Electronic device, its control method, program, and recording medium

Abstract

To more effectively lower the temperature of an electronic device according to circumstances.SOLUTION: An electronic device includes at least one or more temperature acquisition means for acquiring the temperature of equipment, display means, and control means for controlling the display means to display the arrangement position of the temperature acquisition means when the temperature acquired from the temperature acquisition means exceeds a predetermined threshold.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a method for acquiring and controlling the temperature of an electronic device. [Background technology]

[0002] In recent years, many imaging devices capable of recording video have become known. When recording video, heat is generated inside the imaging device, and measures to deal with this heat have become an important issue, both in terms of its impact on the user and in terms of protecting the device and image quality. To address this issue, some electronic devices are equipped with fans to dissipate the generated heat to the outside. Patent Document 1 discloses that when the temperature inside a digital camera reaches a predetermined temperature, an icon indicating a temperature rise is displayed, and if the temperature rises further, the fan begins to operate regardless of whether or not a user instructs it to do so. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-042172 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, if the temperature rise caused by the power consumption due to fan operation exceeds the cooling effect of the fan, the temperature rise may cause the digital camera to stop functioning even if the fan is operated. Also, when trying to cool the digital camera to resume the temporary suspension of the digital camera's functions due to a temperature rise, the user may not be able to recognize the appropriate area to be cooled, and the digital camera may not be cooled efficiently.

[0005] Therefore, the present invention makes it possible to more effectively reduce the temperature of an electronic device depending on the situation. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention Electronic devices are The electronic device has a plurality of temperature acquisition means for acquiring temperatures, the plurality of temperature acquisition means including a first temperature acquisition means close to the exterior of the electronic device and a second temperature acquisition means close to the center of the electronic device; a display means; a control means for controlling the display means to display an external view of the electronic device on the display means according to the position of the temperature acquisition means that exceeds the threshold when the temperature acquired by the temperature acquisition means exceeds the threshold, and to display a notification on the external view indicating the area of ​​the electronic device that needs to be cooled; and a cooling means for cooling the electronic device with a fan, wherein the control means controls the display means to execute a first cooling method that drives the cooling means when a difference between a first temperature acquired by the first temperature acquisition means and a second temperature acquired by the second temperature acquisition means is greater than a predetermined value, and to execute a second cooling method that turns off the power of the electronic device when the difference between the first temperature and the second temperature is equal to or less than a predetermined value. [Effects of the Invention]

[0007] According to the present invention, the temperature of an electronic device can be more effectively reduced depending on the situation. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an external view of a digital camera 100. [Figure 2] FIG. 1 is a block diagram showing the configuration of a digital camera 100. [Figure 3] FIG. 10 is a flowchart showing a control process for controlling the temperature of the digital camera. [Figure 4] 10 is a display example 1 of the temperature and internal state of the digital camera 100 over time. [Figure 5] 10 is a second display example of the temperature and internal state of the digital camera 100 over time. [Figure 6] 10 is a display example 3 of the temperature and internal state of the digital camera 100 over time. [Figure 7] 10 is a display example 1 showing recommended cooling locations of the digital camera 100. [Figure 8] 10 is a display example 2 showing recommended cooling locations of the digital camera 100. [Figure 9] 10A and 10B are diagrams showing the arrangement positions of the temperature sensor 93 of the digital camera 100 and the temperature state according to the arrangement positions. [Figure 10] 10 is a display example of options for cooling methods. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0010] 1(a) and 1(b) show external views of a digital camera 100 as an example of a device to which the present invention can be applied. FIG. 1(a) is a front perspective view of the digital camera 100, and FIG. 1(b) is a rear perspective view of the digital camera 100. In FIG. 1, a display unit 28 is provided on the rear of the camera and displays images and various information. A touch panel 70a is a touch-operable operating member and can detect touch operations on the display surface (operation surface) of the display unit 28. An outside-finder display unit 43 is provided on the top surface of the camera and displays various settings of the camera, including shutter speed and aperture.

[0011] The shutter button 61 is an operation unit for issuing shooting instructions. In still image shooting mode, it is used to issue instructions to prepare for shooting a still image and to issue a shooting instruction, and in video shooting mode, it is used to issue instructions to start and stop video shooting (recording). The mode selector switch 60 is an operation unit for switching between various modes. The terminal cover 40 is a cover that protects a connector (not shown) that connects the digital camera 100 to a connection cable for an external device. The main electronic dial 71 is a rotary operation unit included in the operation unit 70. By turning this main electronic dial 71, settings such as shutter speed and aperture can be changed. The power switch 72 is an operation unit for turning the power of the digital camera 100 on and off. The sub electronic dial 73 is a rotary operation unit included in the operation unit 70. It is used to move the selection frame and advance images. The cross key 74 is an operation unit included in the operation unit 70 with a push button that can be pressed in four directions, and operations can be performed depending on the direction the cross key 74 is pressed. The SET button 75 is included in the operation unit 70 and is a push button that is mainly used to confirm selections. The video button 77 is used to start and stop video shooting (recording). By pressing the shutter button 61 after pressing the AE lock button 78, you can shoot with the AF position fixed, or shoot even in situations where AF is not possible. The playback button 79 is included in the operation unit 70 and is an operation button for switching between shooting mode and playback mode. Pressing the playback button 79 in shooting mode switches to playback mode, and the most recent image recorded on the recording medium 200 can be displayed on the display unit 28. The assign button 95 is included in the operation unit 70 and is a button to which other functions can be assigned. In its initial state, it functions as a button for displaying a status screen, and other functions can be assigned, such as a function for changing settings or status related to video shooting and playback, or a function for starting video shooting (recording). The function for displaying a status screen can also be assigned to an assign button other than the assign button 95.

[0012] The status screen is a screen made up of multiple pages that displays the settings or status related to video recording and playback, the internal status of the digital camera, and the like.

[0013] The communication terminal 10 is a communication terminal through which the digital camera 100 communicates with a lens unit 150 (detachable), which will be described later. The eyepiece 16 is the eyepiece of an eyepiece finder (a peer-type finder), and the user can view an image displayed on an EVF (Electronic View Finder) 29 in the finder display unit through the eyepiece 16. The lid 202 is a lid for a slot that stores a recording medium 200 and a battery. The grip 90 is a holding section shaped to be easily held in the right hand when the user holds the digital camera 100. When the digital camera is held by gripping the grip 90 with the little finger, ring finger, and middle finger of the right hand, the shutter button 61 and main electronic dial 71 are positioned so that they can be operated with the index finger of the right hand. In the same state, the sub electronic dial 73 is positioned so that it can be operated with the thumb of the right hand.

[0014] The intake vent 98 and exhaust vent 99 are air passages for cooling the main body, and when the fan 92 in FIG. 2 rotates, air flows from the intake vent 98 to the exhaust vent 99, making it possible to release heat from the main body. The main body is also equipped with a temperature sensor 93, which can measure the temperature of a specific location on the main body. Depending on the measured temperature, the fan 92 is stopped or its rotation speed is changed. As will be described later, temperature status information is displayed on the screen based on the main body exterior / internal temperatures obtained from the temperature sensor 93. Note that there may be multiple temperature sensors 93 and fans 92.

[0015] FIG. 2 is a block diagram showing an example of the configuration of a digital camera 100 according to this embodiment. In FIG. 2, lens unit 150 is a lens unit equipped with an interchangeable photographic lens. Lens 103 is usually composed of multiple lenses, but here, for simplicity, only a single lens is shown. Communication terminal 6 is a communication terminal that enables lens unit 150 to communicate with digital camera 100. Lens unit 150 communicates with system control unit 50 via communication terminal 6 and the aforementioned communication terminal 10, and controls aperture 1 via aperture drive circuit 2 using an internal lens system control circuit 4. Thereafter, lens 103 is displaced via AF drive circuit 3 to adjust the focus.

[0016] The shutter 101 is a focal plane shutter that can freely control the exposure time of the imaging unit 22 under the control of the system control unit 50.

[0017] The imaging unit 22 is an imaging element that converts an optical image into an electrical signal and is composed of a CCD, CMOS element, etc. The A / D converter 23 is used to convert an analog signal output from the imaging unit 22 into a digital signal.

[0018] The image processing unit 24 performs predetermined pixel interpolation, resizing such as reduction, and color conversion processing on data from the A / D converter 23 or data from the memory control unit 15 (described later). The image processing unit 24 also performs predetermined arithmetic processing using the captured image data. The system control unit 50 performs exposure control and distance measurement control based on the arithmetic results obtained by the image processing unit 24. This results in TTL (through-the-lens) AF (autofocus) processing, AE (autoexposure) processing, and EF (flash pre-flash) processing. The image processing unit 24 also performs predetermined arithmetic processing using the captured image data, and performs TTL AWB (auto white balance) processing based on the arithmetic results obtained.

[0019] The memory control unit 15 controls data transmission and reception between the A / D converter 23, the image processing unit 24, and the memory 32. Output data from the A / D converter 23 is written to the memory 32 via the image processing unit 24 and the memory control unit 15, or directly via the memory control unit 15. The memory 32 stores image data obtained by the imaging unit 22 and converted into digital data by the A / D converter 23, as well as image data to be displayed on the display unit 28 and the EVF 29. The memory 32 has a storage capacity sufficient to store a predetermined number of still images and a predetermined period of moving images and audio.

[0020] The memory 32 also serves as a memory (video memory) for displaying images. The display image data written to the memory 32 is displayed on the display unit 28 and the EVF 29 via the memory control unit 15. The display unit 28 and the EVF 29 perform display on a display device such as an LCD or an organic EL display in accordance with a signal from the memory control unit 15. A live view display (LV display) can be performed by sequentially transferring and displaying data that has been A / D converted by the A / D converter 23 and stored in the memory 32 to the display unit 28 or the EVF 29. Hereinafter, an image displayed in live view will be referred to as a live view image (LV image).

[0021] Compression unit 26 generates moving image data by compressing the temporally continuous image data stored in memory 32 in a format such as MPEG. The generated moving image data is stored in memory 32 via memory control unit 15, and then multiplexed with audio also stored in memory 32 and written to recording medium 200 as a moving image file.

[0022] Various camera settings such as shutter speed and aperture are displayed on the outside viewfinder display 43 via an outside viewfinder display drive circuit 44 .

[0023] The nonvolatile memory 56 is an electrically erasable and recordable memory, such as an EEPROM. The nonvolatile memory 56 stores constants, programs, etc. for the operation of the system control unit 50. The programs referred to here are programs for executing various flowcharts described later in this embodiment.

[0024] The system control unit 50 is a control unit made up of at least one processor and / or at least one circuit, and controls the entire digital camera 100. By executing the programs recorded in the nonvolatile memory 56 described above, each process of this embodiment, which will be described later, is realized. The system memory 52, for example, is a RAM, and constants and variables for the operation of the system control unit 50, programs read from the nonvolatile memory 56, etc. are loaded into the system memory 52. ​​The system control unit 50 also performs display control by controlling the memory 32, D / A converter 19, display unit 28, etc.

[0025] The system timer 53 is a timekeeping unit that measures the time used for various controls and the time of a built-in clock.

[0026] The mode selector switch 60, first shutter switch 62, second shutter switch 64, and operation unit 70 are operating means for inputting various operational instructions to the system control unit 50. The mode selector switch 60 switches the operation mode of the system control unit 50 to one of still image recording mode, video shooting mode, playback mode, etc. Modes included in the still image recording mode include auto shooting mode, auto scene determination mode, manual mode, aperture priority mode (Av mode), shutter speed priority mode (Tv mode), and program AE mode. There are also various scene modes and custom modes that provide shooting settings for specific shooting scenes. The mode selector switch 60 allows the user to directly switch to one of these modes. Alternatively, the user may first switch to a list screen of shooting modes using the mode selector switch 60, then select one of the displayed modes and switch using other operation members. Similarly, the video shooting mode may also include multiple modes.

[0027] The first shutter switch 62 is turned on and generates a first shutter switch signal SW1 when the shutter button 61 provided on the digital camera 100 is pressed halfway (a shooting preparation command) during operation. The first shutter switch signal SW1 starts operations such as AF (autofocus) processing, AE (auto exposure) processing, AWB (auto white balance) processing, and EF (pre-flash) processing.

[0028] The second shutter switch 64 is turned on when the shutter button 61 is fully pressed (photographing instruction) and generates a second shutter switch signal SW2. The system control unit 50 starts a series of photographing processing operations, from reading out a signal from the imaging unit 22 to writing image data to the recording medium 200, in response to the second shutter switch signal SW2.

[0029] Each operating member of the operating unit 70 is assigned a function appropriate for each situation by selecting and operating various function icons displayed on the display unit 28, and acts as various function buttons. The function buttons include, for example, an end button, a back button, an image forward button, a jump button, a filter button, and an attribute change button. For example, when the menu button is pressed, a menu screen on the display unit 28 on which various settings can be made is displayed. The user can intuitively make various settings using the menu screen displayed on the display unit 28, the four directional buttons (up, down, left, and right), and the SET button.

[0030] The operation unit 70 is a variety of operation members that serve as an input unit for accepting operations from the user. The operation unit 70 includes push buttons, rotary dials, touch sensors, and the like, and at least the following operation units: the shutter button 61, the main electronic dial 71, the power switch 72, the sub electronic dial 73, the cross key 74, the SET button 75, the movie button 77, the AE lock button 78, the playback button 79, and the assign button 95.

[0031] The power supply control unit 80 is composed of a battery detection circuit, a DC-DC converter, a switch circuit for switching between powered blocks, etc., and detects whether a battery is installed, the battery type, and the remaining battery charge. The power supply control unit 80 also controls the DC-DC converter based on the detection results and instructions from the system control unit 50, and supplies the required voltage for the required period to each unit, including the recording medium 200. The power supply unit 30 is composed of primary batteries such as alkaline batteries or lithium batteries, secondary batteries such as NiCd batteries, NiMH batteries, or Li batteries, an AC adapter, etc.

[0032] The recording medium I / F 18 is an interface with a recording medium 200 such as a memory card or a hard disk. The recording medium 200 is a recording medium such as a memory card for recording captured images and video data, and is composed of a semiconductor memory, a magnetic disk, or the like.

[0033] The communication unit 54 is connected wirelessly or via a wired cable, and transmits and receives video signals and audio signals. The communication unit 54 can also be connected to a wireless LAN (Local Area Network) or the Internet. The communication unit 54 can also communicate with external devices via Bluetooth (registered trademark) or Bluetooth Low Energy. The communication unit 54 can transmit images (including LV images) captured by the imaging unit 22 and images recorded on the recording medium 200, and can also receive images and various other information from external devices.

[0034] The orientation detection unit 55 detects the orientation of the digital camera 100 with respect to the direction of gravity. Based on the orientation detected by the orientation detection unit 55, it is possible to determine whether an image captured by the imaging unit 22 was captured with the digital camera 100 held horizontally or vertically. The system control unit 50 can add orientation information corresponding to the orientation detected by the orientation detection unit 55 to the image file of the image captured by the imaging unit 22, or rotate and record the image. An acceleration sensor, a gyro sensor, or the like can be used as the orientation detection unit 55. The acceleration sensor or gyro sensor of the orientation detection unit 55 can also be used to detect movement of the digital camera 100 (panning, tilting, lifting, whether it is stationary, etc.).

[0035] The operation unit 70 includes a touch panel 70a capable of detecting contact with the display unit 28. The touch panel 70a and the display unit 28 can be configured as an integrated unit. For example, the touch panel 70a is configured so that its light transmittance does not interfere with the display of the display unit 28, and is attached to the upper layer of the display surface of the display unit 28. Input coordinates on the touch panel 70a correspond to display coordinates on the display screen of the display unit 28. This makes it possible to provide a GUI (Graphical User Interface) that allows the user to directly operate the screen displayed on the display unit 28. The system control unit 50 can detect the following operations or states on the touch panel 70a: A finger or pen that has not been touching the touch panel 70a touches the touch panel 70a again, that is, the start of touching (hereinafter referred to as touch-down). The touch panel 70a is in a state where it is touched with a finger or a pen (hereinafter referred to as Touch-On). Touching the touch panel 70a with a finger or a pen and moving it (hereinafter referred to as Touch-Move). The finger or pen that has been touching the touch panel 70a is released, that is, the touch ends (hereinafter referred to as "touch-up"). A state in which nothing is touching the touch panel 70a (hereinafter referred to as Touch-Off).

[0036] When touch down is detected, touch on is also detected at the same time. After touch down, touch on will usually continue to be detected unless touch up is detected. Touch move is also detected when touch on is detected. Even if touch on is detected, touch move will not be detected unless the touch position moves. Once it is detected that all fingers or pens that were touching have touched up, touch off occurs.

[0037] These operations and states, as well as the coordinates of the position where the finger or pen is touching the touch panel 70a, are notified to the system control unit 50 via the internal bus. The system control unit 50 determines what kind of touch operation was performed on the touch panel 70a based on the notified information. Regarding touch moves, the direction of movement of the finger or pen moving on the touch panel 70a can also be determined for each vertical and horizontal component on the touch panel 70a based on changes in the position coordinates. If a touch move of a predetermined distance or more is detected, it is determined that a slide operation has been performed. An operation in which a finger is touched on the touch panel, moved quickly for a certain distance, and then released is called a flick. In other words, a flick is an operation in which the finger is quickly traced across the touch panel 70a as if flicking it. If a touch move of a predetermined distance or more at a predetermined speed or more is detected and a touch up is then detected, it is determined that a flick has been performed (it can be determined that a flick occurred following a slide operation).

[0038] Furthermore, a touch operation in which multiple points (for example, two points) are touched simultaneously and the touch positions are brought closer together is called a pinch in, and a touch operation in which the touch positions are moved farther apart is called a pinch out. Pinch out and pinch in are collectively called a pinch operation (or simply pinch).

[0039] The touch panel 70a may be any of a variety of touch panel types, including resistive, capacitive, surface acoustic wave, infrared, electromagnetic induction, image recognition, and optical sensor types. Depending on the type, there are types that detect a touch by contact with the touch panel, and types that detect a touch by the approach of a finger or pen to the touch panel, but either type is acceptable.

[0040] Temperature sensors 93a to 93d are temperature sensors that measure the temperature on or inside the housing of the digital camera 100 and are temperature acquisition means included in the temperature sensor 93. FIG. 9 shows an example of the temperature thresholds (temperatures Kl and Kh, described below) at which the operation of the digital camera 100 is restricted for each temperature sensor, as well as the locations of the temperature sensors. FIG. 9(c) is a view of the digital camera 100 viewed from the display unit 28 side with the EVF 29 facing up. Temperature sensor 93a is a temperature sensor located near the image capture unit 22 and measures the temperature near the devices in the image capture unit 22. Temperature sensor 93b is a temperature sensor located around the connector protected by the terminal cover 40 and measures the temperature used to calculate the temperature of the housing surface of the digital camera 100. This prevents the housing surface from reaching a certain high temperature (a temperature lower than the device protection temperature, described below, specifically around 46°C) and causing the user to continue taking pictures while holding the grip unit 90 at that temperature, thereby preventing the user from suffering low-temperature burns. Temperature sensor 93c is a temperature sensor placed near the display unit 28, and measures the temperature near the display unit 28. Temperature sensor 93d is a temperature sensor placed inside the lid 202, and measures the temperature near the recording medium 200 and the battery. If each device becomes too hot (for example, 80°C or higher), the device may stop functioning properly or the image quality may deteriorate, so temperature measurement is performed to prevent these problems. In this embodiment, four temperature sensors are placed near the four devices, but the number and locations of the sensors are not limited to this.

[0041] 3(a) to 3(c) show that the internal state of the digital camera 100 and temperature changes are displayed on the display unit 28, and when the temperature rises, the operation of the digital camera 100 is restricted.

[0042] 3(a) is a flowchart of the control process that starts when the digital camera 100 is started (powered on) and in video recording mode while ready to shoot. This control process is realized by the system control unit 50 loading a program stored in the non-volatile memory 56 into the system memory 52 and executing it. The recording time may be obtained from the number of frames or time code included in the management information attached to the video file, or by analyzing the number of frames in the video file.

[0043] In S301, the system control unit 50 sets the variable n=1, which indicates the number of times temperature acquisition is started after the digital camera 100 is powered on and enters a shooting standby state, and stores this in the system memory 52. ​​The variable n is reset when the digital camera 100 is powered off or when the digital camera 100 transitions from a shooting mode process (control process for taking pictures) to another mode process.

[0044] In S302, the system control unit 50 acquires the temperature Kn at time Xn and the internal state of the camera. The internal state of the camera includes, for example, a shooting-related state such as a shooting standby state or a shooting state (shooting), Wi-Fi connecting to the Internet via the communication unit 54, and whether the fan 92 is running.

[0045] In S303, the system control unit 50 determines whether or not the temperature status display is enabled. If the temperature status display is enabled, the process proceeds to S304; if it is disabled, the process proceeds to S303. The temperature status is a display related to temperature changes in the digital camera 100. The user can freely set whether or not to display the temperature status, and when the temperature status display is enabled, a display indicating the temperature change is displayed on the display unit 28, allowing the user to check the details of the temperature change at any time desired. Even if the temperature status display is disabled, a display related to the temperature is displayed superimposed on the LV image. Although the amount of information is smaller than the details of the temperature change, the temperature change can be visually confirmed while checking the LV image.

[0046] In S304, the system control unit 50 displays the temperature status on the display unit 28. The control in this step will be described later with reference to the control flowchart in FIG.

[0047] In S305, the system control unit 50 displays a temperature item, which is a simple display of temperature changes, together with the LV image on the display unit 28. An example of what is displayed on the display unit 28 at this time is shown in FIG.

[0048] In S306, the system control unit 50 determines whether or not there is an instruction related to video shooting. If there is an instruction, the process proceeds to S307; if there is no instruction, the process proceeds to S308. Specifically, it is considered that an instruction has been given when the video button 77 is pressed while in video shooting standby mode, or when the video button 77 is pressed, a mode switching operation is performed, the playback button 79 is pressed, or the power switch 72 is operated while video shooting is in progress.

[0049] In S307, the system control unit 50 starts or stops video recording. If video recording has not been performed until this step (the camera was in the standby state), it starts video recording, creates a video file on the recording medium 200, and records the video captured by the imaging unit 22 with the current set contents. If video recording has been performed (the camera was in the video shooting state), it stops shooting according to the instruction and performs a close process (such as adding attribute information) on the video file created on the recording medium 200.

[0050] In S308, the system control unit 50 determines whether or not a predetermined time has elapsed. If it has elapsed, it proceeds to S311; otherwise, it proceeds to S309.

[0051] In S309, the system control unit 50 determines whether Kn > Kl. If Kn > Kl, it proceeds to S310; if Kn ≤ Kl, it proceeds to S312. When the internal temperature Kn of the digital camera 100 acquired in S302 becomes higher than a predetermined temperature Kl, there is a possibility of reaching a predetermined temperature Kh (Kl < Kh) at which operation is restricted by temperature. Therefore, control is performed to lower the temperature of the digital camera 100 (described later in FIG. 3(c)). The temperatures Kl and Kh will be described later in FIG. 4.

[0052] In S310, the system control unit 50 performs operation restriction processing of the digital camera 100 due to temperature. The operation restriction processing will be described later using FIG. 3(c).

[0053] In S311, the system control unit 50 sets the variable n to n + 1, saves it in the system memory 52, and returns to S302. In this embodiment, from S308Yes and S311, the predetermined time interval for recording the device temperature and device state is the same time, but it may be a different time interval according to the drive frequency of the temperature sensor 93, the operation frequency of the system control unit 50, etc.

[0054] In S312, the system control unit 50 determines whether or not the fan is being driven, which is caused by an increase in the internal temperature of the digital camera 100. If the fan is being driven, the process proceeds to S313, and if not, the process proceeds to S314.

[0055] In S313, the system control unit 50 stops the fan that was driven due to an increase in the internal temperature of the digital camera 100. Since the determination in S309 is No and the determination in S312 is Yes, it can be seen that the fan was driven because the internal temperature of the digital camera 100 became higher than the predetermined temperature Kh at which operation is restricted. However, because the current temperature of the digital camera 100 is equal to or lower than Kl, it is determined that the internal temperature of the digital camera 100 has sufficiently dropped, and the driving of the fan is stopped.

[0056] In S314, the system control unit 50 determines whether the processing has ended. If the processing has ended, the control flowchart in Fig. 3 ends; if not, the process returns to S306. End of processing refers to, for example, turning off the power to the digital camera 100 or transitioning to a mode other than the shooting mode processing.

[0057] Fig. 3(b) is a control flowchart that starts when S303 in Fig. 3(a) is Yes, i.e., when the temperature status display is enabled (S304 in Fig. 3(a)). The flowchart shown in Fig. 3(b) displays information related to temperature changes on the display unit 28. Examples of the display at this time are shown in Figs. 4 and 5.

[0058] In S321, the system control unit 50 plots the time Xn, the internal temperature Kn of the digital camera 100, and the internal state obtained in S302 of Fig. 3 on a graph and displays it on the display unit 28. An example of the display at this time is shown in Fig. 4. When the digital camera 100 is turned on and transitions to a shooting standby state, the temperature and time obtained first are K1 and X1, respectively. Fig. 4 shows a graph when n=11.

[0059] In S322, the system control unit 50 determines whether the variable n is greater than 1. If it is greater, the process proceeds to S323, and if not, the process proceeds to S324.

[0060] In S323, the system control unit 50 connects the data Xn-1 and Kn-1 obtained when the variable n is n-1 with the data Xn and Kn when the variable n is n, and displays them as a line graph. At this time, the internal state of the digital camera 100 is also displayed on the graph.

[0061] In S324, the system control unit 50 determines whether or not the fan 92 is operating. If the fan 92 is operating, the process proceeds to S325, and if not, the control flowchart of FIG.

[0062] In S325, the system control unit 50 displays display items related to fan driving on the plotted points (graph). An example of the display at this time is shown in Fig. 5(a).

[0063] In S326, the system control unit 50 determines whether the speed of the fan 92 has been selected. If so, the process proceeds to S327. If not, the process proceeds to S328. The selection of the fan 92 refers to, for example, the user touching a setting item 520a of a display item 520 in FIG. 5(a), which is displayed together with a graph on the display unit 28, or inputting an instruction using the cross key 74. When the user inputs an instruction using a touch operation or the SET button 75 for the setting item 520a, a setting item 521 is displayed. The setting item 521 is a candidate for the settable fan speed of the fan 92. When the user inputs an instruction using a touch operation or the cross key 74 for the setting item 520b or setting item 520c, the speed setting of the fan 92 is changed. In FIG. 5(a), the fan speed is set to low.

[0064] In S327, the system control unit 50 highlights the icon of the same speed as the currently selected speed of the fan 92. Specifically, in FIG. 5(a), the icon of the setting item 520a where the indicator 522 is displayed, that is, the icon at the time when the fan speed was set to low, is highlighted. The display format at this time is as shown in display items 501 to 504.

[0065] In S328, the system control unit 50 determines whether or not the user has touched an icon indicating the fan speed, which is displayed together with the graph. If so, the process proceeds to S329; if not, the control process flowchart of FIG. 3(b) is terminated and the process returns to S306 of FIG. 3(a). Specifically, if a touch operation (selection) has been performed on any of the display icons 501 to 511 of FIG. 5(c), the result is determined to be Yes, and the process proceeds to S329.

[0066] In S329, the system control unit 50 displays information. Since the determination in S328 is Yes, information about the internal state of the digital camera 100 at the time of the display item selected by the user is displayed. Specifically, in response to the user touching the display item 511 in FIG. 5(c), the display unit 28 displays the display item 541 and the selection item 542 superimposed on the graph.

[0067] In S330, the system control unit 50 determines whether or not a setting change instruction has been received. If an instruction has been received, the process proceeds to S331; if not, the control process flowchart of FIG. 3(b) is terminated and the process returns to S306 of FIG. 3(a). A selection item 542 is displayed along with the information displayed in S329, and if the user selects this, the fan speed and the internal state of the digital camera 100 as of time X11 can be changed all at once. This allows the user to predict future temperature increases / decreases while referring to the graph and change the settings.

[0068] In S331, the system control unit 50 changes the fan speed and the internal state of the digital camera 100.

[0069] Figure 3(c) is a control flowchart that starts when the answer in S309 of Figure 3(a) is Yes, that is, when the temperature status display is valid (S310 in Figure 3(a)). In the flowchart shown in Figure 3(c), operation restrictions and displays on the display unit 28 are performed when the temperature of the digital camera 100 reaches or exceeds a predetermined temperature. Display examples at this time are shown in Figures 7, 8, and 10.

[0070] In S341, the system control unit 50 determines whether the camera temperature Kn acquired in S302 of Figure 3(a) satisfies Kl < Kn ≤ Kh. If Kl < Kn ≤ Kh, the process proceeds to S342; otherwise, it proceeds to S347. Kl and Kh will be described later using Figure 4, and they are temperature thresholds for restricting the operation of the digital camera 100 or changing the temperature display.

[0071] In S342, the system control unit 50 determines whether video recording is currently in progress. If video recording is in progress, the process proceeds to S343; otherwise, it proceeds to S344.

[0072] In S343, the system control unit 50 determines whether there is an instruction from the user. If there is an instruction, the process proceeds to S344; otherwise, it proceeds to S347. At this time, the display instruction for the cooling location specifically refers to an instruction to the assign button 95.

[0073] In S344, the system control unit 50 displays the cooling location on the display unit 28. Display examples at this time are shown in Figures 7 and 8.

[0074] In S345, the system control unit 50 determines whether there is an instruction from the user. If there is an instruction, the process proceeds to S346; otherwise, it proceeds to S349. When there is an instruction from the user, the display of the cooling location displayed in S344 is turned off, and the display returns to the LV image or other displays of shooting information desired by the user.

[0075] [[ID=2In S346, the system control unit 50 hides the display of the cooling areas that was displayed in S344. It can be assumed that the user's instruction in S345 means that the user wants to return from the display of the cooling areas to the display of the LV image or other shooting information desired by the user.

[0076] In S347, the system control unit 50 determines whether or not a moving image is currently being recorded, similarly to S342. If recording is in progress, the process proceeds to S348, and if not, the process proceeds to S349.

[0077] In S348, the system control unit 50 stops video recording and performs a process to close the video file created on the recording medium 200 (such as adding attribute information). Since the determination in S310 of FIG. 3(a) is Yes and the determination in S341 of FIG. 3(c) is No, it can be seen that the camera temperature Kn is Kn>Kh. As will be described later with reference to FIG. 4, Kh is a high temperature that is likely to cause various malfunctions in any of the temperature sensors 93a-93d. Therefore, if the camera temperature Kn becomes higher than Kh, video recording is stopped even without a user instruction, thereby reducing degradation of image quality and malfunctions of components inside the digital camera 100.

[0078] In S349, the system control unit 50 calculates the temperature difference between the temperature T1 measured by the temperature sensor 93 located closest to the center of the digital camera 100 and the temperature T2 measured by the temperature sensor 93 located closest to the exterior of the digital camera 100. If the temperature difference T2 - T1 is greater than a predetermined value, the process proceeds to S351; if it is equal to or less than the predetermined value, the process proceeds to S350. If the determination in S349 is Yes, it is clear that there is a large difference between the temperature of the exterior (or outside air) and the temperature inside the digital camera 100. This makes it possible to cool the inside of the digital camera 100 more efficiently by driving the fan 92 at maximum speed without turning off the power of the digital camera 100, thereby drawing outside air into the digital camera 100. If the determination in S349 is Yes, the fan 92 is driven at maximum speed (described below in S352) without displaying options for cooling methods described below in S350. This is because it is considered that when the temperature difference T2-T1 is greater than a predetermined value, driving the fan 92 can cool the digital camera 100 more effectively and in a shorter time than turning off the power, but the present invention is not limited to this. In other words, even when the temperature difference T2-T1 is greater than a predetermined value, options for the cooling method, which will be described later, may be displayed in S350. Note that the predetermined value is considered to be a value of approximately 30 to 40°C, but is not limited to this as it depends on the size of the digital camera 100, etc.

[0079] On the other hand, if the determination in S349 is No, it can be seen that the temperature difference between the outside and inside of the digital camera 100 is not very large. For this reason, it is possible to cool the digital camera 100 more efficiently by turning off the power to the digital camera 100 and suppressing heat generation that would otherwise occur if the power were left on, rather than by driving the fan 92. Note that in this embodiment, the temperature T2 is the temperature measured by the temperature sensor 93b or 93d (or both) that is thought to be able to measure the exterior (outside air) temperature, and the temperature T1 is the temperature measured by the temperature sensor 93a.

[0080] In S350, the system control unit 50 displays options on the display unit 28. An example of the display at this time is shown in FIG. 10. Since the determination in S349 is No, the temperature difference T2-T1 is below a predetermined value, and therefore there is no significant difference in the degree to which the temperature of the digital camera 100 drops whether it is cooled by driving the fan 92 (described later in S352) or by turning the power off. However, if video recording is stopped and the digital camera 100 remains in standby mode, the temperature of the digital camera 100 will not drop easily, and it will not be possible to start recording the next video. Therefore, options such as those shown in FIG. 10 are displayed on the display unit 28 to allow the user to make a selection.

[0081] In S351, the system control unit 50 determines which option has been selected by the user. If fan rotation has been selected, the process proceeds to S352, and if power off has been selected, the process proceeds to S353.

[0082] In S352, the system control unit 50 starts driving the fan 92 at the maximum rotation speed, and then returns to S309 in FIG. 3A. The fan 92 that was driven in this step continues to drive until the temperature of the digital camera 100 falls below a predetermined threshold (Kn≦Kl). By controlling in this manner, the internal temperature of the digital camera 100 can be sufficiently reduced, and even if the user resumes video recording, the temperature will not immediately reach a temperature at which operation restrictions are imposed, allowing video recording to be performed for a longer period of time.

[0083] In S353, the system control unit 50 turns off the power to the digital camera 100, ends the process in FIG. 3(c), and also ends the control flowchart in FIG. 3(a).

[0084] FIG. 4 shows Example 1 of a graph displayed on the display unit 28 as a temperature status display. This graph plots the temperature and internal state of the digital camera 100 at each time. The horizontal axis represents time (Xn), and the vertical axis represents temperature (Kn). The point in time when the digital camera 100 is turned on is designated X0. In other words, the graph is reset each time the user turns off the digital camera 100. As described in the control flowchart of FIG. 3(a), the variable n is incremented after a predetermined time has elapsed or in response to changes in the internal state of the digital camera 100. Dotted line 404 represents temperature Kh, and dotted line 406 represents temperature Kl. Temperatures Kh and Kl are temperature thresholds used to prevent breakdowns in the devices constituting the digital camera 100, prevent degradation in the quality of captured video, and ensure the safety of the user holding the digital camera 100. As can be seen from the graph in FIG. 4, temperatures Kh and Kl have a relationship of Kh > Kl. By providing two thresholds, increases / decreases in the temperature of the digital camera 100 are recognized in stages and the user is notified. The temperatures Kl and Kh are guide temperatures to prevent the actual operating temperature limit from being reached as much as possible, and may be temperatures at which the device actually breaks down or the image quality of the video is degraded, or may be temperatures lower than these, or may have a certain width. The dotted line 406 may also be displayed as a band with a certain width.

[0085] The temperatures K1 to K4 at times X1 to X4 are lower than Kl (Kn < Kl). Also, at times X1 to X3, the internal state of the digital camera 100 is in the recording standby state. When video recording starts at time X3, it is in the middle of video recording, and at time X4, the internal state of the digital camera 100 is in the middle of recording. The internal state of the digital camera 100 is displayed at the lower part (region 410) of the graph of the temperature status display. Specifically, it is made possible to know the internal state by a strip-like display like the state display 402. In the video recording standby state, "STBY" is displayed, and in the middle of recording, "REC" is displayed. Also, at times X1 to X4, video recording starts at time X3, and after time X3, the internal state of the digital camera 100 is in the recording state (denoted as "REC" in the graph). When the video recording starts at time X3, the power consumption of devices such as the imaging unit 22 and the image processing unit 24 increases due to their driving, and the rate of change of the internal temperature of the digital camera 100 becomes large.

[0086] The temperatures K5 to K8 at times X5 to X8 are between Kl and Kh (Kl ≦ Kn ≦ Kh). Also, the internal state of the digital camera 100 is in the middle of video recording (REC). Since the user turns on Wifi at time X6, a display of "Wi-fi On" is made at the lower part of the graph as shown in the state display 403 of FIG. 4.

[0087] The temperatures K9-K10 at times X9-X10 are higher than Kh (Kn>Kh). When the temperature becomes higher than Kh, that is, at time X9, if video recording is in progress, the video recording stops and the digital camera 100 transitions to a recording standby state. Therefore, the display of the internal state of the digital camera 100 also changes, as shown in FIG. 4. In FIG. 4, the digital camera 100's operation is restricted so that video recording stops and the digital camera 100 transitions to a standby state because the temperature Kn becomes higher than Kh during video recording, but this is not limited to this. If the temperature Kn becomes higher than Kh in the recording standby state, the Wi-Fi and the digital camera 100 are turned off, and the fan 92 starts operating. At time X10, the temperature K10 has been higher than the temperature Kh since time X9, so the fan 92 is driven. The Wi-Fi is also turned off. The disappearance of the bar-shaped display of the status display 403 indicates that the Wi-Fi has been turned off. If the temperature remains higher than the temperature Kh for a long period of time, it will have an adverse effect on the devices of the digital camera 100, increasing the likelihood of it breaking down. Therefore, in addition to the control that stops video recording at time X9, the fan 92 is driven to lower the temperature of the digital camera 100. The driving state of the fan 92 at this time is shown in the status display 405 (FAN). Since the status display 405 is not displayed until time X10, the fan 92 is not driven until time X10. As mentioned above, Kh is the temperature at which operational restrictions are initiated to prevent breakdowns in the digital camera 100, and therefore the operation of the digital camera 100 is restricted when the temperature rises above the threshold, even if there is no user operation.

[0088] Temperature K11 at time X11 is equal to or higher than Kl and equal to or lower than Kh (Kl≦Kn≦Kh). It can be seen that driving the fan 92 at time X10 caused temperature K11 to drop to or below Kh. In this way, the user can visually check both the temperature and internal state of the digital camera 100. This allows the user to predict how much the temperature of the digital camera 100 will drop and whether video recording will be able to resume by restricting operation or driving the fan 92.

[0089] Other device conditions that affect device temperature may also be recorded. For example, recording formats such as file formats and codecs, or video recording settings such as recording resolution and frame rate may be recorded. The lighting status of display means included in the display unit 28 or the extra-viewfinder display unit 43, or the lighting brightness indicating the brightness when the display means is lit, may also be recorded. Communication status of external input / output terminals included in the recording medium I / F 18 may also be recorded. External device attachment status such as lenses like the lens unit 150, tripods, various terminals, handles, strobes, lighting, rigs, mudguards, filters, and housing may also be recorded, as well as the insertion / removal status of recording media like the recording medium 200. Power-saving modes with different power consumption or high-performance modes that increase power consumption to improve performance may also be recorded. A cooling mode that prioritizes cooling device temperature over normal operation may also be recorded. Sensor drive modes with different sensor update cycles or pixel signal readout methods, such as those of the imaging unit 22 and A / D 23, may also be recorded. Power supply status, such as battery, AC power, or USB power, included in the power supply unit 30 may also be recorded. The weather and temperature of the current location can be obtained through external communication via the temperature sensor 93 or the communication unit 54, or the surrounding environmental conditions can be estimated from the aperture value of the lens unit 150, the shutter speed of the shutter 101, the sensitivity of the imaging unit 22, and the exposure value Ev obtained from the imaging results.

[0090] As such, from the temperature status display (graph) shown in FIG. 4, the user can see that the slope of the line graph gradually increases upward from time X3, and that the slope becomes even steeper from time X6. From the slope of the graph and the internal state information of the digital camera 100, it can be seen that video recording started at time X3 and Wi-Fi was turned on at time X6. In other words, the user can visually confirm that the internal temperature of the digital camera 100 rises significantly when wireless communication via Wi-Fi starts. Although the rate of increase is smaller than when wireless communication via Wi-Fi starts, it can be seen that the internal temperature also rises when video recording starts. In contrast, the slope of the graph changes downward from time X9, and the downward slope becomes even steeper from time X10. From these facts, it can be seen that the internal temperature drops when video recording is stopped, and that driving the fan 92 can further promote the temperature drop.

[0091] By displaying the temperature status as shown in FIG. 4, the user can visually see how the temperature rises when the internal state of the digital camera 100 is changed. Furthermore, not only the video recording state but also changes in the state of wired and wireless communication and the fan drive state (cooling state) are displayed together with the temperature status. This allows the user to visually see how much each function contributes to the rise / fall in the internal temperature of the digital camera 100. Furthermore, even if the temperature exceeds a predetermined threshold and video recording becomes impossible, the user can see which function should be set to what state in order to more effectively cool the digital camera 100. It is also possible to predict how long the digital camera 100 should be left alone until it cools down enough to resume video recording, allowing for more efficient video recording without wasting time.

[0092] That is, according to display example 1 of the temperature status display of this embodiment, by recording and displaying the internal temperature and internal state of digital camera 100 at each time, the user can visually identify the internal state that causes temperature changes. Furthermore, the user can predict and imagine what measures should be taken to prevent the temperature from rising or to efficiently lower the temperature if it does rise. In other words, the user can be assisted in selecting measures to control the temperature.

[0093] While the internal status of the digital camera 100 that may be displayed together with the temperature status display includes the video recording status, communication status, and fan operation status (cooling status), the display is not limited to these. For example, it is possible to display the external connection status with an external display device (such as HDMI (registered trademark)) via wired or wireless communication, and the power saving status related to the power consumption of the digital camera 100, such as the auto power off setting. It is also possible to display the recording media status, which is the status of the specifications (communication speed, capacity, etc.) of the recording medium 200, and the display status related to whether the LV images to be displayed on the display unit 28 are high-quality images such as 4K or 8K. The operation status of the imaging unit 22, i.e., whether or not imaging is performed using the imaging unit 22, can also be displayed together with the temperature status display on the display unit 28.

[0094] 5(a) to 5(c) are display example 2 of the temperature status display (graph) displayed on display unit 28. The vertical and horizontal axes of the graph, times X1 to X11, and temperatures K1 to K11 are the same as those in FIG. 4. In FIG. 5, we consider a case where fan 92 is driven at all times from X1 to X11. FIG. 5(a) shows the display at S325 and S327 in FIG. 3(b), and FIG. 5(c) shows the display at S329 in FIG. 3(b).

[0095] Unlike the temperature status display graph of FIG. 4, the display items 500 of FIG. 5(a) display items 501-511 indicating the fan speed setting status at each time and a fan speed setting item 520. The display items 501-511 of the display items 500 refer to internal state information of the digital camera 100 stored in the memory 32. The setting item 520 shown in FIG. 5(a) indicates the available options and the current setting for the speed setting of the fan 92, and is displayed in response to a user selection (e.g., touch-on). When not selected by the user (FIG. 5(c)), the setting items 520b and 520c, which are options for the speed setting of the fan 92, and the indicator 522 are not displayed. In other words, when the user selects (touch-on) the setting item 520a, the setting items 520b and 520c are displayed. When the user selects one of the setting items 520a-520c, the indicator 522 is displayed for the selected setting item, and the speed setting of the fan 92 is changed. When the user instructs indicator 522 to move to setting item 520b ("Medium"), display items 505 to 509 are highlighted. Similarly, when indicator 522 moves to setting item 520c ("High"), display items 510 and 511 are highlighted. When the user performs a confirmation process (by touching the cursor again or pressing the SET button 75) at the fan speed where the cursor is displayed, the fan speed can be changed and confirmed. By displaying the fan speed in this manner, the user can visually see how much the internal temperature of the digital camera 100 will change when the fan speed is changed. Furthermore, the fan speed can be changed without opening the setting menu screen, which reduces the number of steps required.

[0096] Display item 530 in FIG. 5(b) is a table showing plot data information constituting display item 500 shown in FIG. 5(a). This table is updated each time a temperature or fan speed setting is acquired and stored in memory 32. The temperature in display item 530 is acquired from temperature sensor 93, and the fan described in display item 530 is information acquired from the setting state of fan 92 stored in nonvolatile memory 56. When the setting state of fan 92 is changed by the user from the setting menu screen, it is stored in nonvolatile memory 56 and the setting is retained the next time the device is started. Display items 501 to 504 indicate that the fan speed setting is low, display items 505 to 509 indicate that the fan speed setting is medium, and display items 510 to 511 indicate that the fan speed setting is high. Furthermore, the time in display item 530 indicates the time when the internal temperature of digital camera 100 or the fan speed setting was acquired via temperature sensor 93.

[0097] In this embodiment, the number of plot data items shown in the display item 500 is set to 10, and the display item 530 is used as an example where information is updated every 10 minutes, but this is not limiting. Data is plotted in the display item 500 every 10 minutes, but this is not limited to 10 minutes, and data may also be plotted not only over time, but also when the temperature Kn becomes equal to or lower than the temperature Kl.Kh, or when the internal state of the digital camera 100 changes.

[0098] When the user selects setting item 520a (when indicator 522 is displayed for setting item 520a), the corresponding fan speed display items 501-504 are highlighted. In this embodiment, the display items are highlighted to make them easier for the user to see. When the user changes the fan speed setting to medium (setting item 520b), display items 505-509 are highlighted. Similarly, when the user changes the fan speed setting to high (setting item 520c), display items 510 and 511 are highlighted.

[0099] 5(c) shows an example of display on the display unit 28 when one of the display items 501 to 511 displayed in the display item 500 is selected by the user. In response to the user selecting (touching) the display item 511, the display item 541 is displayed superimposed on the display item 500. The display item 541 indicates the speed setting of the fan 92 and the internal state of the digital camera 100 at the time X11 indicated by the display item 511 selected by the user. When the selection item 542 is selected, the settings can be changed all at once to the state indicated by the display item 541.

[0100] In this embodiment, the speed setting of the fan 92 can be set to high, medium, or low, but it may also be provided with a setting (e.g., auto) that automatically changes the speed setting of the fan 92 depending on the internal temperature of the digital camera 100.

[0101] In this embodiment, the relationship between temperature and time is displayed as a line graph, but this is not limited to this. Furthermore, when a touch is detected on the touch panel included in the operation unit 70 around each of the indicators 321 or the display items 501 to 511, detailed information may be displayed, allowing the user to directly change the fan setting at the touched point, as in the case of the display item 540. For example, when the fan speed setting status 511 is touched in the display item 540, the fan setting may be displayed as in the display item 541, and the setting may be changed by touching the selection item 542. When the selection item 542 is pressed in the display item 540, the fan speed displayed in the lower right corner of the screen of the display item 540 changes from "low" to "high." By directly setting the setting in this way, the user can easily confirm the appropriate setting and apply it. The display item 541 is not limited to a pop-up display as shown in FIG. 5(c). It may also be displayed above the setting item 520, i.e., below the graph.

[0102] As described using FIG. 5, by performing the display as in Display Example 2 for the temperature status display, the user can visually recognize whether the fan 92 is driven or not at each time of the graph, and not only the fan 92 but also the internal state of the digital camera 100. Even if the user does not remember the set parameters at each time, the set content at each time can be recognized, and how the set parameters and the internal state of the digital camera 100 affect the change in the internal temperature can also be recognized. Furthermore, since the set parameters can be changed while referring to the graph, changes that can more efficiently change (lower) the internal temperature of the digital camera 100 can be made without feeling bothered.

[0103] FIGS. 6(a) to (c) are Display Example 3 of the temperature status display to be displayed on the display unit 28. In FIGS. 6(a) to (c) which are Display Example 3, display items indicating the current temperature and the temperature change condition, which are temperature status displays, are shown superimposed on the LV image to be displayed on the display unit 28.

[0104] FIG. 6(a) shows a display example of the current temperature and the temperature change condition of the digital camera 100. Based on the temperatures Kl and Kh (Kl < Kh) described above using FIG. 4, it is determined whether they are lower or higher than those temperatures, and the current temperature is displayed as a temperature icon. For example, when the temperature Kn measured at the time of S302 is Kn < Kl, the display is as shown in display item 601, when Kl ≤ Kn < Kh, the display is as shown in display item 602, and when Kn ≥ Kh, the display is as shown in display item 603. That is, display item 601 displays the temperature sensor icon in white and changes the color of the temperature sensor icon as the temperature rises, display item 602 is light red, and display item 603 displays the temperature sensor icon in red. Thereby, the user can visually recognize that the temperature is rising / falling by the change in the display form of the display item (temperature sensor icon). In particular, regarding the temperature rise, by expressing in red that it is approaching the temperature that affects the driving of the digital camera 100, a warning is shown to the user.

[0105] Regarding the degree of temperature change, the degree of change is indicated by display items 604 to 608 as temperature change icons. When the temperature is rising rapidly, display item 604 is displayed on display unit 28, and when the temperature is rising slowly, display item 605 is displayed. When the temperature change is weak or there is no change, display item 606 is displayed, when the temperature is decreasing slowly, display item 607 is displayed, and when the temperature is decreasing rapidly, the display is performed as in display item 608.

[0106] FIG. 6(b) shows an example of the display of temperature information to be superimposed on the LV image. The temperature information is composed of a temperature icon (any one of display items 601 to 603) determined from the temperature Kn at time Xn and a temperature change icon (display items 604 to 608) determined from the temperatures at times Xn-2, Xn-1, and Xn. When there are no times Xn-2 and Xn-1, only the temperature change icon at the temperature at time Xn is displayed.

[0107] Examples of the case where the temperature of digital camera 100 is rising are shown in display items 611 and 612. Display item 611 is composed of display item 601 indicating the current temperature and display items 606, 605, and 606 indicating the degree of temperature change. From display item 601, the user can see that the temperature of digital camera 100 at the current time is Kn < Kl, and it is sufficiently low for temperatures that may affect camera malfunctions or the like. Also, from display items 606, 605, and 606, it can be seen that although the temperature of digital camera 100 is rising, the degree of change (change rate) is not very large. Therefore, it can be seen that there is a low possibility of reaching a temperature at which operation is restricted in a short time even if the processing being performed in the current state of digital camera 100 is continued.

[0108] The display item 612 is composed of a display item 601 indicating the current temperature, and display items 604, 605, and 604 indicating the degree of temperature change. From the display item 601, the user can see that the temperature of the digital camera 100 at the current time is Kn < Kl, and it is sufficiently low for temperatures that may affect the camera's failure or the like. Also, from the display items 604, 605, and 604, it can be seen that the temperature of the digital camera 100 at the current time is low, but if the processing being performed in the current state of the digital camera 100 is continued, there is a high possibility of reaching a temperature at which operation will be restricted in a short time.

[0109] The display items 613 and 614 show an example when the user is cooling an overheated device. The display item 613 is composed of a display item 603 indicating the current temperature, and display items 607, 608, and 607 indicating the degree of temperature increase (decrease). From the display item 603, the user can see that the temperature of the digital camera 100 at the current time is Kn > Kh, and it has reached / almost reached a temperature that may affect the camera's failure or the like and is thus very high. Also, from the display items 607, 608, and 607, it can be seen that the temperature of the digital camera 100 is decreasing, and the rate of decrease (cooling rate) is also large. Therefore, the user can imagine that if the cooling is continued in the current state of the digital camera 100, the temperature of the digital camera 100 will become low in a short time and video recording can be resumed.

[0110] Display item 614 is composed of display item 603, which shows the current temperature, and display items 606, 607, and 606, which show the rate of temperature rise (decrease). From display item 603, the user can see that the current temperature of digital camera 100 is Kn>Kh, and that it is so high that it has reached or is likely to reach a temperature that could cause the camera to malfunction. Furthermore, from display items 606, 607, and 606, the user can see that the temperature of digital camera 100 is on a downward trend, but that the rate of decline (cooling rate) is not that great. Therefore, the user can imagine that even if cooling continues in the current state of digital camera 100, it will take some time for the temperature of digital camera 100 to become low enough to resume video recording.

[0111] FIG. 6(c) shows an example in which the temperature information described with reference to FIGS. 6(a) and 6(b) is superimposed on the LV image. Display item 622 is displayed superimposed on LV 621 displayed on display unit 28. The user can check the temperature information of digital camera 100 while checking the LV image, whether video recording is in progress or in standby mode. This allows the user to decide whether to continue video recording or to interrupt video recording and allow digital camera 100 to cool. If cooling digital camera 100, the user can consider whether to increase the cooling rate beyond the current setting. Furthermore, because the user can visually check the temperature change over time, the user can adjust subsequent video recording schedules and plans.

[0112] In this embodiment, the temperature is displayed using an icon, but it may also be displayed using a gauge showing the current temperature relative to the upper limit temperature, or information may be communicated by changing the color of light emitted by the tally light included in the display unit 28. In addition to using arrows as temperature change icons, temperature changes may also be communicated by switching the blinking interval of the tally light included in the display unit 28. In this embodiment, the temperature difference per unit time is calculated, but the time interval for calculating the temperature difference may also be changed. In this case, the number of temperature change icons to be arranged may be three as in this embodiment, or the number may be increased or decreased.

[0113] In this embodiment, the LV621 and temperature information are displayed on the display unit 28, but they may also be displayed on the extra-viewfinder display unit 43 or the EVF 29, or the temperature information may be notified to the user by changing the blinking color and blinking interval of the tally light included in the display unit 28. Furthermore, when connecting to the system control unit 50 from a terminal such as a PC or smartphone via the communication unit 54, the temperature information may be sent to the terminal and notified to the user. Furthermore, in this embodiment, both a temperature icon and a temperature change icon are notified to the user as temperature information, but it is also possible to notify only the temperature change icon.

[0114] 6, the temperature status display example 3 allows the user to visually confirm the change in the internal temperature of digital camera 100 over time while checking the LV image. This makes it easy for the user to check the temperature change while checking the composition, etc., without feeling bothered during recording or while preparing to record.

[0115] As shown in the display control described with reference to FIGS. 3(a) and 3(b) and 4 to 6, the change in the internal temperature over time and the internal state of the digital camera 100 are displayed as graphs / icons, allowing the user to visually recognize the difference between the temperature at which operation is restricted and the current temperature. Furthermore, the temperature status display allows the user to predict what next steps should be taken to prevent the temperature from rising or to lower (cool) the temperature. Furthermore, when the temperature reaches a temperature at which video recording is restricted, the graph allows the user to predict how much cooling time will be required before the temperature drops to a level at which video recording can be resumed, and thus allows for rough estimates of video shooting plans / schedules.

[0116] 3(a)(b) and 4 to 6 is not limited to being displayed on the display unit 28 as described above, but may also be displayed on the EVF 29 or the outside viewfinder display unit 43. It is also possible to display it on an external output device such as an HDMI via wired or wireless communication.

[0117] 7 and 8 are examples of what is displayed on the display unit 28 when a user gives an instruction (when the assign button 95 is pressed in this embodiment) while a video is being recorded or when the video is being recorded. These are examples of what is displayed in S344 of FIG. 3(c). FIG. 7 shows display example 1, and FIG. 8 shows display example 2. FIG. 9 shows the temperature thresholds of each of the temperature sensors 93 and their locations.

[0118] The user is notified of the location closest to the temperature at which operation is restricted, based on the temperatures at multiple locations obtained from the temperature sensor 93. In order to enable video recording for a longer period of time without operation restrictions being imposed, the system explicitly indicates which part of the digital camera 100 should be cooled (recommended cooling location).

[0119] 7A shows an example in which recommended cooling locations are displayed on the housing of the digital camera 100 to notify the user of which locations should be cooled. Images 701 and 702 show external views of the digital camera 100.

[0120] Areas 703 to 707 indicate the locations of the temperature sensors 93 arranged inside the digital camera 100. The number of displayed areas corresponds to the number of temperature sensors 93 arranged. Note that multiple temperature sensors may be associated with one area, and multiple areas may be displayed for one temperature sensor. The temperature displayed in each area is determined by the system control unit 50 detecting the temperature measured by the temperature sensor 93 at regular intervals or the temperature measured when the assign button 95 is pressed.

[0121] Display items 708 to 711 indicate areas where cooling is recommended. Display item 708 indicates areas 703, display item 709 indicates areas 705, display item 710 indicates areas 706, and display item 711 indicates areas 707 for cooling. Note that it is sufficient to indicate where in digital camera 100 the areas where cooling is recommended are located, so the display is not limited to that shown in Fig. 7(a) and may be indicated by, for example, blinking the area indicating the location.

[0122] The system control unit 50 compares the temperature measured by the temperature sensor 93 corresponding to the location of the digital camera 100 with the threshold value corresponding to that location, and indicates the location where cooling is recommended if the temperature exceeds the threshold value. If there are multiple threshold values, the system control unit 50 indicates the location where cooling is recommended if any one or more of the threshold values ​​are exceeded. In this case, the system control unit 50 may use a fixed value such as a value stored in the system memory 52 as the threshold value for display, or may use a dynamic value such as a value calculated using a formula based on the state of the digital camera 100.

[0123] Area 712 indicates the intake vent 98 of fan 92, area 713 indicates the exhaust vent 99 of fan 92, and display items 714, 714 indicate the location of fan 92. At this time, the display is made so that the user can visually recognize that display item 714 is the intake vent and display item 714 is the exhaust vent. Areas 712, 713 and display items 714, 714 indicating the location of fan 92 are particularly effective displays for lowering the internal temperature of digital camera 100. When fan 92 is in use, cooling the area around intake vent 98 of fan 92 makes it possible to send cooled air into the interior of digital camera 100. This allows the interior of digital camera 100 to be cooled more efficiently. On the other hand, even if the area around exhaust vent 99 of fan 92 is cooled, air is simply expelled from the exhaust vent, and therefore the interior of digital camera 100 cannot be efficiently cooled using fan 92. That is, by displaying areas 712 and 713 and display items 714 and 714 superimposed on images 701 and 702 showing the external view of the digital camera 100, the user can use the fan 92 to cool the inside of the digital camera 100 more efficiently.

[0124] 7(b), a bar graph showing the temperature changes at the multiple temperature sensors 93 may be displayed along with an external view of the digital camera 100. Specifically, along with the recommended cooling locations described in FIG. 7(a), the display unit 28 displays each location on the digital camera 100 corresponding to areas 703 to 707 (the location of the temperature sensors 93) and a history of the difference between the threshold value and the measured temperature at each location.

[0125] Images 701 and 702 of digital camera 100 are reduced versions of images 701 and 702 in Figure 7(a). Graph 723 is a bar graph showing the difference between the threshold for restricting operation and the temperature measured by each temperature sensor 93 for each location of temperature sensors 93 arranged on digital camera 100. The X-axis represents each location on digital camera 100 corresponding to a temperature sensor 93, and the Y-axis represents the difference between the threshold for each location and the temperature measured by the corresponding temperature sensor 93. Note that, as long as it is possible to represent the current and past data on the temperature state at each location, it is possible to change the values ​​used on the X-axis and Y-axis, or to use a representation other than a bar graph for graph 723, such as a line graph or a representation of only numerical values.

[0126] The X-axis display item 724 represents the location corresponding to the temperature sensor 93 of the digital camera 100 .

[0127] Graphs 725, 716, and 717 represent the most recent, the second-to-last, and the second-to-last temperature measurement results measured by the temperature sensor 93 at each location. Only the most recent measurement result may be displayed. Any number of past measurement results may be displayed. The measurement results are selected by the system control unit 50 from the memory 32 for each location as temperatures measured by the temperature sensor 93 at regular intervals or as temperatures measured when the assign button 95 is pressed. The "regular interval" may be a fixed value stored in the system memory 52 or a value set by the user. When displaying the measurement results, the system control unit 50 may compare the temperature measured by the corresponding temperature sensor 93 at each location on the digital camera 100 with the corresponding threshold value stored in the system memory 52 and change the color of the bar graph, etc., depending on the comparison result.

[0128] Display items 718 to 720 on the Y-axis represent temperature thresholds corresponding to each location on the digital camera 100. Display item 718 on the Y-axis represents a temperature that is low enough for using the digital camera 100. Display item 719 on the Y-axis represents a temperature approaching a temperature threshold that imposes operational restrictions, which will be described later. Display item 720 on the Y-axis represents a temperature at which the digital camera 100 is forcibly shut down (temperature at which operational restrictions are imposed) to prevent malfunction of the digital camera 100. It is not necessary to display all thresholds corresponding to each location; for example, it is possible to display only display item 720 on the Y-axis that represents the temperature at which a forced shutdown occurs, or to display only the Y-axis elements that represent thresholds indicating locations where cooling is recommended, as determined by the system control unit 50.

[0129] Area 721 is made up of display items 724 and graphs corresponding to each temperature sensor 93 among display items 724, and their surroundings. When an area within area 721 displayed on display unit 28 is touched, system control unit 50 may perform a display such as blinking area 707, which indicates the location of digital camera 100 corresponding to display item 724 on the X axis of images 701 and 702. When an area within area 721 is touched by the user, the location of display item 724 on the X axis corresponding to area 721 is determined, and the area of ​​images 701 and 702 corresponding to the touched element is highlighted.

[0130] 7(c) and 7(d) are examples in which the recommended cooling method is displayed in addition to the external view of the digital camera 100 in FIG. 7(a).

[0131] Message 732 informs the user of a more efficient cooling method for area 731, and message 734 informs the user of a more efficient cooling method for area 733. These messages change depending on which of the temperature sensors 93a to 93d has exceeded its temperature threshold. Specifically, as shown in FIG. 9(a), the area displayed on the display unit 28 changes depending on which of the temperature sensors 93a to 93d has reached its temperature state (temperature states 1 to 3), and a corresponding message such as that shown in FIG. 9(b) is displayed. Messages 732 and 734 may be displayed in response to a user selecting an area display such as area 731 or 733, or may be displayed only for areas where the temperature acquired by the temperature sensor 93 exceeds the temperature threshold that imposes operational limitations. If multiple temperature sensors exceed their thresholds, multiple messages may be displayed. Instead of displaying messages, the area display may flash or be highlighted.

[0132] The images 701 and 702 described in FIGS. 7(a) to 7(d) may be external views of the digital camera 100 or illustrations of the digital camera 100. Any number of images 701 and 702 may be displayed depending on the location and number of recommended cooling areas to be displayed. In this embodiment, the recommended cooling areas are superimposed on the LV image, with a transparency that allows the user to visually recognize the LV image. This indicates that the recommended cooling areas are only displayed temporarily, and the user can easily check the LV image if desired. Information such as the video recording status (STBY, REC, etc.) and video recording time is important information related to video recording, even when the recommended cooling areas are displayed. Therefore, the information is visible without any user operation. This allows the user to view other information, such as the recommended cooling areas, while visually viewing the minimum information related to video recording.

[0133] Each area display is assigned multiple thresholds. The number of thresholds may be one. A threshold is assigned to each area display. The system control unit 50 acquires the threshold corresponding to the area display to be compared and compares it with the temperature measured by the temperature sensor 93 corresponding to the area display. Depending on the comparison result, the system control unit 50 displays or hides the area display, changes its color, or changes the type of associated icon. Figure 9(a) shows an example of the relationship between each area display and its threshold. The column "Camera Location" indicates each area display, and the columns "Temperature Status 1," "Temperature Status 2," and "Temperature Status 3" indicate the temperature status within each area display, classified by the threshold of each area display. In this figure, each area display has two thresholds. Therefore, there are three temperature statuses as a result of comparing the thresholds and the temperature. As described above, the temperature sensors 93a to 93d shown in Figures 9(a) and 9(b) are temperature sensors installed in different locations inside the digital camera 100 and measure the temperature at each camera location. As shown in FIG. 9(a), when measuring the temperature of a single camera location, such as the "lens surface" or "grip," it is possible to use multiple temperature sensors and set a threshold for each temperature sensor to determine the temperature status. Alternatively, it is also possible to use a single temperature sensor to determine the temperature status, such as for the "LCD," "media," or "battery." This is determined based on the relationship between the location of the temperature sensor 93 and the location recommended for cooling. The same temperature sensor may also be used to determine the temperature status in different locations, such as the "lens surface" or "grip." Furthermore, the same temperature sensor and the same threshold may also be used to determine the temperature status in different locations, such as the "media" and "battery." In this embodiment, "LCD" refers to the display unit 28. In other words, message 732 recommends applying a coolant to the display unit 28 for cooling. Similarly, "LCD" in FIGS. 9(a) and 9(b) also refers to the display unit 28.

[0134] Note that the system control unit 50 may use a fixed value such as a value stored in the system memory 52 or the like as the threshold value for each area display, or may use a dynamic value such as a value calculated from the state of the digital camera 100. Also, as the threshold value for each area display, the threshold value when transitioning from the temperature state 1 shown in FIG. 9(a) to the temperature state 2 and the threshold value when transitioning from the temperature state 2 to the temperature state 1 may be set to different threshold values depending on the states before and after the transition. If the threshold values are the same, there is a possibility of changing between the temperature state 1 and the temperature state 2 in a short time, and the temperature state may change immediately, causing the user to feel bothered or confused.

[0135] FIG. 8(a) is an example of notifying the user in the text of the cooling recommended location of which part should be cooled. As described above using FIGS. 7(a) to (d), the cooling recommended location is the arrangement position of the temperature sensor 93.

[0136] The message 816 is shown on the display unit 28 when any one of the temperature sensors 93 exceeds the temperature Kh (described above in FIG. 4) that limits the operation of the digital camera 100. If there is a temperature sensor that has exceeded the temperature Kh, the position where the corresponding temperature sensor is arranged is displayed as a high-temperature location. When the temperature Kn obtained by the temperature sensor satisfies Kl ≦ Kn ≦ Kh, the arrangement position of the corresponding temperature sensor is displayed as a medium-temperature location. Note that when there are a plurality of threshold values corresponding to each location, the temperature state may be set and displayed for each threshold value as shown in FIG. 10(a) according to the temperature measured at each location and the number of exceeded threshold values.

[0137] The message 817 in FIG. 8(b) is a message displayed on the display unit 28 when the temperature Kn is Kn < Kl in all the temperature sensors among the temperature sensors 93 where the digital camera 100 is arranged. When Kn < Kl in all the temperature sensors, neither the external view of the digital camera 100 as shown in FIG. 7(a) nor the display of the message 817 described in FIG. 8(b) may be performed.

[0138] 10 shows an example of cooling method options for the digital camera 100 that are displayed on the display unit 28 in S350 of FIG. 3(b). A dialog box 1001 is displayed superimposed on the LV image. In the dialog box 1001, selection items 1002 and 1003 and a message 1004 are displayed.

[0139] Message 1004 displays a sentence such as "Running the fan is effective for cooling the camera." In this embodiment, a sentence like message 1004 is used, but this is not limiting. For example, a sentence such as "There are two ways to cool the camera" may also be used.

[0140] If the user selects the selection item 1002, the fan 92 starts to operate, and if the user selects the selection item 1003, the power to the digital camera 100 is turned off.

[0141] If the remaining battery charge in the power supply unit 30 is lower than a predetermined level, the digital camera 100 is powered off regardless of the user's selection or the temperature difference T2-T1. That is, the remaining battery charge is determined before the determination in S349 of FIG. 3B. If the remaining battery charge is lower than a predetermined level, the process proceeds to S353. If the fan 92 is driven when the remaining battery charge is lower than a predetermined level, power is consumed by the fan 92, resulting in the remaining battery charge dropping to 0 and making video recording impossible. Therefore, if the remaining battery charge is lower than a predetermined level, the digital camera 100 is powered off to allow the digital camera 100 to cool. Once the digital camera 100 has cooled sufficiently, the digital camera 100 can be powered on again and video recording can resume. This control allows the user to record video, which is considered to be the user's highest priority, without any inconvenience.

[0142] As described above, according to this embodiment, electronic devices can be cooled more efficiently by determining and executing the most appropriate cooling method depending on the situation from different cooling methods, namely, cooling using a cooling means such as rotating a fan and cooling by turning off the power.

[0143] The various controls described above as being performed by the system control unit 50 may be performed by a single piece of hardware, or the entire device may be controlled by multiple pieces of hardware (e.g., multiple processors or circuits) sharing the processing.

[0144] Furthermore, although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the gist of the present invention are also included in the present invention. Furthermore, each of the above-described embodiments merely represents one embodiment of the present invention, and each embodiment can be combined as appropriate.

[0145] Furthermore, in the above-described embodiment, the present invention has been described as being applied to a digital camera, but this is not limited to this example and the present invention can be applied to any electronic device that can acquire the temperature of the device. That is, the present invention can be applied to personal computers, PDAs, mobile phone terminals, portable image viewers, printers with displays, digital photo frames, music players, game consoles, e-book readers, and the like.

[0146] The present invention is not limited to being applied to electronic devices, but can also be applied to control devices that communicate with electronic devices (including digital cameras and network cameras) via wired or wireless communication and remotely control the electronic devices. Examples of devices that remotely control electronic devices include smartphones, tablet PCs, and desktop PCs. The electronic devices can be remotely controlled by issuing commands from the control device to the imaging device to perform various operations or settings based on operations or processes performed on the control device. Furthermore, live view images captured by the electronic device may be received via wired or wireless communication and displayed on the control device.

[0147] (Other embodiments) The present invention can also be realized by executing the following process. That is, software (programs) that realize the functions of the above-described embodiments are supplied to a system or device via a network or various storage media, and the computer (or CPU, MPU, etc.) of the system or device reads and executes the program code. In this case, the program and the storage media storing the program constitute the present invention.

Claims

1. An electronic device, a plurality of temperature acquisition means for acquiring temperatures, the plurality of temperature acquisition means including a first temperature acquisition means close to an exterior of the electronic device and a second temperature acquisition means close to a center of the electronic device; A display means; a control means for controlling the display means to display an external view of the electronic device on the display means in accordance with the location of the temperature acquisition means that exceeds a predetermined threshold value when the temperature acquired by the temperature acquisition means exceeds the threshold value, and to display a notification indicating a location in the electronic device that should be cooled on the external view; a cooling unit that cools the electronic device by a fan; and the control means controls to execute a first cooling method of driving the cooling means when a difference between a first temperature acquired by the first temperature acquisition means and a second temperature acquired by the second temperature acquisition means is greater than a predetermined value, and to execute a second cooling method of turning off a power supply to the electronic device when a difference between the first temperature and the second temperature is equal to or less than a predetermined value. An electronic device characterized by:

2. The electronic device according to claim 1 , wherein the control means controls the display so as to indicate the location to be cooled on the external view and to display a notification indicating a recommended cooling method.

3. 3. The electronic device according to claim 2, wherein the recommended cooling method includes at least one of a cooling method of applying a coolant to the area to be cooled, a cooling method of applying cool air to the area to be cooled, and a cooling method of replacing the battery with a low-temperature battery.

4. The electronic device described in claim 3, wherein the control means determines one or more cooling methods from a plurality of cooling methods including at least one of a cooling method of applying a coolant to the area to be cooled, a cooling method of applying cool air to the area to be cooled, and a cooling method of replacing the battery with a low-temperature battery, depending on the temperature of the temperature acquisition means that exceeds the threshold, and controls the electronic device to notify the determined cooling method as the recommended cooling method.

5. 2. The electronic device according to claim 1, wherein when a temperature acquired by at least one of the plurality of temperature acquisition means exceeds the predetermined threshold, the control means identifies areas to be cooled based on the plurality of temperatures acquired from the plurality of temperature acquisition means and the locations of the plurality of temperature acquisition means, and controls the electronic device to display a notification indicating the identified areas to be cooled in the external view.

6. 6. The electronic device according to claim 1, wherein the predetermined threshold value is different for each of the plurality of temperature acquisition units.

7. the electronic device is an imaging device capable of capturing video; The control means If video recording is in progress, the notification will not be displayed until a user gives an instruction even if the predetermined threshold is exceeded. If video recording is not being performed, displaying the notification in response to exceeding the predetermined threshold.

7. The electronic device according to claim 1, wherein the electronic device is controlled as follows:

8. 8. The electronic device according to claim 1, wherein the control unit controls the notification not to be displayed when the temperatures acquired by the plurality of temperature acquisition units do not exceed the predetermined threshold value.

9. 9. The electronic device according to claim 1, wherein the control unit displays the notification indicating the location to be cooled using at least one of an icon and text.

10. the control means controls to execute any one of the first cooling method, the second cooling method, and a third cooling method in which both the first cooling method and the second cooling method are executed when the temperature acquired by the temperature acquisition means exceeds a first threshold value; 10. The electronic device according to claim 1, wherein the first and second electrodes are electrically connected to the first and second electrodes.

11. 11. The electronic device according to claim 10, wherein the control unit controls the execution of any one of the first cooling method, the second cooling method, and the third cooling method until the temperature acquired by the temperature acquisition unit becomes equal to or lower than a second threshold value that is lower than the first threshold value.

12. A method for controlling an electronic device having a plurality of temperature acquisition means for acquiring temperatures, the plurality of temperature acquisition means including a first temperature acquisition means close to an exterior of the electronic device and a second temperature acquisition means close to a center of the electronic device, and a cooling means for cooling the electronic device by a fan, the method comprising: a temperature acquisition step of acquiring temperatures from the plurality of temperature acquisition means; a display control step of controlling, when at least one of the temperatures acquired in the temperature acquisition step exceeds a predetermined threshold, to display an external view of the electronic device on a display means in accordance with an arrangement position of the temperature acquisition means at which the predetermined threshold has been exceeded, and to display a notice indicating a location in the electronic device that should be cooled on the external view; a control step of executing a first cooling method for driving the cooling means when the difference between the first temperature acquired by the first temperature acquisition means and the second temperature acquired by the second temperature acquisition means is greater than a predetermined value, and executing a second cooling method for turning off the power supply of the electronic device when the difference between the first temperature and the second temperature is equal to or less than a predetermined value.

1. A method for controlling an electronic device, comprising:

13. A program for causing a computer to execute the method for controlling an electronic device according to claim 12.

14. A computer-readable storage medium storing a program for causing a computer to execute the electronic device control method according to claim 12.

Images