JP2000029088A - Electronic camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the increase of power consumption and to prevent the drop of power source voltage by making a sub control means turn off a power source for respective parts and/or a lens driving part in an electronic camera after finishing housing processing of a collapsibly mounted lens by the sub control means. SOLUTION: When a power source switch is turned off, a power source turn-off signal 212 is generated, and system finishing processing is started by a main CPU 206. Next, a processing start signal 213 is generated, and housing processing is started by a sub CPU 202a. As soon as a motor 202c starts rotation with the start of the housing processing, a standby designating signal is outputted from the sub CPU 202a to the main CPU 206, and a lens driving power source maintaining signal 211b from the sub CPU 202a to a power source part 201 is made active. At the time when the length of a lens barrel is the shortest, the rotation of the motor 202c is stopped and the housing processing is finished, then, the sub CPU 202a makes the signal 211b inactive so as to interrupt the supply of power to the respective parts and finish the processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic camera, and more particularly, to an electronic camera provided with an electric retractable lens (Note 1) and a zoom lens (hereinafter, referred to as an "electric photographic lens"). Note 1: A photographic lens that is pulled into the camera body when the power is not turned on, and is pulled out from the camera body when the power is turned on and becomes usable.

[0002]

2. Description of the Related Art Generally, an electronic camera converts an image of a subject captured through a photographic lens into an electric signal by an image sensor, expands the electric signal in a high-speed semiconductor memory, converts the electric signal into image data, and converts the image into white balance. Various processes such as color correction, image compression, and image size conversion are performed and displayed on a liquid crystal display or recorded in a nonvolatile semiconductor memory. Many of the above various processes (hereinafter referred to as “main processes” for the sake of convenience) are mostly microcomputers (hereinafter referred to as CPU
However, in recent years, the number of pixels of the image has been increasing more and more, so that the burden of the main processing is further increased and a higher performance CPU is mounted. It has become.

[0003]

However, the mounting of a high-performance CPU, on the other hand, leads to an increase in power consumption (Note 2), leading to a serious problem for an electronic camera that increases battery consumption. I have. Note 2: For example, a 32-bit RISC (reduced instrument)
ction set computer) In the case of a chip, it can be 300 mW to 600 mW.

[0004] Such a problem is particularly serious in the case of an electronic camera equipped with an electric photographic lens. In general,
2. Description of the Related Art An electric photographic lens, for example, an electric zoom lens changes the magnification of a photographic lens by extending and contracting a lens barrel with a motor. When photographing is completed and the power is turned off (turned off), a case or the like is used. In order not to disturb the storage in the camera, processing to shorten the lens barrel to the shortest length (hereinafter referred to as “storage processing”) is performed. Part of the main process is also performed (these processes are processes in the CPU).
Because. As a result, in addition to the power consumption of the CPU described above, the power consumption of the lens driving system is added.
Therefore, when the power is turned off, a sharp voltage drop may occur, and depending on the remaining capacity of the battery, the voltage may drop to a level where the operation can no longer be maintained. Since the power is cut off (hereinafter, this power cut is called “emergency power off”), for example, the image being recorded disappears, a system error occurs, or the motorized zoom lens This is because there is a problem that the storage is stopped in the middle of the storing process. Further, in the conventional electronic camera, since the sub CPU for driving the lens does not have a power control function, when the lens is stored when the power is turned off, the main CPU does not perform any processing during that time. It was turned on only to execute the power-off process after storage. Therefore, in this case, the main C
Since the driving load of the PU and the driving load of the lens are simultaneously applied, this point is also a cause of the above problem.

FIG. 8 is a block diagram of a main part of a conventional electronic camera provided with an electric photographic lens. In this figure, 1
Reference numeral 00 denotes a key block including a power switch, 101 denotes a power supply unit, 102 denotes a lens driving unit, 103 denotes an optical mechanism block including an optical lens and a lens driving mechanism, and 104 denotes a CCD (charge coupled device) as an image sensor. , 105 are CCD drive blocks. Reference numeral 106 denotes a main CPU (a CPU responsible for the above-described system termination processing and main processing, which is a high-performance CPU with large power consumption); 107, a ROM for storing various programs and data executed by the main CPU 106;
108 is an RA for loading and executing the program.
M. In addition, other than the above, a memory for image development, a flash memory for image recording, a liquid crystal display device, and control blocks for these components are also provided. However, since they are not directly related to the present invention, the description is omitted.

The power supply unit 101 comprises a power supply block 101a for supplying power to each part of the camera, and a control block (power supply control block) 101b. The power supply control block 101b receives a power-on signal from the key block 100. A power activation signal 110 for prompting activation (generation of power) of the power supply block 101a in response to the activation of the power supply block 101a is activated, and while the maintenance signal 111 output from the main CPU 106 is active, the activation of the power activation signal 110 is activated. In short, when the power switch of the key block 100 is turned on, power is immediately supplied from the power supply block 101a to the camera units, and accordingly, the operation of the camera units including the main CPU 106 is started. And the main CP
By executing the required system startup processing in U106, the maintenance signal 111 from the main CPU 106 becomes active, and thereafter, the power supply to each part of the camera is continued.

Here, when the power is turned off after photographing, first, the power switch of the key block 100 is turned off. In response to the turning-off operation, a power-off signal 112 is output from the key block 100, and the main CPU 106
Starts a required system termination process according to the power-off signal 112, but the system termination process does not include the above-described "storage process". This storage processing is performed by the CPU 1 provided in the lens driving unit 102 and having relatively low performance of about 4 to 8 bits, and
02a (hereinafter referred to as "sub CPU"), and the sub CPU 102a starts the process in response to a process start signal 113 from the main CPU 106 which is executing the system termination process. That is, sub C
The PU 102a drives the motor 102c while controlling the motor driver 102b in accordance with the processing start signal 113, and independently operates the processing operation of moving the lens driving mechanism included in the optical mechanism block 103 to reduce the length of the lens barrel to the shortest length. It is what you do.

FIG. 9 is a conceptual operation timing chart when the power is turned off, and the horizontal direction of the drawing is the time axis. First, when the power switch is turned off, (S1) a power-off signal 112 is generated, and (S2) the system termination processing is started by the main CPU 106. Next, (S3) a processing start signal 113 is generated at an appropriate point in the system termination processing,
(S4) In response to this, the storage processing is started in the sub CPU 102a. Then, (S5) the motor 102c starts rotating with the start of the storing process, and (S6) the rotation of the motor 102c stops when the length of the lens barrel becomes the shortest.
(S7) The completion of the storage process is transmitted to the main CPU 106. Lastly, (S8) the main CPU 106 waits for the completion of its own processing and then makes the maintenance signal 111 inactive, and (S9) cuts off the power supplied from the power supply block 101a to each part of the camera to perform a series of power-off processing. finish.

In FIG. 9, the section to be noted is (S5)
This is the section A from to (S6). This section A is a rotation section of the motor 102c, and
6 is a section of the system termination processing, so that the power consumption of both is added to cause a significant drop in the power supply voltage. Therefore, in this section A, when the remaining capacity of the battery is low, there is a possibility that the power supply voltage becomes lower than the operation guarantee voltage. There is a serious problem that must be solved in terms of ensuring the stability of the system.

[0010] The above-mentioned problem may become apparent not only when the power is turned off but also when the power is turned on. In an electronic camera with an electric photographic lens, when the power is turned on, initialization processing of the lens driving mechanism (processing such as finding the origin position) may be executed.
This is because the required system initialization processing is also performed in step S6.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electronic camera in which the stability of the system is improved by suppressing a decrease in the power supply voltage, thereby avoiding unintended power interruption (unintended power off). And

[0012]

According to the first aspect of the present invention,
In an electronic camera equipped with an electric retractable lens, the electronic camera includes main control means for executing processing of each section of the electronic camera, and sub-control means for executing storage processing of the retractable lens. When the storing process of the lens is being executed, the main control unit is kept in a standby state or a power-off state, and after the storing process by the sub-control unit is completed, the sub-control unit sets the electronic camera unit and / or the lens driving unit. The power supply of the unit is turned off. According to a second aspect of the present invention, in an electronic camera equipped with an electric retractable lens, main control means for executing processing of each section of the electronic camera and sub-control for executing initialization processing of a motor for driving the retractable lens. Means, when the initialization processing of the motor is executed by the sub-control means, holding the main control means in a standby state or a power-off state, after the end of the initialization processing by the sub-control means, The sub-control means releases the standby state or the power-off state of the main control means.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to a motorized digital camera with a zoom lens as an example.
This will be described with reference to the drawings. In FIG. 1, reference numeral 10 denotes a digital camera (electronic camera). Although not particularly limited, the digital camera 10 is divided into a main unit 11 and a camera unit 12 rotatably attached to the main unit 11, and an electric motor is provided on the front side (the back side in the drawing) of the camera unit 12. A zoom lens 30 of a formula (hereinafter, simply referred to as “zoom lens”) is mounted. A CCD (not shown) is attached behind the zoom lens 30. In a shooting mode described later, the image of the subject taken in from the zoom lens 30 is converted into an electric signal and a frame image of a predetermined cycle is formed. It can be generated. Note that a finder for checking the composition may be provided in the camera unit 12.

On the other hand, a flat display device, such as a liquid crystal display, for confirming an image being photographed (hereinafter referred to as a “through image”) or a recorded image (hereinafter referred to as a “recorded image”) is provided in the main body 11. In addition to the display 13 attached,
Various operation keys such as the shutter key 14 are attached at appropriate positions. Incidentally, the operation keys are, for example, a plus key 15, a minus key 16, a delete key 17, a power switch 18, a mode key 19, a display key 20, a zoom key 21, a self-timer key 22, a function switch 23, and the like. The function of is as follows.

(1) Shutter key 14: plays the role as its name in a normal photographing mode, but plays a role of an execution key of a selected function in a reproducing mode for reproducing a photographed image. (2) Plus key 15: A key for selecting a playback image in the plus direction (toward the latest image) and for moving the cursor downward or right. (3) Minus key 16: Same function as the plus key except that the direction is reversed. (4) Delete key 17: Delete key for the selected image.

(5) Power switch 18: A power on / off key, which is not particularly limited but is a return type slide switch. For example, the power is normally urged leftward by a spring, but the power can be turned on and off by sliding the finger to the right against this urging force. The power on / off depends on the previous state. That is, if the power supply is off immediately before, the power is turned on by sliding the switch 18, and if the power supply is off, the power supply is turned off in the opposite state. (6) Mode key 19: a key for selecting various functions. (7) Zoom key 21: a key for changing the magnification of the zoom lens 30. Note that at or above a predetermined magnification (for example, the maximum magnification of the zoom lens 30), it may function as a key for digital zoom. (8) Function switch 23: a slide switch for switching between a shooting mode and a playback mode. Slide up for shooting mode, slide down for playback mode.

<First Embodiment> FIG. 2 is a block diagram of a main part of the digital camera 10, and reference numeral 200 denotes a key block including a power switch (see reference numeral 18 in FIG. 1);
Reference numeral 1 denotes a power supply unit, 202 denotes a lens driving unit, 203 denotes an optical mechanism block including an optical lens and a lens driving mechanism, 204 denotes a CCD as an image sensor, and 205 denotes a CCD driving block. Reference numeral 206 denotes a main CPU (for example, a 32-bit RISC chip) as main control means;
A ROM 07 stores various programs and data to be executed by the main CPU 206, and a RAM 208 loads and executes the programs.

The power supply unit 201 includes a power supply block 201a for supplying power to each part of the camera and a control block (power supply control block) 201b. The power supply control block 201b receives a power-on signal from the key block 200. A power activation signal 210 for prompting activation (generation of power) of the power supply block 201a in response to the power supply activation signal 209 is activated, and while the power supply maintaining signal 211a output from the main CPU 206 is active, or a lens driving unit. While the lens drive power supply maintaining signal 211b from 202 is active, the power supply start signal 2
The ten actives are continued. When the power switch of the key block 200 is turned on, power is immediately supplied to each part of the camera from the power block 201a,
Along with this, the operation of each section of the camera including the main CPU 206 is started, and the main CPU 206 executes a required system start-up process.
The power supply maintaining signal 211a from the PU 206 becomes active, and thereafter, the power supply to each part of the camera can be continued.

Here, when the power is turned off after photographing, first, the power switch of the key block 200 is turned off as in the prior art. In response to this off operation, a power off signal 212 is output from the key block 200,
The main CPU 206 starts required system termination processing according to the power-off signal 212.

By the way, also in the present embodiment, as in the prior art, the above-mentioned "storage process" is not included in the system termination process. This storing process is performed by the lens driving unit 2
02, which is in charge of a relatively low-performance CPU 202a (hereinafter referred to as a "sub-CPU") having a relatively low performance of about 4 to 8 bits. Sub CPU2
02a has a function as a sub-control unit, and has a main CP
The second embodiment is common to the related art in that the process is started in response to a process start signal 213 from the U206, that is, the sub CPU 202a drives the motor 202c while controlling the motor driver 202b according to the process start signal 213, and This is the same as the related art at the beginning in that the processing operation of moving the lens driving mechanism included in the mechanical block 203 to reduce the length of the lens barrel to the shortest length is performed independently, but in terms of the start timing of the storage processing. Different.

FIG. 3 is a conceptual operation timing chart when the power is turned off in the present embodiment, and the horizontal direction in the drawing is the time axis. First, when the power switch is turned off, (S11) a power-off signal 212 is generated, and (S1)
2) The system termination process is started by the main CPU 206. Next, (S13) a processing start signal 213 is generated at an appropriate point in the system termination processing, and (S14) the storage processing is started by the sub CPU 202a in response to this.

(S15a) When the motor 202c starts rotating with the start of the storing process, at the same time (S15b) the sub CPU 202a outputs a standby instruction signal (see reference numeral 214 in FIG. 2) to the main CPU 206, and A lens drive power supply maintaining signal 211b from the CPU 202a to the power supply unit 201 is activated. In response to the instruction signal 214, the main CPU 206 shifts the clock speed or deactivates some circuits to shift to a standby state to reduce power consumption, while the power supply unit 201 outputs the lens drive power supply maintaining signal 211b. The power supply to each part is continued according to the above.

(S16) When the length of the lens barrel becomes the shortest, the rotation of the motor 202c stops, and (S1)
7) When the storage process is completed, (S18) the sub CPU 2
In step 02a, the lens drive power supply maintaining signal 211b is made inactive to cut off power supply to each unit, and a series of processing ends.

In FIG. 3, A 'is a rotation section of the motor 202c. As is clear from the figure, this section A '
Then, since the main CPU 206 is in the standby state,
Power is consumed exclusively by the motor 202c. Therefore, the power consumption in the section A ′ can be significantly suppressed (at least the difference between the drive power of the main CPU 206 and the standby power) can be suppressed as compared with the related art, and the decrease in the power supply voltage can be suppressed. This has a particularly beneficial effect on system stability in that "power off" can be avoided.

The technical idea in the present embodiment devised to obtain such an effect is, in short, a main CPU.
High load processing (system termination processing) at 206 and high load processing (zoom lens 3) at the sub CPU 202a.
(Storage processing of 0) and the execution timing of the two are arbitrated to avoid the overlapping operation, that is, to avoid the overlap.
During high load processing in the sub CPU 202a, the main CP
By placing the U206 in the standby or off state, the load of the main CPU 206 itself and the sub CPU
This is to avoid simultaneous application of the high load in 202a. The means for performing the avoidance operation can be realized by a complex element including the following points, for example.

(A) Signal for maintaining power supply to the motor 202c (lens drive power supply maintenance signal 211b)
Is provided. As described above, this signal 211b is a signal that becomes active while the motor 202c is rotating, and is a signal for complementing the power supply maintaining signal 211a from the main CPU 206. That is, the power supply maintaining signal 211a
When the main CPU 206 shifts to the standby state, it becomes inactive. If the main CPU 206 shifts to the standby state, power supply from the power supply unit 201 to each unit is cut off simultaneously with the shift to the standby state. However, if the above-described lens drive power supply maintaining signal 211b is provided, even if the power supply maintaining signal 211a becomes inactive, power supply to each unit (particularly, the lens driving unit 202) is performed. Can be continued.

(B) The power supply control block 201b is provided with a circuit (see reference numeral 215 in FIG. 2) for receiving the above two signals (the power supply maintenance signal 211a and the lens drive power supply maintenance signal 211b). The functions that the circuit 215 should have are “power sustain signal 211a and lens drive power sustain signal 211b”.
While one of them is active, the power activation signal 210
And the power generation in the power supply block 201a is continued ". For example, if the active logic is set to" 1 ", the power supply maintenance signal 211a and the lens drive power supply maintenance signal 211b are simply It is equivalent to taking OR logic.

(C) The sub CPU 202a is provided with a function (see reference numeral 216 in FIG. 2) for generating the lens drive power supply maintaining signal 211b. The function 216 is realized by software on the sub CPU 202a, but may be realized by hardware logic or the like.

By the way, in the above embodiment,
This is advantageous in that “unscheduled power-off” at power-off can be avoided, but there is room for improvement in that “unscheduled power-off” at power-on cannot be avoided.

<Second Embodiment> FIG. 4 shows an improved example in which "emergency power-off" at power-on can be avoided in addition to power-off. The difference is that the standby return signal 217 can be output from the sub CPU 202a to the main CPU 206, and this signal 217 is received by the signal input unit 218 of the main CPU 206 so that the main CPU 206 can be operated normally.

FIG. 5 is a conceptual operation timing chart when the power is turned on in the present embodiment, and the horizontal direction of the drawing is the time axis. First, when the power switch is turned on, (S21) a power-on signal 212 is generated, and (S2)
2) Power is supplied from the power supply unit 201 to each unit. Then, (S23) the system initialization process is started by the main CPU 206, and (S24) a process start signal 213 is generated at an appropriate point in the system initialization process. (S25) In response to this, the sub CPU 202a initializes the zoom lens. The conversion process (such as the process of locating the origin) is started.

(S26a) When the motor 202c starts rotating with the start of the zoom lens initialization processing,
(S26b) Sub CPU 202a to Main CPU 20
6, the standby instruction signal 214 is output, and the lens drive power supply maintaining signal 211b from the sub CPU 202a to the power supply unit 201 is activated. Main CPU
In response to the instruction signal 214, a clock speed is reduced or some circuits are deactivated to shift to a standby state to reduce power consumption.
Numeral 1 continues power supply to each unit according to the lens drive power supply maintenance signal 211b.

(S27) When the length of the lens barrel reaches a predetermined length (a length corresponding to the origin position), the motor 20
When the rotation of the zoom lens 2c is stopped and the (S28) zoom lens initialization processing is completed, the sub CPU 202a
A standby return signal 217 is output to 206, and a series of processing ends.

Therefore, in this embodiment,
As in the first embodiment, "emergency power-off" at power-on can be avoided, and as shown in FIG. 5, the main CPU 206 can be set to the standby state during rotation of the motor 202c at power-on. This is excellent in that a special effect is obtained in that the power consumption in the rotation section (A ″) can be suppressed and “unintended power-off” when the power is turned on can be avoided.

<Third Embodiment> Some CPUs do not have a standby function, and the above embodiments cannot be applied to this kind of CPU. In FIG. 6, reference numeral 300 denotes a main CPU having no standby function, 301 denotes a power supply block for outputting power of at least two systems a and b, 302 denotes a power supply control block, and other elements include the first embodiment ( It is the same as FIG.

The power supply block 301 is composed of at least first and second blocks 301a and 301b. The first block 301a keeps the power supply of the system a (the main CPU 300 and the main CPU 300) while the first power supply start signal 210a is active. And a second block 301b
While the second power activation signal 210b is active, b
A power supply for the system (power supply for the lens driving unit including the sub CPU 202a) is generated. In addition, the power control block 302
While the power maintaining signal 211a from the main CPU 300 is active, the first circuit 215a for activating the first power activation signal 210a and the lens driving power maintaining signal 211b from the sub CPU 202a are active.
And a second circuit 215b for activating the second power supply activation signal 210b.

Therefore, according to the present embodiment, while the power supply maintaining signal 211a from the main CPU 300 is active, the first power supply activation signal 210a becomes active to generate an a-system power supply.
0 and the peripheral circuits thereof can be continuously supplied. On the other hand, while the lens drive power supply maintaining signal 211b from the sub CPU 202a is active (while the motor 202c is rotating), the second power supply activation signal 210b is supplied. The sub CPU 202 c
Power can be continuously supplied to the lens driving unit including
A predetermined control signal (for convenience, referred to as a standby instruction signal 214 of the first embodiment) is output to the PU 300, and in response to the control signal, the power supply maintaining signal 211a from the main CPU 300 is made inactive. Accordingly, the first power supply activation signal 210a can be made inactive to shut off the power supply of the system a, that is, the power supply for the main CPU 300 and its peripheral circuits. Even if the main CPU 300 has no standby function, Main CPU3
00 and its peripheral circuits are made inoperative, so that the same effect as that of the first embodiment (a “power-off at power-on” can be avoided) can be obtained. Note that, at the same time when the processing start signal 213 is generated at the end of the above-described system end processing, the power supply maintaining signal 211a may be made inactive.

<Fourth Embodiment> This embodiment is different from the first embodiment in that
The third embodiment is improved so as to avoid "unintended power-off" when the power is turned on. The difference from the third embodiment is that, as shown in FIG.
202a to the third circuit 21 of the power control block 302
5c, a zoom lens drive completion signal 211c can be output.
The first power supply activation signal 210a can be returned from inactive to active in response to the activation of 11c.

According to this example, the first power supply start signal 21
After inactivating 0a and shutting off the power supply of system a,
By outputting the zoom lens drive completion signal 211c at an appropriate time, the first power supply activation signal 210a can be returned to the active state. Therefore, the main C
Since the power for the PU 300 and its peripheral circuits can be generated again, the "emergency power off" when the power is turned on.
Can also be avoided.

[0040]

According to the first aspect of the present invention, in an electronic camera provided with an electric retractable lens, main control means for executing processing of each section of the electronic camera and executing storage processing of the retractable lens. Sub-control means, and when the retracting process of the retractable lens is being executed by the sub-control means, the main control means is kept in a standby state or a power-off state, and the storing processing by the sub-control means is terminated. rear,
Since the sub-control unit turns off the power of each part of the electronic camera and / or the lens driving unit, during the retracting process of the retractable lens, the main control unit is in the standby state or the power-off state, and the two power-consuming two The superimposed operation of the blocks can be avoided, an increase in power consumption can be prevented, and a decrease in power supply voltage can be suppressed. Therefore, for example, it is possible to avoid "unintended power-off" when the remaining capacity of the battery is low, and to improve the system stability. According to the invention described in claim 2, in an electronic camera equipped with an electric retractable lens, main control means for executing processing of each section of the electronic camera;
Sub-control means for performing initialization processing of a motor for driving the collapsible lens, and when the initialization processing of the motor is being executed by the sub-control means, the main control means is in a standby state or powered off. After the initialization processing by the sub-control means is completed, the sub-control means releases the standby state or the power-off state of the main control means. The means is in a standby state or a power-off state, so that the superimposed operation of two blocks consuming a large amount of power can be avoided, and in particular, the "unintended power-off" at the time of power-on can be avoided to improve system stability. Can be.

[Brief description of the drawings]

FIG. 1 is an external view of a digital camera.

FIG. 2 is a block diagram of the first embodiment.

FIG. 3 is a timing chart of the first embodiment.

FIG. 4 is a block diagram of a second embodiment.

FIG. 5 is a timing chart of the second embodiment.

FIG. 6 is a block diagram of a third embodiment.

FIG. 7 is a block diagram of a fourth embodiment.

FIG. 8 is a block diagram of a conventional example.

FIG. 9 is a timing chart of a conventional example.

[Explanation of symbols]

 Reference Signs List 10 digital camera (electronic camera) 30 zoom lens 202a sub CPU (sub control means) 206 main CPU (main control means)

Claims (2)

[Claims] 1. An electronic camera provided with an electric retractable lens, comprising: main control means for executing processing of each part of the electronic camera; and sub-control means for executing storage processing of the retractable lens; When the retracting process of the retractable lens is executed by the means, the main control means is kept in a standby state or a power-off state, and after the storing processing by the sub-control means is completed, the sub-control means is controlled by the electronic camera. An electronic camera, wherein a power supply of each unit and / or a lens driving unit is turned off. 2. An electronic camera provided with an electric retractable lens, comprising: main control means for executing processing of each section of the electronic camera; and sub-control means for executing initialization processing of a motor for driving the retractable lens. When the initialization processing of the motor is being executed by the sub-control means, the main control means is kept in a standby state or a power-off state, and after the initialization processing by the sub-control means is completed, the sub-control is performed. An electronic camera, wherein the means cancels a standby state or a power-off state of the main control means.