a display side communication unit that receives a first rule transmitted from the server in response to a first request to the server,
a partial code image preparation unit that prepares a plurality of types of partial code images when the first rule is received by the display side communication unit, each partial code image being produced as a result of removing part of cells configuring a code area of an information code, on which predetermined information is recorded, from an image of the information code so as to meet the first rule, and

a display unit that cyclically displays the plurality of partial code images prepared by the partial code image preparation unit on a display screen, based on the first rule;
the information code reading device includes
a reading side communication unit that receives a second rule transmitted from the server in response to a second request to the server,
an imaging unit that captures images of the display screen at imaging intervals according to the second rule when the second rule is received by the reading side communication unit,
a combination unit that composes one information code from a plurality of images captured by the imaging unit, based on the second rule, and
a decoding unit that decodes the information code composed by the combination unit; and

the server includes
a setting unit that sets a rule related to display of the partial code images according to time of receiving the first rule or the second rule, and
a server side communication unit that transmits a rule to the information code display device as the first rule when the first request is received from the information code display device, the rule being set by the setting unit according to time of receiving the first request, and transmits a rule to the information code reading device as the second rule when the second request is received from the information code reading device, the rule being set by the setting unit according to time of receiving the second request.

2. An information code reading system comprising an information code display device, an information code reading device, and a server that can communicate with the information code display device and the information code reading device, wherein
the information code display device includes
a display side communication unit that receives a first rule transmitted from the server in response to a first request to the server,
a storage unit that stores a plurality of information codes, and
a display unit that cyclically displays the plurality of information codes on a display screen based on the first rule received by the display side communication unit;

the information code reading device includes
a reading side communication unit that receives a second rule transmitted from the server in response to a second request to the server,
an imaging unit that captures images of the display screen at imaging intervals according to the second rule when the second rule is received by the reading side communication unit,
a decoding unit that performs decoding processing in which an information code is decoded for the plurality of serial images captured by the imaging unit, and
a notification unit that performs predetermined notification in the case where decoding results of decoding the serial images performed by the decoding unit are different from results estimated from the second rule; and

the server includes
a setting unit that sets a rule related to display of information codes according to time of receiving the first rule or the second rule, and
a server side communication unit that transmits a rule to the information code display device as the first rule when the first request is received from the information code display device, the rule being set by the setting unit according to time of receiving the first request, and transmits a rule to the information code reading device as the second rule when the second request is received from the information code reading device, the rule being set by the setting unit according to time of receiving the second request.

3. The information code reading system according to claim 1 , wherein
the first rule includes information related to an expiration period; and
the display side communication unit newly requests the first rule to the server after the lapse of the expiration period included in the first rule after receiving the first rule.

4. The information code reading system according to claim 3 , wherein
the information code display device includes
a determination unit that determines, when receiving the first rule, whether display conditions following the first rule are display conditions that are acceptable to the display unit, and
a production unit that produces a display condition code as an information code when the determination unit determines that the display conditions are not acceptable to the display unit, the information code recording information related to display conditions that are acceptable to the display unit, and specific information that can specify the information code display device;

the display unit displays the display condition code on the display screen when the display condition code is produced by the production unit;
in the information code reading device,
when the display condition code has been decoded by the decoding unit, the reading side communication unit makes the second request including the decoding results for the display condition code; and

in the server,
when the second request including the decoding results for the display condition code is received from the information code reading device, the setting unit sets the first rule and the second rule so as to change display conditions according to the decoding results, and
the server-side communication unit respectively transmits the first rule and the second rule set by the setting unit to the information code display device and the information code reading device.

5. The information code reading system according to claim 1 , wherein
the information code display device includes
a determination unit that determines, when receiving the first rule, whether display conditions following the first rule are display conditions that are acceptable to the display unit, and
a production unit that produces a display condition code as an information code when the determination unit determines that the display conditions are not acceptable to the display unit, the information code recording information related to display conditions that are acceptable to the display unit, and specific information that can specify the information code display device;

the display unit displays the display condition code on the display screen when the display condition code is produced by the production unit;
in the information code reading device,
when the display condition code has been decoded by the decoding unit, the reading side communication unit makes the second request including the decoding results for the display condition code; and

in the server,
when the second request including the decoding results for the display condition code is received from the information code reading device, the setting unit sets the first rule and the second rule so as to change display conditions according to the decoding results, and
the server-side communication unit respectively transmits the first rule and the second rule set by the setting unit to the information code display device and the informa

Assignees

• Denso Wave Inc

Inventors

• Suzuki Tomohito
• Ito Yuichi
• Kagami Ryohei
• Konosu Koji

Classifications

• G06K7/1095

  the scanner comprising adaptations for scanning a record carrier that is displayed on a display-screen or the like · CPC title

• G06K7/1426

  Multi-level bar codes · CPC title

• G06K19/06112

  the marking being simulated using a light source, e.g. a barcode shown on a display or a laser beam with time-varying intensity profile · CPC title

• G06K7/1417 Primary

  2D bar codes · CPC title

• G06K19/06037

  multi-dimensional coding · CPC title