JP2821215B2 - Camera display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reception display device of a camera, and more particularly, to a reception display device of a camera remotely controlled by a remote control signal from a remote control transmitter.

[Related Art] Conventionally, reception confirmation of a remote control device for remotely controlling a camera has been performed by providing a lamp or an LED on a reception side and lighting or blinking the lamp or LED. For this reason, there is a drawback that the display is difficult to see in a bright surrounding or under sunlight outdoors, and it is not easy to confirm the reception even if the distance is short or long. On the other hand, in order to provide a reception confirmation display on the transmitter side, each of the transmitter and the receiver must have transmission and reception functions, and there is a disadvantage that the size and cost are long. Therefore, when a photographing operation is performed by a remote control signal from the transmission side, a reception confirmation device of a camera which emits a flash of a strobe device as confirmation of reception is disclosed in Japanese Patent Application Laid-Open No. 61-15 / 1986.
No. 6245 discloses this. That is, Japanese Patent Application Laid-Open No. 61-15 / 1986
In No. 6245, when a camera receives a remote control signal from a remote control transmitter, i) when the subject brightness is low, the flash light for shooting is radiated toward the subject, so that reception can be confirmed.

ii) When the subject brightness is high, after the shutter is closed, the electric charge stored in the main capacitor or a separately provided reception confirmation capacitor is fully charged, and a strobe light is emitted, whereby reception confirmation can be performed. I have.

In addition, in order to prevent the so-called red-eye phenomenon in which the subject's eyes appear red when shooting with flash light emission using a strobe, the camera responds to the release signal of the camera and emits a small amount of flash light for contracting the pupil several times immediately before the shutter opens. Japanese Patent Application No. 63-311619 (Japanese Unexamined Patent Application Publication No. Hei.
No. 157733).

[Problems to be Solved by the Invention] However, as the reception confirmation at the time of the above-described remote control photographing, the main capacitor is fully discharged after the shutter is closed to emit a strobe light, or a reception confirmation capacitor provided separately from the main condenser is entirely used. The proposal disclosed in Japanese Patent Application Laid-Open No. 61-156245, which discharges and emits a strobe light, is very easy to see because the strobe light is used, but the charge stored in the main capacitor of the strobe is used for reception display. Since the main capacitor is completely discharged, the main light emission for photographing can be performed only after a lapse of a time for recharging the main capacitor, so that a shutter chance is missed. Further, even if a reception confirmation capacitor is provided separately from the main capacitor, and light emission for reception confirmation is performed by the electric charge stored in the confirmation capacitor, a reception confirmation capacitor for this purpose is required.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a camera that can easily perform main light emission of a strobe while easily confirming reception at the time of remote control photographing without adding extra parts. A receiving display device is provided.

[Means for Solving the Problems] A reception display device for a camera according to the present invention includes a reception unit for receiving a photographing operation signal from a remote control device, and a strobe device capable of controlling normal light emission and flash light emission with a small amount of light emission. A control unit for causing the strobe device to execute a minute light emission upon receiving the photographing operation signal, and a photographing operation control unit for performing a photographing operation after the minute light emission.

[Operation] In the reception display device of this camera, the reception confirmation display is performed by flash light emission of a very small amount of light emission at the time of remote control reception. However, since the energy required for this flash light emission is small,
Subsequently, main emission for photographing can also be performed.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a block diagram of a zoom lens camera to which the present invention is applied. In the figure, a CPU 101 is a microcomputer that controls the overall operation of the camera, and controls sequence of camera operation, AF / AE calculation, A / D conversion, LCD / LED
It is in charge of control and switch input control. That is, the CPU 101 includes various switches listed in the switch operation unit 115, for example, the first release switch “1R”,
2nd release switch “2R”, zoom operation switch “Z-
UP "," Z-DOWN ", spot metering switch" SPOT ", strobe mode switch" FLASH ", self-timer switch" SELF ", power switch" POWER ", CPU reset switch" RST ", forced rewind The switch “REWIND”, the back cover switch “BK”, the lens initial position detection switch “AF”, the exposure trigger switch “AF”, etc. are loaded into the CPU at the required timing, and the various information obtained is acquired. LCD
The data is transmitted to the panel 116 and displayed on the panel. In addition, the date data is sent to the data back unit 117, the shooting date is printed on the film, the DX code is read from the film, and AE calculation is performed based on the photometric information from the split-type SPD 105 to control the exposure. I do. Further, a charge signal is given to the strobe unit 118 to start strobe charging, the charge voltage is returned to the CPU 101, A / D converted, and compared with the charge voltage information of the EEPROM-IC 119 to determine whether or not the charge is completed. To check.

Reference numeral 102 denotes an AF-IC for distance measurement that measures the distance to the subject based on a control signal from the CPU 101. Then, the obtained distance measurement data is sent to the CPU 101 via the serial data bus. At this time, if the subject is dark and distance measurement is not possible, AF assist light
The distance is measured by emitting 103 light.

The EEPROM-IC 119 is an electrically rewritable ROM that stores various adjustment values such as the number of film frames, exposure compensation information, strobe charging voltage information, and battery check information, and stores data with the CPU 101 via a serial data bus. Communication is performed.

Reference numeral 104 denotes an interface IC controlled by the CPU 101, which converts the luminance of the subject into a voltage based on the photometric information obtained from the split-type SPD 105 and sends the voltage to the CPU 101. Then, the CPU 101 converts the subject brightness into digital data by the built-in A / D converter and takes it into the RAM in the CPU.
Reference numeral 106 denotes an LED display unit, which uses a strobe LED if the strobe can emit light under the control of the CPU, and an AF if the AFIC 102 can measure the distance.
The LED, the spot LED in the spot mode, and the self LED when the self-timer operation or the AF auxiliary light is required are turned on. Reference numeral 121 denotes a sector opening / closing magnet.

Reference numerals 107 and 108 denote motor driving ICs, and zoom motors 109 and A
E, and drives the AF motor 110, the hoisting / rewinding motor 111, and the like. The zoom motor 108 includes a zoom encoder (Z
E) 112 is provided to inform the CPU 101 of the current zoom position. The AE, the AF motor 110 and the hoisting / rewinding motor 111 are provided with photointerrupters (hereinafter abbreviated as PI) 113 and 114, respectively. The number of CI113 pulses is calculated, and the CPU counts the pulses to control lens driving. In addition, since a pulse is output by the movement of the film at the time of winding, one frame of the film is wound by counting the number of pulses.

Reference numeral 120 denotes a remote control receiving photodiode. When a predetermined pulse is emitted from an infrared LED from a remote control transmitter (not shown), the light is received by the photodiode 120 and transmitted to the CPU 101 through the interface IC 104. Then, the CPU 101 checks whether or not the signal is a remote control signal, and if the signal is a normal remote control signal, performs a release operation.

FIG. 2 shows the flash unit 118 in FIG.
FIG. 3 is a circuit diagram showing an example of the embodiment. This strobe unit 118
Are connected to the CPU 101 via terminals CHRGE, VST, and TRG, respectively. The above terminal “CHRGE” is a strobe charge terminal, VS
T is a charge voltage monitoring terminal, which is A / D converted by the CPU and stops charging the main capacitor of the strobe when a predetermined voltage is reached. "TRG" is a strobe light emitting terminal, and Vcc represents a power supply voltage and a GND ground potential, respectively.

When the second release switch 2R of the switch operation unit 116 in FIG. 1 is turned on, the CPU 101 changes the level of the signal output to the terminal “CHRGE” from “H” to “L”. Then, the transistors Q601 and Q6 of the strobe unit shown in FIG.
02 turns on, resistors R501, R502, R503, R504, transistor Q5
01, Q502, diodes D501, D601, capacitor C601, step-up transformer T501 are connected as shown in FIG.
The oscillation operation of the DC / DC converter starts. When oscillation starts, a high voltage is generated on the secondary side of the step-up transformer T501,
The main capacitor C402 is charged through the diodes D502 and D401. At the same time, from the middle tap of the step-up transformer T501
A voltage of about 30 V is generated for biasing the IGBT (Insulated Gate Bipolar Transistor) Q401, and the diode D503,
The capacitor C401 is charged via the resistor R401. The constant voltage diode D402 is inserted so that the charging voltage does not increase.

The resistor R505 is used to transfer the charging voltage information of the main capacitor C402 to CP.
One of the voltage divider resistors to U101, while the other is CRU
It is provided within. Note that the capacitor C502 is for absorbing noise. When determining that the charging is completed, the CPU 101 sets the terminal CHRGE to “H” and stops the oscillation operation of the DC / DC converter. The charge voltage information is stored in the EEPROM-IC 119 shown in FIG.

During flash firing, the CPU 101 changes the TRG signal from “H” to “L”.
To Then, the transistor Q is connected via the resistors R408 and R407.
404 and Q402 are turned on.
IGBT Q401 turns on. Then, the capacitor C403 and the LC circuit of the trigger transformer T401 oscillate, and the xenon tube DS401
Is triggered to emit light. Diode D402, capacitor C
The xenon tube DS401 continues to emit light even when the voltage across the main capacitor C402 is reduced.

When the TRG signal becomes “H”, the transistors Q402 and Q404 turn off. At this time, the transistor Q403 has a resistance for a moment.
Since the IGBT Q401 is turned on via R406, the IGBT Q401 is immediately turned off, and the strobe light emission stops. Therefore, the CPU can properly control the light emission of the xenon tube DS401 in accordance with the “H” and “L” of the TRG signal.

The remote control reception confirmation light emission and the red-eye prevention light emission use this control method so that the strobe light is emitted intermittently within a range that does not affect the main light emission. In the case of a release by a remote controller as shown in a flowchart to be described later, a strobe light of a small light emission is emitted, so that the user is notified that a remote control signal has been received. Can be recognized. The present invention is performed based on the photometry result during the shutter drive control.

The operation of the present embodiment thus configured will be described below with reference to the flowcharts of FIG.

FIG. 3 is a flowchart of a power-on reset. In the figure, when a battery is turned on or a power switch is turned on, a CPU executes a program. First "port initialization, RAM clear" performed (step S1), and recognizes the camera state at the time of previous shooting Nde read once the contents of the E ² PROM (step S2). Check the rear cover switch (step S3). If it is open, open the rear cover processing (step S4).
If closed, check the status of the last time (BKJF) (Step S
Five). In this case, if the previous time is open, the idle feeding is performed (step S
6) If it is closed, do nothing and go to step S7.

In step S7, it is checked whether or not "rewinding" is in progress. If rewinding is in progress, the process proceeds to step S8 to perform rewinding. Next, in step S9, it is checked whether or not "winding", and if it is during winding, the process proceeds to step S10 to perform "winding". Then, the process proceeds to step S11, where the "power switch" is checked. This is the operation for restoring the camera state at the time of the previous shooting.

In step S11, if the power switch is on, the display LCD is turned on in steps S12 to S14 to enable the interrupt and the HAL
It becomes T state. This HALT state is released at regular intervals, and when released, a MAIN loop described later is executed. On the other hand, if the power switch is off, the LCD in steps S15 to S17
Is turned off to enable the interrupt and then enter the STOP state. When an interrupt occurs, the MAIN loop is executed.

FIG. 4 is a flowchart of the "MAIN" loop.
In this MAIN lube, it is first checked whether or not the interrupt is a piglet (step S21). If the rear cover is interrupted, the rear cover switch is checked in step S22. If the rear cover is open, the rear cover opening process in step S4 is performed. If the rear cover is closed, the process proceeds to step S23. In step S23, the previous state is checked. If the previous time is open, the idle feed is performed. If the previous time is closed, step S2 is performed.
Proceed to 4. In this step S24, it is checked whether or not it is a remote controller interrupt.
To execute the subroutine "Remote control reception".
That is, when light is emitted from the remote control transmitter to the remote control receiving diode, an interrupt signal and a remote control signal are input to the CPU 101 from the receiving circuit of the IFIC 104 (see FIG. 1). Therefore, the CPU 101 checks the remote control signal, and stores a release signal from the remote control if the release signal is received. Then, the process proceeds to steps S26 and S27, and it is checked whether or not a rewind interrupt is caused by pressing the rewind button. If the rewind button is interrupted, next, it is checked whether or not the rewind button is turned on. And rewind.

In step S28, it is checked whether or not the power switch has been turned off. If the power switch has been turned off, the process proceeds to STLOOP. Also,
If the power switch is on, it is checked whether or not 90 seconds have elapsed (step S29).
The process proceeds to OOP, and if 90 seconds have not elapsed, the process proceeds to step S30. Check the key input, and if any key is pressed, go to step S31.
Proceed to P. In this step S31, the first release switch "1R" (inside the switch operation unit 115 in FIG. 1) is checked, and if it is on, the subroutine "R1" processing of step S32 is executed. The "R1" process will be described later in detail with reference to FIG. If the first release switch 1R is off, step S3
3, the process proceeds to S35, where the Z-UP or Z-DOWN switch is checked, and if either switch is pressed, a zoom operation is performed (step S34).

If both switches are off, the process proceeds to step S36, where S
It is checked whether or not the POT switch has been pressed, and if so, spot metering is performed (step S37). SPOT
If the switch is off, the flow advances to step S38 to check whether the FLASH switch is pressed. If the switch is on, the flow advances to step S39 to switch the flash mode, that is, the AUTO mode, the red-eye mode, and the strobe off mode sequentially.
In the AUTO mode, the average metering and the spot metering are executed, and if there is a certain luminance difference, it is determined that the subject is backlit and the strobe is automatically emitted. In the red-eye mode, pre-flash is performed to prevent a so-called red-eye phenomenon in which human eyes appear red by strobe light emission, thereby preventing the red-eye phenomenon.
If the FLASH switch is off in step S38, step S4
0 is executed, and if the SELF switch is pressed, a self-timer mode is set (step S41). Check above and H
Proceed to TLOOP and enter the standby state.

FIG. 5 and FIG. 6 show steps S32 in FIG.
5 is a flowchart showing details of a subroutine "R1" of FIG. In FIG. 5, since the brightness is low or the backlight is in a state, the remote control signal is not emitted even when the camera receives a remote control signal in the remote control mode. Instead, the user is notified of the remote control reception by the main flash emission. On the other hand, in FIG. 6, when the remote control signal in the remote control mode is received by the camera, the remote control reception confirmation light emission is performed regardless of the presence or absence of the flash light emission. I have to. In these figures, steps S51 to S60 and steps S66 to S69 are exactly the same, and the difference is that
Only the arrangement order of 1 to S65.

In FIG. 5, when the first release switch 1R (see FIG. 1) is turned on, the process proceeds to step S51 to clear the display timer of 90 seconds. Then, AF is performed to measure the distance (step S52). Next, AF calculation is performed (step S53), and the result is converted into a lens extension amount. Then, photometry is performed (step S5
4), determine the shutter time by photometric calculation (step S55),
The lens is extended (step S56). At this time, the pulses from the AF photo-interrupter are counted from the off state of the AF switch (in the switch operation unit 115 in FIG. 1) based on the feeding amount calculated in step S56, and the count value becomes a constant value. Stop the motor where it left off.

In step S57, it is checked whether or not the second release switch 2R is turned on. If it is off, the process proceeds to step S58, and the first release switch 1R is checked again.
If the first release switch 1R is off, the process returns. If it is on, the process returns to step S57, and steps S57 and S58.
While waiting for the second release switch 2R to be turned on. Then, when the second release switch 2R is turned on, the exposure control operation of the following steps S59 to S65 is executed. That is, if the self-timer mode is set in steps S59 and S60, the self-timer is operated. In step S63, based on the photometric data obtained in the photometric operation in step S54, it is determined whether or not strobe light emission is necessary due to lack of illuminance due to, for example, low luminance or backlighting. Steps S64 and S65 if strobe light is required
In the red-eye mode, a small flash for preventing red-eye is performed. If there is no need to use a flash, the steps S61 and S62 are performed.
If the mode is the remote control mode, the remote control reception confirmation light emission is performed.

Next, sector driving is performed at the calculated shutter time (step 66). The AE switch is used as an exposure start signal, and the flow advances to step S67 to control the shutter and then wind the film (step S67). Then, the process proceeds to steps S68 and S69 to perform a lens reset, perform a strobe charger, and return.

In other words, since the photometric result in step S54 is low luminance, for example, if the low luminance flag is set,
Since the main flash of the flash for photographing is performed in step S66, it is assumed that the main flash of the flash also serves as the remote control reception confirmation light emission. Only when the electronic flash does not emit, the remote control reception confirmation light emission is performed in step S62.

Next, FIG. 6 will be described. In FIG. 6, as described above, steps S51 to S60 and steps S66 to S69 have the same contents and arrangement as those in FIG. 5, and a description thereof will be omitted. Steps S61 to S65 have the same contents but different arrangements, and therefore will be briefly described below. That is,
Irrespective of the photometry result in step S54, if in the remote control mode in steps S61 and S62, remote control reception confirmation light emission is performed. Then, in steps S63 to S65, in the red-eye prevention mode, small light emission for red-eye prevention is performed prior to the shutter control in step S66.

FIG. 7 is a flowchart showing the details of step S62 “remote control confirmation light emission” in FIGS.
In the figure, when this flow starts, the process first proceeds to step S71, where the signal TRG supplied from the CPU 101 to the TRG terminal shown in FIG. Then, the process proceeds to step S72, and when a predetermined minute time has elapsed, the process proceeds to step S73 to count the number of RTG “L” executed in step S71, that is, the number of small light emission for remote control reception confirmation. Then, the process proceeds to step S74, in which the terminal TRG in FIG. 2 is set to the “H” level to stop the minute light emission. Thereafter, the process proceeds to step S75 to wait until a predetermined time has elapsed, and then proceeds to step S76. In this step S76, it is determined whether or not light emission has been performed a predetermined number of times,
The process returns to step S71 and repeats steps S71 to S76 until the number of times of light emission of the minute strobe light for remote control reception confirmation reaches a predetermined number. When the remote control reception confirmation light emission reaches a predetermined number of times, the process returns.

[Effects of the Invention] As described above, according to the present invention, by performing the reception display of the camera and the minute light emission of the flash device, the user can recognize this even when the subject is bright at a long distance or a short distance, and can take a picture. There is a remarkable effect that main light emission at the time is also possible.

[Brief description of the drawings]

FIG. 1 is a block diagram of a zoom lens camera to which a camera receiving and displaying apparatus according to the present invention is applied, FIG. 2 is a circuit diagram showing an example of a strobe unit in FIG. 1, and FIG. FIG. 4 is a flowchart of a power-on reset, FIG. 4 is a flowchart of a MAIN loop, FIGS. 5 and 6 are flowcharts showing details of a subroutine of “R1” in FIG. 4, and FIG. 7 is a flowchart showing details of a subroutine of remote control reception confirmation light emission in FIG. 101 CPU (control means and photographing operation control means) 118 strobe unit (strobe device) 120 remote control receiving diode (receiving means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 15/05

Claims (1)

(57) [Claims] 1. A receiving device for receiving a photographing operation signal from a remote control device, a strobe device capable of controlling normal light emission and a flash light emission of a small light emission amount, and a strobe device for receiving the photographing operation signal. A reception display device for a camera, comprising: control means for executing a minute light emission; and photographing operation control means for performing a photographing operation after the minute light emission.