JP7415349B2 - Electronic devices, management systems, and display methods - Google Patents

Description

The present invention relates to an electronic device, a management system, and a display method.

In recent years, electronic devices using RFID (Radio Frequency Identification) have been widely used (see, for example, Patent Document 1). Moreover, among such electronic devices, there are known ones that are equipped with a display function for displaying characters and images on a display section such as electronic paper.

JP2017-215837A

By the way, in the above-mentioned electronic device, when displaying characters or images on the display unit, display information for displaying the characters or images is received from a host device such as a reader/writer via wireless communication, and the received display Text and images are displayed on the display unit based on the information. However, in the above-mentioned electronic devices, when displaying a plurality of characters or images, the amount of display information to be transmitted increases, making it difficult to efficiently process a large amount of electronic devices.

The present invention was made to solve the above problems, and its purpose is to provide an electronic device, a management system, and a display method that can reduce the amount of information transmitted when displaying information.

In order to solve the above problem, one aspect of the present invention includes a display unit that displays a display having non-volatile memory, and an image size that is an integral multiple of a predetermined unit size, and an image that can be displayed on the display unit. an image storage unit that stores data in advance; a wireless communication unit that communicates with a higher-level device via wireless communication; and a display request that the wireless communication unit receives from the higher-level device via the wireless communication; image designation information that specifies the image data stored in the storage unit; and the predetermined unit size , which is a plurality of dots and is expressed based on a number that is an integral multiple of the predetermined unit size, which is a multiple of eight dots. In response to a display request that includes compressing the vertical size and horizontal size of the image data using a unit size, and aspect ratio information that combines the compressed vertical size and horizontal size into one piece of information, based on the image specifying information. The image data designated by the image data is acquired from the image storage unit as the image data with the image size based on the aspect ratio information, and the acquired image data is used as an image previously displayed from the reference position of the display unit. The electronic device is characterized by comprising a processing section that causes the display section to display a display start position at a position sequentially shifted by a size of .

Further, one aspect of the present invention is arranged with the electronic device described above for each step, and when the electronic device passes through the step, transmits the display request to change the display of the display unit to the display unit. This management system is characterized by comprising a plurality of reader/writer devices, which are the above-mentioned higher-level devices, and which are changed according to the process.

Further, one aspect of the present invention provides a display unit that displays a display having a nonvolatile memory property, and an image that has an image size that is an integral multiple of a predetermined unit size and that stores in advance image data that can be displayed on the display unit. A display method for an electronic device comprising a storage unit and a wireless communication unit that communicates with a host device by wireless communication, the wireless communication unit specifying the image data stored in the image storage unit. The vertical size and horizontal size of the image data are determined based on the image specification information and the predetermined unit size , which is a plurality of dots and is expressed based on a number that is an integral multiple of the predetermined unit size, which is a multiple of 8 dots. a receiving step of compressing the size and receiving a display request including aspect ratio information in which the compressed vertical size and the horizontal size are combined into one information from the host device through the wireless communication; In response to the display request received in the receiving step, the image data designated based on the image designation information is acquired from the image storage unit as the image data having an image size based on the aspect ratio information; A display method comprising the step of displaying the image data on the display section, with a display start position being a position that is sequentially shifted by the size of a previously displayed image from a reference position on the display section. It is.

According to the present invention, it is possible to reduce the amount of information transmitted when displaying.

FIG. 1 is a block diagram illustrating an example of an electronic device according to a first embodiment. FIG. 3 is a diagram showing an example of display on a display unit in the first embodiment. FIG. 3 is a diagram showing an example of data in an image storage unit in the first embodiment. It is a figure showing the example of data of the display history storage part in a 1st embodiment. FIG. 3 is a diagram showing an example of setting aspect ratio information in the first embodiment. 5 is a flowchart illustrating an example of display command processing of the electronic device according to the first embodiment. It is a figure showing an example of display processing on a display part in a 1st embodiment. FIG. 2 is a block diagram illustrating an example of a production management system according to a second embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, an electronic device, a management system, and a display method according to one embodiment of the present invention will be described with reference to the drawings.

[First embodiment]
FIG. 1 is a block diagram showing an example of an electronic device 1 according to this embodiment.
As shown in FIG. 1, the electronic device 1 includes a wireless communication section 11, a display section 12, a storage section 13, and a control section 14.

The electronic device 1 is, for example, an electronic device such as an RFID tag, a contactless IC card, or an edge device. Executes processing (command processing) according to the received command. Then, the electronic device 1 transmits (reply) a response (processing response) that is the execution result of the command processing to the reader/writer 2 via the wireless communication unit 11.

The reader/writer 2 is an example of a host device, includes a wireless communication unit (not shown), transmits commands through wireless communication, and causes the electronic device 1 to execute processing according to the commands. For example, the reader/writer 2 transmits a display command to the electronic device 1 and causes the display unit 12 of the electronic device 1 to display various images.

The wireless communication unit 11 communicates with the reader/writer 2 (upper-level device) by wireless communication such as NFC (Near Field Communication), for example. The wireless communication unit 11 receives various commands from the reader/writer 2 via wireless communication, and outputs the received commands to the control unit 14, which will be described later. The wireless communication unit 11 also transmits responses to various command processes processed by the control unit 14 to the reader/writer 2 via wireless communication. Note that the wireless communication unit 11 may receive power for operating the electronic device 1 from the reader/writer 2 by wireless power supply.

The display unit 12 is, for example, electronic paper, and performs display with non-volatile memory properties. The display unit 12 displays a plurality of images on the screen G1, for example, as shown in FIG.
FIG. 2 is a diagram showing an example of display on the display unit 12 in this embodiment.
In FIG. 2, the screen size (display size) of the display unit 12 is, for example, a horizontal size X of 360 dots (dots) and a vertical size Y of 240 dots (360 dots×240 dots). The example shown in FIG. 2 is an example in which images A to D are displayed on the display unit 12.

Here, image A has a horizontal size of 288 dots and a vertical size of 48 dots (288 dots x 48 dots), and image B has a horizontal size of 96 dots and a vertical size of 96 dots (96 dots x 96 dots). Furthermore, the image C has a horizontal size of 96 dots and a vertical size of 96 dots (96 dots x 96 dots), and the image D has a horizontal size of 168 dots and a vertical size of 168 dots (168 dots x 168 dots).
Note that the display unit 12 includes a driver unit (not shown) that writes display data such as characters and images on electronic paper, and a display panel (not shown).

Returning to the explanation of FIG. 1, the storage unit 13 stores various information used by the electronic device 1. The storage unit 13 includes, for example, an image storage unit 131 and a display history storage unit 132.
The image storage unit 131 is configured with a nonvolatile memory such as an EEPROM (Electrically Erasable Programmable Read-Only Memory), and stores image data that can be displayed on the display unit 12 in advance. Here, the image data has an image size that is an integral multiple of a predetermined unit size (for example, 24 dots). Here, with reference to FIG. 3, an example of data in the image storage unit 131 in this embodiment will be described.

FIG. 3 is a diagram showing an example of data in the image storage unit 131 in this embodiment.
As shown in FIG. 3, the image storage unit 131 stores, for example, image data of images A to D in advance. Images A to D are the images shown in FIG. 2 described above.

In the example shown in FIG. 3, in the image storage unit 131, the image data of image A is stored from 0x0000 to 0x06BF with 0x0000 as the first address, and the image data of image B is stored from 0x1000 to 0x06BF with 0x1000 as the first address. It is stored at 0x147F. Further, the image data of image D is stored in 0x1800 to 0x1C7F with 0x1800 as the first address, and the image data of image D is stored in 0x2000 to 0x2DC7 as the first address is 0x2000.
In the description of this embodiment, a character string prefixed with "0x" indicates a hexadecimal notation. Further, the horizontal size and vertical size of each of images A to D are set to values that are integral multiples of 24 dots (unit size).

Returning to the explanation of FIG. 1 again, the display history storage unit 132 is configured with a nonvolatile memory such as an EEPROM, and stores the display history of images on the display unit 12. For example, as shown in FIG. 4, the display history storage unit 132 stores display history information in which a display start position is associated with an image size.

FIG. 4 is a diagram showing an example of data in the display history storage section 132 in this embodiment.
In FIG. 4, the display history storage unit 132 stores a display history in which "display start position" and "image size" are associated with each other. Here, "display start position" indicates the coordinates of the display start position of image data on the screen of the display unit 12, and "image size" indicates the "horizontal size" and "vertical size" of the displayed image. .

For example, in the example shown in FIG. 4, the "display start position" is "(0,0)" (reference position of the screen), the "horizontal size" is "288" (dots), and the "vertical size" is " This indicates that an image of 48" (dots) is displayed.
Note that the display history stored in the display history storage section 132 is used when determining the display start position by the command processing section 141, which will be described later.

Returning to the explanation of FIG. 1 again, the control unit 14 is a processor including, for example, a CPU (Central Processing Unit), and controls the electronic device 1 in an integrated manner. The control unit 14 includes a command processing unit 141 and a display control unit 142.

The command processing unit 141 (an example of a processing unit) acquires the command (processing request) that the wireless communication unit 11 receives from the reader/writer 2 via wireless communication, and executes various command processes according to the command. Further, the command processing unit 141 causes the wireless communication unit 11 to transmit (reply) a response (processing response) that is the execution result of the command processing to the reader/writer 2 .
For example, when the wireless communication unit 11 receives a display command (display request) from the reader/writer 2 via wireless communication, the command processing unit 141 executes command processing to cause the display unit 12 to display a designated image. Here, the display command includes image designation information and aspect ratio information.

The image designation information is information that designates the image data stored in the image storage section 131, and is, for example, the start address of the image data stored in the image storage section 131.
Further, aspect ratio information (an example of aspect ratio information) indicates the length and width size ratio of image data expressed based on an integral multiple of the above-mentioned unit size (for example, 24 dots). For example, aspect ratio information is obtained by multiplying a value N based on an integral multiple of the unit size of one of the vertical and horizontal sizes of the image data by a predetermined divisor value J, and then This is a value AR obtained by adding a value M based on an integral multiple of one unit size.

For example, when the unit size is 24 dots, a value N corresponding to the vertical size of the image and a value M corresponding to the horizontal size of the image are expressed by the following equation (1).

N=(vertical size/24)-1, M=(horizontal size/24)-1... (1)

Further, the value AR of the aspect ratio information in this case is expressed by the following equation (2).

AR=N×J+M... (2)

Here, the value N and the value M are integers. Further, the value J is an integer greater than or equal to 1, and is a value greater than or equal to the maximum value of N and the maximum value of M (the maximum value of N and the maximum value of M≦J).

Specifically, in the case of image A whose image size is 288 dots x 48 dots, the value N is calculated as "1" and the value M is calculated as "11" using the above formula (1) as follows. .

N=(48/24)-1=2-1=1
M=(288/24)-1=12-1=11

Further, in this case, if the value J is "15", the value AR of the aspect ratio information is calculated as "26" using the above-mentioned formula (1) as follows.

AR=1×15+11=15+11=26

When the command processing unit 141 receives the display command, it acquires the image data specified based on the image specification information from the image storage unit 131 as image data of the image size based on the aspect ratio information. That is, the command processing unit 141 reads and acquires image data corresponding to the image size calculated from the aspect ratio information (AR) from the image storage unit 131 from the start address that is the image designation information. Note that the details of the process by which the command processing unit 141 calculates the image size from the aspect ratio information (AR) will be described later.

Further, the command processing unit 141 causes the display unit 12 to display the acquired image data at a position that is sequentially shifted by the size of the previously displayed image from the reference position of the display unit 12 as a display start position. For example, the command processing unit 141 determines the display start position of the image by shifting it to the right by the amount of the displayed image based on the upper left of the screen of the display unit 12 (for example, coordinates (0, 0)). Note that if the specified image size cannot be displayed at the display start position shifted to the right by the amount of the displayed image, the command processing unit 141 changes the display start position to a new line and displays the image below the previously displayed image. Determine the left end position as the display start position.

For example, in the example shown in FIG. 2, when displaying image A, the command processing unit 141 first sets the reference position P0 (for example, coordinates (0,0)) in the upper left of the screen G1 to the display start position. decide. In this case, the command processing unit 141 associates the positional coordinates of the display start position P0 with the image size of the image A and stores them in the display history storage unit 132 as a display history.

Next, when displaying image B, the command processing unit 141 performs a line break and shifts the display start position to position P2, since image B cannot be displayed at display start position P1, which is the position where image A is displayed and shifted to the right. decided on. Here, the command processing unit 141 determines the display start position to be the position P2 based on the display history stored in the display history storage unit 132.
Similarly, when displaying images C and D, the command processing unit 141 determines the display start positions to be positions P3 and P4 based on the display history stored in the display history storage unit 132.

In this way, the command processing unit 141 determines the above-mentioned display start position based on the display history stored in the display history storage unit 132.
The command processing unit 141 also requests the display control unit 142 to display the image data acquired from the image storage unit 131 from the display start position determined as described above.

The display control section 142 controls the display on the display section 12. For example, based on a request from the command processing section 141, the display control section 142 causes the image data supplied from the command processing section 141 to be displayed from a specified display start position.

Next, with reference to FIG. 5, a process of calculating an image size from aspect ratio information (AR) by the above-mentioned command processing unit 141 will be described.
The table shown in FIG. 5 shows a list of aspect ratio information (AR) calculated from the value N and the value M based on the above-mentioned formula (2). The command processing unit 141 calculates the value N and the value M from the value AR of the aspect ratio information included in the display command using the following equation (3).

N=AR/J, M=AR%J... (3)

Here, "%" indicates a remainder operation. Further, the divisor value J is calculated based on the horizontal size (360 dots) of the display section 12 using the following formula (4).

J=horizontal size/unit size=360/24=15... (4)

In this way, the divisor value J is determined based on the size of the display section 12.
Further, the command processing unit 141 calculates the vertical size and the horizontal size from the calculated value N and value M using the following equation (5).

Vertical size = (N+1) x 24, horizontal size = (M+1) x 24... (5)

In this way, the command processing unit 141 divides the image data based on N, which is the quotient value obtained by dividing the value AR by the divisor value J, and M, which is the remainder value obtained by calculating the remainder of the value AR by the divisor value J. Calculate the vertical size and horizontal size.

Next, the operation of the electronic device 1 according to this embodiment will be described with reference to the drawings.
FIG. 6 is a flowchart illustrating an example of display command processing of the electronic device 1 according to the present embodiment.

As shown in FIG. 6, the electronic device 1 first determines whether a command has been received (step S101). That is, the control unit 14 of the electronic device 1 determines whether the wireless communication unit 11 has received a command from the reader/writer 2. When the wireless communication unit 11 receives the command (step S101: YES), the control unit 14 advances the process to step S102. Further, if the wireless communication unit 11 has not received the command (step S101: NO), the control unit 14 returns the process to step S101.

Note that when a command is received here, it is assumed that all the message data of each command is received by receiving the message once or by receiving the message multiple times by chaining.
In addition, the display command can specify and display multiple images in one command process, and the message of the display command includes the display command code, the number of images, and information about each image (starting address and aspect). ratio information) and display command end information.

In step S102, the command processing unit 141 of the control unit 14 determines whether the command received from the reader/writer 2 is a display command. If the command received from the reader/writer 2 is a display command (step S102: YES), the command processing unit 141 advances the process to step S103. Further, if the command received from the reader/writer 2 is not a display command (a command other than a display command) (step S102: NO), the command processing unit 141 advances the process to step S113.

In step S103, the command processing unit 141 sets the image count value n to "1".
Next, the command processing unit 141 calculates the image size based on the aspect ratio information (AR) (step S104). That is, the command processing unit 141 calculates the horizontal size and vertical size of the image from the aspect ratio information (AR) of the n-th image included in the display command using equations (3) and (5) described above. do.

Next, the command processing unit 141 reads image data from the image start address in the image storage unit 131 (step S105). The command processing unit 141 reads the image data of the image size calculated in step S104 described above from the image storage unit 131 using the n-th image designation information included in the display command as the image start address.

Next, the command processing unit 141 determines a display start position from the display history and image data (step S106). The command processing unit 141 starts displaying as explained using FIG. Determine the position.

Next, the command processing unit 141 generates screen data for displaying image data from the display start position of the display unit 12 (step S107). The command processing unit 141 generates screen data for the display unit 12 so as to display the n-th image data from the display start position described above.

Next, the command processing unit 141 adds display history (step S108). That is, the command processing unit 141 causes the display history in the display history storage unit 132 to store the display start position and image size of the n-th image data in association with each other, as shown in FIG. Add.

Next, the command processing unit 141 adds "1" to the count value n (step S109). That is, the command processing unit 141 sets the image count value n to the value (n+1).

Next, the command processing unit 141 determines whether the count value n is greater than the number of images included in the display command (step S110). If the count value n is greater than the number of images (step S110: YES), the command processing unit 141 advances the process to step S111. Further, when the count value n is less than or equal to the number of images (step S110: NO), the command processing unit 141 returns the process to step S104 and repeats the processes from step S104 to step S110.

In step S111, the command processing unit 141 displays the generated screen data on the display unit 12. That is, the display control unit 142 is requested to display the generated screen data on the display unit 12, and the display control unit 142 causes the display unit 12 to display a display screen that includes the image data specified by the display command. . As a result, the image data specified by the display command is displayed on the display unit 12.

Next, the command processing unit 141 transmits a response (step S112). The command processing unit 141 transmits a response corresponding to various command processing to the reader/writer 2 via the wireless communication unit 11 as a result of the command processing. After the process in step S112, the control unit 14 returns the process to step S101.

Further, in step S113, the command processing unit 141 executes other command processing (command processing other than the display command). After the processing in step S113, the command processing unit 141 advances the processing to step S112, and transmits a response as a result of other command processing.

Next, with reference to FIG. 7, display processing on the display unit 12 in this embodiment will be described.
FIG. 7 is a diagram showing an example of display processing on the display unit 12 in this embodiment. In FIG. 7, an example in which images A to D shown in FIG. 2 described above are displayed on the display unit 12 will be described. Note that here, an example will be described in which a display command is transmitted by dividing it into four messages using an R (ACK) block message (acknowledge message).

As shown in FIG. 7, the reader/writer 2 first sends a split message of a display command including a display command code, the number of images, and information about image A (starting address and aspect ratio information of image A) to the electronic device 1. (Step S201). For example, the start address here is 0x0000, and the value AR of the aspect ratio information is 0x1A. Further, in this example, the number of images is "4".
Next, the electronic device 1 transmits R (ACK) for the message in step S201 to the reader/writer 2 (step S202).

Next, the reader/writer 2 transmits a divided message of a display command including information about image B (the start address and aspect ratio information of image B) to the electronic device 1 (step S203). For example, the start address here is 0x1000, and the value AR of the aspect ratio information is 0x30.
Next, the electronic device 1 transmits R (ACK) for the message in step S203 to the reader/writer 2 (step S204).

Next, the reader/writer 2 transmits a divided message of a display command including information about the image C (the start address and aspect ratio information of the image C) to the electronic device 1 (step S205). For example, the start address here is 0x1800, and the value AR of the aspect ratio information is 0x30.
Next, the electronic device 1 transmits R (ACK) for the message in step S205 to the reader/writer 2 (step S206).

Next, the reader/writer 2 transmits to the electronic device 1 a split message of a display command that includes information about the image D (starting address and aspect ratio information of the image D) and display command end information (step S207). For example, the start address here is 0x2000, and the value AR of the aspect ratio information is 0x60.

Next, the electronic device 1 displays images A to D on the display unit 12 in response to the display command (step S208). As shown in FIG. 2, the electronic device 1 displays an image A from a display start position P0 on the display section 12, and displays an image B from a display start position P2 on the display section 12. Further, as shown in FIG. 2, the electronic device 1 displays the image C from the display start position P3 of the display section 12, and displays the image D from the display start position P4 of the display section 12.
Next, the electronic device 1 transmits a response to the display command to the reader/writer 2 (step S209).

In this way, the electronic device 1 moves the display start position from position P0 to position P2 to position P3 to position P4 in response to the display command including the start address and aspect ratio information of images A to D, and displays the images. Images A to D stored in the storage unit 131 are displayed.

In addition to the above-mentioned display commands, the electronic device 1 also uses a line feed command to forcibly change the display start position to a new line, and a display clear command that erases the display on the display unit 12 and returns the display start position to the reference position coordinates. A command process (processing of a start position change request) for changing the display start position may be provided. That is, the command processing unit 141 may change the display start position in response to these commands (start position change requests) that the wireless communication unit 11 receives from the reader/writer 2 via wireless communication. Further, the command processing unit 141 erases the display history stored in the display history storage unit 132 in response to the display clear command.

Furthermore, in the above example, the display command is divided into four parts and sent to the electronic device 1. However, if the message length of the display command is within the maximum transmission data length, one message is sent without being divided. Alternatively, the information may be transmitted to the electronic device 1. In addition, in the above example, the number of images is set to "4" and information on four images is transmitted using the display command. However, the number of images is set to "1" and the processing is divided into four display commands. It may also be processed by

As described above, the electronic device 1 according to the present embodiment includes the display section 12, the image storage section 131, the wireless communication section 11, and the command processing section 141 (processing section). The display unit 12 performs display having non-volatile memory properties. The image storage unit 131 has an image size that is an integral multiple of a predetermined unit size (for example, 24 dots), and stores in advance image data that can be displayed on the display unit 12. The wireless communication unit 11 communicates with the reader/writer 2 (upper-level device) by wireless communication. The command processing unit 141 receives a display request (for example, a display command) that the wireless communication unit 11 receives from the reader/writer 2 via wireless communication, and processes image designation information (for example, a start address) and the vertical and horizontal size ratio of the image data. In response to a display request (for example, a display command) that includes aspect ratio information (aspect ratio information), the image data specified based on the image specification information is converted into image data with an image size based on the aspect ratio information. It is acquired from the image storage unit 131. Here, the image designation information is information that designates image data stored in the image storage unit 131, and the aspect ratio information (aspect ratio information) is based on a number that is an integral multiple of a predetermined unit size (for example, 24 dots). This is the information expressed as follows. Then, the command processing unit 141 moves the acquired image data to a position that is sequentially shifted by the size of the previously displayed image from the reference position of the display unit 12 (for example, position P0 → position P2 → position P3 → position P4) is displayed on the display unit 12 as the display start position.

As a result, the electronic device 1 according to the present embodiment requires image designation information (for example, start address) and aspect ratio information (aspect ratio information) when displaying on the display unit 12, and does not require other information. , it is possible to reduce the amount of information transmitted from the reader/writer 2 when displaying it on the display unit 12.

For example, in a conventional electronic device, in order to display an image on the display unit 12, the reader/writer 2 needs to transmit the following information (a) to (f).
(a) Address of the storage unit where the image is saved: 2 bytes (b) Image data size: 2 bytes (c) Horizontal size of the image: 2 bytes (d) Vertical size of the image: 2 bytes (e ) X coordinate of the display start position where the image data is displayed: 2 bytes (f) Y coordinate of the display start position where the image data is displayed: 2 bytes In this case, the amount of information required to display the image on the display unit 12 is , 12 bytes.

On the other hand, in the electronic device 1 according to the present embodiment, the image designation information is the start address (2 bytes) where the image is stored and the aspect ratio information (1 byte). For this reason, in the electronic device 1 according to the present embodiment, the information (b) to (f) described above is no longer necessary, and aspect ratio information (1 byte) is added instead, so that the image cannot be displayed on the display unit 12. The amount of information required for display is 3 bytes. That is, in the electronic device 1 according to the present embodiment, the amount of information required for the conventional technology can be reduced from 12 bytes to 3 bytes (reduction of 9 bytes), and the amount of information transmitted from the reader/writer 2 when displayed on the display unit 12 can be reduced. The amount of information can be reduced.

Further, in the present embodiment, the aspect ratio information is obtained by multiplying a value N based on an integral multiple of one of the vertical size and horizontal size of the image data (for example, 24 dots) by a predetermined divisor value J. , is the value AR obtained by adding a value M based on an integral multiple of the other unit size (for example, 24 dots) of the vertical size and the horizontal size (however, the divisor value J is an integer of 1 or more, maximum value of N and maximum value of M≦J). That is, the aspect ratio information is calculated by the above-mentioned equation (2). In addition, the command processing unit 141 determines the vertical size of the image data based on N, which is the quotient value obtained by dividing the value AR by the divisor value J, and M, which is the remainder value obtained by calculating the remainder of the value AR by the divisor value J. and calculate the horizontal size.

As a result, in the electronic device 1 according to the present embodiment, the vertical size and the horizontal size are compressed by a unit size (for example, 24 dots), and the vertical size and the horizontal size are combined into one piece of information as vertical and horizontal h. and the amount of information indicating the horizontal size can be reduced by a simple method.

Further, in this embodiment, the above-mentioned divisor value J is determined based on the size of the display section 12. For example, the divisor value J is determined based on the horizontal size (for example, the larger of the vertical size and the horizontal size) using equation (4) described above.
Thereby, in the electronic device 1 according to the present embodiment, the vertical size and the horizontal size can be expressed more efficiently using aspect ratio information (AR).

Further, in the present embodiment, the command processing unit 141 starts the display in response to a start position change request (for example, the above-mentioned line feed command or display clear command) that the wireless communication unit 11 receives from the reader/writer 2 via wireless communication. Change position.
Thereby, in the electronic device 1 according to the present embodiment, the display start position can be changed appropriately, so that the degree of freedom in displaying on the display unit 12 can be increased.

Further, the display method according to the present embodiment is a display method for the electronic device 1 described above, and includes a receiving step and a processing step. In the receiving step, the wireless communication unit 11 indicates image designation information specifying the image data stored in the image storage unit 131 and the vertical and horizontal size ratio of the image data expressed based on an integral multiple of a predetermined unit size. A display command including aspect ratio information is received from the reader/writer 2 via wireless communication. In the processing step, the command processing unit 141 stores the image data specified based on the image specification information in the image storage unit 131 as image data with an image size based on the aspect ratio information, in accordance with the display command received in the reception step. The acquired image data is displayed on the display section 12 with a position sequentially shifted by the size of the previously displayed image from the reference position of the display section 12 as a display start position.
Thereby, the display method according to the present embodiment has the same effect as the electronic device 1 described above, and can reduce the amount of information transmitted from the reader/writer 2 when displaying on the display unit 12.

[Second embodiment]
Next, a production management system 100 using the above-described electronic device 1 will be described as a second embodiment with reference to the drawings.

FIG. 8 is a block diagram showing an example of the production management system 100 according to this embodiment.
As shown in FIG. 8, the production management system 100 includes an electronic device 1, a plurality of readers/writers 2 (2-1, 2-2, 2-3, . . . ), and a management device 3.

Since the electronic device 1 has the same configuration as described in the first embodiment described above, the description thereof will be omitted here. The electronic device 1 includes, for example, an IFID that displays on the display unit 12 control slips and process slips that include lot information, product codes, number of products in progress, number of non-defective products/defective products, etc. of various products managed by the production management system 100. It is a tag attached to a shipping box 4 for transporting various products and parts. The electronic device 1 may display, for example, a two-dimensional code such as a barcode or a QR code (registered trademark) for production management on the display unit 12.
The shipping box 4 is, for example, a returnable box in which a product is placed and transported through each production process (for example, production process PS1 to production process PS3) at the production site.

Note that in the example shown in FIG. 8, one set of the electronic device 1 and the shipping box 4 is shown for convenience of explanation, but the production management system 100 includes multiple sets of the electronic device 1 and the shipping box 4. It may also be managed.
The reader/writer 2 (an example of a host device) has the same configuration as that described in the first embodiment, so the description thereof will be omitted here. Note that each of the reader/writer 2-1, reader/writer 2-2, reader/writer 2-3, etc. has the same configuration, and when referring to any reader/writer included in the production management system 100, or when specifically distinguishing If not, it will be explained as reader/writer 2.

The reader/writer 2 is arranged for each production process (an example of a process), and when the electronic device 1 passes through the production process, it transmits a display command to change the display on the display unit 12 according to the production process. Here, in the example shown in FIG. 8, the reader/writer 2-1 is placed in the production process PS1, and the reader/writer 2-2 is placed in the production process PS2. Further, the reader/writer 2-3 is placed in the production process PS3.
Production process PS1 to production process PS3 are, for example, processes such as product manufacturing, inspection, storage, and shipping.

The management device 3 controls the plurality of readers/writers 2 to manage the entire production management system 100 . The management device 3 changes the display section 12 of the electronic device 1 via the reader/writer 2 according to the contents, results, etc. of each production process, and also changes the display section 12 of the electronic device 1 via the reader/writer 2. , for example, managing products, parts, etc.

As described above, the production management system 100 (an example of a management system) according to the present embodiment includes the above-described electronic device 1 and a plurality of reader/writers 2 (reader/writer devices). The reader/writer 2 is a host device that is arranged for each process and transmits a display command (display request) when the electronic device 1 passes through the process to change the display on the display unit 12 according to the process.
As a result, in the production management system 100 according to the present embodiment, the electronic device 1 can reduce the amount of information transmitted from the reader/writer 2 when displaying it on the display unit 12, so that the process can be managed efficiently. can.

For example, when changing the display of a large number of electronic devices 1 in a production process, the amount of information sent from the reader/writer 2 to each electronic device 1 is minimized from the viewpoint of communication traffic occupancy, communication cost, and management. It is necessary to keep it to a minimum. In the production management system 100 according to the present embodiment, even in such a case, the amount of information transmitted from the reader/writer 2 can be reduced, so that the process can be managed efficiently.

Further, for example, if the production site is a clean room or the like, it may not be possible to use normal paper control forms or process forms due to the generation of dust. On the other hand, in the production management system 100 according to the present embodiment, by using the electronic device 1 instead of paper control sheets and process sheets, the generation of dust is suppressed and the effort of paper printing and management is saved. This allows for efficient process management.

Note that the present invention is not limited to the above-described embodiments, and can be modified without departing from the spirit of the present invention.
For example, in each of the above embodiments, the electronic device 1 is an RFID tag, a contactless IC card, an edge device, etc.; It may also be another electronic device such as an IoT device connected to an IoT (Internet of Things) network.

Further, in each of the above embodiments, an example has been described in which the electronic device 1 uses NFC as an example of wireless communication, but the present invention is not limited to this. The electronic device 1 may use other wireless communication such as Bluetooth (registered trademark), specific low power wireless communication such as LPWA (Low Power Wide Area), or wireless LAN (Local Area Network) instead of NFC. You can also do this.

Further, in each of the above embodiments, an example in which the unit size is 24 dots has been described, but the unit size is not limited to this, and other sizes (other numbers of dots) may be used. The unit size may be set so that the values of N, M, and AR fall within an appropriate size.
Further, the unit size may be set to different values for the vertical size and the horizontal size of the display section 12. For example, the vertical size unit size may be 16 dots, and the horizontal size unit size may be 24 dots. Further, the unit size does not have to be a multiple of 8.

Further, in each of the above embodiments, the case where the divisor value J is "15" has been described, but it is not limited to this. For example, it may be a number of 2 to the n power such as "16". good. For example, when the divisor value J is set to "16", the quotient and remainder value of the aspect ratio information value AR by equation (3) can be calculated by separating the upper 4 bits and lower 4 bits of the value AR. This allows the command processing unit 141 to simplify the processing.
Furthermore, an example has been explained in which the divisor value J is determined to be "15" based on the size of the display unit 12 using equation (4). may also be a large value.

In addition, in each of the above embodiments, the value N and the value M are values including "0" (zero). Good too. In this case, there is no need to subtract "1" from equation (1), and there is no need to add "1" from equation (5).

Further, in each of the above embodiments, an example in which an image start address is used as an example of image designation information has been described, but the invention is not limited to this. For example, the image ID (image identifier) assigned to image data ), image name, image file name, etc. may also be used.

Furthermore, in the second embodiment described above, an example of the production management system 100 has been described as an example of the management system, but the present invention is not limited to this. The management system of the present invention may be suitable for other management systems such as, for example, an inventory management system or a logistics management system.

Note that each component included in the production management system 100 described above has a computer system therein. Then, a program for realizing the functions of each component included in the production management system 100 described above is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed. Processing in each configuration included in the production management system 100 described above may be performed. Here, "reading a program recorded on a recording medium into a computer system and executing it" includes installing the program on the computer system. The "computer system" here includes hardware such as an OS and peripheral devices.
Further, a "computer system" may include a plurality of computer devices connected via a network including the Internet, a WAN, a LAN, a communication line such as a dedicated line, etc. Furthermore, the term "computer-readable recording medium" refers to portable media such as flexible disks, magneto-optical disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into computer systems. In this way, the recording medium storing the program may be a non-transitory recording medium such as a CD-ROM.

The recording medium also includes a recording medium provided internally or externally that can be accessed from the distribution server for distributing the program. Note that the program may be divided into a plurality of parts, each of which is downloaded at different timings, and then combined with each component of the production management system 100, or the distribution servers that distribute each of the divided programs may be different. Furthermore, a ``computer-readable recording medium'' refers to a storage medium that retains a program for a certain period of time, such as volatile memory (RAM) inside a computer system that serves as a server or client when a program is transmitted via a network. This shall also include things. Moreover, the above-mentioned program may be for realizing a part of the above-mentioned functions. Furthermore, it may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

Further, some or all of the functions described above may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each of the above-mentioned functions may be implemented as an individual processor, or some or all of them may be integrated into a processor. Moreover, the method of circuit integration is not limited to LSI, but may be implemented using a dedicated circuit or a general-purpose processor. Further, if an integrated circuit technology that replaces LSI emerges due to advances in semiconductor technology, an integrated circuit based on this technology may be used.

1 Electronic device 2, 2-1, 2-2, 2-3 Reader/writer 3 Management device 4 Box 11 Wireless communication section 12 Display section 13 Storage section 14 Control section 100 Production management system 131 Image storage section 132 Display history storage section 141 Command processing unit 142 Display control unit PS1, PS2, PS3 Production process

Claims (6)

a display unit that displays a display having non-volatile memory properties;
an image storage unit that has an image size that is an integral multiple of a predetermined unit size and stores in advance image data that can be displayed on the display unit;
a wireless communication unit that communicates with the host device via wireless communication;
The display request received by the wireless communication unit from the host device through the wireless communication includes image designation information specifying the image data stored in the image storage unit, and a plurality of dots , which is a multiple of 8. The vertical size and horizontal size of the image data are compressed by the predetermined unit size expressed based on an integral multiple of the predetermined unit size, which is the number of dots, and the compressed vertical size and horizontal size are 1 In response to a display request including aspect ratio information summarized in one piece of information, the image storage unit stores the image data specified based on the image designation information as the image data with an image size based on the aspect ratio information. and a processing unit that causes the display unit to display the acquired image data on the display unit, with the display start position being a position that is sequentially shifted by the size of a previously displayed image from the reference position of the display unit. Featured electronic devices. The aspect ratio information is obtained by multiplying a value N based on the integer multiple of one of the vertical size and the horizontal size of the image data by a predetermined divisor value J, The value AR is the sum of the value M based on one of the integral multiples (however, the divisor value J is an integer obtained by compressing the horizontal size of the display section based on the predetermined unit size, and the maximum value of N is value and the maximum value of M≦J),
The processing unit processes the image based on the N, which is a quotient value obtained by dividing the value AR by the divisor J, and the M, which is a remainder value obtained by performing a remainder calculation on the value AR by the divisor J. The electronic device according to claim 1, wherein the electronic device calculates a vertical size and a horizontal size of data. The electronic device according to claim 2, wherein the divisor value J is determined based on the size of the display section. The processing unit includes:
4. The display start position according to claim 1, wherein the wireless communication unit changes the display start position in response to a start position change request received from the host device through the wireless communication. electronic device. The electronic device according to any one of claims 1 to 4,
a plurality of reader/writer devices that are arranged for each process and are the host devices that transmit the display request and change the display on the display unit according to the process when the electronic device passes through the process; A management system characterized by comprising: A display section that performs display with non-volatile memory properties, an image storage section that has an image size that is an integral multiple of a predetermined unit size and that stores in advance image data that can be displayed on the display section, and a host device via wireless communication. A display method for an electronic device comprising: a wireless communication unit that communicates with the electronic device;
The wireless communication unit includes image designation information specifying the image data stored in the image storage unit, and a number of dots that is an integral multiple of the predetermined unit size that is a multiple of 8. A display request that includes compressing the vertical size and horizontal size of the image data using the predetermined unit size expressed based on the above, and aspect ratio information that combines the compressed vertical size and horizontal size into one piece of information, a receiving step of receiving from the higher-level device through the wireless communication;
In response to the display request received in the receiving step, the processing unit stores the image data designated based on the image designation information as the image data having an image size based on the aspect ratio information, and stores the image data in the image storage unit. and set the display start position at a position where the acquired image data is sequentially shifted by the size of the image displayed in the past from the reference position of the display unit,
A display method characterized by comprising: a processing step of displaying on the display unit.

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