Electronic apparatus, and display control method

Abstract

To notify a user of especially important information in information of power sources supplying power to an electronic apparatus in such a manner that the time of disturbance of observation of an image of a subject displayed on a display section by a user is shortened.SOLUTION: An electronic apparatus (1) capable of switching an operation using first power supplied from a first power source (3) and an operation using second power supplied from a second power source (4) comprises: a display section (155) on which an image of a subject picked up by an imaging section (153) is displayed; and a display control section (162) by which, when a supply power source supplying power for operating the electronic apparatus is switched, display of information (503, 505) indicating the switching of the supply power source on a region, where the image of the subject is displayed, in the display section is started and within a predetermined subsequent period, the information is brought into a non-display state.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to an electronic device and a display control method.

Background Art

[0002] Some electronic devices are of a two-power-supply type that can switch between operating on power supplied from an external power source via an AC adapter or the like and operating on power supplied from a battery mounted on the electronic device body (see, for example, Patent Documents 1 to 3). Generally, for this type of electronic device, operation using power supplied from an external power source is prioritized, and when power is not supplied from the external power source, it operates using power supplied from the battery.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] As a two-power-supply type electronic device, there is one that can magnify and display an image of a subject captured by an imaging unit on a display unit, which may be called an electronic loupe. In order to provide a similar feeling of use to a loupe that can observe an image optically enlarged by a lens, it is desirable not to display information other than the image of the subject when the user is observing the image of the subject displayed on the display unit.

[0005] However, if information other than the image of the subject is not displayed on the display unit, the user may not notice that the power supply has been switched. For this reason, for example, the user may not notice that the power supply has been switched from an external power supply to a battery, and the operation by the power supplied from the battery that the user does not intend may continue, consuming the power of the battery.

[0006] In one aspect, an object of the present invention is to notify a user of particularly important information among the information on the power supply that supplies power to an electronic device so as to minimize the interference with the user's observation of the image of the subject displayed on the display unit for a short time.

Means for Solving the Problems

[0007] An electronic device according to one aspect is an electronic device capable of switching between an operation by first power supplied from a first power supply and an operation by second power supplied from a second power supply, the electronic device including a display unit on which an image of a subject captured by an imaging unit is displayed, and a display control unit that starts to display information indicating that the supply power supply has been switched in a region where the image of the subject is displayed on the display unit when the supply power supply that supplies power to operate the electronic device is switched, and then makes the information non-displayed within a predetermined period.

Effects of the Invention

[0008] According to the above aspect, among the information on the power supply that supplies power to the electronic device, particularly important information can be notified to the user so as to minimize the interference with the user's observation of the image of the subject displayed on the display unit for a short time.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, an electronic device called an electronic loupe is exemplified as the electronic device according to the present invention. Detailed descriptions of well-known configurations, functions, operations, etc. related to the exemplified electronic loupe are omitted.

[0011] The housing of the electronic loupe 1 illustrated in FIG. 1 has a main body portion 101 and a handle portion 102.

[0012] The main body portion 101 has a substantially rectangular parallelepiped outer shape, and a display device 111 is disposed on the first surface. The display device 111 can be a dot matrix type liquid crystal display or other display device capable of displaying a digital image. An imaging device and an illumination device (not shown) are disposed on the second surface of the main body portion 101 facing the direction opposite to the first surface. The imaging device includes an imaging element such as a CCD image sensor or a CMOS image sensor and a lens. The illumination device can be an LED light. The electronic loupe 1 illustrated in FIG. 1 can enlarge and display an image within the imaging region 200 of the subject 2 imaged from the viewpoint P of the imaging device on the display device 111.

[0013] On the first surface of the main body portion 101, in addition to the display device 111, four buttons 121 to 124 are arranged. These four buttons 121 to 124 can be, for example, a button for enlarging the image of the subject 2 to be displayed on the display device 111, a button for reducing the image, a button for switching the display mode, and a button for storing the image displayed on the display device 111 as a screenshot. The display mode may include, for example, a first mode in which the image is enlarged or reduced as it is and displayed, and a second mode (sometimes called a newspaper mode) in which correction processing such as trapezoidal correction is performed on the image and then displayed. The number of buttons arranged on the first surface of the main body portion 101 is not limited to four. There may be no buttons arranged on the first surface of the main body portion 101.

[0014] On a third surface of the main body portion 101, which is different from the first and second surfaces, a handle portion 102 is connected. For example, a power button 125 for turning the power on / off is arranged on the handle portion 102. Also, the inside of the handle portion 102 can accommodate a battery that supplies operating power to the electronic loupe 1.

[0015] On a fourth surface of the main body portion 101, which is different from the first, second, and third surfaces, three buttons 126 to 128 and a connection terminal (not shown) for connecting an external power source are arranged. These three buttons 126 to 128 can be, for example, a button for switching the lighting on and off of the lighting device, a button for displaying the setting screen, and a button for displaying the stored image (screenshot) on the display device 111. Some of the four buttons 121 to 124 on the first surface and the three buttons 126 to 128 on the fourth surface may be buttons that provide a function different from the above functions when the setting screen is being displayed. For example, the button for enlarging the image and the button for reducing the image arranged on the first surface may function as buttons for selecting an item to be set among a plurality of setting items when the setting screen is being displayed.

[0016] The connection terminal (not shown) disposed on the fourth surface can be, for example, a terminal for connecting a DC plug attached to the power supply cable of an AC adapter, or a USB (Universal Serial Bus) terminal, and is exposed by removing the cover 129.

[0017] Note that the housing of the electronic loupe 1 according to the present embodiment is not limited to a specific shape. The housing of the electronic loupe 1 may have, for example, a shape that does not include the handle portion 102.

[0018] As shown in FIG. 2, the electronic loupe 1 of the present embodiment includes a control unit 151, a storage unit 152, an imaging unit 153, an illumination unit 154, a display unit 155, an input unit 156, and a power supply selection unit 157, which are connected by a bus 158 so as to be able to transmit and receive signals to and from each other. In this specification, the term "unit" associated with the function of the electronic loupe 1 may be read as "means". For example, the control unit 151 may be read as the control means 151.

[0019] The control unit 151 controls the operation of the electronic loupe 1 by executing a program stored in the storage unit 152. The storage unit 152 stores a program executed by the control unit 151, a screen shot of an image displayed on the display unit 155, and the like. The control unit 151 can be a processor such as a CPU (Central Processing Unit). The storage unit 152 includes a ROM (Read Only Memory) and a RAM (Random Access Memory). The functions of the control unit 151 and the storage unit 152 may be provided by a combination of a plurality of hardware elements or by a single hardware element.

[0020] The imaging unit 153 captures an image of the subject, and the illumination unit 154 illuminates the subject 2. The function of the imaging unit 153 can be provided by an imaging device including an imaging element such as a CCD image sensor or a CMOS image sensor and a lens, and the function of the illumination unit 154 can be provided by an LED light. The display unit 155 displays an image of the subject captured by the imaging unit 153 and subjected to predetermined image processing by the control unit 151. The function of the display unit 155 is provided by the display device 111.

[0021] The input unit 156 receives an input of a user operation on the electronic loupe 1. The function of the input unit 156 is provided by the above-described buttons 121 to 128.

[0022] The power supply selection unit 157 selects whether to use the external power supply 3 or the battery 4 as the power supply for supplying the operating power of the electronic loupe 1. The external power supply 3 is a power supply connected to the power supply selection unit 157 via the terminal connection unit 159. FIG. 2 shows, as an example of the external power supply 3, a combination of a commercial power supply (AC power supply) 301 and an AC adapter 302. The battery 4 is a power supply mounted inside the housing of the electronic loupe 1. The power supply selection unit 157 includes a detection unit 157A for detecting the power supply and a switching unit 157B for switching the power supply for supplying the operating power of the electronic loupe 1. The switching unit 157B selects and switches whether to use the external power supply 3 or the battery 4 as the power supply for supplying the operating power of the electronic loupe 1 according to the detection states of the external power supply 3 and the battery 4 by the detection unit 157A and the preset selection priority (see FIG. 3). The "priority supply power" in the table 170 illustrated in FIG. 3 is the power supply selected by the switching unit 157B as the power supply for supplying the operating power. Also, in the power of the battery in the table 170 illustrated in FIG. 3, "remaining amount" is intended to indicate a state where sufficient power remains to operate the electronic loupe 1. On the other hand, "no remaining amount" is intended to indicate a state where, although the battery 4 is mounted, no power necessary to operate the electronic loupe 1 remains, and "not detected" is intended to indicate a state where the battery 4 is not mounted. In the following description, operating the electronic loupe 1 with the power supplied from the AC adapter 302 is referred to as "AC adapter drive", and operating the electronic loupe 1 with the power supplied from the battery 4 is referred to as "battery drive". Also, the power supply for supplying the power to operate the electronic loupe 1 is referred to as the "supply power supply".

[0023] According to table 170 illustrated in FIG. 3, when the power supply selection unit 157 detects the power from the AC adapter 302, it selects the AC adapter 302 as the power supply regardless of the power state of the battery 4. When the power from the AC adapter 302 is not detected, the power supply selection unit 157 selects the battery 4 as the power supply only when the power of the battery 4 is "remaining". When the power from the AC adapter 302 (external power supply 3) is not detected and the power of the battery 4 is "no remaining" or "not detected", the power required to operate the electronic loupe 1 is not supplied (that is, the electronic loupe 1 does not operate), so the power supply is not selected.

[0024] When the user is observing the image of the subject 2 displayed on the display unit 155 (display device 111), the electronic loupe 1 according to the present embodiment does not display information other than the image of the subject 2 on the display device 111 as illustrated in FIG. 1. "When observing" in this specification is intended to mean when the process associated with the operation of the input unit 156 by the user (for example, the operation of pressing a button) is not performed. For example, when the user presses any one of the buttons 121 to 124, "when observing" is interrupted, and some information is displayed on the display device 111 in a state of overlapping the image of the subject 2, or after partially or entirely hiding the image of the subject 2 during the process of performing the process associated with the pressed button. For example, when the button for enlarging the image is pressed, the information regarding the display magnification of the image is displayed in a state of overlapping the image of the subject 2.

[0025] However, when information other than the image of the subject 2 is not displayed on the display unit 155 while observing the image of the subject 2, the user may not notice the unintentional switching of the power supply. For this reason, for example, the user may not notice that the power supply has switched from an external power supply to a battery, and the battery-driven operation may continue unintentionally by the user, consuming the battery power. In the electronic loupe 1 according to the present embodiment, when the power supply is switched, information indicating that the power supply has been switched is displayed on the display unit 155 (display device 111) for a predetermined period, so that the time during which the information indicating that the power supply has been switched hinders the user's observation of the image of the subject 2 is shortened. To provide such a display control function, the electronic loupe 1 according to the present embodiment includes a determination unit 161 and a display control unit 162 as illustrated in FIG. 2. The relationship between each of the determination unit 161 and the display control unit 162 in the electronic loupe 1 and other functional blocks is not limited to the relationship in which the determination unit 161 illustrated in FIG. 2 is included in the power supply selection unit 157 and the display control unit 162 is included in the control unit 151. For example, the determination unit 161 may be included in the control unit 151, or may be connected to the bus 158 as an independent functional block not included in other functional blocks. Further, for example, the functions of the determination unit 161 and the display control unit 162 may be provided by a single functional block.

[0026] The determination unit 161 determines whether the power supply has been switched. Specifically, the determination unit 161 determines whether the power supply has been switched from the external power supply 3 to the battery 4 during AC adapter driving, and determines whether the power supply has been switched from the battery 4 to the external power supply 3 during battery driving. When the determination unit 161 determines that the power supply has been switched, it notifies the display control unit 162 of the determination result. When the determination unit 161 determines that the power supply has been switched, the display control unit 162 causes the information indicating that the power supply has been switched to be displayed on the display unit 155 (display device 111) for a predetermined period. The predetermined period may be, for example, 3 seconds. The determination unit 161 included in the power supply selection unit 157 may determine whether the switching unit 157B has switched the power supply, and when it determines that the power supply has been switched, notify the display control unit 162 of the determination result.

[0027] When power from the AC adapter 302 is detected, the power supply selection unit 157 selects the AC adapter 302 as the power supply according to the table 170 illustrated in FIG. 3. As long as the AC adapter is being driven, as shown in the table 171 of FIG. 4, regardless of the detection state of the power of the battery 4, the power supply selected by the power supply selection unit 157 remains the AC adapter 302. Therefore, while the AC adapter is being driven, the determination unit 161 continues to determine that the power supply has not been switched. Based on this determination result, the display control unit 162 does not cause the display unit 155 (display device 111) to display information indicating that the power supply has been switched.

[0028] On the other hand, when the power of the battery 4 is "remaining", if the power from the AC adapter 302 is not detected, the electronic loupe 1 is driven by the battery. When the power from the AC adapter 302 is detected during battery drive, the power supply selection unit 157 switches the power supply from the battery 4 to the AC adapter 302 according to the table 170 of FIG. 3. At this time, the determination unit 161 determines that the power supply has been switched from the battery 4 to the AC adapter 302. Based on this determination result, the display control unit 162 causes the display unit 155 (display device 111) to display a mark indicating that the power supply has been switched to the AC adapter 302 for only 3 seconds. The "mark" in this specification is a graphic, color, character information, and any combination thereof that can notify the user through vision that the power supply has been switched.

[0029] Also, even if the power of the battery 4 is "with remaining amount", while the power from the AC adapter 302 is being detected, the electronic loupe 1 is driven by the AC adapter. When the power from the AC adapter 302 becomes undetectable during the AC adapter drive, the power supply selection unit 157 switches the supply power from the AC adapter 302 to the battery 4. At this time, the determination unit 161 determines that the supply power has been switched from the AC adapter 302 to the battery 4. Based on this determination, the display control unit 162 causes the display unit 155 (display device 111) to display a mark indicating that the supply power has been switched to the battery 4 for 3 seconds. The mark indicating the switch to the battery 4 may include, for example, information indicating the remaining amount of the power of the battery 4.

[0030] FIG. 5 shows an example of processing related to the switching of the supply power described above with reference to FIGS. 3 and 4 among various processes performed by the electronic loupe 1. The processing illustrated in FIG. 5 is performed by the determination unit 161 and the display control unit 162 of the electronic loupe 1.

[0031] After the power supply of the electronic loupe 1 is turned on, the determination unit 161 holds information on the current power supply (step S100), and determines whether the power from the AC adapter 302 has changed from detected to undetected (step S101). When it is determined that the power has changed from detected to undetected (step S101; YES), the determination unit 161 determines whether the detected state of the power of the battery 4 is "remaining" (step S105). In step S105, the determination unit 161 determines whether it is "remaining" based on, for example, whether the voltage value or current value associated with the power supplied from the battery 4 detected by the detection unit 157A is equal to or greater than a threshold value. The threshold value can be set, for example, to 10% of the maximum power of the battery 4. When it is determined that there is "remaining power" (step S105; YES), based on the determination result of the determination unit 161, the display control unit 162 causes the display unit 155 to display information indicating that the battery drive has been switched for a predetermined period (step S106). Thereafter, the processing after step S100 is repeated. On the other hand, when the detected state of the power of the battery 4 is not "remaining" (step S105; NO), the electronic loupe 1 turns off the power, and the processing along the flowchart illustrated in FIG. 5 ends. That is, when the remaining amount of power of the battery 4 is small or the power of the battery 4 is not detected, the power is turned off and nothing is displayed on the display unit 155, so that the user can quickly know that the power from the AC adapter 302 is no longer detected.

[0032] In step S101, when it is determined that the power from the AC adapter 302 has not changed from detected to undetected (step S101; NO), the determination unit 161 determines whether the current power supply is a battery (step S102). The determination unit 161 makes the determination in step S102 based on, for example, the information on the current power supply held in step S100. When it is determined that the current power supply is not the battery 4 (step S102; NO), since the current power supply is the AC adapter 302, the determination unit 161 returns to the determination in step S101.

[0033] When it is determined that the current power supply is the battery 4 (step S102; YES), the determination unit 161 determines whether the power from the AC adapter 302 has changed from undetectable to detectable (step S103). When it is determined that the power has not changed from undetectable to detectable (step S103; NO), the determination unit 161 repeats the determination in step S103. When it is determined that the power from the AC adapter 302 has changed from undetectable to detectable (step S103; YES), based on the determination result of the determination unit 161, the display control unit 162 causes the display unit 155 to display information indicating that the switching to the AC adapter drive has been made for a predetermined period (step S104). Thereafter, the processing from step S100 and subsequent steps is repeated.

[0034] When the electronic loupe 1 of the present embodiment is being driven by the AC adapter and the user is observing the image of the subject 2, only the image of the subject captured by the imaging unit 153 is displayed on the display unit 155 as shown in the left screen 501 of FIG. 6. For this reason, the user can also observe the portion displayed at the end of the screen 501 among the displayed images of the subject, and can obtain the same feeling of use as a loupe that can observe an image optically enlarged by the lens.

[0035] During AC adapter drive, for example, when the user moves the electronic loupe 1 in various directions or changes its orientation, or when a part of the user's body or another moving object catches on the cable of the AC adapter 302, the DC plug of the AC adapter 302 may come off from the electronic loupe 1. At this time, if only the image of the subject is displayed as in the left screen 501 of FIG. 6, there is a possibility that the user may not notice that the switching from AC adapter drive to battery drive has occurred. If the user does not notice the switching from AC adapter drive to battery drive, the power of the battery 4 may be consumed by the unintended battery drive, and there is a risk that the remaining amount will run out early when the user wants to use it in battery drive later. In particular, when the connection between the DC plug of the AC adapter 302 and the terminal connection portion 159 of the electronic loupe 1 becomes incomplete and the switching from AC adapter drive to battery drive occurs, since the DC plug appears to be connected to the electronic loupe 1 visually, it is difficult to notice that the power supply has been switched.

[0036] In contrast, in the electronic magnifier 1 of the present embodiment, when switching from AC adapter drive to battery drive, a screen 502 is displayed in which a mark 503 indicating the remaining battery level is superimposed on the image of the subject for a predetermined period (for example, 3 seconds) (step S107). Therefore, the user can know that the power supply has been switched from the AC adapter 302 to the battery 4 when the mark 503 is displayed. Further, the mark 503 becomes non-displayed after a predetermined period (for example, 3 seconds) has elapsed from the display start time. Therefore, it is possible to minimize the interference with the user's observation by information different from the image of the subject displayed to notify the user that the power supply has been switched, within a short time.

[0037] Similarly, in the electronic magnifier 1 of the present embodiment, while the battery is driving and the user is observing the image of the subject 2, only the image of the subject captured by the imaging unit 153 is displayed on the display unit 155 as shown in the left screen 501 of FIG. 7. Then, when switching from battery drive to AC adapter drive, a screen 504 is displayed in which a mark 505 indicating that the AC adapter is driving is superimposed on the image of the subject for a predetermined period (for example, 3 seconds) (step S105). Therefore, the user can know that the power supply has been switched from the battery 4 to the AC adapter 302 when the mark 505 is displayed. Therefore, for example, when the DC plug of the AC adapter 302 is reconnected after switching from AC adapter drive to battery drive, it is possible to easily confirm that the AC adapter drive has been restored. Further, the mark 505 becomes non-displayed after a predetermined period (for example, 3 seconds) has elapsed from the display start time. Therefore, also when switching from battery drive to AC adapter drive, it is possible to minimize the interference with the user's observation by information different from the image of the subject displayed to notify the user that the power supply has been switched, within a short time.

[0038] Note that the display positions, dimensions, and display forms of marks 503 and 505 are not limited to specific display positions, dimensions, and display forms. For example, mark 503 (505) may be displayed small at the upper left corner of screen 502 (504). Also, marks 503 and 505 may be character information indicating that the supply power has been switched, or a combination of such character information and graphics.

[0039] The above-described embodiments are examples shown to facilitate understanding of the invention, and the present invention is not limited to the above-described embodiments. Electronic devices including an electronic loupe and a display control method can be variously modified and changed without departing from the scope of the claims.

[0040] For example, the external power source 3 may be a portable power source sometimes called a mobile battery, which is connected to the electronic loupe 1 by a power supply-capable transmission cable such as a USB cable, or another electronic device capable of outputting direct current such as a personal computer. The battery 4 may be a disposable type primary battery or a secondary battery capable of being repeatedly charged and discharged. When the battery 4 is a secondary battery, the power source selection unit 157 may charge the battery 4 using part of the power supplied from the external power source 3. Further, although the case where the priority of the external power source 3 is higher than that of the battery 4 was exemplified in the above-described embodiment, the priority of the battery 4 may be higher than that of the external power source 3, or for example, the power source priority may change according to the power supplied from the external power source 3 and the remaining amount of power of the battery 4.

[0041] Also, for example, if the user performs a predetermined operation (e.g., an operation of pressing any one of buttons 121 to 124, 126 to 128) before a predetermined period elapses after the supply power source starts displaying the switching marks 503 (see FIG. 6) and 505 (see FIG. 7), the marks 503 and 505 may be made non-displayed before the predetermined period elapses. By doing so, a user who notices that the supply power source has switched before the predetermined period elapses can make the period during which information other than the subject image is displayed on the display unit 155 shorter. Also, when a predetermined operation by the user is performed, in the electronic loupe 1, it can be regarded that the user has confirmed that the supply power source has switched. In other words, if no predetermined operation is performed until the marks 503 and 505 are made non-displayed after the predetermined period has elapsed, there is a possibility that the user has not noticed that the supply power source has switched. Therefore, if no predetermined operation is performed until the marks 503 and 505 are made non-displayed, the marks 503 and 505, or information having a higher visual effect than the marks 503 and 505, may be displayed again for a predetermined period. Also, when displaying information indicating the remaining amount of power of the battery 4 when switching to battery drive, the mark may be displayed again for a predetermined period at the timing when the level (stage) indicating the remaining amount changes. For example, when the remaining amount of power of the battery 4 is divided into three stages as in the mark 503 of FIG. 6, the mark may be displayed each time the level drops by one stage.

[0042] In addition, the electronic device according to the present invention is not limited to, for example, an electronic device in which an imaging device and a display device 111 are arranged in a single housing (main body portion 101 in FIG. 1) such as the above-described electronic magnifier 1. The electronic device according to the present invention may be, for example, an electronic device sometimes called a digital microscope that transmits an image of a subject 2 captured by an imaging device separate from the main body portion 101 in which the display device 111 is arranged to the main body portion 101 by a transmission cable or wireless communication and displays it on the display device 111. Further, the electronic device according to the present invention such as the above-described electronic magnifier 1 may notify the user by displaying a mark on the screen and, for example, by sound using a sound emitting unit that emits an operation sound when the supply power is switched. Furthermore, the electronic device according to the present invention can be operated by two or more types of supply power sources and may include a desirable one (for example, an image display device) in which no other information is superimposed when observing an image displayed on the display device.

Explanation of Signs

[0043] 1... Electronic magnifier, 111... Display device, 153... Imaging unit, 155... Display unit, 157... Power supply selection unit, 161... Determination unit, 162... Display control unit, 2... Subject, 3... External power supply, 302... AC adapter, 4... Battery, 503, 505... Marks

Claims

1. An electronic device capable of switching between an operation using first power supplied from a first power source and an operation using second power supplied from a second power source, a display unit on which an image of a subject imaged by an imaging unit is displayed, when a supply power source that supplies power for operating the electronic device is switched, start displaying information indicating that the supply power source has been switched in an area where the image of the subject is displayed on the display unit, and then make the information non-displayed within a predetermined period, a display control unit; An electronic device comprising:

2. the second power source has a lower priority than the first power source, When both the operation using the first power and the operation using the second power are possible, perform the operation using the first power supplied from the first power source with a higher priority. The electronic device according to claim 1.

3. The first power source is an external power source, and the second power source is a battery mounted in the housing of the electronic device. The electronic device according to claim 1.

4. The first power is supplied from an AC power source via an AC adapter, and the second power is supplied from a battery mounted in the housing of the electronic device. The electronic device according to claim 1.

5. Further comprising a determination unit that determines whether the remaining amount of the second power is equal to or greater than a threshold value when the state changes from a state in which the first power is supplied to a state in which the first power is not supplied, When the determination unit determines that the remaining amount of the second power is equal to or greater than the threshold value, the display control unit starts displaying information indicating that the supply power source has been switched from the first power source to the second power source on the display unit, and then makes the information non-displayed within a predetermined period. The electronic device according to claim 3.

6. The display control unit As information indicating that the supply power source has switched from the first power source to the second power source, a mark including a figure imitating the second power source is displayed on the display unit. As information indicating that the supply power source has switched from the second power source to the first power source, a mark including a figure imitating the first power source is displayed on the display unit. The electronic device according to claim 1.

7. The electronic device further includes an input unit that receives an operation on the electronic device. When an operation on the input unit is performed before the elapse of the predetermined period from the time when the display control unit starts to display information indicating that the supply power source has switched on the display unit, the information is hidden even if the predetermined period has not elapsed. The electronic device according to claim 1.

8. The imaging unit, A control unit that enlarges an image within a predetermined region in the image of the subject captured by the imaging unit based on the size of the image display region on the display unit and displays the enlarged image on the display unit. The electronic device according to any one of claims 1 to 7, further comprising:

9. An electronic device capable of switching between an operation by first power supplied from a first power source and an operation by second power supplied from a second power source. When an image of a subject captured by an imaging unit is being displayed on a display unit and the supply power source that supplies power to operate the electronic device is switched, a process is executed in which information indicating that the supply power source has been switched is displayed in the region where the image of the subject is displayed on the display unit, and then the information is hidden within a predetermined period. A display control method for executing the above.

Images