Electronic device and control method thereof

Abstract

Disclosed is an electronic device and a control method thereof, the electronic device including: an acquisition unit configured to acquire a temperature of a camera; and at least a memory and at least one processor serving as a calculation unit configured to calculate a time limit for recording a moving image based on the temperature acquired by the acquisition unit; and a control unit configured to perform control to display the time limit on a display unit in a standby state in which a moving image is not recorded in a moving image recording mode.

Description

TECHNICAL FIELD

[0001] The present application relates to an electronic apparatus and a control method thereof, which controls an operation restriction with respect to heat on an image pickup apparatus capable of recording a moving image. BACKGROUND

[0002] In recent years, many image pickup apparatuses capable of recording a moving image are known. When a moving image is recorded, heat is generated inside the image pickup apparatus. Therefore, in order to prevent an influence on a user and to protect the apparatus and the quality of a picture, it is an important problem to deal with the generated heat. In particular, due to improvement in the quality of an image that can be shot in recent years, an increase in the temperature inside the apparatus in a live view image pickup standby state has a great influence on a decrease in the recording time due to the temperature increase when a moving image is recorded. Japanese Patent Application Publication No. 2017-73740 discusses a technology in which, at the time of starting recording of a moving image, it is determined whether a moving image can be recorded using a set image pickup parameter based on the image pickup parameter and the accumulated time of moving image recording. If it is determined that a moving image cannot be recorded using the set image pickup parameter, a warning sound is emitted, and the user is informed that a moving image can be recorded using an image pickup parameter with less power consumption. Japanese Patent Application Publication No. 2012-165372 discusses a technology in which, in a case where a moving image is started to be recorded, a recordable time in which a moving image can be recorded in a range not exceeding a predetermined temperature from the temperature inside the housing of the image pickup apparatus is calculated, and the recordable time is displayed on a display unit during the moving image recording. [SUMMARY]

[0004] However, in Japanese Patent Application Publication No. 2017-73740, it is determined whether a moving image can be recorded using the currently set image pickup parameter at the time of starting recording of a moving image. Therefore, before the image pickup is started, the user does not know whether a moving image can be shot with the current image pickup parameter. Even if the shooting of an image is successfully started, the user can miss an image pickup opportunity if the image can be shot only for a shorter time than the user assumes. In Japanese Patent Application Publication No. 2012-165372, after a moving image is started to be recorded, a recordable time based on the temperature inside the housing is displayed. Therefore, the user does not know how long a moving image can be recorded until the shooting of an image is started. Therefore, the user does not know when the shooting of an image should be started so that the user can shoot an image for a desired length of time. Further, since the recordable time is reduced even in the image pickup standby state, the user cannot determine whether the image pickup apparatus should be turned off or should be kept on. SUMMARY

[0005] The present application aims to enable a user to recognize a time in which a moving image can be recorded while an image pickup apparatus is in an image pickup standby state.

[0006] According to an aspect of the present application, an electronic device includes an acquisition unit configured to acquire a temperature of an image pickup device, a calculation unit configured to calculate a time limit for recording a moving image based on the temperature acquired by the acquisition unit, and a control unit configured to perform control to display the time limit on a display unit in a standby state in which the moving image is not recorded in a moving image recording mode.

[0007] Other features of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1A and 1B is an appearance of a digital camera.

[0009] Figure 2 is a schematic block diagram showing an example of a hardware configuration of a digital camera.

[0010] Figure 3 is a diagram showing an arrangement of a temperature sensor of a digital camera according to the present exemplary embodiment.

[0011] Figure 4 is a control flowchart at the time of startup of a digital camera according to the present exemplary embodiment.

[0012] Figure 5A and 5B is a control flowchart of time display in a moving image recording mode according to the present exemplary embodiment.

[0013] Figures 6A-6G is a diagram showing an example of time display according to the present exemplary embodiment.

[0014] Figure 7A and 7B is a graph regarding a setting content of a digital camera according to the present exemplary embodiment and a temperature rise. DETAILED DESCRIPTION

[0015] Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0016] It should be noted that the following exemplary embodiments are merely one example for implementing the present application, and can be appropriately modified or changed according to various configurations and various conditions of a device to which the present application is applied. Therefore, the present application is by no means limited to the following exemplary embodiments.

[0017] Exemplary embodiments to which the present application is applied will be described below with reference to the accompanying drawings.

[0018] Figure 1A and Figure 1BThe appearance of a digital camera 100 is shown as an example of a device (electronic device) to which the present application is applicable. Figure 1A is a front perspective view of the digital camera 100. Figure 1B is a rear perspective view of the digital camera 100. As Figure 1A and Figure 1B shown, the display unit 28 is a display unit provided on the back of the digital camera 100 and displays images and various information. The touch panel 70a is a touch operation member, and can detect a touch operation on the display surface (operation surface) of the display unit 28. The external viewfinder display unit 43 is a display unit provided on the upper surface of the digital camera 100, and displays various setting values of the digital camera 100, such as the setting values of shutter speed and aperture.

[0019] The shutter button 61 is an operation unit for issuing a photographing instruction. The mode selection switch 60 is an operation unit for switching various modes. The terminal cover 40 is a cover that protects a connector (not shown) for connecting a connection line for an external device and the digital camera 100. The main electronic dial 71 is a rotary operation member included in the operation unit 70. The setting value of shutter speed or aperture can be changed by rotating the main electronic dial 71. The power switch 72 is an operation member for switching on and off of the digital camera 100. The sub electronic dial 73 is a rotary operation member included in the operation unit 70, and can move a selection frame or advance an image. The steering wheel 74 is an operation member included in the operation unit 70, and has buttons that can be pressed in four directions. The steering wheel 74 enables operations according to the direction in which the steering wheel 74 is pressed. The setting button 75 is a button included in the operation unit 70, and is mainly used for confirming options.

[0020] The moving image button 76 is used to issue an instruction to start or stop recording a moving image. An auto exposure (AE) lock button 77 is included in the operation unit 70. The exposure state can be fixed by pressing the AE lock button 77 in the image capturing standby state. The enlargement button 78 is an operation button included in the operation unit 70, and is used to turn on and off an enlargement mode in the live view display in the image capturing mode. The live view image can be enlarged and reduced by turning on the enlargement mode and then operating the main electronic dial 71. In the reproduction mode, the enlargement button 78 is used as an enlargement button for enlarging a reproduced image and increasing the magnification. The reproduction button 79 is an operation button included in the operation unit 70, and is used to switch the image capturing mode and the reproduction mode. When the reproduction button 79 is pressed in the image capturing mode, the image capturing mode is changed to the reproduction 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. When the menu button 81 is pressed, a menu screen on 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 direction pad 74, and the setting button 75.

[0021] The communication terminal 10 is a communication terminal for the digital camera 100 to communicate with the lens unit 150 (detachable from the digital camera 100). The eyepiece portion 16 is an eyepiece portion of an ocular viewfinder (gaze-type viewfinder). The user can visually confirm a video displayed on an electronic viewfinder (EVF) 29 in the ocular viewfinder through the eyepiece portion 16. The eye proximity detection unit 57 is an eye proximity detection sensor that detects whether the photographer's eye is close to the eyepiece portion 16. The cover 202 is a cover of a slot that stores the recording medium 200. The grip portion 90 is a holding portion having a shape that makes it easy for the user to hold the holding portion with his / her right hand when the user holds up the digital camera 100. The shutter button 61 and the main electronic dial 71 are located at positions where the user can operate the shutter button 61 and the main electronic dial 71 with the index finger of the right hand in a state where the user holds the grip portion 90 with the right hand little finger, ring finger, and middle finger to hold the digital camera 100. The sub electronic dial 73 is located at a position where the user can operate the sub electronic dial 73 with the thumb of the right hand in the same state.

[0022] Figure 2 is a block diagram showing an example of the configuration of the digital camera 100 according to the present exemplary embodiment. In Figure 2 the lens unit 150 is a lens unit on which an interchangeable image capturing lens is mounted. Although the lens 103 generally includes a plurality of lenses, the lens 103 is illustrated as a single lens in Figure 2A single lens is shown in a simplified manner. The communication terminal 6 is a communication terminal of the lens unit 150 with the digital still camera 100. The lens unit 150 communicates with the system control unit 50 via the communication terminals 6 and 10, and causes the lens system control circuit 4 within the lens unit 150 to control the aperture 1 via the aperture drive circuit 2. Then, the lens unit 150 moves the lens 103 via the auto focus (AF) drive circuit 3, thereby focusing the lens 103.

[0023] The shutter 101 is a focal plane shutter capable of freely controlling the exposure time of the imaging unit 22 by the control of the system control unit 50.

[0024] The imaging unit 22 is an image sensor composed of a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) device, which converts an optical image into an electric signal. An analog-digital (A / D) converter 23 is used to convert an analog signal output from the imaging unit 22 into a digital signal.

[0025] The image processing unit 24 performs a size adjustment process such as predetermined pixel interpolation and reduction, and a color conversion process on data from the A / D converter 23 or data from the memory control unit 15. The image processing unit 24 performs a predetermined calculation process using captured image data. The system control unit 50 performs exposure control and distance measurement control based on a calculation result obtained by the image processing unit 24. Thus, AF processing, AE processing, and pre-flash (EF) processing are performed by a through-the-lens (TTL) method. Further, the image processing unit 24 performs a predetermined calculation process using captured image data, and performs auto white balance (AWB) processing by a TTL method based on an obtained calculation result.

[0026] The memory control unit 15 controls transmission and reception of data 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 in 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 or the EVF 29. The memory 32 includes a sufficient storage capacity for storing a predetermined number of still images and moving images, and a predetermined time length of sound.

[0027] The memory 32 functions as a memory for image display (video memory). Image data written in the memory 32 for display is displayed on the display unit 28 or the EVF 29 via the memory control unit 15. The display unit 28 or the EVF 29 performs display on a display device such as a liquid crystal display (LCD) or an organic electroluminescence (EL) display, in accordance with a signal from the memory control unit 15. Data is converted to digital data by the A / D converter 23, and the digital data is accumulated in the memory 32, and then sequentially transferred to and displayed on the display unit 28 or the EVF 29, so that the display unit 28 or the EVF 29 can perform live view display (LV display). Hereinafter, an image of live view display will be referred to as a "live view image (LV image)".

[0028] The external viewfinder display unit 43 displays various setting values of the digital camera 100, such as setting values of shutter speed and aperture, via the external viewfinder display unit drive circuit 44.

[0029] The nonvolatile memory 56 is an electrically erasable and recordable memory. For example, a flash read only memory (ROM) is used as the nonvolatile memory 56. The nonvolatile memory 56 stores constants and programs for operation of the system control unit 50. The "program" used herein refers to a program for executing various flowcharts described later in the present exemplary embodiment.

[0030] The system control unit 50 is a control unit including at least one processor or circuit, and controls the entire digital camera 100. The system control unit 50 executes the above-described programs recorded in the nonvolatile memory 56, thereby realizing the processes described later in the present exemplary embodiment. For example, a random access memory (RAM) is used as the system memory 52. Constants and variables for operation of the system control unit 50 and programs read from the nonvolatile memory 56 are loaded into the system memory 52. The system control unit 50 also controls the memory 32 and the display unit 28, thereby performing display control.

[0031] The system timer 53 is a time measurement unit for measuring time for various types of control and time of a built-in clock.

[0032] An operation unit 70 including a mode selection switch 60, a first shutter switch 62, and a second shutter switch 64 is an operation unit for inputting various operation instructions to the system control unit 50. The mode selection switch 60 is used to switch the operation mode of the system control unit 50 to any one of a still image capturing mode and a moving image recording mode. The still image capturing mode includes an automatic capturing mode, an automatic scene distinguishing mode, a manual mode, an aperture priority mode (Av mode), a shutter speed priority mode (Tv mode), and a program AE mode (P mode). The still image capturing mode also includes various scene modes in which a capturing setting is made in accordance with a capturing scene, and a custom mode. A user can directly switch to any one of these modes using the mode selection switch 60. Alternatively, the user can switch to a list screen of the capturing modes using the mode selection switch 60 once, then select any one of a plurality of modes displayed on the list screen, and switch to the selected mode using other operation members. Similarly, the moving image recording mode can also include a plurality of modes.

[0033] In a middle state of the operation of the shutter button 61 provided in the digital camera 100, that is, by half pressing (capturing preparation instruction) the first shutter switch 62 is opened, and a first shutter switch signal SW1 is generated. Based on the first shutter switch signal SW1, the system control unit 50 starts a capturing preparation operation such as AF processing, AE processing, AWB processing, and EF processing.

[0034] By completing the operation of the shutter button 61, that is, by fully pressing (capturing instruction) the second shutter switch 64 is opened, and a second shutter switch signal SW2 is generated. Based on the second shutter switch signal SW2, the system control unit 50 starts a series of operations from reading a signal from the capturing unit 22 to writing a captured image as an image file to the recording medium 200.

[0035] The operation unit 70 includes various operation members, and functions as an input unit that receives operations from a user. The operation unit 70 includes at least operation members such as the shutter button 61, a touch panel 70a, a main electronic dial 71, a power switch 72, a sub electronic dial 73, a steering wheel 74, a setting button 75, a moving image button 76, an AE lock button 77, a zoom-in button 78, a reproduction button 79, and a menu button 81.

[0036] The power supply control unit 80 includes a battery detection circuit, a direct current-direct current (DC / DC) converter, and a switching circuit for switching modules to be powered. The power supply control unit 80 detects whether a battery is installed, the type of the battery, and the remaining life of the battery. The power supply control unit 80 controls the DC / DC converter based on the detection result and an instruction from the system control unit 50, and supplies a required voltage to components including the recording medium 200 for a required period of time. The power supply unit 30 includes a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a nickel-cadmium (NiCd) battery, a nickel-hydrogen (NiMH) battery, or a lithium-ion (Li) battery, or an alternating current (AC) adapter.

[0037] The recording medium interface (I / F) 18 is an interface with the 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 a captured image, and is a semiconductor memory or a magnetic disk.

[0038] The communication unit 54 is connected to an external device wirelessly or via a cable for wired connection, and transmits and receives a video signal and a sound signal to / from the external device. The communication unit 54 can also be connected to a wireless local area network (LAN) or the Internet. The communication unit 54 can also communicate with the external device using Bluetooth (registered trademark) or Bluetooth Low Energy. The communication unit 54 can transmit an image captured by the imaging unit 22 (including a live view image) or an image stored in the recording medium 200 to the external device, and can also receive an image or various other information from the external device.

[0039] The posture detection unit 55 detects the posture of the digital camera 100 with respect to the direction of gravity. Based on the posture detected by the posture detection unit 55, the system control unit 50 can determine whether the image captured by the imaging unit 22 is horizontally or vertically held with respect to the image captured by the digital camera 100. The system control unit 50 can add direction information according to the posture detected by the posture detection unit 55 to an image file of the image captured by the imaging unit 22, or store the image by rotating the image based on the posture detected by the posture detection unit 55. An acceleration sensor or a gyro sensor can be used as the posture detection unit 55. Using an acceleration sensor or a gyro sensor as the posture detection unit 55, the system control unit 50 can also detect the motion of the digital camera 100 (whether the digital camera 100 is panning, tilting, lifting, or stationary).

[0040] The eye proximity detection unit 57 is an eye proximity detection sensor that detects (proximity detection) approach (eye approach) and retreat (eye retreat) of an eye (physical body) to / from the eyepiece section 16 of the viewfinder. For example, an infrared proximity sensor can be used as the eye proximity detection unit 57. The eye proximity detection unit 57 can detect approach of some physical body to the eyepiece section 16 of the viewfinder in which the EVF 29 is built in. If the physical body approaches, infrared light projected from a light projection section (not shown) of the eye proximity detection unit 57 is reflected by the physical body. Then, the reflected infrared light is received by a light receiving section (not shown) of the infrared proximity sensor. From the amount of received infrared light, it is also possible to determine how far the approaching physical body is from the eyepiece section 16 (eye approach distance). As described above, the eye proximity detection unit 57 performs eye proximity detection to detect the distance at which the physical body approaches the eyepiece section 16. In a non-eye-approach state (non-approach state), eye approach is detected if the physical body that approaches the eyepiece section 16 is detected to be within a predetermined distance from the eyepiece section 16. In an eye-approach state (approach state), eye retreat is detected if the approaching physical body is detected to retreat from the eyepiece section 16 by more than the predetermined distance. For example, by providing hysteresis, the threshold for detecting eye approach and the threshold for detecting eye retreat can be different from each other. After eye approach is detected, the eye-approach state is assumed to continue until eye retreat is detected. After eye retreat is detected, the non-eye-approach state is assumed to continue until eye approach is detected. The infrared proximity sensor is merely an example, and other sensors can be used as the eye proximity detection unit 57 as long as the sensor can detect approach of an eye or a physical body that can be regarded as eye approach.

[0041] The touch panel 70a and the display unit 28 can be formed integrally. For example, the touch panel 70a is configured so that the light transmittance does not hinder display of the display unit 28. Then, the touch panel 70a is mounted to the upper layer of the display surface of the display unit 28. Then, input coordinates on the touch panel 70a are associated with display coordinates on the display screen of the display unit 28. Thus, it is possible to provide a graphical user interface (GUI) as if the user can directly operate the screen displayed on the display unit 28. The system control unit 50 can detect the following operation on the touch panel 70a or the following state.

[0042] • A state in which no finger or pen that contacts the touch panel 70a has just contacted the touch panel 70a, that is, touch-on (hereinafter referred to as "touch-down").

[0043] • A state in which a finger or pen touches the touch panel 70a (hereinafter referred to as "touch-on").

[0044] • A state in which a finger or a pen is moved while the finger or the pen is kept in contact with the touch panel 70a (hereinafter referred to as "touch move").

[0045] • A state in which a finger or a pen in contact with the touch panel 70a is separated from the touch panel 70a, that is, the end of touch (hereinafter referred to as "touch up").

[0046] • A state in which nothing is in contact with the touch panel 70a (hereinafter referred to as "touch off").

[0047] If touch down is detected, touch on is also detected at the same time. After touch down, touch on is generally continuously detected if touch up is not detected. Touch move is also detected in a state in which touch on is detected. Even when touch on is detected, touch move is not detected if the touch position is not moved. After touch up of all the fingers or pens that have touched the touch panel 70a is detected, touch off is detected.

[0048] These operations and states and the position coordinates of the finger or pen contact with the touch panel 70a are notified to the system control unit 50 via the system bus. Based on the information notified to the system control unit 50, the system control unit 50 determines what operation (touch operation) is performed on the touch panel 70a. In the case of a touch movement, the system control unit 50 can also determine the moving direction of the finger or pen moved on the touch panel 70a with respect to the vertical and horizontal portions on the touch panel 70a based on the change in the position coordinates. If it is detected that a touch movement of more than a predetermined distance is performed, the system control unit 50 determines that a flick operation is performed. In other words, a flick is an operation in which the touch panel 70a is quickly traced with a finger in a flicking manner while the finger is kept in contact with the touch panel 70a, and then the finger is separated from the touch panel 70a immediately after the quick movement. If it is detected that a touch movement of more than a predetermined distance is performed at more than a predetermined speed, and it is detected that a touch-up is performed immediately after the touch movement, the system control unit 50 can determine that a flick is performed (it can be determined that a flick is performed after a flick operation). Further, a touch operation in which a plurality of positions (for example, two points) are touched at the same time and the touch positions are brought close to each other is called a "pinch-in", and a touch operation in which the touch positions are separated from each other is called a "pinch-out". The pinch-in and the pinch-out are collectively called a "pinch operation" (or simply "pinch"). The touch panel 70a can be any one of various types such as a resistive type, a capacitive type, a surface acoustic wave type, an infrared type, an electromagnetic induction type, an image recognition type, and a photosensor type. There are a method of detecting whether or not a touch is made depending on whether or not a finger or a pen is in contact with the touch panel 70a, and a method of detecting whether or not a touch is made depending on whether or not a finger or a pen is close to the touch panel 70a. Any one of the methods can be used.

[0049] The temperature sensors 91a, 91b, and 91c measure the temperature of the surface and the inside of the housing of the digital still camera 100. Figure 3 An example of the placement position of the temperature sensors 91a, 91b, and 91c is shown. Figure 3is a view of the digital camera 100 as viewed from the display unit 28 side in a state in which the EVF 29 is facing upward. The temperature sensor 91a is placed around the connector protected by the terminal cover 40 and measures the temperature used to calculate the temperature of the surface of the housing of the digital camera 100. The digital camera 100 avoids a situation in which the surface of the housing reaches a certain high temperature (a temperature lower than the temperature limit for protecting the device, specifically, about 46°C) and the user suffers from low-temperature burns by continuing to take an image by holding the grip 90 at that temperature. For this reason, not only is the temperature in the vicinity of the device appropriately measured, but also the temperature of the surface of the housing is appropriately measured. The temperature sensor 91b is placed in the vicinity of the imaging unit 22 and the temperature sensor 91c is placed in the vicinity of the system control unit 50. The temperature sensors 91b and 91c measure the temperature in the vicinity of each device. If each device reaches a high temperature (for example, 80°C or higher), the device can not function properly, or the image quality can deteriorate. Therefore, in order to prevent these phenomena, the temperature sensors 91b and 91c measure the temperature. In the present exemplary embodiment, the temperature sensors are placed in the vicinity of the imaging unit 22 and the system control unit 50. However, the number of sensors placed and the placement position of the sensors are not limited thereto.

[0050] Figure 4 is a flowchart of a control process regarding display on the display unit 28 and recording of a moving image when the moving image is recorded according to the present exemplary embodiment. The control process is implemented in the digital camera 100 by loading a program recorded in the nonvolatile memory 56 into the system memory 52 and executing the program by the system control unit 50. The control process is started when the digital camera 100 is activated (turned on) Figure 4 in the flowchart. In the present exemplary embodiment, display is performed on the display unit 28 in the control process. However, the present application is also applicable to a case in which display is performed on the EVF 29 or an external monitor.

[0051] In step S401, the system control unit 50 determines whether the current mode is the imaging mode. If the current mode is the imaging mode (YES in step S401), the process proceeds to step S402. If not (NO in step S401), the process proceeds to step S403.

[0052] In step S402, the system control unit 50 performs the imaging mode process. The imaging mode process will be described below with reference to FIG. 5.

[0053] In step S403, the system control unit 50 determines whether the current mode is the reproduction mode. If the current mode is the reproduction mode (YES in step S403), the process proceeds to step S404. If not (NO in step S403), the process proceeds to step S405.

[0054] In step S404, the system control unit 50 performs playback mode processing. Playback mode processing is control processing for playing back the captured image. By operating the operation unit 70, image forwarding or zooming operations can be performed on the image played back on the display unit 28.

[0055] In step S405, based on the determinations made in steps S401 and S403, the system control unit 50 performs other processing. "Other processing" refers to, for example, processing of settings for the digital camera 100 and video recording on a settings menu screen.

[0056] In step S406, the system control unit 50 determines whether the processing has ended. If the processing has ended (step S406 is "Yes"), then Figure 4 The control flow diagram ends. If not (step S406 is "No"), the process returns to step S401. The end of the process, for example, means turning off the digital camera 100.

[0057] Figure 5 is in Figure 4 The flowchart for camera mode processing described in step S402. If in Figure 4 In step S401 of the flowchart, if the current mode is determined to be camera mode, then camera mode processing begins.

[0058] In step S501, the system control unit 50 uses the camera unit 22 to start capturing LV images and displays the LV images on the display unit 28. This state is referred to as "camera standby state".

[0059] In step S502, the system control unit 50 acquires the temperatures measured by temperature sensors 91a, 91b, and 91c. As described above, temperature sensor 91a measures the temperature used to calculate the temperature of the housing surface of the digital camera 100. Temperature sensor 91a manages the temperature of the housing surface, thereby preventing the user from being affected when holding the grip portion 90 to take images.

[0060] In step S503, the system control unit 50 calculates the recordable time of a moving image with the current image quality settings (number of recorded pixels, frame rate, and compression method) based on the remaining recordable capacity of the recording medium 200 (hereinafter referred to as "card remaining capacity").

[0061] In step S504, the system control unit 50 determines whether the temperature K of the housing surface acquired in step S502 (temperature calculated from the temperature measured by the temperature sensor 91a) is lower than Kw [°C] or not. If the temperature K is lower than Kw [°C] (K < Kw) (YES in step S504), the processing proceeds to step S505. If not (K ≥ Kw) (NO in step S504), the processing proceeds to step S506. Referring to Figure 7A and 7B Kw [°C] is a temperature lower than K1 [°C] described later. K1 [°C] is a temperature used to determine the time limit to be calculated in step S506. If the temperature K of the housing surface is lower than Kw [°C], it is considered that even if the moving image is started to be captured at this time, as long as the digital camera 100 is used in the normal manner, the temperature K of the housing surface will not reach K1 [°C] by the time the recording of the moving image is finished.

[0062] In step S505, the system control unit 50 displays the recordable time calculated from the card remaining capacity acquired in step S503 on the display unit 28, and holds the displayed recordable time in the system memory 52. Since the determination in step S504 is YES, the temperature K of the housing surface is lower than Kw [°C] (K < Kw). Therefore, even if the moving image is recorded until the recordable time based on the card remaining capacity, and then the recording is finished, the temperature K will not reach K1 [°C]. Therefore, the recordable time based on the card remaining capacity is displayed, instead of the time limit based on the temperature. The recordable time is displayed in a countdown format. Figure 6A and Figure 6C A display example at this time is shown.

[0063] In step S506, the system control unit 50 calculates the time limit for the image capturing from the temperature K of the housing acquired in step S502 and a temperature rise prediction graph. The "temperature rise prediction graph" refers to the graph described later with reference to Figure 7A and 7B and is information recorded in advance in the nonvolatile memory 56. Since the determination in step S504 is NO, it is known that the temperature K of the housing is higher than Kw [°C]. Therefore, if the moving image is recorded until the recordable time based on the card remaining capacity, by the time the recording of the moving image is stopped (finished), the temperature K of the housing can reach K1 [°C] or more. Therefore, in order to prevent the user from being affected, the recording time of the moving image is set with a time limit so that the temperature K of the housing will not reach K1 [°C] or more.

[0064] In step S507, the system control unit 50 determines whether the time limit based on the temperature rise prediction graph is longer than the recordable time based on the remaining capacity of the card, based on the results of the calculations in steps S503 and S506. If the time limit is longer (YES in step S507), the processing proceeds to step S505. If the recordable time is longer (NO in step S507), the processing proceeds to step S508. As described above, in view of the influence on the user due to the temperature K of the housing becoming high, even if the remaining capacity of the card is large, the time limit based on the temperature K of the housing is prioritized.

[0065] In step S508, the system control unit 50 displays the time limit based on the temperature rise prediction graph calculated in step S506 on the display unit 28, and holds the displayed time limit in the system memory 52. The time limit is displayed in a countdown format. Figure 6B and Figure 6D A display example at this time is shown.

[0066] Figures 6A-6D A display example in the camera standby state in which the LV image is displayed on the display unit 28 is shown. Information 602, 604, 605, and 606 are displayed on the display unit 28 together with the LV image 601. The information 602 indicates the setting content of the moving image recording mode, and indicates that the moving image recording mode is set to the program AE in the present exemplary embodiment. The information 604 and 606 indicate the setting content of the moving image recording quality. In the present exemplary embodiment, the information 604 and 606 indicate the setting content of the recording pixel number (recording size) and the frame rate, respectively. Figure 6A and Figure 6B In the information 604, the recording pixel number (recording size) is 4K (3840 horizontal x 2160 vertical pixels), the frame rate is 60 fps, and the compression method is IPB. Figure 6C and Figure 6D In the information 606, the recording pixel number is 8K (7680 horizontal x 4320 vertical pixels), the frame rate is 60 fps, and the compression method is IPB. The information 605a to 605d indicate the longest time in which the moving image can be recorded in the case where the recording of the moving image is started with the parameters set at present.

[0067] Figure 6A and 6C A display example in the case where only the recordable time based on the remaining capacity of the card needs to be considered, not the time limit based on the temperature, due to the determination of YES (K < Kw) in step S504 or step S507 is shown. Therefore, the recordable time based on the remaining capacity of the card is displayed as the information 605a and 605c. The information 605a indicates that the moving image can be recorded for a maximum of 40 minutes. The information 605c indicates that the moving image can be recorded for a maximum of 20 minutes. In Figure 6A In the information 604, it is known that the recording pixel number is 4K. In Figure 6CFrom the information 606, it can be known that the recorded number of pixels is 8K. Based on this, in Figure 6C the recorded number of pixels set as the moving image recording picture quality is larger. If the recorded number of pixels is different, even if the moving image is recorded for the same time, the moving image with a larger recorded number of pixels will occupy more capacity of the recording medium 200. Therefore, as shown in the information 605c, the recordable time is shorter than the time shown in the information 605a. In addition, not only during the recording of the moving image, but also in the camera standby state, due to the LV camera, the temperature of the surface and the inside of the housing will rise (described below with reference to Figure 7A and 7B ). Therefore, even when the current temperature K of the housing surface is K < Kw, the temperature K of the housing surface may become K ≥ Kw due to the digital camera 100 being in the camera standby state for a long time. When the temperature K of the housing surface is K < Kw, the recordable time based on the remaining capacity of the card is used. Therefore, if the recording medium 200 is not changed, a certain recordable time is displayed. However, if the temperature K of the housing surface becomes K ≥ Kw due to a certain period of time passing in the camera standby state, it is necessary to consider the time limit based on the temperature. In this case, the process returns to step S504, and the determination is made again. Through this control, the user can visually confirm that the moving image can be recorded until the recording time based on the remaining capacity of the card.

[0068] Figure 6B and Figure 6D show display examples in the case where the time limit based on the temperature is displayed because it is determined as "No" (K ≥ Kw) in step S504 and "No" in step S507. Figure 6B shows the same content as the setting content of the moving image recording picture quality in Figure 6A , and the information 605b indicates the maximum time limit (35 minutes in this case) when starting to record the moving image using the currently set parameters. Compared with the information 605a in Figure 6A , since the time limit until the temperature K of the housing surface reaches K1 [°C] is considered, the time displayed on the display unit 28 is reduced (shortened) from 40 minutes to 35 minutes. Similarly, Figure 6D shows the same content as the setting content of the moving image recording picture quality in Figure 6C , and the information 605d indicates the maximum time limit (five minutes in this case) when starting to record the moving image using the currently set parameters. Compared with the information 605c in Figure 6C , since the time limit based on the temperature is considered, the display time is reduced from 20 minutes to 5 minutes. If the time from Figures 6A-6B and the time from Figures 6C-6Dthe number of recording pixels, the greater the change in the time during which a moving image can be recorded. This is because the greater the number of pixels to be recorded, the greater the load required for processing for recording a moving image (e.g., compression and writing of a moving image). Thus, more heat is generated in the device, and the temperature of the surface and the inside of the housing increases by degrees (described below with reference to Figure 7A and 7B ). Thus, in the case where the number of recording pixels is 8K as shown in Figure 6D , the digital camera 100 is more greatly affected by temperature due to heat generation, and the time limit is shorter than in the case where the number of recording pixels is 4K as shown in Figure 6B . First, if the number of pixels to be recorded is large, the time during which a moving image can be recorded is short even if the time limit based on temperature is not considered. Thus, it can be inferred that the user feels that the time during which recording can be performed is even shorter. The time during which a moving image can be recorded in the imaging standby state is displayed, so the user can visually confirm how long a moving image can be recorded in the current settings and the current state. Thus, the user can select the timing at which to start recording a moving image by considering whether an image can be captured until a desired timing even when the user starts recording a moving image now, or whether an image can be captured at a desired timing in the case where the user starts recording a moving image later, or whether the digital camera 100 should be turned off before the user starts recording a moving image.

[0069] In step S509, the system control unit 50 determines whether a moving image recording start instruction has been issued. If a moving image recording start instruction has been issued (YES in step S509), the processing proceeds to step S510. If not (NO in step S509), the processing returns to step S504. The "moving image recording start instruction" refers to, for example, pressing the moving image button 76, or touching a touch button provided in a device capable of performing remote control for issuing an instruction to start recording a moving image.

[0070] In step S510, the system control unit 50 begins recording motion images. That is, the system control unit 50 creates a motion image file on the recording medium 200 and records the motion images captured by the camera unit 22 using the currently set content. The system control unit 50 also saves the recordable time displayed in step S505 or the time limit displayed in step S508 in the system memory 52. ​​In other words, it avoids the reduction of the time limit due to an abnormal increase in the temperature K of the housing surface during motion image recording, and allows motion images to be recorded within the recordable time displayed in step S505 or the time limit displayed in step S508. Therefore, the user can record motion images within a visually confirmed time length when recording begins. Thus, it prevents confusion caused by the motion image recording stopping within a time shorter than the time assumed before the start of recording.

[0071] In step S511, the system control unit 50 displays the recording time along with the LV image. "Recording time" refers to the time elapsed since the start of motion image recording in step S510 (the time elapsed after the start of motion image recording). At this time, the recording time is displayed in an incrementing format. Figure 6E An example of the display is shown. Figure 6E It shows the response to such Figure 6C Or, as shown in Figure 6B, this is a display example of a case where motion image recording begins upon receiving a start command during camera standby (recording state). The recording time of the motion image is displayed as information 608. Figure 6E In this context, since information 608 represents one second, it can be understood that one second has elapsed since the motion picture recording start command was issued (one second of motion picture recording has been performed). Information 609 indicates that motion picture recording is in progress. However, the invention is not limited to this. Since it is only necessary to notify the user that motion picture recording is in progress, notification can be given by flashing a red dot without displaying the word "recording." No further information is displayed after the start of motion picture recording. Figures 6A-6D Information 602 and 605a to 605d is shown.

[0072] In step S512, the system control unit 50 determines whether the remaining time for recording motion images is less than or equal to a predetermined time. If the remaining time is less than or equal to the predetermined time ("Yes" in step S512), the process proceeds to step S513. If not ("No" in step S512), the process proceeds to step S514. The remaining time in this case is obtained by subtracting the recording time from the time stored in the system memory 52 when motion image recording began in step S510. In this exemplary embodiment, the predetermined time is, for example, three minutes.

[0073] In step S513, the system control unit 50 displays a warning. Since the determination in step S512 is "Yes", the remaining time in which the moving image can be recorded is less than or equal to the predetermined time. Therefore, the system control unit 50 notifies the user that, after the predetermined time elapses, the recording of the moving image will be stopped without the user's operation. The display of the warning enables the user to recognize that the time in which the image can be taken has run out. Figure 6F An example of the display of the warning is shown. In this case, a warning icon (exclamation mark icon 611) is displayed next to the recording time displayed together with the LV image. In Figure 6F In the example shown in FIG. 6, it is understood from the information 610 that two minutes have elapsed since the start of the recording of the moving image (the recording time is two minutes). Figure 6F The state shown in FIG. 6 corresponds to the case where the recording of the moving image is started in response to the moving image recording instruction in the camera standby state. Figure 6D The case where the recording of the moving image is started in response to the moving image recording instruction in the camera standby state shown in FIG. 6 is shown. Therefore, it is understood that, if the time saved in the system memory 52 in step S510, i.e., five minutes, is subtracted by the recording time, i.e., two minutes, the remaining time (the remaining recording time) is three minutes or less. Therefore, as described above, the warning as shown by the icon 611 is displayed. Therefore, the user can select to continue taking the image or temporarily stop the recording of the moving image and start taking the image again at a desired timing.

[0074] In step S514, the system control unit 50 determines whether a moving image recording stop instruction is issued. If the stop instruction is issued (step S514 is "Yes"), the processing proceeds to step S515. If not (step S514 is "No"), the processing proceeds to step S516. Specifically, the "moving image recording stop instruction" refers to the pressing of the moving image button 76.

[0075] In step S515, the system control unit 50 stops the recording of the moving image. When the taking of the image is stopped, the system control unit 50 performs closing processing (assignment of attribute information) on the moving image file created in the recording medium 200. It has been described that the pressing of the moving image button 76 is the moving image recording stop instruction in step S514. Further, in the case where the mode switching operation is performed or the reproduction button 79 is pressed (an instruction to shift to the reproduction mode processing), or the power switch 72 is operated, the system control unit 50 stops the recording of the moving image and performs the control processing corresponding to each operation.

[0076] In step S516, the system control unit 50 determines whether the capacity of the recording medium 200 has been full (the card is full). If the card is full (step S516 is "Yes"), the processing proceeds to step S517. If not (step S516 is "No"), the processing proceeds to step S524.

[0077] In step S517, similar to step S515, the system control unit 50 stops recording the motion image.

[0078] In step S518, the system control unit 50 displays the message "Motion image recording stopped due to card full". Because "Yes" was determined in step S516, motion image recording stopped against the user's intention. Therefore, the system control unit 50 notifies the user of the reason for stopping motion image recording and a message indicating that motion image recording has stopped. This can be done as follows: Figure 6G The message displayed at this time is shown in message 613 and dialog box 614, or it could be other types of display. Specifically, when recording motion images stops, a warning icon indicating that recording has stopped can be displayed in a magnified manner. Then, in response to the user's operation, the reason for stopping recording can be displayed. Therefore, the user can visually confirm that the recording of motion images has stopped. In addition, the user can also know the reason for stopping. Therefore, it can be understood that if the user wants to resume recording motion images, the user needs to replace the recording medium 200. The message displayed in this step is not limited to the above, as long as the message has content that can notify the user that the recording medium 200 is full.

[0079] In step S519, the system control unit 50 determines whether a predetermined time has elapsed. If the predetermined time has elapsed (step S519 is "Yes"), the process proceeds to step S520. If not (step S519 is "No"), the process returns to step S519. In this exemplary embodiment, the predetermined time is approximately five seconds.

[0080] In step S520, the system control unit 50 hides the message displayed in step S518 and switches to camera standby mode. In this exemplary embodiment, the condition for switching to camera standby mode after displaying the message is that a predetermined time has elapsed. However, the invention is not limited thereto. Specifically, after the message is displayed in step S518, if the user performs an operation on any operating component of the operation unit 70 (e.g., an operation on the steering wheel 74), it is assumed that the user has visually acknowledged the message. Then, the system control unit 50 can hide the message and switch to camera standby mode.

[0081] In step S521, the system control unit 50 determines whether a mode switching operation has been performed. If a mode switching operation has been performed (YES in step S521), the processing proceeds to step S522. If not (NO in step S521), the processing proceeds to step S523. The "mode switching operation" refers to pressing the reproduction button 79 or the menu button 81. For example, if the reproduction button 79 is pressed, the system control unit 50 shifts to the reproduction mode processing for reproducing the captured image. If the menu button 81 is pressed, the system control unit 50 shifts to the setting menu screen.

[0082] In step S522, the system control unit 50 performs the control processing for the other mode processing. The system control unit 50 performs the control processing in step S404 or S405 as described above.

[0083] In step S523, the system control unit 50 determines whether the imaging standby state has ended. For example, if the imaging standby state is ended by turning off the digital camera 100 (YES in step S523), the control flowchart in FIG. 5 ends, and the processing proceeds to step S406 in FIG. 4. Figure 4 If not (NO in step S523), the processing returns to step S501.

[0084] In step S524, the system control unit 50 determines whether the time limit displayed in step S508 has elapsed from the time when the moving image is started to be recorded. The time limit in this case is maintained in step S508, saved in the system memory 52 in step S510, and displayed on the display unit 28. If the time limit has elapsed (YES in step S524), the processing proceeds to step S526. If not (NO in step S524), the processing proceeds to step S525.

[0085] In step S525, the system control unit 50 determines whether the temperature inside the housing has reached Kh [°C]. If the temperature reaches Kh [°C] (YES in step S525), the processing proceeds to step S526. If not (NO in step S525), the processing returns to step S512. The temperature used in this step is the temperature measured using the temperature sensor 91b or 91c. As described above, if the temperature measured by the temperature sensor 91b or 91c exceeds Kh [°C] (for example, 80°C), the device can not work properly, or the image can be deteriorated.

[0086] In step S526, the system control unit 50 stops recording the moving image, similarly to step S515. Since the determination is YES in step S525, the system control unit 50 stops recording the moving image to protect the device or the image.

[0087] In step S527, the system control unit 50 displays the message "The camera will be turned off due to the temperature increase". Figure 6G An example of the display at this time is shown. In Figure 6G , information icons displayed in the camera standby state are shown. That is, the information 602 and 605a to 605d (information 612 in Figure 6G ) that were hidden during the recording of the moving image in the present exemplary embodiment are displayed again. Figure 6G The information 612 in Figure 7A is displayed again, so that the user can visually confirm the time in which the moving image can be recorded again. In step S527, "0 minutes" is displayed as in the information 612, so that the user can know that the recording of the moving image cannot be restarted in the current state. Further, the dialog box 614 is displayed on the LV image in an overlapped manner, and the message 613 is displayed in the dialog box 614. Since the determination in step S524 or S525 is "Yes", the temperature of the housing surface or the temperature inside the housing can reach a certain temperature, and it can affect the user or the device function can malfunction. To prevent these events, the system control unit 50 stops the recording of the moving image and notifies the user that the recording of the moving image has been stopped. In step S518, the system control unit 50 only needs to notify the user that the recording of the moving image has been stopped, notify the user of the reason for the stop, and return to the camera standby state. However, in the present step, the system control unit 50 notifies the user that the recording of the moving image has been stopped, and turns off the digital camera 100. This is because if the recording of the moving image is stopped due to the temperature, the most important thing is to reduce the temperature of the housing surface and inside as soon as possible. Therefore, the temperature can be quickly reduced by turning off the digital camera 100 (described below with reference to Figure 7A and 7B ). Therefore, the message as described above is displayed. In Figure 6G , the dialog box 614 is displayed in a large portion of the display region of the display unit 28. However, the present application is not limited to this. That is, the dialog box 614 can not be precisely superimposed on the LV image, or the dialog box 614 can be made smaller.

[0088] In step S528, the system control unit 50 determines whether a predetermined time has elapsed, similarly to step S519. If the predetermined time has elapsed (Yes in step S528), the processing proceeds to step S529. If not (No in step S528), the processing returns to step S528.

[0089] In step S529, the system control unit 50 turns off the digital camera 100, and the control flowchart in Fig. 5 ends (the processing proceeds to Figure 4S406). As described in step S527, if the recording of the moving image is stopped due to the temperature, the temperature of the housing surface and the inside drops faster by turning off the digital camera 100 than by switching to the imaging standby state. Therefore, the digital camera 100 is turned off in a state where there is no user operation. If the user performs an operation on the power switch 72, the digital camera 100 is turned off even if the predetermined time has not elapsed in step S528.

[0090] Figure 7A and Figure 7B is a graph regarding the temperature rise of the housing and the setting state of the moving image recording according to the present exemplary embodiment. Figure 7A Temperature rise curves in four states are shown. The curve 701 is a temperature rise curve in a case where the number of recording pixels is set to 8K. The curve 702 is a temperature rise curve in a case where the number of recording pixels is set to 4K. The curve 703 is a temperature rise curve in the imaging standby state. The curve 704 is a temperature rise curve in a mode other than the imaging mode (that is, the reproduction mode). The frame rate is set to be the same for the curves 701 and 702. If the frame rate is increased, more heat is released. That is, between 60 fps and 120 fps, more heat is released at 120 fps. In the curves 701 and 702, the time limit for the recording of the moving image is the same. The time limit is 10 seconds. The time limit is set to be the same in the curves 703 and 704. The time limit is 20 seconds. Figure 7A In the graph of, the horizontal axis represents time, and the vertical axis represents temperature. Figure 7A The graph in shows a temperature rise curve in a state where the digital camera 100 is turned on when the time is 0 seconds and the temperature of the housing surface is K0 [°C]. The temperature Kh [°C] is the same as the temperature used in the determination of step S525. That is, the temperature Kh [°C] is a temperature limit for protecting the device. The temperature K1 [°C] is a temperature limit used when the time limit is calculated in step S506. The time until the curve 701 reaches the temperature K1 [°C] is t1 [seconds]. The time until the curve 702 reaches the temperature K1 [°C] is t2 [seconds]. From the curves 703 and 704, it is understood that the temperature K1 [°C] is a temperature limit for protecting the device. Figure 7A It is understood from in that, after the digital camera 100 is turned on, the time until the recording of the moving image is possible is immediately t1 seconds when the 8K setting is used. The time until the recording of the moving image is possible is immediately t2 seconds when the 4K setting is used. However, this is only the time until the recording of the moving image is possible immediately after the digital camera 100 is turned on. The longer the imaging standby state continues after the digital camera 100 is turned on, the higher the temperature rise shown by the curve 703, and the shorter the time until the recording of the moving image is possible. Therefore, the time until the recording of the moving image is possible is shorter than the times t1 or t2 (described below with reference to FIG. 8). Figure 6A The information 605 in shows the time t1 at the position of the information 605. When the 4K setting is used, the time t2 is displayed. However, this is only the time until the recording of the moving image is possible immediately after the digital camera 100 is turned on. The longer the imaging standby state continues after the digital camera 100 is turned on, the higher the temperature rise shown by the curve 703, and the shorter the time until the recording of the moving image is possible. Therefore, the time until the recording of the moving image is possible is shorter than the times t1 or t2 (described below with reference to FIG. 8). Figure 7B

[0091] Figure 7B ​A graph corresponding to a state in which the digital camera 100 is turned on at time 0 seconds and the temperature of the surface of the casing is K0 [°C], and recording of a moving image is started at point A3 at time t2 elapsed in the imaging standby state, which is represented by the curve 703. At point A3, the temperature of the surface of the casing is K3. As described in Figure 7A immediately after the digital camera 100 is turned on, time t1 is displayed as the time during which a moving image can be recorded using the 8K setting. However, after time t2 has elapsed in the imaging standby state, the time during which a moving image can be recorded using the 8K setting is t3-t2, and the time during which a moving image can be recorded using the 4K setting is t4-t2 (t2 < t3 < t4). That is, even when a moving image is not being recorded and LV imaging is being performed, the temperature of the surface and the inside of the casing increases, and the time limit based on the temperature instantaneously becomes shorter. On the other hand, in the full high definition (FHD) setting or the high definition (HD) setting, less heat is generated than in the 8K setting or the 4K setting, and it is less likely to be temperature-limited. Therefore, with the FHD setting or the HD setting, even when the user waits for the imaging timing in the imaging standby state, the subsequent recording of a moving image is not greatly affected.

[0092] If the curves 701 and 702 reach points Al and A2, respectively, in Figure 7A the curves 701 and 702 reach points A4 and A5, respectively, in Figure 7B the surface and the inside of the casing are turned off as described above in steps S526 to S529, the temperature of the surface and the inside of the casing decreases. Each time the casing temperature decreases by 1 °C, the maximum recordable time is extended by about one minute. That is, in a case where the digital camera 100 is turned on by the user after the digital camera 100 is turned off in step S529, if the temperature of the casing decreases by 1 °C, the time limit is extended by about one minute. If the temperature of the casing decreases by 5 °C, the time limit is extended by about 5 minutes. However, if the digital camera 100 is turned off in a case where the determination in step S525 is "Yes", the time limit is not extended even if the temperature decreases by 1 °C, unless the temperature measured by the temperature sensor 91a decreases to K1 [°C] or less. This is because, even if the temperature is lower than Kh [°C], but K1 [°C] or more, the temperature of the surface of the casing can reach K1 [°C] or more, and it can affect the user. Therefore, if the digital camera 100 is turned off due to the temperature exceeding the temperature Kh [°C], recording of a moving image is not started even if a moving image recording instruction is issued, unless the temperature measured by the temperature sensor 91a decreases to the temperature Kw [°C] or less in step S504.

[0093] According to the present exemplary embodiment, in a case where the user attempts to record a moving image, the user can recognize how long a moving image can be recorded with the current settings before issuing a moving image recording instruction. In a case where heat is generated only by the digital camera 100 in the imaging standby state and the time during which a moving image can be recorded becomes short, the user easily makes any one of the following determinations.

[0094] • Whether the user can turn on the digital camera 100 before issuing a moving image recording instruction and wait for a recording timing in the imaging standby state.

[0095] • Whether the user should wait in a state where the digital camera 100 is turned off before issuing a moving image recording instruction, turn on the digital camera 100 slightly earlier than the user expects, and start recording a moving image.

[0096] Therefore, the inconvenience that the user cannot record a moving image as assumed or cannot continue recording a moving image to a desired timing can be avoided.

[0097] The various types of control performed by the system control unit 50 in the specification can be performed by a single hardware or can share the processing by a plurality of hardware (for example, a plurality of processors or circuits) so as to control the entire apparatus.

[0098] Although the present application has been described in detail based on appropriate exemplary embodiments thereof, the present application is not limited to these specific exemplary embodiments. The present application also includes various forms without departing from the spirit and scope of the present application. Furthermore, the above exemplary embodiments merely show exemplary embodiments of the present application, which can be appropriately combined together.

[0099] In the above exemplary embodiments, a case where the present application is applied to the digital camera 100 (electronic apparatus) as an example has been described. However, the present application is not limited to this example, and is applicable to any electronic apparatus capable of being connected to an imaging device including an imaging unit capable of recording a moving image. That is, the present application is applicable to a personal computer, an external monitor, a mobile telephone terminal, a mobile image viewer, a music player, or a game apparatus.

[0100] The present application is not only applicable to the camera body but also applicable to a control device that communicates with the camera (including a network camera) through wired or wireless communication and remotely controls the camera body. Examples of the device that remotely controls the camera include devices such as a smartphone, a tablet personal computer (PC), and a desktop PC. Based on an operation performed in the control device or a process performed in the control device, the control device transmits a command to perform various operations and make various settings to the camera, and thus the control device can remotely control the camera. In addition, the control device can receive a live view image captured by the camera via wired or wireless communication and display the live view image.

[0101] (Other exemplary embodiments)

[0102] The present application can also be realized by a process of providing software (a program) for realizing the functions of the above-described exemplary embodiments to a system or a device via a network or various storage media and causing a computer (or a central processing unit (CPU) or a processor) of the system or the device to read and execute the program code. In this case, the program and the storage medium storing the program constitute the present application.

[0103] According to the present application, the user can recognize the time during which the moving image can be recorded in the camera standby state.

[0104] Other embodiments

[0105] Embodiments of the present application can also be realized by a method of providing software (a program) for realizing the functions of the above-described embodiments to a system or a device via a network or various storage media and causing a computer or a central processing unit (CPU), a micro processing unit (MPU) of the system or the device to read and execute the program.

[0106] While the present application has been described with reference to exemplary embodiments, it is to be understood that the application is not limited to the disclosed exemplary embodiments. The scope of the claims shall be construed in the widest sense and encompass all the technical solutions falling within the ambit of the application.

[0107] This application claims priority from Japanese Patent Application No. 2020-048158 filed on March 18, 2020, the content of which is incorporated herein by reference in its entirety.

Claims

1. An electronic apparatus comprising: an acquisition unit configured to acquire a temperature of an image pickup device; and a calculation unit configured to calculate, based on the temperature acquired by the acquisition unit, a time limit for recording a moving image before the temperature of the image pickup device reaches a first temperature; and a control unit configured to, when the moving image recording mode is transitioned from a standby state in which a moving image is not recorded to a recording state in which a moving image is recorded, perform control to cause the calculation unit to calculate, based on the temperature of the image pickup device at the timing of the state transition and the first temperature, a time limit for the temperature of the image pickup device to reach the first temperature in the recording state in which a moving image is recorded, wherein, in the standby state, the control unit performs control to display, on a display unit, the time limit calculated by the calculation unit based on the temperature acquired by the acquisition unit at the start of the standby state, and to update the time limit based on the temperature acquired by the acquisition unit at the start of the standby state and an elapsed time without using the temperature of the image pickup device acquired at the time of updating the time limit, and to display, on the display unit, the updated time limit. 2.The electronic device of claim 1, wherein, The control unit performs control to display the time limit on the display unit together with a live view image being captured by an image pickup unit of the image pickup device. 3.The electronic device of claim 1, wherein, The calculation unit calculates the time limit based on the temperature acquired by the acquisition unit and a quality setting of the moving image to be recorded.

4. The electronic device of claim 1, wherein, In the recording state in which a moving image is recorded in the moving image recording mode, in response to the time limit displayed on the display unit in the standby state elapsing from the time at which the moving image starts to be recorded, the control unit performs control to stop recording the moving image.

5. The electronic device of claim 4, wherein, In a case where the recording of the moving image is stopped in response to the elapse of the time limit, the control unit performs control to display, on the display unit, a notification indicating that the recording of the moving image is stopped, and then to turn off the image pickup device in response to the elapse of a predetermined time.

6. The electronic device of claim 1, wherein, In the standby state, the control unit performs control to display, on the display unit, a shorter time between the time limit and a recordable time calculated based on a remaining capacity of a recording medium for recording a moving image.

7. The electronic device of claim 6, wherein, In a case where the recording of the moving image is stopped in response to the elapse of the recordable time, the control unit performs control to display, on the display unit, a notification indicating that the recording of the moving image is stopped, and then to transition to the standby state in response to a predetermined condition being satisfied.

8. The electronic device of claim 1, wherein, In a case where the standby state is transitioned to the recording state in which a moving image is recorded in response to a recording start instruction issued by a user, the control unit performs control to display, on the display unit, an elapsed time after the recording start instruction is issued as a recording time instead of the time limit displayed in the standby state.

9. The electronic device of claim 8, wherein, The control unit performs control to display the elapsed time displayed in the recording state in an incremental format. 10.The electronic device of claim 1, wherein, In a recording state in which a moving image is recorded, in response to a time obtained by subtracting an elapsed time from a time at which recording of the moving image is started from a time limit displayed in the standby state becoming less than or equal to a predetermined time, the control unit performs control to display a warning indicating that a time in which the moving image can be recorded is about to run out.

11. The electronic device according to claim 1, wherein The control unit calculates, as the time limit, a time until the temperature acquired by the acquisition unit reaches a first temperature, and In the recording state in which the moving image is recorded, in a case where the temperature acquired by the acquisition unit reaches a second temperature that is higher than the first temperature, the control unit performs control to stop recording of the moving image even if the time limit has not elapsed.

12. The electronic device of claim 11, wherein, The first temperature is 46°C.

13. The electronic device of claim 11, wherein, The second temperature is 80°C.

14. The electronic device of claim 1, wherein, In the standby state, in a case where the temperature acquired by the acquisition unit is a temperature that is lower than a third temperature that is lower than the first temperature, the control unit performs control to display, on the display unit, the recordable time between the time limit and a recordable time calculated based on a remaining capacity of a recording medium, regardless of the time limit.

15. The electronic device of claim 14, wherein, The third temperature is 15°C.

16. The electronic device of claim 1, wherein, In a case where the user issues an instruction to stop recording of the moving image, the control unit performs control to stop recording of the moving image even if the time limit has not elapsed.

17. The electronic device according to claim 1, the electronic device further comprising: an imaging unit; and a viewfinder, wherein the display unit is visually confirmed in the viewfinder, and wherein the acquisition unit acquires a temperature of an imaging device including the imaging unit.

18. The electronic device according to claim 1, wherein the display unit is provided in an electronic device different from an imaging device including the imaging unit, and wherein the acquisition unit acquires a temperature of an imaging device including the imaging unit.

19. The electronic device of claim 1, further comprising: a communication unit configured to communicate with the imaging device; wherein the control unit remotely controls the imaging device via the communication unit.

20. A control method of an electronic device, the control method comprising: acquiring a temperature of an imaging device; based on the acquired temperature, calculating a time limit for limiting a recording time of a moving image before a temperature of the imaging device reaches a first temperature; and when a recording state in which a moving image is recorded is transitioned from a standby state in which the moving image is not recorded, performing control to calculate, based on a temperature of the imaging device at the timing of the state transition and the first temperature, a time limit in which the temperature of the imaging device reaches the first temperature in the recording state in which the moving image is recorded, in the standby state, performing control to display, on a display unit, a time limit calculated based on a temperature acquired at the start of the standby state, and updating the time limit based on the temperature acquired at the start of the standby state and an elapsed time without using a temperature of the imaging device acquired at the time of updating the time limit, and performing control to display, on the display unit, the updated time limit.

21. A computer-readable storage medium storing a program causing a computer to execute a control method of an electronic device, the control method comprising: acquiring a temperature of an image pickup device; based on the acquired temperature, calculating a time limit for limiting a recording time for recording a moving image before the temperature of the image pickup device reaches a first temperature; and when transitioning from a standby state in which a moving image is not recorded to a recording state in which a moving image is recorded in a moving image recording mode, performing control to cause the temperature of the image pickup device at the time of the state transition and the first temperature to be based on the temperature of the image pickup device at the time of the state transition and the first temperature, calculate a time limit for the temperature of the image pickup device to reach the first temperature in the recording state in which a moving image is recorded, in the standby state, performing control to display on a display unit a time limit calculated based on a temperature acquired at the start of the standby state, and to update the time limit based on the temperature acquired at the start of the standby state and an elapsed time without using a temperature of the image pickup device acquired at the time of updating the time limit, and performing control to display the updated time limit on the display unit.

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