JP2015184740A - portable information code display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constitution which can further quickly and exactly read an information code when performing a hold-up operation for making a reading device read the information code, in a portable information code display device which can display the information code as a part of a moving image or a part of a stationary image.SOLUTION: A portable information code display device 10 comprises a display 12 which can display an image, and a three-axis sensor 15 which can detect a direction to which the display 12 directs when the display 12 displays an information code C as a part of a stationary image to be switched. When the direction of the display 12 which is detected by the three-axis sensor 15 becomes a prescribed reference direction, a control circuit 11 brings a display state in the display 12 into a state that the information code C is continuously displayed by a constitution in which the information coded can be read by an information code reading device 20.

Description

  The present invention relates to a portable information code display device.

  In recent years, information code usage methods and display methods have been diversified. As an example, a technique such as Patent Document 1 has been proposed. In the technique of Patent Document 1, a two-dimensional code is displayed after a predetermined short time has elapsed since the logo mark image was displayed, and the logo is again displayed after a predetermined short time has elapsed since the two-dimensional code was displayed. Switching control such as displaying an image of a mark is performed. By performing such switching display, it is possible to display a two-dimensional code as an image with high designability.

JP 2009-271553 A

  By the way, when the display device is configured so as to switch between the information code and another image or display the information code as a part of the moving image as in the display device of Patent Document 1, the display device is read. When the information code is read by the device, the display screen of the display device may be in a display state that is not suitable for reading. For example, there is a case where the information code is not displayed at the timing when the display device is moved to the reading device, or the information code is displayed in a configuration that cannot be read. The information code is read after being displayed in a readable configuration after a while without being read. However, if there is a discrepancy between the timing at which the display device is directed to the reading device and the timing at which the display device is actually read, it takes time to obtain the reading result, and the timing at which the display device is directed to the reading device. Since the time lag from the time becomes large, the reading feeling is lowered.

  The present invention has been made to solve the above-described problems, and is a portable information code display device that can display an information code as a part of a moving image or as a part of a still image to be switched. It is an object of the present invention to provide a configuration capable of reading an information code more quickly and reliably when a fraud operation is performed to allow the information code to be read.

The present invention
A display unit capable of displaying an image;
In the display unit, a display control unit for displaying the information code as a part of a moving image or a part of a still image to be switched,
A direction detection unit capable of detecting a direction in which the display unit faces;
With
The display control unit can read the information code on the display unit by the information code reader when the direction of the display unit detected by the direction detection unit becomes a predetermined reference direction. It is set as the state displayed continuously or intermittently by the structure which becomes.

According to the first aspect of the present invention, the information code is stabilized in a readable display state while reading, while realizing a configuration in which the information code can be displayed as a part of a moving image or a part of a still image to be switched. Can be read more reliably.
Specifically, when the direction of the display unit detected by the direction detection unit becomes a predetermined reference direction, the display state on the display unit is continuously configured so that the information code can be read by the information code reader. Or a state of being displayed intermittently or intermittently. In this configuration, it suffices if the reading device is arranged so that the display unit can be read when the user points the display unit in the reference direction. When the information code is read (that is, when the reading device reads the information code), the information code can be maintained in a readable display state and can be read stably.
If such measures are not taken, for example, there is a possibility that the information code is not displayed or the information code cannot be read at the timing when the display unit is put on the information code reader. In this case, there is a concern that the reading is delayed until the information code can be read. On the other hand, according to the above-described configuration, the information code is read when the decoy operation for causing the information code reader to read the information code is performed (that is, when the display unit is directed toward the reference direction). Since the display state is maintained as possible, the information code can be read more quickly and reliably. Accordingly, the timing at which the display unit is directed to the information code reading device and the timing at which it is actually read are not greatly displaced, and a large time lag is unlikely to occur from when the display unit is directed to the information code reading device until a reading result is obtained. A decrease in feeling can be more effectively suppressed.

In the invention of claim 2, the direction detection unit can detect a state in which the display unit faces vertically downward or obliquely downward. The display control unit can read the display state on the display unit by the information code reader when the direction detection unit detects that the display unit faces vertically downward or obliquely downward. It is assumed that the state is displayed with the following structure.
This configuration is advantageous when it is desired to display the information code as a part of a moving image or as a part of a still image to be switched and to use the display unit so as to be turned downward or diagonally downward. . In particular, when the display unit is used in such a manner that the display unit is tilted downward or obliquely downward, it is difficult for the user to visually observe the display unit when reading the display unit. There is a problem that it is difficult to specify whether a delay or failure has occurred, or due to other factors, but according to this configuration, delay and failure due to incompatibility of display timing can be significantly reduced. The said problem can be suppressed reliably.

In the invention of claim 3, the display control unit displays the display state on the display unit when the direction of the display unit detected by the direction detection unit becomes the reference direction, and the information code is continuously displayed. It becomes the composition which is fixed with.
In this configuration, since the display of the information code can be fixed when the display unit is oriented in the reference direction, the information code is displayed as a part of the moving image or a part of the still image to be switched, while at the time of reading, Stable code display is possible, and reading delays and failures due to changes in the display state can be further suppressed.

According to a fourth aspect of the present invention, when the direction of the display unit detected by the direction detection unit becomes the reference direction, the display control unit reads the display state on the display unit with the information code reader. It is configured so as to be displayed in a possible configuration and to maintain the display state until a predetermined release condition is satisfied. And the power saving control part of the structure which performs predetermined power saving control after predetermined cancellation | release conditions are satisfied is provided.
According to this configuration, when the display unit is read in the reference direction, the display of the information code can be stabilized and easily read until the release condition is satisfied. Can save power smoothly.

In the invention of claim 5, when the display control unit recognizes that the change in the direction of the display unit detected by the direction detection unit has reached a predetermined change state approaching the reference direction, the display state on the display unit Is maintained in a state where the information code is displayed in a configuration that can be read by the information code reader.
In this configuration, before the display unit is completely turned to the reference direction, the state that changes to the reference direction can be pre-read, and the display of the information code can be shifted to a display state that can be read earlier, and can be stabilized. Therefore, it is possible to prepare to read the information code before the display portion is completely turned to the reference direction, and to complete the reading of the information code at an earlier stage.

In the invention of claim 6, the display control unit displays the information on the display unit in a state where the information code in a state where the information code can be read by the information code reading device and an information code which can be read by the information code reading device. It is configured to be able to change to a state in which another figure or other information different from the configuration is displayed. Then, at least when the direction of the display unit detected by the direction detection unit becomes the reference direction, the display state on the display unit is displayed in a state in which the information code is displayed in a configuration that can be read by the information code reader. It is the structure to maintain.
According to this configuration, it is possible to realize a configuration in which the display state of the display unit can be changed to a display state in which an information code is displayed, a display state in which another figure or other information is displayed, and the like. It becomes easy to display in relation to the figure or other information. And while enabling such a plurality of types of display, when reading (that is, when the display unit is directed in the reference direction), the information code is stably displayed, and the information code can be displayed more quickly and more efficiently. It becomes possible to make it read reliably.

In the invention of claim 7, the display control unit continuously or temporarily changes the display state on the display unit to another figure or other when the direction of the display unit detected by the direction detection unit is not the reference direction. Information is displayed. When the direction of the display unit detected by the direction detection unit becomes the reference direction, the display state on the display unit is maintained in a state in which the information code is displayed in a configuration that can be read by the information code reader. To do.
In this configuration, when the display unit is not oriented in the reference direction, another figure or other information can be displayed. Therefore, when the user easily sees the display unit, This information is easily displayed, and it is easy for the user to recognize other figures or other information. On the other hand, when it is difficult for the user to visually recognize the display unit (when the display unit is pointed in the reference direction), the information code is easily displayed stably. Can be displayed more efficiently at a timing more suitable for each display.

In the invention according to claim 8, the display control unit displays the display state on the display unit in a state where the information code is displayed in a configuration that can be read by the information code reading device, and the information code cannot be read by the information code reading device. It can be changed to the state displayed in the configuration. When at least the direction of the display unit detected by the direction detection unit becomes the reference direction, the display state on the display unit is a state in which the information code is displayed in a configuration that can be read by the information code reader. .
In this configuration, the information code can be displayed by a novel display method having a characteristic of changing between a readable display state and an unreadable display state. On the other hand, in such dynamic display, there is a problem that the information code cannot be read at all if the display part is deceived in the unreadable display state. In this configuration, however, the display part is in the reference direction. When reading in the direction, the display of the information code can be maintained in a readable display state. For this reason, it is possible to read the information code more reliably while enabling a novel display that greatly changes between a display state in which the information code can be read and a display state in which the information code cannot be read.

FIG. 1 is an explanatory diagram for explaining a display state of still images that are switched in the portable information code display device according to the first embodiment. FIG. 2 is a block diagram illustrating the electrical configuration of the portable information code display device shown in FIG. FIG. 3 is a block diagram illustrating an electrical configuration of a reading device that reads an information code displayed on the portable information code display device of FIG. 1. FIG. 4 is an explanatory diagram for explaining how the information code displayed on the portable information code display device of FIG. 1 is read by the reading device of FIG. FIG. 5 is a flowchart illustrating the flow of display processing performed by the portable information code display device of FIG. FIG. 6 is an explanatory diagram for explaining the angle formed by the direction of the combined acceleration obtained from the accelerations in the respective axial directions detected by the three-axis sensor and the direction in which the display unit faces (Z-axis positive direction). FIG. 7 is an explanatory diagram conceptually illustrating a display example on the portable information code display device according to the third embodiment. FIG. 8 is an explanatory view for conceptually explaining a display example of a moving image on the portable information code display device according to the fourth embodiment. FIG. 9 is an explanatory diagram conceptually illustrating an example of display of an information code in a portable information code display device according to another embodiment. FIG. 9A illustrates an example in which the display of the information code blinks. FIG. 9B is an explanatory diagram illustrating an example in which the size of the information code changes.

[First embodiment]
Hereinafter, a first embodiment embodying the present invention will be described with reference to the drawings.
(Portable information code display device)
The portable information code display device 10 will be described. A portable information code display device (hereinafter also simply referred to as a display device) 10 shown in FIGS. 1 and 4 is configured to be used while being held by a user. The display device 10 is configured as, for example, a portable information terminal that is carried by a user and used in various places, and has a function of generating and displaying an information code C such as a barcode or a two-dimensional code. doing. In addition, the display apparatus 10 should just be portable information apparatuses which have displays, such as a mobile telephone, a smart phone, and a wearable terminal, and functions other than a display function are not specifically limited.

  The display device 10 has an outer case formed of a housing made of, for example, a resin material or a metal material. In addition, a display 12 capable of displaying various information, an operation unit 13 for performing an information input operation from the outside, and the like are assembled in the casing, and an integrated device structure is formed.

  As shown in FIG. 2, the display device 10 mainly includes a control circuit 11, a display 12, an operation unit 13, a memory 14, a triaxial sensor 15, a communication unit 16, a clock unit 17, and the like. These are mounted on a printed wiring board (not shown) or housed in a housing.

  The memory 14 is configured by a known storage device such as a semiconductor memory device, and corresponds to, for example, a RAM, a ROM, and other nonvolatile memories. The RAM of the memory 14 is configured such that a work area or the like used by the control circuit 11 at the time of each processing such as arithmetic operation and logical operation can be secured. In addition, the ROM stores in advance a predetermined program that can execute processing for generating an information code C, which will be described later, and a system program that can control each piece of hardware such as the display 12 and the three-axis sensor 15.

  The control circuit 11 includes a microcomputer that can control the display device 10 as a whole, and includes a CPU, a system bus, an input / output interface, and the like, and has an information processing function. Various input / output devices (peripheral devices) are connected to the control circuit 11 via a built-in input / output interface. In the case of this embodiment, the display unit 12, the operation unit 13, the memory 14, and the three axes. A sensor 15, a communication unit 16, a clock unit 17, and the like are connected.

  The operation unit 13 includes an operation switch such as a function key or a numeric keypad, or a touch panel. For example, when the user of the display device 10 operates the operation unit 13, an operation corresponding to the operation content is performed on the control circuit 11. It is configured to give a signal. The communication unit 16 is configured to communicate with an external device by, for example, a known communication method (wireless LAN communication, infrared communication, Bluetooth communication, etc.). The clock unit 17 is configured by a known clock circuit or the like, and is connected to the control circuit 11 so as to be communicable. The clock unit 17 functions to measure time and elapsed time from a predetermined time point (for example, a time point when the operation unit 13 is operated).

  The triaxial sensor 15 and the control circuit 11 correspond to an example of a “direction detection unit”, and function to detect the direction in which the display 12 faces. The triaxial sensor 15 is configured by a known acceleration sensor or the like, and in this configuration, the display device 10 is configured to measure accelerations in predetermined three directions orthogonal to each other. In the example shown in FIG. 1 and the like, the predetermined longitudinal direction of the display device 10 is the Y-axis direction, and the thickness direction of the display device 10 (the direction perpendicular to the longitudinal direction, opposite to the surface on the display 12 side and vice versa. The direction in which the back surface of the Z-axis faces is the Z-axis direction (not shown), and the Y-axis direction and the width direction orthogonal to the Z-axis direction are the X-axis direction. Further, one side in the Z-axis direction (side displayed by the display device 12) is the Z-axis positive side, and the other side opposite to this is the Z-axis negative side. Specifically, for example, the transparent plate is arranged so as to cover each display element constituting the display device 12, and the direction orthogonal to the outer surface (surface) of the transparent plate is the Z-axis direction. The direction on the positive side of the Z axis is “the direction in which the display 12 faces”. A technique for specifying the acceleration in the predetermined direction and the vertical direction by a triaxial acceleration sensor is well known and will not be described in detail. For example, it is shown in Japanese Patent Application Laid-Open Nos. 2003-302419 and 2007-325722. In addition to the methods described above, various known methods can be used. With such a configuration, it is possible to measure the degree of acceleration in each of the X-axis direction, the Y-axis direction, and the Z-axis direction, and to specify which direction is the vertical direction in the display device 10. It has become.

  The display device 12 corresponds to an example of a display unit that displays an image, and is configured by a known display device such as a liquid crystal display device or an organic EL display. The information processing result by the control circuit 11, the operation state of the display device 10, and the like. Various types of information can be displayed. The display 12 functions to display the information code C generated by the control circuit 11 as a moving image or as a part of a still image to be switched. The information code C displayed on the display unit 12 may be a QR code (registered trademark), a data matrix code, a maxi code, other two-dimensional codes, or the like, and is a one-dimensional code such as a barcode. Also good.

(Information code reader)
Next, the information code reading device 20 will be described. 3 and 4 is configured as a code reader capable of reading an information code in hardware, and an outer case is configured by a case. Various electronic components are accommodated in the case. The reading device 20 has a function of reading an information code such as a barcode or a two-dimensional code displayed on the display device 10. Although FIG. 4 illustrates the stationary information code reading device 20 that can be used by being placed on a desk or the like, a portable configuration may be used. Moreover, the apparatus used by being assembled | attached to another structure (a desk, a pillar, a wall, etc.) may be used.

  As shown in FIG. 3, the reading device 20 mainly includes an optical system such as an illumination light source 21, a light receiving sensor 23, a filter 25, and an imaging lens 27, a memory 35, a control circuit 40, an operation switch 42, and a liquid crystal display. And a power supply system such as a power switch 41 and a battery 49. These are mounted on a printed wiring board (not shown) or housed in a case (not shown).

  The optical system includes an illumination light source 21, a light receiving sensor 23, a filter 25, an imaging lens 27, and the like. The illumination light source 21 functions as an illumination light source capable of emitting illumination light Lf, and includes, for example, a red LED and a diffusion lens, a condensing lens, and the like provided on the emission side of the LED. In the present embodiment, the illumination light source 21 is provided on both sides of the light receiving sensor 23, and is directed toward the reading object R (for example, the display device 10 described above) via a reading port (not shown) formed in the case. The illumination light Lf can be irradiated.

  The light receiving sensor 23 is configured to be able to receive light from the reading object R or the information code C (for example, reflected light Lr reflected by the illumination light Lf being irradiated on them). An area sensor in which light receiving elements, such as solid-state imaging elements, are two-dimensionally arranged corresponds to this. The light receiving sensor 23 is mounted on a printed wiring board (not shown) so that incident light incident through the imaging lens 27 is received by the light receiving surface 23a.

  The filter 25 is an optical low-pass filter that allows passage of light that is less than or equal to the wavelength of the reflected light Lr and blocks passage of light that exceeds the wavelength, and a reading port (not shown) formed in the case. It is provided between the imaging lens 27. Thereby, unnecessary light exceeding the wavelength equivalent of the reflected light Lr is prevented from entering the light receiving sensor 23. Further, the imaging lens 27 is constituted by, for example, a lens barrel and a plurality of condensing lenses accommodated in the lens barrel. In the present embodiment, the imaging lens 27 is provided at a reading port (not shown) formed in the case. The incident reflected light Lr is condensed and functions to form a code image of the information code C on the light receiving surface 23 a of the light receiving sensor 23.

  The microcomputer system includes an amplification circuit 31, an A / D conversion circuit 33, a memory 35, an address generation circuit 36, a synchronization signal generation circuit 38, a control circuit 40, an operation switch 42, a liquid crystal display 46, a communication interface 48, and the like. Yes. This microcomputer system is configured around a control circuit 40 and a memory 35 that can function as a microcomputer (information processing apparatus), and the image signal of the information code C imaged by the optical system described above is signaled in hardware and software. It can be processed.

  An image signal (analog signal) output from the light receiving sensor 23 of the optical system is input to the amplifier circuit 31 and amplified by a predetermined gain, and then input to the A / D conversion circuit 33 to convert the analog signal into a digital signal. Is done. The digitized image signal, that is, image data (image information) is input to the memory 35 and stored in the image data storage area of the memory 35. The synchronization signal generation circuit 38 is configured to generate a synchronization signal for the light receiving sensor 23 and the address generation circuit 36. The address generation circuit 36 is based on the synchronization signal supplied from the synchronization signal generation circuit 38. Thus, the storage address of the image data stored in the memory 35 can be generated.

  The memory 35 is configured by a known storage device such as a semiconductor memory device, for example, such as a RAM, a ROM, and other nonvolatile memories. In addition to the above-described image data storage area, the RAM of the memory 35 is configured to be able to secure a work area and a reading condition table that are used by the control circuit 40 in each processing such as arithmetic operation and logical operation. . The ROM stores in advance a predetermined program that can execute reading processing and the like, and a system program that can control each hardware such as the illumination light source 21 and the light receiving sensor 23.

  The control circuit 40 is configured by, for example, a microcomputer that can control the reading device 20 as a whole, and includes a CPU, a system bus, an input / output interface, and the like, and has an information processing function. Various input / output devices (peripheral devices) are connected to the control circuit 40 via a built-in input / output interface. In this embodiment, a power switch 41, an operation switch 42, a liquid crystal display 46, A communication interface 48 or the like is connected. In addition, a host computer HST corresponding to a host system of the reading device 20 can be connected to the communication interface 48.

  The power supply system includes a power switch 41, a battery 49, and the like. When the power switch 41 managed by the control circuit 40 is turned on and off, the conduction of the drive voltage supplied from the battery 49 to each device and each circuit described above is established. Or shut off is controlled. The battery 49 is a secondary battery that can generate a predetermined DC voltage, and corresponds to, for example, a lithium ion battery. In addition, although the structure which receives the electric power supply from the battery 49 was illustrated in FIG. 3, if it is a stationary type structure, you may become a structure which receives an electric power supply from an external commercial power source.

(Display processing)
Next, display processing performed in the display device 10 will be described using the flowchart shown in FIG. In the following, as shown in FIG. 4, for example, a user carrying the portable information code display device 10 reads the information code C by placing the display device 10 on the information code reading device 20 to read the information code C. explain. Further, as a display example on the display device 10, as shown in FIG. 1, an example in which the information code C is displayed as a part of a still image to be switched will be described.

  The display process shown in FIG. 5 is executed, for example, when a user who owns the display device 10 performs a predetermined operation on the operation unit 13. In this display process, first, image display on the display 12 is started in S1. When image display starts in S1, a plurality of images are displayed in order on the display device 12 as shown in the left diagram of FIG. For example, in the example of FIG. 1, the image P1 of the information code C, the image P2 including characters of the airline name, and the image P3 including characters of the flight name of the aircraft are alternately switched to the display device 12. It is displayed. Specifically, when the orientation of the display device 10 is not a predetermined orientation, the display device 10 is set to be switched in order of the image P1, the image P3, and the image P2 at a certain time interval (for example, an interval of 0.2 seconds). . For example, after the image P1 of the information code C is displayed for a certain time (for example, 0.2 seconds), the image P1 of the information code C disappears, and the image P2 including characters of the airline name remains for a certain time (for example, 0 .2 seconds) is displayed. Then, after the image P2 is displayed for a certain time (for example, 0.2 seconds), the image P2 disappears, and the image P3 including the aircraft flight number characters is displayed for a certain time (for example, 0.2 seconds). The Then, after the image P3 is displayed for a certain time (for example, 0.2 seconds), the image P3 disappears and the image P1 is displayed again.

  Thus, after the above-described image display is started in S1, the above-described switching display (displays of images P1, P2, and P3) continues. The display device 10 continuously detects the orientation of the display device 10 after the display is started in S1 and continues the switching display, and whether or not the direction in which the display 12 faces is a predetermined reference direction. (S2). In the process of S <b> 2, the display device 10 determines whether or not the triaxial sensor 15 detects a state in which the display device 12 is directed vertically downward or vertically obliquely downward.

  In this configuration, as shown in FIG. 6, the accelerations αx, αy, αz in the X, Y, and Z axis directions are continuously detected by the triaxial sensor 15, and these accelerations αx, αy, αz are synthesized. Thus, the direction of the acceleration αs applied to the display device 10 can be continuously specified. In the process of S2 performed every predetermined short time, an angle θ formed by the combined acceleration αs and the positive Z-axis at the time of the process of S2 is obtained, and the angle θ is determined for a certain period of time (the above-described other The display duration time of the images P2 and P3 is shorter than, for example, 0.1 second or 0.01 second), and is 0 ° or more and a predetermined threshold θα (for example, 20 °) or less. Judging whether or not. That is, when the angle θ between the direction of the combined acceleration αs and the positive Z-axis direction is 0 ° or more and the threshold θα or less, it is estimated that the gravitational acceleration direction and the Z-axis positive direction are closely related. Since there is a high possibility that the display 12 is downward or diagonally downward, such a state is detected in S2. In this configuration, the angle θ formed by the combined acceleration αs and the positive Z-axis direction is “a value indicating the direction in which the display 12 (display unit) faces”, and “the angle θ is 0 ° or more and the threshold θα or less. Such a case is “when the direction of the display device 12 (display unit) detected by the direction detection unit becomes a predetermined reference direction”. Further, “the direction in which the display 12 faces when the angle θ is 0 ° or more and the threshold θα or less” is the “predetermined reference direction”.

  When it is detected in S2 that the direction in which the display 12 faces is a predetermined reference direction (that is, the angle θ is 0 ° or more and a predetermined threshold θα or less for a certain time or more). If detected, the display on the display 12 is switched to the above-described image P1 of the information code C (FIG. 1 and the like), and the image P1 of the information code C (QR code (registered trademark in the example of FIG. 1)) is displayed. In this state, the display is fixed (S3). As described above, in this configuration, after the display is started in S1, the display switching operation for sequentially switching the display of the images P1, P2, and P3 is performed, and the user moves the display device 10 to the reading device 20 as shown in FIG. When the display 12 is turned vertically downward or diagonally downward by rubbing, the angle θ is not less than 0 ° and not more than a predetermined threshold value θα for a certain time or more. Proceeding to Yes, the display switching operation is interrupted and only the image P1 of the information code C is continuously displayed. On the other hand, after the display in S1 is started, while it is not detected that the direction in which the indicator 12 faces is the predetermined reference direction (that is, “the angle θ is not less than 0 ° and not more than the predetermined threshold θα for a certain period of time or more If the condition “becomes satisfied” is not established, the process continues to No in the process of S2 performed every predetermined short time, and during that time, the above-described display switching operation continues. The above-mentioned “when it is detected that the angle θ is 0 ° or more and a predetermined threshold value θα or less for a certain time or longer” indicates that the display 12 (display unit) is vertically downward or diagonally inclined. This corresponds to “when a downward facing state is detected”.

  In this configuration, when the process proceeds to Yes in S2, the image P1 of the information code C is displayed continuously or intermittently for a certain time until the process proceeds to Yes in S4, and the information code C is quickly displayed by the reading device 20. Make it readable. While the image P1 of the information code C is continuously displayed in this way, the display of the other images P2 and P3 is not performed. Therefore, the process proceeds from Yes in S2 to Yes in S4. If the display device 12 is placed over the reading device 20, the information code C displayed on the display device 12 can be read more reliably by the reading device 20.

  In this configuration, the control circuit 11 that gives a command to the display device 12 corresponds to an example of a “display control unit”. In the display device 12 (display unit), the information code C is part of a moving image or a still image that is switched. It works to display as part. Further, the control circuit 11 corresponding to the “display control unit” uses the display unit 12 (display unit) when the direction of the display unit 12 (display unit) detected by the direction detection unit becomes a predetermined reference direction. Is displayed continuously or intermittently in a configuration in which the information code C can be read by the information code reader 20, and this display state is maintained until a predetermined release condition is satisfied. ing. More specifically, when the direction of the indicator 12 (display unit) detected by the direction detection unit becomes the reference direction, for example, the display as shown in the right diagram of FIG. 1 or FIG. 4 is maintained for a certain period of time. The display state on the display unit 12 (display unit) is fixed for a certain period of time while still images of the information code C having a predetermined size are continuously displayed.

  In S3, “the information code C is displayed continuously or intermittently in a configuration that can be read by the information code reading device 20” is displayed. This display state is an image of the information code C having a fixed size. For example, the image P1 may be displayed intermittently so as to blink at a very short time interval. Further, if the information code C is readable, the information code C may be displayed as a moving image. For example, the information code C of the image P1 may be displayed or the information code C may be changed in size. In addition, as long as the information code C can be deciphered, a pattern or a character may be displayed around the information code C. In addition, a pattern, a character, or the like may be displayed in the code area of the information code C as long as the data can be decoded by error correction.

  By the process of S3, after the “information code C is displayed continuously or intermittently in a configuration that can be read by the information code reading device 20”, until a predetermined time (for example, 5 seconds) continues. The display control is continued. On the other hand, after the processing of S3, “the information code C is continuously or intermittently displayed in a configuration that can be read by the information code reading device 20” and then a predetermined time has elapsed in the display state. Advances to Yes in S4. When the process proceeds to Yes in S4, screen power saving control is performed (S5). The control in S5 may be any control that consumes less power than in the display state of S1 or S3. For example, the control may be an operation for completely stopping the display on the display unit 12. Control for suppressing power (for example, control for turning off the backlight, control for suppressing the amount of light of the backlight, control for displaying as a black screen, etc.) may be used. Alternatively, sleep control that intermittently drives the CPU mounted on the display device 10 or suppresses the drive clock may be used.

  In this configuration, the control circuit 11 corresponds to an example of a “power saving control unit” and functions to perform predetermined power saving control (the above-described power saving control performed in S5) after a predetermined release condition is satisfied. To do. Further, in this configuration, for example, after advancing to Yes in S2, a predetermined time has elapsed since a certain time has elapsed (that is, the display 12 (display unit) is directed vertically downward or diagonally downward). ) Is equivalent to “satisfaction of a predetermined release condition”.

  In the example of FIG. 5, when the predetermined time has elapsed after proceeding to Yes in S <b> 2, the process proceeds to Yes in S <b> 4 and power saving control is performed in S <b> 5. If a predetermined release operation is performed on 13, the process may proceed to Yes in S4. In this case, the release operation is equivalent to “establishment of a predetermined release condition”.

(Main effects of this configuration)
According to this configuration, the information code C can be displayed as a part of a moving image or as a part of a still image to be switched, and at the time of reading, the information code C is stabilized in a readable display state. Can be read more reliably.
Specifically, when the direction of the display 12 (display unit) detected by the three-axis sensor 15 and the control circuit 11 (direction detection unit) becomes a predetermined reference direction, the display 12 (display unit) The information code C can be displayed continuously or intermittently in a configuration in which the information code C can be read by the information code reader 20. In this configuration, for example, as shown in FIG. 4, when the user points the display 12 (display unit) in the reference direction (vertically downward or diagonally downward in the example of FIG. 4), the display 12 (display) is displayed. The reading device 20 only needs to be arranged so as to be able to read, and if it is used in such an arrangement, when the decoy operation in the reference direction is performed (that is, when the reading device 20 reads the information code C). The information code C can be maintained in a readable display state and can be read stably.
When such measures are not taken, for example, when the display device 12 (display unit) is put over the information code reading device 20, the information code C is not displayed or the information code C cannot be read. In this case, there is a concern that reading may be delayed until the information code C is in a readable display state. On the other hand, according to the above-described configuration, as shown in FIG. 4, when the decoy operation for causing the information code reader 20 to read the information code C is performed (that is, the display 12 (display unit) is set in the reference direction). Since the information code C is maintained in a readable display state when the pointing operation is performed, the information code C can be read more quickly and reliably. Accordingly, the timing at which the display 12 (display unit) is directed to the information code reading device 20 and the timing at which the display 12 is actually read are not greatly misaligned, and reading is performed from the time when the display 12 (display unit) is directed to the information code reading device 20. Since a large time lag is unlikely to occur until a result is obtained, it is possible to more effectively suppress a decrease in reading feeling.

Further, in this configuration, the three-axis sensor 15 and the control circuit 11 (direction detection unit) can detect a state in which the display 12 (display unit) faces vertically downward or obliquely downward. The control circuit 11 corresponding to the display control unit uses the display unit 12 (display unit) when the direction detection unit detects that the display unit 12 (display unit) is directed vertically downward or obliquely downward. Is displayed in a configuration in which the information code C can be read by the information code reading device 20.
In this configuration, the information code C can be displayed as a part of a moving image or a part of a still image to be switched, and the display device 12 (display unit) can be turned downward or diagonally downward. It is advantageous when you want to go. In particular, when the display device 12 (display unit) is used in such a manner that the display 12 (display unit) is tilted downward or obliquely downward, it is difficult for the user to visually check the display content on the display unit 12 (display unit) when reading. When reading delay or failure occurs, there is a problem that it is difficult to determine whether the display timing does not match and the delay or failure has occurred, or due to other factors, but according to this configuration, the display timing is Since the delay and failure due to mismatching can be significantly reduced, the above problem can be reliably suppressed.

Further, in this configuration, the control circuit 11 corresponding to the display control unit, for example, when the direction of the display unit 12 (display unit) detected by the direction detection unit becomes the reference direction, for example, the display unit 12 (display unit) ) Is fixed in a state where the information code C is continuously displayed.
In this configuration, since the display of the information code C can be fixed when the display device 12 (display unit) is oriented in the reference direction, the information code C is displayed as a part of a moving image or a part of a still image to be switched. Thus, at the time of reading, more stable code display is possible, and reading delays and failures due to a change in the display state can be further suppressed.

Further, in this configuration, the control circuit 11 corresponding to the display control unit uses the display unit 12 (display unit) when the direction of the display unit 12 (display unit) detected by the direction detection unit becomes the reference direction. Is displayed in a state in which the information code C can be read by the information code reader 20, and the display state is maintained until a predetermined release condition is satisfied. And after predetermined cancellation | release conditions are satisfied, it becomes the structure which performs predetermined power saving control by a power saving control part like S5 of FIG.
According to this configuration, when the display 12 (display unit) is read in the reference direction, the display of the information code C can be stabilized and easily read until the release condition is satisfied. After the release condition is established, it is possible to smoothly save power.

In addition, as shown in FIG. 1, the control circuit 11 corresponding to the display control unit displays the information code C in a state in which the display on the display unit 12 (display unit) can be read by the information code reading device 20. The state (for example, the state in which the image P1 is displayed) and the state in which another figure or other information different from the configuration of the information code C that can be read by the information code reading device 20 is displayed (for example, the image P2) And the state in which the image P3 is displayed). When at least the direction of the display device 12 (display unit) detected by the direction detection unit becomes the reference direction, for example, only the image P1 is continuously displayed and displayed on the display device 12 (display unit). The state is maintained in a state where the information code C is displayed in a configuration that can be read by the information code reading device 20.
According to this configuration, as conceptually shown in the left diagram of FIG. 1, the display state of the display 12 (display unit) is displayed as a display state in which the information code C is displayed, another figure or other information. Therefore, the information code C can be easily displayed in association with another figure or other information. Then, while enabling such a plurality of types of display, the information code C is stably displayed when reading (that is, when the display 12 (display unit) is directed in the reference direction), and the information is displayed. The code C can be read more quickly and more reliably.

  In the example of FIG. 1, an image of a QR code (registered trademark) linked to a boarding pass is illustrated as the image P1 of the information code C, and is related to information (information on the boarding pass) recorded in the QR code. As an image, an image P2 for specifying an airline of an aircraft that can be boarded with the boarding pass and an image P3 for specifying a flight name of an aircraft that can be boarded with the boarding pass are displayed by switching. . In this way, in normal times (when the display device 12 is not oriented in the reference direction), the type of information code C1 can be determined by viewing the other images P2 and P3. And the information code C1 can be read properly.

[Second Embodiment]
Hereinafter, a second embodiment embodying the present invention will be described.
The second embodiment differs from the first embodiment only in the threshold value θα used in S2 of FIG. 5, and is otherwise the same as the first embodiment. Therefore, the detailed description is omitted as it is the same as the first embodiment except for the threshold value θα, and FIGS. 1 to 6 are appropriately referred to. The contents shown in FIGS. 1 to 6 are the same as those in the first embodiment.

  In this configuration, the control circuit 11 corresponding to the display control unit has recognized that the change in the direction of the indicator 12 (display unit) detected by the direction detection unit has reached a predetermined change state approaching the reference direction. In this case, the display state on the display device 12 (display unit) is maintained in a state where the information code C is displayed in a configuration that can be read by the information code reader 20.

  Even in this configuration, after starting the display in S1, the accelerations αx, αy, and αz in the X, Y, and Z axis directions are continuously detected by the triaxial sensor 15 as shown in FIG. The direction of the acceleration αs applied to the display device 10 can be continuously specified by combining αx, αy, and αz. Even in this configuration, in the process of S2 performed every predetermined short time, an angle θ formed by the combined acceleration αs and the positive Z-axis at the time of the process of S2 is obtained, and the angle θ is determined for a certain period of time. (It is a time shorter than the display continuation time of the other images P2 and P3 described above, for example, 0.1 seconds or 0.01 seconds) or more, and whether or not 0 ° or more and a predetermined threshold value θα or less Judgment. However, this θα is set to 90 °, for example, and when the angle θ becomes 90 ° or less for a certain time, the process proceeds to Yes in S2. In other words, in this configuration, for example, a direction within a certain angle (for example, a direction within 10 °) with respect to the vertical downward direction or the vertical downward direction is a “reference direction”, and the angle θ is 90 ° or less. The state in which this state continues for a certain period of time corresponds to “a predetermined change state in which the change in the direction of the display 12 (display unit) detected by the direction detection unit approaches the reference direction”.

As described above, in this configuration, the control circuit 11 corresponding to the display control unit changes the direction of the indicator 12 (display unit) detected by the direction detection unit to a predetermined change state approaching the reference direction. If this is recognized, the process proceeds to Yes in S2. In this case, as in the first embodiment, the information code C can be read by the information code reading device 20 in S3 as to the display state on the display unit 12 (display unit). It is the structure maintained with the state displayed by the structure which becomes.
In this configuration, before the display device 12 (display unit) is completely oriented in the reference direction, the state that changes to the reference direction is pre-read, and the display of the information code C is shifted to a display state that can be read earlier, and is stable. It can be made. Therefore, it is possible to prepare to read the information code C before the display device 12 (display unit) is completely in the reference direction, and to complete reading of the information code earlier.

[Modification Example of Second Embodiment]
For example, all the configurations of the first embodiment may be included, and further, a condition for proceeding to Yes may be added in the determination process of S2 in FIG. Specifically, in addition to the condition for proceeding to Yes in S2 of the first embodiment, the process may proceed to Yes in S2 even when “the decrease amount Δθ of the angle θ in a predetermined short time is a predetermined value or more”. . That is, in this configuration, when the display 12 is stationary in a state where the display 12 is completely vertically downward, the angle θ is 0. Therefore, when the angle θ is drastically decreased and approaches 0, the display 12 There is a high possibility that an operation has been carried out. Therefore, after S1, a decrease amount Δθ of the angle θ is obtained every predetermined short time (for example, every several ms or every several tens of ms), and when the decrease amount Δθ is a certain value or more (for example, 40 ° or more), Proceed to Yes at S2. Even in such a configuration, before the display device 12 (display unit) is completely directed to the reference direction, the state that changes to the reference direction is pre-read, and the display of the information code C is shifted to a display state that can be read early. Can be stabilized. Therefore, it is possible to prepare to read the information code C before the display device 12 (display unit) is completely in the reference direction, and to complete reading of the information code earlier. In this configuration as well, “the direction in which the display 12 faces when the angle θ is 0 ° or more and the threshold θα or less” is the “reference direction” as in the first embodiment.

[Third embodiment]
Hereinafter, a third embodiment embodying the present invention will be described.
The third embodiment is different from the first embodiment only in the specific example of the display process of S1 in FIG. 5, and is otherwise the same as the first embodiment. Accordingly, the contents of FIGS. 1 to 6 are the same as those of the first embodiment, and therefore FIGS. 1 to 6 will be appropriately referred to below. Specifically, in the process of S1 of the first embodiment, the images P1, P2, and P3 are sequentially switched and displayed. However, in the third embodiment, the image P2 or the image P3 is displayed during the process of S1. Or both of these are displayed, and the image P1 is not displayed. Thus, only the display method in S1 is different from that of the first embodiment, and other than that is the same as that of the first embodiment.

  In this configuration, after the process of S1 is started and before the process proceeds to Yes in S2 (that is, when the direction of the display 12 (display unit) detected by the direction detection unit is not the reference direction), the information code C It is assumed that other figures or other information other than the image P1 are continuously or temporarily displayed. For example, in the example of FIG. 7, images P2 and P3 are illustrated as other figures or other information other than the image P1 of the information code C. Until the process proceeds to Yes in S2, the images P2 and P3 are displayed. Either or both are displayed (see the right side of the lower diagram in FIG. 7). There are various display methods for the images P2 and P3 at this time. For example, only the image P2 may be continuously displayed until the process proceeds to Yes in S2, and only the image P3 is displayed until the process proceeds to Yes in S2. You may display continuously (the lower right side of FIG. 7 shows this example). Or you may switch and display the image P2 and the image P3 for every fixed time until it progresses to Yes in S2. By doing in this way, while the direction of the display 12 (display unit) is not the reference direction, an image other than the information code C can be displayed. This makes it easier for the user to recognize figures and information other than the information code when it is upward and easy to see. On the other hand, when the determination process of S2 is performed by the same method as in the first embodiment and the process proceeds to Yes in S2, the process of S3 may be performed by the same method as in the first embodiment. Is directed to the reference direction, the information code C is displayed in a readable state on the display device 12 as shown in the lower left side of FIG.

Also in this configuration, the control circuit 11 corresponding to the display control unit displays the information on the display 12 (display unit) and displays the information code C that can be read by the information code reader 20 (for example, an image). The state where P1 is displayed and the state where another figure or other information different from the configuration of the information code C that can be read by the information code reader 20 is displayed (for example, the image P2 and the image P3 are displayed). It is configured to be changeable. When at least the direction of the display device 12 (display unit) detected by the direction detection unit becomes the reference direction, for example, only the image P1 is continuously displayed and displayed on the display device 12 (display unit). The state is maintained in a state where the information code C is displayed in a configuration that can be read by the information code reading device 20.
According to this configuration, as conceptually shown in the upper diagram of FIG. 7, the display state of the display 12 (display unit) is displayed as a display state in which the information code C is displayed, another figure or other information. Therefore, the information code C can be easily displayed in association with another figure or other information. Then, while enabling such a plurality of types of display, the information code C is stably displayed when reading (that is, when the display 12 (display unit) is directed in the reference direction), and the information is displayed. The code C can be read more quickly and more reliably.

Further, in this configuration, the control circuit 11 corresponding to the display control unit, when the direction of the indicator 12 (display unit) detected by the direction detection unit is not the reference direction (that is, in S2 after S1 starts) Until the process proceeds to Yes), the display state on the display device 12 (display unit) is set to a state in which another figure or other information is displayed continuously or temporarily. Then, when the direction of the display 12 (display unit) detected by the direction detection unit becomes the reference direction (that is, when the process proceeds to Yes in S2), the display state on the display 12 (display unit) is changed. The information code C is maintained in a state of being displayed in a configuration that can be read by the information code reading device 20.
In this configuration, when the display 12 (display unit) is not oriented in the reference direction, another figure or other information can be displayed, so that the user can display the display 12 (display unit). When it is easy to visually recognize, another figure or other information is easily displayed, and the user can easily recognize another figure or other information. On the other hand, when it is difficult for the user to visually recognize the display device 12 (display unit) (when the display unit is oriented in the reference direction), the information code C is easily displayed stably. Other figures or other information can be displayed more efficiently at a timing more suitable for each display.

[Fourth embodiment]
The fourth embodiment that embodies the present invention will be described below.
The fourth embodiment differs from the first embodiment only in the specific example of the display process in S1 of FIG. 5 and the specific example of the display process in S3, and is otherwise the same as the first embodiment. For example, the hardware configurations of FIGS. 2, 3, and 4 are the same as those of the first embodiment, and the flow of the display process of FIG. 5 and the concept of FIG. 6 are the same as those of the first embodiment. Therefore, description will be made with reference to FIGS.

  In the above embodiment, in the configuration of the portable information code display device 10, the configuration in which the information code C is displayed as a part of the still image to be switched on the display device 12 is illustrated. The flow of this moving image is illustrated in FIGS. 8A to 8F. In this example, the screen changes in the order of FIGS. 8 (A), (B), (C), (D), (E), and (F), and the symbols in the code area of the information code C Is displayed so as to gradually change. Specifically, a moving image is displayed so that a ball that has entered from the left side of the code area moves like images P22 and P23 in FIGS. 8B and 8C as image P21 in FIG. 8A. As shown in images P24, P25, and P26 in FIGS. 8D to 8F, a moving image is displayed so as to stop in a vertically long state. Further, the light cell and the dark cell in the code area are configured so that the density of the light cell gradually changes except in the vicinity of the three position detection patterns. In the image P21 in FIG. The position of the color cell is represented in black, and the density at that position is gradually reduced so that a light color cell appears as in the image P22 in FIG. 8B. Further, as shown in the image P23 in FIG. 8C, the density of the light cell gradually increases, and then the moving image so that the position of the light cell is expressed in black as in the image P24 in FIG. 8D. Display is made. Thereafter, the density of the light cell gradually decreases, and the light cell emerges as shown in the image P25 of FIG. 8E. Thereafter, the density of the light cell gradually decreases, and FIG. As shown in the image P26, the light color cell changes so as to be expressed in white.

  Since the moving image is displayed in this manner, the information code C is readable (FIGS. 8B, 8C, 8E, and 8E) until the process proceeds to S2 after the start of the process of S1 in FIG. (F) state) and an unreadable state (states of FIGS. 8A and 8D). In the states of FIGS. 8B, 8C, 8E, and 8F, the position of the rugby ball can be corrected by a known error correction method. The data recorded in the area can be decoded without any trouble.

  While such a moving image display is being performed, in S2, a determination process similar to that of the first embodiment is performed, and when it is determined that the display device 12 faces the reference direction described above. The process proceeds to Yes in S2. When the process proceeds to Yes in S2, the display process similar to that of the first embodiment is performed in S3, and the information code C is displayed on the display unit 12 so that it can be read by the reading device 20. The display at this time is, for example, a continuous image of only the information code C obtained by extracting only the information code C displayed superimposed on the ball as shown in FIGS. 8B, 8C, 8E, and 8F. 8B may be fixedly displayed as a still image, and any one of the images shown in FIGS. 8B, 8C, 8E, and 8F (an image in which data can be decoded by correcting the ball portion by error correction) is a still image. As a continuous display. In this way, if an image of only the information code C or an image of the information code C in which a part of the code area is expressed in a form that can be corrected by a symbol or a symbol is displayed for a certain period of time in S3, the constant is obtained. If the display 12 of such a display screen is turned toward the reading device 20 during the time, the reading device 20 can reliably read the information code C.

In this configuration, the control circuit 11 corresponding to the display control unit displays the display state on the display 12 (display unit) in a state where the information code C is displayed in a configuration that can be read by the information code reading device 20 (for example, 8B) and a state in which the information code C is displayed in a configuration that cannot be read by the information code reader 20 (for example, a state as shown in FIG. 8A). ing. When at least the direction of the display 12 (display unit) detected by the direction detection unit becomes the reference direction, the information code C indicates the display state on the display 12 (display unit). The state is displayed in a readable configuration (for example, the state as shown in FIG. 8B or the state of only the information code C).
In this configuration, the information code C can be displayed by a novel display method having a characteristic of changing between a readable display state and an unreadable display state. On the other hand, in such a dynamic display, there is a problem that the information code C cannot be read at all if the display device 12 (display unit) is deceived in an unreadable display state. When reading the display 12 (display unit) in the reference direction, the display of the information code C can be maintained in a readable display state. For this reason, it is possible to read the information code C more reliably while enabling a novel display in which the information code C is largely changed between a readable display state and an unreadable display state.

[Other Embodiments]
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  In the first to third embodiments, an example of switching and displaying the image P1 of the information code C and another figure related to the information code C or other information images (images P2 and P3) is shown. It is not limited to examples. For example, if the information code C records the name of a product, the name of a product provider (product provider, etc.), or the address of a site operated by the product provider, an image of the information code C and the information code Information and graphics of products specified by the data recorded in C (images of the products themselves, product name information of the products, trademarks of the products, etc.) may be switched and displayed. Alternatively, the entity (company or individual) identified by the data recorded in the information code C, and information or figure identifying the entity (image of the entity itself, entity name information of the entity (company name or individual) Name) and the trademark of the subject) may be switched and displayed.

  In the above embodiment, in the display process of S3 in the flowchart shown in FIG. 5, the display state on the display device 12 is fixed in a state in which the information code C is continuously displayed in a configuration that can be read by the reading device 20. A configuration for performing the processing is illustrated. However, in any embodiment, in the display process of S3, the display state on the display device 12 is a state in which the information code C is continuously or intermittently displayed in a configuration in which the reading device 20 can read the information code C. If so, other display processing may be performed. For example, as shown in FIG. 9A, after the display is started in S3 and before the process proceeds to Yes in S4, the information code C can be read by the reading device 20 (in FIG. 9A). In a state in which each light color cell and each dark color cell are displayed), the information code C1 in a dark display state of the dark cell and the information code C2 in a dark state of the dark color cell are displayed at regular intervals. It may be displayed so as to be switched. Or the structure displayed intermittently so that the information code C like the left side of FIG. 9 (A) may blink may be sufficient. In this case, it is desirable that the period during which the information code C disappears during the blinking display is very short. Alternatively, as shown in FIG. 9 (B), a state in which reading by the reading device 20 is possible (in FIG. 9 (B), a state in which each light cell and each dark cell constituting the information code C are all displayed). Thus, the information code C3 and the information code C2 whose size is smaller than the information code C3 may be switched continuously or intermittently while the size of the information code C is changed.

  In the above embodiment, in the flowchart shown in FIG. 5, after the information code C is displayed in a configuration that can be read by the reading device 20 (that is, after displaying S3), a predetermined time has elapsed in S4. However, instead of the determination process of S4, another determination process may be performed. For example, when the state in which the display device 12 faces the reference direction (for example, vertically downward or vertically diagonally downward) is detected in S2, and the process proceeds to Yes in S2, the display device 12 may face a direction other than the reference direction. If detected, the process may proceed to Yes in S4. In this case, after proceeding to Yes in S2, the process of S4 is periodically performed every predetermined short time, and if the display 12 remains in the reference direction, the process proceeds to No, and the display 12 If it is in a state of facing a direction other than the direction (for example, when it is detected that the angle θ exceeds the threshold θα for a predetermined time (for example, 1 second) or more), the process proceeds to Yes in S4. . In this example, detection of a state in which the display device 12 faces in a direction other than the reference direction corresponds to “establishment of a predetermined release condition”. Further, “establishment of the predetermined release condition” is not limited to these examples, and may be, for example, “a predetermined operation has been performed on the operation unit 13”. In this case, instead of the determination process of S4, a “process for determining whether or not a predetermined operation has been performed on the operation unit 13” may be performed. When a predetermined operation is performed on the operation unit 13 In S4, the process proceeds to Yes. Otherwise, the process proceeds to No.

  In the above embodiment, after proceeding to Yes in S4 in the process of FIG. 5 (that is, after a predetermined release condition is satisfied), power saving control is performed in S5, for example, the display state of the display device 12 is terminated and displayed. The display on the display unit 12 has been erased. However, the present invention is not limited to this example. In any embodiment, after the process proceeds to Yes in S4 (after a predetermined release condition is satisfied), the display unit 12 receives information other than the information code C. It is good also as a structure switched so that a still image or a moving image may be displayed. For example, in any embodiment, when the process proceeds to Yes in S4, the process may be switched to a still image or a moving image including or not including the information code C by returning to S1 again.

  In the above embodiment, the case where the angle θ between the direction of the resultant acceleration αs and the positive Z-axis direction is not less than 0 ° and not more than the predetermined threshold value θα is described as “the display portion is directed vertically downward or vertically obliquely downward. However, the present invention is not limited to this example. For example, in any embodiment, in the state where the angle θ between the direction of the combined acceleration αs and the positive Z-axis direction is 0 ° or more and a predetermined threshold θα or less, the acceleration αx, αy, αz in each axis direction When a stationary state in which the amount of change Δαx, Δαy, Δαz is less than a predetermined value Δα is detected for a certain period of time (for example, 1 second or 0.1 second), It may be detected as “a state facing downward”. In this case, “the angle θ is not less than 0 ° and not more than the threshold θα, and the change amounts Δαx, Δαy, Δαz of the accelerations αx, αy, αz in the respective axial directions are less than the predetermined value Δα for a certain period of time. “When a stationary state is detected” is “when the direction of the display 12 detected by the direction detection unit becomes a predetermined reference direction”. In addition, “when the angle θ is 0 ° or more and the threshold θα or less, the change amounts Δαx, Δαy, Δαz of the accelerations αx, αy, αz in each axial direction are less than the predetermined value Δα for a certain period of time. The direction in which the display 12 faces when a stationary state is detected is the “predetermined reference direction”.

  In the said embodiment, although the example which detects the direction of the indicator 12 (display part) by the triaxial sensor 15 was shown, it is not restricted to this example. For example, as shown in FIG. 4, when reading the information code C displayed on the display device 12 by turning the display device 12 downward with respect to the reading device 20 that emits illumination light upward, it is located near the display device 12. A light amount sensor may be arranged, and when the light amount detected by the light amount sensor becomes a certain value or more, the process may proceed to Yes in S2. In this case, while the light amount detected by the light amount sensor is less than a certain value, the process continues to No in S2. In this case, “the direction in which the light amount detected by the light amount sensor is equal to or greater than a certain value” corresponds to the reference direction.

  In the above embodiment, the method of detecting the direction of the vertical direction with the display device 10 as a reference is exemplified by the acceleration sensor. However, in any of the embodiments, various known methods can be used as long as the vertical direction can be detected. Can be used. For example, a method of specifying a vertical direction using an acceleration sensor and a geomagnetic sensor, or a method of specifying a vertical direction using an acceleration sensor and a gyro sensor may be used. In any method, if the vertical direction can be specified, the angle θ between the vertical direction and the positive Z-axis direction can be specified.

  In the above-described embodiment, the reading device 20 is arranged at a position lower than the operation position by the user, and the reading device 20 reads the information code that has been placed upward. However, the present invention is not limited to this example. For example, when the reading device 20 is attached to a wall or the like and the visual field range of the light receiving sensor 23 is set sideways (horizontal), in S2 of S5, the Z axis positive direction and the horizontal direction (perpendicular to the vertical direction). It is determined whether or not the angle β formed with the plane direction is 0 ° or more and a threshold value β1 (for example, 20 °) or less. If yes, the process proceeds to Yes in S2, otherwise No. You may make it progress to. In this case, the direction of the display 12 when the angle β formed by the positive Z-axis direction and the horizontal direction (the plane direction orthogonal to the vertical direction) is 0 ° or more and the threshold value β1 (for example, 20 °) or less is the reference direction. Equivalent to.

DESCRIPTION OF SYMBOLS 10 ... Portable information code display apparatus 11 ... Control circuit (display control part, direction detection part, power saving control part)
12. Display (display unit)
15 ... Triaxial sensor (Direction detector)
20 ... Information code reader C ... Information code

Claims (8)

A display unit capable of displaying an image;
In the display unit, a display control unit for displaying the information code as a part of a moving image or a part of a still image to be switched,
A direction detection unit capable of detecting a direction in which the display unit faces;
With
The display control unit can read the information code on the display unit by the information code reader when the direction of the display unit detected by the direction detection unit becomes a predetermined reference direction. A portable information code display device characterized in that it is in a state of being continuously or intermittently displayed with the following structure. The direction detection unit is capable of detecting a state in which the display unit faces vertically downward or vertically obliquely downward,
The display control unit is configured to display a display state on the display unit when the direction detection unit detects a state in which the display unit is directed vertically downward or obliquely downward, and the information code is the information code reading device. The portable information code display device according to claim 1, wherein the portable information code display device is in a state of being displayed in a configuration that can be read by the mobile phone.   The display control unit displays the display state on the display unit when the information code is continuously displayed when the direction of the display unit detected by the direction detection unit becomes the reference direction. The portable information code display device according to claim 1 or 2, wherein the portable information code display device is fixed. The display control unit reads the display state on the display unit with the information code reading device when the direction of the display unit detected by the direction detection unit becomes the reference direction. The state is displayed in a possible configuration and the display state is maintained until a predetermined release condition is satisfied,
The portable type according to any one of claims 1 to 3, further comprising a power saving control unit that performs predetermined power saving control after the predetermined release condition is satisfied. Information code display device.   When the display control unit recognizes that the change in the direction of the display unit detected by the direction detection unit is a predetermined change state approaching the reference direction, the display state on the display unit is The portable information code display device according to any one of claims 1 to 4, wherein the information code is maintained in a state of being displayed in a configuration that can be read by the information code reader. The display control unit
Another view in which the display on the display unit is different from the state in which the information code that is readable by the information code reader is displayed and the configuration of the information code that can be read by the information code reader. Or other information is displayed and can be changed.
When at least the direction of the display unit detected by the direction detection unit becomes the reference direction, the display state on the display unit is displayed in a configuration in which the information code can be read by the information code reader. The portable information code display device according to any one of claims 1 to 5, wherein the portable information code display device is maintained in a state in which the portable information code is maintained. The display control unit
When the direction of the display unit detected by the direction detection unit is not the reference direction, the display state on the display unit is a state in which the other figure or the other information is displayed continuously or temporarily. age,
When the direction of the display unit detected by the direction detection unit becomes the reference direction, the display state on the display unit is displayed in a configuration in which the information code can be read by the information code reader. 7. The portable information code display device according to claim 6, wherein the portable information code display device is maintained in a state where The display control unit
The display state on the display unit is a state in which the information code is displayed in a configuration that can be read by the information code reader, and a state in which the information code is displayed in a configuration that cannot be read by the information code reader. Is configured to be changeable,
When at least the direction of the display unit detected by the direction detection unit becomes the reference direction, the display state on the display unit is displayed in a configuration in which the information code can be read by the information code reader. The portable information code display device according to any one of claims 1 to 7, wherein the portable information code display device is in a closed state.

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