JP2006270862A - Imaging apparatus provided with shutter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus provided with a shutter device which effectively prevents blooming or the like that results from applying more light than necessity to an imaging element. <P>SOLUTION: The imaging apparatus 1 is provided with the imaging element 10 having an electronic shutter function, the shutter device 24 having a driving mechanism for a shutter blade, state-detecting portions (12, 13, 14 and 15) to detect the state of the shutter device 24, and a control portion 30 for adjusting the exposure control timing of the electronic shutter according to the result detected by the state-detecting portions (12, 13, 14 and 15). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an imaging device including a shutter device.

2. Description of the Related Art Conventionally, there is a camera that performs exposure control by using a shutter device having a shutter blade driving mechanism, a so-called mechanical shutter, and an electronic shutter function of an image sensor. (For example, Patent Document 1)
JP-A-11-234573

  In the above exposure control, the mechanical shutter drive part that is open-loop control, considering the temperature condition, attitude difference, aging due to endurance, difference in power supply type, voltage, etc., even under the worst condition The operation is performed at a timing at which it is guaranteed that no defect occurs in the exposure timing. Such a mechanical shutter drive has an opening longer than the time necessary for exposure, and therefore, there is a problem that extra light is incident on the image sensor and blooming occurs.

Also in the above-mentioned Patent Document 1, the excessive opening of the mechanical shutter is not considered, and the occurrence of shooting blooming or the like cannot be effectively suppressed.
An object of the present invention is to provide an imaging device including a shutter device that can effectively prevent blooming and the like.

  An imaging device to which the present invention is applied includes an imaging device having an electronic shutter function, a shutter device having a shutter blade driving mechanism, a state detection unit that detects a state of the shutter device, and a detection result by the state detection unit And a control unit for adjusting the exposure control timing of the electronic shutter according to the above.

  The imaging apparatus according to the present invention can effectively prevent blooming and the like.

Embodiments in which the present invention is applied to a digital camera will be described below with reference to the accompanying drawings.
A block diagram of the digital camera 1 is shown in FIG. Image sensor 10, image sensor drive unit 11, image processing unit 12, temperature sensor 13, attitude sensor 14, power supply control unit 15, EEPROM 16, ROM 17, RAM 18, storage medium 19, display unit 20, release button 21, operation unit 22, The shutter control unit 23 is connected to and controlled by the control unit 30. The shutter 24 has shutter blades and drives and controls the shutter blades based on a control signal from the shutter control unit 23.

  The imaging element 10 is a solid-state imaging element having a rectangular light receiving element such as a CCD or a CMOS that photoelectrically converts and accumulates imaged subject light and outputs it as a subject image signal. The image sensor control unit 11 controls the exposure accumulation time of the image sensor 10 and outputs the accumulated charge as a subject image signal. The image processing unit 12 performs various processes on the image signal output from the image sensor 10 to create image data. The created image data is stored in the RAM 18 or the storage medium 19. The temperature sensor 13 is a temperature sensor for detecting and outputting the temperature inside or around the shutter 24.

The attitude sensor 14 detects the attitude of the digital camera 1 such as the normal position or the vertical position.
The power supply control unit 15 controls the voltage supplied from a power supply (not shown), and the type of power supply (AC adapter, battery), and the type and supplied voltage when the power supply is a battery, remaining capacity, etc. Is detected.

  The EEPROM 16 is an electrically rewritable ROM that can retain data even when the power of the digital camera 1 is turned off, and stores setting values and the like of the digital camera 1. In the present embodiment, the EEPROM 16 also stores the number of times a shutter 24 to be described later is driven. A flash memory or the like may be used instead of the EEPROM 16. The ROM 17 stores data such as programs and initial values necessary for the operation of the digital camera. The RAM 18 is used for storing primary data when the control unit 30, the image processing unit 12, and the like perform processing. The storage medium 19 is a detachable memory card that stores image data and the like created by the image processing unit 12.

The display unit 20 includes a liquid crystal display member, a display driver, and the like, and shows image data and the like stored in the RAM 18 under the control of the control unit 30.
The release button 21 is a well-known composite switch in which the first switch is turned on by a half-press operation and the second switch is turned on by a full-press operation. The operation unit 22 includes operation members for operating the digital camera 1 such as a power button, a cross key, a mode dial, and a command dial (not shown).

  The shutter control unit 23 performs drive control of the shutter blades of the shutter 24 disposed in front of the image sensor. In the present embodiment, the shutter 24 is a focal plane shutter including a pair of shutter blades for shielding a subject light flux to the image sensor 10.

  The digital camera 1 in the present embodiment uses a so-called electronic shutter mechanism that controls the charge accumulation time (shutter seconds) of the image sensor 10 with a control signal from the image sensor drive unit 11. That is, the light shielding by the shutter 24 is mainly intended to shield the image sensor 10 after the exposure is completed.

<Shutter>
FIG. 2A shows a front view of the shutter 24 in the closed state, and FIG. 2B shows a front view of the shutter 24 in the open state. As shown in the figure, the shutter 24 is provided with a rectangular opening 24a and a set of shutter blades 24b that close the opening 24a. The opening 24a is installed in the digital camera 1 so that the short side direction and the long side direction thereof are parallel to the short side direction and the long side direction of the light receiving unit of the image sensor 10, respectively. The opening / closing of the shutter blade 24b is electrically controlled and driven. The shutter 24 is opened by driving the shutter blade 24b in the direction of arrow A (a direction against gravity) under the control of the shutter control unit 23 and retracting. When the shutter 24 in the open state receives a close signal from the shutter control unit 23, the shutter 24 drives the retracted shutter blade 24b in the direction of arrow B (direction according to gravity) to shield the opening 24a.

<Time lag when driving the shutter>
There is a normal time lag between the control signal from the shutter control unit 23 and the operation of the shutter blades 24b of the shutter 24 driven by receiving the control signal. The sequence of the opening / closing driving operation of the shutter blade 24b that receives the opening / closing driving signal and the opening / closing driving signal of the shutter control unit will be described with reference to FIG.

  The open / close signal (a) shown in FIG. 3 is a shutter open / close drive signal sent from the shutter control unit 23 to the shutter 24. An L signal is sent to the shutter 24 from the shutter control unit 23 when the shutter is opened and an H signal is sent when the shutter is closed. The aperture ratio (b) indicates the aperture ratio of the aperture 24a of the shutter 24.

  After the shutter opening signal (L signal) is output at time To = 0, the opening 24a starts to be opened by the shutter blade 24b after the predicted opening start time lag to 1 second. Further, the shutter opening 24a is fully opened after the predicted opening travel time to 2 seconds. Next, when a shutter closing signal is output at time Tc, the opening 24a starts to be closed by the shutter blade 24b after 1 second of the predicted closing start time lag tc, and the shutter opening 24a is closed by the shutter blade 24b after 2 seconds of the predicted closing traveling time tc. It is done.

Note that the time lags to1 and tc1 are time lags caused by electrical factors such as the delay of the electrical signal and mechanical features such as switch drive and shutter blade mechanism.
The time lags to1 and tc1 and the shutter travel times to2 and tc2 described above vary depending on the direction of gravity applied to the shutter 24, the number of times the shutter 24 is accumulated by the shutter drive, the temperature of the shutter 24, the power supply state supplied to the shutter drive, and the like. .

  Specifically, the time lag and the shutter travel time become longer due to aging or wear of the driving unit and the switch unit of the shutter 24 by driving the shutter blade 24b. In addition, even when the temperature state of the shutter 24 is not within the assumed temperature range (for example, 10 to 40 ° C.), the time lag and the shutter travel time become long. Further, when the voltage supplied to the shutter 24 and the shutter control unit 23 decreases, the operation of the drive unit, the switch unit, and the like becomes delayed, and the time lag and the shutter travel time become longer.

  Regarding the gravitational direction applied to the shutter 24, the closed travel direction of the shutter blade 24b, that is, the state where the arrow B direction is substantially parallel to the gravity direction and the direction substantially coincides with the normal position of the digital camera 1, and the arrow B direction is substantially parallel to the gravity direction. A state in which the direction is almost opposite is a reverse position of the digital camera 1, and a state in which the arrow B direction is substantially perpendicular to the direction of gravity is a lateral position of the digital camera 1. Hereinafter, the shutter closing travel time when the digital camera 1 is in the normal position is considered as a reference. The shutter opening travel time at the normal position is longer than the reference time. When the digital camera 1 is in the reverse position, the shutter open travel time is the same as the reference time, and the closed travel time is longer than the reference time. When the digital camera 1 is in the horizontal position, both the shutter open travel time and the shutter open travel time are longer than the reference time.

  A change in the aperture ratio of the shutter 24 when the time lags to1 and tc1 and the shutter blade travel times to2 and tc2 are the longest is shown in the dotted line portion of the aperture ratio (b) shown in FIG.

  Here, a conventional electronic shutter sequence for the shutter drive sequence will be described. In FIG. 3, the conventional exposure timing by the electronic shutter of the image sensor 10 is shown as CCD exposure (c), and the readout timing of the subject image signal that has been stored by exposure is shown as CCD readout (d).

  Conventionally, as shown as CCD exposure (c), an exposure by an electronic shutter is performed at a time Te = Tc + tc1−td, which is a margin td seconds before, based on the timing Tc + tc1 at which the opening 24a of the shutter 24 is closed earliest. Exposure is started at time Ts = Tc + tc1−td−ts so that ts ends (where ts is the accumulation time). Further, assuming the time Tce = Tc + tc1 + tc2 + tc3 when the opening 24a of the shutter 24 is closed latest, the transfer charge transfer start time Tr = Tce + tr of the image sensor 10 is determined. However, in the above description, it is good if the time lag tc1 and the predicted closed travel time tc2 are the shortest. However, if the time lag and the predicted closed travel time become longer due to the state of the shutter 24 as described above, an extra exposure is performed for tc 3 seconds. The subject light flux strikes the image sensor 10 after the completion. Further, since the transfer charge start time Tr of the image sensor 10 is determined on the assumption that the time Tce when the opening of the shutter 24 is closed is the longest, the exposure sequence may become unnecessarily long.

  The digital camera 1 in the first embodiment to which the present invention is applied detects the state of the shutter 24, determines the time lag and the shutter blade travel time according to the detected state of the shutter 24, and based on this, The time Tc + tc1 before the opening 24a of the shutter 24 starts to close is td seconds before, that is, the time Te = Tc + tc1-td is set as the exposure end time at which the exposure by the electronic shutter ends, and the electronic shutter is used in accordance with the exposure end time. The exposure start time Ts = Te−ts is determined.

  Therefore, the digital camera 1 according to the embodiment to which the present invention is applied has the shortest driving delay of the shutter 24 for the posture of the digital camera 1, the temperature of the shutter 24, the number of times the shutter 24 is released, and the power state of the digital camera 1. Between the normal state and the non-standard state that increases the drive delay of the shutter 24. There are cases where all the states are in the standard state and those that are not in the standard state (the drive delay of the shutter 24 increases). The exposure end time Te, which is the reference for the exposure start time Ts of the electronic shutter in the image sensor 10, is changed. The standard state of each factor is as follows.

<Standard posture of digital camera 1>
A state in which the shutter blades are in the normal position where the closed travel time is short is defined as a standard state. When the digital camera 1 is in the horizontal position and the reverse position, the shutter blade closed travel time is predicted to be longer than when the digital camera 1 is in the normal position. The posture of the camera is detected by the posture sensor 14.

<Shutter temperature>
Regarding the temperature of the shutter, the standard state is when the shutter 24 is in the range of 10 ° C to 40 ° C. When the shutter 24 is at a temperature other than the standard temperature, the time lag and the shutter blade closing travel time are predicted to be longer, and therefore, the non-standard state is set. The temperature of the shutter 24 is detected by the temperature sensor 13. As the temperature sensor, a shutter 24 or a temperature sensor arranged outside the periphery of the shutter 24 may be used. For example, in order to know the temperature of the shutter 24 or the peripheral portion of the shutter 24, the shutter or the image sensor 10 based on the values output from the temperature sensors that measure the temperature of the display unit 20, the image sensor 10, the power supply unit (not shown), the electronic substrate, etc. The temperature around the shutter may be calculated.

<Release count>
With regard to the number of times of release, the case where the number of times of release is 5000 times or less is set as a standard state. If the number of releases exceeds 5000, it is predicted that the closing start time lag and the closing time will become longer due to fatigue of the shutter 24, and therefore the non-standard state is set. The number of times of release is stored in the EEPROM 16 every time imaging processing is performed. The number of releases stored in the EEPROM 16 is reset when the shutter 24 is replaced.

<Power status>
A case where the power source of the digital camera 1 is equal to or higher than a predetermined value is set as a standard state. When the power supply voltage is lowered, the driving voltage of the shutter 24 is lowered, so that the closing start time lag and the closing running time are predicted to be longer, so the non-standard state is set. The power supply voltage is detected by the power supply control unit. In addition, when the power source is an AC adapter, or when the power source is a secondary battery and the voltage of the secondary battery is higher than a predetermined value, or the remaining capacity of the secondary battery is higher than a predetermined value, the standard state may be used. .

  Note that although the posture of the digital camera 1, the temperature of the shutter 24, the number of times the shutter 24 is released, and the power state of the digital camera 1 are used as factors that delay the driving of the shutter 24, the present invention is not limited to this. For example, an acceleration sensor or the like is provided in the digital camera 1 to detect the acceleration, vibration state, etc. of the digital camera 1, and the case where this does not increase the delay in driving the shutter 24 is set as the standard state.

<Exposure control sequence in standard condition>
The exposure control sequence when each state of the shutter 24 is in the standard state will be described with reference to FIG. It is predicted that the time lag from the shutter closing signal until the shutter blades 24b actually start to close and the shutter blade closing travel time will be the shortest.

  First, when the imaging process is started, the shutter control unit 23 outputs a shutter close signal to the shutter 24 at the time of To (To = 0) according to a command from the control unit 30. Then, the opening 24a starts to be opened by the shutter blade 24b of the shutter 24 after the time lag to 1 second, and the opening 24a is fully opened after the shutter blade opening travel time to 2 seconds. Next, after a predetermined time has elapsed, at time Tc, the shutter control unit 23 outputs a shutter close signal to the shutter 24. Then, the opening 24a starts to be closed by the shutter blade 24b of the shutter 24 after the predicted closing start time lag tc 1 second, and the opening 24a is fully closed after the shutter blade closing traveling time tc 2 seconds.

  Here, the image sensor control unit 11 performs exposure with an arbitrary exposure time (ts seconds) from the time Tc + tc1 at which the shutter 24 starts to close to the exposure end time Te = Tc + tc1-td with a margin of time td seconds. Charge accumulation by the image sensor 10 is started at an exposure start time Ts (Ts = Te−ts) determined so as to end.

  Next, the charge accumulated in the image sensor 10 is read from the read start time Tr = Tce + tr after a margin of tr seconds from the time Tce = Tc + tc1 + tc2 when the opening 24a of the shutter 24 is completely shielded. Output as a subject image signal. The output subject image signal is temporarily stored in the RAM 18.

<Exposure control sequence when shutter is not standard>
An exposure control sequence when one of the states of the shutter 24 described above is not the standard state will be described with reference to FIG. It is predicted that the time lag from the shutter closing signal until the opening 24a actually starts to be closed by the shutter blade 24b and the shutter blade closing travel time will be longer.

In the aperture ratio (b), CCD exposure (c), and CCD readout (d), the case where each state of the shutter 24 is not the standard state is indicated by a solid line, and the standard case is indicated by a dotted line.
First, when the imaging process is started, the shutter control unit 23 outputs a shutter close signal to the shutter 24 at the time of To (To = 0) according to a command from the control unit 30. Then, the opening 24a starts to be opened by the shutter blade 24b of the shutter 24 after the predicted opening start time lag to10 seconds, and the opening 24a is fully opened after the shutter blade opening running time to 20 seconds. Next, after a predetermined time has elapsed, at time Tc, the shutter control unit 23 outputs a shutter close signal to the shutter 24. Then, it is predicted that the opening 24a starts to be closed by the shutter blade 24b of the shutter 24 after the predicted closing start time lag tc 10 seconds, and the opening 24a is fully closed after the shutter blade closing travel time tc 20 seconds. Note that tc10> tc1 and tc20> tc2.

  Here, the image sensor control unit 11 performs exposure with an arbitrary exposure time (ts seconds) from the time Tc + tc10 at which the shutter 24 starts to close to the exposure end time Te = Tc + tc10−td with a margin of time td seconds. The exposure by the image sensor 10 is started at the exposure start time Ts (Ts = Te−ts) determined so as to end.

  The charge accumulated in the image sensor 10 is read out from the readout start time Tr = Tce + tr after a margin of tr seconds from the time Tce = Tc + tc10 + tc20 when the opening 24a of the shutter 24 is completely shielded, and the subject image Output as a signal. The output subject image signal is temporarily stored in the RAM 18.

<Flow of digital camera 1>
The digital camera 1 according to the present embodiment includes a shooting mode for performing an imaging operation and processing of a captured image according to an imaging processing condition set by a user, and a menu mode for setting various functions while viewing a menu screen displayed on the display unit 20. The display unit 20 has an operation mode such as an image display mode for displaying recorded image data and the like. The menu mode and the image display mode are well-known processes and will not be described. Each mode is switched by the user operating a mode dial (not shown) or the like.

Hereinafter, imaging processing in the imaging mode to which the present invention is applied will be described with reference to the flowchart of FIG.
When the release button 21 is pressed halfway while the digital camera 1 is in the shooting mode, the imaging process is started. In step S101, imaging preparation processing for imaging is performed. The imaging preparation process is a process for determining a shutter speed (exposure time ts) and an aperture value to be used when imaging based on a subject luminance value measured by a photometric unit (not shown), or obtained by a distance measuring unit. This is a process such as a focusing process for focusing on a subject from data. The determined exposure time ts is stored in the RAM 18. When the imaging preparation process ends, the process proceeds to a shutter state detection subroutine for detecting the shutter state in step S102.

The flow of the shutter state detection process will be described with reference to the flowchart of FIG.
When the shutter state detection subroutine is entered, first, 0 is input to each of variables A, B, C, and D in step S201. Next, in step S202, the temperature sensor 13 detects the temperature of the shutter 24, and it is determined whether or not the temperature is 10 to 40 ° C. When the temperature of the shutter 24 is not 10 to 40 ° C., the process proceeds to step S203, and when the temperature of the shutter 24 is 10 to 40 ° C., the process proceeds to step S204. In step S203, after substituting 1 for the variable A, the process proceeds to step S204.

  In step S204, the posture of the digital camera 1 is detected by the posture sensor 14, and it is determined whether or not the posture is the normal position. If the posture of the digital camera 1 is not the normal position, the process proceeds to step S205. If the posture of the digital camera 1 is the normal position, the process proceeds to step S206. In step S205, 1 is substituted into variable B, and then the process proceeds to step S206.

  In step S206, it is determined whether or not the number of releases already stored in the EEPROM 16 is 5000 or less. If the number of releases stored in the EEPROM 16 is not less than 5000, the process proceeds to step S207. If the number of releases stored in the EEPROM 16 is less than 5000, the process proceeds to step S208. In step S207, 1 is substituted into variable C, and then the process proceeds to step S208.

  In step S208, the power supply control unit 15 detects a power supply voltage and determines whether the power supply voltage is equal to or higher than a predetermined value. If the power supply voltage is not equal to or higher than the predetermined value, the process proceeds to step S209. If the power supply voltage is equal to or higher than the predetermined value, the process proceeds to step S210. In step S209, after substituting 1 for the variable D, the process proceeds to step S210.

In step S210, it is determined whether A + B + C + D> 0. If A + B + C + D> 0 is not satisfied, the process proceeds to step S211. If A + B + C + D> 0 is satisfied, the process proceeds to step S212.
In step S211, the estimated closing start time lag is set to tc1, and the predicted closed running time is set to tc2, and stored in the RAM 18.

In step S212, the estimated closing start time lag is set to tc10, and the predicted closed running time is set to tc20, which are stored in the RAM 18.
When step S211 or S212 ends, the shutter state detection subroutine ends, and the process proceeds to step S103 of the imaging process flow again.

  In step S103, it is determined whether or not the release button 21 has been fully pressed. If the release button 21 has been fully pressed, the process proceeds to step S104. If the release button 21 has not been fully pressed, the imaging process ends. In step S104, an imaging process is performed based on the exposure control sequence described above. The exposure by the electronic shutter in the exposure control sequence is performed by reading the exposure time ts of the electronic shutter of the image sensor 10 and the predicted closing start time lag (tc1 or tc10) from the RAM 18, and using the electronic shutter obtained based on these. Exposure is started at the start time Ts (Ts = Tc + tc1-td-ts or Ts = Tc + tc10-td-ts). The CCD readout of the exposure control sequence is the subject signal readout start time Tr calculated from the predicted closing start time lag and the predicted closing time (Tr = Tc + tc1 + tc2 + tr or Tr = Tc + tc10 + tc20 + tr). Is started. The subject image signal read from the image sensor 10 is subjected to various processes by the image processing unit 12 to create subject image data. In step S105, the subject image data created in step S104 is stored in the storage medium 19, and then the imaging process is terminated.

  In the above description, the shutter state detection process for detecting the state of the shutter 23 is performed in step S102. However, the present invention is not limited to this. For example, the shutter state detection process may be performed when the digital camera 1 is turned on or switched to the imaging process mode.

  Further, the shutter 24 is provided with a shutter closing switch and a shutter opening switch for detecting whether the opening 24a is fully opened or not, and the exposure control sequence processing timing (using the shutter opening switch and the shutter closing switch) is provided. For example, the shutter closing signal output timing or the like may be adjusted. In this case, the electronic shutter exposure timing (Ts, Te) by the image sensor 10 is determined in consideration of the time lag due to the deterioration of the shutter open switch, the shutter close switch, the drop of the supply power supply voltage, and the like.

  As described above, in the digital camera 1 according to the present embodiment, the estimated closing start time lag from when the shutter 24 receives the shutter blade closing signal until the opening 24a of the shutter 24 actually starts to close is detected as the state of the detected shutter. (Tc1 or tc10) is determined based on whether or not the image sensor is in the standard state, and based on this, the exposure timing (Ts, Te) of the electronic shutter of the image sensor 10 is determined. Can be reduced in the incident time of the image sensor 10. As a result, it is possible to reduce blooming or the like caused by subject light incident unnecessarily on the image sensor after exposure.

  Also, the readout start time Tr of the charge signal accumulated in the image sensor 10 is calculated by using the predicted closing start time lag (standard state time tc1, non-standard state time tc10) and predicted closing time (standard state time tc2, non-standard state time). tc20) (standard state Tr = tc1 + tc2 + tr, non-standard state Tr = tc10 + tc20 + tr), so that the exposure control sequence can be shortened (that is, FIG. It can be shortened by tc 3 seconds in b). Therefore, the frame speed during continuous shooting can be improved.

As described above, the digital camera 1 according to an embodiment to which the present invention is applied has been described. However, the present invention is not limited to this. Hereinafter, modifications will be described.
<Modification>
In the above description, the exposure timing of the image sensor 10 is determined using two predicted closing start time lags (tc1, tc10) separately for two cases of the shutter state being a standard state or a non-standard state. Instead, the shutter state may be classified into two or more states, and the exposure timing of the image sensor 10 may be determined using a predicted closing start time lag according to each state. For example, every time the shutter temperature deviates from the standard temperature (10 to 40 ° C.) by 5 ° C., the time lag increases the estimated closing start time lag by 1 ms, and the amount of increase in the predicted closing start time lag due to temperature is obtained. Similarly, for the posture, number of releases, and power supply voltage, the amount of increase in delay of the predicted closing start time lag is obtained, and the amount of increase in delay of these predicted closing start time lags is integrated to calculate the amount of increase in delay of the predicted closing start time lag. The expected closing start time lag is obtained. In the exposure control sequence, the exposure start / end time by the electronic shutter of the image sensor is determined using the calculated predicted closing start time lag. By determining the predicted closing start time lag more finely as described above, the subject light incident on the image sensor after exposure can be further reduced.

  In addition, although it demonstrated using 1 set of focal plane shutters, you may use 2 sets of shutters which consist of a well-known front curtain rear curtain. In this case, the above-described closing start time lag is the trailing start time lag. Furthermore, the present invention may be applied to a digital camera using a lens shutter. The present invention may be applied to a single-lens reflex digital camera, a lens-integrated digital camera, a digital video camera, or the like.

Block diagram of digital camera 1 Front view of shutter 24 Conventional exposure control sequence Standard exposure control sequence Exposure control sequence when not in standard condition Flow chart of imaging process Shutter state detection process flow chart

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital camera 10 Image sensor 11 Image sensor control part 12 Image processing part 13 Temperature sensor 14 Attitude sensor 15 Power supply control part 16 EEPROM
17 ROM
18 RAM
19 Storage medium 20 Display unit 21 Release button 22 Operation unit 23 Shutter control unit 24 Shutter

Claims (2)

An image sensor with an electronic shutter function;
A shutter device having a shutter blade drive mechanism;
A state detector for detecting the state of the shutter device;
An image pickup apparatus comprising: a control unit that adjusts an exposure control timing of the electronic shutter according to a detection result by the state detection unit.   2. The imaging device according to claim 1, wherein the state detection unit detects the number of times of cumulative driving of the shutter device, and the control unit determines an exposure control timing of the electronic shutter based on the number of cumulative times of driving of the shutter device. An imaging device characterized by adjusting.

Images