JP2977358B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera having a red-eye reduction device.

[0002]

2. Description of the Related Art Heretofore, there are three types of cameras having a pre-irradiation type red-eye reduction device as follows.

[0003] From the start of pre-irradiation until the shutter is actually released, the release lock is automatically applied,
A device in which pre-irradiation is performed for a predetermined period so that the red-eye reduction effect is maximized, then a shutter is automatically released, and at the same time, a strobe light is emitted and a photographing operation is performed.

The camera is developed for camera users who do not like the release time lag that occurs in cameras such as the above, and selects a mode in which pre-irradiation is performed to perform strobe photographing or a mode in which strobe photographing is performed without performing pre-irradiation. What is configured to be able to.

When the camera user presses the release button
When the shutter button is pressed down to the stroke, the state is maintained for a predetermined time, during which pre-irradiation is performed, and thereafter, when the photographer presses the release button to the second stroke, the shutter is released and flash photography is performed. What you have.

[0006]

However, the conventional camera has the following disadvantages.

In the conventional camera of the related art, there is a risk that a shutter chance is missed because a release time lag for a predetermined period always occurs during flash photography.

In the conventional camera of the related art, it is possible for the photographer to select whether or not to perform pre-irradiation, but there is a hassle of having to select a mode. In addition, the number of operation switches for mode selection increases, which increases costs.

In the above example, the operability is simple, but there is a drawback that it is difficult for the photographer to determine an appropriate pre-irradiation time.

[0010] It is therefore an object of the present invention to provide a camera with a red-eye reduction device that does not have the above-mentioned disadvantages.

[0011]

The object of the present invention is realized.
The shutter release button can be operated in two stages.
And the shutter release button is operated to the first stage
To operate pre-irradiation means for red-eye reduction in the state
Noh and the shutter release button is operated until the second stage
Shutter operation and strobe light emission
Camera with a shutter release function.
The release button is held operated to the first stage.
Detect if the time spent is longer or shorter than the specified time
First means and the shutter release button
The time when the floor is maintained in the operated state at the predetermined time
When it is detected by the first means that it is shorter than
Has a second means for issuing a warning.
You .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the camera according to the present invention will be described below.

In FIG. 2, 1 is a battery as a power supply, 2 is a capacitor for smoothing the voltage of the battery 1,
3 is a diode for rectifying the battery 1 and supplying power to the sequence controller of the camera. 4 is a capacitor for smoothing and backing up the power of the sequence controller. 5 is a sequence controller for controlling the sequence of the camera. Lamp for pre-irradiation used to reduce red-eye caused by flash photography, 7
Is a transistor for driving the lamp 6, 8 is a display LED for displaying the state of the camera, 9 is a transistor for driving the LED 8, 10 is a driving circuit for driving a motor for feeding the film, and 11 is a driving circuit for driving the film. A motor, 12 a drive circuit for driving a shutter, 13 a known flash circuit, 14 a xenon flash tube for flash photography, 15 a photometric circuit for measuring the brightness of a subject, and 16 a camera cover for opening and closing. A switch (barrier switch) for detecting, a switch (SW1) for turning on the first stroke of the release button of the camera (SW1), and a switch (SW1) for turning on the second stroke of the release button of the camera
2) and 19 are switches for performing self-timer shooting,
Reference numeral 20 denotes a switch for detecting the ISO sensitivity of the film.

FIG. 1 is a flowchart showing the operation of the camera having the configuration shown in FIG. 2. The operation will be described with reference to FIG. First, when the battery 1 serving as a power supply is inserted into the camera body, the power supply V _DD is supplied to the sequence controller 5 through the diode 3, a predetermined power-up clear circuit operates, and the sequence controller 5 starts operating. At this time, the RAM in the sequence controller 5 not shown in FIG. 2 is initialized, and a program for detecting the states of the switches 16 to 20 is operated. At this time, if there is no change in each of the switches 16 to 20, the sequence controller 5 continues to monitor the switches 16 to 20 (the state at this time is hereinafter referred to as SW WAIT). At this time, the lens barrier is open and the barrier switch 1
When the release button is pushed down to the first stroke while the switch 6 is ON and the switch 17 (SW1) is turned ON, the sequence controller 5 goes out of the SW WAIT state and performs a known battery check operation. At this time, if the battery voltage is low, it is determined that the battery is NG, the sequence is interrupted, and the flow returns to SW WAIT. Battery read ISO of it if the film is sufficiently high voltages, performs photometry by using a known photometric circuit, if darker than a predetermined brightness (e.g., E _V 10.5) starts charging the flash. At this time, until the strobe charging is completed, the charging is completed while detecting the states of the barrier switches 16 and 17. At this time, if either the barrier switch 16 or the switch 17 is turned off, the charging is stopped, and the process returns to the SW WAIT for monitoring each switch again. If the charging is completed while the switches 16 and 17 remain ON, the charging is immediately stopped, and the above-described battery check operation is performed again.
If K, the timer means in the sequence controller 5 not shown is started. At this time, if the photometry result is darker than a predetermined value, the flash photography is performed, so that the pre-irradiation lamp 6 is turned on to alleviate the red-eye phenomenon at the time of the flash photography, and that the photographing preparation is completed. LED 8 is turned on to inform the user. Thereafter, the state of the timer is checked while detecting the state of each of the barrier switch 16 and the switches 17 and 18, and if it is less than a predetermined value (for example, 1.5 seconds), the LED 8 is turned on and off, and the lamp 6 is pre-irradiated. Warns the photographer that the red-eye reduction effect of the camera is not sufficient, holds the release button in the first stroke, and prompts the user not to press the release button until the second stroke.
When the timer has exceeded a predetermined value (for example, 1.5 seconds), the lamp 6 is switched from blinking to lighting, and monitoring of the switches 16, 17 and 18 is continued. However, when either the switch 16 or 17 is turned off, the LED 8 and the lamp 6 are turned off irrespective of the value of the timer, and the process returns to SW WAIT. When the release button is pressed while the switches 16 and 17 are turned on and the switch 18 is turned on, the lamp 6 and the LED 8 are turned off regardless of the timer value. Do. Thereafter, a predetermined operation such as winding is performed, and the process returns to SW WAIT again.

The operation when the brightness of the object is sufficiently bright is not described in detail, but is shown in the flowchart of FIG.

[0016]

As described above, in the camera according to the present invention, pre-irradiation is performed only while the first stroke of the shutter release button is held, and when the pre-irradiation time is shorter than a predetermined value, a warning is given by the display means. If the value is equal to or more than the predetermined value, the warning is released without warning.

According to the camera of the present invention, the release time lag can be prevented, and the photographer can be notified of the red-eye reduction effect. In addition, operability is simple and there is no increase in cost because no additional switch or the like is involved.

[Brief description of the drawings]

FIG. 1 is a flowchart showing operations and functions of a camera to which the present invention is applied.

FIG. 2 is a schematic diagram of an electrical configuration of the camera having a configuration for executing the flowchart shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Battery 2 ... Capacitor 3 ... Diode 4 ... Capacitor 5 ... Sequence controller 6 ... Lamp 7 ... Transistor 8 ... LED 9 ... Transistor 10 ... Motor drive circuit 11 ... Motor 12 ... Shutter drive circuit 13 ... Strobe circuit 14 ... Xe flash tube 15 photometric circuit 16-20 switch

Claims (1)

(57) [Claims] 1. A shutter release button that can be two-stage floor operations, said shutter release button is first stage or
A function to operate the pre-irradiation means for red-eye reduction in a state in which the operation, the shutter release button is the second stage or
In a camera having a function of causing the shutter operation and flash emission in a state of being operation, the time that the shutter release button is held in a state of being operated to said first stage a predetermined First means for detecting whether it is longer or shorter than the time, and the first means that the time during which the shutter release button is kept operated to the first stage is shorter than the predetermined time. A second means for issuing a warning when detected by the means.