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

Abstract

To allow longer recording in a recording medium according to a user's selection.SOLUTION: An electronic apparatus has: temperature acquisition means that acquires the temperature of a recording medium attached to the electronic apparatus; setting means that can set at least one of settings including a first setting and a second setting; and control means that, when the first setting is set, in response to satisfying a predetermined condition related to an increase in temperature of the recording medium, controls to restrict at least a specific motion in which the speed of writing in the recording medium requires a predetermined speed or more, and when the second setting is set, controls not to restrict the specific motion even if the predetermined condition is satisfied.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an electronic device that controls operational limitations related to heat in an image capture device capable of recording moving images, and a control method thereof. [Background technology]

[0002] In recent years, many imaging devices (digital cameras) capable of recording moving images have become known. When recording moving images, heat is generated in various places inside the imaging device, and measures against the generated heat are an important issue in terms of the impact on users and protection of the device / image quality. In recent years, the surface temperature of recording media inserted (mounted) into imaging devices, such as memory cards, has increased due to faster writing speeds and improved image quality of recordable videos, and there is a risk of the user being burned when carelessly attempting to remove the recording media. Patent Document 1 discloses that the temperature of the camera is measured, and when the measured temperature becomes high, the high power consumption video mode is prohibited and the device switches to the low power consumption still image mode. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-28425 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, when high-quality video recording is started and writing (recording) is performed on the recording medium, the temperature of the recording medium becomes high in a short time, making it impossible to record video in video mode. On the other hand, if video recording is allowed to continue even when the temperature of the recording medium becomes high, there is a risk that a user who tries to remove the recording medium carelessly may be surprised by the heat and drop the recording medium or get burned.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to enable recording on a recording medium to be continued for a longer period of time in response to a user's selection. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention An electronic device, The electronic device has a temperature acquisition means for acquiring the temperature of a recording medium attached to the electronic device, a setting means capable of setting at least one of a first setting and a second setting, and a control means, wherein the first setting is a setting for turning off the power of the electronic device when a predetermined condition related to a rise in the temperature of the recording medium is satisfied, and the control means, in the case of the first setting, stops a specific operation that requires a writing speed to the recording medium at or above a predetermined speed in response to the satisfaction of the predetermined condition, and controls to turn off the power of the electronic device, and in the case of the second setting, controls so as not to stop the specific operation even if the predetermined condition is satisfied. Effect of the Invention

[0007] According to the present invention, it is possible to allow recording on a recording medium for a longer period of time in response to a user's selection. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an external view of a digital camera 100. [Diagram 2] 1 is a schematic block diagram showing an example of the hardware configuration of a digital camera 100. FIG. [Diagram 3] FIG. 13 is a control flowchart for setting the automatic power-off temperature in the menu mode. [Figure 4] FIG. 11 is a flowchart of control regarding the automatic power-off temperature in the shooting mode process (moving image mode). [Diagram 5] 13A and 13B are examples of a setting screen for setting the automatic power-off temperature on a setting menu screen, and display examples when restricting operation in a video recording mode. [Figure 6] FIG. 2 is a diagram showing the layout of temperature sensors in the digital camera 100. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0010] <External view of digital camera 100> 1(a) and (b) show external views of a digital camera 100 as an example of a device (electronic 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 a display unit provided on the rear surface of the camera that displays images and various information. A touch panel 70a is a touch operation member that can detect touch operations on the display surface (operation surface) of the display unit 28. An outside-finder display unit 43 is a display unit provided on the top surface of the camera that displays various settings of the camera, including shutter speed and aperture.

[0011] The shutter button 61 is an operation unit for issuing a shooting instruction. The mode change switch 60 is an operation unit for switching between various modes. The terminal cover 40 is a cover for protecting a connector (not shown) that connects a connection cable with an external device to the digital camera 100. The main electronic dial 71 is a rotary operation member included in the operation unit 70, and by turning this main electronic dial 71, settings such as the shutter speed and aperture can be changed. The power switch 72 is an operation member for switching the power of the digital camera 100 on and off. The sub electronic dial 73 is a rotary operation member included in the operation unit 70, and can be used to move the selection frame and advance images. The cross key 74 is an operation member included in the operation unit 70 and has a push button that can be pressed in four directions. Operations can be performed according to the direction in which the cross key 74 is pressed. The SET button 75 is included in the operation unit 70, is a push button, and is mainly used to confirm setting items.

[0012] The video button 76 is used to start and stop video recording (recording). The AE lock button 77 is included in the operation unit 70, and by pressing it in the shooting standby state, the exposure state can be fixed. The enlargement button 78 is included in the operation unit 70, and is an operation button for turning on and off the enlargement mode in the live view display in the shooting mode. By turning on the enlargement mode and then operating the main electronic dial 71, the live view image can be enlarged or reduced. In the playback mode, it functions as an enlargement button for enlarging the playback image and increasing the magnification ratio. The playback button 79 is included in the operation unit 70, and is an operation button for switching between the shooting mode and the playback mode. By pressing the playback button 79 during the shooting mode, the mode is switched to the playback mode, and the latest image among the images recorded in the recording medium 200 can be displayed on the display unit 28. The menu button 81 is included in the operation unit 70, and by pressing it, a menu screen in which various settings can be made is displayed on the display unit 28. The user can intuitively make various settings using the menu screen displayed on the display unit 28, the cross key 74, and the SET button 75.

[0013] The touch bar 82 (multifunction bar: M-Fn bar) is a line-shaped touch operation member (line touch sensor) capable of receiving touch operations. The touch bar 82 is disposed at a position where it can be touched (touched) by the thumb of the right hand when the grip part 90 is held in the right hand (held with the little finger, ring finger, and middle finger of the right hand) so that the shutter button 61 can be pressed with the index finger of the right hand. That is, the touch bar 82 is disposed at a position where it can be operated when the eyepiece part 16 is placed close to the viewfinder and the user is in a position (shooting posture) so that the shutter button 61 can be pressed at any time. The touch bar 82 is a reception part that can receive tap operations (operations of touching and releasing without moving within a predetermined period) and slide operations to the left and right (operations of touching and then moving the touch position while keeping the touch) on the touch bar 82. The touch bar 82 is an operation member different from the touch panel 70a, and does not have a display function.

[0014] The communication terminal 10 is a communication terminal for the digital camera 100 to communicate with the lens unit 150 (described later; detachable) side. The eyepiece 16 is an eyepiece of the eyepiece finder 17 (a peer-in type finder), and the user can view an image displayed on an internal EVF 29 (Electronic View Finder) through the eyepiece 16. The eyepiece detection unit 57 is an eyepiece detection sensor that detects whether or not the user (photographer) has placed his / her eye on the eyepiece 16. The cover 202 is a cover for a slot that stores a recording medium 200 (described later). The grip unit 90 is a holding unit shaped to be easily held with the right hand when the user holds the digital camera 100. The shutter button 61 and the main electronic dial 71 are located at positions that can be operated with the index finger of the right hand when the digital camera 100 is held by gripping the grip unit 90 with the little finger, ring finger, and middle finger of the right hand. In the same state, the sub electronic dial 73 and touch bar 82 are disposed at positions that can be operated with the thumb of the right hand. The thumb rest section 91 (thumb standby position) is a grip member provided on the rear side of the digital camera 100 at a position where it is easy to place the thumb of the right hand that is holding the grip section 90 when none of the operation members are being operated. The thumb rest section 91 is made of a rubber member or the like to enhance holding power (grip feeling).

[0015] <Block diagram of digital camera 100> FIG. 2 is a block diagram showing an example of the configuration of a digital camera 100 according to this embodiment. In FIG. 2, a lens unit 150 is a lens unit equipped with an interchangeable photographing lens. The lens 103 is usually composed of multiple lenses, but FIG. 2 shows only one lens for simplicity. The communication terminal 6 is a communication terminal for the lens unit 150 to communicate with the digital camera 100. The lens unit 150 communicates with the system control unit 50 via this communication terminal 6 and the above-mentioned communication terminal 10, and controls the aperture 1 via the aperture drive circuit 2 by the internal lens system control circuit 4. Thereafter, the lens 103 is displaced via the 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 (image sensor) configured with a CCD, CMOS element, or the like that converts an optical image into an electrical signal. The imaging unit 22 may have an imaging surface phase difference sensor that outputs defocus amount information to the system control unit 50. The A / D converter 23 converts the analog signal output from the imaging unit 22 into a digital signal.

[0018] The image processing unit 24 performs predetermined processing (pixel interpolation, resizing such as reduction, color conversion, etc.) on the data from the A / D converter 23 or the data from the memory control unit 15. The image processing unit 24 also performs predetermined arithmetic processing using the captured image data, and 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 allows TTL (through-the-lens) type AF (autofocus) processing, AE (autoexposure) processing, EF (flash pre-flash) processing, etc. to be performed. The image processing unit 24 further performs predetermined arithmetic processing using the captured image data, and performs TTL type AWB (auto white balance) processing based on the obtained arithmetic results.

[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 into 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, and 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 image data for display written in the memory 32 is displayed by 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 in response to 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] Various settings of the camera, including the shutter speed and aperture, are displayed on the outside viewfinder display section 43 via an outside viewfinder display section drive circuit 44 .

[0022] The non-volatile memory 56 is an electrically erasable and recordable memory, and may be, for example, a Flash-ROM. Constants, programs, and the like for the operation of the system control unit 50 are stored in the non-volatile memory 56. The programs referred to here are programs for executing various flowcharts described later in this embodiment.

[0023] The system control unit 50 is a control unit consisting of at least one processor or 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. For example, a RAM is used for the system memory 52, and constants and variables for the operation of the system control unit 50, programs read from the nonvolatile memory 56, etc. are expanded therein. The system control unit 50 also performs display control by controlling the memory 32, the display unit 28, etc.

[0024] The system timer 53 is a timing unit that measures the time used for various controls and the time of a built-in clock.

[0025] The mode changeover switch 60, the first shutter switch 62, the second shutter switch 64, and the operation unit 70 are operation means for inputting various operation instructions to the system control unit 50. The mode changeover switch 60 switches the operation mode of the system control unit 50 to one of a still image shooting mode, a video recording mode, etc. Modes included in the still image shooting mode include an auto shooting mode, an auto scene discrimination mode, a manual mode, an aperture priority mode (Av mode), a shutter speed priority mode (Tv mode), and a program AE mode (P mode). In addition, there are various scene modes and custom modes that are shooting settings according to shooting scenes. The mode changeover switch 60 allows the user to directly switch to one of these modes. Alternatively, after switching to a list screen of shooting modes with the mode changeover switch 60, one of the displayed modes may be selected and switched using other operation members. Similarly, the video recording mode may also include multiple modes.

[0026] 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 (instruction to prepare for shooting) during operation of the shutter button 61. The first shutter switch signal SW1 starts shooting preparation operations such as AF (autofocus) processing, AE (auto exposure) processing, AWB (auto white balance) processing, and EF (pre-flash) processing.

[0027] 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. Also, the second shutter switch signal SW2 is generated when an item having a function of instructing photography and displayed on the display unit 28 is touched. The system control unit 50 starts a series of operations for photographing processing from reading a signal from the imaging unit 22 to writing the captured image to the recording medium 200 as an image file in response to the second shutter switch signal SW2.

[0028] The operation unit 70 is a variety of operation members that serve as an input unit for receiving operations from the user. The operation unit 70 includes at least the following operation parts: the shutter button 61, a touch panel 70a, a main electronic dial 71, a power switch 72, a sub electronic dial 73, a cross key 74, a SET button 75, a movie button 76, an AE lock button 77, a magnification button 78, a playback button 79, and a menu button 81.

[0029] The power supply control unit 80 is composed of a battery detection circuit, a DC-DC converter, a switch circuit for switching between blocks to which electricity is applied, etc., and detects whether a battery is attached, the type of battery, and the remaining battery power. 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 necessary voltage for the necessary period to each unit including the recording medium 200. The power supply unit 30 is composed of primary batteries such as alkaline batteries and lithium batteries, secondary batteries such as NiCd batteries, NiMH batteries, and Li batteries, an AC adapter, etc.

[0030] 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 is composed of a semiconductor memory, a magnetic disk, etc. Various memory cards (described later) can be attached to the recording medium I / F (recording medium interface) 18, and various information such as the temperature and environment inside the card and the writing speed can be obtained from the attached memory card.

[0031] 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 live view 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.

[0032] The attitude detection unit 55 detects the attitude of the digital camera 100 with respect to the direction of gravity. Based on the attitude detected by the attitude detection unit 55, it is possible to determine whether the 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 attitude detected by the attitude 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 attitude detection unit 55. It is also possible to detect the movement of the digital camera 100 (panning, tilting, lifting, whether it is stationary, etc.) using the acceleration sensor or gyro sensor that is the attitude detection unit 55.

[0033] The eyepiece detection unit 57 is an eyepiece detection sensor that detects the approach (eye approach) and departure (eye separation) of the eye (object) 161 to the eyepiece unit 16 of the finder (approach detection). The eyepiece detection unit 57 can be, for example, an infrared proximity sensor, and can detect the approach of some object to the eyepiece unit 16 of the finder that incorporates the EVF 29. When an object approaches, infrared rays projected from a light-projecting unit (not shown) of the eyepiece detection unit 57 are reflected and received by a light-receiving unit (not shown) of the infrared proximity sensor. Depending on the amount of infrared rays received, it is possible to determine how close the object is to the eyepiece unit 16 (eyepiece distance). In this way, the eyepiece detection unit 57 performs eyepiece detection to detect the proximity of the object to the eyepiece unit 16. When an object is detected approaching within a predetermined distance from the non-eyepiece state (non-approach state), it is detected that the object has been placed in eye contact. When an object that has been detected as approaching moves away from the eye-closed state (approaching state) by a distance greater than a predetermined distance, it is detected that the eye has been removed. The threshold for detecting eye-closedness and the threshold for detecting eye-removal may be different, for example, by providing hysteresis. In addition, after eye-closedness is detected, the eye-closed state is maintained until eye-removal is detected. After eye-removal is detected, the non-eye-closed state is maintained until eye-closedness is detected. Note that the infrared proximity sensor is only one example, and other sensors may be used for the eye-closedness detection unit 57 as long as they can detect the approach of an eye or object that can be considered as an eye-closed state.

[0034] The temperature sensors 91a, 91b, and 91c are temperature sensors that acquire (measure) the temperature of the digital camera 100. An example of the location of each temperature sensor is shown in FIG. 6. FIG. 6 is a diagram of the digital camera 100 viewed from the display unit 28 side with the EVF 29 facing up. The temperature sensor 91a is a temperature sensor arranged near the insertion opening (mounting opening) of the recording medium 200 protected by the lid 202, and measures the temperature to calculate the surface temperature of the exterior of the recording medium to be inserted (mounted) into the digital camera 100. This prevents the user from getting burned when the surface temperature of the exterior of the recording medium becomes high and the user opens the lid 202 to remove the recording medium from the digital camera 100. The temperature sensor 91b is a temperature sensor arranged near the imaging unit 22, and the temperature sensor 91c is a temperature sensor arranged near the system control unit 50, and measures the temperature near each device. If each device becomes too hot (for example, 80° C. or higher), the device may not function properly or the image quality may deteriorate, so the temperature is measured to prevent these. 6, some types of recording medium 200 have a temperature sensor inside the recording medium 200 to measure the temperature. Such a temperature sensor inside the recording medium 200 may be used instead of temperature sensor 91a. Note that the number and positions of the sensors described in this embodiment are not limited to those described above.

[0035] The settings related to video recording specifically refer to the video recording quality, video recording format, frame rate, and compression method. The video recording quality refers to the number of recording pixels (recording size), such as FHD (1920 pixels horizontal × 1080 pixels vertical), 4K (3840 pixels horizontal × 2160 pixels vertical), and 8K (7680 pixels horizontal × 4420 pixels vertical). The video recording format is the file format when recording videos. For video recording, either the RAW format or the MP4 format can be selected. In the RAW format, data output from the imaging element is digitally converted and recorded without RAW development processing. In the MP4 format, data output from the imaging element is subjected to RAW development processing, and further compressed and recorded by the image processing unit 24 according to the compression format setting. The higher the video recording quality, the more the load on the processing in the imaging unit 22 is increased, and the more likely it is that heat will be generated. In other words, the temperature measured by the temperature sensor 91b is more likely to rise. If the video recording format is the RAW format, no compression is performed and therefore no load is placed on the image processing unit 24, but as the data is uncompressed raw data, the amount of data is large, and it becomes necessary to write the data to the recording medium 200 at high speed, which places a load on the image processing unit 24 and is likely to generate heat. In other words, a lot of power is consumed in communication between the digital camera 100 and the recording medium 2-00, and the temperature measured by the temperature sensor 91a is likely to rise. If the video recording format is the MP4 format, compression is performed and therefore a load is placed on the image processing unit 24 and therefore heat is likely to be generated, but as the data amount is suppressed to a certain extent due to compression, a load is unlikely to be placed on the image processing unit 24 when recording to the recording medium 200. In other words, the temperature measured by the temperature sensor 91a is unlikely to rise.

[0036] Frame rate (fps: frames per second) refers to the number of frames recorded and played back per second. There are 120fps, 60fps, and 30fps, and the higher the number, the smoother the video you can record. Depending on the country or region, the frame rate may be greater than 119fps, 59fps, or 29fps, such as 119.9fps, 59.94fps, or 29.97fps. The compression method refers to the method used to compress the recorded images, and includes the ALL-I method, which compresses on a frame-by-frame basis, and the IPB method, which compresses on a multiple-frame basis. The IPB method provides stronger compression than the ALL-I method, resulting in smaller file sizes (ALL-I method > IPB method). When one of the compression methods is selected, the video is recorded as an MP4 format video file.

[0037] Memory cards, which are a type of recording medium, come in a variety of types (standards), such as SDXC memory cards, XQD memory cards, CFast cards, and CFexpress (CFX) cards. Each type has its own standard, and requires a compatible card reader. In addition, the maximum transfer speed varies depending on the standard, and although there are slight differences depending on the manufacturer and series, the standards stipulate that the maximum transfer speeds are roughly as follows: SDXC (registered trademark) memory card (Video Speed ​​Class V90): Approx. 90 MB / sec. XQD (registered trademark) memory card: Approx. 440MB / sec. CFast (registered trademark) card: Approx. 600MB / sec. CFexpress (registered trademark) card Type B: Approx. 2000MB / sec.

[0038] The faster the transfer speed, the higher the quality and the larger the capacity of still images and videos can be transferred (written) to the memory card in a short time. For example, even when taking continuous high-quality still images (continuous shooting) or recording high-quality videos, if the transfer speed is fast, shooting and recording will not stop due to the buffer being full, reducing inconvenience to the user. A buffer full state refers to a state in which still images and videos cannot be recorded because there is not enough free space in memory 32, which is the work memory for continuously recording still images and videos.

[0039] Fig. 3 is a control flowchart for settings related to video recording in menu mode processing in this embodiment. The control processing in this embodiment is realized by loading a program recorded in non-volatile memory 56 in digital camera 100 into system memory 52 and executing it by system control unit 50. The control processing flowchart in Fig. 3 starts when digital camera 100 is powered on and menu button 81 is pressed.

[0040] A display example of the setting menu screen is shown in FIG. 5(a). When the page of the automatic power-off temperature setting is selected on the setting menu screen, the display shown in FIG. 5(a) is displayed on the display unit 28 (transitioning to a page of a lower hierarchy of the automatic power-off temperature setting), and setting items 501 and 502 are displayed. When the user selects the setting item 501, the automatic power-off temperature is set to "standard", and when the temperature measured by the temperature sensor 91a shown in FIG. 6 reaches a predetermined temperature (70° C. in this embodiment), the power of the digital camera 100 is turned off. When the setting item 502 is selected, the power of the digital camera 100 is not turned off even if the temperature measured by the temperature sensor 91a shown in FIG. 6 reaches the predetermined temperature. In FIG. 5(a), the cursor is displayed on the setting item 502, and at this time, a message 502a calls attention to the fact that setting the setting item 502 may cause the surface temperature of the recording medium 200 to rise. Note that, in this embodiment, whether or not to turn off the power is controlled depending on the condition that the temperature measured by the temperature sensor 91a reaches a predetermined temperature (limit temperature), but this is not limited thereto. As will be described later in S304, it is also possible to control whether or not to turn off the power depending on the type of the inserted recording medium 200 (memory card) and the settings related to moving images.

[0041] In S301, the system control unit 50 determines whether or not there has been an instruction to transition to an automatic power-off temperature setting screen. If there has been an instruction to transition, the process proceeds to S302, and if not, the process proceeds to S307.

[0042] In S302, the system control unit 50 displays a setting screen for the automatic power-off temperature on the display unit 28. An example of the display at this time is shown in Fig. 5(a).

[0043] In S303, the system control unit 50 determines whether or not the setting of the automatic power-off temperature has been changed. If the setting has been changed, the process proceeds to S304, and if not, the process proceeds to S307.

[0044] In S304, the system control unit 50 determines the change content of the automatic power off temperature setting. If the setting is changed to "standard", proceed to S305, and if it is changed to "high", proceed to S306. In the initial setting (factory setting) of the digital camera 100, the automatic power off temperature is set to "standard". In this step, the user controls the temperature to be set to any of the settings, but this is not limited to this. The temperature can also be changed according to the memory card (recording medium 200) inserted (mounted). For example, if a CFexpress card is inserted, the temperature can be set to 90°C, but if an XQD card is inserted, the temperature can be set to 60°C. The temperature can also be changed according to the settings related to video recording set by the user. For example, if the video recording format is RAW format or the video recording quality is 8K, the automatic power off temperature setting can be set to "high", and if the video recording format is MP4 format or the video recording quality is 4K / FHD, the automatic power off temperature setting can be set to "standard". In addition, when the remaining battery charge or the remaining charge of the recording medium 200 is low, the automatic power-off temperature setting may be set to "standard," and when there is sufficient charge, the setting may be set to "high."

[0045] In S305, the system control unit 50 sets the automatic power-off temperature to “standard” and stores this in the non-volatile memory 56.

[0046] In S306, the system control unit 50 sets the automatic power-off temperature to “high” and stores this in the non-volatile memory 56.

[0047] In S307, since it is determined that S301 and S303 are No, the system control unit 50 determines whether or not a setting related to video recording has been changed. If a setting has been changed, the process proceeds to S308, and if not, the process proceeds to S309. In this step, since it is only necessary to check the temperature increase measured by the temperature sensor 91a, the system control unit 50 checks whether or not a setting of the video recording format has been changed. In this embodiment, only the video recording format is checked, but the video recording image quality may also be checked. Even if the video recording format is the RAW format, if the video recording image quality is FHD, the temperature (the temperature measured by the temperature sensor 91a) of the recording medium 200 may not easily increase. On the other hand, even if the video recording format is the MP4 format, if the video recording image quality is high, such as 4K or 8K, the temperature of the recording medium 200 may easily increase. In addition to the above, if there are settings that cause the temperature of the recording medium 200 to increase, the system may check whether or not the settings have been changed.

[0048] In S308, the system control unit 50 performs settings in response to the changes in the settings related to moving image recording, and stores the settings in the non-volatile memory 56.

[0049] In S309, the system control unit 50 determines whether or not there has been an instruction to set other setting items. If there has been a change in the settings, the process proceeds to S310. If not, the process proceeds to S311. The other setting items may be, for example, items related to the AF method for still images.

[0050] In S310, the system controller 50 changes the settings changed in S309, and saves them in the non-volatile memory 56.

[0051] In S311, the system control unit 50 determines whether or not a video recording start instruction has been issued. If a start instruction has been issued, the process proceeds to S408 in FIG. 4, and if not, the process proceeds to S312. An instruction to start video recording specifically refers to pressing the video button 76 or touching a touch button provided on a device that can be remotely controlled to start recording a video. In this embodiment, pressing the shutter button 61 transitions from video recording mode to still image shooting mode, but if a video recording start instruction can be issued by pressing the shutter button 61, video recording may be started in response to pressing the shutter button 61.

[0052] In S312, the system control unit 50 determines whether or not a mode switching operation has been performed. If a mode switching has been performed, the process proceeds to S313, and if not, the process returns to S301. A mode switching operation refers to pressing the playback button 79 or the shutter button 61. For example, when the playback button 79 is pressed, the process transitions to a playback mode process in which a captured image is played back. When the shutter button 61 is pressed, the process transitions to a shooting mode process (standby state for still images). When the video button 76 is pressed, the process transitions to a shooting mode process (standby state for video) and video recording begins.

[0053] In S313, the system control unit 50 transitions to a mode process corresponding to the operating member operated in S312, and ends the menu mode.

[0054] 4 is a control process flowchart relating to the temperature of the digital camera 100 when recording a moving image and to recording a moving image in this embodiment. The control process in this embodiment is system-controlled by loading a program recorded in non-volatile memory 56 in the digital camera 100 into system memory 52. ​​The control process flowchart in FIG. 4 is started when the power of the digital camera 100 is turned on and the camera is in a shooting standby state (shooting mode processing (moving image mode)). Note that this embodiment is a display control in which a display is performed on the display unit 28, but the control is also applicable to a case in which a display is performed on the EVF 29 or an external monitor.

[0055] In S401, the system control unit 50 acquires settings related to control of the digital camera 100 stored in the non-volatile memory 56 and the current temperature from the temperature sensors 91a to 91c. Specifically, in this step, settings related to video recording are acquired.

[0056] In S402, the system control unit 50 determines whether or not the menu button 81 has been pressed. If the menu button 81 has been pressed, the process proceeds to the control process flowchart in FIG. 3, which is the menu mode process, and if the menu button 81 has not been pressed, the process proceeds to S403.

[0057] In S403, the system control unit 50 determines whether or not a recording medium is inserted (attached) in the digital camera 100. If it is inserted, the process proceeds to S404, and if it is not inserted, the process proceeds to S419.

[0058] In S404, the system control unit 50 acquires information about the memory card, which is the recording medium inserted in the digital camera 100. In this step, it is possible to acquire information about the card standard, such as an SD card, a CFExpress card, or a CFast card, specifications such as the writing speed to the card, the card manufacturer name, and the product name.

[0059] In S405, the system control unit 50 judges whether or not moving image recording is possible based on the setting contents acquired in S401 and the memory card information acquired in S404. If moving image recording is possible, the process proceeds to S407, and if not, the process proceeds to S406. Specifically, moving image recording is not possible in the following cases: Based on the settings related to moving image recording acquired in S401 or S404 and the inserted memory card information, the remaining capacity of the memory card is not enough to start moving image recording; The standard or specifications of the memory card are not suitable for the digital camera 100, or the like, and are not suitable for the current settings for moving image recording. Also, based on the charge state of the battery attached to the digital camera 100 and the temperatures measured by the temperature sensors 91a to 91c, the system control unit 50 judges whether or not moving image recording is possible.

[0060] In S406, the system control unit 50 displays a message on the display unit 28. The content of the message is the reason why it was determined to be No in S403 or S405, such as "No card" or "No battery power remaining."

[0061] In S407, similarly to S311, the system control unit 50 determines whether or not a moving image recording start instruction has been issued. If a moving image recording start instruction has been issued, the process proceeds to S408, and if not, the process returns to S401.

[0062] In S408, the system control unit 50 starts recording a moving image. That is, a moving image file is created in the recording medium 200, and a moving image captured by the imaging unit 22 with the current settings is recorded.

[0063] In S409, the system control unit 50 refers to the non-volatile memory 56 and determines what the automatic power-off temperature setting is. If the automatic power-off temperature is set to "standard" (setting item 501 in FIG. 5), the process proceeds to S410, and if it is set to "high" (setting item 502 in FIG. 5), the process proceeds to S411.

[0064] In S410, the system control unit 50 judges whether the temperature measured by the temperature sensor 91a has reached the limit temperature. If the limit temperature has been reached, the process proceeds to S412, and if not, the process proceeds to S411. It is judged whether the temperature measured by the temperature sensor 91a, that is, the surface temperature of the exterior of the memory card, has reached the limit temperature. The limit temperature in this step is 70°C. When the video recording format is set to the RAW format, the temperature sensor 91a has the largest temperature increase rate among the temperature sensors 91a, 91b, and 91c during video recording. Therefore, normally, the temperature measured by the temperature sensor 91a should reach the limit temperature before the temperatures measured by the temperature sensors 91b and 91c reach the respective limit temperatures. This is because, as described above, video recording in the RAW format places a large load on the recording medium 200 when writing the video.

[0065] In S411, the system control unit 50 judges whether or not the other temperature sensors have reached the limit temperature. If the limit temperature has been reached, the process proceeds to S412, and if not, the process proceeds to S417. For example, if the measured temperature of at least one of the temperature sensors 91b and 91c has reached 80° C., the result is Yes.

[0066] In S412, the system control unit 50 stops the video recording. When the shooting stops, the system control unit 50 performs a closing process (such as adding attribute information) of the video file created in the recording medium 200. In this way, when the automatic power off temperature setting is set to "standard," if the temperature measured by the temperature sensor 91a reaches the limit temperature, the system control unit 50 stops the video recording. By stopping the video recording, operations that require a writing speed of a predetermined speed or more (such as recording a video in high image quality) are restricted. This prevents the temperature of the recording medium 200 (memory card) from rising, and prevents a user from being burned even if the user carelessly opens the cover 202 and touches the recording medium 200. If the result of the determination in S410 is Yes, it is possible that a load is placed on the writing to the memory card, generating heat. As described above, if it is considered that the surface temperature of the memory card has risen due to high-speed writing (transfer) to the memory card, it is not necessary to necessarily stop the video recording just by restricting operations that require a writing speed of a predetermined speed or more. In other words, if the result of S410 is Yes, video recording is not stopped, but rather, video recording can be controlled to continue by restricting operations that require a writing speed of a predetermined speed or more, such as switching from RAW format to MP4 format or switching to video recording at low image quality. The predetermined speed here is, for example, 601 MB. If the result of S411 is Yes, the video recording is controlled to be stopped because the temperature is the limit temperature to avoid device failure, deterioration of image quality, low-temperature burns, etc., and lowering the temperature as quickly as possible is the top priority. On the other hand, if the automatic power-off setting is determined to be "high" in S409, video recording is not stopped even if the temperature of the temperature sensor 91a reaches the limit temperature. When the user sets the automatic power-off setting to "standard," the digital camera 100 records video in RAW format at 23°C for only about 15 to 20 minutes, and at 40°C for only about 3 to 4 minutes, which may be inconvenient for the user. For this reason, the automatic power-off setting is set to "high" so that longer video recording can be performed.Although the surface temperature of the exterior of the memory card becomes higher than the temperature limit, there is no problem if the user does not immediately open the cover 202. Also, if the user is careful when removing the memory card, wears gloves, or waits a certain amount of time before removing the card, the possibility of burns can be reduced.

[0067] In S413, the system control unit 50 displays "Power will be turned off due to temperature rise" (message 510) on the display unit 28. An example of the display at this time is shown in FIG. 5(b). In FIG. 5(b), the entire display unit 28 is filled with black instead of the LV image, and the message 510 is displayed. In this embodiment, when video recording is stopped due to temperature, the top priority is to lower the temperature as soon as possible, and the power of the digital camera 100 is turned off. However, since the power is turned off unintentionally by the user, a large display as shown in FIG. 5(b) is used to notify the user so that the display is more easily visible. As described above in S412, when the temperature at the temperature sensor 91a reaches the limit temperature (S410Yes), it is not necessary to stop video recording or turn off the power, and it is sufficient to limit operations that require a writing speed to the memory card. Therefore, when operations are limited due to the temperature of the temperature sensor 91a, the display is controlled to display a message to the effect that operations are limited, such as "The temperature of the card has risen, so operations will be limited." When the power supply of digital camera 100 is turned off due to reaching the limit temperature, message 510 is displayed by filling the entire display unit 28 with black instead of the LV image, but this is not limited to the above. That is, message 510 may be superimposed on the entire display unit 28 while the shooting information display is visible, or message 510 may be displayed as an icon together with the LV image.

[0068] In S414, the system control unit 50 determines whether or not a predetermined time has elapsed. If the predetermined time has elapsed, the process proceeds to S415, and if not, the process returns to S414. In this embodiment, the predetermined time is about 5 seconds.

[0069] In S415, the system controller 50 makes the message displayed in S413 non-displayable.

[0070] In S416, the system control unit 50 turns off the power of the digital camera 100, and ends the control flowchart of FIG. 4. As described in S413, when video recording is stopped due to temperature, turning off the power rather than leaving the camera in standby mode reduces the temperature inside the digital camera 100 and the exterior / interior of the memory card more quickly. For this reason, the power is turned off even if there is no user operation. Note that if the user operates the power switch 72, the power of the digital camera 100 is turned off even if the specified time has not passed in S414.

[0071] In S417, the system control unit 50 determines whether or not an instruction to stop video recording has been received. If an instruction to stop has been received, the process proceeds to S418, and if not, the process returns to S409. An instruction to stop video recording specifically refers to pressing the video button 76 or the shutter button 61. If the shutter button 61 is pressed while video recording is not being performed, the system transitions to a standby state for still images in the shooting mode process, but if the shutter button 61 is pressed during video recording, the video recording is stopped.

[0072] In S418, similarly to S412, the system control unit 50 stops recording of moving images.

[0073] In S419, the system control unit 50 determines whether or not the shooting standby state has ended. For example, if the shooting standby state has ended due to power off or the like, the control flowchart in FIG. 4 ends. If not, the process returns to S401.

[0074] In this embodiment, an automatic power-off temperature setting is provided as a setting for whether or not to turn off the power of the digital camera 100 when the temperature measured by the temperature sensor 91a reaches a limit temperature, which is a predetermined temperature, but it is not limited to turning off the power. It is also possible to control the camera so that, when the temperature reaches a predetermined temperature, video recording is stopped if video recording is in progress, or the camera is turned off if video recording is not in progress. Not limited to video recording, if a predetermined temperature is reached during continuous shooting (continuous shooting) of still images, continuous shooting is stopped.

[0075] In addition to recording of moving images in the digital camera 100, it is also possible to restrict operations that are considered to be a cause of an increase in the temperature of the recording medium 200 (temperature measured by the temperature sensor 91a). For example, when a recording medium (memory card) is attached to a communication device such as a smartphone, if the temperature of the recording medium rises, the operation is restricted. If the temperature of the recording medium rises when backing up photos and applications stored in the recording medium to the cloud via the Internet, the backup is temporarily stopped. Backup from the recording medium to the cloud may be performed by a user instruction, may be performed automatically on a regular basis, or may be automatically started in response to a wireless (WiFi) connection. Backup is also stopped not only when the backup is to the cloud, but also when the temperature of the card rises during backup from the internal storage of the smartphone to the memory card (external storage) attached thereto.

[0076] In this embodiment, a dedicated temperature sensor (placed at the insertion port of the recording medium 200) is provided for measuring (acquiring) the surface temperature of the recording medium 200, and control is performed according to the temperature acquired by this temperature sensor, but this is not limited to this. As described above, similar control is possible by acquiring the temperature acquired by a temperature sensor that measures the internal temperature of the recording medium 200 through the recording medium I / F, and controlling the device according to user settings when the internal temperature of the recording medium 200 reaches a predetermined temperature.

[0077] In this manner, in this embodiment, the temperature of the recording medium 200 attached to the digital camera 100 is measured, and the operation of the digital camera 100 is controlled according to the user's setting (selection). If the setting is set to restrict the operation of the digital camera 100 when the temperature of the recording medium 200 reaches a predetermined temperature (limit temperature), the operation that requires a predetermined speed of writing to the recording medium 200 is restricted. By controlling in this manner, it is possible to reduce the possibility that the user will be surprised by the heat of the recording medium 200 when trying to remove it carelessly and will drop the recording medium 200 or be burned. If the setting is set not to restrict the operation of the digital camera 100 when the temperature of the recording medium 200 reaches a predetermined temperature, the operation that requires a speed of writing to the recording medium 200 higher than the predetermined speed is not restricted. By controlling in this manner, it is possible to reduce the loss of shooting opportunities due to the occurrence of operation restrictions, such as the unintended stopping of video recording or the deterioration of the recording format or image quality.

[0078] 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.

[0079] In addition, although the present invention has been described in detail based on the preferred embodiments, 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-mentioned embodiments merely shows one embodiment of the present invention, and each embodiment can be appropriately combined.

[0080] In the above-mentioned embodiment, the present invention has been described as being applied to the digital camera 100, but the present invention is not limited to this example and can be applied to any electronic device that can measure the surface temperature of a recording medium inserted (mounted) in the device. In other words, the present invention can be applied to personal computers, external monitors, mobile phone terminals, portable image viewers, music players, game consoles, and the like.

[0081] The present invention is also applicable not only to the imaging device itself, but also to a control device that communicates with an imaging device (including a network camera) via wired or wireless communication and remotely controls the imaging device. Examples of devices that remotely control an imaging device include a smartphone, a tablet PC, and a desktop PC. The imaging device can be remotely controlled by notifying the control device of commands that cause the imaging device to perform various operations and settings based on operations or processes performed on the control device. Also, a live view image captured by the imaging device may be received via wired or wireless communication and displayed on the control device.

[0082] (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-mentioned 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 medium storing the program constitute the present invention.

Claims

1. An electronic device, a temperature acquisition means for acquiring a temperature of a recording medium mounted in the electronic device; A setting means capable of setting at least one of settings including a first setting and a second setting; A control means, the first setting is a setting for turning off a power supply of the electronic device when a predetermined condition related to an increase in temperature of the recording medium is satisfied, The control means When the first setting is selected, in response to the predetermined condition being satisfied, a specific operation that requires a writing speed to the recording medium to be equal to or faster than a predetermined speed is stopped, and a power supply of the electronic device is turned off; In the case of the second setting, control is performed so that the specific operation is not stopped even if the predetermined condition is satisfied.

1. An electronic device comprising:

2. The electronic device according to claim 1 , wherein the specific operation is recording of a moving image.

3. 2. The electronic device according to claim 1, wherein the specific operation is at least one of recording moving images at a picture quality higher than a predetermined picture quality, recording moving images at a frame rate higher than a predetermined number of frames, and recording moving images in a predetermined format.

4. 4. The electronic device according to claim 1, wherein the specific operation is at least one of recording moving images at a picture quality higher than FHD, recording moving images at a frame rate higher than 119 fps, and recording moving images in a RAW format.

5. 5. The electronic device according to claim 1, wherein the temperature acquisition unit is a temperature sensor that measures the temperature of the recording medium and is disposed at an attachment port of the recording medium.

6. 6. The electronic device according to claim 1, wherein the predetermined condition includes that the temperature of the recording medium acquired by the temperature acquisition unit reaches a predetermined temperature.

7. 7. The electronic device according to claim 6, wherein the predetermined temperature is 70 degrees Celsius.

8. 8. The electronic device according to claim 6, wherein the predetermined condition includes at least one of the following when recording a moving image using the electronic device: a moving image recording format is set to a RAW format; the recording medium is not a Type B CFexpress card; and a transfer speed of the recording medium is slower than 600 MB / sec.

9. The electronic device described in any one of claims 1 to 8, characterized in that the control means, when the second setting, controls the power of the electronic device not to be turned off even if the specified condition is satisfied.

10. The electronic device described in any one of claims 1 to 9, characterized in that the setting means pre-sets one of settings including the first setting and the second setting in response to a user operation before starting the specific operation.

11. The electronic device according to any one of claims 1 to 10, characterized in that, when the control means is set to the second setting by the user, the control means controls the display unit to display a message warning the user not to inadvertently open a lid that stores the recording medium.

12. When the recording medium is not installed in the electronic device, the control means 12. The electronic device according to claim 1, wherein, regardless of the setting content of the setting means, control is performed so that an operation that requires high speed writing to the recording medium is not executed.

13. The imaging unit further includes: The electronic device described in any one of claims 1 to 12, characterized in that the control means records the image captured by the imaging unit on the recording medium, and, in response to the temperature of the recording medium acquired by the temperature acquisition means while recording the image satisfying the specified condition, controls the electronic device to stop operations that require high speed writing to the recording medium in the first setting and turn off the power of the electronic device, and to not stop operations that require high speed writing to the recording medium in the second setting.

14. Further comprising a recording medium interface into which a CFexpress card can be attached, 14. The electronic device according to claim 1, wherein the control means controls to perform writing on the CFexpress card attached to the recording medium interface.

15. The electronic device described in any one of claims 1 to 14, characterized in that when the control means is in the second setting, it does not stop the specific operation even if the specified condition regarding the rise in temperature of the recording medium is satisfied, but controls the specific operation to be stopped and the power supply of the electronic device to be turned off in response to a second condition related to the rise in temperature of a component within the electronic device other than the recording medium being satisfied.

16. 16. The electronic device according to claim 15, wherein the electronic device is an image pickup device including an image pickup section, and a member in the electronic device other than the recording medium is the image pickup section.

17. a second temperature acquisition means for acquiring a temperature of the imaging unit; The control means In the case of the first setting, when the temperature of the recording medium acquired by the temperature acquisition means reaches a first temperature, the specific operation is stopped and the power supply of the electronic device is turned off; In the case of the second setting, the specific operation is not stopped even if the temperature of the recording medium acquired by the temperature acquisition means reaches the first temperature, and the specific operation is stopped and the power supply of the electronic device is turned off in response to the temperature of the imaging unit acquired by the second temperature acquisition means reaching a second temperature. Control so that 17. The electronic device according to claim 16 .

18. 18. The electronic device according to claim 16, wherein the specific operation is an operation that causes a temperature rise of the recording medium to be greater than a temperature rise of the imaging unit.

19. 18. The electronic device according to claim 17, wherein the second temperature is greater than the first temperature.

20. A method for controlling an electronic device, comprising: a temperature acquisition step of acquiring a temperature of a recording medium attached to the electronic device; A setting step capable of setting at least one of the settings including a first setting and a second setting; In the case of the first setting, in response to a predetermined condition regarding an increase in temperature of the recording medium being satisfied, at least a specific operation that requires a writing speed to the recording medium to be equal to or higher than a predetermined speed is restricted; and a control step of controlling the specific operation so as not to restrict the specific operation even if the predetermined condition is satisfied when the second setting is selected, The method for controlling an electronic device, wherein the first setting is a setting for turning off a power supply to the electronic device when the predetermined condition is satisfied.

21. A program for causing a computer to function as each of the means of the electronic device according to any one of claims 1 to 10.

22. 20. A computer-readable recording medium storing a program for causing a computer to function as each of the means of the electronic device according to any one of claims 1 to 19.

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