JP2018081123A - LIGHTING DEVICE, ITS CONTROL METHOD, AND IMAGING SYSTEM - Google Patents

Abstract

An operation of an illuminating device having an auto bounce function in a state of being detached from an imaging device is appropriately controlled. A strobe device 300 includes a main body portion 300a that can be attached to and detached from a camera main body 100, and a movable portion 300b that has a light emitting portion and is rotatably held in a predetermined direction with respect to the main body portion 300a. The strobe device 300 includes a strobe IF circuit 380 that communicates with the camera body 100 via the contact 130, and a bounce circuit 340 that drives the movable unit 300 b in accordance with an instruction for bounce flash photography and changes the direction of light emitted from the light emitting unit. The FPU 310 that controls this operation detects whether or not the camera body 100 is communicably connected, and prohibits the driving of the movable portion 300b when the camera body 100 is not communicably connected. [Selection] Figure 1

Description

  The present invention relates to a lighting device, a control method therefor, and an imaging system, and more particularly to a technique for controlling the operation of a lighting device whose irradiation direction can be automatically changed.

  An imaging technique (hereinafter referred to as “bounce flash photography”) is known in which light emitted from an illumination device is irradiated toward a ceiling or the like, and a subject is irradiated with diffuse reflected light from the ceiling or the like. According to the bounce flash photography, the light of the illumination device can be indirectly irradiated onto the subject, so that it is possible to depict with soft light.

  In an imaging system that automatically performs bounce flash photography, the subject position and ceiling position are detected by the main body of the imaging device or the control unit of the lighting device, and an appropriate bounce angle is calculated based on the detection result. The light irradiation direction is automatically changed. For example, Patent Literature 1 discloses an imaging system that changes a range in which the posture and angle of a light emitting unit of an illumination device can be adjusted depending on whether the illumination device is attached to the main body of the imaging device or removed from the imaging device. Has been proposed.

JP 2014-38267 A

  However, in the technique described in Patent Document 1, an operation member (button, switch, etc.) for bounce activation provided in the illumination device even when the illumination device is detached from the main body of the imaging device. When is operated, auto bounce operation is performed. Therefore, for example, even if the lighting device is not in cooperation with the main body of the imaging device stored in a bag or the like, if the operation member is operated unintentionally, it is meaningless auto There is a problem that the bounce operation is performed.

  An object of this invention is to provide the technique which controls appropriately the operation | movement in the state removed from the imaging device of the illuminating device which has an auto bounce function.

  An illumination device according to the present invention includes a main body that is attachable to and detachable from an imaging device, a light emitting unit, a movable unit that is rotatably held in a predetermined direction with respect to the main body, and a communication with the imaging device. Detecting whether or not the communication means is connected to the imaging device, the communication means for performing the bounce flash photography, the drive means for driving the movable portion to change the direction of light emission from the light emission portion, and the imaging device And a control unit that prohibits driving of the movable part by the driving unit when the detecting unit detects that it is not communicably connected to the imaging apparatus.

  ADVANTAGE OF THE INVENTION According to this invention, the operation | movement in the state removed from the imaging device of the illuminating device which has an auto bounce function can be controlled appropriately.

1 is a block diagram illustrating a schematic configuration of an imaging system according to an embodiment of the present invention. It is sectional drawing which shows schematic structure of the imaging system shown in FIG. It is a block diagram of a communication circuit between a camera body and a strobe device. It is a block diagram of an example of the determination signal output circuit which a strobe IF circuit has. It is a figure explaining the communication method between a camera main body and a strobe device. It is a list of commands used for communication between the camera body and the flash device. It is a flowchart of the process by the camera body side in auto bounce flash photography. It is a flowchart following the flowchart of FIG. It is a flowchart explaining an example of a bounce process. It is a flowchart explaining a connection determination process. It is a timing chart explaining a connection determination process. It is a figure which shows the rotation state of the movable part of a strobe device. It is explanatory drawing of the sensor which detects the rotation angle of the movable part of a strobe device. It is a figure which shows the relationship between the rotation angle of the movable part of a strobe device, and a sensor output. It is a flowchart of an auto bounce operation. It is a flowchart of an example of the bounce drive control of a strobe device. It is a flowchart explaining another example of a bounce process. It is a flowchart explaining a connection determination process. It is a flowchart of another example of the bounce drive control of a strobe device. It is a flowchart explaining another example of a bounce process.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram illustrating a schematic configuration of an imaging system 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a schematic configuration of the imaging system 10. In FIG. 1 and FIG. 2, the same elements are denoted by the same reference numerals. Also, some elements are shown in FIG. 1 but not shown in FIG. 2, and some other elements are shown in FIG. 2 but not shown in FIG.

  The imaging system 10 includes a camera body 100 that is an imaging device, a lens barrel 200 that is attached to the camera body 100, and a strobe device 300 that is an illumination device attached to the camera body 100. The strobe device 300 is detachable from the camera body 100, and the lens barrel 200 may be fixed (integrated) to the camera body 100, or may be detachable from the camera body 100.

  The camera body 100 includes a camera microcomputer 101, an image sensor 102, a shutter 103, a main mirror 104, a focus plate 105, a photometric circuit 106, a focus detection circuit 107, a gain switching circuit 108, an A / D converter 109, and a timing generator 110. . The camera body 100 includes a signal processing circuit 111, an input unit 112, a display unit 113, a pentaprism 114, and a sub mirror 115. The camera body 100 further includes a wireless unit 116, a communication line LC, a communication line SC, a terminal 120, a terminal 130, an attitude detection circuit 140, and a camera interface circuit 150. In the following description, the camera microcomputer 101 is described as “CCPU101”, the timing generator 110 is described as “TG110”, and the camera interface circuit 150 is described as “camera IF circuit 150”.

  The CCPU 101 is a microcomputer that controls the operation of each unit of the camera body 100 by executing various software (program codes). The CCPU 101 includes a one-chip IC circuit configuration with a built-in microcomputer including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, and the like. It has become. The CCPU 101 performs various determination processes and arithmetic processes for controlling the camera body 100 by developing predetermined program codes stored in the ROM in the RAM.

  The image sensor 102 is an image sensor such as a CCD sensor or a CMOS sensor including an infrared cut filter, a low-pass filter, and the like. The light flux from the subject that has passed through the lens barrel 200 forms an optical image of the subject on the image sensor 102. The shutter 103 is configured to be able to transition between a state where the image sensor 102 is shielded from light and a state where the image sensor 102 is exposed. The main mirror 104 is a half mirror, and is retracted from a position where a part of light incident through the lens barrel 200 is reflected to form an image on the focus plate 105 and a photographing optical path from the lens barrel 200 to the image sensor 102. It is possible to move between positions. An optical image of the subject is formed on the focus plate 105. The user (photographer) can confirm the optical image of the subject formed on the focus plate 105 via an optical finder (not shown).

  The photometry circuit 106 (AE circuit) includes a photometry sensor in the circuit, and outputs exposure information by performing photometry in one or a plurality of areas set for the subject. Note that the photometry sensor in the photometry circuit 106 expects a subject image formed on the focusing screen 105 via the pentaprism 114. The focus detection circuit 107 (AF circuit) includes a distance measuring sensor having a plurality of distance measuring points in the circuit, and outputs focus information such as a defocus amount of each distance measuring point. The gain switching circuit 108 amplifies the analog signal output from the image sensor 102. The CCPU 101 switches the gain to be applied to the signal in the gain switching circuit 108 in accordance with the shooting condition, user operation, and the like. The A / D converter 109 converts the analog signal output from the gain switching circuit 108 into a digital signal, thereby generating image data. The TG 110 synchronizes the signal output timing from the image sensor 102 (the input timing of the amplified signal from the gain switching circuit 108 to the A / D converter 109) and the A / D conversion timing in the A / D converter 109.

  The signal processing circuit 111 performs predetermined signal processing on image data composed of digital signals output from the A / D converter 109. The input unit 112 includes operation units such as a power switch, a release button, and a setting button. The CCPU 101 executes various processes based on instructions from the input unit 112 according to operations on the input unit 112. For example, when the release button is operated in one step (half-pressed), the release switch SW1 is turned on, and the CCPU 101 executes shooting preparation operations such as AF (autofocus) and AE (automatic exposure). When the release button is operated in two steps (fully pressed), the release switch SW2 is turned on, and the CCPU 101 executes a series of shooting operations from exposure to the image sensor 102 to storage of the generated image data. Various settings of the strobe device 300 can be performed by operating the setting buttons. When wireless communication is possible between the flash device 300 and the camera body 100, even if the flash device 300 is not directly mounted on the camera body 100, it is the same as the mounted state by operating the setting button. In addition, various settings of the strobe device 300 can be performed.

  The display unit 113 includes a liquid crystal device and a light emitting element, and displays a shooting mode set for the camera body 100 and other shooting information. The liquid crystal device displays a subject image and a shot image being shot. Playback display and the like are also possible. The pentaprism 114 guides the subject image on the focusing screen 105 to a photometric sensor in the photometric circuit 106 and an optical viewfinder (not shown). The sub mirror 115 guides the light incident from the lens group 202 and transmitted through the main mirror 104 to the distance measuring sensor of the focus detection circuit 107. The wireless unit 116 performs wireless communication with a later-described wireless unit 370 included in the strobe device 300 using a known technique.

  The communication line LC is an interface signal line that connects a camera microcomputer 100 and a lens microcomputer 201 (hereinafter referred to as “LPU 201”) provided in the lens barrel 200 to be communicable. The imaging system 10 includes a terminal 120 for performing three-terminal serial communication as an example of communication using the communication line LC, and performs information communication such as data exchange and command transmission using the CCPU 101 as a host. The terminal 120 includes an SCLK_L terminal, a MOSI_L terminal, a MISO_L terminal, and a GND terminal. The SCLK_L terminal is a terminal for synchronizing communication between the camera body 100 and the lens barrel 200. The MOSI_L terminal is a terminal for transmitting data from the camera body 100 to the lens barrel 200. The MISO_L terminal is a terminal for the camera body 100 to receive data transmitted from the lens barrel 200. The GND terminal connects the camera body 100 and the lens barrel 200 and drops them to the ground potential.

  The communication line SC is a signal line of a camera IF circuit 150 which is an interface on the camera body 100 side for communicably connecting a CCPU 101 and a strobe microcomputer 310 (hereinafter referred to as “FPU 310”) provided in the strobe device 300 so as to communicate with each other. . The imaging system 10 includes a terminal 130 for performing three-terminal serial communication as an example of wired communication using the communication line SC. Specifically, the terminal 130 is configured by an accessory shoe and a hot shoe that mechanically connect the camera body 100 and the strobe device 300 and that are communicably connected. Therefore, not only the strobe device 300 but also other camera accessories can be attached to and detached from the terminal 130 on the camera body 100 side. The CCPU 101 and the FPU 310 are communicably connected via a camera IF circuit 150, a terminal 130, and a strobe interface circuit 380 (hereinafter referred to as a “strobe IF circuit 380”) provided in the strobe device 300. Will be described later.

  The posture detection circuit 140 is a circuit that detects a posture difference of the camera body 100, and includes a posture H detection unit 140a that detects a posture difference in the horizontal direction, a posture V detection unit 140b that detects a posture difference in the vertical direction, and a front-rear direction ( A posture Z detection unit 140c that detects a posture difference in the Z direction) is included. For the posture detection circuit 140, for example, an angular velocity sensor or a gyro sensor is used. Posture information regarding the posture difference in each direction detected by the posture detection circuit 140 is supplied to the CCPU 101.

  The lens barrel 200 includes an LPU 201, a lens group 202, a lens driving unit 203, an encoder 204, an aperture 205, and an aperture control circuit 206. The LPU 201 is a microcomputer that controls each part of the lens barrel 200. The LPU 201 includes, for example, a one-chip IC circuit configuration with a built-in microcomputer including a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, and the like. It has become.

  The lens group 202 includes a plurality of lenses including a focus lens and a zoom lens. The lens group 202 may not include a zoom lens. The lens driving unit 203 drives the lenses included in the lens group 202 in the optical axis direction. The driving amount of the lens group 202 is calculated by the CCPU 101 based on the output of the focus detection circuit 107 provided in the camera body 100, and the calculated driving amount is transmitted from the CCPU 101 to the LPU 201. The encoder 204 detects the position of the lens group 202 and outputs drive information to the LPU 201. The LPU 201 (or CCPU 101) calculates a driving amount based on the driving information from the encoder 204, and the lens driving unit 203 drives the lens group 202 by the calculated driving amount, thereby performing focus adjustment. The diaphragm 205 adjusts the amount of light passing through the lens barrel 200. A diaphragm control circuit 206 drives the diaphragm 205 under the control of the LPU 201.

  The strobe device 300 generally includes a main body part 300a that can be attached to and detached from the camera main body 100, and a movable part 300b that is rotatably held in the vertical and horizontal directions with respect to the main body part 300a. Note that the vertical direction is a direction substantially parallel to the vertical direction when the camera body 100 is held in a normal posture. The left-right direction is a direction orthogonal to the vertical direction when the camera body 100 is held in a normal posture.

  The strobe device 300 includes a battery 301, a booster circuit block 302, a trigger circuit 303, a light emission control circuit 304, a discharge tube 305, a reflector 306, a strobe optical system 307, a distance measuring unit 308, an integration circuit 309, and an AND gate 311. The strobe device 300 includes an FPU 310, an input unit 312, a display unit 313, a photodiode 314, a comparator 315, an optical system driving circuit 330, a bounce circuit 340, an attitude detection circuit 360, a wireless unit 370, and a strobe IF circuit 380.

  The FPU 310 is a microcomputer that controls each part of the strobe device 300. The FPU 310 has a microcomputer built-in one-chip IC circuit configuration including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, and the like. ing. The battery 301 functions as a power source (VBAT) for the strobe device 300. The booster circuit block 302 includes a booster 302a, resistors 302b and 302c, and a main capacitor 302d. The booster 302a boosts the voltage of the battery 301 to several hundred volts, thereby charging the main capacitor 302d with electric energy for light emission. The charging voltage of the main capacitor 302d is divided by the resistors 302b and 302c, and the divided voltage is input to the A / D conversion terminal of the FPU 310. The trigger circuit 303 applies a pulse voltage for exciting the discharge tube 305 to the discharge tube 305. The light emission control circuit 304 controls the start and stop of light emission of the discharge tube 305. The discharge tube 305 is excited by receiving a pulse voltage of several KV applied from the trigger circuit 303, and emits light using the electric energy charged in the main capacitor 302d.

  The distance measuring unit 308 detects the distance to the object by a known method. The distance measuring unit 308 includes, for example, a light receiving sensor, and receives the light irradiated from the discharge tube 305 and reflected on the object in the irradiation direction by the light receiving sensor, and detects the distance to the object. Alternatively, the distance measuring unit 308 has a light source for distance measurement, and receives the light emitted from the light source for distance measurement and reflected on the object in the irradiation direction by the light receiving sensor, and detects the distance to the object. . The integration circuit 309 integrates the light reception current of the photodiode 314 and inputs the integration result to the inverting input terminal of the comparator 315 and the A / D converter terminal of the FPU 310. The non-inverting input terminal of the comparator 315 is connected to the D / A converter terminal in the FPU 310, and the output of the comparator 315 is connected to the input terminal of the AND gate 311. The other input terminal of the AND gate 311 is connected to the light emission control terminal of the FPU 310, and the output of the AND gate 311 is input to the light emission control circuit 304.

  The photodiode 314 is a sensor that receives light emitted from the discharge tube 305 directly or via a glass fiber or the like. The reflector 306 reflects the light emitted from the discharge tube 305 and guides it in a predetermined direction. The strobe optical system 307 includes an optical panel or the like, and is held so that the relative position with respect to the discharge tube 305 can be changed. By changing the relative position of the discharge tube 305 and the strobe optical system 307, the flash irradiation range from the light emitting unit can be changed within a predetermined range. The light emitting unit of the strobe device 300 mainly includes a discharge tube 305, a reflector 306, and a strobe optical system 307. The irradiation range of the flash light from the light emitting unit is changed by driving the strobe optical system 307 capable of zooming. In addition, the irradiation direction of the light emitting unit changes with the rotation of the movable unit 300b. Note that the method of changing the irradiation range of the light emitting unit is not limited to the method of changing the relative position of the discharge tube 305 and the strobe optical system 307. For example, the method of changing the shape of the reflector 306 or the strobe optical system 307 A method of changing optical characteristics may be used.

  The input unit 312 includes a power switch, a mode setting switch for setting the operation mode of the strobe device 300, an auto bounce switch for automatically executing bounce driving, a bounce angle storage switch for performing bounce driving, and buttons for setting various parameters Including an operation unit. The FPU 310 executes various processes based on instructions from the input unit 312 according to operations on the input unit 312. In the following description, the bounce flash photographing performed by automatically executing the bounce drive is referred to as auto bounce flash photographing.

  The display unit 313 includes a liquid crystal device and a light emitting element, and displays various setting information and operation states of the strobe device 300. The optical system drive circuit 330 includes a position detection unit 330a and an optical system drive unit 330b. The position detector 330a detects information related to the relative positions of the discharge tube 305 and the strobe optical system 307 by an encoder (not shown) or the like. The optical system driving unit 330b includes a motor or the like for driving the strobe optical system 307. The FPU 310 acquires the focal length information output from the LPU 201 via the CCPU 101, and calculates the drive amount of the strobe optical system 307 based on the acquired focal length information.

  The bounce circuit 340 detects the driving amount of the movable part 300b (the rotation angle of the movable part 300b with respect to the main body part 300a). The bounce circuit 340 includes a first bounce angle detection circuit 340a, a second bounce angle detection circuit 340c, a first bounce drive circuit 340b, and a second bounce drive circuit 340d. The first bounce angle detection circuit 340a (bounce H detection circuit) detects the drive amount of the movable unit 300b in the left-right direction. The second bounce angle detection circuit 340c (bounce V detection circuit) detects the driving amount of the movable unit 300b in the vertical direction. A rotary encoder or an absolute encoder is used to detect these drive amounts. The first bounce drive circuit 340b (bounce H drive circuit) rotates the movable portion 300b in the left-right direction. The second bounce drive circuit 340d (bounce V drive circuit) rotates the movable portion 300b in the vertical direction. A known motor or the like is used for these drives.

  The posture detection circuit 360 is a circuit that detects a posture difference of the strobe device 300, and includes a posture H detection unit 360a, a posture V detection unit 360b, and a posture Z detection unit 360c. The posture H detection unit 360a detects a posture difference in the horizontal direction. The posture V detection unit 360b detects a posture difference in the vertical direction. The posture Z detection unit 360c detects a posture difference in the front-rear direction (Z direction). For the posture detection circuit 360, for example, an angular velocity sensor or a gyro sensor is used. Information regarding the posture difference in each direction detected by the posture detection circuit 360 is supplied to the FPU 310.

  The wireless unit 370 performs wireless communication with the wireless unit 116 provided in the camera body 100 using a known technique, thereby realizing wireless communication between the CCPU 101 and the FPU 310. The strobe IF circuit 380 is an interface on the strobe device 300 side for communication between the FPU 310 and the CCPU 101 via the terminal 130, and details will be described later. In the imaging system 10 configured as described above, the CCPU 101, the LPU 201, and the FPU 310 cooperate to control each part of the imaging system 10, thereby realizing a smooth operation of the entire imaging system 10.

  Next, a circuit configuration for performing communication between the FPU 310 and the CCPU 101 via the terminal 130 will be described. FIG. 3 is a block diagram illustrating a schematic configuration of a communication circuit between the FPU 310 and the CCPU 101. The CCPU 101 and the FPU 310 have a peripheral communication function, and communicate with each other via the camera IF circuit 150 and the strobe IF circuit 380. The terminal 130 connects the camera IF circuit 150 and the strobe IF circuit 380 so that they can communicate with each other. The camera IF circuit 150 and the CCPU 101 are connected by an existing serial communication SPI, and the camera IF circuit 150 performs level conversion of the serial communication SPI from the CCPU 101 and the like. Details of a connection circuit between the strobe IF circuit 380 and the FPU 310 will be described later.

  The terminal 130 includes an A terminal 130a, a B terminal 130b, a C terminal 130c, a D terminal 130d, an E terminal 130e, and an F terminal 130f. The camera IF circuit 150 and the strobe IF circuit 380 each have an ANALOG terminal, an SCLK_S terminal, a MOSI_S terminal, a MISO_S terminal, and an X terminal.

  The A terminal 130a is a terminal for the CCPU 101 to control the FPU 310 with an analog signal, and is connected to the ANALOG terminal. In the present embodiment, the A terminal 130 a is a terminal for connecting a signal line for determining whether the strobe device 300 is connected to or disconnected from the camera body 100. That is, the A terminal 130a is a terminal for causing at least one of the CCPU 101 and the FPU 310 to recognize the other state by outputting an analog signal from the CCPU 101 to the FPU 310 or from the FPU 310 to the CCPU 101. Note that an analog signal refers to a signal that gives meaning to a voltage value or a current value itself. For example, when the voltage x [v] is output from the CCPU 101 to the FPU 310 through the ANALOG terminal, the FPU 310 recognizes that the camera body 100 is ready for release.

  Note that a resistor 151 is provided at the ANALOG terminal of the camera IF circuit 150, and the camera IF circuit 150 is connected to the strobe IF circuit 380 via the resistor 151 and the A terminal 130a. A combined resistance of the resistor 151 and a later-described resistor 384 becomes a resistor for determining whether the strobe device 300 is connected to or disconnected from the camera body 100. Note that the resistor 151 and the resistor 384 are pull-down resistors.

  The B terminal 130 b is a clock terminal for serial communication, and is connected to an SCLK_S terminal for synchronizing communication between the CCPU 101 and the FPU 310. The C terminal 130 c is one of terminals for performing serial communication, and is connected to a MOSI_S terminal that transmits a signal (data) from the CCPU 101 to the FPU 310. The D terminal 130 d is one of terminals for performing serial communication, and is connected to a MISO_S terminal that transmits a signal (data) from the FPU 310 to the CCPU 101. The E terminal 130e is one of terminals for performing serial communication, and is connected to an X terminal for transmitting a synchronization timing signal from the CCPU 101 to the FPU 310. The F terminal 130f is a GND terminal for connecting the camera body 100 (CCPU 101) and the strobe device 300 (FPU 310) and dropping them to the ground potential.

  The strobe IF circuit 380 includes a determination signal output circuit 381, an analog switch 382, a resistor 383, a resistor 384, a determination signal input circuit 385, an analog switch 386, an analog control circuit 387, an inverter circuit 388, and a serial communication IF circuit 389. The determination signal output circuit 381 is a signal output circuit for determining whether the strobe device 300 is connected / disconnected to the camera body 100, and is connected to the ST_OUT1 terminal of the FPU 310. The determination signal output circuit 381 outputs a determination signal to the analog switch 382 when the FPU 310 outputs an H level signal to the ST_OUT1 terminal, and stops outputting the determination signal to the analog switch 382 when an L level signal is output.

  FIG. 4 is a block diagram showing a schematic configuration of an example of the determination signal output circuit 381. The determination signal output circuit 381 may be a circuit that outputs a constant voltage obtained by dividing the constant voltage power supply V1 by the resistors 381a and 381b via the analog switch 382. The control terminal of the analog switch 381c is connected to ST_OUT1 of the FPU 310. The determination signal output circuit 381 controls the output of the determination signal by short-circuiting the analog switch 381c when an H level signal is input from ST_OUT1, and releasing the analog switch 381c when an L level signal is input from ST_OUT1. To do.

  The analog switch 382 is short-circuited when an H level signal is input to the determination signal output circuit 381 in accordance with a signal output from the ST_SW1 terminal of the FPU 310, and is released when an L level signal is input. The logic of ST_SW1 can be configured in reverse. One end of the analog switch 382 is connected to the A terminal 130 a via the resistor 383, and the other end of the analog switch 382 is connected to the determination signal output circuit 381. When the analog switch 382 is short-circuited, the A terminal 130 a and the determination signal output circuit 381 are connected via the resistor 383. The resistors 383 and 384 divide the output voltage from the analog switch 382, and a determination signal input circuit 385 (AD conversion) is connected to the voltage dividing point.

  The determination signal input circuit 385 is a signal input circuit for determining connection / disconnection of the strobe device 300 with respect to the camera body 100, and performs A / D conversion of a signal acquired through the A terminal 130a. The determination signal input circuit 385 is connected to the ST_IN terminal of the FPU 310, and the FPU 310 determines connection / disconnection of the strobe device 300 with respect to the camera body 100 based on a voltage value acquired through the determination signal input circuit 385. For example, the threshold value for determining the connection of the strobe device 300 to the camera body 100 is Vth [V]. When the voltage value acquired through the determination signal input circuit 385 is less than or equal to the threshold, it is determined as “connected”, and when it is greater than the threshold, it can be determined as “not connected”. This is because when the strobe device 300 is connected to the camera body 100 via the terminal 130, the voltage drop is set differently depending on the load on the camera body 100.

  The output voltage of the determination signal output circuit 381 is Vout, the terminal voltage of the A terminal 130a is V_130a, the resistance values of the resistors 383, 384, and 151 are R2, R3, and R4, respectively, and the combined resistance value of the resistors 384 and 151 is R5. . Then, the terminal voltage V_130a (not connected) of the A terminal 130a when not connected is expressed by the following expression 1, and the terminal voltage V_130a (connected) of the A terminal 130a when connected is expressed by the following expression 2. Here, since R4> R5, when the following formulas 1 and 2 are compared, “V_130a (not connected)> V_130a (connected)”. Therefore, by setting the threshold value Vth to an intermediate value between V_130a (not connected) and V_130a (connected), it is possible to determine whether the strobe device 300 is connected to or disconnected from the camera body 100. Note that the A / D conversion circuit of the determination signal input circuit 385 may be provided in the FPU 310.

  The analog switch 386 has one end connected to the A terminal 130a and the other end connected to the analog control circuit 387, and connects the A terminal 130a and the analog control circuit 387 by short-circuiting. A control terminal (not shown) of the analog switch 386 is connected to the ST_SW2 terminal of the FPU 310 via the inverter circuit 388. The analog switch 386 is short-circuited when an H level signal is input from the inverter circuit 388 and is released when an L level signal is input. The inverter circuit 388 has an input side connected to the ST_SW2 terminal of the FPU 310 and an output side connected to the control terminal of the analog switch 386. When the ST_SW2 terminal is at the H level, the inverter circuit 388 is at the L level, so that the analog switch 386 is opened, and the A terminal 130a and the analog control circuit 387 are disconnected. When the ST_SW2 terminal is at L level, the inverter circuit 388 is at H level, so that the analog switch 386 is short-circuited and the A terminal 130a and the analog control circuit 387 are connected. Note that the logic of ST_SW3 can be reversed.

  The analog control circuit 387 performs AF auxiliary light emission control and charging completion control via the A terminal 130a. Here, the serial communication IF circuit 389 is an interface for performing a three-wire serial connection. That is, the synchronous clock signal input from the SCLK_S terminal of the camera IF circuit 150 to the serial communication IF circuit 389 via the B terminal 130b is level-converted by the serial communication IF circuit 389 and output to the SCLK_S terminal of the FPU 310. . A signal (camera information) input from the MOSI_S terminal of the camera IF circuit 150 to the serial communication IF circuit 389 via the C terminal 130c is level-converted by the serial communication IF circuit 389 and output to the MOSI_S terminal of the FPU 310. . A signal (strobe information) input from the MOSI_S terminal of the FPU 310 to the serial communication IF circuit 389 is level-converted by the serial communication IF circuit 389 and is output to the MISO_S terminal of the camera IF circuit 150 via the D terminal 130d. The connection between the serial communication IF circuit 389 and the camera IF circuit 150 is not limited to three-wire serial communication, and may be two-wire. The sync timing signal input from the X terminal of the camera IF circuit 150 to the strobe IF circuit 380 via the E terminal 130e is input to the X terminal of the FPU 310, and the FPU 310 passes the discharge tube 305 in accordance with the received sync timing signal. Make it emit light.

  An example of data communication through the terminal 130 will be described with reference to FIGS. FIG. 5A is a timing chart of data communication. When data is transmitted from the CCPU 101 to the FPU 310, the data is serially transmitted by setting each bit to 0 and 1 from the MOSI_S terminal in synchronization with the 8-bit clock of the SCLK_S terminal. Further, when data is transmitted from the FPU 310 to the CCPU 101, data in which each bit is 0 and 1 is transmitted serially from the MISO_S terminal in synchronization with the 8-bit clock of the SCLK_S terminal. In the timing chart of 8-bit (1 byte) communication in FIG. 5A, the signal is read and written at the rising edge of the SCLK_S signal. However, this 8-bit communication is continuously performed a plurality of times for the command, command data, and data. Is sent.

  FIG. 6 is a list of commands used for communication between the CCPU 101 and the FPU 310. 6A is a list of commands transmitted from the FPU 310 to the CCPU 101, and FIG. 6B is a list of commands transmitted from the CCPU 101 to the FPU 310. FIGS. 5B and 5C are diagrams illustrating examples of commands for setting / canceling auto-bounce flash photography from the CCPU 101 (camera body 100) to the FPU 310 (strobe device 300). When setting the auto bounce flash shooting, the CCPU 101 sets the CS communication 80H in the first byte, the command number 011 (0BH) in the second byte, 01 (setting) of data (content) in the third byte, 16 Convert from a base number to a binary number and send to FPU 310. Thus, at the first byte, the command CS: 80H is transmitted to the FPU 310 when the CCPU 101 transmits data to the FPU 310, and the command SC: 01H is transmitted from the CCPU 101 to the FPU 310 when the CCPU 101 acquires data from the FPU 310. In the second byte, the command number is a number following SC and CS (converted to hexadecimal when transmitting), and the setting item data is transferred from one of the CCPU 101 and FPU 310 to the other in the third and fourth bytes. Sent.

  FIGS. 5D and 5E are diagrams showing examples of commands when the CCPU 101 performs distance measurement for auto-bounce flash photography from the FPU 310, and here, setting / cancellation of auto-bounce flash photography is also shown. The command is transmitted and received in the same manner as in. Since the commands shown in FIGS. 5D and 5E are shown in FIG. 6, detailed description thereof is omitted. When the CCPU 101 notifies the FPU 310 that the activation of the CCPU 101 has been completed, the FPU 310 recognizes that the CCPU 101 is in a dormant state and prohibits communication with the CCPU 101. Even when the CCPU 101 and the FPU 310 have never communicated after the strobe device 300 is mounted on the camera body 100, communication from the FPU 310 to the CCPU 101 is prohibited.

  Next, a first embodiment of auto bounce flash photography with the imaging system 10 will be described. First, the processing content (control method) in the camera body 100 at the time of execution of auto bounce flash photography according to the first embodiment will be described. 7 and 8 are flowcharts of processing in the camera body 100 when performing auto-bounce flash photography. Note that the flowchart of FIG. 8 explains processing following the flowchart of FIG. Each process in the flowcharts of FIGS. 7 and 8 is realized by the CCPU 101 controlling the operation of each unit constituting the camera body 100 by the CPU developing a predetermined program stored in the ROM in the RAM. The When the power switch included in the input unit 112 is turned on, the CCPU 101 becomes operable.

  In step S1, the CCPU 101 initializes its own memory and port. Further, the CCPU 101 reads the state of the switch included in the input unit 112 and preset input information, and sets a shooting mode suitable for the subject. In step S2, the CCPU 101 determines whether or not the release button included in the input unit 112 is half pressed and the release switch SW1 is turned on. The CCPU 101 waits until the release switch SW1 is turned on (NO in S2). If the CCPU 101 determines that the release switch SW1 is turned on (YES in S2), the process proceeds to step S3.

  In step S <b> 3, the CCPU 101 communicates with the LPU 201 of the lens barrel 200 via the communication line LC to acquire focal length information, focus adjustment, and optical information (lens information) necessary for photometry. In step S <b> 4, the CCPU 101 determines whether the strobe device 300 is attached to the camera body 100. If the CCPU 101 determines that the strobe device 300 is attached (YES in S4), the process proceeds to step S5. If the CCPU 101 determines that the strobe device 300 is not attached (NO in S4), the process proceeds to step S8b. Proceed to The details of the process for determining whether or not the strobe device 300 is attached to the camera body 100 will be described later.

  In step S5, the CCPU 101 communicates with the FPU 310 of the strobe device 300 via the communication line SC, and acquires strobe information such as the ID of the strobe device 300, a guide number, and charging information indicating the charging state of the main capacitor 302d. Also, the CCPU 101 transmits the focal length information acquired in step S3 to the FPU 310. Accordingly, the FPU 310 calculates the driving amount of the strobe optical system 307 based on the focal length information received from the CCPU 101, and moves the strobe optical system 307 based on the calculated driving amount to focus the irradiation range of the strobe device 300. Change the range to match the distance.

  In step S <b> 6, the CCPU 101 prepares to transmit information regarding the strobe device 300 input via the input unit 112 to the FPU 310 of the strobe device 300. For example, whether or not the camera body 100 is capable of auto-bounce flash photography, settings in the camera body 100 regarding auto-bounce flash photography, the state of the release button, and the like are converted into command transmission. In step S <b> 7, the CCPU 101 transmits information regarding the strobe device 300 prepared in step S <b> 6 to the strobe device 300.

  In step S8a, the CCPU 101 determines whether or not the focus adjustment mode set in the camera body 100 is the AF mode. If the CCPU 101 determines that the AF mode is set (YES in S8a), the process proceeds to step S9a. On the other hand, if the CCPU 101 determines that the AF mode is not set (NO in S8a), the CCPU 101 determines that the manual focus mode (MF mode) is set, and the process proceeds to step S11.

  In step S9a, the CCPU 101 drives the focus detection circuit 107 to perform a focus detection operation by a known phase difference detection method. In step S9a, a focus point (ranging point) to be focused from a plurality of focus points in focus adjustment is a well-known automatic selection algorithm based on the concept of near point priority or a user's input to the input unit 112. It is determined according to the operation. In step S10a, the CCPU 101 stores the distance measurement point determined in step S9a in the RAM in the CCPU 101. In step S10a, the CCPU 101 calculates the driving amount of the lens group 202 based on the focus information from the focus detection circuit 107, communicates with the LPU 201, and moves the lens group 202 based on the calculated driving amount. After step S10a, the process proceeds to step S11.

  In step S <b> 11, the CCPU 101 determines whether or not to perform an operation for automatically determining the irradiation direction in auto bounce flash photography (hereinafter referred to as “auto bounce operation”). Whether or not to perform the auto bounce operation is determined based on the state of a switch for switching whether or not to execute the auto bounce operation included in the input unit 112 or the input unit 312, the state of the other camera body 100, or the like. If the CCPU 101 determines to execute the auto bounce operation (YES in S11), the process proceeds to step S12. If the CCPU 101 determines not to perform the auto bounce operation (NO in S11), the process proceeds to step S16. In step S12, the CCPU 101 executes a process related to the auto bounce operation (hereinafter referred to as “bounce process”). Details of the bounce process will be described later.

  In step S13 after step S12, the CCPU 101 determines whether or not an error has occurred in the auto bounce process. If the CCPU 101 determines that an error has occurred in the auto bounce process (YES in S13), the process proceeds to step S14. If the CCPU 101 determines that no error has occurred in the auto bounce process (NO in S13), the process proceeds to step S16. Proceed to When an error occurs in the auto bounce process, information indicating that an error has occurred in the auto bounce process is transmitted from the FPU 310 to the CCPU 101 in the bounce process (step S12). In step S14, the CCPU 101 displays information (warning) indicating that an error has occurred in the bounce process on the display unit 113. Such warning display may be displayed on the display unit 313 of the strobe device 300 in accordance with a command from the CCPU 101 to the FPU 310. In step S15, the CCPU 101 switches to a setting for not performing flash photography (non-flash setting), and then proceeds to step S16.

  The processes in steps S8b, S9b, and S10b that are executed when it is determined in step S4 that the strobe device 300 is not connected are the same as the processes in steps S8a, S9a, and S10a described above, and thus the description thereof is omitted. . When the determination in step S8b is NO or the process in step S10b is completed, the CCPU 101 advances the process to step S16.

  In step S <b> 16, the CCPU 101 controls the photometry circuit 106 to perform photometry, and acquires a photometry result from the photometry circuit 106. For example, when the photometry sensor of the photometry circuit 106 performs photometry in each of the divided areas, the CCPU 101 determines the brightness value of each area as an obtained photometry result as EVb (i) (i = 0 to 5). Is stored in the RAM. In step S <b> 17, the CCPU 101 controls the gain switching circuit 108 to switch the gay according to the gain setting input through the input unit 112. The gain setting is, for example, ISO sensitivity setting. In step S <b> 17, the CCPU 101 communicates with the FPU 310 and transmits, for example, gain setting information after gain switching to the FPU 310.

  In step S18, the CCPU 101 determines an exposure value (EVs) by performing an exposure calculation using a well-known algorithm based on the photometry result (the luminance value of each photometry area stored in the RAM) acquired in step S16. In step S <b> 19, the CCPU 101 determines whether a charge completion signal has been received from the FPU 310. If the CCPU 101 determines that the charging completion signal has been received (YES in S19), the process proceeds to step S20. If the CCPU 101 determines that the charging completion signal has not been received (NO in S19), the process proceeds to step S21. . In step S20, the CCPU 101 determines exposure control values (shutter speed (Tv) and aperture value (Av)) suitable for flash photography based on the exposure value calculated in step S18. On the other hand, in step S21, the CCPU 101 determines an exposure control value suitable for non-flash photography that does not cause the flash device 300 to emit light, based on the exposure value calculated in step S18. When either one of steps S20 and S21 is completed, the process proceeds to step S22.

  In step S22, the CCPU 101 determines whether or not the release button included in the input unit 112 is fully pressed and the release switch SW2 is turned on. If the CCPU 101 determines that the release switch SW2 is off (NO in S22), the process returns to step S2, and if it is determined that the release switch SW2 is on (YES in S22), the process proceeds to step S23. . Note that the processing after step S23 shown in the flowchart of FIG. 8 is processing related to flash photography. The processing related to non-flash photography is the same as the processing after step S23 except the processing for performing the main flash, and the description thereof is omitted.

  In step S <b> 23, the CCPU 101 controls the photometry circuit 106 to perform photometry in a state where the strobe device 300 is not emitting light, and obtains a photometry result when no light is emitted (luminance value when no light is emitted) from the photometry circuit 106. And CCPU101 memorize | stores the luminance value at the time of non-light-emitting of each area | region as EVa (i) (i = 0-5) in RAM. In step S24, the CCPU 101 instructs the FPU 310 to perform pre-flash via the communication line SC. The FPU 310 controls the trigger circuit 303 and the light emission control circuit 304 in accordance with a command from the CCPU 101 to perform pre-light emission with a predetermined light amount. In step S <b> 25, the CCPU 101 controls the photometry circuit 106 to perform photometry while the strobe device 300 is pre-flashed, and obtains a photometric result (pre-light emission luminance value) from the photometry circuit 106. And CCPU101 memorize | stores the brightness value at the time of pre light emission of each area | region acquired in EV as EVf (i) (i = 0-5).

  In step S26, the CCPU 101 raises the main mirror 104 prior to exposure and retracts it from the imaging optical path. In step S <b> 27, the CCPU 101 extracts the luminance value EVdf (i) of only the reflected light component of the pre-light emission based on the luminance value at the time of non-light emission and the luminance value at the time of pre-light emission as shown in the following Expression 3. This extraction process is performed every six regions (i = 0 to 5). In step S <b> 28, the CCPU 101 acquires pre-flash information Qpre indicating the light emission amount during pre-flash from the FPU 310 via the communication line SC.

  In step S <b> 29, the CCPU 101 selects which of the six photometry areas the subject should have an appropriate amount of light emission from the distance measurement point, focal length information, pre-emission information Qpre, and communication contents with the FPU 310. Then, the main light emission amount is calculated. In the calculation of the main light emission amount, the subject in the selected region (P) is determined to be appropriate for the pre-light emission amount based on the exposure value EVs, the subject luminance EVb, and the luminance value EVdf (p) of the pre-light emission reflected light only. The relative ratio r of the actual light emission amount is calculated by the following equation 4. Here, the difference between the exposure value EVs and the extension of the subject brightness EVb is taken because the exposure when the illumination light is irradiated is controlled so as to be appropriate by adding the illumination light to the external light. is there.

  In step S <b> 30, the CCPU 101 corrects the relative ratio r using the shutter speed Tv during flash photography, the pre-flash emission time t_pre, and the correction coefficient c set in advance by the input unit 112, as shown in Equation 5 below. A new relative ratio r ′ is calculated. The reason why the relative ratio r is corrected using the shutter speed Tv and the pre-emission emission time t_pre is to correctly compare the photometric integration value INTp during pre-emission and the photometry integration value INTm during main emission.

  In step S <b> 31, the CCPU 101 transmits information regarding the relative ratio r ′ for determining the main light emission amount to the FPU 310. In step S32, the CCPU 101 issues a command to the LPU 201 so that the aperture value Av determined in step S20 is reached, and controls the shutter 103 so that the determined shutter speed Tv is obtained. In step S33, the CCPU 101 instructs the FPU 310 to execute main light emission via the communication line SC. Thereby, the FPU 310 performs the main light emission based on the relative ratio r ′ transmitted from the CCPU 101. When a series of exposure operations is completed in this way, in step S34, the CCPU 101 lowers the main mirror 104 that has been retracted from the photographing optical path, and again places it obliquely in the photographing optical path.

  In step S <b> 35, the CCPU 101 amplifies the signal output from the image sensor 102 by the gain switching circuit 108 with the set gain, and converts the amplified signal into a digital signal by the A / D converter 109. The CCPU 101 performs predetermined signal processing such as white balance on the image data converted into a digital signal by the signal processing circuit 111. In step S36, the CCPU 101 stores the image data that has undergone signal processing in a storage device such as a flash memory (not shown), thereby ending a series of imaging processing. Therefore, in order to perform imaging again, in step S37, the CCPU 101 determines whether or not the release switch SW1 is on. If the CCPU 101 determines that the release switch SW1 is on (YES in S37), the process returns to step S22. If the CCPU 101 determines that the release switch SW1 is not on (NO in S37), the process proceeds to step S2. Return to.

  Next, the process of step S12 described above will be described in detail. FIG. 9 is a flowchart of the bounce process in step S12. Each process shown in the flowchart of FIG. 9 is executed by the FPU 310 in accordance with a bounce process start instruction from the CCPU 101. Each process of the flowchart of FIG. 9 is realized by the FPU 310 controlling the operation of each unit constituting the strobe device 300 by causing the CPU to expand a predetermined program stored in the ROM into the RAM.

  In step S101, the FPU 310 determines whether or not to execute an auto bounce operation. This determination is based on the state of the auto bounce switch for switching whether to execute the auto bounce operation included in the input unit 112 of the camera body 100 or the input unit 312 of the strobe device 300, the state (setting) of the camera body 100, and the like. Is judged. If it is determined that the auto bounce operation is to be executed (YES in S101), the FPU 310 advances the process to step S102. If the FPU 310 does not execute the auto bounce operation (NO in S101), the FPU 310 terminates this process, and the process thereby proceeds to step S13. It will be advanced to.

  In step S <b> 102, the FPU 310 determines connection to the camera body 100. Details of the processing in step S102 will be described later. In step S103, the FPU 310 determines whether or not the strobe device 300 is connected to the camera body 100 so as to be communicable based on the result of step S102. If it is determined that the FPU 310 is communicably connected to the camera body 100 (YES in S103), the process proceeds to step S107, and if it is determined that the FPU 310 is not communicably connected to the camera body 100 (NO in S103). ), The process proceeds to step S104.

  In step S104, the FPU 310 prohibits the bounce operation. Here, not only the auto bounce operation but also the operation of the auto bounce switch included in the input unit 112 and the input unit 312 for switching whether or not to execute the auto bounce operation and the switch for selecting the type of auto bounce are prohibited. . In step S <b> 105, the FPU 310 displays a message indicating that the camera body 100 and the strobe device 300 are not connected on the display unit 113 and the display unit 313. The message here can prompt the user to connect the strobe device 300 to the camera body 100, and is displayed for a certain period of time. In step S106, the FPU 310 determines whether or not a certain time for displaying the message has elapsed (whether or not to end the message display). The FPU 310 waits until a predetermined time elapses (NO in S106). If it is determined that the predetermined time has elapsed (YES in S106), the FPU 310 ends the process and advances the process to step S13.

  In step S107 after the determination in step S103 is YES, the FPU 310 permits a bounce operation. In subsequent step S108, the FPU 310 performs an auto bounce operation. Details of the auto bounce operation will be described later. The process is terminated by the end of step S108, and the process proceeds to step S13.

  Next, step S102 described above will be described in detail. FIG. 10 is a flowchart of the camera connection determination executed in step S102. FIG. 11 is a timing chart of the camera connection determination executed in step S102.

  In step S201, the FPU 310 sets its own ST_SW2 to the H level and disconnects the analog switch 386. As a result, the analog control circuit 387 and the A terminal 130a are disconnected. In step S202, the FPU 310 outputs an H level to its own ST_OUT1 terminal. In step S203, the FPU 310 outputs an H level to its own ST_SW1 terminal. Thus, when the H level is input to the control terminal of the analog switch 382, the analog switch 382 is short-circuited, and the A terminal 130a and the determination signal output circuit 381 are connected.

  In step S204, the FPU 310 performs A / D conversion on the voltage of the A terminal 130a by the determination signal input circuit 385. In step S205, the FPU 310 stores the voltage V_130a of the A terminal 130a at the ST_IN terminal. In step S206, the FPU 310 outputs an L level to the ST_SW1 terminal and disconnects the analog switch 382. In step S207, the FPU 310 determines whether the terminal voltage V_130a of the A terminal 130a is greater than the threshold value Vth. As described above, when V_130a> Vth, it is determined as “not connected”, and when V_130a ≦ Vth, it is determined as “connected”. If the FPU 310 determines that V_130a> Vth (YES in S207), the process proceeds to step S208. In step S208, the FPU 310 determines that the strobe device 300 is not connected to the camera body 100, and stores the information in the RAM. Remember. On the other hand, if the FPU 310 determines that V_130a ≦ Vth (NO in S207), the process proceeds to step S209. In step S209, the FPU 310 determines that the strobe device 300 is connected to the camera body 100, and stores the information. Store in RAM.

  In step S210 after the processing of either step S208 or S209 is executed, the FPU 310 sets its own ST_SW2 to L level and short-circuits the analog switch 386 to connect the analog control circuit 387 and the A terminal 130a. As a result, this process ends, and the FPU 310 advances the process to step S103.

  Next, step S108 in the flowchart of FIG. 9 will be described in detail. Here, an example of a method for detecting the rotation range and posture (rotation angle) of the movable portion 300b of the strobe device 300 will be described with reference to FIGS. 12 to 14, and then the processing of step S108 will be described with reference to the flowchart of FIG. The description will be given with reference.

  FIG. 12A is a side view showing the pivoting state of the movable part 300b in the vertical direction and the horizontal direction, and FIG. 12B is a top view corresponding to FIG. The movable part 300b is held so as to be rotatable independently of the main body part 300a in the vertical direction and the horizontal direction. When the direction of the light emitting part of the movable part 300b is 0 degree in the vertical direction as shown in FIG. 12A and 0 degree in the horizontal direction as shown in FIG. 12B, the movable part 300b is It shall be in the reference position.

  FIG. 13A is a diagram showing the output of the rotary encoder when the rotary angle of the movable unit 300b is detected by a rotary encoder using a 4-bit gray code. FIG. 13B is a diagram showing the output of the rotary encoder when the rotation angle in the left-right direction of the movable part 300b is detected by a rotary encoder using a 4-bit gray code. In each state of FIG. 12, the index m indicated by a circle and a line corresponds to the angle of the rotary encoder of FIG.

  FIG. 13C is a schematic diagram illustrating the configuration of the detection unit 930 of the rotary encoder that detects the rotation in the vertical direction. FIG. 14A is a diagram illustrating allocation of gray codes and rotation angles of a rotary encoder that detects rotation in the vertical direction. The detection unit 390 of the rotary encoder has detection chips 390a, 390b, 390c, and 390d constituted by a photo reflector and a photo interrupter, and the signal shown in FIG. 14 (a) is generated according to the rotation angle of the movable part 300b. Output from each detection chip. As shown in FIG. 14A, since the rotary encoder outputs a different signal according to the vertical rotation angle of the movable part 300b, the second bounce angle detection circuit 340c is arranged in the vertical direction of the movable part 300b. The driving amount can be detected.

  FIG. 13D is a schematic diagram illustrating the configuration of the detection unit 395 of the rotary encoder that detects rotation in the left-right direction. FIG. 14B is a diagram showing allocation of gray codes and rotation angles of a rotary encoder that detects rotation in the left-right direction. The detection unit 395 of the rotary encoder has detection chips 395a, 395b, 395c, and 395d formed of a photo reflector and a photo interrupter, and the signal shown in FIG. 14B is generated according to the rotation angle of the movable part 300b. Output from each detection chip. As shown in FIG. 14B, since the rotary encoder outputs a different signal according to the rotation angle of the movable unit 300b in the left-right direction, the first bounce angle detection circuit 340a has the left-right direction of the movable unit 300b. The driving amount can be detected.

  FIG. 15 is a flowchart of the auto bounce operation executed in step S108. In step S301, the FPU 310 controls the first bounce drive circuit 340b and the second bounce drive circuit 340d so that the flash irradiation direction is the front direction of the camera body 100 (the subject may be flashed). The movable part 300b is driven (as possible). That is, the movable part 300b is in a state at the reference position where the bounce angle is 0 degree. Although the details of the drive control in step S301 will be described later, the FPU 310 determines the drive amount of the movable part 300b by setting the target horizontal bounce angle θX, the target vertical bounce angle θY, which are target values for the bounce drive, and the main body part 300a. Calculated with the amount γ taken into account. In step S <b> 302, the FPU 310 instructs the light emitting unit of the strobe device 300 to perform pre-flash after the flash irradiation direction becomes the front direction of the camera body 100. In step S302, the FPU 310 controls the distance measuring unit 308 to calculate the subject distance (the distance from the irradiation surface of the light emitting unit to the subject).

  In step S303, the FPU 310 controls the first bounce drive circuit 340b and the second bounce drive circuit 340d to drive the movable unit 300b so that the flashing direction is the ceiling direction opposite to the direction of gravity. For example, when the movable unit 300b faces the front direction of the camera body 100, if the drive target is the ceiling direction, the target horizontal bounce angle θX = 0 and the target vertical bounce angle θY = 90−γ are obtained. Details of the drive control in step S303 will be described later. In step S304, the FPU 310 instructs the light emitting unit of the strobe device 300 to execute pre-flash after the flash irradiation direction has become the ceiling direction. In step S304, the FPU 310 controls the distance measuring unit 308 to calculate a ceiling distance (a distance from the irradiation surface of the light emitting unit to the ceiling).

  In step S305, the FPU 310 calculates an optimum flash irradiation direction (optimum bounce angle) for auto bounce flash photography based on the subject distance and ceiling distance acquired in steps S302 and S304. That is, the FPU 310 calculates the target horizontal bounce angle θX and the target vertical bounce angle θY that indicate the optimal bounce angle. In step S305, the FPU 310 stores the calculated optimum bounce angle in the RAM. In step S306, the FPU 310 controls the first bounce drive circuit 340b and the second bounce drive circuit 340d to drive the movable unit 300b so that the flash irradiation direction becomes the optimum bounce angle. Thereby, this process is complete | finished and a process is advanced to step S13.

  FIG. 16 is a flowchart of bounce drive control in steps S301, S303, and S306. In steps S301, S303, and S306, the drive control flow is the same except that the target angle for driving the movable part 300b is different. In step S401, the FPU 310 controls the first bounce drive circuit 340b and the second bounce drive circuit 340d to start driving the movable unit 300b. In step S402, the FPU 310 acquires a horizontal bounce angle θA and a vertical bounce angle θB indicating the current position of the movable unit 300b from the first bounce angle detection circuit 340a and the second bounce angle detection circuit 340c. In step S402, the FPU 310 determines whether the horizontal bounce angle θA and the vertical bounce angle θB match the target horizontal bounce angle θX and the target vertical bounce angle θY, respectively. If the FPU 310 determines that θX ≠ θA or θY ≠ θB (NO in S402), the FPU 310 repeats the determination in step S402, and if it is determined that θX = θA and θY = θB (YES in S402), the process is performed. Proceed to step S403.

  In step S403, the FPU 310 controls the first bounce drive circuit 340b and the second bounce drive circuit 340d to stop driving the movable unit 300b. In step S <b> 404, the FPU 310 transmits a bounce drive end notification to the camera body 100 via the strobe IF circuit 380 and the terminal 130. As described above, according to the above-described embodiment, when the strobe device 300 is not connected to the camera body 100 via the terminal 130, control is performed so that the bounce operation is not performed. Can be avoided.

  Next, processing contents in auto bounce flash photography according to the second embodiment will be described. In the first embodiment described above, wireless communication using the wireless units 116 and 370 is not used. On the other hand, in the second embodiment, the camera body 100 and the strobe device 300 are communicably connected to each other by wireless communication by the wireless units 116 and 370, and auto bounce flash photography with the strobe device 300 is controlled. explain. In the following description by wireless communication, only differences from the first embodiment will be described, and common description will be omitted.

  The determination in step S4 in the flowchart of FIG. 7 is YES because the camera body 100 and the strobe device 300 are communicably connected by wireless communication. FIG. 17 is a flowchart for explaining the processing in step S12 when the camera body 100 and the flash device 300 are connected to be communicable by wireless communication, and corresponds to the flowchart of FIG. In the flowchart of FIG. 17, the same steps as those in the flowchart of FIG. 9 are denoted by the same step numbers, and description thereof is omitted.

  In step S <b> 102 a, the FPU 310 determines connection to the camera body 100. In step S103a, the FPU 310 determines whether the strobe device 300 is wirelessly connected to the camera body 100 based on the result of step S102a. If it is determined that the FPU 310 is wirelessly connected to the camera body 100 (YES in S103), the process proceeds to step S107. If the FPU 310 determines that the camera body 100 is not wirelessly connected (NO in S103), the process is performed. Proceed to step S104.

  FIG. 18 is a flowchart of camera connection determination executed in step S102a, and corresponds to the flowchart of FIG. In the flowchart of FIG. 18, the same processes as those in the flowchart of FIG. 10 are denoted by the same step numbers, and description thereof is omitted. In the flowchart of FIG. 18, the process of step S207a is inserted between step S207 and step S208. In step S207a, the FPU 310 determines whether the wireless unit 370 is wirelessly connected to the camera body 100 (wireless unit 116). If it is determined that the FPU 310 is wirelessly connected (YES in S207a), the process proceeds to step S209, and if it is determined that it is not wirelessly connected (NO in S207a), the process proceeds to step S208. The same effect as that of the first embodiment can be obtained by such processing.

  Next, processing contents in auto bounce flash photography according to the third embodiment will be described. In the first embodiment, if the camera body 100 and the strobe device 300 are not connected, the bounce operation of the strobe device 300 is prohibited. In this state, when the power of the strobe device 300 is turned off, the optimum bounce angle stored most recently is deleted. Therefore, when the flash device 300 is subsequently turned on and auto bounce flash photography is performed, the bounce angle is not stored. For this reason, after the movable part 300b is moved so that the flashing direction is the front direction of the camera body 100, the auto bounce operation is performed, and the rapid photographing property is impaired. In the third embodiment, the following configuration is added to the imaging system 10 in order to deal with this problem.

  FIG. 19 is a flowchart of bounce drive control when the power of the strobe device 300 is turned off, the strobe device 300 is connected to the camera body 100, and the power of the strobe device 300 is turned on. In step S501, the FPU 310 detects a current bounce angle of the strobe device 300 and a bounce angle stored in the RAM (refers to both a horizontal bounce angle and a vertical bounce angle, and hereinafter referred to as a “bounce storage angle”). Note that the bounce angle may be stored or updated after the strobe device 300 is turned on and before the strobe device 300 is connected to the camera body 100. In step S501, in consideration of such a situation, detection of the bounce memory angle is attempted.

  In step S502, the FPU 310 determines whether or not the bounce storage angle is 0 degrees (reference position). If the FPU 310 determines that the bounce storage angle is 0 degrees (YES in S502), the process proceeds to step S503. If the FPU 310 determines that the bounce storage angle is not 0 degrees (NO in S502), the process proceeds to step S505. Proceed to In step S503, the FPU 310 determines whether the actual bounce angle is 0 degrees. If the FPU 310 determines that the bounce angle is 0 degrees (YES in S503), the FPU 310 ends the process. If the FPU 310 determines that the bounce storage angle is not 0 degrees (NO in S503), the process proceeds to step S504. .

  In step S504, the FPU 310 drives the movable unit 300b so that the bounce angle (horizontal bounce angle and vertical bounce angle) is 0 degrees, as in step S301 of FIG. In step S505, the FPU 310 drives the movable part 300b to the stored bounce angle, similarly to step S301 in FIG. This process ends when one of steps S504 and S505 ends. With such a process, after the strobe device 300 is connected to the camera body 100, the strobe device 300 can be quickly driven to a predetermined position, so that auto bounce flash photography can be performed smoothly.

  Next, processing contents in auto bounce flash photography according to the fourth embodiment will be described. In the first embodiment, if the camera body 100 and the strobe device 300 are not connected, the bounce operation of the strobe device 300 is prohibited. When the optimum bounce angle stored simultaneously with the prohibition of the bounce operation is erased, the processing for auto bounce flash shooting is performed even if the strobe device 300 is connected to the camera body 100 again and shooting is performed at the same bounce angle. Need to be done from the beginning. In this case, extra power is consumed and time is lost. In the fourth embodiment, in order to cope with this problem, the bounce process in step S12 of FIG. 7 is improved.

  FIG. 20 is a flowchart of another bounce process in step S12. Of the processes in the flowchart of FIG. 20, the same processes as those in the flowchart of FIG. 9 are given the same step numbers, and descriptions of these processes are omitted. In the flowchart of FIG. 20, step S601 is added between step S104 and step S105, step S602 is added between step S107 and step S108, and the process of step S603 is added after step S108.

  In step S601 after step S104 where the bounce operation is prohibited because the strobe device 300 is not connected to the camera body 100, the FPU 310 holds the bounce angle storage. At this time, the bounce angle stored by the bounce angle storage switch of the input unit 312 is also held. FPU310 advances a process to step S105 after the process of step S601.

  In step S602 after step S107 in which the bounce operation of the strobe device 300 is permitted, the FPU 310 detects the stored bounce angle. FPU310 advances a process to step S108 after the process of step S602. In step S603 after completion of the bounce process in step S108, the FPU 310 updates the bounce angle storage. According to such processing, it is possible to quickly start shooting again at the bounce angle stored when the strobe device 300 is connected to the camera body 100 again.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary. For example, the order of processing in each flowchart described in the above embodiment is an example, and the order of processing may be changed as long as there is no inconvenience. The commands, command numbers, data items, and the like described with reference to FIGS. 5 and 6 are examples, and any setting may be used as long as they play the same role.

  The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

DESCRIPTION OF SYMBOLS 10 Imaging system 100 Camera body 101 CCPU (camera microcomputer)
DESCRIPTION OF SYMBOLS 106 Photometry circuit 107 Focus detection circuit 130 Terminal 140 Attitude detection circuit 150 Camera IF circuit 300 Strobe device 300b Movable part 308 Ranging unit 310 FPU (strobe microcomputer)
340 Bounce circuit 360 Attitude detection circuit 380 Strobe IF circuit

Claims (9)

A main body that can be attached to and detached from the imaging device;
A movable part having a light emitting part and held rotatably in a predetermined direction with respect to the main body part;
Communication means for communicating with the imaging device;
Driving means for driving the movable portion in accordance with an instruction for bounce flash photography to change the direction of light emitted from the light emitting portion;
Detecting means for detecting whether or not the image capturing apparatus is communicably connected;
An illuminating apparatus comprising: a control unit that prohibits the driving unit from driving the movable portion when the detecting unit detects that the imaging unit is not communicably connected.   The lighting device according to claim 1, wherein the communication unit mechanically connects the main body unit to the imaging device to connect the control unit and the imaging device by wired communication. The communication means includes
A terminal for connecting the control means and the imaging device;
A signal line for transmitting an analog signal between the control means and the imaging device via the terminal;
A circuit for outputting a predetermined voltage to the signal line,
The detection means is configured such that the control means and the imaging device are connected via the terminal based on the magnitude of the terminal voltage of the terminal when a predetermined voltage is output from the circuit to the signal line. It is detected whether it is connected, The illuminating device of Claim 2 characterized by the above-mentioned.   The lighting device according to claim 1, wherein the communication unit connects the control unit and the imaging device by wireless communication.   When the lighting device is turned on after the lighting device is connected to the imaging device, the control unit moves the movable unit by the driving unit so that the light-emitting unit faces a direction of a subject. It drives, The illuminating device of any one of Claim 1 thru | or 4 characterized by the above-mentioned. Storage means for storing a bounce angle of the movable part with respect to the main body part;
The control means is configured to cause the light emitting unit to face a bounce angle stored in the storage means when the illumination apparatus is turned on after the illumination apparatus is connected to the imaging apparatus. The illuminating device according to claim 1, wherein the movable portion is driven.   The said control means memorize | stores in the said memory | storage means the bounce angle of the said movable part when the said detection means detects that the said illuminating device and the said imaging device are not connected so that communication is possible. Item 7. The lighting device according to Item 6. An imaging device;
An illumination device connected to be communicable with the imaging device,
The lighting device includes:
A main body attached to and detached from the imaging device;
A movable part having a light emitting part and held rotatably in a predetermined direction with respect to the main body part;
Driving means for driving the movable portion in accordance with an instruction for bounce flash photography to change the direction of light emitted from the light emitting portion;
Detecting means for detecting whether or not the image capturing apparatus is communicably connected;
Control means for prohibiting driving of the movable part by the driving means when the detecting means detects that the illumination device and the imaging device are not connected to be communicable with each other. Imaging system. A method for controlling an illuminating device capable of changing the irradiation direction of light from the light emitting unit by automatically rotating and driving a movable unit including a light emitting unit in a predetermined direction in accordance with a light emission photographing instruction,
Detecting whether the illumination device is communicably connected to an imaging device;
And a step of prohibiting the rotational drive of the movable portion when it is detected that the illumination device is not communicably connected to the imaging device.