JPH01244436A - Camera incorporated with red-eye preventing device - Google Patents

Abstract

PURPOSE:To save trouble of switch-changeover and to prevent the occurrence of red-eye, which is caused by missing of operation, by forcibly operating a light emitting device for preventing red-eye phenomenon in a self-timer mode set when instructions to operate a main flash device are given. CONSTITUTION:When a semi-push switch SW 1 is turned on, a range finding circuit 2 and a metering circuit 3 in a CPU 1 read in information on the range- finding and brightness, and the CPU 1 calculates the lens driving amount and an exposure amount for focusing. According to the brightness information, whether or not a light emitting tube 8a carries out main light emission is decided, and if the brightness information is less than a prescribed value, a forcible light emission mode is set. A self-timer switch SW 5 is decided to be turned on or off, and the self-timer mode is set. The charging of a main capacitor 8b starts through a charging circuit 8d, and simultaneously a red-eye prevention mode is set. With a switch SW 2 turned on, instructions to prevent red-dye are given to a light emitting circuit 8e, and the light emitting tube 8a preliminarily emits light with the aid of electric charges from a sub-capacitor 8c, then a shutter is driven. Simultaneously, the light emitting tube 8a carries out main light emission.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a camera incorporating a red-eye prevention device for preventing red-eye phenomenon during flash photography.

B. Prior Art The red-eye phenomenon refers to a phenomenon in which human eyes appear to glow red or gold when photographing in color using an electronic flash device. This phenomenon occurs when the flash of light from the light emitting unit of an electronic flash device passes through the pupil of the eye and is reflected by the retina, and the reflected light is captured on film. There are many capillaries in the retina of the eye, and the hemoglobin in the blood is red, so the reflected light appears reddish.

It has been empirically found that the red phenomenon appears conspicuously in photographs under the following conditions.

1) When the photographing environment is dark The size of the pupil of the human eye changes depending on the surrounding brightness, and when it is dark, the diameter expands to about 7 to 8 mm. At this time, since the amount of light incident on the eye and the amount of reflected light increase, the red-eye phenomenon is naturally more noticeable.

2) When the distance between the light emitting part of the electronic flash device and the optical axis of the photographing lens is short, the retina of the eye has a fairly high reflectance and also has high reflection directionality. Therefore, if the light emitting part of the electronic flash device and the optical axis of the photographing lens are close to each other, and there are three elements (light emitting part, photographing lens, and eye) in a positional relationship where the light regularly reflected by the retina easily enters the photographing lens, red-eye occurs strongly. That is, when the angle at which the photographic lens and the light emitting part of the flash light source are viewed by the eyes of the person who is the subject is less than a certain small angle, red eye always occurs. Empirically, this angle is approximately 2-2.5 degrees. Therefore, red-eye can be prevented by moving the light emitting part of the electronic flash device away from the optical axis of the photographic lens, but there is a limit depending on the distance from the camera to the subject (hereinafter referred to as subject distance), and the subject distance is greater than a predetermined value. It is difficult to avoid red eyes.

Therefore, techniques for preventing the red-eye phenomenon have been known for some time. For example, rpsa JOURNA-LJ's 195
The July 2020 issue discloses a method to prevent red eye by letting your eyes get used to a bright environment before taking a photo, and then firing the flash while your pupils are shrunk to 3mm or less. Furthermore, in Japanese Patent Publication No. 58-4.8088, pre-irradiation is performed using a pre-irradiation lamp for the time necessary for the pupil to close before photographing, and when the pupil has reached almost its minimum diameter, an electronic flash is used. 2. Description of the Related Art A technique is disclosed in which a light emitting section of a device emits light to take a photograph. Furthermore, in Japanese Patent Publication No. 58-9130, two flash discharge tubes are provided, and after one discharge tube emits a pre-flash to close the pupil, the second discharge tube emits the main light to perform the actual photographing. A method is disclosed.

C9 Problems to be Solved by the Invention Incidentally, there are known cameras capable of so-called self-timer photography in which a predetermined period of time is measured when the release button is fully pressed, and a shirt release is performed after the timing is finished. Since such self-timer photography usually involves photographing people, there is an extremely high possibility that red-eye will occur when using a flash device.

Therefore, with a camera that is capable of self-timer shooting and has a built-in light emitting device for red-eye prevention, when taking self-timer shooting, it is necessary to switch to mode L, which performs pre-irradiation to prevent red-eye, using an operation button, etc., which is a hassle. In addition to this, there is a risk of forgetting the operation, and if you forget, a photo with red eye will be taken.

SUMMARY OF THE INVENTION An object of the present invention is to provide a camera with a built-in red-eye prevention device that always performs pre-irradiation to prevent red-eye during flash photography using a self-timer, saves the trouble of switching switches, and prevents the occurrence of red-eye due to forgetting to operate the camera. It is in.

Means for Solving Problem D1 To explain with reference to FIG. 1-(a) which is a diagram corresponding to the claim, the camera with a built-in red-eye prevention device according to the invention of claim 1 has a main flash that emits illumination light for object illumination. device〕-O'',
A main flash operation command means 102 outputs a main flash operation command for activating the main flash device 1.01, and a main flash operation command means 102 that outputs a main flash operation command for operating the main flash device 1.01, and irradiates light that shrinks the human pupil toward the subject prior to activation of the flash prior [101]. a red-eye prevention light emitting device 103;
A self-timer operation means 105 outputs a self-timer mode setting signal for setting the self-timer mode by manual operation, and when setting the self-timer mode, it measures a predetermined time according to the release operation, and releases the shirt release after the timing is finished. Self-timer means for performing]0
4, when there is no main flash activation command even if the self-timer mode is set, the output of the red-eye prevention activation command for activating the red-eye prevention light emitting device 103 is prohibited;
The control means 106 outputs a red-eye prevention operation command when the self-timer mode is set and there is a main flash operation command.

To explain with reference to FIG. 1(b), which is a diagram corresponding to the I-nome, the camera with a built-in red-eye prevention device according to the invention of claim 2 includes a main flash device]01 that emits illumination light for illuminating a subject, and this main flash light. A main flash operation command means 1.02 outputs a main flash operation command for operating the device]-01, and a main flash operation command means 1.02 that can be switched between an on position and an off position by manual operation, and when in the on position, a red () A red-eye prevention switch 201 outputs a red-eye prevention mode setting signal for setting the prevention mode.
When the main flash activation command is output when the red-eye prevention mode is set, the red-eye prevention light-emitting device tLO3 emits light that shrinks the human pupil toward the subject prior to activation of the main flash device 101, and the red-eye prevention light emitting device tLO3 is activated by manual operation. A self-timer switch 202 is switchable between an on position and an off position, and outputs a self-timer mode setting signal to set the self-timer mode when in the on position, and when the self-timer mode is set, it responds to the release operation. and a self-timer means 104 that measures a predetermined time using a self-timer and releases the shutter after the time is finished, and is configured such that when the self-timer switch 202 is turned to the on position, the red-eye prevention switch 201 is also turned to the on position. do.

80 Effect (1) Even if the self-timer mode is set, the invention control means 106 of claim 1 prohibits the output of the red-eye prevention operation command if there is no main flash operation command from the main flash operation command means 102. However, if the self-timer mode is set and there is a main flash activation command, a red-eye prevention activation command is output. As a result, pre-irradiation for red-eye prevention is performed without operating the red-eye prevention operation member during self-timer photography, which saves time and effort, and avoids the occurrence of red-eye due to forgetting to operate.

-8= (2) Invention of Claim 2 When the self-timer switch 202 that outputs the self-timer mote setting signal is switched to the on position,
The red-eye prevention switch, which outputs the red-eye prevention mode setting signal, is also configured to be always switched to the on position, so as mentioned above, pre-irradiation for red-eye prevention is always performed during self-timer shooting, avoiding red-eye occurrence due to forgetting to operate it. can.

F. Embodiment 1 First Embodiment A first embodiment of the present invention will be described based on FIGS. 2 and 3.

In FIG. 2 showing the overall configuration, a CPU 1 includes a distance measuring circuit 2. Photometric circuit 3. Exposure control circuit 4. A motor drive circuit 5 and switches SWI and SW2 are connected. The distance measurement circuit 2 outputs distance measurement information corresponding to the distance to the subject, and the photometry circuit 3 outputs brightness information regarding the brightness of the subject.

A focusing motor 6 is connected to the motor drive circuit 5, and a focusing lens (not shown) is driven by the motor 6 in response to a lens movement signal from the CPU to perform focusing. An exposure control device 7 such as a shutter or an aperture is connected to the exposure control circuit 4, and the exposure control device 7 is driven based on the exposure value calculated by the CP TJ 1 to perform photographing.

Switch SW1. SW2 is a switch that is turned on in conjunction with the operation of a release button (not shown); switch SW1 is turned on when the release button is pressed halfway, and switch SW2 is turned on when the release button is pressed fully. When the switch SWI is turned on, the CPU 1 turns on the distance measuring circuit 2. The photometric circuit 3 is activated and the motor drive circuit 5 is turned on by turning on the switch SW2. The exposure control circuit 4 is activated.

The CPU also includes an electronic flash device 8. which also serves as a pre-irradiation device to prevent red eyes. Timing circuit 9 and switch SW3~
SW5 is connected. The electronic flash device 8 includes an arc tube 8
a, main and sub capacitors 8b and 8c that store charged charges for light emission of this arc tube 8a, a charging circuit 8d that charges these capacitors 8b and 8c, and a light emitting circuit 8e that controls the start of light emission of the arc tube 8a. and has. The main capacitor 8b is connected to the arc tube 8a along with the shirt release.
Charges are stored in the sub-capacitor 8c for main light emission, which emits illumination light for object illumination, and the sub-capacitor 8c is used for pre-emission light, which emits light that shrinks the human pupil from the arc tube 8a prior to the main light emission. A charging charge for this purpose is stored. The charging circuit 8d charges the main and sub capacitors 8b and 8c, respectively, according to a command from the CPU i, and outputs a respective charging completion signal after charging is completed. The light emitting circuit 8e causes the arc tube 8a to emit main light in response to a main light emission start signal from the CPUI, and stops the main light emission in response to a main light emission stop signal. Also, CPUI
In response to the pre-flash start signal from the arc tube 8a, the arc tube 8a is caused to emit a flash light, and in response to the pre-flash stop signal, the flash light is stopped.
Let it be.

The switch SW3 is a momentary type switch that is linked to the suppression operation of a flash selection button (not shown), and by sequentially turning on the switch, the CPU switches between automatic flash mode → forced flash mode → flash prohibition mode. Configure settings. Here, what is automatic flash mode?
This is a mode in which the necessity of main light emission is determined based on brightness information from the photometry circuit 3, and for example, main light emission is performed at low brightness to perform flash photography. The forced light emission mode is a mode in which main light emission is performed regardless of subject brightness to perform flash photography. Furthermore, the light emission prohibition mode is a mode in which normal photography is performed without performing main light emission even at low brightness. And when the brightness is low in automatic flash mode,
Alternatively, when the forced flash mode is set, the capacitor 8b is charged to enable flash photography, and a flash start signal (main flash) is sent to perform the main flash using the charge in the main capacitor 8b upon shirt release. A flash operation command) is output to the light emitting circuit 8e.

The switch SW4 is a switch that is linked to the suppression operation of a red-eye prevention button (not shown), and outputs a red-eye prevention mode setting signal when turned on.

The CPU sets the red-eye prevention mode using this red-eye prevention mode setting signal, and charges the sub-capacitor 8c via the charging circuit 8d. When the full-press switch SW2 is turned on, a red-eye prevention activation command is output to the light emitting circuit 8e, and the flash tube 8a is caused to emit light by the charge in the sub-capacitor 8c prior to main light emission at the time of shirt release. In other words, flash light emission is performed. Further, when the switch S V,'4 is turned off, the red-eye prevention mode is canceled and the above-mentioned brilliance light emission is not performed.

The switch SW5 is a switch that is turned on in conjunction with the operation of a self-timer (not shown), and when turned on, outputs a self-timer mode setting signal. CPUl
- sets the self-timer mode based on this self-timer mode setting signal, outputs a self-timer command signal to the timing circuit 9 when the fully pressed switch SW2 is turned on, opens the clock for a predetermined time, and ends the timing. Afterwards, perform the shirt tallerise.

In addition, when this self-timer mode is set, if the conditions for performing flash photography such as "double flash photography" are met, the light emitting circuit 8e will be activated to prevent red eye regardless of whether the red eye prevention switch SW4 is on or off. Outputs the mote setting signal.

In the configuration of the above embodiment, the arc tube 8a, the main capacitor 8b, the charging circuit 8d, and the light emitting circuit 8e operate the main flash device 11101, the switch SW3 controls the main flash operation command means 102, the arc tube 8a, the sub-capacitor 8c, the charging The circuit 8d and the light emitting circuit 8e are the red eye prevention light emitting device 103
, the clock circuit 9 and the CPU are self-timer means 1.
-04, switch SW5 is the self-timer operating means 1
05 and CPU] constitute the control means 106, respectively.

Next, the operation of the embodiment will be explained with reference to the flowchart (-) in FIG.

When the half-press switch 5Wi (Fig. 2) is turned on, CI)
U ] reads the distance measurement information and brightness information from the distance measurement circuit 2 and the photometry circuit 3, respectively, calculates the lens drive amount for driving the photographing lens (not shown) to the focusing position based on the distance measurement information, and , calculates the exposure value based on the brightness information.

Furthermore, in step S1 of FIG. 3, a mote related to flash photography is determined. If it is determined that the above-mentioned automatic light emission mode is selected, it is determined in step S2 whether or not the main light emission of the arc tube 8a is to be performed based on the luminance information. This is determined based on whether the brightness information is higher than a predetermined value,
If the brightness information is lower than a predetermined value and main light emission is necessary, step S2 is affirmed, and if the brightness information is higher than the predetermined value and main light emission is unnecessary, step S2 is negative. Further, when the forced light emission mode is set, the process proceeds to step S3, and when the light emission prohibition mode is set, the process proceeds to step S7.

If step S2 is negative, the process proceeds to step S7, where it is determined whether the self-timer switch SW5 is on. If step S7 is affirmed, a self-timer mode is set in step S8.

On the other hand, if step S2 is affirmed, a flash flag is set in step S3, charging of the main capacitor 8b is started via the charging circuit 8d, and the process proceeds to step S4. In step S4, it is determined whether the self-timer switch SW5 is on. If a negative determination is made, the process proceeds to step S9, where it is determined whether the red eye prevention switch SW4 is on. If step S9 is affirmative, the red-eye prevention mode is set in step S6, and if negative, the red-eye prevention mode is not set and the process proceeds to the next step.

Further, if step S4 is affirmed, the self-timer mode is set in step S5, and the red-eye prevention mode is set in step S6, and the process proceeds to the next step.

Thereafter, when the full-press switch SW2 is turned on, the CPU drives the focusing lens (not shown) to the focusing position using the motor 6 via the motor drive circuit 5, and also controls exposure control members such as the shutter and the aperture via the exposure control circuit 4. 7 to take a picture. At this time, if the above-mentioned main flash flag is set, a light emission start signal is output to the light emitting circuit 8e as the shutter is driven, and the charge in the main capacitor 81) causes the light emitting tube 8a to emit main light. If the red-eye prevention mode is set at this time, a red-eye prevention activation command is output to the light emitting circuit 8e as the switch SW2 is turned on, and the sub-capacitor 8c
First, the arc tube 8a is caused to pre-emit light by the charged charge, and after a predetermined time (for example, 0.75 seconds), the shutter is driven and the arc tube 8a is caused to emit main light. This prevents red eye.

Further, when the flash flag is set to 1~ and the self-timer mode is set, when the switch SW2 is turned on, a self-timer operation command is first output to cause the timer circuit 9 to time a predetermined time. As shown in FIG. 3, under flash photography conditions, the red-eye prevention mode is always set when the self-timer mode is set, so when the timer ends, the arc tube 8a is pre-flashed as described above, and the shutter is released after a predetermined time. At the same time, the arc tube 8a is caused to emit main light.

As described above, when the self-timer mode is set under flash photography conditions, the red-eye prevention mode is set regardless of whether the red-eye switch SW4 is on or off. Normally, when shooting with a self-timer, the subject is a person, so it is often necessary to prevent red-eye when shooting with a flashlight. According to Section 1-1, it is possible to save the trouble of operating the operating members in such cases, and to avoid forgetting to operate them. This prevents red-eye from occurring.

-Second Embodiment- A second embodiment of the present invention will be described based on FIGS. 4 and 5. Note that in FIG. 5, the same parts as in FIG. 2 are given the same reference numerals.

FIG. 4 is a perspective view showing the configuration of a self-timer switch and a red-eye prevention switch. The operating member 51, which is provided to slightly protrude from the camera cover 53, is movable in the direction shown in the drawing. An arrow 5 ]-a is provided on the upper surface of the operating member 51, and brushes 52a and 52b are provided at the lower part of the operating member 51.

52c is integrally attached.

On the upper surface of the resin 1 to printed circuit board 54 fixed inside the camera, a pattern 55 is arranged so as to be in constant contact with the brush 52a, and patterns 56 and 57 are arranged so as to be in contact with the brushes 52b and 52c, respectively. There is. The pattern 55 is grounded, and the brush 52b
When the pattern 56 comes into contact with the pattern 56, the pattern 55 and the pattern 56 are electrically connected through the brushes 52a and 52b, and as a result, the red-eye prevention mode setting signal input terminal of the CPU 70 (FIG. 5) becomes low level, and the CPU 70 becomes red-eye. Recognizes the output of the prevention mode setting signal. Further, when the brush 52c comes into contact with the pattern 57, the pattern 55 and the pattern 57 are connected through the brushes 52a and 52c.
The self-timer mode setting signal input terminal of the PU 70 becomes low level, and the CI) U 70 recognizes the output of the self-timer mode setting signal. At this time, the pattern 56 is still grounded via the pattern 55,
The CPU 70 also recognizes the red-eye prevention mode setting signal at the same time.

Also, on the second side of the camera cover 53, there are scales 5 at three locations.
3a, 53b, 53c are provided, and these scales 53
a ~ 53 along c rOFFl, r red eye ○N”, “
Self ONJ characters are printed on each. arrow 5
1a is the scale 53a, 53b.

When each of the operating members 51 is operated to a position indicating 53c, a click feeling is provided by a mechanism (not shown). When the arrow 51a points to the scale 53b, the brush 52b and the pattern 56 come into contact, and the arrow 51
When a indicates the scale 53c, the brush 52c and the pattern 57 come into contact.

The configuration of the above embodiment and the configuration of claim 2 have the following correspondence.

Pattern 55. Brush 52a and pattern 56, brush 52b controls red-eye prevention switch 201, pattern 55.
The brush 52a and the pattern 57° brush 52c constitute a self-timer switch 202, respectively. Also,
The positions where the patterns 56 and 57 are in contact with the brushes 52b and 52c correspond to the on position, and the positions where they are not in contact correspond to the off position.

Next, the operation of this embodiment will be explained.

Now, for example, under the flash photography conditions described above, the arrow 51
When a indicates the scale 53a, the brush 52a comes into contact with the pattern 55 which is at ground potential, and the brush 52b
Neither of the brushes 52c and 52c are in contact with the patterns 56, 57. Therefore, the CPU 70 recognizes that neither the red-eye prevention mode nor the self-timer mode is in effect since each mode setting signal input terminal is at a high level as described above.

Next, when the operating member 51 is operated so that the arrow 51a points to the scale 53b, the brush 52a comes into contact with the pattern 55 and the brush 52b comes into contact with the pattern 56.

Therefore, the patterns 55 and 56 are similar to the brush 52.
The CPU 70 recognizes the red-eye prevention mode setting signal and sets the red-eye prevention mode.

As a result, under flash photography conditions, full-press switch SW2
When the button is turned on, a pre-flash for red eye prevention is performed, and after a predetermined period of time, a shirt release accompanied by a main flash is performed. Note that at this time, the brush 52c has a pattern 57.
not in contact with.

Furthermore, by operating the operating member 5], the arrow 51a is set to the scale 53c.
If you instruct the brush 52c and the pattern 57
The patterns 57 and 55 are brought into contact with each other, and the patterns 57 and 55 are thereby electrically connected, and the CPU 70 recognizes the self-timer mode setting signal in a double manner and sets the self-timer mode. At this time, since the brush 52b is also in contact with the pattern 56, the red-eye prevention mode is also set.

When the self-timer mode is set under flash photography conditions as described above, when the release button is fully pressed, the timing circuit 9 measures the time, and after the timing is finished, a pre-flash is performed, and then after a predetermined period of time has elapsed, the timing circuit 9 measures the time. A shutter release accompanied by main light emission is performed.

In order to set the self-timer mode from the state where the operating member 51 is located at the position where the arrow 51a indicates the scale 53a as described above, that is, from the off state where neither the red-eye prevention mode nor the self-timer mode is set, The operating member 51 is moved to the position where the arrow 51a indicates the scale 53c.
- When operated, in addition to contact between the brush 52c used for setting the self-timer mode and the pattern 57, the brush 52b and the pattern 56 used for setting the red-eye prevention mode are brought into contact with each other.
When setting the self-timer mode, the "red l" prevention mode is set, which is necessary when setting the self-timer mode. Therefore, when performing self-timer photography under flash photography conditions, a pre-flash for red-eye prevention is carried out prior to the main flash.

- Third Embodiment - FIGS. 6(a) and 6(b) are configuration diagrams of each switch showing a third embodiment. On the top surface of the camera body 61,
A red-eye prevention switch 62 and a self-timer switch 63 are arranged as shown in the figure so as to protrude slightly, and when these switches 62, 63 are operated, the grooves 61a, 6],
b is movable inside between an on position and an off position. There are two types of arrows 62 on the top of the switches 62 and 63.
a, 62b and 63a, 63b are respectively engraved, and arrows 62b, 63b are respectively engraved with switches 62.6.
3 shows the direction of movement.

In addition, on the two sides of the camera body 61, there are scales 61c and 61d on the edge of #61a, and scales 61θ and 1” on the edge of the groove 61b.
6] f is engraved on each. Furthermore, the scale 61c,
The word "ON" is displayed along the scale 61d and 61f.
The letters rOFFJ are printed along each line.

When the red-eye prevention switch 62 is operated to the position where the arrow 62a indicates the scale 61c (on position), the red-eye prevention mode setting signal is outputted from CPtJ70 (FIG. 5), thereby setting the red-eye prevention mode.

Further, the arrow 63a indicates the scale 61. When the self-timer switch 63 is operated to the position indicating e (on position), a self-timer mode setting signal is input to the CPU 70,
This sets the self-timer mode.

Now, when switching the self-timer switch 63 to the on position from the state where both switches 62 and 63 are in the off position, the red-eye switch 62 is located in the operating direction of the cello timer switch 63 in the state shown in FIG. 6(a). Therefore, operation is impossible. Therefore, first, the red eye prevention switch 62 is operated to the on position to move it away from the operating direction of the self-timer switch 63, and then the self-timer switch 63 is operated to the on position. Thereby, when the self-timer mode is set by turning on the switch 63 during flash photography, it is ensured that the switch 62 is also in the on position and the red-eye prevention mode is set.

First Modified Example 1 Although a slide type switch is shown in FIG. 4, the present invention is not limited to this, and a bush type switch may also be used. In this case, for example, pressing the switch once will output a red-eye prevention mode setting signal, pressing the switch once more will output a self-timer mode setting signal, and
It may be configured such that both actuation commands are canceled when the button is pressed twice.

Furthermore, in the above description, the single arc tube 8a and the charging circuit 8d
Although the main light emission and pre-light emission are performed in the above embodiment, the present invention can also be applied to a camera in which each is provided separately.

Furthermore, the electronic flash device may be externally attached, and the red-eye prevention light emitting device may be built into the electronic flash device main body, or may be built into the camera main body.

Effects of the G1 Invention According to the invention of claim 1-, if the self-timer mode is set to perform self-timer photography while the main flash device activation command is being output, red-eye prevention is forcibly activated. Since the light emitting device is activated, pre-irradiation to prevent red eye is always performed when using the main flash device for self-timer shooting, thereby eliminating the need to operate the red eye prevention operation member. At the same time, it is possible to prevent red eyes from occurring due to forgetting to operate.

According to the second aspect of the invention, when the self-timer switch for setting the self-timer mode is turned on, the red-eye prevention switch for setting the red-eye prevention mode is also turned on, so that the main flash device is not used. When using self-timer photography, pre-irradiation is performed to prevent red-eye, which is necessary to avoid red-eye exposure caused by forgetting to operate the red-eye prevention upper switch.
] is prevented from occurring.

[Brief explanation of the drawing]

Figures (a) and (b) are complaint correspondence diagrams. 2 and 3 show a first embodiment of the present invention, FIG. 2 is a block diagram of the control system, and FIG. 23 is a flowchart 1 showing the processing procedure. 4 and 5 show a second embodiment of the present invention, in which FIG. 4 is a perspective view showing the configuration of a red-eye prevention switch and a self-timer switch, and FIG. 5 is a block diagram of a control system. FIGS. 6(a) and 6(b) show a third embodiment, and are perspective views showing the configuration of a red-eye prevention switch and a self-timer switch. 1: CPU 8: Electronic flash device 8a: Arc tube
8b = Main capacitor 8c: Sub-capacitor 8d: Charging circuit 8e: Light emitting circuit 9: Timing circuit 101-: Main flash device 102: Main flash operation command means 103: Red-eye prevention light emitting device 104: Self-timer means 105: Self-timer operation Means 106: Control means 201: Red-eye prevention switch 202: Self-immersion switch Patent applicant: Nippon Kogaku Kogyo Co., Ltd. Representative patent attorney Fuyuki Nagai

Claims (1)

[Scope of Claims] 1) A main flash device that emits illumination light for object illumination; a main flash operation command means that outputs a main flash operation command for operating the main flash device; A red-eye prevention light emitting device that emits light that constricts human pupils prior to activation, and a self-timer operating means that outputs a self-timer mode setting signal for manually setting the self-timer mode. When the self-timer mode is set, a self-timer means measures a predetermined time in response to a release operation and releases the shutter after the time measurement is completed; and when the main flash activation command is not received even when the self-timer mode is set; prohibiting the output of a red-eye prevention activation command for activating the red-eye prevention light emitting device;
A camera with a built-in red-eye prevention device, comprising: a control means for outputting the red-eye prevention activation command when the self-timer mode is set and the main flash activation command is issued. 2) A main flash device that emits illumination light for object illumination, a main flash operation command means that outputs a main flash operation command to operate this main flash device, and a main flash operation command means that can be switched between an on position and an off position by manual operation. a red-eye prevention switch that outputs a red-eye prevention mode setting signal for setting the red-eye prevention mode when the red-eye prevention mode is set to the ON position; It includes a red-eye prevention light emitting device that emits light that constricts the human pupil toward the subject before the device is activated, and a self-timer that can be switched manually between the on and off positions, and a self-timer when in the on position. a self-timer switch that outputs a self-timer mode setting signal for setting a mode; and a self-timer switch that measures a predetermined time according to a release operation when the self-timer mode is set;
and a self-timer means for releasing the shutter after completion of time measurement, and a built-in red-eye prevention device characterized in that the red-eye prevention switch is also configured to be switched to the on-position whenever the self-timer switch is switched to the on-position. camera.