JP2019087198A - Settlement system, portable terminal, and settlement method - Google Patents

Abstract

To provide a settlement system that can reduce a time during which each shopper occupies a settlement terminal in settlement processing.SOLUTION: Provided is a settlement system including a portable terminal and a settlement terminal. The portable terminal optically reads a first identifier to acquire a commodity code corresponding to the first identifier, and displays a second identifier corresponding to the commodity code and different from the first identifier. The settlement terminal optically reads the second identifier displayed on display means of the portable terminal to acquire a commodity code, and performs settlement processing on the basis of the commodity code.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a settlement system including a POS (Point Of Sales) terminal or the like, and more particularly to a settlement system, a portable terminal, and a settlement method for inputting and settling a purchased product.

  The labor shortage due to the decline in the labor force is one of the important issues facing Japan in recent years, and it is necessary to carry out work with a small number of workers in Japan in the future.

  Labor shortages are also a problem in the retail industry. In current general POS terminals, the POS terminal occupancy time per shopper is long. Because of this, shoppers can easily make a long queue before the cash register. Increasing the number of POS terminals and increasing the number of cash clerks can be considered as a solution in order to process the cashier queue in a short time, but it is difficult to take this solution due to a shortage of workers .

  Other solutions include semi-self registration and self registration. Here, an operation to input the unit price and the number of items such as barcode reading of an item is referred to as an input operation. In addition, calculation of the total amount based on the input, and operation until receipt of payment by cash, card, etc. shall be referred to as settlement operation. In the case of self-checkout, the shopper performs from the input operation to the settlement operation at the POS terminal. In the case of semi-self-checkout, a cashier clerk usually performs only an input operation on the POS terminal. For the settlement operation, a settlement terminal is installed separately from the POS terminal, and is performed by the shopper.

  In the self cash register and the semi self cash register, the shopper performs part or all of the payment processing. Therefore, the store side can complete more settlement processing in a shorter time with the same number of cashier personnel.

  Patent Document 1 is a document in which the technology related to the present invention is described. In Patent Document 1, a self-checkout terminal and a POS terminal are installed in a store. The self-checkout terminal is a terminal through which the customer inputs the product information of the purchased product, and issues a receipt on which the information of the input purchased product is printed (paragraph 0028 of the same document). Thereafter, the customer brings a receipt issued at the self-checkout terminal, goes to the POS terminal, and delivers the receipt to the person in charge of the POS terminal, and the person in charge takes the receipt by the scanner provided at the POS terminal. The printed two-dimensional code is read (paragraph 0030 of the same document).

JP 2012-190246 A

  According to the solution using semi-self registration and self registration, it is necessary to newly introduce a POS terminal compatible with semi self registration and self registration.

  The present invention has been made in view of such a situation, and the problem to be solved by the present invention is a settlement that can shorten the time for one shopper to occupy the settlement terminal during the settlement process. To provide a system.

  In order to solve the problems described above, the present invention is, as one aspect thereof, a payment system including a portable terminal and a payment terminal, wherein the portable terminal optically reads a first identifier which is an optically readable identifier. A first reading unit for outputting a product code corresponding to the first identifier; and an optically readable identifier corresponding to the product code, the second reading unit being different from the first identifier And a display unit for displaying the image of the second identifier, and the settlement terminal uses the image of the second identifier displayed on the display unit. A settlement process for performing settlement processing based on a second reading unit for optically reading and outputting the product code corresponding to the second identifier, and the product code read by the second reading unit means Provided with, to provide a settlement system.

  According to another aspect of the present invention, there is provided a first reading unit for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier. An identifier conversion unit for outputting a second identifier corresponding to the product code and being an optically readable identifier different from the first identifier, and displaying an image of the second identifier And a display unit.

  Further, according to another aspect of the present invention, a first reading procedure for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier, the product An identifier conversion procedure for outputting a second identifier corresponding to a code, which is an optically readable identifier different from the first identifier, and a display procedure for displaying an image of the second identifier on a display device And a program for causing the processing device of the portable terminal to execute.

  According to another aspect of the present invention, a portable terminal is used to optically read a first identifier, which is an optically readable identifier, to obtain a product code corresponding to the first identifier. Reading step, an identifier conversion step of obtaining an optical readable identifier corresponding to the product code using the mobile terminal, wherein the second identifier is different from the first identifier, using the mobile terminal A display step of displaying an image of the second identifier; optically reading an image of the second identifier displayed on the portable terminal using a settlement terminal; and the product corresponding to the second identifier There is provided a settlement method including a second reading step for obtaining a code, and a settlement processing step for performing settlement processing based on the commodity code read in the second reading step using the settlement terminal.

  According to the present invention, it is possible to omit the time for reading a one-dimensional code from each product in the settlement terminal, and to shorten the occupation time of the settlement terminal per shopper.

It is a block diagram of payment system 1 which is a 1st embodiment of the present invention. It is a figure for demonstrating the operation | movement of the payment system 1. FIG. It is a block diagram of payment system 50 which is a 2nd embodiment of the present invention. It is a figure for demonstrating the operation | movement of the payment system 50. FIG.

  A settlement system 1 according to a first embodiment of the present invention will be described. In the settlement system 1, before the shopper is lined up at the cash register, the one-dimensional code (bar code) of the product is read using the portable terminal 2 of the shopper's own product code corresponding to the one-dimensional code of plural products to be purchased Is converted into one two-dimensional code and displayed. The settlement terminal (POS terminal) reads the displayed two-dimensional code and performs settlement processing.

  The settlement system 1 includes a portable terminal 2, a settlement terminal 3, and a database (DB) 4. The settlement system 1 is used, for example, in a store such as a supermarket or a convenience store to settle a product purchased by a shopper. A product code is assigned to each product in the store as an identifier for identifying the product, and a one-dimensional code representing the product code, a so-called bar code, is attached to the product.

  There is no limitation on the form in which the barcode is attached to the product. For example, the bar code may be printed directly on the product or its package, or a bar code printed sticker may be affixed to the product or its package. Instead of attaching a barcode to the product or the package itself, the product may be displayed on a shelf or the like on which the product is displayed.

  The portable terminal 2 is a portable information processing apparatus. For example, a smartphone, a mobile phone terminal, a PDA (Personal Data Assistant), a tablet, and a laptop computer can be used as the mobile terminal 2, but a smartphone and a tablet are particularly preferable. In the case of a smartphone or a tablet, the portable terminal 2 operates on hardware such as a solid-state imaging device, a display device, and a processor provided in the smartphone and the tablet, and an operating system (OS) such as Android, iOS, and Windows mobile. It is realized as a combination of application software.

  The portable terminal 2 basically assumes the property of a shopper individual, but the store may temporarily lend to the shopper. In the case where the mobile terminal 2 is a shopper's smartphone or tablet, the shopper installs the application software described above in advance.

  The portable terminal 2 includes a one-dimensional code reading unit 21, a two-dimensional code generating unit 22, a display unit 23, an input unit 24, and a control unit 25.

  The one-dimensional code reading unit 21 is provided with a solid-state imaging device such as a charge-coupled device (CCD) image sensor, a complementary metal-oxide-semiconductor (CMOS) image sensor, etc. read. Every time the solid-state image sensor captures a one-dimensional code of a product purchased by a shopper, the one-dimensional code reading unit 21 extracts the product code of the product from the photographed barcode. Further, the one-dimensional code reading unit 21 generates a product specification including a product code based on the extracted product code. The one-dimensional code reading unit 21 adds a corresponding product code to the item description every time the one-dimensional code is read.

  The two-dimensional code generation unit 22 obtains a two-dimensional code corresponding to one or more product codes registered in the product specification, and outputs image information indicating the two-dimensional code. There is no limitation on the type of two-dimensional code. For example, it may be a matrix-type two-dimensional code in which small squares are arranged at four corners, such as QR Code (registered trademark). Alternatively, it may be a stack type two-dimensional code in which a plurality of barcodes are stacked one above the other. If the number of input product codes is large, a plurality of two-dimensional codes are generated.

  The display unit 23 is a display device such as a liquid crystal display device or an OEL (Organic Electro-Luminescence) display device. The display unit 23 displays the latest item details generated by the one-dimensional code reading unit 21. The display unit 23 also displays the two-dimensional code generated by the two-dimensional code generation unit 22.

  The input unit 24 is an input device such as a keyboard and a mouse. In the case of a smartphone or a tablet, the display unit 23 and the input unit 24 are combined to be implemented as a touch panel. The input unit 24 also operates as numeric input means.

  The control unit 25 is a control device that controls each unit of the mobile terminal 2 and includes a processor, a memory, and the like.

  The settlement terminal 3 is, for example, a POS (Point Of Sales) terminal. The settlement terminal 3 is installed at a cash register of a store. The cashier in the store operates the settlement terminal 3 to perform settlement processing, receives the price from the shopper, and delivers the change and the receipt to the shopper. The settlement terminal 3 includes a two-dimensional code reading unit 31 and a settlement processing unit 32. The settlement terminal 3 may be a self cash register or a semi self cash register. In this case, the shopper performs the operation performed by the cashier.

  The two-dimensional code reading unit 31 includes a solid-state imaging device such as a CCD image sensor or a CMOS image sensor, reads the two-dimensional code displayed on the display unit 23 of the portable terminal 2, and extracts one or more product codes.

  The payment processing unit 32 performs payment processing based on the product code output from the two-dimensional code reading unit 31. The settlement processing unit 32 receives the price corresponding to the product code received from the two-dimensional code reading unit 31 from the product master 41 described later, and calculates the total price of the product which the shopper intends to purchase based on the price. . Thereafter, the payment processing unit 32 performs payment by cash, card or the like based on the calculated total amount.

  The database 4 is a database management system that stores the product master 41. The product master 41 is a table in which the product code indicating the product, the product name of the product, the price of the product, the stock quantity of the product, and the like are associated with each other and stored for each product sold by the store. The database 4 and the product master 41 function as storage means for storing a product master in which the product code and the price of the product indicated by the product code are associated.

  The configuration of the payment terminal 3 is a general configuration except that the two-dimensional code reading unit 31 is provided. That is, the payment terminal 3 can be realized by adding, for example, a QR barcode reader as the two-dimensional code reading unit 31 to the POS terminal already installed in the store. Therefore, the settlement terminal 3 can be installed in the store at a relatively low cost based on the existing POS terminal, and the introduction cost can be suppressed.

  An outline of the operation of the payment system 1 will be described. The shopper uses the one-dimensional code reading unit 21 of the portable terminal 2 owned by the shopper to read the one-dimensional code (bar code) of the item for each item to be purchased, and puts it in the shopping basket. The shopper repeats this process until all the products to be purchased are put in the shopping basket. After the one-dimensional code is read by the one-dimensional code reading unit 21 from all the items to be purchased and the items are put into the shopping cart, the shopper performs a predetermined operation on the portable terminal 2. In response to the predetermined operation, the two-dimensional code generation unit 22 of the portable terminal 2 generates a two-dimensional code from the commodity codes of the plurality of read commodities, and displays the two-dimensional code on the display unit 23. The cashier in charge uses the two-dimensional code reading unit 31 of the payment terminal 3 to read the displayed two-dimensional code. The payment processing unit 32 of the payment terminal 3 acquires one or more product codes corresponding to the two-dimensional code. The settlement processing unit 32 of the settlement terminal 3 inquires of the product master 41 of the database 4 about the price of the product based on the acquired product code.

  The operation of the payment system 1 will be described in detail with reference to FIG.

  The shopper selects an item to be purchased from the items displayed in the store, and places the selected item in the shopping cart. When putting the product into the shopping cart, the shopper reads the barcode of the product using the one-dimensional code reading unit 21 of the portable terminal 2. The one-dimensional code reading unit 21 sequentially registers the items obtained by reading the bar code in the item description (step S1). The item specification is a list of item codes indicated by the one-dimensional code read by the one-dimensional code reader 21. When purchasing a plurality of identical products, the bar code may be read for each of the products. Alternatively, the bar code may be read from one product, and then the number may be input through the input unit 24. When stopping the purchase of the product registered in the product description, the shopper performs an operation of deleting the corresponding line from the product description displayed on the display unit 23 through the input unit 24.

  When all the products to be purchased are decided, the shopper performs a predetermined operation via the input unit 24. In response to the predetermined operation, the two-dimensional code generation unit 22 generates a two-dimensional code based on the item specification. The display unit 23 displays the two-dimensional code (step S2). The shopper moves in front of the payment terminal 3 as it is.

  The cashier in charge reads the two-dimensional code displayed on the display unit 23 using the two-dimensional code reading unit 31 (step S3). When the settlement terminal 3 is an unmanned terminal such as a self cash register or a semi self cash register, the shopper performs this operation using the settlement terminal 3.

  The payment processing unit 32 of the payment terminal 3 obtains the price of each product from the product master 41 of the database 4 based on the product code indicated by the two-dimensional code (step S4), and calculates the total price of the entire product to be purchased. , Make a payment (step S5).

  The settlement system 1 has the following effects.

  Generally, when linking data between terminals, wired or wireless communication is often performed between the terminals. However, connecting a mobile terminal owned by a shopper to a store network is not desirable from the viewpoint of security. In addition, in an offline environment such as a business event where the installation of communication facilities is difficult, it is difficult to use a method based on communication. However, the payment system 1 transmits data via optical reading of the two-dimensional code displayed on the display device. Therefore, the above-mentioned security problems do not occur, and can be easily applied to an off-line environment.

  Further, in the settlement system 1, the barcode reading operation of the product can be performed at a place other than the vicinity of the cash register where the settlement terminal 3 is located. For this reason, the settlement terminal 3 does not have to perform the barcode reading operation of the product. The settlement terminal 3 need only perform almost only the settlement process. Since the amount of processing performed by the settlement terminal 3 is reduced, the time for one shopper to occupy the settlement terminal 3 is shortened, and the time for the shopper to wait in front of the settlement terminal 3 can be shortened. Alternatively, the number of payment terminals installed in the store can be reduced, and the number of cashiers required for store operation can be reduced.

  A settlement system 50 according to a second embodiment of the present invention will be described. In the settlement system 1 described above, it is not determined whether or not the product registered by the shopper in the product description matches the product inserted by the shopper in the shopping basket. The settlement system 50 determines whether the two match or not.

  Compared with the above-described settlement system 1 with reference to FIG. 3, in the settlement system 50, the settlement terminal 3A corresponding to the settlement terminal 3 includes the weight scale 33 and the weight comparison unit 34, and the product master 41 stores the It is a table in which the weight of the product is stored in association with each other in addition to the product code of the product, the product name of the product, the price of the product, the number of stocks of the product, etc. Is different.

  The weight scale 33 is a weight scale for measuring the weight of the item which the shopper is going to purchase. The weight comparison unit 34 acquires the weight of each product from the product master 41 based on the product code acquired from the two-dimensional code reading unit 31. Then, the weight comparison unit 34 compares the total weight obtained from the product master 41 with the total weight of the products measured by the weight scale 33. Based on the comparison result, the weight comparison unit 34 determines whether the product registered in the product description by the shopper matches the product that the shopper is trying to purchase. In the case of non-coincidence, the weight comparison unit 34 outputs a message notifying non-coincidence.

  The operation of the payment system 50 will be described with reference to FIG.

  Steps S11 to S14 are the same as steps S1 to S4 described above. Subsequently, the cashier staff uses the weight scale 33 to measure the weight of all items that the shopper intends to purchase (step S15). After measuring the weight of the shopping basket with the product in the shopping basket, the weight of the shopping basket alone may be subtracted. Alternatively, the product may be taken out of the shopping basket, the weight of the product may be measured one by one, and the total may be calculated.

  Next, the weight comparison unit 34 obtains the weight of each product from the product master 41 based on the product code obtained from the two-dimensional code reading unit 31, and calculates the total value thereof (step S16).

  Next, the weight comparison unit 34 compares the total weight of the product to be purchased, which is measured by the weight scale 33, with the total value of the weights of the products acquired from the product master 41 (step S17).

  If the two match, the weight comparison unit 34 determines that the item registered in the item description matches the item brought by the shopper to purchase. In this case, the payment processing unit 32 executes the payment processing as it is. The settlement process is the same as step S5 described above.

  On the other hand, if the two do not match, the weight comparison unit 34 outputs a message notifying the non-match. As an output form of the message, it is conceivable to output as an image or a moving image from a display device (not shown) of the payment terminal 3A, which is outputted as a voice from a speaker (not shown) of the payment terminal 3A. A combination of these may be used. In this case, the payment processing unit 32 does not perform payment processing.

  When the settlement terminal 3A is an unmanned terminal and there is no cashier in charge, the shopper performs the work performed by the cashier in charge.

  As described above, according to the settlement system 50, in addition to the effects of the settlement system 1, the validity of the sales statement can be confirmed by comparing the logical value and the measurement value for the total weight of the purchased product. Play.

  The present invention is not limited to the above first and second embodiments. For example, in the above embodiment, the code read by the mobile terminal 2 is described as a one-dimensional code, and the code displayed by the mobile terminal 2 and read by the payment terminal 3 / 3A is described as a two-dimensional code. However, these codes may be optically readable codes. For example, optical character recognition (OCR) may be performed instead of the one-dimensional code reading unit 21. In this case, instead of the one-dimensional code, human readable characters etc. (Hiragana, katakana, kanji, alphabets, symbols, etc.) are used for the product or the shelf for displaying the product etc. Is presented. The portable terminal 2 mechanically recognizes the presented characters and the like by the OCR. The same applies to a code generated by the two-dimensional code generation unit 22 and read by the two-dimensional code reading unit 31.

  In the first and second embodiments, the portable terminal 2 generates the item description including the item code and displays it on the display unit 23. However, instead of the item description including the item code, Alternatively, a product specification including a product name, a product code, and a product specification including a product name may be generated and displayed. For example, when a table indicating the correspondence between product codes and product names of a part or all of products in a store is stored in advance in a storage device of the portable terminal 2 as a part of application software, and a product specification is generated It is conceivable to generate such item details by referring to this table. If such a product specification is displayed, the shopper can easily grasp the product currently registered in the product specification.

  Some or all of the above embodiments may be described as in the following appendices, but is not limited thereto.

(Supplementary Note 1)
A payment system comprising a portable terminal and a payment terminal
The portable terminal is
First reading means for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier;
Identifier conversion means for outputting a second identifier that is an optically readable identifier corresponding to the product code and different from the first identifier;
And display means for displaying the image of the second identifier,
The settlement terminal is
A second reading unit for optically reading an image of the second identifier displayed on the display unit and outputting the product code corresponding to the second identifier;
A settlement system comprising: settlement processing means for performing settlement processing based on the commodity code read by the second reading means.

(Supplementary Note 2)
The settlement system according to appendix 1, wherein the identifier conversion means outputs one of the second identifiers corresponding to a plurality of the commodity codes.

(Supplementary Note 3)
The portable terminal comprises a number input unit for inputting the number of goods.
The identifier conversion means outputs the second identifier corresponding to the number of goods input through the numeral input means and the goods code output from the first reading means. Payment system described in.

(Supplementary Note 4)
The settlement system according to any one of appendices 1 to 3, wherein the first identifier is a one-dimensional barcode and the second identifier is a two-dimensional barcode.

(Supplementary Note 5)
The settlement system includes storage means for storing a product master in which a product code and a price of a product indicated by the product code are associated.
The settlement system according to any one of appendices 1 to 4, wherein the settlement terminal acquires a price corresponding to the input product code from the storage unit, and performs the settlement process based on the acquired price.

(Supplementary Note 6)
The settlement system includes storage means for storing a product master in which a product code and a weight of a product indicated by the product code are associated.
The settlement terminal comprises a scale.
The settlement terminal acquires, from the storage unit, the weight of the item indicated by the item code, which is input through the second reading unit.
The settlement terminal further includes comparison means for comparing the total weight of one or more items measured with the weighing scale and the total weight of the one or more items obtained from the item master. The settlement system according to any one of appendices 1 to 5.

(Appendix 7)
First reading means for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier;
Identifier conversion means for outputting a second identifier that is an optically readable identifier corresponding to the product code and different from the first identifier;
And a display means for displaying an image of the second identifier.

(Supplementary Note 8)
The portable terminal according to Appendix 7, wherein the identifier conversion unit outputs one of the second identifiers corresponding to a plurality of product codes.

(Appendix 9)
It has numeric input means for entering the number of items,
The identifier conversion means outputs the second identifier corresponding to the number of goods input through the numeral input means and the goods code output from the first reading means. The mobile terminal described in.

(Supplementary Note 10)
The portable terminal according to any one of appendices 7 to 9, wherein the first identifier is a one-dimensional barcode and the second identifier is a two-dimensional barcode.

(Supplementary Note 11)
A first reading procedure for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier.
An identifier conversion procedure that outputs a second identifier that is an optically readable identifier corresponding to the product code and that is different from the first identifier;
A program for causing a processing device of a portable terminal to execute a display procedure for displaying an image of the second identifier on a display device.

(Supplementary Note 12)
The program according to Appendix 11, wherein the identifier conversion procedure outputs one of the second identifiers corresponding to a plurality of product codes.

(Supplementary Note 13)
A program further causing the processing device to execute a number input procedure for inputting the number of goods.
11. The identifier conversion procedure outputs the second identifier corresponding to the number of products input through the number input procedure and the product code output by the first reading procedure. The program described in.

(Supplementary Note 14)
The program according to any one of appendices 11 to 13, wherein the first identifier is a one-dimensional barcode and the second identifier is a two-dimensional barcode.

(Supplementary Note 15)
A first reading step of optically reading a first identifier, which is an optically readable identifier, using a portable terminal to obtain a product code corresponding to the first identifier;
An identifier conversion step of obtaining an optical readable identifier corresponding to the commodity code using the portable terminal, the second identifier being different from the first identifier,
Displaying the image of the second identifier using the mobile terminal;
A second reading step of optically reading the image of the second identifier displayed on the portable terminal using a settlement terminal, and obtaining the product code corresponding to the second identifier;
A settlement method including a settlement processing step of performing settlement processing based on the commodity code read in the second reading step using the settlement terminal.

(Supplementary Note 16)
15. The settlement method according to appendix 15, wherein the identifier conversion step obtains one of the second identifiers corresponding to a plurality of the product codes.

(Supplementary Note 17)
The method further comprises a number input step of inputting the number of goods through the mobile terminal,
15. The identifier conversion step according to Appendix 15 or 16, wherein the second identifier corresponding to the number of articles input in the number input stage and the article code obtained in the first reading stage is determined. Payment Method.

(Appendix 18)
15. The settlement method according to any one of appendixes 15 to 17, wherein the first identifier is a one-dimensional barcode and the second identifier is a two-dimensional barcode.

(Appendix 19)
The settlement process step acquires a price corresponding to a product code from a product master in which a product code and a price of a product indicated by the product code are associated in advance, and performs the payment process based on the acquired price. The settlement method according to any one of Appendixes 15 to 18.

(Supplementary Note 20)
Measuring the weight of one or more whole items,
Obtaining the weight of each of the one or more items from the item master in which the item code and the weight of the item indicated by the item code are associated in advance;
15. Any one of Appendices 15 to 19, further including the step of comparing the measured weight of the entire one or more items with the total of the weight of the one or more items obtained from the item master. Settlement method described.

1, 50 payment system 2 mobile terminal 3, 3A payment terminal 4 database (DB)
21 One-dimensional code reading unit 22 Two-dimensional code generation unit 23 Display unit 24 Input unit 25 Control unit 31 Two-dimensional code reading unit 32 Settlement processing unit 33 Weight scale 34 Weight comparison unit 41 Merchandise master

Claims (10)

A payment system comprising a portable terminal and a payment terminal
The portable terminal is
First reading means for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier;
Identifier conversion means for outputting a second identifier that is an optically readable identifier corresponding to the product code and different from the first identifier;
And display means for displaying the image of the second identifier,
The settlement terminal is
A second reading unit for optically reading an image of the second identifier displayed on the display unit and outputting the product code corresponding to the second identifier;
A settlement system comprising: settlement processing means for performing settlement processing based on the commodity code read by the second reading means.   The settlement system according to claim 1, wherein the identifier conversion means outputs one of the second identifiers corresponding to a plurality of the commodity codes. The portable terminal comprises a number input unit for inputting the number of goods.
The identifier conversion means outputs the second identifier corresponding to the number of goods input through the numeral input means and the goods code outputted by the first reading means. The settlement system according to Item 2.   The payment system according to any one of claims 1 to 3, wherein the first identifier is a one-dimensional barcode and the second identifier is a two-dimensional barcode. The settlement system includes storage means for storing a product master in which a product code and a price of a product indicated by the product code are associated.
The settlement system according to any one of claims 1 to 4, wherein the settlement terminal acquires a price corresponding to the input product code from the storage means, and performs the settlement process based on the acquired price. . The settlement system includes storage means for storing a product master in which a product code and a weight of a product indicated by the product code are associated.
The settlement terminal comprises a scale.
The settlement terminal acquires, from the storage unit, the weight of the item indicated by the item code, which is input through the second reading unit.
The settlement terminal further includes comparison means for comparing the total weight of one or more items measured with the weighing scale and the total weight of the one or more items obtained from the item master. The payment system according to any one of claims 1 to 5, comprising: First reading means for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier;
Identifier conversion means for outputting a second identifier that is an optically readable identifier corresponding to the product code and different from the first identifier;
And a display means for displaying an image of the second identifier.   The mobile terminal according to claim 7, wherein the identifier conversion unit outputs one of the second identifiers corresponding to a plurality of product codes. A first reading procedure for optically reading a first identifier, which is an optically readable identifier, and outputting a product code corresponding to the first identifier.
An identifier conversion procedure that outputs a second identifier that is an optically readable identifier corresponding to the product code and that is different from the first identifier;
A program for causing a processing device of a portable terminal to execute a display procedure for displaying an image of the second identifier on a display device. A first reading step of optically reading a first identifier, which is an optically readable identifier, using a portable terminal to obtain a product code corresponding to the first identifier;
An identifier conversion step of obtaining an optical readable identifier corresponding to the commodity code using the portable terminal, the second identifier being different from the first identifier,
Displaying the image of the second identifier using the mobile terminal;
A second reading step of optically reading the image of the second identifier displayed on the portable terminal using a settlement terminal, and obtaining the product code corresponding to the second identifier;
A settlement method including a settlement processing step of performing settlement processing based on the commodity code read in the second reading step using the settlement terminal.

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