Display device, display method, and program

Abstract

To provide a display device with excellent operability that permits a user to previously recognize the scale of displayable trend graph.SOLUTION: A display device (1) includes: a table creation part (12) that creates the combination of a time axis and a display cycle of a trend graph in a table format; a display part (50) that displays a table created by the table creation part (12); an instruction determination part (11) that determines, from the table displayed by the display part (50), the combination of the time axis and the display cycle selected by a user; and a graph creation part (13) that creates a trend graph based on the combination of the time axis and the display cycle selected by the user and causes the display part (50) to display the created trend graph.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a display device, a display method, and a program.

Background Art

[0002] Conventionally, monitoring and control devices have been used in a wide range of fields such as power generation plants, chemical plants, power transmission and distribution facilities, and water and sewage systems. In a monitoring and control device, monitoring data is acquired using the World Wide Web (WWW) or the like that is standardly used on the Internet, and a trend graph indicating the trend and tendency of the acquired monitoring data is displayed on a display screen. As a related technology, there is an invention disclosed in Patent Document 1 below.

[0003] Patent Document 1 discloses that when there is a pinch-in operation or a pinch-out operation during the display of a trend graph, options for a display period and a display cycle are displayed in a time axis scale change menu. Then, the user can select a scale of a desired display period and display cycle from the time axis scale change menu.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above-mentioned Patent Document 1, when it is impossible to display a trend graph with a combination of a display period and a display cycle changed by the user, the scale of the trend graph cannot be changed and displayed.

[0006] One aspect of the present invention aims to provide a display device, display method, and program that allow the user to know in advance the scale of the trend graph that can be displayed, and that offer excellent operability. [Means for solving the problem]

[0007] To solve the above problems, a display device according to one aspect of the present invention comprises: a table creation unit that creates a table of combinations of time axis and display period of a trend graph; a display unit that displays the table created by the table creation unit; a determination unit that determines a combination of time axis and display period selected by the user from the table displayed by the display unit; and a graph creation unit that creates a trend graph using the combination of time axis and display period selected by the user and displays the created trend graph on the display unit.

[0008] To solve the above problems, a display method according to one aspect of the present invention involves creating a table of combinations of time axis and display period for a trend graph, displaying the created table, determining the combination of time axis and display period selected by the user from the displayed table, creating a trend graph using the combination of time axis and display period selected by the user, and displaying the created trend graph.

[0009] Furthermore, in order to solve the above problems, a program according to one aspect of the present invention causes a computer to perform the following processes: creating a table of combinations of time axis and display period for a trend graph; displaying the created table; determining a combination of time axis and display period selected by the user from the displayed table; creating a trend graph using the combination of time axis and display period selected by the user; and displaying the created trend graph. [Effects of the Invention]

[0010] According to one aspect of the present invention, users can have prior knowledge of the scale of the trend graphs that can be displayed, thereby improving operability. [Brief explanation of the drawing]

[0011] [Figure 1] This is a block diagram showing an example configuration of a display device according to an embodiment of the present invention. [Figure 2] Figure 1 is a block diagram showing the details of the control unit. [Figure 3] This figure shows an example of how combinations of time axis and display period in a trend graph can be displayed in a table format. [Figure 4] This is a flowchart illustrating the processing procedure of a display device according to an embodiment of the present invention. [Modes for carrying out the invention]

[0012] [Embodiment] <Example configuration of display device 1> Figure 1 is a block diagram showing an example configuration of a display device 1 according to an embodiment of the present invention. As shown in Figure 1, the display device 1 comprises a control unit 10, a storage unit 20, a communication unit 30, an input unit 40, and a display unit 50. The control unit 10 has the function of controlling the display device 1 as a whole, but the details will be described later.

[0013] The memory unit 20 is a storage device that stores various data used by the display device 1. The memory unit 20 can be a single SRAM (Static Random Access Memory), DRAM (Dynamic Random Access Memory), SDRAM (Synchronous DRAM), HDD (Hard Disk Drive), SSD (Solid-State Drive), SD (Secure Digital) card, eMMC (embedded Multi-Media Controller), or a combination thereof. It is assumed that the memory unit 20 already contains monitoring data acquired for creating trend graphs.

[0014] The communication unit 30 is the part that communicates with other devices, and can use, for example, a wireless LAN (Local Area Network), a wired LAN, a WAN (Wide Area Network), a public telephone network, a mobile data communication network, or a combination of these networks.

[0015] The input unit 40 is a part that receives various types of data input to the display device 1, and can use, for example, a keyboard, a pointing device such as a mouse, a touch panel, or a combination thereof.

[0016] The display unit 50 is the part of the display device 1 that outputs various data, and can be a display device such as a liquid crystal panel. The following description will focus on the case where the input unit 40 is a mouse and the display unit 50 is a display device. Therefore, the input unit 40 may be referred to as the mouse 40 and the display unit 50 as the display device 50.

[0017] Figure 2 is a diagram illustrating the details of the control unit 10 of the display device 1 shown in Figure 1. As shown in Figure 2, the control unit 10 includes an instruction determination unit 11, a table creation unit 12, and a graph creation unit 13.

[0018] The instruction determination unit 11 determines the instruction from the user that is input via the input unit 40. For example, if the display device 50 is displaying a trend graph and the user performs a predetermined action using the input unit 40, the instruction determination unit 11 determines that the user has given an instruction to open a table window. A predetermined action is, for example, when a table window button is displayed on the display device 50 and the user clicks the table window button using the mouse 40.

[0019] In addition, when the user clicks on a jump button within the front window using the mouse 40 while the display device 50 is displaying the front window, the instruction determination unit 11 determines that the combination of the time axis and the display period of the trend graph corresponding to the clicked jump button has been selected by the user.

[0020] FIG. 3 is a diagram showing an example of a case where the combination of the time axis and the display period of the trend graph is displayed in tabular form. The table shown in FIG. 3 will be referred to as the front window. As shown in FIG. 3, the time axis (display period) is displayed on the vertical axis of the front window, and the display period is displayed on the horizontal axis of the front window. The time axis indicates the period for displaying the trend graph, and the display period indicates the period of points when displaying the trend graph.

[0021] Also, as shown in FIG. 3, at the position where each value of the time axis intersects with each value of the display period, a jump button 141 or a region (gray region) 142 indicating that the display of the trend graph is impossible is displayed. In FIG. 3, the region where a circle is displayed is the jump button 141. Also, the other gray region 142 indicates the combination of the time axis and the display period of the trend graph that cannot be displayed.

[0022] Also, in FIG. 3, an arrow indicates the mouse cursor. When clicked at the position where the mouse cursor is located, the instruction determination unit 11 determines that the combination of the time axis and the display period corresponding to the jump button 141 has been selected by the user. Also, as shown in FIG. 3, the time axis and the display period corresponding to the jump button 141 where the mouse cursor is located are displayed in a distinguishable manner, indicating that the time axis is "60 minutes" and the display period is "5 seconds".

[0023] Furthermore, in Figure 3, a black circle is displayed on the jump button 141 corresponding to the time axis and display period of the currently displayed trend graph, making it easy to identify the time axis and display period of the currently displayed trend graph. The user can refer to the jump button 141 with the black circle to find the next scale (combination of time axis and display period) to select. In Figure 3, the time axis of the currently displayed trend graph is "24 hours" and the display period is "60 minutes".

[0024] Returning to the explanation of Figure 2, the table creation unit 12 creates a table of combinations of the time axis and display period of the trend graph, as shown in Figure 3. The table creation unit 12 also determines whether a combination of time axis and display period of a trend graph cannot be displayed based on whether the value obtained by dividing the time axis by the display period is smaller than a first predetermined value or larger than a second predetermined value.

[0025] The table creation unit 12 determines that if the value obtained by dividing the time axis by the display period is smaller than a first predetermined value, the number of display points in the trend graph is too small, and that the combination is an unusable combination of time axis and display period for a trend graph.

[0026] Furthermore, if the value obtained by dividing the time axis by the display period is greater than a second predetermined value, the table creation unit 12 determines that the number of display points in the trend graph is too large, and that the combination is an unusable combination of time axis and display period for a trend graph.

[0027] The graph creation unit 13 creates a trend graph using a combination of time axis and display period selected by the user. The vertical axis of the trend graph (acquired monitoring data) is not to be changed.

[0028] The display device 50 displays a trend graph and a table window. For example, if the user instructs the display device 50 to open a table window while the display device 50 is displaying a trend graph, the table creation unit 12 causes the display device 50 to open a new window and display the table window.

[0029] <Processing procedure for display method in display device 1> Figure 4 is a flowchart illustrating the processing procedure of the display device 1 according to an embodiment of the present invention. First, the display device 50 displays a trend graph on the screen (S11).

[0030] Next, the instruction determination unit 11 determines whether or not the user has given an instruction to open the table window (S12). If the user has not given an instruction to open the table window (S12, No), the process in step S12 is repeated.

[0031] Furthermore, if the user instructs the system to open a table window (S12, Yes), the table creation unit 12 creates a table in which the combination of the time axis and display period of the trend graph is expressed (S13). The table creation unit 12 then displays the created table in the table window of the display device 50 (S14).

[0032] Next, the instruction determination unit 11 determines whether the user has selected a jump button on the table window (S15). If the user has not selected a jump button on the table window (S15, No), the process in step S15 is repeated.

[0033] Furthermore, if the user selects a jump button in the table window (S15, Yes), the graph creation unit 13 creates a trend graph using a scale that corresponds to the combination of time axis and display period selected by the user (S16).

[0034] Next, the graph creation unit 13 displays the created trend graph on the display device 50 (S17). Then, the control unit 10 determines whether or not to terminate the process (S18). For example, if the user gives a command to terminate the process via the input unit 40 (S18, Yes), the process terminates. If the user does not give a command to terminate the process (S18, No), the process returns to step S12 and the subsequent processes are repeated.

[0035] <Effects of Display Device 1> As described above, according to the display device 1 of this embodiment, the graph creation unit 13 creates a trend graph using a combination of time axis and display period selected by the user from the table, and displays the created trend graph on the display unit 50. Therefore, the user can understand the scale of the displayable trend graph in advance, thereby improving user operability.

[0036] Furthermore, the display unit 50 displays combinations of time axes and display periods for trend graphs that cannot be displayed in a table for easy identification. Therefore, users can understand the scale of trend graphs that cannot be displayed in advance, thereby improving user operability.

[0037] Furthermore, the table creation unit 12 determines the combination of a time axis and display period for a trend graph that cannot be displayed based on whether the value obtained by dividing the time axis by the display period is smaller than a first predetermined value or larger than a second predetermined value. Therefore, it is possible to easily determine the combination of a time axis and display period for a trend graph that cannot be displayed.

[0038] Furthermore, the display unit 50 displays the combination of the time axis and display period of the trend graph currently being displayed in a table that can be identified. Therefore, user operability can be further improved.

[0039] Furthermore, the display unit 50 displays the combination of the time axis and display period selected by the user in an identifiable manner in a table. Therefore, user operability can be further improved.

[0040] [Examples of implementation using software] The control block of the display device 1 (particularly the control unit 10) may be implemented by logic circuits (hardware) formed on an integrated circuit (IC chip) or the like, or by software.

[0041] In the latter case, the display device 1 includes a computer that executes instructions for a program, which is software that realizes each function. This computer includes, for example, one or more processors and a computer-readable recording medium that stores the program. The object of the present invention is achieved when the processor reads the program from the recording medium and executes it in the computer. For example, a CPU (Central Processing Unit) can be used as the processor. As the recording medium, a "tangible medium that is not temporary," such as ROM (Read Only Memory), can be used, as well as tape, disk, card, semiconductor memory, programmable logic circuit, etc. It may also further include RAM (Random Access Memory) for deploying the program. Furthermore, the program may be supplied to the computer via any transmission medium capable of transmitting the program (such as a communication network or broadcast wave). In one aspect of the present invention, the program can also be realized in the form of a data signal embedded in a carrier wave, which is embodied by electronic transmission.

[0042] 〔summary〕 A display device according to embodiment 1 of the present invention comprises: a table creation unit that creates a table of combinations of time axis and display period of a trend graph; a display unit that displays the table created by the table creation unit; a determination unit that determines a combination of time axis and display period selected by the user from the table displayed by the display unit; and a graph creation unit that creates a trend graph using the combination of time axis and display period selected by the user and displays the created trend graph on the display unit.

[0043] In the display device according to aspect 2 of the present invention, in aspect 1, the display unit displays combinations of time axes and display periods of trend graphs that cannot be displayed in the table in an identifiable manner.

[0044] In the display device according to embodiment 3 of the present invention, in embodiment 1 or 2, the table creation unit determines the combination of the time axis and display period of the undisplayable trend graph based on whether the value obtained by dividing the time axis by the display period is smaller than a first predetermined value or whether the value is larger than a second predetermined value.

[0045] In the display device according to aspect 4 of the present invention, in any of aspects 1 to 3 above, the display unit displays in the table in a way that allows identification of the combination of the time axis and display period of the trend graph currently being displayed by the display unit.

[0046] In the display device according to aspect 5 of the present invention, in any of aspects 1 to 4 above, the display unit displays the time axis and display period selected by the user in an identifiable manner in the table.

[0047] The display method according to aspect 6 of the present invention involves creating a table of combinations of time axis and display period for a trend graph, displaying the created table, determining the combination of time axis and display period selected by the user from the displayed table, creating a trend graph using the combination of time axis and display period selected by the user, and displaying the created trend graph.

[0048] A program according to aspect 7 of the present invention causes a computer to perform the following processes: creating a table of combinations of time axis and display period for a trend graph; displaying the created table; determining a combination of time axis and display period selected by the user from the displayed table; creating a trend graph using the combination of time axis and display period selected by the user; and displaying the created trend graph.

[0049] [Additional Notes] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0050] 1 Display device 10 Control Unit 11 Instruction judgment section 12 Table Creation Section 13. Graph Creation Section 20 Memory section 30 Communications Department 40 Input section 50 Display

Claims

1. A table creation unit that creates a table format of the combination of the time axis and display period of the trend graph, A display unit that displays the table created by the table creation unit, A determination unit determines a combination of time axis and display period selected by the user from the table displayed by the aforementioned display unit, A graph creation unit that creates a trend graph using a combination of time axis and display period selected by the user, and displays the created trend graph on the display unit, A display device equipped with the following features.

2. The display unit displays combinations of time axes and display periods for trend graphs that cannot be displayed in the table in a way that allows them to be identified. The display device according to claim 1.

3. The table creation unit determines the combination of the time axis and display period of the undisplayable trend graph based on whether the value obtained by dividing the time axis by the display period is smaller than a first predetermined value or larger than a second predetermined value. The display device according to claim 2.

4. The display unit displays the combination of the time axis and display period of the trend graph currently being displayed by the display unit in an identifiable manner in the table. The display device according to any one of claims 1 to 3.

5. The display unit displays the time axis and display period selected by the user in an identifiable manner in the table. The display device according to any one of claims 1 to 3.

6. Create a table showing the combination of the time axis and display period of the trend graph. Display the table you created, From the displayed table, the system determines the combination of time axis and display period selected by the user. A trend graph is created using the combination of time axis and display period selected by the user. Display the created trend graph. Display method.

7. On the computer, The process of creating a tabular format of the combination of the time axis and display period of the trend graph, The process of displaying the created table, The process involves determining the combination of the time axis and display period selected by the user from the displayed table, A process to create a trend graph using the combination of time axis and display period selected by the user, The process of displaying the created trend graph, A program that executes the command.

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