Display control device, display control method, program, storage medium

Abstract

To provide a display control device, a display control method, a program, and a storage medium that facilitate user determination of the degree of temperature risk of an electronic device.SOLUTION: The display control device has temperature acquiring means for acquiring information on a medium temperature, which is a temperature of a first recording medium attached to an electronic device and controlling means for controlling display means for displaying a time variation 501 of the medium temperature and an item indicating a first temperature 506 or a second temperature based on the first temperature but lower than the first temperature, which may limit certain operations of the electronic device when the medium temperature is reached.SELECTED DRAWING: Figure 5

Description

Technical Field

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

Background Art

[0002] Various recording media can be attached to electronic devices such as digital cameras. Further, the temperature of the recording medium may rise during shooting. When the temperature of the recording medium rises, there is a possibility that the recording element included in the recording medium may malfunction.

[0003] In Patent Document 1, a recordable bit rate is obtained based on identification information of a recording medium and temperature information acquired from the recording medium, and a warning indicating an increase in the temperature of the recording medium is given according to the recordable bit rate and the current set bit rate. According to this, when a bit rate at which the temperature of the recording medium may become high is set in the electronic device, a warning is given, so that the user can grasp the risk of temperature rise before or during video recording.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in Patent Document 1, only icons and warning messages are displayed, so there is a problem that it is difficult for the user to judge the degree of the temperature risk of the electronic device at the present time (for example, the time during which continuous shooting is allowed from the present time, the allowable temperature rise, etc.).

[0006] Therefore, an object of the present invention is to provide a technique that facilitates the user to judge the degree of the temperature risk of an electronic device.

Means for Solving the Problems

[0007] One aspect of the present invention is, A temperature acquisition means for acquiring information on the medium temperature, which is the temperature of a first recording medium attached to an electronic device, A control means that controls the display means to display a first item indicating a first temperature at which, if the medium temperature reaches, a particular operation of the electronic device may be restricted, a second item indicating a second temperature at which the particular operation has been restricted, and the time change of the medium temperature. to have death, The aforementioned specific operation is at least one of the following: recording, using the flash function, or using the high-quality shooting mode. This is a display control device characterized by the following features. [Effects of the Invention]

[0008] According to the present invention, it becomes easier for users to judge the degree of temperature risk in electronic devices. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram showing a digital camera according to Embodiment 1. [Figure 2] This is a diagram showing the configuration of a digital camera according to Embodiment 1. [Figure 3] This is a flowchart showing the processing of a digital camera according to Embodiment 1. [Figure 4] This is a diagram illustrating the support information related to Embodiment 1. [Figure 5] This figure shows a temperature graph according to Embodiment 1. [Figure 6] This figure shows a temperature graph according to Embodiment 2. [Figure 7] This is a flowchart showing the processing of a digital camera according to Embodiment 3. [Figure 8] This figure shows a temperature graph according to Embodiment 3. [Figure 9] This diagram illustrates a table for storing the recording stop temperature according to Embodiment 3. [Figure 10] It is a diagram showing the temperature graph according to Embodiment 4. [Figure 11] It is a flowchart showing the setting process of the notification temperature according to Embodiment 4. [Figure 12] It is a diagram explaining the user notification according to Embodiment 4. [Figure 13] It is a flowchart showing the notification process to the user according to Embodiment 4. [Figure 14] It is a diagram explaining the cooperation between the digital camera and the device according to Embodiment 5. [Figure 15] It is a flowchart showing the processing of the digital camera according to Embodiment 6. [Figure 16] It is a diagram showing the temperature graph according to Embodiment 6. [Figure 17] It is a diagram explaining the temperature recording information according to Embodiment 6. [Figure 18] It is a flowchart showing the processing of the digital camera according to Embodiment 7. [Figure 19] It is a diagram showing the graph list screen according to Embodiment 7. [Figure 20] It is a diagram showing the temperature glass according to Embodiment 7.

Embodiments for Carrying Out the Invention

[0010] <Embodiment 1> Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIGS. 1A and 1B show an external view of a digital camera 100 as an example of an apparatus to which the present invention is applicable. FIG. 1A is a front perspective view of the digital camera 100, and FIG. 1B is a rear perspective view of the digital camera 100. The display unit 28 is a display unit provided on the back of the camera that displays images and various information. The touch panel 70a is an operable member that can detect a touch operation on the display surface (operation surface) of the display unit 28. The finder external display unit 43 is a display unit provided on the upper surface of the camera, and displays various setting values of the camera such as the shutter speed and aperture.

[0011] The shutter button 61 is an operating part for giving shooting instructions. In still image shooting mode, the shutter button 61 is used to give instructions for preparing to shoot a still image and to take a picture, and in video shooting mode, it is used to give instructions for starting and stopping video recording. The mode selector switch 60 is an operating part for switching between various modes. The terminal cover 40 is a cover that protects the connector (not shown) that connects the connection cable to an external device to the digital camera 100. The main electronic dial 71 is a rotary operating member included in the operating unit 70. By rotating the main electronic dial 71, the user can change settings such as shutter speed and aperture. The power switch 72 is an operating member that switches the power of the digital camera 100 ON and OFF. The sub electronic dial 73 is a rotary operating member included in the operating unit 70. By operating the sub electronic dial 73, the user can move the selection frame and advance images. The cross key 74 is an operating member included in the operating unit 70 that has push buttons that can be pressed in four directions. The digital camera 100 can perform actions according to the direction in which the directional pad 74 is pressed. The SET button 75 is a push button included in the control unit 70. The SET button 75 is mainly used for confirming selection items. The video button 77 is used to instruct the start and stop of video recording. By pressing the AE lock button 78 and then the shutter button 61, the user can shoot with the AF position fixed, or shoot even in situations where AF is not possible.

[0012] The playback button 79 is included in the control unit 70 and is an operation button that switches between shooting mode and playback mode. When the playback button 79 is pressed during shooting mode, the camera switches to playback mode and the latest image among the images recorded on the recording medium 200 can be displayed on the display unit 28. The assign button 95 is included in the control unit 70 and is a button to which other functions can be assigned. In its initial state, the assign button 95 is a button that displays the status screen. It functions as follows. Other functions that can be assigned to the assign button 95 include changing settings or status related to video recording and playback, and starting video recording. In addition, it is possible to assign the function of displaying the status screen to other assign buttons besides the assign button 95.

[0013] The status screen is a multi-page screen that displays settings or status related to video recording and playback, the internal status of the digital camera, and other information.

[0014] The communication terminal 10 is a communication terminal for the digital camera 100 to communicate with the lens unit 150 (detachable), which will be described later. The eyepiece 16 is the eyepiece of the eyepiece viewfinder (a viewfinder that you look through). The user can view the image displayed on the EVF (Electric View Finder) 29 of the viewfinder display unit through the eyepiece 16. The cover 202 is the cover of the slot that houses the recording medium 200 and the battery. The grip 90 is a holding part shaped to be easy for the user to grip with their right hand when holding the digital camera 100. With the grip 90 held by the little finger, ring finger, and middle finger of the right hand, the shutter button 61 and the main electronic dial 71 are positioned so that they can be operated with the index finger of the right hand. Also, in the same position, the sub electronic dial 73 is positioned so that it can be operated with the thumb of the right hand.

[0015] The intake port 98 and exhaust port 99 are air passages for cooling the main unit. When the fan 92 in Figure 2 rotates, air flows from the intake port 98 to the exhaust port 99, allowing heat to be released from the digital camera 100 body. The digital camera 100 body is also equipped with a thermometer 93, which can measure the temperature of specific parts of the body. The digital camera 100 stops the fan 92 or changes its rotation speed depending on the measured temperature. Note that there may be multiple thermometers 93 and fans 92 in the digital camera 100.

[0016] LED47 is a light-emitting unit that can indicate specific states of the digital camera 100 by being lit, off, or blinking. These specific states can indicate whether the digital camera 100 is powered on or off, whether it is recording or not, whether it is accessing media or not, whether a system error has occurred or not, or whether the temperature of the digital camera 100 has reached a specified temperature or not.

[0017] Figure 2 is a block diagram showing an example configuration of the digital camera 100 according to this embodiment. The lens unit 150 is a lens unit equipped with an interchangeable photographic lens. The lens 103 is usually composed of multiple lenses, but here it is shown as a single 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 the communication terminal 6 and the communication terminal 10, and the internal lens system control circuit 4 controls the aperture 1 via the aperture drive circuit 2. Subsequently, the lens unit 150 focuses by displacing the lens 103 via the AF drive circuit 3.

[0018] The shutter 101 is a focal-plane shutter that allows the exposure time of the imaging unit 22 to be freely controlled by the system control unit 50.

[0019] The imaging unit 22 is an image sensor composed of a CCD or CMOS element that converts an optical image into an electrical signal. The A / D converter 23 is used to convert the analog signal output from the imaging unit 22 into a digital signal.

[0020] The image processing unit 24 performs resizing and color conversion processing, such as predetermined pixel interpolation and reduction, on the data from the A / D converter 23 or the data from the memory control unit 15 (described later). The image processing unit 24 also performs predetermined calculation processing using the captured image data. Image Processing Based on the calculation results obtained by unit 24, the system control unit 50 performs exposure control and distance measurement control. This enables TTL (through-the-lens) AF (autofocus), AE (automatic exposure), and EF (flash pre-flash) processing. The image processing unit 24 further performs predetermined calculations using the captured image data and performs TTL AWB (auto white balance) processing based on the obtained calculation results.

[0021] The memory control unit 15 controls the 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 to the memory 32 via the image processing unit 24 and the memory control unit 15, or directly via the memory control unit 15. The memory 32 stores image data obtained by the imaging unit 22 and converted into digital data by the A / D converter 23, as well as image data for display on the display unit 28 or EVF 29. The memory 32 has sufficient recording capacity to store a predetermined number of still images, a predetermined amount of video footage, and audio.

[0022] Furthermore, memory 32 also serves as memory for image display (video memory). Display image data written to memory 32 is transmitted to the display unit 28 or EVF 29 via the memory control unit 15. The display unit 28 and EVF 29 display information on a display device such as an LCD or organic EL display according to the signal from the memory control unit 15. Data that has been A / D converted by the A / D converter 23 and stored in memory 32 is sequentially transferred to the display unit 28 or EVF 29, and this data is displayed on the display unit 28 or EVF 29, thereby realizing live view display (LV display). Hereinafter, the image displayed in live view will be referred to as a live view image (LV image).

[0023] The compression unit 26 compresses the image data (time-sequential image data) stored in the memory 32 in a format such as MPEG to generate video data. The generated video data is stored in the memory 32 via the memory control unit 15. Subsequently, the video data stored in the memory 32 is multiplexed with audio also stored in the memory 32 and written to the recording medium 200 as a video file.

[0024] The external viewfinder display unit 43 displays various camera settings, including shutter speed and aperture, via the external viewfinder drive circuit 44.

[0025] The non-volatile memory 56 is an electrically erasable and recordable memory (storage unit), such as an EEPROM. Constants for the operation of the system control unit 50, programs, etc., are stored in the non-volatile memory 56. The program referred to here is a program for executing various flowcharts described later in this embodiment.

[0026] The system control unit 50 is a control unit consisting of at least one processor and / or at least one circuit, and controls the entire digital camera 100. The system control unit 50 realizes each of the processes of this embodiment, which will be described later, by executing a program recorded in the non-volatile memory 56. For example, RAM is used for the system memory 52. ​​The system memory 52 stores constants and variables for the operation of the system control unit 50, as well as the program read from the non-volatile memory 56. The system control unit 50 also performs display control by controlling the memory 32, the D / A converter 19, the display unit 28, etc.

[0027] The system timer 53 is a timekeeping unit that measures the time used for various controls and the time of the built-in clock.

[0028] The mode selector switch 60, the first shutter switch 62, the second shutter switch 64, and the operation unit 70 are operating members (operation) for inputting various operation instructions to the system control unit 50. The mode switch 60 switches the operating mode of the system control unit 50 to one of the following: still image recording mode, video recording mode, playback mode, etc. Modes included in the still image recording mode include auto shooting mode, auto scene detection mode, manual mode, aperture priority mode (Av mode), shutter speed priority mode (Tv mode), and program AE mode. Modes included in the still image recording mode include various scene modes and custom modes, which are shooting settings for different shooting scenes. The user can switch directly to any of these modes using the mode switch 60. Alternatively, the user may switch to the shooting mode list screen using the mode switch 60, select one of the displayed modes, and then switch using other operating components. Similarly, the video recording mode may also include multiple modes.

[0029] The first shutter switch 62 turns ON during the operation of the shutter button 61 on the digital camera 100, specifically when it is half-pressed (instructing the camera to prepare for shooting), and generates the first shutter switch signal SW1. In response to the generation of the first shutter switch signal SW1, the system control unit 50 starts operations such as AF (autofocus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, and EF (flash pre-flash) processing.

[0030] The second shutter switch 64 turns ON when the shutter button 61 is fully pressed (shooting instruction), generating the second shutter switch signal SW2. In response to the generation of the second shutter switch signal SW2, the system control unit 50 starts a series of shooting processes, from reading the signal from the imaging unit 22 to writing the image data to the recording medium 200.

[0031] Each operating element of the control unit 70 is assigned a function as appropriate for each situation by selecting various function icons displayed on the display unit 28, and acts as various function buttons. Examples of function buttons include an exit button, back button, image advance button, jump button, filter button, and attribute change button. For example, when the menu button is pressed, various configurable menu screens are displayed on the display unit 28. The user can intuitively make various settings using the menu screen displayed on the display unit 28 and the four directional buttons (up, down, left, and right) and the SET button.

[0032] The operation unit 70 consists of various operating components that act as an input unit for receiving user input. The operation unit 70 includes push buttons, rotary dials, touch sensors, etc., and includes at least the following operating components: shutter button 61, main electronic dial 71, power switch 72, sub electronic dial 73, directional pad 74, SET button 75, video button 77, AE lock button 78, playback button 79, and assign button 95.

[0033] The power control unit 80 consists of a battery detection circuit, a DC-DC converter, a switch circuit for switching which blocks are energized, and the like. The power control unit 80 detects whether a battery is installed, the type of battery, and the remaining battery level. The power control unit 80 also controls the DC-DC converter based on the detection results and instructions from the system control unit 50, supplying the necessary voltage to each part, including the recording medium 200, for the required period of time. The power supply unit 30 includes primary batteries (alkaline batteries, lithium batteries, etc.), secondary batteries (NiCd batteries, NiMH batteries, Li batteries, etc.), an AC adapter, and the like.

[0034] Interface 18 is an interface with a recording medium 200 such as a memory card or hard disk. Interface 18 has a function to detect the insertion or removal of the recording medium 200. Interface 18 also has a function to execute a Write command to the recording medium 200 when recording video, still images, or other data, and a function to execute a Read command to the recording medium 200 when reading video, still images, or other data. In this configuration, interface 18 has the function of acquiring current temperature information from the recording medium 200 using SMART (Self-Monitoring Analysis and Reporting Technology) commands. Furthermore, interface 18 has the function of acquiring recording medium information (manufacturer, model, part number, serial number, thermal throttling operating temperature, etc.) from the recording medium 200.

[0035] The thermal throttling operating temperature (TT operating temperature) is the temperature of the recording medium 200 at which the thermal throttling function begins. In other words, when the temperature of the recording medium 200 reaches the thermal throttling operating temperature (changes to above the thermal throttling operating temperature), the recording medium 200 executes the thermal throttling function. The thermal throttling function is a function that reduces the access speed to the recording medium 200 or stops access altogether to prevent recording element failure when the temperature of the recording medium 200 rises. The system control unit 50 can acquire information from the recording medium 200 and record information on the recording medium 200 by controlling the interface 18.

[0036] The recording medium 200 is a recording medium such as a memory card for recording captured images and video data. The recording medium 200 is composed of semiconductor memory, magnetic disks, etc. In particular, in this embodiment, the recording medium 200 is assumed to be a memory card such as an SD card, CFexpress card (CFexpress™ registered trademark), or CFast card (CFast™ registered trademark), but it may also be a recording medium such as an SSD or hard disk.

[0037] The communication unit 54 connects to external devices wirelessly or via wired cable to transmit and receive video and audio signals. The communication unit 54 can also connect to a wireless LAN (Local Area Network) or the internet. Furthermore, the communication unit 54 can communicate with external devices using Bluetooth® or Bluetooth Low Energy. The communication unit 54 can transmit images (including LV images) captured by the imaging unit 22 and images recorded on the recording medium 200, and can also receive images and other various information from external devices.

[0038] The attitude detection unit 55 detects the attitude of the digital camera 100 relative to the direction of gravity. Based on the attitude detected by the attitude detection unit 55, the system control unit 50 can determine whether the image captured by the imaging unit 22 was taken 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 the image according to the detected attitude and record it. An acceleration sensor or gyro sensor can be used in the attitude detection unit 55. The attitude detection unit 55 can also use an acceleration sensor or gyro sensor to detect the movement of the digital camera 100 (pan, tilt, lift, whether it is stationary or not, etc.).

[0039] The digital camera 100 also has a touch panel 70a as one of its operating units 70, which can detect contact with the display unit 28. The touch panel 70a and the display unit 28 can be configured as an integral unit. For example, the touch panel 70a is configured such that its light transmittance does not interfere with the display of the display unit 28, and is mounted on the upper layer of the display surface of the display unit 28. Then, the input coordinates on the touch panel 70a are associated with the display coordinates on the display screen of the display unit 28. This makes it possible to provide a GUI (Graphical User Interface) that makes it seem as if the user can directly operate the screen displayed on the display unit 28. The system control unit 50 can detect the following operations or states on the touch panel 70a. - A finger or pen that was not previously touching the touch panel 70a now touches the touch panel 70a. In other words, the start of a touch (hereinafter referred to as Touch-Down). The touch panel 70a is being touched with a finger or pen (hereinafter referred to as Touch-On). - The user is moving while touching the touch panel 70a with their finger or pen (hereinafter referred to as Touch-Move). • The finger or pen that was touching the touch panel 70a is lifted. In other words, the touch action ends (hereinafter referred to as Touch-Up). • The touch panel 70a is not being touched (hereinafter referred to as Touch-Off).

[0040] When a touchdown is detected, a touch-on state is also detected simultaneously. After a touchdown, a touch-on state is usually detected unless a touch-up is detected. If a touch move is detected, a touch-on state is also detected. On the other hand, even if a touch-on state is detected, a touch move will not be detected if the touch position has not moved. After all fingers or pens that were touching have been detected as having touched up, the touch-off state is activated.

[0041] These operations and states, as well as the position coordinates of the finger or pen touching the touch panel 70a, are notified to the system control unit 50 via the internal bus. Based on the notified information, the system control unit 50 determines what kind of touch operation was performed on the touch panel 70a. For touch moves, the direction of movement of the finger or pen moving on the touch panel 70a can also be determined for each vertical and horizontal component on the touch panel 70a based on the change in position coordinates. If a touch move of a predetermined distance or more is detected, it is determined that a slide operation was performed. An operation in which a finger is touched on the touch panel and quickly moved a certain distance, and then released, is called a flick. In other words, a flick is an operation in which the finger is quickly traced across the touch panel 70a as if flicking it. If a touch move of a predetermined distance or more at a predetermined speed or faster is detected, and a touch-up is detected immediately afterward, it can be determined that a flick was performed (it can be determined that a flick followed a slide operation).

[0042] Furthermore, touching multiple points (for example, two points) simultaneously to bring them closer together is called a pinch-in, and touching them further apart is called a pinch-out. Pinch-out and pinch-in are collectively referred to as a pinch operation (or simply a pinch).

[0043] The touch panel 70a may use any of the following types of touch panels: resistive, capacitive, surface acoustic wave, infrared, electromagnetic induction, image recognition, or optical sensor. The touch panel 70a may use either a method that detects a touch when there is contact with the touch panel or a method that detects a touch when a finger or pen approaches the touch panel.

[0044] Temperature sensors 93a to 93d are temperature sensors that measure the surface / internal / ambient temperature of the housing of the digital camera 100. Temperature sensors 93a to 93d are temperature acquisition units included in the thermometer 93. An example of the placement of each temperature sensor is shown in Figure 1C.

[0045] Figure 1C shows the digital camera 100 viewed from the display unit 28 side with the EVF 29 facing upwards. Temperature sensor 93a is a temperature sensor located near the imaging unit 22 and measures the temperature near the imaging unit 22 device. Temperature sensor 93b is a temperature sensor located around the connector protected by the terminal cover 40 and measures the temperature for calculating the temperature of the housing surface of the digital camera 100. Temperature sensor 93b is set to a relatively high temperature (a temperature lower than the limit temperature for device protection, specifically around 46 degrees Celsius) The housing surface becomes frosted, and this is used to prevent the user from suffering low-temperature burns while continuing to hold the grip portion 90 during shooting. Temperature sensor 93c is a temperature sensor located near the display unit 28 and measures the temperature near the device of the display unit 28. Temperature sensor 93d is a temperature sensor located inside the lid 202 and measures the temperature of the recording medium 200 (temperature near the recording medium 200). If each device becomes too hot (for example, above 80 degrees), the device may not function properly or the image quality may deteriorate, and temperature measurement is performed to prevent these problems. In this embodiment, four temperature sensors are placed near four devices, but the number and position of sensors are not limited to this.

[0046] Embodiment 1 describes the operation of a digital camera 100 equipped with a recording medium 200 that performs (activates) a thermal throttling function when its temperature rises. Here, if the recording medium 200 activates the thermal throttling function while the digital camera 100 is recording video to the recording medium 200, the video recording (shooting) will be interrupted (stopped).

[0047] [Regarding the process for determining the warning temperature] Figure 3A is a flowchart of the process for determining a warning temperature (a method for controlling the digital camera 100) to warn when the temperature of the recording medium 200 is close to a temperature that will restrict the operation of the digital camera 100. The process shown in the flowchart in Figure 3A can be started at any time as long as the recording medium 200 is installed in the digital camera 100. Furthermore, this flowchart is implemented by the system control unit 50 loading a program stored in the non-volatile memory 56 into the system memory 52 and executing it.

[0048] In S301, the system control unit 50 obtains media identification information (information indicating the type of recording medium 200) from the recording medium 200. The media identification information is information such as the manufacturer and model of the recording medium 200. In the following, the media identification information is assumed to be a string indicating the manufacturer name and model name, but it may also be abstract information such as a manufacturer ID or model ID.

[0049] In S302, the system control unit 50 acquires information on the thermal throttling operating temperature (TT operating temperature) from the recording medium 200. The thermal throttling operating temperature information is, for example, the MXTMT (Maximum Thermal Management Temperature) of the HCTM (Host Controlled Thermal Management) of the recording medium 200. The thermal throttling operating temperature information may be expressed in Celsius, Fahrenheit, or as temperature range information.

[0050] In S303, the system control unit 50 determines whether the recording medium 200 is a supported item (a recording medium supported by the digital camera 100). The system control unit 50 compares the support information 401, which indicates the media identification information of the supported item, with the media identification information obtained in S301 to determine whether the recording medium 200 is a supported item. If it is determined that the recording medium 200 is a supported item, the process proceeds to S304; otherwise, the processing of this flowchart ends.

[0051] Figure 4 shows an example of support information 401. Support information 401 is information pre-recorded in non-volatile memory 56. Support information 401 may be recorded in non-volatile memory 56 as a fixed value at the time of product manufacturing, or it may be updated from an initial value recorded in non-volatile memory 56 according to the use of the product (digital camera 100). For updating support information 401, for example, known deep learning techniques can be used.

[0052] Support information 401 includes manufacturer name 402 and model name 403 and warning temperature offset 40 Three pieces of information related to 4 are recorded and linked to each other. Support information 401 indicates that the recording medium of the model indicated by model name 403 from the manufacturer indicated by manufacturer name 402 is supported. Warning temperature offset 404 is information that shows the offset (difference) between the thermal throttling operating temperature and the warning temperature. The warning temperature offset 404 is predetermined based on the results of thermal and noise studies conducted during the design and development of the digital camera 100.

[0053] In the example in Figure 4, if manufacturer name 402 is company A and model name 403 is GOLD, the warning temperature offset 404 will be -1 degree (°C). If manufacturer name 402 is company A and model name 403 is SILVER, the warning temperature offset 404 will be -2 degrees. If manufacturer name 402 is company B, the warning temperature offset 404 will be -1 degree regardless of the model name. If manufacturer name 402 is company C, the warning temperature offset 404 will be 0 degrees regardless of the model name.

[0054] Then, in S303, the system control unit 50 determines that the recording medium 200 is a supported item if the manufacturer name and model name indicated by the media identification information acquired in S301 match the manufacturer name 402 and model name 403 in the support information 401. On the other hand, if the manufacturer name or model name in these two pieces of information do not match, the system control unit 50 determines that the recording medium 200 is not a supported item.

[0055] For example, support information 401 indicates that the recording medium is supported by Company B (manufacturer name 402) and an arbitrary name (model name 403). Therefore, if the manufacturer name indicated by the media identification information is Company B and the model name is BRONZE, then the manufacturer name and model name in the media identification information and support information 401 match.

[0056] In S304, the system control unit 50 determines the warning temperature based on the thermal throttling operating temperature information acquired in S302 and the warning temperature offset 404. Specifically, the system control unit 50 determines the warning temperature as the sum of the thermal throttling operating temperature and the warning temperature offset 404. For example, if the thermal throttling operating temperature is 100 degrees and the warning temperature offset 404 is -1 degree, the warning temperature is 99 degrees.

[0057] [Regarding graph display processing] Next, referring to Figure 3B, we will explain the process of displaying a temperature graph showing the temperature status (graph display process).

[0058] Figure 5 shows the temperature graph displayed on the display unit 28 in Embodiment 1. The temperature graph plots points indicating the medium temperature at each time point. Here, the medium temperature is the temperature of the recording medium 200. Specifically, the medium temperature is the temperature measured by the temperature sensor 93d, or the temperature measured by the recording medium 200 (temperature measuring unit of the recording medium 200).

[0059] In a temperature graph, the horizontal axis represents time, and the vertical axis represents temperature. The time at the origin of the graph is a past time, a predetermined number of hours prior to the current time. The dotted line 506 is a tick mark (item) indicating a warning temperature. The warning temperature does not necessarily have to be shown by a line; for example, it may be shown by a colored band representing the range from the warning temperature to the thermal throttling operating temperature.

[0060] Point 501 represents the medium temperature at each time point. By connecting points 501 with line segments, the temperature graph shows the change in medium temperature (time change) from past time points to the present time. Furthermore, the media temperature information is stored (recorded) in the memory 32 each time the graph display process shown in Figure 3B is repeated at regular intervals. Then, each time the media temperature information is acquired, the system control unit 50 adds a new point 501 to the temperature graph based on the current time obtained from the system timer 53 and the media temperature.

[0061] In this embodiment, the time interval for recording the medium temperature and the time interval for displaying the medium temperature are assumed to be the same. However, different time intervals may be used depending on the drive frequency of the thermometer 93, the operating frequency of the system control unit 50, etc.

[0062] The flowchart shown in Figure 3B starts at regular intervals when the "Display Temperature Status" setting, which displays the temperature graph, is enabled. At the start of this flowchart's process, the temperature graph showing the medium temperature at past time points is displayed on the display unit 28. This flowchart's process is realized when the system control unit 50 loads the program stored in the non-volatile memory 56 into the system memory 52 and executes it.

[0063] In S311, the system control unit 50 acquires information on the current temperature of the medium. The system control unit 50 also acquires information on the current time from the system timer 53. The system control unit 50 stores the information on the medium temperature and the current time together in the memory 32.

[0064] In S312, the system control unit 50 adds a point 501 to the temperature graph that represents the current time, based on the medium temperature information and current time information acquired in S311. In other words, the system control unit 50 adds (generates) a new point 501 to the temperature graph where the horizontal axis represents the current time and the vertical axis represents the medium temperature. The system control unit 50 also connects the newly added point 501 to the point 501 that represents the past time closest to the current time with a line.

[0065] In S313, the system control unit 50 determines, similar to S303, whether the recording medium 200 is a supported object. If it is determined that the recording medium 200 is a supported object, the process proceeds to S314; otherwise, the processing of this flowchart ends. According to S313, if the recording medium 200 is not a supported object, the dotted line 506 indicating the warning temperature is not displayed.

[0066] In S314, the system control unit 50 notifies (displays) the warning temperature. Specifically, the system control unit 50 generates a dotted line 506 on the temperature graph that indicates the warning temperature calculated in S304. At this time, the system control unit 50 may adjust the position of point 501 so that the position of the dotted line 506 indicating the warning temperature on the temperature graph (display unit 28) remains constant, regardless of the numerical value of the warning temperature (whatever the numerical value of the warning temperature may be).

[0067] According to this embodiment, the user can check how much margin the current media temperature has before reaching the warning temperature by looking at the temperature graph. Therefore, the user can easily choose whether to start the video recording process or to postpone it (to cool the digital camera 100 and the recording medium 200). In addition, since the warning temperature corresponding to the media identification information of the recording medium 200 is displayed, the user can accurately estimate the time until the risk of the digital camera 100's operation being restricted due to high temperature is eliminated.

[0068] Furthermore, each time the system control unit 50 acquires information on the media temperature, it compares the warning temperature with the current media temperature, and if the current media temperature exceeds the warning temperature, the digital camera 1 The system control unit 50 may notify (warn) the user that the temperature is high. This can be achieved, for example, by displaying an icon (item) on the display unit 28 that notifies the user that the temperature is approaching the warning temperature (that the difference between the thermal throttling operating temperature and the medium temperature is below a predetermined temperature). Alternatively, the system control unit 50 may display the thermal throttling operating temperature using a scale instead of (or along with) the warning temperature. Furthermore, the warning temperature only needs to be a temperature lower than the thermal throttling operating temperature (or the same temperature as the thermal throttling operating temperature), based on the thermal throttling operating temperature. For this reason, the warning temperature may be a predetermined multiple of the thermal throttling operating temperature (for example, any of 0.8 to 0.95 times).

[0069] <Embodiment 2> In Embodiment 2, instead of a warning temperature, the digital camera 100 displays a scale line indicating the media temperature at which the digital camera 100 most recently stopped recording video due to a rise in media temperature (recording stop temperature), along with the change in media temperature (change over time). Since the recording stop temperature is the media temperature at which video recording actually stopped due to a rise in media temperature, it can be said that this is the temperature at which video recording may stop if the media temperature rises in the future.

[0070] Figure 6 shows the temperature graph 600 displayed on the display unit 28 in Embodiment 2. The temperature graph 600 is a graph that displays the change in medium temperature (change over time) and items indicating the equipment status (operating status bar 602, warning message 604). In the temperature graph 600, the horizontal axis represents time and the vertical axis represents temperature. The time at the origin of the graph is a past time x' obtained by going back a predetermined amount of time from the current time.

[0071] The operating status bar 602 represents the change in the operating status (device status) of the video recording of the digital camera 100. The solid line 603 indicates the recording stop temperature, which is the temperature of the recording medium 200 at time x2 when video recording stopped due to a rise in temperature of the recording medium 200.

[0072] When video recording stops due to a rise in the temperature of the recording medium 200, the system control unit 50 displays a warning message 604 along with a solid line 603 indicating the recording stop temperature. The system control unit 50 continues to display the warning message 604 until the button 605 is pressed by the user.

[0073] According to Embodiment 2, when video recording stops due to a rise in the temperature of the recording medium 200, a solid line 603 indicating the recording stop temperature is displayed, allowing the user to understand whether the medium temperature has dropped to a temperature at which video recording for the desired duration can be performed. Furthermore, when attempting to record video again, the user can understand to what extent the medium temperature needs to rise before video recording may stop.

[0074] <Embodiment 3> In Embodiment 3, the digital camera 100 displays a temperature graph showing the change in media temperature (change over time) and the recording stop temperature, similar to Embodiment 2. Here, in Embodiment 3, unlike Embodiment 2, the display process of the temperature graph of the digital camera 100, which can be fitted with multiple recording media 200, will be described.

[0075] Referring to the flowchart shown in Figure 7, the temperature graph display process according to Embodiment 3 will be described. The process shown in this flowchart is realized when the system control unit 50 loads the program stored in the non-volatile memory 56 into the system memory 52 and executes it.

[0076] Figure 8 shows a temperature graph 800 according to Embodiment 3. In Figure 8, the recording when multiple recording media 200 (recording media 200A, 200B) are attached to the digital camera 100. This diagram illustrates an example of displaying the stop temperature. The solid line 801 (scale line) indicating the recording stop temperature is displayed at the position indicating the recording stop temperature of recording medium 200A, which is the main recording video storage location (main recording medium; first type of recording medium). The dotted line 802 (scale line) indicating the recording stop temperature is displayed at the position indicating the recording stop temperature of recording medium 200B, which is the sub-recording video storage location (sub-recording medium; second type of recording medium).

[0077] In this way, the digital camera 100 uses solid and dotted lines to distinguish between the recording stop temperature of the main recording medium, recording medium 200A, and the recording stop temperature of the sub-recording medium, recording medium 200B. Here, the scale lines indicating the recording stop temperature of recording medium 200A and the scale lines indicating the recording stop temperature of recording medium 200B may be distinguished by arbitrarily different display forms (such as line color, line thickness, or whether or not to use multiple lines).

[0078] The flowchart shown in Figure 7 is executed whenever the system control unit 50 detects that a new recording medium 200 has been mounted to the digital camera 100, while the "Display of Temperature Status" is enabled. In other words, if multiple recording media 200 are mounted to the digital camera 100, the flowchart shown in Figure 7 is executed for each of the multiple recording media 200. The following describes the processing of this flowchart when it is detected that a recording medium 200C has been mounted to the digital camera 100.

[0079] In S701, the system control unit 50 obtains manufacturer information and individual identification information (a unique number for each recording medium) from the recording medium 200C via the interface 18.

[0080] In S702, the system control unit 50 determines whether the recording medium 200C is a previously stopped medium (a recording medium that was installed in the digital camera 100 when video recording stopped in the past due to a rise in the temperature of the recording medium). Specifically, the system control unit 50 determines whether the individual identification information obtained in S701 matches the individual identification information of the previously stopped medium. The individual identification information of the previously stopped medium is stored in the non-volatile memory 56 beforehand. If it is determined that the two sets of individual identification information match, the process proceeds to S704; otherwise, it proceeds to S703.

[0081] For example, a table 901, which shows combinations of individual identification information of previously stopped media and the recording stop temperature at which video recording to the previously stopped media stopped, is stored in the non-volatile memory 56, as shown in Figure 9A. If the system control unit 50 finds individual identification information in table 901 that is the same as the individual identification information obtained in S701, it can determine that the individual identification information obtained in S701 and the individual identification information of the previously stopped media match.

[0082] In S703, the system control unit 50 determines whether the manufacturer of the recording medium 200C is the same as the manufacturer of a previously stopped medium that is different from the recording medium 200C. Specifically, the system control unit 50 determines whether the manufacturer name obtained in S701 matches the manufacturer name of a previously stopped medium. The manufacturer names of previously stopped mediums are stored in the non-volatile memory 56 beforehand. If it is determined that the two manufacturer names match, the process proceeds to S704; otherwise, it proceeds to S710.

[0083] For example, a table 902, shown in Figure 9B, is stored in the non-volatile memory 56, which shows combinations of the manufacturer name of a previously stopped medium and the recording stop temperature at which video recording to the previously stopped medium stopped. The system control unit 50 can determine that the manufacturer name obtained in S701 and the manufacturer name of the previously stopped medium match if the same manufacturer name is found in Table 902.

[0084] The data in Tables 901 and 902 are updated when video recording stops due to a rise in the temperature of the recording medium (S715). The data in Tables 901 and 902 remain in the non-volatile memory 56 until a reset operation is performed, in which the various settings of the digital camera 100 are initialized.

[0085] In S704, if the recording medium 200C is a previously stopped medium, the system control unit 50 obtains information on the recording stop temperature corresponding to the individual identification information of the recording medium 200C from Table 901. Also, if the manufacturer of the recording medium 200C is the same as the manufacturer of the previously stopped medium, the system control unit 50 obtains information on the recording stop temperature corresponding to the manufacturer name of the recording medium 200C from Table 902.

[0086] In S705, the system control unit 50 determines whether the recording medium 200C is the main recording medium. If it is determined that the recording medium 200C is the main recording medium, the process proceeds to S706; otherwise (if it is determined that the recording medium 200C is a sub-recording medium), the process proceeds to S707.

[0087] In S706, the system control unit 50 displays the red solid line indicating the recording stop temperature acquired in S704 or S715 as a solid line indicating the recording stop temperature of the main recording medium on the temperature graph.

[0088] In S707, the system control unit 50 displays the red dotted line indicating the recording stop temperature acquired in S704 or S715 as a dotted line indicating the recording stop temperature of the sub-recording medium on the temperature graph.

[0089] In S708, the system control unit 50 determines whether the recording medium 200C has been removed from the digital camera 100. If it is determined that the recording medium 200C has been removed from the digital camera 100, the process proceeds to S709; otherwise, it proceeds to S710.

[0090] In S709, the system control unit 50 hides the line indicating the recording stop temperature displayed on the temperature graph in S706 or S707. If the removed recording medium 200C is the main recording medium, the system control unit 50 hides the solid line indicating the recording stop temperature of the main recording medium. If the removed recording medium 200C is a sub-recording medium, the system control unit 50 hides the dotted line indicating the recording stop temperature of the sub-recording medium.

[0091] In S710, the system control unit 50 determines whether the digital camera 100 has started recording video onto the recording medium 200C (video recording). If it is determined that video recording has started, the process proceeds to S711; otherwise, it proceeds to S708.

[0092] In S711, the system control unit 50 determines whether video recording has stopped due to an error during video recording (not due to user operation). If it is determined that video recording has stopped due to an error during video recording, the process proceeds to S712; otherwise, it proceeds to S716.

[0093] In S712, the system control unit 50 determines whether the error that occurred when video recording stopped was a buffer overflow error (an error caused by a buffer overflow). If it is determined that the error occurred was a buffer overflow error, the system proceeds to S713; otherwise, it proceeds to S708.

[0094] In S713, the system control unit 50 acquires information on the medium temperature of the recording medium 200C. The system control unit 50 then determines whether the media temperature of the recording medium 200C exceeds the temperature threshold corresponding to the manufacturer of the recording medium 200C (a temperature threshold set in advance for each manufacturer). If it is determined that the media temperature of the recording medium 200C exceeds the temperature threshold, the process proceeds to S715; otherwise (if it is determined that the media temperature of the recording medium 200C is below the temperature threshold), the process proceeds to S714.

[0095] In S714, the system control unit 50 determines whether the writing speed of the recording medium 200C has decreased. 10 If the write speed of the recording medium 200C immediately before the video recording stops due to an error is slower than the write speed of the recording medium 200C at the start of video recording, it is determined that the write speed of the recording medium 200C has decreased. The system control unit 50 measures the write speed at the same time as writing to the recording medium 200C during video recording. The measured write speed information is stored in the system memory 52. ​​If it is determined that the write speed of the recording medium 200C has decreased, the process proceeds to S715; otherwise, it proceeds to S708.

[0096] In step S715, the system control unit 50 acquires the recording medium temperature information of the recording medium 200C at the time the video recording stopped due to an error, as the recording stop temperature information. The system control unit 50 then links the individual identification information of the recording medium 200C with the recording stop temperature information and records it in Table 901 shown in Figure 9A. The system control unit 50 also links the manufacturer name of the recording medium 200C with the recording stop temperature information and records it in Table 902 shown in Figure 9B.

[0097] Furthermore, if the manufacturer name of the recording medium 200C already exists in Table 902, the system control unit 50 updates the recording stop temperature information stored in Table 902 associated with that manufacturer name with the newly acquired recording stop temperature information. This is also the case if individual identification information for the recording medium 200C already exists in Table 901. In other words, each time video recording stops due to a rise in temperature, the information in Tables 901 and 902 is updated, so that Tables 901 and 902 can hold the most recently acquired recording stop temperature information. For example, if the manufacturer name of the recording medium 200C already exists in Table 902, the information in Table 902 may be updated only if the recording stop temperature associated with that manufacturer name in Table 902 is higher than the newly acquired recording stop temperature. This is also the case for Table 901. According to this, Tables 901 and 902 can retain the information of the lowest media temperature among the media temperatures at the time video recording stops due to a rise in temperature as the recording stop temperature information. Therefore, if a scale line indicating the recording stop temperature is displayed on the temperature graph, the user can know the minimum media temperature at which video recording may stop due to temperature rise. In addition, the system control unit 50 may store the average or median media temperature at which video recording stopped due to temperature rise in the past as the recording stop temperature for each manufacturer name (individual identification information) in Tables 901 and 902. This makes it possible to suppress large fluctuations in the recording stop temperature due to variations in media temperature at the time of video recording stop (when a specific operation is restricted).

[0098] In steps S712 to S714, the system control unit 50 determines whether video recording has stopped due to a rise in the temperature of the recording medium 200C. Specifically, the system control unit 50 determines that video recording has stopped due to a rise in the temperature of the recording medium 200C if the error that occurred is caused by a buffer overflow and the medium temperature exceeds the temperature threshold. Alternatively, the system control unit 50 determines that video recording has stopped due to a rise in the temperature of the recording medium 200C if the error that occurred is caused by a buffer overflow and the writing speed of the recording medium 200C has decreased. Only if it is determined that video recording has stopped due to a rise in the temperature of the recording medium 200C is the recording stop temperature information acquired and recorded (updated) in S715.

[0099] In S716, the system control unit 50 determines whether video recording has stopped due to user operation (without error). If it is determined that video recording has stopped due to user operation, the process proceeds to S708; otherwise, it proceeds to S711.

[0100] According to this embodiment, the media temperature at the time video recording was most recently stopped due to a rise in media temperature is displayed, allowing the user to more accurately understand the media temperature at which video recording may stop. Therefore, the user can more accurately predict when video recording will stop due to a rise in media temperature.

[0101] <Embodiment 4> Embodiment 4 describes a digital camera 100 that notifies the user when the media temperature falls below a temperature set by the user (notification temperature). According to Embodiment 4, for example, if the user stops video recording and leaves the recording medium 200 recording to lower its temperature after the media temperature has risen above the recording stop temperature, the user can be notified at an appropriate time that the media temperature has dropped. Therefore, the user can immediately start video recording again.

[0102] [Notification temperature setting process] First, let's explain the process by which the digital camera 100 sets the notification temperature. Figure 10 shows the contents of the temperature graph 600 shown in Figure 6, as well as a temperature graph 1000 in which the user can set the notification temperature.

[0103] The selection message 1004 is displayed when the user selects (touches) any position on the temperature graph 1000. The selection message 1004 is a message that allows the user to choose whether or not to set the temperature indicated by the selected position as the notification temperature. The user can choose whether or not to set the temperature indicated by the selected position as the notification temperature by selecting (touching) the YES button 1005 or the NO button 1006. The dashed line 1007 is a scale line that indicates the notification temperature set by the user. The line indicating the notification temperature is not limited to a dashed line and may be displayed in any form (solid line, any color, any thickness, multiple lines).

[0104] The process of setting the notification temperature will be explained according to the flowchart in Figure 11. This flowchart starts when "Display Temperature Status" is enabled. The process in this flowchart is realized when the system control unit 50 loads the program stored in the non-volatile memory 56 into the system memory 52 and executes it.

[0105] In S1101, the system control unit 50 displays the temperature graph 1000 in a state where the selection message 1004 is not displayed. The system control unit 50 may, for example, display on the display unit 28 a scale line indicating the "recording stop temperature" instead of the "warning temperature," and a broken line indicating the change in the medium temperature, based on the processing of the flowcharts shown in Figures 3A and 3B.

[0106] In S1102, the system control unit 50 determines whether a user operation (for example, touching the touch panel 70a) has been performed to select an arbitrary position on the temperature graph 1000. If it is determined that a user operation to select an arbitrary position has been performed, the process proceeds to S1103; otherwise, the process in S1102 is repeated.

[0107] In S1103, the system control unit 50 displays a selection message 1004 to indicate the position selected by the user operation.

[0108] In S1104, the system control unit 50 determines whether the YES button 1005 has been selected (touched) by the user. If so, proceed to S1105; otherwise, proceed to S1106.

[0109] In S1105, the system control unit 50 displays a scale line parallel to the horizontal axis, including the position selected by the user. This scale line is a dashed line 1007 representing the notification temperature.

[0110] In S1106, the system control unit 50 determines whether the NO button 1006 has been selected (touched) by the user. If it is determined that the NO button 1006 has been selected, the system proceeds to step S1108; otherwise, it proceeds to step S1104.

[0111] In S1107, the system control unit 50 stores (records) the temperature information corresponding to the location selected by the user as notification temperature information in the system memory 52. ​​In other words, the system control unit 50 acquires the notification temperature information set by the user and stores it in the system memory 52. ​​If notification temperature information is already stored in the system memory 52, the stored notification temperature information is updated with the temperature information corresponding to the location selected by the user.

[0112] In S1108, the system control unit 50 hides the selection message 1004.

[0113] [Notification process to the user] Next, we will explain the process of notifying the user when the media temperature changes to or below the notification temperature (when the media temperature reaches the notification temperature). Figure 12A is a diagram showing an example of notifying the user using a notification message when the media temperature changes to or below the notification temperature. Screen 1201 is the screen displayed on the display unit 28 when taking a picture.

[0114] Notification message 1202 is displayed when the media temperature changes to below the specified temperature. Notification message 1202 remains displayed on screen 1201 until the OK button 1203 is selected. In the example in Figure 12A, notification message 1202 shows the string "The device temperature has reached the specified temperature."

[0115] Figure 12B shows an example of notifying the user without using notification message 1202 when the media temperature changes to below the notification temperature. The digital camera 100 can notify the user that the media temperature has changed to below the notification temperature using LED 47 when the display unit 28 is unavailable for any reason (for example, when the display unit 28 is turned off). LED 47 notifies the user that the media temperature has changed to below the notification temperature by lighting up, blinking, etc.

[0116] The following describes the process of the digital camera 100 that notifies when the medium temperature has changed to below the notification temperature, referring to the flowchart shown in Figure 13. The process in the flowchart of Figure 13 is repeatedly executed at regular intervals by the system control unit 50 based on the time information notified by the system timer 53. This process in the flowchart is realized by the system control unit 50 loading the program stored in the non-volatile memory 56 into the system memory 52 and executing it.

[0117] In S1301, the system control unit 50 determines whether or not notification temperature information is stored (recorded) in the system memory 52. ​​If it is determined that notification temperature information is stored in the system memory 52, the process proceeds to S1302; otherwise, the process in this flowchart ends.

[0118] In S1302, the system control unit 50 acquires information on the medium temperature.

[0119] In S1303, the system control unit 50 determines whether the medium temperature is below the notification temperature (i.e., whether the medium temperature has changed to below the notification temperature). If it is determined that the medium temperature is below the notification temperature, the process proceeds to S1304; otherwise, the process in this flowchart ends.

[0120] In S1304, the system control unit 50 determines whether the display unit 28 is lit or not. The display unit 28 is not lit if the digital camera 100 is powered off, the display unit 28 is turned off due to menu settings, or the display unit 28 is closed and the screen is not visible to the user. If it is determined that the display unit 28 is lit, the process proceeds to S1305; otherwise, the process proceeds to S1306.

[0121] In S1305, the system control unit 50 displays the notification message 1202 on the display unit 28.

[0122] In S1306, the system control unit 50 lights up the LED 47 for a predetermined period of time. The system control unit 50 may also blink the LED 47 (it may repeatedly switch between lighting and turning the LED 47 on and off). Alternatively, instead of using the LED 47, the digital camera 100 may notify the user that the medium temperature has fallen below the notification temperature by emitting a specific sound.

[0123] In S1307, the system control unit 50 determines whether the user has selected the OK button 1203. If it is determined that the OK button 1203 has been selected, the process proceeds to S1308; otherwise, the process in S1307 is repeated (the notification message 1202 continues to be displayed).

[0124] In S1308, the system control unit 50 hides the notification message 1202.

[0125] In S1309, the system control unit 50 erases the notification temperature information stored (recorded) in the system memory 52.

[0126] According to Embodiment 4, the user can know when the media temperature has fallen below the notification temperature without having to continuously monitor the temperature graph. In addition, the digital camera 100 notifies the user using the LED 47 when the display unit 28 is not lit. This makes it possible for the user to both lower the media temperature by not illuminating the display unit 28 and to know when the media temperature has fallen below the notification temperature. In other words, lowering the media temperature can be accelerated by not illuminating the display unit 28.

[0127] <Embodiment 5> Embodiment 5 describes a solid line 603 that indicates the recording stop temperature, and a device 1403 that displays changes in other temperatures (over time) along with changes in the media temperature (over time).

[0128] Figure 14A shows how to link (communicate) a digital camera 100 of any of Embodiments 1 to 4 with a device 1403. Device 1403 is a device (display control device; control device; information processing device) that can link with the digital camera 100. Device 1403 is, for example, a smartphone or a PC. Device 1403 may have a configuration similar to that of the digital camera 100 in some respects.

[0129] Network 1402 is used to connect the digital camera 100 and device 1403. The network used is a wireless network compliant with wireless communication standards such as Bluetooth, Wi-Fi (registered trademark), 4G, or 5G. Network 1402 may also be a network that enables wired connection (wired communication) using USB (Universal Serial Bus).

[0130] The temperature graph 1404 is a temperature graph that can be displayed on the device 1403. The device 1403 can receive various information (such as media temperature information, recording stop temperature information, manufacturer name of recording medium 200, and individual identification information) from the digital camera 100 via the network 1402. In the temperature graph 1404, the vertical axis represents temperature and the horizontal axis represents time. Although the temperature graph 1404 is displayed on the device 1403, it may also be displayed on the display unit 28 of the digital camera 100.

[0131] Line 1405 shows the change in media temperature (temperature of the recording medium 200 mounted in the digital camera 100). Line 1406 shows the change in ambient temperature based on ambient temperature information acquired by device 1403. The time positions plotted in line 1406 may be the same as or different from the time positions plotted in line 1405. Tag 1407 indicates the date and time when the temperatures shown in line 1405 and line 1406 were measured. Tag 1408 indicates the manufacturer name and individual identification information of the recording medium 200 based on information received from the digital camera 100. Temperature graphs 1404 may be generated for each date, time period (hour), manufacturer name of the recording medium 200, and individual identification information.

[0132] According to Embodiment 5, since the change in ambient temperature is displayed along with the change in media temperature, the user can understand the influence of ambient temperature on the change in media temperature. For example, by referring to the temperature graph, the user can determine that if the ambient temperature is below a predetermined temperature, the media temperature has not reached the recording stop temperature in the past, and there is little concern about the video recording stopping due to a rise in the temperature of the recording medium 200.

[0133] <Embodiment 6> Embodiment 6 describes a digital camera 100 that displays a temperature graph for a specific period of device condition when the "Display Temperature Status" setting, which displays a temperature graph, is enabled, with reference to the flowchart shown in Figure 15. In this case, the digital camera 100 does not display a temperature graph for periods when the device is not in a specific condition.

[0134] Figure 16 shows the temperature graph displayed in Embodiment 6. The temperature graph plots the medium temperature at each time point. The horizontal axis represents time, and the vertical axis represents temperature. The line graph represents the change in medium temperature (change over time).

[0135] For example, points 1601 to 1605 represent the medium temperature measured at times x1, x2, x3, x4, and x5, respectively. Line 1608 is the line connecting the points that represent the plotted medium temperature.

[0136] The dashed line 1606, which indicates the operating limit temperature, is a scale line that shows the media temperature at which operating restrictions (operational restrictions to ensure user safety and prevent malfunction of the digital camera 100 when the media temperature becomes too high) are imposed. In the following, the operating restriction is assumed to be the cessation of recording, but it may also be the cessation of the flash function or the restriction of the use of high-quality shooting mode.

[0137] The dotted line 1607 indicating the warning temperature represents a temperature lower than the operating limit temperature and within a predetermined temperature difference from the operating limit temperature. If the current media temperature exceeds the warning temperature, the digital camera 100 may notify the user that the media temperature is approaching the operating limit temperature (i.e., the difference between the operating limit temperature and the media temperature is less than a predetermined temperature difference). For example... Alternatively, the digital camera 100 may display an icon (item) on the display unit 28 to notify the user that the media temperature is approaching the operating limit temperature. Furthermore, the warning temperature may be displayed not as a line indicating only one temperature, but as a band with a predetermined temperature width.

[0138] The digital camera 100 may set a warning temperature at which continuous shooting can be performed for a longer period than the user anticipates, even after the media temperature has reached the warning temperature, based on the rate at which the media temperature rises during video recording.

[0139] Figure 17 shows an example of some temperature recording information that illustrates the recorded correspondence between media temperature, equipment status, and time. The temperature recording information is periodically updated by the system control unit 50 and stored in the memory 32. The equipment status in the temperature recording information indicates either the recording standby state (preparation state for recording video) or the video recording state (state in which video is being recorded).

[0140] The user starts video recording by operating the control unit 70. When video recording starts, the device status of the digital camera 100 changes to video recording mode. In video recording mode, images generated by the image processing unit 24 are recorded on the recording medium 200.

[0141] Furthermore, the time in the temperature recording information indicates the time when the media temperature information and equipment status information were acquired (the measurement time of the media recording). By recording the media temperature information and video recording status information in conjunction with the time information, it becomes possible to display the temperature graph shown in Figure 16.

[0142] In this embodiment, the number of correspondences (combinations of media temperature, video recording status, and time) that can be stored for the temperature recording information is set to 100, and the temperature recording information is updated every minute. However, the number of correspondences that can be stored for the temperature recording information is not limited to this, and may be any number. Also, although the update interval for the temperature recording information is set to one minute, it may be in seconds or hours, and this update interval may be set by the user.

[0143] The system control unit 50 loads the temperature recording information into the memory 32. However, since the temperature recording information is stored in the non-volatile memory 56, the digital camera 100 may retain the temperature recording information even when it is started up again.

[0144] The flowchart shown in Figure 15 begins with power supplied from the power supply unit 30 and the system control unit 50 starting up. The processing in this flowchart is achieved when the system control unit 50 loads the program stored in the non-volatile memory 56 into the system memory 52 and executes it.

[0145] In S1501, the system control unit 50 records the current time information and the current time information of the digital camera 100. Specifically, the system control unit 50 associates the acquired media temperature information and the current time information and stores them in the temperature recording information.

[0146] In S1502, the system control unit 50 determines whether the current media temperature is below the operating limit temperature. If it is determined that the media temperature is below the operating limit temperature, the process proceeds to S1503; otherwise (if it is determined that the media temperature is above the operating limit temperature), the process proceeds to S1504.

[0147] In S1503, if the system control unit 50 has restricted the operation of the digital camera 100 (stopped video recording), it releases the restriction.

[0148] In S1504, the system control unit 50, if the operation restriction of the digital camera 100 has been released, executes the operation restriction. When the operation restriction is executed, video recording stops. .

[0149] In S1505, the system control unit 50 stores information about the current state of the digital camera 100 (video recording state or recording standby state) in the temperature recording information.

[0150] In S1506, the system control unit 50 determines whether the "display of temperature status" is enabled. If it is determined that the "display of temperature status" is enabled, the system proceeds to S1508; otherwise, it proceeds to S1507.

[0151] The system control unit 50 may determine whether the media temperature has reached the operating limit temperature, rather than whether the "temperature status display" is enabled. It may also determine whether the media temperature has reached a predetermined temperature, or whether the system is set to a cooling mode that prioritizes cooling the digital camera 100. In other words, the system may proceed to S1508 if the current media temperature has reached a predetermined temperature or if the system is set to a cooling mode.

[0152] In S1507, the system control unit 50 waits for a predetermined time (the temperature recording information update cycle). In this embodiment, the predetermined time is 1 minute, but it may be any time such as 1 second or 1 hour. The system control unit 50 waits without proceeding to S1501 until the time obtained from the system timer 53 plus the predetermined time. Note that the predetermined time may be set to different time intervals depending on the type of digital camera 100, depending on the drive frequency of the thermometer 92 and the operating frequency of the system control unit 50.

[0153] In S1508, the system control unit 50 reads information about the current medium temperature and equipment status from the temperature record information.

[0154] In S1509, the system control unit 50 determines whether the device status information read most recently from the temperature record information indicates a video recording state. If it is determined that the device status information indicates a video recording state, the system proceeds to S1510; otherwise, it proceeds to S1514.

[0155] In S1510, the system control unit 50 displays the information of the medium temperature (hereinafter referred to as "read temperature") most recently read from the temperature recording information on the display unit 28. In the example temperature graph in Figure 16, the system control unit 50 can plot points indicating the medium temperature at 11 time positions from time x1 to the time position of the graph origin. These 11 positions are arranged at equal intervals along the horizontal axis. If, at the start of processing in S1510, points have already been plotted at 11 positions on the temperature graph, the system control unit 50 erases the point corresponding to the oldest measurement time, leaving 10 points displayed. The system control unit 50 then moves the positions of the 10 points horizontally by one interval (the horizontal distance between points) so that they are closer to the origin. Subsequently, the system control unit 50 plots the points indicating the read temperature at positions further from the origin than the 10 points, so that the positions of the 11 points are arranged at equal intervals along the horizontal axis.

[0156] In the example shown in Figure 17, the device is in recording standby mode during the period between time 1704 and time 1705 (S1509NO), so the point indicating the medium temperature corresponding to that time is not displayed on the temperature graph.

[0157] In S1511, the system control unit 50 determines whether the difference (interval) between the measurement time of the read temperature and the measurement time of the medium temperature displayed on the temperature graph immediately preceding the read temperature (hereinafter referred to as the "previously displayed temperature") is the same as the predetermined time in S1507. If it is determined that the difference between the two measurement times is the same as the predetermined time, the process proceeds to S1512; otherwise, it proceeds to S1513. Note that the previously displayed temperature is calculated at a later time than the read temperature. This is also the media temperature measured during video recording, and is the temperature measured at the time closest to the readout temperature measurement time.

[0158] For example, in the example in Figure 17, if the measurement time of the read temperature is 17:03, the difference between the previous measurement time of the displayed temperature (17:03) and time 17:02 is determined to be the same as a predetermined time (=1 minute). If the measurement time of the read temperature is 17:05, the difference between the previous measurement time of the displayed temperature (17:04) and time 17:05 is determined to be not the same as a predetermined time.

[0159] In S1512, the system control unit 50 connects the point indicating the read temperature with the point indicating the previously displayed temperature. For example, if the point indicating the read temperature is point 1602, then point 1601, which indicates the previously displayed temperature, and point 1602 are connected by line 1608.

[0160] In S1513, the system control unit 50 determines whether the medium temperature is displayed in all displayable ranges (all display positions; 11 positions in the example of Figure 16) on the temperature graph. If it is determined that the medium temperature is displayed in all display positions, the system proceeds to S1507; otherwise, it proceeds to S1514.

[0161] In S1514, the system control unit 50 determines whether or not information on the media temperature measured (acquired) prior to the read temperature (hereinafter referred to as "past media temperature") is stored in the temperature record information. If it is determined that information on past media temperature is stored in the temperature record information, the process proceeds to S1515; otherwise, the process proceeds to S1507.

[0162] In S1515, the system control unit 50 reads from the temperature recording information information the media temperature information and equipment status information corresponding to the measurement time closest to the measurement time of the read temperature among the past media temperatures stored in the temperature recording information.

[0163] According to this embodiment, the media temperature and device status at each time point can be recorded, and only the media temperature for a specific device status (video recording state) can be displayed. This allows the user to be notified of changes in media temperature in device statuses that are prone to causing temperature changes, such as the video recording state. Furthermore, if the user sets a specific device status multiple times, the user can estimate future changes in media temperature in that specific status by comparing the changes in media temperature each time.

[0164] In Embodiment 6, an example was shown where the operating limit temperature coincided with the media temperature at which the operating limit was actually performed. However, the operating limit temperature may be within a predetermined temperature difference from the media temperature at which the operating limit was actually performed. By displaying a lower temperature with a margin (difference) from the actual operating limit temperature using a scale line, it is possible to effectively encourage the user to prevent the media temperature from reaching the temperature at which the operating limit was actually performed. In this way, even if the media temperature reaches the scale line, the operating limit may not be immediately performed, thereby preventing a loss of usability.

[0165] Furthermore, if the device remains in recording standby mode for an extended period, or if the digital camera 100 is temporarily turned off, the time interval (S1511) at which the media temperature is measured during video recording may not be the same as the predetermined standby time (S1507). As mentioned above, the intervals between points plotted on the temperature graph may be equal, or they may be intervals corresponding to the actual elapsed time. Also, in the temperature graph, the intervals between points not connected by lines may be a fixed interval different from the intervals between points connected by lines.

[0166] Furthermore, in the temperature graph shown in Figure 16, the number of display positions for the points indicating the medium temperature is set to 11. However, the number of display positions may be increased or decreased, and the scale of the line (line graph) may be changed so that all past media temperatures corresponding to the video recording state are displayed. In addition, in the temperature recording information, only the points indicating the media temperature from the most recent time when the device was in video recording state up to a certain time before that may be displayed. Alternatively, the period from the start to the end of video recording state may be considered as one period, and only the points indicating the media temperature for a specific number of video recording state periods may be displayed.

[0167] <Embodiment 7> Embodiment 7 describes a digital camera 100 that records information on the medium temperature, the equipment status, and the measurement time of the medium temperature according to Embodiment 6 as past "temperature record information," and displays past changes in the medium temperature based on the past temperature record information. The digital camera 100 also displays past changes in the medium temperature (time change) and the current changes in the medium temperature (time change) overlaid on each other. The current change in the medium temperature refers to the change in the medium temperature that indicates at least the medium temperature within a predetermined time (for example, within 30 minutes) since the measurement. Past changes in the medium temperature refer to changes in the medium temperature measured at a time earlier than the time when the medium temperature indicated by the current change in the medium temperature was measured.

[0168] Figure 18 is a flowchart showing the process of displaying past changes in media temperature based on temperature recording information and overlaying them with the current changes in media temperature based on user operation. The process in this flowchart starts when a menu button, one of the operation buttons on the operation unit 70, is pressed by the user, transitioning to the menu screen, and then the "Temperature Graph Comparison" item is selected on the menu screen. The process in this flowchart is realized when the system control unit 50 loads the program stored in the non-volatile memory 56 into the system memory 52 and executes it.

[0169] Figure 19 shows the graph list screen displayed when the "Temperature Graph Comparison" item is selected on the menu screen. Temperature graphs 1901 to 1904 each show past changes in media temperature based on past temperature recording information. In Embodiment 7, the digital camera 100 stores temperature recording information in the non-volatile memory 56 for each date and recording resolution (2K, 4K, 8K, etc.). Then, when the graph list screen is displayed, the digital camera 100 generates temperature graphs 1901 to 1904 by reading the temperature recording information. The selection frame 1905 is a frame for selecting one of the temperature graphs 1901 to 1904. When the selection frame 1905 is showing one of the temperature graphs 1901 to 1904, the user can select the temperature graph shown in the selection frame 1905 by pressing the SET button 75.

[0170] Figure 20 shows the temperature graph displayed after the user has selected the temperature graph indicated by selection box 1905. In the temperature graph shown in Figure 20, line 2001 shows the past changes in the medium temperature corresponding to the temperature graph selected by the user, and line 2002 shows the current changes in the medium temperature.

[0171] In S1801, the system control unit 50 reads past temperature recording information from the non-volatile memory 56 for each date and recording resolution.

[0172] In S1802, the system control unit 50 displays multiple temperature graphs showing past changes in media temperature based on the past temperature record information read in S1801. In this embodiment, the system control unit 50 reads four past temperature record information entries with the most recent dates from the non-volatile memory 56 and generates temperature graphs 1901 to 1904 showing past changes in media temperature during video recording. If no past temperature record information is stored in the non-volatile memory 56, no line graphs are displayed in the temperature graphs.

[0173] In this embodiment, the system control unit 50 displays four temperature graphs based on the most recent temperature record information. However, the number of temperature graphs displayed is not limited to four; it may be more or less than four. Furthermore, temperature graphs based on older temperature record information may also be displayed. In addition, any number of temperature graphs may be displayed based on temperature record information selected by the user.

[0174] In S1803, the system control unit 50 acquires information about the initial position of the selection frame. The system control unit 50 acquires, for example, a position that displays a specific temperature graph (temperature graph 1901 in the example in Figure 19) as the initial position of the selection frame and stores the information of that initial position in the memory 32. The initial position may be a position that displays any temperature graph, or a position that does not display any temperature graph.

[0175] In S1804, the system control unit 50 displays the selection frame in its initial position. As a result, the graph list screen shown in Figure 19 is displayed on the display unit 28. In the example shown in Figure 19, the system control unit 50 displays the selection frame 1905 on the display unit 28, overlaid on the temperature graph displayed in S1802.

[0176] In S1805, the system control unit 50 determines whether one of the multiple temperature graphs displayed on the display unit 28 has been selected by the user pressing the SET button 75. If it is determined that the user has pressed the SET button 75, the process proceeds to S1808; otherwise, the process proceeds to S1806.

[0177] In S1806, the system control unit 50 determines whether or not the user has moved the selection frame. If it is determined that the selection frame has been moved, the process proceeds to S1807; otherwise, it returns to S1805.

[0178] In S1807, the system control unit 50 moves the position of the selection frame in response to the movement operation. In the example shown in Figure 19, the system control unit 50 moves the selection frame 1905 to a position that displays one of the temperature graphs 1901 to 1904 in response to the movement operation.

[0179] In S1808, the system control unit 50 displays the temperature graph selected in S1805. In the examples in Figures 19 and 20, the system control unit 50 displays, for example, temperature graph 1902, which was selected in S1805 from among temperature graphs 1901 to 1904. As a result, as shown in Figure 20, a line graph 2001 showing past changes in the medium temperature is displayed.

[0180] In S1809, the system control unit 50 displays the current change in media temperature. In the example in Figure 20, the system control unit 50 displays a line graph 2002, which shows the current change in media temperature during video recording, overlaid on line graph 2001.

[0181] According to this embodiment, past changes in media temperature selected by the user can be compared and displayed with the current changes in media temperature. This allows the user to estimate future changes in media temperature by referring to past changes in media temperature.

[0182] In this embodiment, a single past change in media temperature is displayed in comparison with the current change in media temperature. However, the embodiment is not limited to this, and multiple past changes in media temperature may be displayed (selected).

[0183] In this embodiment, temperature recording information is recorded for each date and recording resolution, but temperature recording information may also be recorded for each date or for each recording resolution.

[0184] In this embodiment, the digital camera 100 displays a line graph 2001 showing past changes in media temperature and a line graph 2002 showing current changes in media temperature overlaid on top of each other. However, the digital camera 100 is not limited to this, and may display line graphs 2001 and 2002 side by side, either vertically or horizontally. Furthermore, each line graph may be movable vertically or horizontally according to user operation to facilitate comparison. In addition, the user may be able to adjust the time range displayed on the temperature graph from the past temperature record information.

[0185] In the embodiments described above, the device state was assumed to be either a recording standby state or a video recording state, but it is not limited to these, and may be other device states that affect media temperature or operating limits. For example, the device state may be the insertion or removal state of a recording medium that can be inserted into the recording medium 200. Furthermore, the device state may be the insertion or removal state for each recording medium identification information, such as manufacturer information, or the media insertion or removal state for each recording medium type, such as a CFexpress card or an SD card. In addition, the device state may be the state before and after setting initialization (the state before setting initialization or the state after setting initialization) read from the non-volatile memory 56, or the state before and after a change in firmware version information. The device state may also be the video recording setting state, such as the recording format (recording format such as file format or codec), recording resolution, and frame rate.

[0186] The device status may also be the illumination status of the display units included in the display unit 28 or the viewfinder external display unit 43, or the illumination brightness status indicating the brightness of the display units when illuminated. The device status may also be the communication status of the external input / output terminals included in the interface 18. The device status may also be the mounting status of external equipment such as lenses like the lens unit 150, tripods, various terminals, handles, strobes, lights, rigs, mudguards, filters, and housings.

[0187] The device state may be a power-saving mode with different power consumption, or a high-performance mode that increases power consumption to improve performance. The device state may be a cooling mode that prioritizes cooling the media temperature, which is not normal operation. The device state may be a sensor drive mode in which the update cycle of the sensor, such as the imaging unit 22, or the pixel signal readout method differs from normal. The device state may be the power supply state, such as the battery, AC power, or USB power supply unit included in the power supply unit 30. The device state may be the weather and temperature of the current location obtained by external communication via the communication unit 54 or by the thermometer 93, or the surrounding environment that can be estimated from the weather and temperature. The device state may be the device settings (aperture value of the lens unit 150, shutter speed of the shutter 101, sensitivity of the imaging unit 22, exposure value Ev obtained from the imaging result), or the surrounding environment that can be estimated from the device settings.

[0188] Furthermore, the embodiments described above can be combined in any way without creating any inconsistencies. For example, in the temperature graph, along with the time change of the current medium temperature and the time change of the medium temperature in the past, a scale line indicating the warning temperature, a scale line indicating the recording stop temperature, and a scale line indicating the operating limit temperature may be displayed.

[0189] Furthermore, the various controls described above, which are performed by the system control unit 50, may be performed by a single piece of hardware, or multiple pieces of hardware (for example, multiple processors or circuits) may share the processing to control the entire device.

[0190] Furthermore, although the present invention has been described in detail based on its preferred embodiments, the present invention is not limited to these specific embodiments, and various forms that do not depart from the spirit of the invention are also included in the present invention. Moreover, each of the embodiments described above is merely one embodiment of the present invention, and it is possible to combine each embodiment as appropriate.

[0191] Furthermore, although the above-described embodiments explained the case where the present invention is applied to a digital camera as an example, this is not limited to this example, and the recording medium can detect the temperature, and the temperature This invention is applicable to any electronic device whose operation is restricted depending on the degree of operation. In other words, the present invention is applicable to personal computers, PDAs, mobile phone terminals, portable image viewers, printers equipped with displays, digital photo frames, music players, game consoles, e-book readers, and the like.

[0192] Furthermore, the present invention is applicable not only to the imaging device itself, but also to a control device (display control device) that communicates with the imaging device (including network cameras) via wired or wireless communication and remotely controls the imaging device. Examples of devices that remotely control the imaging device include smartphones, tablet PCs, and desktop PCs. The imaging device can be remotely controlled by notifying the imaging device of commands to perform various operations and settings based on operations and processing performed on the control device side. In addition, live view images captured by the imaging device may be received via wired or wireless communication and displayed on the control device side.

[0193] Furthermore, each functional unit in each of the above embodiments (each modified example) may or may not be individual hardware. The functions of two or more functional units may be implemented by common hardware. Each of the multiple functions of a single functional unit may be implemented by individual hardware. Two or more functions of a single functional unit may be implemented by common hardware. In addition, each functional unit may or may not be implemented by hardware such as an ASIC, FPGA, or DSP. For example, the device may have a processor and a memory (storage medium) in which a control program is stored. The functions of at least some of the functional units of the device may be implemented by the processor reading and executing the control program from the memory.

[0194] (Other embodiments) The present invention can also be realized by supplying a program that implements one or more of the functions of the above embodiments to a system or device via a network or storage medium, and by having one or more processors in the computer of that system or device read and execute the program. It can also be realized by a circuit (e.g., an ASIC) that implements one or more functions. [Explanation of Symbols]

[0195] 100: Digital camera, 28: Display unit, 50: System control unit, 93: Thermometer

Claims

1. A temperature acquisition means for acquiring information on the medium temperature, which is the temperature of a first recording medium attached to an electronic device, A control means that controls the display means to display a first item indicating a first temperature at which, if the medium temperature reaches, a specific operation of the electronic device may be restricted, a second item indicating a second temperature at which the specific operation has been restricted, and the time change of the medium temperature. It has, The aforementioned specific operation is at least one of the following: recording, using the flash function, or using the high-quality shooting mode. A display control device characterized by the following:

2. The control means controls the first temperature to be displayed by the first item, which is shown as a band on the time change of the medium temperature, and the second temperature to be displayed by the second item, which is shown as a line on the time change of the medium temperature. The display control device according to feature 1.

3. The second temperature is the temperature at which the specific operation of the electronic device is restricted. The first temperature is a temperature determined by the control means based on the first recording medium. The display control device according to claim 1 or 2, characterized in that it is a display control device.

4. It has a storage unit that holds support information associated with the manufacturer of the recording medium and temperature information. The control means determines the first temperature based on the manufacturer of the first recording medium mounted in the electronic device and the support information. The display control device according to any one of claims 1 to 3.

5. The control means determines the first temperature based on information about the temperature at which the operation of the first recording medium is restricted, the manufacturer of the first recording medium, and the support information. The display control device according to feature 4.

6. The aforementioned support information includes an offset value as temperature information. The control means determines the temperature obtained by offsetting the offset value from the temperature at which the operation of the first recording medium is restricted as the first temperature. The display control device according to claim 5.

7. The temperature acquisition means acquires information of the medium temperature measured by the temperature measuring unit of the first recording medium from the first recording medium. The display control device according to any one of claims 1 to 6.

8. The electronic device has a storage means for storing a stop temperature, which is the medium temperature of the first recording medium when the specific operation is restricted, The second temperature is the stop temperature at which the specific operation is restricted, as stored by the storage means. The storage means stores the stop temperature when the cessation of the specific operation occurs due to a buffer overflow and the media temperature of the first recording medium is higher than a predetermined threshold value set in advance for the first recording medium. The display control device according to claim 1 or 2, characterized in that it is a display control device.

9. The storage means stores the stop temperature when the cessation of the specific operation occurs due to a buffer overflow, but the media temperature of the first recording medium is below a predetermined threshold, and the writing speed to the first recording medium is slower before the cessation of the specific operation than at the start of the specific operation. The display control device according to claim 8.

10. The control means controls the electronic device to display the time change of the medium temperature on the display means during a period when the electronic device is in a specific device state, and controls the electronic device not to display the time change of the medium temperature on the display means during a period when the electronic device is not in a specific device state. The aforementioned specific operation is a recording operation, and the aforementioned specific device state is the recording state and the recording standby state. The display control device according to any one of claims 1 to 9.

11. The device has a determination means for determining whether or not the electronic device supports the first recording medium, If the control means determines that the electronic device does not support the first recording medium, it controls the display of the first item. A display control device according to any one of claims 1 to 10.

12. A means for acquiring information on a third temperature set by the user, When the temperature of the medium changes to or below the third temperature, a notification means is provided to notify the user that the temperature of the medium has changed to or below the third temperature. The display control device according to any one of claims 1 to 11, further comprising the above.

13. The notification means is, If the display means is lit, the user is notified that the medium temperature has changed to the third temperature or lower by displaying a predetermined string of characters on the display means. If the indicator means is not lit, the user is notified that the medium temperature has changed to the third temperature or below by illuminating or flashing a predetermined light-emitting means. The display control device according to claim 12.

14. The control means controls the display means to display the first item at a fixed position, regardless of the value indicated by the first temperature. The display control device according to any one of claims 1 to 9.

15. The control means controls the display means to display the past time change of the medium temperature and the current time change of the medium temperature. The display control device according to any one of claims 1 to 14.

16. The control means controls the display means to display the time change of the ambient temperature along with the time change of the medium temperature. The display control device according to any one of claims 1 to 15.

17. The first recording medium is a recording medium of a first type or a recording medium of a second type, The control means causes the display format of the first item when the first recording medium is of the first type to be different from the display format of the first item when the first recording medium is of the second type. The display control device according to any one of claims 1 to 16.

18. A temperature acquisition step to acquire information on the medium temperature, which is the temperature of a first recording medium attached to an electronic device, A control step that controls the display means to display a first item indicating a first temperature at which a specific operation of the electronic device may be restricted when the medium temperature is reached, a second item indicating a second temperature at which the specific operation is restricted, and the time change of the medium temperature. It has, The aforementioned specific operation is at least one of the following: recording, using the flash function, or using the high-quality shooting mode. A display control method characterized by the following:

19. A program for causing a computer to function as one of the means of a display control device described in any one of claims 1 to 17.

20. A computer-readable storage medium storing a program for causing a computer to function as one of the means of a display control device described in any one of claims 1 to 17.

Images