JP2020034814A - Twin stroboscope showing usage for maximizing number of light emission to light emission limit - Google Patents

Abstract

To provide a stroboscope having a plurality of light emission units allowing a user to know the usage for maximizing the number of light emissions to a light emission limit.SOLUTION: A stroboscope device (203) includes: a plurality of light emission units (205A and 205B) each capable of setting the light emission quantity; a control unit (108) for adding an integrated value corresponding to the light emission quantity when continuous light emission is performed, and performing light emission limit according to the integrated value sum total as the sum total of the added integrated value and the light emission quantity; and a display unit (123). The stroboscope device includes a light emission quantity switch timing calculation unit (108) for calculating the switch timing of the setting of the light emission quantity for maximizing the number of light emissions to a predetermined light emission limit, when the plurality of light emission units are set as different light emission quantities, and informs a user of the calculation result of the light emission quantity switch timing.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a strobe, and more particularly, to a light emission restriction in a strobe provided with a plurality of light emitting units during continuous light emission.

  At the time of continuous light emission of the strobe, problems such as melting of the light emitting part due to heat generation, damage of internal parts, and rise in the outer temperature have occurred. To solve this problem, Patent Document 1 discloses that when light emission is performed at an interval shorter than a predetermined time interval, a predetermined value corresponding to the amount of light emission is integrated, and when the integrated value is equal to or larger than a threshold value, A method for performing light emission restriction such as prohibiting a release operation is disclosed.

  Patent Literature 2 discloses a method of calculating a predetermined value according to a light emission amount in consideration of a zoom position of a strobe and a remaining voltage of a main capacitor after light emission, and extending a time limit of a light emission limit stepwise. I have.

JP 2001-66675 A JP 2008-185699 A

  However, when the conventional technique disclosed in the above-mentioned patent document is applied to a strobe provided with a plurality of light emitting units, the following problem occurs. When the light emitting amounts of the plurality of light emitting units are different, the temperature rise of the light emitting unit having the large light emitting amount is large. However, there is no need to limit the light emitting unit having the smaller light emission amount. Some flashes are accompanied by the display of a temperature rise warning, and if the warning is displayed, it may be recommended in the instruction manual to pause for a while. Can not be used without worrying about. If the user knows a usage method in which a plurality of light-emitting units simultaneously display a temperature rise warning display, the user can use the light-emitting unit without worrying about light emission restriction.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a strobe provided with a plurality of light-emitting units that can inform a user of how to maximize the number of times of light emission before light emission is restricted.

In order to achieve the above object, a strobe device according to the present invention includes:
A plurality of light emitting units each capable of setting a light emission amount, and an integrated value according to the light emission amount when emitting light continuously, and according to the total integrated value that is the sum of the added integrated values and the light emission amount. A strobe device having a control unit for performing light emission restriction by using a display unit,
When a plurality of light emitting units are set to different light emitting amounts, the light emitting unit includes a light emitting amount replacement timing calculating unit that calculates a timing of changing the setting of the light emitting amount to maximize the number of times of light emitting until a predetermined light emitting limit is applied, and the calculation result Is notified to the user.

  According to the present invention, it is possible to provide a strobe device provided with a plurality of light emitting units, which can notify a user of how to maximize the number of times of light emission before light emission is restricted.

Flow chart of the first embodiment Macro twin strobe diagram Electric circuit block diagram Light emission amount and integrated value table Total value and time limit table Total value and time limit table Number of flashes and time limit graph Example of temperature warning display Example of calculation result display Example of light emission amount replacement timing display Example of light emission amount replacement timing display Diagram of increase in number of flashes Diagram of increase in number of flashes Flowchart of Embodiment 2

  FIG. 2 shows a front view of a camera equipped with a macro twin strobe in the present embodiment.

  Reference numeral 200 denotes a camera main body, which includes an optical component, a mechanical component, an electric circuit, an image sensor, and the like so that a photograph can be taken. Reference numeral 201 denotes an accessory shoe provided on the camera body 200, to which a flash control unit 203 described later is attached. The accessory shoe 201 is provided with a contact group serving as an interface that enables communication between the camera body 200 and the flash control 203.

  Reference numeral 202 denotes a lens barrel detachable from the camera body 200. The lens barrel 202 houses a photographic lens composed of a plurality of lens groups. Reference numeral 203 denotes a flash control unit, which houses a control circuit for controlling flash emission, a flash power supply circuit serving as a power supply for flash emission, and the like.

  Reference numerals 205A and 205B denote light emitting units for irradiating strobe light, and accommodate therein a flash discharge tube, a reflector, a Fresnel lens, a light emitting circuit, and the like. Reference numerals 206A and 206B denote strobe irradiation windows disposed in front of the light emitting units 205A and 205B, and strobe light is emitted from the strobe irradiation windows 206A and 206B. The flash control unit 203 and the light emitting units 205A and 205B correspond to a flash light emitting device of the present invention.

  Reference numeral 204 denotes a ring adapter, which is detachably attached to the tip of the lens barrel 202 and holds the light emitting units 205A and 205B.

  Reference numerals 207A and 207B denote rotating members for rotating the light emitting units 205A and 205B back and forth and left and right, respectively, and can be mounted on the rotating members 208A and 208B provided on the light emitting units 205A and 205B and provided on the ring adapter 204. It is possible.

  Reference numerals 208A and 208B denote rotating members for rotating the outer circumference of the lens barrel 202 along the ring adapter 204 with the light emitting units 205A and 205B, respectively, and are provided on the ring adapter 204.

  Reference numerals 213A and 213B denote cords disposed between the flash control unit 203 and the light emitting units 205A and 205B. And are electrically connected.

  Next, a circuit configuration of the camera system according to the embodiment of the present invention will be described. FIG. 3 is an electric circuit block diagram of a camera system including a strobe according to the embodiment of the present invention.

  First, a circuit configuration arranged on the camera body 200 side will be described.

  Reference numeral 1 denotes a battery serving as a power supply of the camera body 200. Reference numeral 2 denotes a power supply circuit, and an output voltage from the power supply circuit 2 is supplied to each circuit described later. As the power supply circuit 2, for example, a constant voltage circuit that outputs a constant voltage even when the voltage of the battery 1 changes can be used. A DC / DC converter 3 boosts the voltage of the battery 1 and supplies it to the camera microcomputer 8 as a constant output voltage.

  A switch unit 4 includes a switch detection circuit 5 and a switch group 6. The switch detection circuit 5 detects the on / off state of each of the switches constituting the switch group 6 and outputs the detection signal to the camera microcomputer 8. The switch group 6 includes, for example, a switch (SW1) that is turned on when the release button is half-pressed, a switch (SW2) that is turned on when the release button is fully pressed, and a switch (aperture, shutter speed setting SW) for setting an exposure. ) Etc. are included.

  Reference numeral 7 denotes an EEPROM (ROM capable of electrically erasing and rewriting data) connected to the camera microcomputer 8. Setting information necessary for the camera operation is written in the EEPROM 7.

  Reference numeral 8 denotes a camera microcomputer, which has a microcomputer built-in one-chip IC circuit configuration including a CPU, a ROM, a RAM, an input / output control circuit (I / O CONTROL), a multiplexer, a timer circuit, etc., and can control the camera system by software. Things. Here, the EEPROM 7 may be built in the camera microcomputer 8.

  Reference numeral 9 denotes a distance measuring circuit for measuring a subject distance. Here, as a method of measuring the subject distance, an active method of projecting light from the camera body 200 side and receiving reflected light from the subject to obtain distance measurement information can be used. Further, it may be constituted by a line sensor provided corresponding to the screen and a drive circuit for controlling the drive of the line sensor. This drive circuit controls the accumulation of electricity in each sensor and reads the image signal from each sensor to calculate and detect where the subject image is in focus by the existing phase difference detection method. A method can be used.

  In the present embodiment, a subject light beam that has passed through the taking lens passes through a part of a main mirror (not shown) and is guided to a distance measuring device by a sub-mirror (not shown). Will be Then, a subject distance signal as a result of the measurement is output to the camera microcomputer 8 from the distance measuring device.

  Reference numeral 10 denotes a focal length detection circuit which sends focal length information of the photographing lens to the camera microcomputer 8. If the taking lens is a single lens, data indicating a fixed focal length is sent to the camera microcomputer 8. When the taking lens is a zoom lens, data indicating a focal length corresponding to a zoom stop position of the taking lens detected by a zoom encoder (not shown) is sent to the camera microcomputer 8.

  A display unit 11 includes a liquid crystal display (LCD) 12 and a liquid crystal display circuit 13. The LCD 12 displays information on camera shooting. The LCD 12 is attached to the inside of the viewfinder or the exterior of the camera body 200. Note that a TFT or the like may be used as a display element for displaying information regarding camera photographing, instead of the LCD. The liquid crystal display circuit 13 causes the LCD 12 to display information regarding camera shooting in accordance with a command from the camera microcomputer 8.

  Reference numeral 14 denotes a photometric circuit for measuring the luminance of the subject. The photometric circuit 14 receives data from the camera microcomputer 8 and sends data (subject brightness) necessary for determining an appropriate exposure to the camera microcomputer 8. The photometric circuit 14 also measures the amount of light during preliminary light emission.

  Reference numeral 15 denotes a dimming circuit, which detects light reflected by a subject by strobe light emission, and outputs a signal for stopping light emission when a proper exposure is obtained. This output signal is input from the camera microcomputer 8 to a flash microcomputer 108 described later via the contact group 17.

  Reference numeral 16 denotes an X contact, which is turned on in synchronization with the operation of a shutter (not shown) provided in the camera body 200, and transmits the flash emission timing to the flash microcomputer 108. One end of the X contact 16 is connected to S4 of the flash microcomputer 108 via the contact group 17, and the other end is at the GND level.

  A contact group 17 serves as an interface between the camera microcomputer 8 and the flash microcomputer 108. The camera microcomputer 8 and the flash microcomputer 108 can communicate with each other via the contact group 17. The contact group 17 is provided on the accessory shoe 201 as described above.

  Next, an interface terminal in the camera microcomputer 8 will be described. SCK is an output terminal of a synchronous clock for performing serial communication with the flash microcomputer 108. SDO is a serial data output terminal for performing serial communication with the flash microcomputer 108. SDI is a serial data input terminal for performing serial communication with the flash microcomputer 108. SCHG is an output terminal for detecting the completion of charging of the main capacitor that stores light emission energy in the flash control unit 203. Here, the SCK is connected to the S0 terminal of the flash microcomputer 108 via the contact group 17. The SDO is connected to the S1 terminal of the flash microcomputer 108 via the contact group 17. The SDI is connected to the S2 terminal of the flash microcomputer 108 via the contact group 17. SCHG is connected to the S3 terminal of the flash microcomputer 108 via the contact group 17.

  Next, the circuit configuration of the strobe (including the strobe control unit 203 and the light emitting units 205A and 205B) will be described.

  Reference numeral 101 denotes a battery serving as a power source of the strobe. Reference numeral 102 denotes a strobe power supply circuit, and an output voltage from the strobe power supply circuit 102 is supplied to each circuit described later. For example, the power supply circuit 102 boosts the voltage of the battery 101 and accumulates electric charge in a main capacitor (not shown) until the voltage reaches a set voltage. This output is supplied to a first light emitting circuit 113 and a second light emitting circuit 120 described later. Reference numeral 103 denotes a DC / DC converter, which is supplied to a strobe microcomputer 108 as a constant voltage circuit that outputs a constant voltage even when the voltage of the battery 101 changes.

  A switch unit 104 includes a switch detection circuit 105 and a switch group 106. The switch detection circuit 105 detects the on / off state of each of the switches constituting the switch group 106, and outputs this detection signal to the flash microcomputer 108. Here, the switch group 106 includes a light emission amount setting switch for setting the amount of strobe light emission in the light emitting units 205A and 205B, a strobe mode setting switch, and other switches for controlling strobe light emission.

  Reference numeral 107 denotes an EEPROM (ROM capable of electrically erasing and rewriting data) connected to the flash microcomputer 108. In the EEPROM 107, setting information necessary for the flash emission operation is written. For example, the EEPROM 7 can store irradiation range data of strobe light in the light emitting units 205A and 205B.

  Reference numeral 108 denotes a flash microcomputer (including an irradiation range calculation unit, a determination unit, a correction amount calculation unit, and a warning unit described in the claims of the present application). The flash microcomputer 108 has a one-chip IC circuit configuration with a built-in microcomputer including a CPU, a ROM, a RAM, an input / output control circuit (I / O CONTROL), a multiplexer, a timer circuit, and the like. The flash microcomputer 108 can control the flash and the camera system by software. In the present invention, an integrated value table and the like used for limiting light emission during continuous light emission described later are stored. Note that the flash microcomputer 108 may include the EEPROM 107.

  Reference numeral 113A denotes a first light emitting circuit housed in the light emitting unit 205A. The first light emitting circuit 113A discharges the charge stored in the strobe power supply circuit 102 into the first flash discharge tube 114A by receiving a command from the strobe microcomputer 108. Or to interrupt this discharge. A first flash discharge tube 114A is connected to the first light emitting circuit 113A and irradiates a subject.

  A first monitor circuit 115A monitors the amount of light emitted from the first flash discharge tube 114A, and can control the amount of light emission by monitoring the amount of light emitted during preliminary light emission and main light emission.

  Reference numeral 113B denotes a second light-emitting circuit housed in the light-emitting unit 205B. The second light-emitting circuit 113B discharges the charge stored by the strobe power supply circuit 102 into the second flash discharge tube 114B upon receiving a command from the strobe microcomputer 108. Or to interrupt this discharge. A flash discharge tube 114B is connected to the second light emitting circuit 113B by a second flash discharge tube and irradiates an object.

  Reference numeral 115B denotes a second monitor circuit that monitors the light amount of the second flash discharge tube 114B, and can control the light emission amount by monitoring the light emission amount in the preliminary light emission or the main light emission.

  A display unit 123 includes a liquid crystal display (LCD) 124 and a liquid crystal display circuit 125. The LCD 124 displays information related to flash photography. This LCD 124 can be provided on the exterior of the flash control unit 203. Note that, as a display element for displaying information related to flash photography, not only an LCD but also a TFT or the like may be used. The liquid crystal display circuit 125 causes the LCD 124 to display information on flash photography in accordance with a command from the flash microcomputer 108.

  On the camera body 200 side, first, the battery 1 is connected, and when a main switch (not shown) which is one of the switch groups 6 is turned on, the power supply circuit 2 and the DC / DC converter 3 are activated. As a result, constant voltages are generated in the power supply circuit 2 and the DC / DC converter 3, and these constant voltages are supplied to the camera microcomputer 8 and each circuit. When a constant voltage is supplied to the camera microcomputer 8, the CPU in the camera microcomputer 8 performs a reset operation. Specifically, it clears a flag in the program or clears stored contents.

  Also, on the strobe side, when the battery 101 is connected and a main switch (not shown), which is one of the switch groups 106, is turned on, a constant voltage is generated by the strobe power supply circuit 102 and the DC / DC converter 103. These constant voltages are supplied to the flash microcomputer 108 and each circuit. When a constant voltage is supplied to the flash microcomputer 108, a reset operation is performed in the CPU in the flash microcomputer 108. Specifically, it clears a flag in the program or clears the contents stored in the memory.

  Here, a description will be given of the limitation of flash light emission, which is a premise of the present invention. At the time of continuous light emission of the strobe, problems such as melting of the light emitting part due to heat generation, damage of internal parts, and rise in the outer temperature have occurred. In order to prevent this problem, when light is emitted within a certain period of time, an integrated value according to the amount of emitted light is added, and a time limit is provided for the light emission interval according to the total of the integrated values. In the present invention, the integrated value shown in FIG. 4 is used. When the light emission amount is 1/1, 128 is added, and as the light amount decreases, the integrated value decreases. FIG. 5A shows the relationship between the sum of the integrated values and the time limit from the emission to the next emission stored in the flash microcomputer 108 of the first embodiment. Until the total integrated value is less than 1280, that is, the time limit from one light emission to the next light emission is 1 second until the light emission amount is 1/1, the time limit is 1 second. After that, when the light emission is repeated, the time limit increases in accordance with the integrated value. (FIG. 6) When the integrated value becomes 6144 or more, the strobe device displays a temperature rise warning as shown in FIG. Generally, when a warning message appears, it is recommended to pause for a certain period of time. Therefore, according to the present invention, a method for maximizing the number of times of light emission until a warning is displayed is calculated and notified to the user.

  Hereinafter, with reference to FIG. 1, a method of maximizing the number of times of light emission until a temperature rise warning which is a predetermined light emission limit when a plurality of light emitting units have different light emission amounts according to the first embodiment of the present invention will be notified. The operation will be described.

  In S101, when the power switch (not shown in FIG. 3) is turned on and the camera microcomputer 8 of the camera 200 becomes operable, the camera microcomputer 8 initializes its own memory and ports. Further, it reads the state of the switch input from the input unit 4 and preset input information, and sets various shooting modes such as how to determine the shutter speed and how to determine the aperture.

  The flash microcomputer 108 checks the setting of the light emission amount, and determines whether the light emission amount of each light emitting unit has the same setting. Here, the flash microcomputer 108 previously stores a table of the light emission amount and the integrated value shown in FIG. 5A and a table of the integrated value total and the time limit shown in FIG. 5B. When the light emission amounts of the respective light emitting units are different, the process proceeds to S102. Here, as an example, the description will be given on the assumption that the light emission amount of the light emitting unit 205A is 1/1 and the light emission amount of the light emitting unit 205B is 1/2.

  In S102, the flash microcomputer 108 calculates a light emission amount replacement timing for maximizing the number of times of light emission until the temperature rise warning. Specifically, it can be calculated by dividing the integrated value at the timing of the temperature rise warning by the sum of the integrated values corresponding to the set light emission amounts of the respective light emitting units.

(Number of flashes to be replaced) = (Total integrated value indicating a temperature rise warning) / ((Integrated value corresponding to light emitting amount of light emitting unit 205A) + (Integrated value corresponding to light emitting amount of light emitting unit 205B))
In this embodiment, since the light emission amount of the light emitting unit 205A is 1/1 and the light emission amount of the light emitting unit 205B is 1/2, the integrated value is 128 for the light emitting unit 205A and 64 for the light emitting unit 205B. Since the total integrated value for displaying the temperature rise warning is 6144, it is calculated 32 times by applying the above equation.

  In S103, the flash microcomputer 108 displays the light emission amount replacement timing calculated in S102 on the display unit 123. Here, in addition to the light emission amount switching timing, the number of light emission until the temperature rise warning display when the light emission amount is not replaced and the number of light emission when the light emission amount is replaced may be displayed together. In the present embodiment, 32 times, which is the calculation result in S102, is displayed as "please change the light emission amount and layout in 32 times". The light emission amount and the increase amount in comparison with the case where the layout is not exchanged may be displayed together with “+16 times” (FIG. 8).

  In step S104, the flash microcomputer 108 receives a light emission instruction from the camera, performs a light emission operation, adds an integrated value according to the light emission amount, and limits the light emission interval with a light emission restriction time corresponding to the total integrated value. Specifically, the light emission amount of the light emitting unit 205A and the light emission unit 205B and the time limit corresponding to the integrated value are respectively calculated, the calculated results are compared, and the light emission interval is controlled with a large time limit. FIG. 5B shows the light emission amount and the time limit for the total integrated value. Here, in the present embodiment, the light emission amount of the light emitting unit 205A is 1/1, and the total integrated value is 0, so that 1 second is obtained. Seconds and 0.5 seconds are compared, and a limit is applied with a large one second. When the flash operation is performed, the flash microcomputer 108 adds the integrated value corresponding to the light emission amount to the total integrated value.

  In S105, the flash microcomputer 108 determines whether or not it is the light emission amount replacement timing calculated in S102. Specifically, the total of the integrated value of the light emission amount replacement timing calculated in S102 is compared with the current total of the integrated values, and it is determined whether the light emission amount replacement timing has been reached. If it is determined that the light emission amount replacement timing has been reached, the process proceeds to S106. If the light emission amount replacement timing has not been reached, the process returns to S104 and the light emission operation is repeated. In this embodiment, a value obtained by adding the sum of the integrated values of the light emitting units 205A and 205B is compared with 6144 which is the sum of the integrated values of the light emission amount replacement timing. If the sum of the integrated values of the light emitting units 205A and 205B is 6144 or more, the process proceeds to S106. Here, when the sum of the sum of the integrated values of the light emitting units 205A and 205B is 6144, the sum of the integrated values of the light emitting unit 205A is 4096 and the sum of the integrated values of the light emitting unit 205B is 2048. The time limit is 3 seconds for the light-emitting unit 205A and 1 second for the light-emitting unit 205B from FIG.

  In step S <b> 106, the flash microcomputer 108 displays a message such as “Please change the light emission amount and layout” on the display 123 to notify that the light emission amount is to be replaced. A display example is shown in FIG. 9A. Here, in addition to notifying the light emission amount replacement timing, a display such as "Light emission amount replacement timing. Do you want to replace the light emission amount setting?" After the display for asking the user for an answer, if “Yes”, the flash microcomputer 108 may exchange the light emission amount settings of the light emitting units 205A and 205B. (FIG. 9B) In this case, after replacing the light emission amount, the flash microcomputer 108 may display a message such as “Please change the layout” on the display 123 to urge the user to change the layout.

  In S107, the flash microcomputer 108 determines whether or not the setting of the light emission amount has been changed. If the setting of the light emission amount has been changed, the process proceeds to S108. In the present embodiment, it is assumed that the setting of the light emission amount has been changed from 1/1 to 1/2 for the light emitting unit 205A, and from 1/2 to 1/1 for the light emitting unit 205B.

  In S108, the flash microcomputer 108 calculates a time limit for each light emitting unit based on the changed light emission amount and the sum of the integrated values. In the present embodiment, at the time of the light emission amount replacement timing, the total integrated value of the light emitting unit 205A and the light emitting unit 205B is 4096 for the light emitting unit 205A and 2048 for the light emitting unit 205B as described above. Therefore, the light emitting unit 205A whose light emission amount has been changed to 1/2 from FIG. 5B has a time limit of 1.5 seconds, and the light emitting unit 205B whose light emission amount has been changed to 1/1 has a time limit of 2 seconds, which is a long time limit of 2 seconds. The flash microcomputer 108 limits the light emission. At this time, in S105 before the light emission amount was changed, the light emission was restricted in 3 seconds, so the change in the light emission amount shortened the time limit.

  In step S109, the flash microcomputer 108 repeats the light emission operation according to the instruction from the camera microcomputer 8 until a temperature rise warning is issued, and the process ends. In this embodiment, the light emitting units 205A and 205B simultaneously reach the sum of the integrated values at which the temperature rise warning is displayed after the light emission amount is switched and the light emission is performed 32 times. This means that light emission was performed 64 times at the desired light amount setting in total. When the light emission amount is not changed, the total of the integrated values at which the temperature rise warning is displayed is displayed 48 times in the light emitting unit 205A with the light emission amount 1/1, and the warning display is displayed in the light emitting unit 205B with the light emission amount 1/2. A temperature rise warning is displayed at half the total value. According to the present invention, the flash microcomputer 108 notifies the user of the light emission amount replacement timing, and the light emission amount is replaced on the way, whereby the number of light emission until the temperature rise warning is increased 16 times. FIG. 10A shows the increase amount (number of times) of the light emission amount in combination with each light emission amount, and FIG. 10B shows the increase amount (ratio). The light emission amount is increased by 30% at one step difference, increased by 60% at two step difference, and the number of times of light emission is approximately doubled at the maximum.

  As described above, in the present invention, in the case of a strobe having a plurality of light emitting units, when the light emitting amounts are continuously emitted with different settings, the integrated value of the light emitting amount of each light emitting unit and the integrated value for displaying the temperature rise warning are displayed. The timing of changing the light emission amount is calculated from the total and the user is notified. The user can maximize the number of times of light emission until the temperature rise warning is displayed by changing the light emission amount and the layout at the timing notified by the strobe device.

  Hereinafter, with reference to FIG. 11, a method of maximizing the number of times of light emission until a temperature rise warning which is a predetermined light emission limit when a plurality of light emitting units have different light emission amounts according to the second embodiment of the present invention will be notified. The operation will be described.

  The difference from the first embodiment is that when the difference in the light emission amount is equal to or less than a predetermined value, the number of light emission until the light emission limit and the replacement timing are not calculated, and when the increase amount of the light emission number is equal to or less than the predetermined value, the calculation result is not displayed. It is. The flowchart is different from FIG. 1 only in that steps S1011 and S1021 are added, and all other steps are the same. The flash microcomputer 108 previously stores a predetermined value of the difference in the amount of light emission used for the determination in S1011 and a predetermined value of the increase amount of the number of times of light emission used for the determination in S1021. In this embodiment, for example, the predetermined value of the difference in the light emission amount is one step, and the predetermined value of the increase amount of the number of light emission is 20 times.

  In step S1011, the flash microcomputer 108 determines whether the difference between the light emission amounts of the light emitting units 205A and 205B is one or more. Here, the initial light emission amounts of the light emitting units 205A and 205B are set to 1/1 and 1/2, respectively. (Same as in the first embodiment.) Since there is a light emission amount difference of one or more steps, the process proceeds to S102. If there is no difference of one or more stages, the process ends.

  In step S1021, the flash microcomputer 108 determines whether the increase in the number of times of light emission calculated in step S102 is equal to or greater than a predetermined value. Here, since it is the same as the first embodiment, the increment of the number of times of light emission is 16 times. Since the predetermined value of the increase amount of the number of times of light emission is set to 20 times, since it is 20 times or less, the process is terminated. Here, if the number is equal to or more than 20, the process proceeds to S103, and the calculation result is displayed.

  As described above, by providing the predetermined value of the difference between the light emission amounts and the predetermined value of the increase amount of the number of light emission times, it is possible to prevent the layout and the instruction of the replacement of the light emission amount from being displayed even though the number of increase times is small. I can do it.

  As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist.

203 strobe device, 108 strobe microcomputer, 205A, 205B light emitting unit,
123 Display

Claims (7)

A plurality of light emitting units each capable of setting a light emission amount, and an integrated value according to the light emission amount when emitting light continuously, and according to the total integrated value that is the sum of the added integrated values and the light emission amount. A strobe device having a control unit for performing light emission restriction by using a display unit,
When a plurality of light emitting units are set to different light emitting amounts, the light emitting unit includes a light emitting amount replacement timing calculating unit that calculates a timing of switching the setting of the light emitting amount in order to maximize the number of times of light emitting until a predetermined light emitting limit is applied. A strobe device having a plurality of light-emitting units, which notifies a user of a calculation result of a replacement timing.   2. The flash device according to claim 1, wherein the predetermined light emission restriction is a light emission restriction accompanied by a temperature rise warning.   2. The flash device according to claim 1, wherein the calculation result to be notified to the user is the number of times of light emission at the time of changing the amount of light emission, and an increase amount of the number of times of light emission as compared with a case where the setting of the amount of light emission is not changed.   2. The method according to claim 1, wherein when the number of times of light emission reaches the light emission amount replacement timing, a display for replacing the light emission amount or visiting the user is displayed on the display unit, and the setting of the light emission is changed according to the answer of the user. Strobe device.   2. The flash device according to claim 1, wherein a replacement instruction is not issued when a difference between light emission amounts or an increase amount of the number of light emission times as a calculation result is less than a predetermined value.   2. The flash device according to claim 1, wherein the method of calculating the light emission amount replacement timing is a method of dividing a total integrated value for performing a predetermined light emission restriction by a sum of light emission amount settings of a plurality of light emitting units. A plurality of light emitting units each capable of setting a light emission amount, and an integrated value according to the light emission amount when emitting light continuously, and according to the total integrated value that is the sum of the added integrated values and the light emission amount. A control method for a strobe device, comprising: a control unit configured to perform light emission restriction by using a display unit; and
When a plurality of light emitting units are set to different light emitting amounts, the light emitting unit includes a light emitting amount replacement timing calculating unit that calculates a timing of changing the light emitting amount setting in order to maximize the number of light emitting times before the light emitting limit is applied, and a light emitting amount replacing timing. A method for controlling a strobe device having a plurality of light-emitting units, wherein the result of calculation is notified to a user.