JP2005176519A - Imaging device, power supply voltage alarming method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging device that allows the power consumption of the whole imaging device to be grasped at a body side even if any type of an attachment is attached to a body, and enables the time from alarming to the stop of power supply to be fixed. <P>SOLUTION: The body of the imaging device comprises: a body power supply circuit 4; a voltage comparison part 5; a reduced voltage generation part 6; a reduced voltage alarming part 7; a power supply shut-off part 8; and an operation part 11. The attachment comprises: an attachment power supply circuit 3; a storing part 9; and a transfer part 10. Data indicating the power consumption of the attachment stored in the storing part 9 of the attachment is transferred to the body, the power consumptions of the body and the attachment are calculated on the basis of data that indicate the power consumption of the attachment by the operation part 11 of the body, the reduced voltage is generated on the basis of the whole power consumption by the reduced voltage generation part 6, and when it is determined that the power supply voltage has reached the reduced voltage by the voltage comparison part 5, an alarm is issued from the reduced voltage alarming part 7, whereby the the power supplies of the body and the attachment are shut off by the power supply shut-off part 8 after the alarm is issued. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a portable imaging device driven by a battery such as a digital camera or a camcorder, a power supply voltage warning method, and a program.

  2. Description of the Related Art Conventionally, there is an image pickup apparatus that includes an accessory replacement mechanism that enables an accessory to be attached to and detached from the main body, and that supplies power from the main body to the accessory in a state where the accessory is attached to the main body.

  FIG. 6 is a block diagram illustrating a configuration of an imaging apparatus according to a conventional example.

  In FIG. 6, the imaging apparatus includes an imaging apparatus main body including a main body power circuit 24, a voltage comparison unit 25, a reduced voltage generation unit 26, a reduced power warning unit 27, and a power shutoff unit 28, and the imaging device body and accessories. And a joint portion 21 for connecting the two. The accessory includes an accessory power supply circuit 23. Reference numeral 22 denotes a battery.

  The power of the battery 22 is supplied to the main body power circuit 24 of the image pickup apparatus main body, and is also supplied to the accessory power supply circuit 23 via the image pickup apparatus main body and the joint 21. At the same time, the power supply of the battery 22 is input to the voltage comparison unit 25 of the imaging device main body in order to detect the reduced power state (how much the power supply voltage is reduced) of the battery 22. The voltage comparison unit 25 monitors the power supply voltage of the battery 22 by comparing the power supply voltage input from the battery 22 and the power supply voltage input from the power reduction voltage generation unit 26, and reduces the power consumption of the battery 22. Detect state.

  The power reduction warning unit 27 issues a power reduction warning according to the power reduction state of the battery 22 detected by the voltage comparison unit 25. After a predetermined time (for example, several minutes) has elapsed, the power supply shutoff unit 28 causes the imaging apparatus main body and accessories. Shut off the power.

  A plurality of accessories (for example, accessory 1 and accessory 2) with different power consumption can be attached to and detached from the imaging apparatus main body individually via the joint portion 21.

  FIG. 7 is a diagram showing the relationship between the drive time of the imaging device of FIG. 6 and the power supply voltage of the battery.

  In FIG. 7, the power consumption of the accessory 1 and the accessory 2 that can be attached to and detached from the imaging apparatus main body is different, and the characteristic indicated by the solid line is the case of the accessory 1, and the characteristic indicated by the one-dot chain line is the case of the accessory 2. is there. Also, Vo is a power reduction warning voltage, V1 is a power supply shutoff voltage, t0 is a power reduction warning time in the case of accessory 1, t1 is a power supply shutoff time in the case of accessory 1, and t2 is a case of accessory 2. The power reduction warning time, t3, is the power shutoff time in the case of the accessory 2.

As another conventional example, there has been proposed an imaging device (camera) that enables quick processing such as photometry and AF operation by reducing current consumption and useless communication time (for example, Patent Document 1). reference).
JP-A-8-82827

  However, in the above-described conventional imaging apparatus, the imaging apparatus main body cannot know the power consumption of the accessory, and thus cannot grasp the power consumption of the entire imaging apparatus. For this reason, when an accessory attached to the imaging device is replaced with another accessory, the time from the power reduction warning to the power shutoff is not constant (the power is shut off after a certain time from the power reduction warning). )) The power reduction warning was very inaccurate.

  That is, when the power consumption of the accessory 1 and the accessory 2 is different as shown in the characteristic of the relationship between the driving time of the imaging device and the power supply voltage of the battery in FIG. The relationship between the time from the power reduction warning time t0 of the product 1 to the power supply shutoff time t1 and the time from the power reduction warning time t2 to the power supply shutoff time t3 of the accessory 2 is t1−t0 ≠ t3−t2. , Not constant.

  The object of the present invention is to make it possible to grasp the power consumption of the entire imaging apparatus on the main body side regardless of what accessories are attached to the main body, and to make the time from the warning to the stop of power supply constant. An apparatus, a power supply voltage warning method, and a program are provided.

  In order to achieve the above-described object, the present invention provides an imaging apparatus for supplying power to a main body and an accessory detachably attached to the main body, and the accessory indicates power consumption of the accessory. Storage means for storing information, and transfer means for transferring information indicating the power consumption of the accessory to the main body, wherein the main body is information indicating the power consumption of the accessory transferred from the accessory. Based on a calculation means for calculating the total power consumption of the main body and the accessory, a generation means for generating a warning voltage based on a calculation result by the calculation means, and a warning control according to a comparison result between the warning voltage and the power supply voltage And a control means for performing power supply control.

  In order to achieve the above-described object, the present invention provides an imaging apparatus for supplying power to a main body and an accessory detachably attached to the main body, wherein the accessory is information indicating a type of the accessory. Storage means for storing information and transfer means for transferring information indicating the type of accessory to the main body, and the main body calculates the total power consumption of the main body and the accessory for each type of accessory. Storage means for storing calculation information for performing search, calculation information corresponding to information indicating the type of the accessory transferred from the accessory is retrieved from the storage means, and based on the calculation information, the main body and the accessory Calculating means for calculating the total power consumption of the product, generating means for generating a warning voltage based on a calculation result by the calculating means, and performing warning control and power supply control according to a comparison result between the warning voltage and the power supply voltage Control means Characterized in that it obtain.

  Further, the present invention is characterized in that the generating means changes the warning voltage according to a value of total power consumption of the main body and the accessory calculated by the calculating means.

  Further, the present invention provides warning means for warning that the power supply voltage has reached the warning voltage when the control means determines that the power supply voltage has reached the warning voltage, and a predetermined time after the warning. And stop means for stopping power supply to the main body and the accessory.

  In the present invention, a plurality of accessories can be individually attached to and detached from the main body, and the generating means is configured to perform the warning from the point of time when the warning is performed when each of the accessories is attached to the main body. The warning voltage is generated so that the time until the power supply to the accessory is stopped is constant.

  In the invention, it is preferable that the accessory is selected from the group including an interchangeable lens, a video light, a strobe, and a microphone.

  Furthermore, the present invention provides an imaging apparatus that supplies power to a main body and an accessory that is detachably attached to the main body, wherein the accessory includes information indicating a type of the accessory stored in the accessory. Transferred to the main body, the main body from the storage means storing the information indicating the power consumption of the accessory for each type of the accessory, the power consumption of the accessory corresponding to the information indicating the type of the accessory The information indicating the power consumption of the accessory is calculated, the total power consumption of the main body and the accessory is calculated based on the information indicating the power consumption of the accessory, a warning voltage is generated based on the calculation result, and the warning voltage and the power supply voltage It is good also as a structure which performs warning control and power supply control according to a comparison result.

  According to the present invention, the main body of the imaging device calculates the total power consumption of the main body and the accessory based on the information indicating the power consumption of the accessory transferred from the accessory, generates a warning voltage based on the calculation result, Warning control and power supply control are performed according to the comparison result between the warning voltage and the power supply voltage, so whatever accessories are attached to the main body of the imaging device, the accessories transferred from the accessories on the main body side Since the power consumption of the entire imaging apparatus can be grasped based on the information indicating the power consumption of the power supply, more accurate power supply voltage warning and power supply control processing can be performed.

  Further, according to the present invention, the main body of the imaging device searches the storage means for calculation information corresponding to information indicating the type of accessory transferred from the accessory, and based on the calculation information, the entire consumption of the main body and the accessory Power is calculated, warning voltage is generated based on the calculation result, and warning control and power supply control are performed according to the comparison result between warning voltage and power supply voltage, so what accessories are attached to the main body of the imaging device Even in this case, the main body side can grasp the power consumption of the entire imaging device based on the information indicating the type of accessory transferred from the accessory, so that more accurate power supply voltage warning and power supply control processing are performed. It becomes possible.

  In addition, according to the present invention, the warning voltage is changed according to the value of the total power consumption of the main body and accessories. Therefore, even when any accessory is attached to the main body of the imaging device, more accurate power supply voltage warning processing is performed. Can be performed.

  In addition, according to the present invention, the power supply voltage is warned that the warning voltage has been reached, and the power supply to the main body and accessories is stopped after a predetermined time from the warning. Even in this case, it is possible to perform more accurate power supply voltage warning and power supply stop processing.

  In addition, according to the present invention, when each accessory is attached to the main body, the warning voltage is generated so that the time from when the warning is performed to when the power supply to the main body and the accessory is stopped is constant. Therefore, no matter what accessories are attached to the main body of the imaging device, more accurate power supply voltage warning and power supply stop processing can be performed, and the time from warning to power supply stop is always constant. It becomes possible. Thereby, the usability of the imaging device can be improved.

  In addition, according to the present invention, it is possible to perform more accurate power supply voltage warning and power supply stop processing even when any of an interchangeable lens, video light, strobe, and microphone is attached to the main body of the imaging device. Become.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a block diagram showing the configuration of the imaging apparatus according to the first embodiment of the present invention.

  In FIG. 1, the imaging apparatus includes a main body power circuit 4, a voltage comparison unit 5 (control unit), a reduced voltage generation unit 6 (generation unit), a reduced power warning unit 7 (warning unit), and a power shutoff unit 8 (stop). Means), an imaging apparatus main body incorporating a calculation unit 11 (calculation means), and a joint 1 for connecting the imaging apparatus main body and accessories. The accessory includes an accessory power supply circuit 3, a storage unit 9 (storage unit), and a transfer unit 10 (transfer unit). Reference numeral 2 denotes a battery.

  In the image pickup apparatus main body, the main body power supply circuit 4 is connected to the battery 2 and supplies power to each part of the image pickup apparatus main body based on the power supply from the battery 2. The voltage comparison unit 5 is connected to the battery 2, the reduced voltage generation unit 6, the reduced voltage warning unit 7, and the power supply shutoff unit 8, and the power supply voltage input from the battery 2 and the reduced voltage generation unit 6 It compares the input low voltage warning voltage (hereinafter, abbreviated as low voltage) and detects whether or not the battery 2 is in a low voltage state (a state where the power supply voltage is reduced to the reduced voltage). The reduced voltage generation unit 6 is connected to the calculation unit 11, and based on the value of the total power consumption of the imaging apparatus main body and accessories calculated by the calculation unit 11, a reduced voltage (a warning that the power supply voltage has decreased) is provided. The voltage to be reduced is changed according to the value of the total power consumption of the image pickup apparatus main body and accessories.

  The power reduction warning unit 7 warns that the battery 2 is in a reduced power state based on the detection result by the voltage comparison unit 5. The power supply shutoff unit 8 shuts off the power supply of the image pickup apparatus main body and accessories after a predetermined time (for example, several minutes) has passed since the warning by the power reduction warning unit 7. The computing unit 11 is connected to the accessory transfer unit 10, and based on the power consumption of the accessory transferred from the transfer unit 10 and the power consumption of the imaging device body, the total power consumption of the imaging device body and the accessory Is calculated.

  In the accessory, the accessory power supply circuit 3 is connected to the battery 2 and supplies power to each part of the accessory based on the power supply from the battery 2. The storage unit 9 stores data indicating the power consumption of accessories. The transfer unit 10 is connected to the storage unit 9 and transfers data indicating the power consumption of the accessory to the calculation unit 11 of the imaging apparatus main body.

  A plurality of accessories (for example, accessory 1 and accessory 2) having different power consumptions can be individually attached to and detached from the imaging apparatus main body via the joint portion 1.

  Next, a power reduction warning process in the imaging apparatus of the present embodiment having the above configuration will be described with reference to the flowchart of FIG. 2 and FIG.

  When a user attaches an accessory (for example, accessory 1) to the imaging apparatus body via the joint 1 and turns on the power switch (not shown) of the imaging apparatus body, the main body power circuit 4 of the imaging apparatus body from the battery 2 is supplied. Power is supplied to the accessory power supply circuit 3 of the accessory. As a result, power is supplied to each part of the imaging apparatus main body by the main body power supply circuit 4, and power is supplied to each part of the accessory by the accessory power supply circuit 3 (step S1).

  Thereafter, during use of the imaging apparatus, the accessory transfer unit 10 reads data indicating the power consumption of the accessory stored in the storage unit 9 and transfers the data to the arithmetic unit 11 of the imaging apparatus body (step S2). Thus, the calculation unit 11 calculates the total power consumption of the imaging device main body and the accessory from the data indicating the power consumption of the accessory transferred from the transfer unit 10 and the data indicating the power consumption accompanying the power consumption of the imaging device main body. Calculation is performed (step S3). The reduced voltage generation unit 6 generates a reduced voltage according to the calculation result of the calculation unit 11 (step S4) and outputs the reduced voltage to the voltage comparison unit 5.

  The voltage comparison unit 5 compares the power supply voltage input from the battery 2 with the power reduction voltage input from the reduced voltage generation unit 6, and the power reduction state of the battery 2, that is, the power supply voltage of the battery 2 is reduced. It is determined whether the electric voltage has been reached (step S5). When the power supply voltage reaches the reduced voltage, the voltage comparison unit 5 operates the reduced power warning unit 7 and the power supply shutoff unit 8. As a result, the power reduction warning unit 7 warns that the battery 2 is in a reduced power state (step S6), and the power shutoff unit 8 performs a predetermined time (for example, several minutes) from the warning by the power reduction warning unit 7. After the elapse of time, the power supply of the image pickup apparatus main body and accessories is shut off (step S7).

  The operation when the accessory 2 is attached to the imaging apparatus main body is the same as that of the accessory 1.

  FIG. 3 is a diagram showing the relationship between the drive time of the imaging apparatus of FIG. 1 and the power supply voltage of the battery.

  In FIG. 3, the power consumption of the accessory 1 and the accessory 2 that can be attached to and detached from the imaging apparatus main body is different. The characteristic indicated by the solid line is the case of the accessory 1, and the characteristic indicated by the one-dot chain line is the case of the accessory 2. is there. In addition, Vo is a power reduction warning voltage in the case of accessory 1, V1 is a power shut-off voltage common to accessories 1 and 2, V2 is a power reduction warning voltage in the case of accessory 2, and t0 is accessory 1 , T1 is a power shut-off time for the accessory 1, t4 is a power shut-off warning time for the accessory 2, and t3 is a power shut-off time for the accessory 2.

  That is, in the present embodiment, as described above, the data indicating the power consumption of the accessory is stored on the accessory side and transferred to the imaging device main body, and the power consumption of the accessory and the imaging device main body on the imaging device main body side are stored. Calculate the total power consumption of the imaging device main body and accessories from the power consumption, and detect the reduced power state of the battery 2 based on the comparison between the reduced voltage corresponding to the obtained total power consumption and the power supply voltage of the battery 2, As shown in FIG. 3, even if the power consumption of the accessory 1 and the accessory 2 is different because the power reduction warning and the power shutoff are performed, as shown in FIG. 3, from the power reduction warning time t0 of the accessory 1 to the power shutoff time t1. The relationship between the time and the time from the power-reduction warning time t4 of the accessory 2 to the power supply shut-off time t3 can be kept constant at t1-t0 = t3-t4.

  In this case, a reduced voltage is generated from the reduced voltage generator 6 so that the time from the reduced power warning time to the power shut-off time is constant when each accessory is attached to the imaging apparatus main body. .

  As described above, according to the present embodiment, regardless of what accessories are attached to the imaging apparatus body, the imaging apparatus body side stores data indicating the power consumption of the accessories transferred from the accessories. Since the power consumption of the entire imaging device can be grasped based on this, more accurate power supply voltage warning and power supply stop processing can be performed, and the time from power reduction warning to power shutoff is always constant. It becomes possible to do. Thereby, the usability of the imaging device can be improved.

[Second Embodiment]
FIG. 4 is a block diagram showing a configuration of an imaging apparatus according to the second embodiment of the present invention.

  In FIG. 4, the imaging apparatus includes a main body power circuit 4, a voltage comparison unit 5 (control unit), a reduced voltage generation unit 6 (generation unit), a reduced power warning unit 7 (warning unit), and a power shutoff unit 8 (stop). Means), a calculation unit 11 (calculation unit), a storage unit (database) 13 (storage unit), and a joint unit 1 that connects the imaging device body and accessories. The accessory includes an accessory power supply circuit 3, a storage unit 12 (storage unit), and a transfer unit 10 (transfer unit).

  This embodiment is different from the above-described first embodiment in that a storage unit (database) 13 is added to the imaging apparatus main body, and a storage unit 12 is provided instead of the storage unit 9 as an accessory. To do. The other elements of the present embodiment are the same as the corresponding elements of the first embodiment (FIG. 1) described above, and therefore the same elements are denoted by the same reference numerals and description thereof is omitted.

  The accessory storage unit 12 stores data indicating the type of accessory. The storage unit (database) 13 of the imaging apparatus main body stores data for calculating the total power consumption of the imaging apparatus main body and the accessories, corresponding to the data indicating the types of accessories. The calculation unit 11 searches the storage unit (database) 13 based on the data indicating the accessory type transferred from the accessory transfer unit 10, and based on the data read from the storage unit (database) 13, the imaging device Calculate the total power consumption of the main unit and accessories.

  A plurality of accessories (for example, accessory 1 and accessory 2) having different power consumptions can be individually attached to and detached from the imaging apparatus main body via the joint portion 1.

  Next, a power reduction warning process in the imaging apparatus of the present embodiment having the above configuration will be described with reference to the flowchart of FIG. 5 and FIG.

  When a user attaches an accessory (for example, accessory 1) to the imaging apparatus body via the joint 1 and turns on the power switch (not shown) of the imaging apparatus body, the main body power circuit 4 of the imaging apparatus body from the battery 2 is supplied. Power is supplied to the accessory power supply circuit 3 of the accessory. As a result, power is supplied to each part of the imaging apparatus main body by the main body power supply circuit 4, and power is supplied to each part of the accessory by the accessory power supply circuit 3 (step S11).

  Thereafter, during use of the imaging device, the accessory transfer unit 10 reads data indicating the type of accessory stored in the storage unit 9 and transfers the data to the calculation unit 11 of the imaging device body (step S12). Thereby, the calculation unit 11 searches the storage unit (database) 13 based on the data indicating the type of accessory transferred from the transfer unit 10 and calculates the total power consumption of the imaging apparatus main body and the accessory. Data is read (step S13), and based on the read data, the total power consumption of the imaging apparatus main body and accessories is calculated (step S14). The reduced voltage generation unit 6 generates a reduced voltage according to the calculation result of the calculation unit 11 (step S15) and outputs the reduced voltage to the voltage comparison unit 5.

  The voltage comparison unit 5 compares the power supply voltage input from the battery 2 with the power reduction voltage input from the reduced voltage generation unit 6, and the power reduction state of the battery 2, that is, the power supply voltage of the battery 2 is reduced. It is determined whether the electric voltage has been reached (step S16). When the power supply voltage reaches the reduced voltage, the voltage comparison unit 5 operates the reduced power warning unit 7 and the power supply shutoff unit 8. Thereby, the power reduction warning unit 7 warns that the battery 2 is in a reduced power state (step S17), and the power shutoff unit 8 performs a predetermined time (for example, several minutes) from the warning by the power reduction warning unit 7. After the elapse of time, the power supply of the image pickup apparatus main body and accessories is shut off (step S18).

  The operation when the accessory 2 is attached to the imaging apparatus main body is the same as that of the accessory 1.

  That is, in the present embodiment, as described above, the data indicating the type of accessory is stored on the accessory side and transferred to the imaging apparatus main body, and based on the data indicating the type of accessory on the imaging apparatus main body side, Data for calculating the total power consumption of the imaging apparatus main body and accessories is read from the storage unit 13, and the total power consumption of the imaging apparatus main body and accessories is calculated based on the data, corresponding to the obtained total power consumption. Even if the power consumption of the accessory 1 and the accessory 2 is different because the power-down warning of the battery 2 is detected based on the comparison between the power-reduction voltage and the power-supply voltage of the battery 2, and the power-reduction warning and power-off are performed. 3, the relationship between the time from the power reduction warning time t0 of the accessory 1 to the power supply shutoff time t1 and the time from the power reduction warning time t4 of the accessory 2 to the power supply shutoff time t3 is shown. , T1-t0 = t3-t4, always one It is possible to be.

  As described above, according to the present embodiment, whatever kind of accessories are attached to the imaging apparatus body, the imaging apparatus body side uses data indicating the type of accessory transferred from the accessory. In addition, the power consumption of the entire imaging device can be ascertained, so that more accurate power supply voltage warning and power supply stop processing can be performed, and the time from power reduction warning to power shutoff is always constant. It becomes possible. Thereby, the usability of the imaging device can be improved.

[Other embodiments]
In the first and second embodiments, the type of accessory that can be attached to and detached from the imaging apparatus main body is not particularly mentioned, but the type of accessory is not limited to a specific type, and an interchangeable lens. It can be applied to various accessories such as video lights, strobes, and microphones.

  In the first and second embodiments, the case where one joint portion is installed in the imaging apparatus main body has been described as an example. However, the number of joint sections is not limited to one, and the imaging apparatus main body is not limited to one. A plurality of joints are installed, and data indicating the power consumption of accessories attached to each joint or data indicating the type of accessory is transferred to the imaging apparatus body, and the imaging apparatus body is based on the transferred data. It is also applicable to the case where the power consumption warning and power supply shutoff control are performed based on the comparison between the power reduction voltage and the power supply voltage according to the calculation result.

  In the first and second embodiments, the type of the imaging device is not particularly mentioned, but the type of the imaging device is not limited to a specific type, and various types of imaging such as a digital camera and a camcorder. Applicable to the device.

  In the second embodiment, the storage unit of the imaging apparatus main body stores data for calculating the total power consumption of the imaging apparatus main body and accessories corresponding to the data indicating the type of accessory, and the accessory Based on the data read from the storage unit based on the data indicating the type of accessories transferred from the storage unit, the case where the total power consumption of the imaging device main unit and accessories is calculated is taken as an example. Rather, store the data indicating the power consumption of accessories corresponding to the data indicating the type of accessory in the storage unit of the imaging device, and based on the data indicating the type of accessory transferred from the accessory Based on the power consumption of the accessory read from the storage unit and the power consumption of the imaging device main body, the total power consumption of the imaging device main body and the accessory may be calculated.

  The present invention supplies a software program (flowcharts in FIGS. 2 and 5) that realizes the functions of the above-described embodiments to a computer or CPU, and the computer or CPU reads and executes the supplied program. Can be achieved.

  In this case, the program is directly supplied from a storage medium storing the program, or downloaded from another computer or database (not shown) connected to the Internet, a commercial network, a local area network, or the like. Supplied.

  The form of the program may be in the form of object code, program code executed by an interpreter, script data supplied to an OS (operating system), and the like.

  The present invention also supplies a computer or CPU with a storage medium storing a software program that implements the functions of the above-described embodiments, and the computer or CPU reads and executes the program stored in the storage medium. Can also be achieved.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.

  As a storage medium for storing the program code, for example, ROM, RAM, NV-RAM, floppy (registered trademark) disk, hard disk, optical disk (registered trademark), magneto-optical disk, CD-ROM, MO, CD-R, CD -RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW, magnetic tape, nonvolatile memory card, etc.

  The function of the above-described embodiment is not only by executing the program code read from the computer, but the OS or the like running on the computer performs part or all of the actual processing based on the instruction of the program code. Can also be realized.

1 is a block diagram illustrating a configuration of an imaging apparatus according to a first embodiment of the present invention. 3 is a flowchart illustrating a power reduction warning process of the imaging apparatus in FIG. 1. It is a figure which shows the relationship between the drive time of the imaging device of FIG. 1, and the power supply voltage of a battery. It is a block diagram which shows the structure of the imaging device which concerns on the 2nd Embodiment of this invention. 6 is a flowchart illustrating a power reduction warning process of the imaging apparatus of FIG. It is a block diagram which shows the structure of the imaging device which concerns on a prior art example. It is a figure which shows the relationship between the drive time of the imaging device of FIG. 6, and the power supply voltage of a battery.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Junction part 2 Battery 3 Accessory power supply circuit 4 Main body power supply circuit 5 Voltage comparison part 6 Reduced voltage generation part 7 Reduced voltage warning part 8 Power supply shutoff part 9 Storage part 10 Transfer part 11 Computation part accessory power supply circuit 12 Storage part 13 Memory unit

Claims (10)

An imaging apparatus for supplying power to a main body and accessories detachably attached to the main body,
The accessory includes storage means for storing information indicating power consumption of the accessory, and transfer means for transferring information indicating power consumption of the accessory to the main body.
The main body is configured to calculate a total power consumption of the main body and the accessory based on information indicating the power consumption of the accessory transferred from the accessory; and a warning voltage based on a calculation result by the calculation means. An imaging apparatus comprising: generating means for generating; and control means for performing warning control and power supply control according to a comparison result between the warning voltage and the power supply voltage. An imaging apparatus for supplying power to a main body and accessories detachably attached to the main body,
The accessory includes storage means for storing information indicating the type of the accessory, and transfer means for transferring information indicating the type of the accessory to the main body.
The main body stores storage information for calculating total power consumption of the main body and the accessory for each type of the accessory, and information indicating the type of the accessory transferred from the accessory Calculating means corresponding to the storage means, calculating means for calculating the total power consumption of the main body and the accessory based on the calculated information, and generating means for generating a warning voltage based on the calculation result by the calculating means And an imaging device comprising: control means for performing warning control and power supply control according to a comparison result between the warning voltage and the power supply voltage.   The imaging apparatus according to claim 1, wherein the generation unit changes the warning voltage according to a value of total power consumption of the main body and the accessory calculated by the calculation unit.   When the control means determines that the power supply voltage has reached the warning voltage, warning means for warning that the power supply voltage has reached the warning voltage; and the main body and the accessory after a predetermined time from the warning The imaging apparatus according to claim 1, further comprising stop means for stopping power supply to the camera.   A plurality of accessories can be individually attached to and detached from the main body, and the generating means supplies power to the main body and the accessories from the point of time of the warning when each of the accessories is attached to the main body. The imaging apparatus according to claim 1, wherein the warning voltage is generated so that a time until the time of stopping is constant.   3. The imaging apparatus according to claim 1, wherein the accessory is selected from a group including an interchangeable lens, a video light, a strobe, and a microphone. A power supply voltage warning method for an imaging apparatus that supplies power to a main body and an accessory detachably attached to the main body,
The information indicating the power consumption of the accessory stored in the accessory is transferred to the main body, and the main body and the accessory are based on the information indicating the power consumption of the accessory transferred from the accessory in the main body. A power supply voltage warning method characterized by calculating a total power consumption of a product, generating a warning voltage based on the calculation result, and performing warning control and power supply control according to a comparison result between the warning voltage and the power supply voltage. A power supply voltage warning method for an imaging apparatus that supplies power to a main body and an accessory detachably attached to the main body,
Information indicating the type of accessory stored in the accessory is transferred to the main body, and calculation information corresponding to the information indicating the type of accessory transferred from the accessory in the main body is stored from the storage means. Search, calculate the total power consumption of the main body and accessories based on the calculation information, generate a warning voltage based on the calculation result, and perform warning control and power supply according to the comparison result between the warning voltage and the power supply voltage A power supply voltage warning method characterized by performing control. A program for causing a computer to execute a power supply voltage warning method of an imaging apparatus that supplies power to a main body and an accessory detachably attached to the main body,
A module for transferring information indicating power consumption of the accessory stored in the accessory to the main body, and the main body based on information indicating power consumption of the accessory transferred from the accessory by the main body; A module that calculates the total power consumption of the accessory, a module that generates a warning voltage based on the calculation result, and a module that performs warning control and power supply control according to a comparison result between the warning voltage and the power supply voltage A program characterized by that. A program for causing a computer to execute a power supply voltage warning method of an imaging apparatus that supplies power to a main body and an accessory detachably attached to the main body,
A module for transferring information indicating the type of accessory stored in the accessory to the main body, and calculation information corresponding to the information indicating the type of accessory transferred from the accessory in the main body is stored. A module that searches from means, a module that calculates the total power consumption of the main body and the accessory based on the calculation information, a module that generates a warning voltage based on the calculation result, and a comparison result between the warning voltage and the power supply voltage And a module that performs warning control and power supply control according to the program.

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