JP2018037111A - List type display device, display control method for list type display device, and program therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a touch operation for enlarging/reducing a screen with one finger, intuitively and simply.SOLUTION: A display device 1 includes a movement locus detecting unit 51, an operation determination unit 52, and a display control unit 53. The movement locus detection unit 51 detects a touch operation on a display screen. The operation determination unit 52 determines whether or not the touch operation that has been detected with the movement locus detection unit 51 contains an edge trace operation which is an operation in which a touch position moves in a predetermined region of the display screen. The display control unit 53, in a case where the operation determination unit 52 determines that the edge trace operation in which a touch position moves in the predetermined region is contained, controls for enlarging display or reducing display of the display screen according to a direction of movement in the predetermined region.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device that performs enlargement / reduction display by a touch operation, a display control method, and a program.

Conventionally, in display devices such as smartphones, operations such as screen scrolling and character input have been performed by touch operations on the screen.
In recent years, attention has been paid to a list-type display device that is used by being worn on an arm, and a function similar to a smartphone is mounted on a list-type display device.
Such a list-type display device is described in Patent Document 1, for example.

JP 2013-61176 A

However, a list-type information processing terminal has a limitation in performing a touch operation because its display surface is smaller than that of another display device such as a smartphone.
In particular, when enlarging / reducing the display screen, it is difficult to perform operations using two fingers, such as pinch-out and pinch-in, like a smartphone.
As described above, in the conventional technique, it is difficult to perform a touch operation for enlarging / reducing the screen in a manner that is easy to understand intuitively with one finger.

  The present invention has been made in view of such a situation, and an object of the present invention is to perform a touch operation for enlarging / reducing a screen in a manner that is easy to understand intuitively with one finger.

  In order to achieve the above object, a display device according to one embodiment of the present invention includes an operation detection unit that detects a touch operation on a display screen, and the touch operation detected by the operation detection unit has a touch position of the display screen. Determining means for determining whether or not an operation for moving a peripheral area along the side of the display screen is included; and an operation for moving the touch position in the peripheral area by the determining means Display control means for controlling the display screen to be enlarged or reduced according to the direction of movement of the peripheral area when it is determined to be included in the operation, and the touch position is the peripheral edge When the start position of the movement locus of the touch operation including the operation of moving the part is an area outside the peripheral edge and the end position of the movement locus is an area inside the peripheral edge, the display control is performed. Means about said start position or said end position of the touch operation on the display screen, the display screen enlarge or shrink the display, characterized in that.

  According to the present invention, it is possible to perform a touch operation for enlarging / reducing a screen in a manner that is easy to understand intuitively with one finger.

It is a block diagram which shows the structure of the hardware of the display apparatus which concerns on one Embodiment of this invention. It is a functional block diagram which shows the functional structure for performing a touch operation control process among the functional structures of a display apparatus. It is a schematic diagram which shows the concept of the enlarged display or reduced display of the display screen according to edge trace operation. It is a flowchart explaining the flow of the touch operation control process which the display apparatus of FIG. 1 which has the functional structure of FIG. 2 performs. It is a schematic diagram which shows the concept of the reduced display of the display screen according to edge trace operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Constitution]
FIG. 1 is a block diagram showing a hardware configuration of a display device 1 according to an embodiment of the present invention.
The display device 1 is configured as a list type terminal, for example.

  The display device 1 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a bus 14, an input / output interface 15, an imaging unit 16, and an input unit 17. An output unit 18, a storage unit 19, a communication unit 20, and a drive 21.

  The CPU 11 executes various processes according to a program recorded in the ROM 12 or a program loaded from the storage unit 19 to the RAM 13. For example, the CPU 11 executes touch operation control processing according to a touch operation control processing program described later.

  The RAM 13 appropriately stores data necessary for the CPU 11 to execute various processes.

  The CPU 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output interface 15 is also connected to the bus 14. An imaging unit 16, an input unit 17, an output unit 18, a storage unit 19, a communication unit 20, and a drive 21 are connected to the input / output interface 15.

  Although not shown, the imaging unit 16 includes an optical lens unit and an image sensor.

The optical lens unit is configured by a lens that collects light, for example, a focus lens or a zoom lens, in order to photograph a subject.
The focus lens is a lens that forms a subject image on the light receiving surface of the image sensor. The zoom lens is a lens that freely changes the focal length within a certain range.
The optical lens unit is also provided with a peripheral circuit for adjusting setting parameters such as focus, exposure, and white balance as necessary.

The image sensor includes a photoelectric conversion element, AFE (Analog Front End), and the like.
The photoelectric conversion element is composed of, for example, a CMOS (Complementary Metal Oxide Semiconductor) type photoelectric conversion element or the like. A subject image is incident on the photoelectric conversion element from the optical lens unit. Therefore, the photoelectric conversion element photoelectrically converts (captures) the subject image, accumulates the image signal for a predetermined time, and sequentially supplies the accumulated image signal as an analog signal to the AFE.
The AFE performs various signal processing such as A / D (Analog / Digital) conversion processing on the analog image signal. Through various signal processing, a digital signal is generated and output as an output signal of the imaging unit 16.
The data indicated by the output signal of the imaging unit 16 is hereinafter referred to as “captured image data”. Data of the captured image is appropriately supplied to the CPU 11 or an image processing unit (not shown).

The input unit 17 includes various buttons and the like, and inputs various types of information according to user instruction operations.
The output unit 18 includes a display, a speaker, and the like, and outputs images and sounds. In the present embodiment, a touch panel as the input unit 17 is superimposed on a display as the output unit 18, and input by a touch operation on the display screen is possible.
The storage unit 19 is configured by a DRAM (Dynamic Random Access Memory) or the like, and stores various image data.
The communication unit 20 controls communication performed with other devices (not shown) via a network including the Internet.

  A removable medium 31 composed of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately attached to the drive 21. The program read from the removable medium 31 by the drive 21 is installed in the storage unit 19 as necessary. The removable medium 31 can also store various data such as image data stored in the storage unit 19 in the same manner as the storage unit 19.

FIG. 2 is a functional block diagram illustrating a functional configuration for executing the touch operation control process among the functional configurations of the display device 1.
The touch operation control process is a touch operation on the touch panel that detects an operation in which a contact position follows a predetermined area of the display screen, for example, a peripheral portion (a range from the outermost periphery to the inside by a set number of pixels). A series of processes for performing enlarged display or reduced display of the display screen according to the above. Note that the display device 1 in the present embodiment performs an enlarged display or a reduced display of a display screen by a touch operation control process in addition to controlling the display according to a general touch operation such as a flick or a tap. Further, it is only necessary to detect an operation that traces a predetermined area of the display screen, not limited to the peripheral portion, and to perform an enlarged display or a reduced display of the display screen according to this operation.

  When the touch operation control process is performed, as illustrated in FIG. 2, the movement trajectory detection unit 51, the operation determination unit 52, and the display control unit 53 function in the CPU 11.

  The movement trajectory detection unit 51 determines whether or not the touch operation has been performed. When it is determined that the touch operation has been performed, the touch operation has been terminated from the place (start position) where the touch operation was started on the display screen. The movement locus of the contact position to the place (end position) is detected. For example, the movement locus detection unit 51 sequentially detects addresses on the display screen from the place where the touch operation is started to the place where the touch operation is finished.

  The operation determination unit 52 determines whether or not an operation (hereinafter referred to as “edge trace operation”) for tracing the peripheral portion of the display screen is performed based on the movement locus of the touch operation detected by the movement locus detection unit 51. Make a decision. When the operation determination unit 52 determines that the edge trace operation has been performed, the operation determination unit 52 detects the movement direction (left to right or top to bottom) and the movement distance in the edge trace operation.

In the present embodiment, the relationship between the moving direction in the edge trace operation and the enlargement or reduction of the display screen is preset. Specifically, in the area along the left and right sides of the display screen, movement from top to bottom corresponds to reduction of the display screen, and movement from bottom to top corresponds to expansion of the display screen. Yes. In the region along the upper and lower sides in the peripheral edge of the display screen, the movement from left to right corresponds to the enlargement of the display screen, and the movement from right to left corresponds to the reduction of the display screen.
Furthermore, in the present embodiment, the movement distance in the edge trace operation is associated with the enlargement ratio or reduction ratio of the display screen in advance. That is, the enlargement ratio or the reduction ratio is set so that the degree of enlargement or reduction increases as the moving distance in the edge trace operation increases.

  When the edge trace operation is included in the process of the touch operation, the display control unit 53 enlarges the display screen according to the movement direction and the movement distance of the edge trace operation around the start position or the end position of the touch operation. Zoom out. When the direction for moving the contact position along the side of the display screen is reversed as the edge trace operation, the display control unit 53 performs enlarged display and reduced display on the display screen in accordance with the movement direction. Switch.

FIG. 3 is a schematic diagram showing the concept of enlarged display or reduced display on the display screen according to the edge trace operation.
In FIG. 3A, the contact position moves from the start position of the display screen toward the bottom of the display screen, and after reaching the lower side of the display screen, the contact position moves toward the right. Touch operation has been completed.
In this case, since the edge trace operation corresponding to the enlarged display is included in the process of the touch operation, the display control unit 53 has an enlargement rate according to the moving distance of the edge trace operation as shown in FIG. The display screen is enlarged and centered on the start position of the touch operation. In this case, when the contact position is moving downward, it is the same as the normal drag operation, so the display screen once scrolls down and reaches the lower side of the display screen. When the operation shifts to the edge trace operation, the display changes to an enlarged display centered on the start position.

On the other hand, in FIG. 3C, after the contact position moves from the start position along the lower side of the display screen toward the left, the contact position moves toward the display screen and touches at the end position. The operation has ended.
In this case, since the edge trace operation corresponding to the reduced display is included in the process of the touch operation, the display control unit 53 has a reduction rate according to the moving distance of the edge trace operation as shown in FIG. A reduction display of the display screen centering on the end position of the touch operation is performed.

[Operation]
Next, the operation will be described.
4 is a flowchart for explaining the flow of touch operation control processing executed by the display device 1 of FIG. 1 having the functional configuration of FIG.
The touch operation control process is started when the display device 1 is turned on, and is repeatedly executed until the power is turned off.

When the touch operation control process is started, in step S1, the movement locus detection unit 51 determines whether or not a touch operation on the display screen has been performed.
If a touch operation is performed on the display screen, YES is determined in step S1, and the process proceeds to step S2.
On the other hand, when the touch operation on the display screen is not performed, it is determined as NO in Step S1, and the process of Step S1 is repeated.

In step S2, the movement trajectory detection unit 51 detects the movement trajectory of the contact position from the start position to the end position of the touch operation on the display screen.
In step S <b> 3, the operation determination unit 52 determines whether or not an edge trace operation has been performed based on the movement trajectory of the touch operation detected by the movement trajectory detection unit 51.
When the edge trace operation is not performed, it is determined as NO in Step S3, and the touch operation control process is repeated.
On the other hand, when the edge trace operation is performed, YES is determined in step S3, and the process proceeds to step S4.

In step S4, the operation determination unit 52 detects the movement direction and the movement distance in the edge trace operation.
In step S5, the display control unit 53 performs enlargement or reduction display of the display screen according to the moving direction and moving distance of the edge trace operation with the touch operation start position or end position as the center.
Specifically, when the edge trace operation as illustrated in FIG. 3A is performed, the display control unit 53 performs an enlarged display of the display screen around the start position, and the edge as illustrated in FIG. When the trace operation is performed, the display screen is reduced and displayed around the end position.
After step S5, the touch operation control process is repeated.

The display device 1 configured as described above includes a movement locus detection unit 51, an operation determination unit 52, and a display control unit 53.
The movement locus detection unit 51 detects a touch operation on the display screen.
The operation determination unit 52 determines whether or not the touch operation detected by the movement trajectory detection unit 51 includes an edge trace operation in which the touch position moves in a predetermined area (for example, a peripheral portion) of the display screen.
When the operation determination unit 52 determines that the touch position includes an edge trace operation that is an operation of moving a predetermined area, the display control unit 53 displays a display screen according to the direction of moving the predetermined area. Control to enlarge or reduce the display.
Thereby, in the display device 1, when performing a touch operation on the display screen, the display screen is enlarged or reduced according to the direction by performing an edge trace operation for moving the peripheral portion of the display screen. . At this time, the display screen is enlarged or reduced at an enlargement rate or reduction rate corresponding to the distance of the edge trace operation.
Accordingly, it is possible to perform a touch operation for enlarging / reducing the screen in a manner that is intuitively easy to understand with one finger.

In addition, the display control unit 53 displays the display screen in an enlarged or reduced manner around at least one of the start position and the end position of the touch operation on the display screen.
Thus, the user can intuitively specify the center position to be enlarged or reduced on the display screen intuitively.

When the direction is reversed in the process of moving the peripheral part of the display screen in the edge trace operation, the display control unit 53 controls to switch between the enlarged display and the reduced display on the display screen in accordance with the movement direction. I do.
As a result, the user can flexibly switch between enlargement / reduction of the display screen during the edge trace operation and check the display screen, which is convenient for touch operations for enlargement / reduction of the display screen. The sex can be increased.

Further, when it is determined that the touch position includes an operation of moving the predetermined area, the display control unit 53 performs an enlargement display or a reduction display of the display screen according to the distance to move the predetermined area. , Control the enlargement or reduction rate.
Thereby, when the user performs a touch operation, the degree of enlargement / reduction of the display screen is intuitively easily understood.

[Application Example 1]
In the above embodiment, when the display screen is reduced by edge trace operation, as shown in FIG. 3C, the touch operation end position is the center, as shown in FIG. You can also
FIG. 5 is a schematic diagram showing the concept of reduced display on the display screen according to the edge trace operation.
In FIG. 5A, the contact position moves from the start position of the display screen toward the lower side of the display screen, and after reaching the lower side of the display screen, the contact position moves to the right slightly. After that, the moving direction is reversed, the contact position moves largely to the left, and the touch operation is ended at the end position.

In this case, as shown in FIG. 5B, when the contact position is moving downward, the display screen is temporarily scrolled down because it is the same as a normal drag operation. However, if the contact position moves to the right along the side after reaching the lower side of the display screen, the display changes to an enlarged display centered on the start position. It is also possible to move the contact position to the left immediately after reaching the lower side of the display screen without passing the contact position to the right.
Then, as shown in FIG. 5C, when the movement of the contact position is reversed and moved to the left along the side, the display changes to a reduced display centered on the start position.
As a result, as shown in FIG. 5D, a reduced display of the display screen centering on the start position of the touch operation is performed.

In the case of such an operation mode, similarly to the enlarged display shown in FIGS. 3A and 3B, the display screen can be reduced and displayed around the start position of the touch operation. A unified operation mode can be provided in both reduced display.
3C and 3D, when the reduced display operation is performed in the same manner as the enlarged display shown in FIGS. 3A and 3B, and when the display screen is enlarged. Similarly to the reduced display shown in FIG. 5, the end position of the touch operation can be set as the center of the enlarged display.
In this case, for example, after moving the contact position toward the right from the start position along the lower side of the display screen, the contact position is moved toward the display screen, and the touch operation is terminated at the end position.
Then, since the edge trace operation corresponding to the enlarged display is included in the process of the touch operation, the display control unit 53 displays the display screen centering on the end position of the touch operation at an enlargement rate according to the movement distance of the edge trace operation Reduced display of.

  Even in such an operation mode, the display screen can be enlarged and displayed at the end position of the touch operation as in the reduced display shown in FIGS. 3C and 3D. A unified operation mode can be provided for both display and reduced display.

  In addition, this invention is not limited to the above-mentioned embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.

In the above-described embodiment, in the region along the left and right sides in the peripheral portion of the display screen, the movement from top to bottom corresponds to the reduction of the display screen, and the movement from bottom to top corresponds to the enlargement of the display screen. Although described as a thing, it is not restricted to this. That is, in the area along the left and right sides in the peripheral portion of the display screen, the movement from the bottom to the top may correspond to the reduction of the display screen, and the movement from the top to the bottom may correspond to the enlargement of the display screen. .
Similarly, in the above-described embodiment, in the region along the upper and lower sides in the peripheral portion of the display screen, movement from left to right corresponds to enlargement of the display screen, and movement from right to left reduces the display screen. However, the present invention is not limited to this. That is, in the area along the upper and lower sides in the peripheral portion of the display screen, movement from right to left may correspond to enlargement of the display screen, and movement from left to right may correspond to reduction of the display screen. .
Furthermore, on the periphery of the display screen, the relationship between the direction of movement on the left and right sides and enlargement / reduction is set opposite to each other, and the relationship between the direction of movement on the upper and lower sides and enlargement / reduction is set opposite to each other You can do it. For example, when the display screen is moved in the counterclockwise direction at the peripheral edge of the display screen, the display screen can be enlarged. When the display screen is moved in the clockwise direction, the display screen can be reduced.

Further, in the above-described embodiment, the display device 1 to which the present invention is applied has been described using a wrist terminal as an example, but is not particularly limited thereto.
For example, the present invention can be applied to general electronic devices having an input function by a touch operation. Specifically, for example, the present invention is applicable to notebook personal computers, tablet terminals, printers, television receivers, video cameras, portable navigation devices, mobile phones, smartphones, portable game machines, and the like. .

The series of processes described above can be executed by hardware or can be executed by software.
In other words, the functional configuration of FIG. 2 is merely an example and is not particularly limited. That is, it is sufficient if the display device 1 has a function capable of executing the above-described series of processing as a whole, and what kind of functional block is used to realize this function is not particularly limited to the example of FIG.
In addition, one functional block may be constituted by hardware alone, software alone, or a combination thereof.

When a series of processing is executed by software, a program constituting the software is installed on a computer or the like from a network or a recording medium.
The computer may be a computer incorporated in dedicated hardware. The computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose personal computer.

  The recording medium including such a program is not only constituted by the removable medium 31 of FIG. 1 distributed separately from the apparatus main body in order to provide the program to the user, but also in a state of being incorporated in the apparatus main body in advance. The recording medium etc. provided in The removable medium 31 is composed of, for example, a magnetic disk (including a floppy disk), an optical disk, a magneto-optical disk, or the like. The optical disc is composed of, for example, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versatile Disc), a Blu-ray Disc (Blu-ray Disc) (registered trademark), and the like. The magneto-optical disk is configured by an MD (Mini-Disk) or the like. In addition, the recording medium provided to the user in a state of being preliminarily incorporated in the apparatus main body includes, for example, the ROM 12 in FIG. 1 in which a program is recorded, the hard disk included in the storage unit 19 in FIG.

  In the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in chronological order according to the order, but is not necessarily performed in chronological order, either in parallel or individually. The process to be executed is also included.

  As mentioned above, although several embodiment of this invention was described, these embodiment is only an illustration and does not limit the technical scope of this invention. The present invention can take other various embodiments, and various modifications such as omission and replacement can be made without departing from the gist of the present invention. These embodiments and modifications thereof are included in the scope and gist of the invention described in this specification and the like, and are included in the invention described in the claims and the equivalents thereof.

The invention described in the scope of claims at the beginning of the filing of the present application will be appended.
[Appendix 1]
Operation detecting means for detecting a touch operation on the display screen;
Determination means for determining whether or not the touch operation detected by the operation detection means includes an operation in which a touch position moves in a predetermined region of the display screen;
When the determination means determines that the touch position includes an operation to move the predetermined area, the display screen is enlarged or reduced according to a direction of moving the predetermined area. Display control means to perform,
A display device comprising:
[Appendix 2]
The display device according to appendix 1, wherein the display control unit displays the display screen in an enlarged or reduced manner around at least one of a start position and an end position of the touch operation on the display screen.
[Appendix 3]
In the predetermined operation, when the direction is reversed in the process of moving the predetermined area of the display screen in the predetermined operation, the display control unit enlarges and reduces the display screen according to the direction of the movement. The display device according to appendix 1 or 2, characterized by performing control to switch between.
[Appendix 4]
When the display control unit determines that the touch position includes an operation of moving the predetermined area, the display control unit enlarges or reduces the display screen according to the distance of moving the predetermined area. The display device according to any one of appendices 1 to 3, wherein an enlargement ratio or a reduction ratio is controlled.
[Appendix 5]
The display device according to any one of supplementary notes 1 to 4, wherein the predetermined region is a peripheral portion of a display screen.
[Appendix 6]
An operation detection step for detecting a touch operation on the display screen;
A determination step of determining whether or not the touch operation detected in the operation detection step includes a predetermined operation in which a touch position moves in a predetermined region of the display screen;
When it is determined by the determination step that the touch operation includes an operation for moving the predetermined area, the display screen is enlarged or reduced according to a direction in which the predetermined area is moved. Display control steps to be performed;
A display control method comprising:
[Appendix 7]
On the computer,
An operation detection function for detecting a touch operation on the display screen;
A determination function for determining whether or not the touch operation detected by the operation detection function includes a predetermined operation in which a touch position moves in a predetermined region of the display screen;
When the determination function determines that the touch operation includes an operation for moving the predetermined area, the display screen is enlarged or reduced according to a direction in which the predetermined area is moved. Display control function to perform,
A program characterized by realizing.

  DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 11 ... CPU, 12 ... ROM, 13 ... RAM, 14 ... Bus, 15 ... Input / output interface, 16 ... Imaging part, 17 ... Input unit, 18 ... output unit, 19 ... storage unit, 20 ... communication unit, 21 ... drive, 31 ... removable media, 51 ... moving track detection unit, 52 ... Operation determination unit, 53... Display control unit

The present invention relates to a list-type display device that performs enlargement / reduction display by a touch operation, a display control method for the list-type display device, and a program thereof .

To achieve the above object, one aspect list display device of the present invention includes an operation detecting means for detecting the operation against the display screen, the area of the side of the front Symbol display screen of the display screen sides A determination unit that determines whether or not a side operation that moves along the line is performed, and an operation on the display screen is detected by the operation detection unit, and it is determined that the side operation is performed by the determination unit If, in accordance with the direction of movement of the region of the side, and a display control means for performing control to enlarge or shrink the display screen, before Symbol display control means, operation that put on the display screen around the position, the display screen enlarge or shrink the display, characterized in that.

Claims (5)

Operation detecting means for detecting a touch operation on the display screen;
A determination unit that determines whether or not the touch operation detected by the operation detection unit includes an operation in which a touch position moves along an edge of the display screen along a side of the display screen;
When the determination means determines that the touch operation includes an operation of moving the touch position in the peripheral area, the display screen is enlarged according to the direction of moving the peripheral area. Or display control means for performing control to reduce the display,
When the start position of the movement locus of the touch operation including the operation of moving the peripheral edge of the touch position is an area outside the peripheral edge, and the end position of the moving locus is an area within the peripheral edge, the display The control means displays the display screen in an enlarged or reduced manner around the start position or the end position of the touch operation on the display screen.
A display device characterized by that.   In the touch operation, when the direction is reversed in the process of moving the peripheral area of the display screen in the touch operation, the display control means The display device according to claim 1, wherein control for switching reduced display is performed.   When it is determined that the touch position includes an operation of moving the peripheral area, the display control unit enlarges or reduces the display screen according to a distance of moving the peripheral area. The display device according to claim 1, wherein an enlargement ratio or a reduction ratio is controlled when displaying. An operation detection step for detecting a touch operation on the display screen;
A determination step of determining whether or not the touch operation detected in the operation detection step includes an operation in which a touch position moves along a side of the display screen along a peripheral area of the display screen;
When it is determined in the determination step that the touch position includes an operation for moving the peripheral area, the display screen is enlarged according to a direction in which the peripheral area is moved. Or a display control step for performing control to reduce the display;
Including
When the start position of the movement locus of the touch operation including the operation of moving the peripheral edge of the touch position is an area outside the peripheral edge, and the end position of the moving locus is an area within the peripheral edge, the display In the control step, the display screen is displayed in an enlarged or reduced manner with the start position or the end position of the touch operation on the display screen as a center. On the computer,
An operation detection function for detecting a touch operation on the display screen;
A determination function for determining whether or not the touch operation detected by the operation detection function includes an operation in which a touch position moves along a side of the display screen along an edge area of the display screen;
When it is determined by the determination function that the touch position includes an operation for moving the peripheral area, the display screen is enlarged according to the direction of moving the peripheral area. Or a display control function for controlling to reduce the display,
Realized,
When the start position of the movement locus of the touch operation including the operation of moving the peripheral edge of the touch position is an area outside the peripheral edge, and the end position of the moving locus is an area within the peripheral edge, the display A program for realizing, as a control function, control for enlarging or reducing the display screen with the start position or the end position of the touch operation on the display screen as a center.

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