JP2019040492A - Portable type information code display apparatus - Google Patents

Abstract

To provide an arrangement which can suppress failure of reading an information code displayed on a screen.SOLUTION: An information code C is displayed in an initial display area So of a display screen 24a by an operation of a touch panel 24. If there is determined an overlapped state in which at least a part of a touch area T of the detected display area 24a is overlapped with the initial display area So, then the initial display area So is changed to a display area S in order to prevent the display screen 24a from being overlapped with the touch area T.SELECTED DRAWING: Figure 4

Description

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

  At present, information codes such as barcodes and QR codes (registered trademark) are used for various purposes, and their usage purposes are also diversifying. In particular, in recent years, with the spread of QR codes and the like, it is common for retail stores and convenience stores to read information codes displayed on a display screen of a mobile terminal such as a smartphone for settlement or coupons. It has become to.

  As a technique for causing the reading device to read the information code displayed on the screen as described above, for example, a reading device disclosed in Patent Document 1 below is known. In this reading device, image data including the information code is acquired by scanning the information code displayed on the screen by the scanner device, and distortion correction and rotation correction are performed so that the rectangular area extracted from the image data becomes a rectangle. By doing so, image data of an easily readable information code is generated.

JP 2009-140207 A

  By the way, when the reading device reads the information code displayed on the screen as described above, the display screen on which the information code is displayed needs to be directed to the reading port of the reading device. I cannot see the displayed screen. Then, if a part of the information code is hidden because the finger holding the mobile terminal is unintentionally applied to the display screen, decoding of the information code may fail. This is because the portable terminal needs to be firmly grasped because it is heavier than the sheet such as a ticket, so that the finger that is grasped is likely to be applied to the information code displayed on the display screen.

  In particular, the user may not be able to recognize that a part of the information code is hidden because the display screen is directed to the reading port. In such a case, the display cannot be decoded. A decoding failure is notified after the information code of the state is kept on the reading port. For this reason, there is a problem that not only the cause of the decoding failure is not known, but also that the time for which the information code is tricked is wasted and the reading of the information code is hindered. In particular, if an information gate in a display state that cannot be decoded as described above is kept on the reading port at an entrance gate or the like where smooth information code reading is required, smooth entry is hindered. .

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a configuration capable of suppressing failure of reading an information code displayed on the screen.

In order to achieve the above object, a portable information code display device (10) according to claim 1 of the claims includes:
A display unit (24) for displaying the information code (C) in a predetermined display range (So, S) of the display screen (24a);
A detection unit (24) for detecting a touch range (T) touched on the display screen;
A determination unit (21) for determining whether or not at least a part of the touch range detected by the detection unit overlaps the predetermined display range;
A display control unit (21) that changes the predetermined display range so as to reduce an overlap area with the touch range on the display screen when the determination unit determines that the overlap state;
It is characterized by providing.

A portable information code display device (10) according to claim 4
A display unit (24) for displaying the information code (C) in a predetermined display range (So) of the display screen (24a);
A detection unit (24) for detecting a touch range (T) touched on the display screen;
A determination unit (21) for determining whether or not at least a part of the touch range detected by the detection unit overlaps the predetermined display range;
An informing unit (26, 27) for informing the user to cancel the touch state in which the display screen is touched when the determining unit determines that the overlapping state is present;
It is characterized by providing.
In addition, the code | symbol in each said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  In the invention of claim 1, the information code is displayed in a predetermined display range of the display screen by the display unit, and at least a part of the touch range with respect to the display screen detected by the detection unit is overlapped with the predetermined display range. If the determination unit determines that there is, the display control unit changes the predetermined display range so as to reduce the overlapping area with the touch range on the display screen.

  As a result, if a part of the information code is hidden because the finger holding the mobile terminal unintentionally touches the display screen, the position where the information code is displayed on the display screen It can be changed to a position that is difficult to hide. Therefore, reading failure of the information code displayed on the screen can be suppressed.

  In the invention of claim 2, when the determination unit determines that the state is overlapped, the predetermined display range is maximized at a position not overlapping with the touch range on the display screen in order to eliminate the overlap with the touch range on the display screen. It is changed by the display control unit. As a result, the information code can be displayed in a larger size at a position where the finger is not touched in the display screen, so that reading failure of the information code displayed on the screen can be reliably suppressed.

  In the invention of claim 3, when the size of the predetermined display range changed by the display control unit is less than the predetermined size, the notification unit performs notification that prompts the user to cancel the touch state where the display screen is touched. . For this reason, when the predetermined size is set to the size of an information code that can ensure a cell size that can be read by a normal reader, for example, the finger is not touched on the display screen. If the cell size of the displayed information code is not readable by a normal reading device, a notification that prompts the user to cancel the touch state is issued. Thereby, it is possible to make the information code on the display screen difficult to be hidden by the user who has received the notification re-griping so as to cancel the touch state. On the other hand, if the size of the predetermined display range changed by the display control unit is greater than or equal to the predetermined size, it is determined that the information code can be read in the changed display state, and the touch state is urged to be released. Since notification is not performed, unnecessary notification can be eliminated.

  In the invention of claim 4, the information code is displayed in the predetermined display range of the display screen by the display unit, and at least a part of the touch range with respect to the display screen detected by the detection unit is overlapped with the predetermined display range. If the determination unit determines that there is, the notification unit performs notification that prompts the user to cancel the touch state in which the display screen is touched.

  For this reason, if a part of the information code is hidden because the finger holding the mobile terminal is unintentionally touching the display screen, a notification is made to cancel the touch state. As a result, the user who has received the notification re-holds the touch so as to cancel the touch state, so that the information code on the display screen is not hidden, so that reading failure of the information code displayed on the screen can be suppressed.

  In the invention of claim 5, when the overlap area between the touch range and the predetermined display range exceeds a predetermined value, the overlap state is determined by the determination unit. For this reason, for example, since the displayed information code has an error correction function, when the predetermined value is set according to an error correctable range, the touch range and the predetermined display range partially overlap. If it is an information code in a display state that can be corrected even if it is, it can be read by the reading device in that display state without being determined as an overlapping state. As a result, it is possible to eliminate processing that unnecessarily changes even the position of the readable information code in the display state.

  According to the sixth aspect of the present invention, when the direction in which the display screen detected by the screen direction detection unit faces is within a predetermined angle range, display control is performed according to the touch range. For this reason, for example, when the predetermined angle range is set in accordance with an angle range in which it is estimated that the display screen is directed to the reading device, the detection screen is directed toward the user. The predetermined display range is not changed. That is, in the case where it is estimated that the display screen is not directed to the reading device, it is not necessary to change the position of the information code in the first place, and unnecessary processing in such a state can be eliminated. .

1 is a perspective view schematically showing a mobile terminal according to a first embodiment of the present invention. FIG. 2 is a block diagram schematically showing an electrical configuration of the mobile terminal in FIG. 1. It is a flowchart which illustrates the flow of the information code display process performed with a portable terminal in 1st Embodiment. FIG. 4A is an explanatory diagram for explaining a state in which a finger is placed on the information code displayed on the screen in the initial display range, and FIG. 4B shows the information code in the changed display range. It is explanatory drawing explaining the state which is displaying the screen by 1 time. FIG. 5A is an explanatory diagram for explaining a state where a finger is placed on the information code displayed on the screen in the initial display range, and FIG. 5B shows the information code in the changed display range. It is explanatory drawing explaining the state which is reduced and displayed on the screen. FIG. 6A is an explanatory diagram for explaining a state where a finger is placed on the information code displayed on the screen in the initial display range, and FIG. 6B shows the information code in the changed display range. It is explanatory drawing explaining the state currently displayed on the screen by reduction. It is a flowchart which illustrates the flow of the information code display process performed with a portable terminal in 2nd Embodiment. It is a flowchart which illustrates the flow of the information code display process performed with a portable terminal in 4th Embodiment. It is explanatory drawing explaining the relationship between the state which orient | assigned the display screen to the reader, and a screen direction.

[First Embodiment]
Hereinafter, a portable terminal to which a portable information code display device according to a first embodiment of the present invention is applied will be described with reference to the drawings.
A portable terminal 10 shown in FIGS. 1 and 2 is a portable information code display device for displaying an information code C to be read by the reading device 1 on a screen. For example, a mobile phone (smart phone) on which a predetermined application program is installed. ). As shown in FIG. 1, the mobile terminal 10 is a thin box-shaped device that can be held by one hand and has a small distance (thickness) between a front surface 11a on which a display screen 24a is provided and a rear surface 11b parallel to the front surface 11a. The case 11 forms an outer shell.

  As shown in FIG. 2, the portable terminal 10 includes a control unit 21 including a CPU, a storage unit 22 including a ROM, a RAM, and a nonvolatile memory, a light receiving sensor (for example, a C-MOS area sensor, a CCD area). Communication configured as a communication interface for communicating with an imaging unit 23 configured as a camera including a sensor, a touch panel 24, an operation unit 25, a speaker 26, a vibrator 27, an acceleration sensor 28, and an external device (not shown). Part 29 and the like.

  The storage unit 22 stores information code C to be read by the reading device 1 or information for generating the information code C in advance, and information code display processing performed when the information code C is displayed on the screen. An application program for executing is stored in advance so as to be executable by the control unit 21. The storage unit 22 stores information on the display position, size, and the like when the information code C is first displayed on the display screen 24a of the information code C as an initial display range.

  The touch panel 24 is configured as a known touch panel type display device, and overlaps the display screen 24a of the display unit configured as a known display device such as a liquid crystal display and the display unit on the display screen 24a. And a transparent panel that functions as a detection unit capable of detecting a range touched (contacted) (hereinafter also simply referred to as a touch range T). The touch panel 24 is configured such that the display content of the display unit is controlled by the control unit 21 and a signal corresponding to the touch range T on the display screen 24 a is output to the control unit 21.

  The speaker 26 is configured by a known speaker, and is configured to emit (sound) a predetermined sound such as a preset sound or a buzzer sound according to control by the control unit 21. The vibrator 27 is configured by a known vibrator mounted on a mobile terminal, and is configured to generate a predetermined vibration in accordance with control by the control unit 21.

  The acceleration sensor 28 is a known three-axis acceleration sensor (three-axis motion sensor) capable of detecting acceleration in the three-axis direction, and detects acceleration in each of the X-axis direction, the Y-axis direction, and the Z-axis direction. The acceleration signal corresponding to the detection result is output to the control unit 21. The acceleration sensor 28 detects accelerations in the three-axis directions (X-axis direction, Y-axis direction, and Z-axis direction), so that the position of the mobile terminal 10 in the three-axis direction and the direction in which the display screen 24a faces. (Hereinafter also referred to as screen direction F) can be detected (calculated).

Next, information code display processing executed by the control unit 21 of the portable terminal 10 when the reading device 1 reads the information code C in the present embodiment will be described with reference to the flowchart shown in FIG.
When an information code display process is started in the control unit 21 by performing a predetermined operation on the mobile terminal 10 to display the information code C on the display screen 24a, first, as shown in step S101 of FIG. Display processing is performed. In this process, the information code C is displayed in the initial display range So in the display screen 24a based on the information code C stored in the storage unit 22 and information related to the initial display range. The initial display range So can correspond to an example of a “predetermined display range” before the change.

  Next, the touch range detection process shown in step S103 is performed, and the process for detecting the touch range T on the display screen 24a is performed. Subsequently, in the determination process in step S105, it is determined whether or not at least a part of the detected touch range T is in an overlapping state overlapping the initial display range So. The control unit 21 that performs the determination process in step S105 may correspond to an example of a “determination unit”.

  Here, the touch range T is not detected because the finger holding the case 11 is not touching the display screen 24a, or the touch range T detected because the finger holding the case 11 is touching the display screen 24a is not detected. If it does not overlap the initial display range So, it is determined as No in step S105 because it is not an overlapping state. In this case, it is determined No in step S115 until a predetermined end operation or the like is performed, and the state where the information code C is displayed on the display screen 24a is continued.

  On the other hand, as shown in FIG. 4A, when the touch range T detected because the finger holding the case 11 touches the display screen 24a overlaps at least a part of the initial display range So. Is determined to be Yes in step S105 as being in an overlapping state. In this case, the display range calculation process shown in step S107 is performed, and in order to eliminate the overlap with the touch range T detected on the display screen 24a, the display screen 24a has a shape similar to the initial display range So and the touch range described above. The largest range at a position not overlapping with T is calculated as the display range S.

  Then, in the determination process shown in step S109, it is determined whether or not the display range S calculated as described above is less than a predetermined size. In the present embodiment, the predetermined size corresponds to the number of cells of a plurality of types of cells constituting the information code, and is a minimum amount of information that can ensure a cell size that can be read by a normal reader. The size of the code is set so that the initial display range So is also reduced. That is, in the information code displayed in the display range smaller than the predetermined size, since each cell constituting the captured information code is small, there is a high possibility that it is difficult to read with an ordinary reader. Become.

  Here, if the display range S calculated as described above is equal to or greater than the initial display range So, and if it is determined that it is greater than or equal to the predetermined size (No in S109), the display position changing process shown in step S111. Is made. In this case, as shown in FIG. 4B, the information code C is displayed in the same size as the initial display range So with respect to the display range S of the position calculated as described above. The display position of the code C is changed. Thereby, the position where the information code C is displayed in the display screen 24a can be changed to a position that is not hidden by the finger. Thereafter, the information code C is displayed on the display screen 24a at the display position changed as described above until a predetermined end operation or the like is performed (No in S115), and the display position is determined until it is again determined to be in an overlapping state. The display state at is continued. The control unit 21 that performs the process of step S111 may correspond to an example of a “display control unit”.

  Further, as shown in FIG. 5A, since the detected touch range T is larger than the state shown in FIG. 4A, the display range S calculated as described above is less than the initial display range So. Even so, if it is determined that the display range S is equal to or larger than the predetermined size (No in S109), the display position changing process described above is performed (S111). In this case, as shown in FIG. 5B, the information code C is displayed so that the information code C is displayed smaller than the initial display range So with respect to the display range S of the position calculated as described above. The display position of the code C is changed. Even in this way, the position where the information code C is displayed in the display screen 24a can be changed to a position that is not hidden by the finger. Thereafter, until the predetermined end operation is performed (No in S115), the information code C is displayed on the display screen 24a at the display position that has been reduced and changed as described above, and the information code C is displayed until it is determined again as an overlapping state. The display state at the position is continued.

  On the other hand, as shown in FIG. 6A, since the detected touch range T is larger than the state shown in FIG. 5A, the display range S calculated as described above has the predetermined size. If it is determined that it is less than (Yes in S109), the notification process shown in step S113 is performed. In this process, even if the information code C is reduced and displayed with respect to the display range S of the position calculated as described above, a readable cell size is secured as shown in FIG. If the display state is difficult to be displayed, the display state is not changed from the state shown in FIG. 6A, and a notification for prompting the cancellation of the touch state is notified by using the pronunciation by the speaker 26, the vibration by the vibrator 27, or the like. Is done. Thereafter, when a predetermined end operation or the like has not been performed (No in S115), the processing from Step S101 is performed. Note that the speaker 26 and the vibrator 27 correspond to an example of a “notification unit”, and employ sound such as “please release your finger from the screen” as the pronunciation by the speaker 26 for prompting the cancellation of the touch state. Alternatively, as the vibration by the vibrator 27 for prompting the cancellation of the touch state, a notification vibration having a vibration period different from the normal vibration may be employed.

  Then, when the user who has received the notification using the speaker 26 or the vibrator 27 as described above grasps the touch state again to eliminate the above-described overlapping state (No in S105), the readable information Assuming that the code C is in a display state displayed on the display screen 24a, the notification is terminated and the display state is continued.

  As described above, in the mobile terminal 10 according to the present embodiment, the information code C is displayed on the initial display range So of the display screen 24a by the touch panel 24, and at least a part of the touch range T with respect to the detected display screen 24a is detected. If it is determined that the overlapping state overlaps the initial display range So (Yes in S105), the initial display range So is changed to the display range S so as to eliminate the overlap with the touch range T on the display screen 24a (S111). ).

  Thereby, when a part of the information code C is hidden because the finger holding the mobile terminal 10 is unintentionally touching the display screen 24a, the information code C is displayed in the display screen 24a. Can be changed to a position where the finger is not touched. Therefore, reading failure of the information code C displayed on the screen can be suppressed.

  Furthermore, when it is determined that the state is overlapped in the determination process of step S105 (Yes in S105), the display screen 24a is most often located at a position that does not overlap with the touch range T in order to eliminate the overlap with the touch range T on the display screen 24a. The initial display range So is changed to the display range S so as to increase. Thereby, since the information code C can be displayed larger at a position where the finger is not touched in the display screen 24a, it is possible to reliably suppress failure in reading the information code C displayed on the screen.

  In particular, when the size of the changed display range S is less than the predetermined size, a notification that prompts the user to cancel the touch state in which the display screen 24a is touched is a voice of the speaker 26 functioning as a notification unit or a vibration of the vibrator 27. This is done by using vibration or the like. Thereby, the information code C on the display screen 24a can be made difficult to be concealed by the user who has received the notification re-gripping so as to cancel the touch state. On the other hand, if the size of the changed display range S is equal to or larger than the predetermined size, the information code C can be read in the display state after the change, and a notification that prompts the cancellation of the touch state is performed. Since it is not received, unnecessary notifications can be eliminated.

[Second Embodiment]
Next, a portable terminal to which the portable information code display device according to the second embodiment is applied will be described with reference to FIG.
The second embodiment is mainly different from the first embodiment in that when it is determined that the state is the overlap state, a notification for prompting the user to cancel the touch state is performed without changing the display state.

Hereinafter, in the second embodiment, an information code display process executed by the control unit 21 of the portable terminal 10 when the reading device 1 reads the information code C will be described with reference to a flowchart shown in FIG.
As in the first embodiment, the information code C is displayed in the initial display range So of the display screen 24a (S101 in FIG. 7), and the detected touch range T overlaps at least part of the initial display range So. Therefore, if it is determined that there is an overlapping state (Yes in S105), the notification process shown in step S113 is performed. In this process, as in the first embodiment, a notification for prompting the user to cancel the touch state is notified using the sound produced by the speaker 26 or the vibration by the vibrator 27 without changing the display state.

  As described above, the user who has received the notification cancels the touch state without calculating the display range S or changing the display of the information code C according to the calculation when it is determined that the state is the overlap state. Since the information code on the display screen 24a is not hidden because it is gripped again, it is possible to suppress failure in reading the information code C displayed on the screen.

  Note that the characteristic configuration of the present embodiment in which the notification is performed without changing the display state when it is determined that the state is the overlap state can be applied to other embodiments and the like.

[Third Embodiment]
Next, a portable terminal to which the portable information code display device according to the third embodiment is applied will be described.
The third embodiment is mainly different from the first embodiment in that the condition for determining an overlapping state is changed.

  When a QR code or the like having an error correction function is adopted as the information code C displayed on the display screen 24a, even when the touch range T and the initial display range So overlap, the overlap area is sufficiently small Even if the display position of the information code C is not changed, the reading apparatus 1 can be read in the display state by using error correction.

  Therefore, in the information code display process according to the present embodiment, unlike the first embodiment in which at least a part of the detected touch range T overlaps the initial display range So to determine an overlapping state, the touch range T and the initial display are displayed. When the overlapping area with the range So exceeds a predetermined value, the overlapping state is determined.

  Specifically, by setting the predetermined value for each information code C in accordance with the error-correctable range (error correction level) of the information code C to be displayed on the screen, the overlapping area is less than the predetermined value. If the touch range T and the initial display range So overlap each other to the extent that error correction is possible, the overlapping state is not determined in the determination process of step S105.

  As described above, since the displayed information code C has an error correction function, even if the touch range T and the initial display range So partially overlap, if the information code C is in a display state in which error correction is possible, The reader 1 can be read in the display state without being determined to be in an overlapping state. As a result, it is possible to eliminate processing that unnecessarily changes even the position of the readable information code C in the display state.

  In the determination process of step S105, when the information code C displayed in the initial display range So overlaps with a feature pattern that cannot use error correction such as a position detection pattern, the overlapping area is equal to or less than the predetermined value. Even if it is, you may determine with an overlapping state.

  In addition, in the display range calculation process in step S107, the display range S is not calculated so as to eliminate the overlap with the touch range T detected on the display screen 24a, and an error-correctable range is considered. The display range S may be calculated so that the overlap with the detected touch range T is reduced to an extent that allows error correction.

  Note that the characteristic configuration of the present embodiment, in which the overlapping area between the touch range T and the initial display range So exceeds the predetermined value, and is determined to be in the overlapping state, can be applied to other embodiments and the like.

[Fourth Embodiment]
Next, a portable terminal to which the portable information code display device according to the fourth embodiment is applied will be described with reference to FIGS.
In the fourth embodiment, the display position of the information code C is not changed when it is not estimated that the display screen 24a is directed to the reading device 1 by detecting the screen direction F to which the display screen 24a is directed. However, this is mainly different from the first embodiment.

Hereinafter, in the fourth embodiment, information code display processing executed by the control unit 21 of the mobile terminal 10 when the reading device 1 reads the information code C will be described with reference to the flowchart shown in FIG.
Similar to the first embodiment, when the information code C is displayed in the initial display range So of the display screen 24a (S101 in FIG. 8), the touch range T is detected (S103). Subsequently, in the determination process shown in step S104, it is determined whether or not the screen direction F detected using the acceleration sensor 28 is within a predetermined angle range. The acceleration sensor 28 may correspond to an example of a “screen direction detection unit”.

  Here, the predetermined angle range is set according to an angle range in which it is estimated that the display screen 24 a is directed to the reading port 2 of the reading device 1. More specifically, as shown in FIG. 9, the predetermined angle range is an inclination angle θa obtained by inclining the mobile terminal 10 in a horizontal state so that the user side is on the lower side (for example, 30 with respect to the horizontal direction). The screen direction Fa at (°) and the screen direction Fb at an inclination angle θb (for example, −30 ° with respect to the horizontal direction) inclined so that the user side is on the upper side are set as the lower limit and the upper limit. .

  If the screen direction F detected using the acceleration sensor 28 is Fa or more and Fb or less, it is determined that the screen direction F is within a predetermined angle range (Yes in S104), and the display screen 24a is displayed on the reading device 1. It is estimated that it is directed to the reading port 2, and the processing from step S105 onward is performed. On the other hand, if the screen direction F detected using the acceleration sensor 28 is not less than Fa and not more than Fb, the screen direction F is not within the predetermined angle range (No in S104), and the display screen 24a is read by the reading device 1. It is presumed that it is not directed to the mouth 2, and the processing after step S115 is performed without changing the display position of the information code C.

  As described above, the touch range T is detected when the screen direction F to which the detected display screen 24a faces is within a predetermined angle range. For example, the display screen 24a is directed toward the user. In the detection state, the screen direction F is outside the predetermined angle range, the touch range T is not detected, and the initial display range So is not changed. That is, in the case where it is estimated that the display screen 24a is not directed to the reading device 1, it is not necessary to change the position of the information code C in the first place, and unnecessary processing in such a state is eliminated. be able to. In particular, during a touch operation on the display screen 24a, the display position of the information code C can be prevented from being changed unintentionally even though the display screen 24a is not touched by the reading port 2, and the operation is difficult. Can be prevented.

  Note that the characteristic configuration of the present embodiment in which the display position of the information code C is not changed when it is not estimated from the detected screen direction F that the display screen 24a is directed toward the reading device 1 is different from the other embodiments. It can also be applied to.

In addition, this invention is not limited to said each embodiment and modification, For example, you may actualize as follows.
(1) The information code C displayed on the display screen of the touch panel 24 is not limited to a QR code, but for example, other types such as a one-dimensional code such as a barcode, a two-dimensional code such as a data matrix code, and a maxi code. It may be an information code.

(2) The present invention is not limited to being applied to a mobile phone (smart phone) having a touch panel, and may be a portable information code display device having a touch panel such as a dedicated mobile terminal that displays an information code on the touch panel. Can be applied.

10 ... Portable terminal (portable information code display device)
21 ... Control unit (determination unit, display control unit)
24 ... Touch panel (display unit, detection unit)
24a ... Display screen 26 ... Speaker (notification unit)
27. Vibrator (notification part)
28 ... Accelerometer (screen direction detector)
C ... Information code F ... Screen direction S ... Display range So ... Initial display range

Claims (6)

A display unit for displaying the information code in a predetermined display range of the display screen;
A detection unit for detecting a touch range touched on the display screen;
A determination unit that determines whether or not at least a part of the touch range detected by the detection unit overlaps the predetermined display range;
A display control unit that changes the predetermined display range so as to reduce an overlap area with the touch range on the display screen when the determination unit determines that the overlap state;
A portable information code display device comprising:   When the determination unit determines that the overlap state is present, the display control unit is maximized at a position that does not overlap the touch range on the display screen in order to eliminate the overlap with the touch range on the display screen. The portable information code display device according to claim 1, wherein the predetermined display range is changed.   And a notification unit configured to notify the user of the touch state where the display screen is touched when the size of the predetermined display range changed by the display control unit is less than a predetermined size. The portable information code display device according to claim 2. A display unit for displaying the information code in a predetermined display range of the display screen;
A detection unit for detecting a touch range touched on the display screen;
A determination unit that determines whether or not at least a part of the touch range detected by the detection unit overlaps the predetermined display range;
When the determination unit determines that the overlap state, the notification unit that performs notification for prompting the cancellation of the touch state in which the display screen is touched,
A portable information code display device comprising:   5. The mobile phone according to claim 1, wherein the determination unit determines the overlap state when an overlapping area between the touch range and the predetermined display range exceeds a predetermined value. Type information code display device. A screen direction detection unit that detects a direction in which the display screen is facing;
The said detection part performs display control according to the said touch range, when the direction which the said display screen faces detected by the said screen direction detection part is in a predetermined angle range. The portable information code display device according to any one of 1 to 5.

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