Display control device, display control method, and program

Abstract

Provides the user with information to display the cursor with simple operations. [Solution] When the cursor disappears from the display unit due to a first operation, the control unit of the scientific calculator displays first information on the display unit indicating a number button that is an operation button for displaying the cursor on the display unit.

Description

Technical Field

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

Background Art

[0002] For example, Patent Document 1 describes a configuration in which a cursor indicating an input position of characters or numbers on a display unit can be moved by pressing a direction key.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technology described in Patent Document 1, it is not possible to present information to the user for displaying a cursor with a simple operation.

[0005] The present invention has been made in view of the above problems, and an object thereof is to present information to the user for displaying a cursor with a simple operation.

Means for Solving the Problems

[0006] To solve the above problems, a display control device according to the present invention includes a plurality of operation buttons, and a control unit that causes the display unit to display first information indicating the operation buttons for displaying the cursor on the display unit when the cursor is made invisible on the display unit by a first operation by the user.

Effects of the Invention

[0007] According to the present invention, information for displaying a cursor with a simple operation can be presented to the user.

Brief Description of the Drawings

[0008] [Figure 1] This is a plan view showing the overview of a scientific calculator. [Figure 2] This is a block diagram showing the functional configuration of a scientific calculator. [Figure 3] This flowchart shows the flow of the enlarged display process performed by the control unit in Figure 2. [Figure 4] This diagram shows an example of the operating procedure and screen transitions from zooming in on a screen displaying a mathematical formula to confirming the display range. [Figure 5] This figure shows an example of the operation procedure and screen transitions when displaying the cursor. [Figure 6] This figure shows an example of a display that shows the correspondence between the numbers indicating number buttons and the displayed position of the cursor. [Figure 7] (a) is a diagram showing an example of how the first piece of information is displayed in a section where a mathematical formula consists of a single line, and (b) is a diagram showing the cursor position corresponding to each piece of first information shown in (a). [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are subject to various technically preferred limitations for carrying out the present invention. Therefore, the technical scope of the present invention is not limited to the following embodiments and illustrated examples. In this embodiment, the case in which the display control device according to the present invention is applied to a scientific calculator 1 will be described as an example. First, the configuration of the scientific calculator 1 will be described. As shown in Figures 1 and 2, the scientific calculator 1 includes a control unit 11, a display unit 12, an operation unit 13, a communication unit 14, a storage unit 15, a power supply unit 16, etc. Each part of the scientific calculator 1 is connected by a bus 17.

[0010] The control unit 11 is a computer that controls each part of the scientific calculator 1. The control unit 11 is composed of a CPU (Central Processing Unit) and RAM (Random Access Memory). The CPU of the control unit 11 reads a specified program from the system programs and various application programs stored in the memory unit 15, loads it into the working area of ​​the RAM, and executes various processes in cooperation with the program loaded into the RAM. The CPU of the control unit 11 may consist of multiple CPUs, and multiple processes executed by one CPU may be divided and executed by multiple CPUs.

[0011] The display unit 12 is composed of, for example, a liquid crystal display (LCD). The display unit 12 displays various data such as strings, mathematical formulas, and calculation results that are input by the operation of the operation unit 13, in accordance with the control of the control unit 11. In this embodiment, the case in which the display unit 12 is a color liquid crystal display will be described as an example. The operation unit 13 is equipped with a plurality of operation buttons and outputs an operation signal to the control unit 11 corresponding to the operation button operated by the user. For example, as shown in Figure 1, the operation unit 13 is equipped with a SHIFT button 21, a PAGE UP button 22, a PAGE DOWN button 23, up / down / left / right directional buttons 24, an OK button 25, a plurality of number buttons 26, etc.

[0012] The communication unit 14 is a communication module for wirelessly connecting with external devices (not shown) and for sending and receiving data with those external devices. The storage unit 15 is a memory (for example, a semiconductor memory) that stores programs and various data. In this embodiment, the storage unit 15 stores programs for the control unit 11 to execute various functions of the scientific calculator 1, data necessary for program execution, etc. The power supply unit 16 is composed of batteries or the like and supplies power to each part of the scientific calculator 1.

[0013] Next, let's explain the operation of Scientific Calculator 1. Generally, the display screen of a calculator is small, making it difficult to read small characters such as exponents when entering long and complex mathematical formulas. One might consider enlarging the displayed formula, but when the formula is enlarged, part of the formula disappears from the screen. Therefore, the user needs to adjust the display area on the screen by repeatedly pressing the directional keys (direction buttons) to make the desired part visible. Also, when correcting a specific part of a long and complex formula, if the cursor is far from the point to be corrected, it is necessary to repeatedly press the directional keys to move the cursor, which is a cumbersome operation.

[0014] Therefore, in accordance with this embodiment, the control unit 11 of the scientific calculator 1 enlarges the mathematical formula displayed on the display unit 12 in response to user operation, and displays information B (second information: see, for example, Figure 4) on the display unit 12 indicating a number button 26 for moving the display range on the display unit 12. When a number button 26 is pressed (operated), the control unit 11 moves the display range displayed on the screen of the display unit 12 according to the pressed number button 26. Furthermore, when an operation to confirm the display range of the mathematical formula to be displayed on the display unit 12 (first operation) is performed, the control unit 11 displays information A (first information: see, for example, Figure 4) on the display unit 12 indicating a number button 26 for displaying a cursor C. When a number button 26 is pressed, the control unit 11 displays the cursor C at a predetermined position corresponding to the pressed number button 26.

[0015] The following describes the magnified display process for performing the above operation of the scientific calculator 1, with reference to the flowchart in Figure 3. Note that the display unit 12 is assumed to display the entered mathematical formula as shown in 12a of Figure 4, but it may also display text. First, the control unit 11 determines whether a predetermined operation (second operation; for example, pressing the SHIFT button 21 and the PAGE UP button 22) instructing a transition to the magnified display mode has been performed (step S1). If it is determined that the predetermined operation instructing a transition to the magnified display mode has not been performed (step S1; NO), the control unit 11 returns to step S1.

[0016] When it is determined that a predetermined operation instructing a transition to the enlarged display mode has been performed (step S1; YES), the control unit 11 shifts to the enlarged display mode and enlarges and displays the mathematical formula (display target) displayed on the display unit 12 at a predetermined magnification rate (step S2). Here, the control unit 11 enlarges the mathematical formula at a magnification rate such that, for example, the mini-font (font such as an exponent) in the mathematical formula becomes the same size as the normal font before enlargement. As shown in 12a to 12b of FIG. 4, the control unit 11 enlarges the mathematical formula so that the upper left of the mathematical formula comes to the upper left of the screen.

[0017] Next, the control unit 11 determines whether or not the enlarged mathematical formula fits within the screen of the display unit 12 (step S3). When it is determined that the enlarged mathematical formula fits within the screen of the display unit 12 (step S3; YES), the control unit 11 proceeds to step S11. When it is determined that the enlarged mathematical formula does not fit within the screen of the display unit 12 (step S3; NO), the control unit 11 shifts to the display target range designation mode and assigns the numeric button 26 to the screen displayed on the display unit 12 (step S4). Then, the control unit 11 causes information B corresponding to the number of the assigned numeric button 26 to be displayed in a first color (for example, red) at the position where the numeric button 26 is assigned (step S5).

[0018] For example, the control unit 11 assigns each numeric button 26 to a position corresponding to the arrangement position of each operation unit 13 of the plurality of numeric buttons 26 on the screen of the display unit 12. Specifically, 7 is assigned to the leftmost position in the uppermost row of the screen, 8 to the center, and 9 to the rightmost position, 4 is assigned to the leftmost position in the middle row, 5 to the center, and 6 to the rightmost position, and 1 is assigned to the leftmost position in the lowermost row of the screen, 2 to the center, and 3 to the rightmost position. Then, as shown in 12b of FIG. 4, at least a part of the numbers of the assigned numeric buttons 26 is displayed in a predetermined color (for example, red) at the position where the numeric button 26 is assigned on the screen of the display unit 12. The displayed numbers become the information B indicating the numeric button 26 for moving the display target range of the mathematical formula.

[0019] Next, the control unit 11 determines whether any of the numeric buttons 26 has been pressed (step S6). If it is determined that any of the numeric buttons 26 has been pressed (step S6; YES), the control unit 11 moves the display target range in the direction toward the position where the information B corresponding to the number of the numeric button 26 pressed from the center of the display unit 12 is displayed (step S7), and proceeds to step S10. For example, in the state shown in 12b of FIG. 4, when the numeric button 26 with the number "3" is pressed, the control unit 11 moves the display target range on the screen of the display unit 12 in the direction where "3" is displayed from the center of the display unit 12 as shown in 12c of FIG. 4. In the state shown in 12c of FIG. 4, when the numeric button 26 with the number "9" is further pressed, the display target range on the screen of the display unit 12 is moved in the direction where "9" is displayed from the center of the display unit 12 as shown in 12d of FIG. 4. Thus, in the present embodiment, the information B (second information), which is the number indicating the numeric button 26, for realizing the movement of the display target range with a simple operation can be presented. The user can easily move the display target range only by performing a simple operation of pressing the numeric button 26 corresponding to the number in the desired direction of the display target range.

[0020] On the other hand, in step S6, if it is determined that the numeric button 26 has not been pressed (step S6; NO), the control unit 11 determines whether any of the direction buttons 24 has been pressed (step S8). If it is determined that none of the direction buttons 24 has been pressed (step S8; NO), the control unit 11 returns to step S6. If it is determined that any of the direction buttons 24 has been pressed (step S8; YES), the control unit 11 moves the display target range one row or one column (for one character (number)) in the direction corresponding to the pressed direction button 24 (step S9), and proceeds to step S10. Note that when it is determined that any of the direction buttons 24 has been pressed, the control unit 11 may also shift to the cursor position designation mode in step S11.

[0021] In step S10, the control unit 11 determines whether or not the OK button 25 has been pressed (step S10). Pressing the OK button 25 is the operation to confirm the display target range (first operation). If it is determined that the OK button 25 has not been pressed (step S10; NO), the control unit 11 returns to step S6. If it is determined that the OK button 25 has been pressed (step S10; YES), the control unit 11 proceeds to step S11.

[0022] In step S11, the control unit 11 switches to cursor position specification mode and assigns the number buttons 26 to the screen displayed on the display unit 12 (step S11). Then, the control unit 11 displays information A corresponding to the number of the assigned number button 26 in a second color (for example, blue) at the position to which the number button 26 is assigned (step S12). It is preferable that the second color be different from the first color in order to distinguish it from the display target range specification mode described above.

[0023] For example, the control unit 11 assigns each of the number buttons 26 to a position on the screen of the display unit 12 that corresponds to the position of each of the number buttons 26 on the respective operation unit 13. Specifically, it assigns 7 to the leftmost position, 8 to the center, and 9 to the rightmost position in the top row of the screen; 4 to the leftmost position, 5 to the center, and 6 to the rightmost position in the middle row; and 1 to the leftmost position, 2 to the center, and 3 to the rightmost position in the bottom row of the screen. Then, as shown in Figure 4, 12e and Figure 5, 12f, at least a portion of the numbers of the assigned number buttons 26 are displayed in a predetermined color (for example, blue) at the position on the screen of the display unit 12 where the number buttons 26 are assigned. The displayed numbers become information A, which indicates the number button 26 for displaying cursor C. Cursor C is an indicator that shows the position where a character or number is entered in a mathematical formula or string. Cursor C is not displayed on the screen where the first information is displayed.

[0024] Furthermore, when the control unit 11 displays information A corresponding to the numbers on the number buttons 26, it may also display an indicator D indicating the position where cursor C will be displayed when the corresponding number button 26 for each piece of information A is pressed, as shown in Figure 6. In this case, the control unit 11 may display each piece of information A and the indicator D indicating the display position of cursor C when the corresponding number button 26 for that piece of information A is pressed using the same display method (for example, the same display color, the same density, the same font). This makes it easier for the user to recognize the correspondence between information A and the display position of cursor C.

[0025] Furthermore, when the control unit 11 assigns the number buttons 26 to the screen, it may assign multiple number buttons 26 to the same position on the screen depending on the form of the mathematical expression. For example, as shown in Figure 7(a), in places where the mathematical expression consists of one line, the control unit 11 assigns multiple number buttons 26, which are divided into upper, middle, and lower sections of the screen as shown in Figure 5, etc., to one location, for example, the upper section. Then, the information A corresponding to the numbers of the multiple number buttons 26 assigned to one location is displayed together in a predetermined color (for example, blue) at the location on the screen of the display unit 12 where these number buttons 26 are assigned. The position of the cursor C displayed in response to each pressing of the multiple number buttons 26 indicated by the multiple information A displayed in one place is the same. For example, the position of the cursor C displayed in response to each pressing of the number buttons 26 indicated by "2", "5", and "8" shown in Figure 7(a) is the same as shown by the arrows corresponding to "2, 5, 8" in Figure 7(b).

[0026] Next, the control unit 11 determines whether or not one of the number buttons 26 has been pressed (step S13). If it determines that one of the number buttons 26 has been pressed (step S13; YES), the control unit 11 displays a cursor C at a predetermined position corresponding to the pressed number button 26, hides the display of information A, and exits the cursor position specification mode (step S14). The predetermined position corresponding to the pressed number button 26 is, for example, the position where the cursor C can be displayed closest to the position where information A corresponding to the pressed number button 26 is displayed. In other words, the positions where multiple pieces of information A corresponding to each of the multiple number buttons 26 are displayed correspond to the positions where the cursor C is displayed when each of the number buttons 26 is pressed.

[0027] For example, in the state shown in Figure 5, 12f, if the number button 26 labeled "1" is pressed, cursor C will be displayed at the cursor position in the lower left of the formula closest to "1" in Information A, as shown in Figure 5, 12g. In the state shown in Figure 5, 12f, if the number button 26 labeled "8" is pressed, cursor C will be displayed at the cursor position in the upper center of the formula closest to "8" in Information A, as shown in Figure 5, 12h. Note that, as shown in Figure 7, if any of the number buttons 26 corresponding to Information A are displayed together in one place, pressing any of them will display cursor C at the same position.

[0028] For example, as shown in Figure 1, if at least some of the operation buttons (in this case, number buttons 26) for displaying cursor C are arranged in a vertical column, the control unit 11, when displaying a mathematical expression including a fraction on the display unit 12, will display cursor C in the numerator if it determines that one of the upper buttons among the multiple operation buttons (for example, "7", "8", or "9" of the number buttons 26 in Figure 1) has been pressed, and will display cursor C in the denominator if it determines that one of the lower buttons among the multiple operation buttons (for example, "1", "2", or "3" of the number buttons 26 in Figure 1) has been pressed. Furthermore, if at least some of the operation buttons for displaying cursor C (in this case, number buttons 26) are arranged in a vertical column, the control unit 11, when displaying a mathematical expression including an integral symbol on the display unit 12, determines that an upper button among the multiple operation buttons (for example, "7", "8", or "9" of the number buttons 26 in Figure 1) has been pressed, displays cursor C above the integration interval corresponding to the integral symbol. If the control unit 11 determines that a lower button among the multiple operation buttons (for example, "1", "2", or "3" of the number buttons 26 in Figure 1) has been pressed, it displays cursor C at the bottom of the integration interval corresponding to the integral symbol.

[0029] According to the above process, the user can display cursor C at the desired position with a simple operation: pressing the number button 26 corresponding to the number A (first information) displayed closest to the position where cursor C is to be displayed. Therefore, there is no need to perform the complicated operation of repeatedly pressing the direction buttons 24, etc., to move cursor C to the desired position, as in the conventional method. However, even if the cursor can be displayed at a predetermined position corresponding to the pressed operation button when any operation button is pressed, the operation cannot be performed if the user does not know which operation button is the one that displays cursor C on the display unit 12. In this embodiment, information A (first information), which is the number indicating the number button 26 for displaying cursor C, can be presented to the user, so the user can display cursor C with a simple operation. Furthermore, since information A (first information) is displayed at the position that indicates the position where cursor C will be displayed when the operation button indicated by information A (first information) is pressed (the position corresponding to the position where cursor C will be displayed), the user can display the cursor at the desired position with a simple operation.

[0030] Next, the control unit 11 determines whether an input operation such as pressing the directional buttons 24 or the number buttons 26 has been performed (step S15). If it determines that an input operation such as pressing the directional buttons 24 or the number buttons 26 has been performed (step S15; YES), the control unit 11 performs a process to move the cursor C or input a number at the position of the cursor C according to the operation (step S16), and then proceeds to step S17. If it determines that an input operation such as pressing the directional buttons 24 or the number buttons 26 has not been performed (step S15; NO), the control unit 11 proceeds to step S17.

[0031] In step S17, the control unit 11 determines whether a predetermined operation to return to specifying the cursor position (for example, pressing the SHIFT button 21 and the PAGE UP button 22) has been performed (step S17). If it is determined that a predetermined operation to return to specifying the cursor position has been performed (step S17; YES), the control unit 11 returns to step S3.

[0032] If the control unit 11 determines that a predetermined operation to return to specifying the cursor position has not been performed (step S17; NO), it determines whether a predetermined operation to exit the magnified display mode (for example, pressing the SHIFT button 21 and the PAGE DOWN button 23) has been performed (step S18). If the control unit 11 determines that a predetermined operation to exit the magnified display mode has not been performed (step 18; NO), it returns to step S15. If the control unit 11 determines that a predetermined operation to exit the magnified display mode has been performed (step 18; YES), it exits the magnified display mode and returns to displaying the formula at normal size (step S19), and terminates the magnified display process.

[0033] As explained above, when the cursor C disappears from the display unit 12 due to the first operation, the control unit 11 of the scientific calculator 1 displays information A (first information) on the display unit 12 indicating the numeric button 26, which is the operation button for displaying the cursor C on the display unit 12. Therefore, information for displaying the cursor with a simple operation can be presented to the user. Furthermore, the numeric button 26 is a button for displaying the cursor C at a predetermined position on the display unit 12, and the control unit 11 displays information A (first information) indicating the numeric button 26 at a position that indicates the predetermined position where the cursor C is displayed (a position corresponding to the predetermined position) in response to the pressing of the numeric button 26. Therefore, information for displaying the cursor C at a predetermined position with a simple operation can be presented to the user.

[0034] Furthermore, when the control unit 11 determines that a number button 26 has been operated, it displays cursor C at a predetermined position on the display unit 12 and hides information A (first information). Therefore, after displaying cursor C at the predetermined position, information A (first information) can be hidden. In addition, the control unit 11 displays an indicator D on the display unit 12 indicating the position of cursor C, which is displayed in response to the operation of the number button 26, in the same display manner as information A (first information). Therefore, the user can confirm the position where cursor C is displayed when they press a number button 26.

[0035] Furthermore, the scientific calculator 1 is equipped with multiple number buttons 26, and the control unit 11 displays multiple pieces of information A (first information) corresponding to each of the multiple number buttons 26 at positions corresponding to the position where cursor C will be displayed when each of the number buttons 26 is operated. Therefore, the user can easily recognize which operation button to operate to display the cursor at the desired position. In addition, the display position of each piece of information A (first information) in the display unit 12 corresponds to the arrangement position of the number buttons 26 corresponding to each piece of information A (first information) in the operation unit 13 where the multiple number buttons 26 are arranged. Therefore, the user can intuitively recognize the position where cursor C will be displayed by operating each of the number buttons 26.

[0036] Furthermore, if at least some of the number buttons 26 are arranged in a vertical column, and the control unit 11 is displaying a fraction on the display unit 12, it will display cursor C in the numerator if it determines that one of the upper number buttons 26 has been operated, and cursor C in the denominator if it determines that one of the lower number buttons 26 has been operated. Also, if at least some of the number buttons 26 are arranged in a vertical column, and the control unit 11 is displaying an integral symbol on the display unit 12, it will display cursor C at the upper end of the integral interval corresponding to the integral symbol if it determines that one of the upper number buttons 26 has been operated, and cursor C at the lower end of the integral interval corresponding to the integral symbol if it determines that one of the lower number buttons 26 has been operated. Therefore, the user can intuitively display cursor C at the desired position. In addition, if the position where cursor C is displayed in response to the operation of the number buttons 26 is the same for multiple number buttons 26, the control unit 11 will display multiple pieces of information A (first information) corresponding to the multiple number buttons 26 side by side on the display unit 12. Therefore, the user can easily recognize the number button 26, which is located in the same position as cursor C.

[0037] Furthermore, when the control unit 11 determines that it has received a second operation instructing the display unit 12 to enlarge the information displayed on the display unit 12, it enlarges the display area shown on the display unit 12 and displays information B (second information) on the display unit 12 indicating the number buttons 26 for moving the display area. Thus, information for easily changing the display area when enlarged can be presented to the user. Also, when the control unit 11 determines that the number buttons 26 have been operated, it moves the display area from the center of the display unit 12 toward the position where information B (second information) is displayed on the display unit 12. Thus, the user can easily move the display area when enlarged.

[0038] Furthermore, the first operation described above is an operation to determine the display range. Therefore, when the cursor C is not displayed on the display unit 12 due to the operation to determine the display range, information can be presented to the user to display the cursor with a simple operation.

[0039] The descriptions in the above embodiments are preferred examples of the display control device, display control method, and program according to the present invention, and are not limited thereto. For example, in the above embodiments, the function of the display control device according to the present invention was described using the example of a scientific calculator 1, but the display control device is not limited to this example. For example, the display control device may be incorporated into a device for other purposes. Also, in the above embodiments, the operation buttons for displaying the cursor C on the display unit 12 and the operation buttons for moving the display target range were described using the example of numeric buttons 26, but these operation buttons are not limited to numeric buttons 26. Also, in the above embodiments, the case in which the present invention is applied to the display of the cursor C in the enlarged display mode was described using the example, but the present invention may also be applied to the display of the cursor C when displaying at normal size.

[0040] Furthermore, while the above embodiment discloses an example in which semiconductor memory is used as a computer-readable medium for the program according to the present invention, the invention is not limited to this example. Other computer-readable mediums that can be used include hard disks, SSDs, and portable recording media such as CD-ROMs. In addition, carrier waves can also be used as a medium for providing the data of the program according to the present invention via a communication line.

[0041] Although embodiments and modifications of the present invention have been described above, the technical scope of the present invention is not limited to the embodiments and modifications described above, but is determined based on the claims. Furthermore, equivalent scopes of the present invention that have been modified from the claims but are not related to the essence of the present invention are also included in the technical scope of the present invention. [Explanation of Symbols]

[0042] 1 Scientific calculator, 11 Control unit, 12 Display unit, 13 Operation unit

Claims

1. Equipped with multiple control buttons, A control unit that, when the cursor disappears from the display unit due to a first operation by the user, displays first information on the display unit indicating the operation button for making the cursor appear on the display unit. A display control device equipped with the following features.

2. The aforementioned operation button is a button for displaying the cursor at a predetermined position on the display unit. The control unit causes the first information to be displayed at the position indicating the predetermined position. The display control device according to claim 1.

3. When the control unit determines that the operation button has been operated while the first information is displayed, it places the cursor at a predetermined position on the display unit and hides the first information. The display control device according to claim 1.

4. The control unit displays the plurality of first pieces of information corresponding to each of the plurality of operation buttons at a position corresponding to the position where the cursor is displayed when each of the operation buttons is operated. The display control device according to claim 1.

5. The display position of each of the first pieces of information in the display unit corresponds to the position of the operation button corresponding to each of the first pieces of information in the operation unit where the plurality of operation buttons are arranged. The display control device according to claim 1.

6. The multiple operation buttons are arranged in a vertical column, at least some of them are arranged in a vertical column. When the control unit is displaying a fraction on the display unit, if it determines that the upper button among the multiple operation buttons has been operated, it displays the cursor in the numerator, and if it determines that the lower button among the multiple operation buttons has been operated, it displays the cursor in the denominator. The display control device according to claim 1.

7. The multiple operation buttons are arranged in a vertical column, at least some of them are arranged in a vertical column. When the control unit is displaying an integral symbol on the display unit, if it determines that one of the upper buttons among the multiple operation buttons has been operated, it displays the cursor at the upper end of the integration interval corresponding to the integral symbol; and if it determines that one of the lower buttons among the multiple operation buttons has been operated, it displays the cursor at the lower end of the integration interval corresponding to the integral symbol. The display control device according to claim 1.

8. The control unit, when the predetermined position where the cursor is displayed in response to the operation of the operation button is the same for multiple operation buttons, displays multiple pieces of first information corresponding to multiple operation buttons in a row on the display unit. The display control device according to claim 1.

9. The control unit causes the display unit to display an indicator on the display unit that shows the position of the cursor, which is displayed in response to the operation of the operation button, in the same display manner as the first information. The display control device according to claim 1.

10. When the control unit determines that it has received a second operation instructing the display unit to enlarge the display of the information displayed on the display unit, it enlarges the display area shown on the display unit and displays second information on the display unit indicating operation buttons for moving the display area. The display control device according to claim 1.

11. When the control unit determines that the operation button has been operated, it moves the display target range in a direction toward the position on the display unit where the second information is displayed, The display control device according to claim 10.

12. The first operation described above is an operation to determine the display target range. The display control device according to claim 10.

13. The computer of a display control device equipped with a display unit and multiple operation buttons, When the cursor disappears from the display unit due to a first operation by the user, first information indicating an operation button to make the cursor reappear on the display unit is displayed on the display unit. Display control method.

14. A computer for a display control device that includes a display unit and multiple operation buttons, Control means that, when the cursor disappears from the display unit due to a first operation by the user, displays first information on the display unit indicating an operation button for making the cursor reappear on the display unit. A program designed to function as such.

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