JP2017120950A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device that changes timing of authentication of a battery due to difference in communication speed of an accessory when a camera and the accessory connectable to the imaging device are connected, performs authentication of the battery and warning display, and performs connection control of the imaging device and the accessory.SOLUTION: In an imaging device having a configuration to extend a photographing function by connecting with an accessory, communication control means performs authentication in order to check to see if a battery mounted on the accessory is a genuine product by battery authentication means, permits communication with the accessory if the battery has been authenticated, requests a user to input recognition on whether the battery is a genuine product by user interface means if the battery has not been authenticated, and performs communication control by the communication control means depending on an answer of the user.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an imaging device to which accessories can be connected.

  2. Description of the Related Art Conventionally, there has been proposed an apparatus for performing battery power supply control in order to prevent the occurrence of an event that a remaining battery charge is not correctly displayed due to the use of a non-genuine battery.

  Patent Document 1 discloses that when authenticating a battery of a connected battery, a genuine product is normally operated, and a non-genuine product is shifted to a minimum power mode.

  However, there is no disclosure about a method of changing connection timing of the battery and controlling connection with the accessory due to a difference in the communication speed of the accessory when the accessory that can be connected to the imaging device is connected.

  Patent Document 2 discloses that when the battery authentication of the connected battery is performed, the connection of the device is permitted if it is a genuine product, and the connection of the device is rejected if it is a non-genuine product. .

  However, there is no disclosure about a method for changing connection timing of a battery and controlling connection with an accessory due to a difference in communication speed of the accessory at the time of connecting the accessory that can be connected to the imaging device as in Patent Document 1.

JP 2006-045454 A Japanese Patent Laid-Open No. 2005-094128

  The prior art disclosed in Patent Literatures 1 and 2 discloses a method for changing the timing of battery authentication and controlling connection with an accessory due to a difference in the communication speed of the accessory when connecting the accessory that can be connected to the imaging device. There is no.

  Therefore, the object of the present invention is to change the authentication timing of the battery according to the difference in the communication speed of the accessory when connecting an accessory that can be connected to the camera and the imaging device, perform battery authentication and warning display, and An object of the present invention is to provide an imaging apparatus that performs connection control with an accessory.

In order to achieve the above object, an imaging apparatus according to the present invention includes:
An image pickup apparatus having a configuration that expands a photographing function by connecting with an accessory, battery authenticating means for performing authentication to verify that a battery loaded in the accessory is a genuine product, user interface means, Communication control means for controlling communication with the accessory. The communication control means performs authentication to verify that the battery loaded in the accessory by the battery authentication means is a genuine product, and if the battery can be authenticated, permits communication with the accessory, If the battery could not be authenticated, the user interface means requests the user to input the recognition as to whether the battery is genuine or not, and the communication control means performs communication control according to the user's response. It is characterized by.

  According to the imaging apparatus according to the present invention, it is possible to prevent problems such as that the remaining battery level due to the use of a non-genuine battery is not displayed correctly. In addition, when connecting an accessory that can be connected to the camera and the imaging device, the timing of battery authentication is changed due to the difference in the communication speed of the accessory, battery authentication and warning display are performed, and connection control between the imaging device and the accessory is performed. It becomes possible to do.

It is an external view of a digital camera. It is a block diagram of a digital camera. 3 is a flowchart of the first embodiment. 3 is a flowchart of the first embodiment. 10 is a main flowchart of the second embodiment. 10 is a main flowchart of the second embodiment. 6 is a flowchart of Embodiment 2.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Embodiment 1>
Hereinafter, a battery authentication apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings.

  1A and 1B are external views of a digital camera as an example of an imaging apparatus of the present invention. 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.

  In FIG. 1, a display unit 28 is a display unit that displays images and various types of information. The shutter button 61 is an operation unit for issuing a shooting instruction. The mode switch 60 is an operation unit for switching various modes. The terminal cover 40 is a cover for protecting a connector (not shown) such as a connection cable for connecting a connection cable with an external device and the digital camera 100. The main electronic dial 71 is a rotary operation member included in the operation unit 70 of FIG. 2, and by changing the main electronic dial 71, setting values such as a shutter speed and an aperture can be changed. The power switch 72 is an operation member that switches the power of the digital camera 100 on and off.

  The sub electronic dial 73 is included in the operation unit 70 of FIG. 2 and is a rotation operation member, which can move a selection frame, feed an image, and the like. The cross key 74 is included in the operation unit 70 of FIG. 2 and is a cross key that can be pressed in the upper, lower, left, and right portions. An operation corresponding to the pressed portion of the cross key 74 is possible. The SET button 75 is included in the operation unit 70 of FIG. 2 and is a push button, and is mainly used for determining a selection item. The LV button 76 is included in the operation unit 70 of FIG. 2 and is a button for switching ON / OFF of the live view (hereinafter referred to as LV) in the still image shooting mode. In the moving image shooting mode, it is used to start and stop moving image shooting (recording). The enlargement button 77 is included in the operation unit 70 of FIG. 2, and is an operation button for performing ON / OFF of the enlargement mode and changing the enlargement ratio during the enlargement mode in the live view display in the shooting mode. In the reproduction mode, it functions as an enlargement button for enlarging the reproduction image and increasing the enlargement ratio.

  The playback button 78 is included in the operation unit 70 in FIG. 2 and is an operation button for switching between the shooting mode and the playback mode. When the playback button 78 is pressed during the shooting mode, the mode is switched to the playback mode, and the latest image among the images recorded on the recording medium 200 can be displayed on the display unit 28. The MENU button 79 is included in the operation unit 70 in FIG. 2 and is an operation button for switching between the shooting mode and the menu mode. The quick return mirror 12 is instructed by the system control unit 50 of FIG. 2 and is raised and lowered by an actuator (not shown). The communication terminal 10 is a communication terminal for the digital camera 100 to communicate with the lens side (detachable).

The eyepiece finder 16 is a view-type finder for observing the focusing screen 13 in FIG. 2 to confirm the focus and composition of the optical image of the subject obtained through the lens unit 150 in FIG. The lid 202 is a slot lid in which the recording medium 200 of FIG. 2 is stored. The grip portion 90 is a holding portion that is shaped to be easily gripped with the right hand when the user holds the digital camera 100. The flash 19 is a flash device built in the digital camera 100. FIG. 2 is a block diagram showing a configuration example of the digital camera 100 according to the present embodiment.

  In FIG. 2, a lens unit 150 is a lens unit on which a replaceable photographic lens is mounted.

  The lens 103 is usually composed of a plurality of lenses, but here, only a single lens is shown for simplicity. The communication terminal 6 is a communication terminal for the lens unit 150 to communicate with the digital camera 100 side, and the communication terminal 10 is a communication terminal for the digital camera 100 to communicate with the lens unit 150 side. The lens unit 150 communicates with the system control unit 50 via the communication terminals 6, 10, controls the diaphragm 102 via the diaphragm driving circuit 2 by the internal lens system control circuit 4, and passes through the AF driving circuit 3. The focus is adjusted by displacing the position of the lens 103.

  The AE sensor 17 measures the luminance of the subject that has passed through the lens unit 150. The focus detection unit 11 outputs defocus amount information to the system control unit 50. Based on this, the system control unit 50 controls the lens unit 150 to perform phase difference AF.

  The quick return mirror 12 (hereinafter, mirror 12) is instructed by the system control unit 50 during exposure, live view shooting, and moving image shooting, and is moved up and down by an actuator (not shown). The mirror 12 is a mirror for switching the light beam incident from the lens 103 between the viewfinder 16 side and the imaging unit 22 side. The mirror 12 is normally arranged so as to reflect the light beam to the viewfinder 16, but when shooting is performed or in live view display, the mirror 12 is directed upward to guide the light beam to the imaging unit 22. Retreat from the bounced light flux (mirror up). Further, the mirror 22 is a half mirror so that the central part can transmit part of the light, and part of the light beam is transmitted so as to be incident on the focus detection unit 11 for performing focus detection.

  The photographer can check the focus and composition of the optical image of the subject obtained through the lens unit 150 by observing the focusing screen 13 via the pentaprism 14 and the finder 16.

  The focal plane shutter 101 is a focal plane shutter that can freely control the exposure time of the image sensor unit 22 under the control of the system control unit 50.

  The imaging unit 22 is an imaging device configured with a CCD, a CMOS device, or the like that converts an optical image into an electrical signal. The A / D converter 23 converts an analog signal into a digital signal. The A / D converter 23 is used to convert an analog signal output from the imaging unit 22 into a digital signal.

  The image processing unit 24 performs resizing processing such as predetermined pixel interpolation and reduction and color conversion processing on the data from the A / D converter 23 or the data from the memory control unit 15. The image processing unit 24 performs predetermined calculation processing using the captured image data, and the system control unit 50 performs exposure control and distance measurement control based on the obtained calculation result. Thereby, AF (autofocus) processing, AE (automatic exposure) processing, and EF (flash pre-emission) processing of the TTL (through-the-lens) method are performed. The image processing unit 24 further performs predetermined calculation processing using the captured image data, and also performs TTL AWB (auto white balance) processing based on the obtained calculation result.

  Output data from the A / D converter 23 is directly written into the memory 32 via the image processing unit 24 and the memory control unit 15 or via the memory control unit 15.

  The memory 32 stores image data obtained by the imaging unit 22 and converted into digital data by the A / D converter 23 and image data to be displayed on the display unit 28. The memory 32 has a storage capacity sufficient to store a predetermined number of still images, a moving image and sound for a predetermined time. The memory 32 also serves as an image display memory (video memory).

  The D / A converter 25 converts the image display data stored in the memory 32 into an analog signal and supplies the analog signal to the display unit 28. Thus, the display image data written in the memory 32 is displayed on the display unit 28 via the D / A converter 25.

  The display unit 28 performs display according to the analog signal from the D / A converter 25 on a display such as an LCD. The digital signal once A / D converted by the A / D converter 23 and stored in the memory 32 is converted into an analog signal by the D / A converter 25 and sequentially transferred to the display unit 28 for display, thereby providing an electronic viewfinder. It functions and can perform live view display (live view display).

  The nonvolatile memory 56 is an electrically erasable / recordable memory, and for example, an EEPROM or the like is used. The nonvolatile memory 56 stores constants, programs, and the like for operating the system control unit 50. Here, the program is a program for executing various flowcharts described later in the present embodiment.

  The system control unit 50 controls the entire digital camera 100. By executing the program recorded in the non-volatile memory 56 described above, each process of the present embodiment to be described later is realized.

  A system memory 52 is a RAM. In the system memory 52, constants and variables for operation of the system control unit 50, programs read from the nonvolatile memory 56, and the like are expanded. The system control unit also performs display control by controlling the memory 32, the D / A converter 25, the display unit 28, and the like.

  The system timer 53 is a time measuring unit that measures the time used for various controls and the time of a built-in clock. The flash control circuit 54 is a circuit that controls the flash 19. The pop-up, flash timing, and flash level of the flash 19 are adjusted.

  The mode switch 60, the first shutter switch 62, the second shutter switch 64, and the operation unit 70 are operation means for inputting various operation instructions to the system control unit 50.

  The mode switch 60 switches the operation mode of the system control unit 50 to any one of a still image recording mode, a moving image recording mode, a reproduction mode, and the like. The modes included in the still image recording mode include an auto shooting mode, an auto scene discrimination mode, a manual mode, an aperture priority mode (Av mode), a shutter speed priority mode (Tv mode), and various scene modes that are shooting settings for each shooting scene. , Program AE mode, custom mode, etc. The mode changeover switch 60 can directly switch to any of these modes included in the still image shooting mode. Alternatively, after switching to the still image shooting mode once with the mode switch 60, the mode may be switched to one of these modes included in the still image shooting mode using another operation member. Similarly, the moving image shooting mode may include a plurality of modes.

  The first shutter switch 62 is turned on when the shutter button 61 provided in the digital camera 100 is being operated, so-called half-press (shooting preparation instruction), and generates a first shutter switch signal SW1. In response to the first shutter switch signal SW1, operations such as AF (autofocus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, and EF (flash pre-emission) processing are started.

  The second shutter switch 64 is turned ON when the operation of the shutter button 61 is completed, that is, when it is fully pressed (shooting instruction), and generates a second shutter switch signal SW2. In response to the second shutter switch signal SW2, the system control unit 50 starts a series of shooting processing operations from reading a signal from the imaging unit 22 to writing image data on the recording medium 200.

  The operation unit 70 is various operation members as an input unit that receives an operation from a user. The operation unit 70 includes at least the following operation units. Shutter button 61, main electronic dial 71, power switch 72, sub electronic dial 73, cross key 74, SET button 75, LV button 76, enlarge button 77, and play button 78.

  The power control unit 80 includes a battery detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like, and detects whether or not a battery is installed, the type of battery, and the remaining battery level. Further, the power control unit 80 controls the DC-DC converter based on the detection result and an instruction from the system control unit 50, and supplies a necessary voltage to each unit including the recording medium 200 for a necessary period.

  The communication control unit 82 performs battery authentication and battery type detection of the accessory unit 300 described later. Further, the communication control unit 82 controls connection / disconnection of communication with the accessory unit 300 based on a battery authentication result with the accessory unit 300. Further, the communication control unit 82 establishes a communication method and performs information communication in order to use the function of the accessory unit 300.

  The power supply unit 30 includes a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, a NiMH battery, or a Li battery, an AC adapter, or the like. The recording medium I / F 18 is an interface with the recording medium 200 such as a memory card or a hard disk. The recording medium 200 is a recording medium such as a memory card for recording a captured image, and includes a semiconductor memory, a magnetic disk, or the like.

  In FIG. 2, an accessory unit 300 is an accessory unit on which devices such as a strobe, a GPS, and a wireless LAN for extending the functions of the digital camera 100 are mounted.

  The nonvolatile memory 356 is an electrically erasable / recordable memory, and for example, an EEPROM or the like is used. The nonvolatile memory 356 stores constants, programs, and the like for the operation of the system control unit 350. Here, the program is a program for executing various flowcharts described later in the present embodiment.

  The system control unit 350 controls the entire accessory unit 300. The system control unit 350 receives information for battery authentication and battery type detection from the battery 392, and instructs the communication control unit 382 to exchange battery authentication and battery type with the digital camera 100.

  The power switch 372 is an operation member as an input unit that receives an operation from the user. The power supply control unit 380 includes a battery detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like, and detects whether or not a battery is attached, the type of battery, and the remaining battery level. Moreover, the power supply control part 380 controls a DC-DC converter based on the detection result and the instruction | indication of the system control part 350, and supplies a required voltage to each part for a required period.

  The battery 392 includes a battery such as a NiCd battery, a NiMH battery, or a Li battery. The battery 392 includes a plus voltage line (+), a minus voltage line (−), and a signal line (S). The plus voltage line (+) and the minus voltage line (−) are connected to the power supply control unit 380. The signal line (S) is connected to the system control unit 350. Battery authentication and battery type information is sent using the signal line (S).

  The communication control unit 382 exchanges battery authentication and battery type with the digital camera 100. When the accessory unit 300 performs battery authentication of the battery 392, the communication control unit 382 has the function. In addition, the communication control unit 382 establishes a communication method and information communication with the digital camera 100 in order to provide the function of the accessory unit 300.

  Here, battery authentication performed by the communication control unit 82 will be described.

  In battery authentication, authentication processing is performed to distinguish between genuine products and non-genuine products. The battery 392 includes an authentication IC (not shown) and key data (not shown) necessary for performing the authentication process. Similarly, the digital camera 100 also includes an authentication IC (not shown) and key data (not shown). In the authentication process, the authentication process succeeds when the battery 392 and the key data of the digital camera 100 correspond to each other by an encryption method such as a common key encryption method or a public key encryption method. When the authentication process is performed by the accessory unit 300, an authentication IC (not shown) and key data (not shown) may be mounted on the accessory unit 300 in addition to the battery 392.

  In addition, some non-genuine products are equipped with an authentication IC and key data imitating genuine products, but it is generally difficult to copy key data of genuine products. Therefore, since the authentication process fails, it is found that the battery is a non-genuine product.

  FIGS. 3A and 3B are flowcharts of the authentication system according to the first embodiment. Each process in this flowchart is realized by the system control unit 50 executing a program stored in the nonvolatile memory 56.

  When the accessory unit 300 is connected to the digital camera 100, the system control unit 50 starts execution.

[Step S102] Acquisition of accessory information The accessory information of the accessory unit 300 is acquired by the communication control unit 82.

[Step S104] It is determined whether accessory information has been acquired in the accessory information step S102. If the accessory information can be acquired, the process proceeds to step S106. If the accessory information cannot be acquired, the process branches to step S102.

[Step S106] Communication method The communication method of the accessory information acquired in step S102 is determined. If the communication method is a high-speed communication method, the process branches to (I), that is, step S112. If the communication method is a low-speed communication method, the process branches to step S108.

  Here, as a classification method of the high-speed communication method and the low-speed communication method, the communication method may be classified according to a standard such as USB (Universal Serial Bus), IEEE 1394, or the communication speed between the digital camera 100 and the accessory unit 300. You may classify | categorize based on an accessory device.

[Step S108] It is determined whether the camera state is standby or the camera state is standby. If the camera state is waiting, the process branches to (I), that is, step S112. If the camera state is not waiting, the process branches to step S108.

  As described above, when the camera and the accessory are connected, immediate battery authentication is performed in the case of the high-speed communication method, and battery authentication is performed while the camera state is on standby in the case of the low-speed communication method.

[Step S <b> 112] The battery control of the battery 392 of the battery authentication accessory unit 300 is performed by the communication control unit 82.

[Step S114] It is determined whether the battery 392 is a genuine battery as a result of the battery authentication in step S112. If the battery 392 is a genuine battery, the process branches to step S116. If the battery 392 is not a genuine battery, the process branches to step S120.

[Step S116] Start Using Accessory Function Communication with the accessory unit 300 is continued by the communication control unit 82, and use of the accessory function is started by performing information communication with the accessory unit 300. That is, the accessory function can be used.

[Step S120] Are you using a genuine battery?
The message “Are you using a genuine battery?” Is displayed on the display unit 28.

[Step S122] It is determined whether the user operation is YES or the user operates the operation unit 70 and the user selects the YES icon. If the user selects the YES icon, the process branches to step S124; otherwise, the process branches to step S130.

[Step S124] There may be a non-genuine product. Please consult with the customer service center. Stop connecting to the accessory.
The display 28 displays a message “There is a possibility of a non-genuine product. Please consult with the customer service center. Connection with the accessory will be stopped.”

[Step S126] Stop Using Accessory Function The communication control unit 82 stops communication with the accessory unit 300. That is, the accessory function cannot be used.

  In this way, when the camera and accessories are connected and the battery authentication fails, the user is asked to enter the recognition as to whether the accessories are genuine or not, and the user's response recognizes the battery as genuine. When the input indicating that the device is present, communication with the accessory is stopped.

[Step S130] Operation and safety of this battery are not guaranteed. Do you want to continue using it?
The display unit 28 displays the wording “I do not guarantee the operation and safety of this battery. Do you want to continue using it?”.

[Step S132] It is determined whether the user operation is YES or the user operates the operation unit 70 and the user selects the YES icon. If the user selects the YES icon, the process branches to step S134; otherwise, the process branches to step S140.

[Step S134] Start Using Accessory Function The communication control unit 82 continues communication with the accessory unit 300, and starts using the accessory function by performing information communication with the accessory unit 300. That is, the accessory function can be used.

  In this case, since the user acknowledges the possibility of malfunction, the battery 392 can be used even if it is a non-genuine battery.

  In this way, when the camera and accessories are connected and the battery authentication fails, the user is requested to input recognition about the possibility of a battery failure, and the user's response recognizes the battery failure. When you enter, you can use the accessory function.

[Step S140] Stop connecting to the accessory.
The display 28 displays the wording “Stopping connection with accessories”.

[Step S142] Stop Using Accessory Function The communication control unit 82 stops communication with the accessory unit 300. That is, the accessory function cannot be used.

  In this case, since the user does not approve the possibility of the occurrence of a problem, the battery 392 is a non-genuine battery and cannot be used.

  In this way, when the camera and accessories are connected and the battery authentication fails, the user is requested to input recognition about the possibility of a battery failure, and the user's response does not recognize the battery failure. When the input is made, the accessory function is stopped.

  As described above, when an accessory that can be connected to the camera and the imaging device is connected, the timing of battery authentication is changed due to the difference in the communication speed of the accessory, battery authentication and warning display are performed, and the imaging device and the accessory are connected. It became possible to perform connection control. In addition, by using / stopping the accessory function with genuine / non-genuine batteries of accessories, it is possible to prevent problems such as the remaining battery level not being displayed correctly due to the use of non-genuine batteries. became.

<Embodiment 2>
In the first embodiment, even when the accessory communication method is a low-speed communication method, battery authentication is performed between the camera and the accessory. However, when communication is increased, the processing time is delayed due to a bottleneck of the communication path. is assumed.

  Thus, in the second embodiment, when the accessory communication method is the low-speed communication method, there is a bottleneck in the communication path by performing battery authentication within the accessory instead of performing battery authentication between the camera and the accessory. A method with less processing time delay will be described.

  FIGS. 4A and 4B are flowcharts of the authentication system in the second embodiment. Each process in this flowchart is realized by the system control unit 50 executing a program stored in the nonvolatile memory 56.

  When the accessory unit 300 is connected to the digital camera 100, the system control unit 50 starts execution. Here, steps different from those in the first embodiment will be described.

[Step S150] The battery authentication instruction communication control unit 82 on the accessory side sends an instruction to perform battery authentication on the accessory unit 300.

  Here, the battery authentication process performed by the accessory unit 300 will be described. FIG. 5 is a flowchart of the authentication system according to the second embodiment. Each process in this flowchart is realized by the system control unit 350 executing a program stored in the nonvolatile memory 356.

  When the communication control unit 82 of the digital camera 100 sends an instruction to perform battery authentication in the accessory unit 300 and the instruction is received by the communication control unit 382 of the accessory unit 300, the system control unit 350 starts execution.

[Step S202] The battery control of the battery 392 of the battery authentication accessory unit 300 is performed by the communication control unit 382.

[Step S204] Recording Battery Authentication Information The battery authentication result in step S202 is recorded as battery authentication information by the system control unit 350.

  Returning to FIG. 4A and FIG.

[Step S152] The battery authentication information acquisition communication control unit 82 acquires the battery authentication information performed in the accessory unit 300 in step S204. Thereafter, the process proceeds to (II), that is, step S114.

  In this way, when the camera and accessories are connected and the accessory communication method is a low-speed communication method, the battery authentication is performed on the accessory side, so even if there is a bottleneck in the communication path, the processing time can be reduced. The delay can be reduced.

  As described above, when an accessory that can be connected to the camera and the imaging device is connected, the timing of battery authentication is changed due to the difference in the communication speed of the accessory, battery authentication and warning display are performed, and the imaging device and the accessory are connected. It became possible to perform connection control. In addition, by using / stopping the accessory function with genuine / non-genuine batteries of accessories, it is possible to prevent problems such as the remaining battery level not being displayed correctly due to the use of non-genuine batteries. became.

28 display unit, 50 system control unit, 70 operation unit, 82 communication control unit,
100 digital camera, 300 accessory unit, 350 system control unit,
356 non-volatile memory, 372 power switch, 380 power controller,
382 communication control unit, 392 battery

Claims (7)

An imaging apparatus having a configuration that expands a shooting function by connecting to an accessory,
Battery authentication means for performing authentication to verify that the battery loaded in the accessory is genuine,
User interface means;
Communication control means for controlling communication with the accessory,
The communication control means performs authentication to verify that the battery loaded in the accessory by the battery authentication means is a genuine product, and if the battery can be authenticated, permits communication with the accessory, If the battery could not be authenticated, the user interface means requests the user to input the recognition as to whether the battery is genuine or not, and the communication control means performs communication control according to the user's response. An imaging apparatus characterized by the above.   The communication control unit acquires a communication method, and in the case of a high-speed communication method, immediately performs battery authentication by a battery authentication unit. In the case of a low-speed communication method, the communication control unit performs the battery authentication unit when the imaging device is in a specific state. The imaging apparatus according to claim 1, wherein battery authentication is performed.   The imaging apparatus according to claim 2, wherein the communication control means performs battery authentication by battery authentication means (382) on the accessory side in the case of a low-speed communication method.   4. The communication control unit according to claim 1, wherein the communication control unit disconnects communication with the accessory when the user's answer is that the battery is recognized as a genuine product. 5. The imaging device according to item.   When the user's response is input that the battery is not recognized as a genuine product, the user interface means that the user is requested to input the recognition about the possibility of a malfunction of the battery. The imaging apparatus according to any one of claims 1 to 3, wherein communication control is performed by the communication control unit.   6. The imaging apparatus according to claim 5, wherein communication with an accessory is performed when an input indicating that a user's answer recognizes a malfunction of the battery is performed.   The imaging apparatus according to claim 5, wherein communication with the accessory is disconnected when an input indicating that the user's answer does not recognize a malfunction of the battery is made.