JP3902871B2 - Camera with red-eye reduction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sequence of a red-eye mitigation device for a camera with a red-eye mitigation device.
[0002]
[Prior art]
The release timing of the conventional camera when using the red-eye mitigation device is a camera in which the release switch is turned on at the first stroke and the second stroke, and the first stroke switch is turned on. When the second stroke switch is turned on, the second stroke is not received unless the predetermined time (T ₁ ) elapses at the same time as the pre-irradiation light source for red-eye reduction is turned on. If the first stroke switch is turned off and the first stroke switch is turned off regardless of the elapse of a predetermined time (T ₁ ), the timer is reset and the first stroke is again activated. When the switch is turned on, a predetermined period (T ₁ ) is measured, and the second stroke switch is not accepted during that period.
[0003]
[Problems to be solved by the invention]
However, in the above conventional example, when the release switch is turned off once, the timer for the red-eye mitigation pre-irradiation light source lighting time is reset, so that the first stroke and the second stroke are set. Even when the switch is turned on, there is a drawback that a time lag until the release operation of the time for turning on the pre-irradiation light source for a predetermined time occurs in the red-eye reduction mode.
[0004]
Incidentally, the predetermined time (T ₁ ) requires a time of about 1 second to 2 seconds so that the size of the human pupil is minimized.
[0005]
An object of the invention according to the present application is to provide a camera with a red-eye mitigation device that can reduce a release time lag when the red-eye mitigation device is used.
[0006]
[Means for Solving the Problems]
The camera with a red-eye mitigation device of the present invention includes a red-eye mitigation light source that starts pre-irradiation in response to an operation of a first release switch, a flash light emitting device that irradiates in accordance with an operation of a second release switch, and the pre-light emission device. In a camera with a red-eye reduction device having a means for prohibiting acceptance of the operation of the second release switch for a predetermined time after the start of irradiation, the camera is operated again after the operation of the first release switch is released. And time prohibiting time for shortening the time for prohibiting acceptance of the operation of the second release switch when the time measured by the time measuring means is shorter than the preset time. Changing means.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 are a block diagram showing an embodiment of the present invention and a flow chart showing the operation thereof. In FIG. 1, 1 is a battery as a power source, 2 is a CPU for controlling the operation of the camera, and 3 is turned on by a first stroke in a release switch having a first and a second stroke. The switch 4 is a switch that is turned on by the second stroke of the release switch, 5 is a lamp that is a red-eye mitigating pre-irradiation light source, 6 is a transistor that drives the lamp 5 that is a light source, and 7 is a transistor 6. A pull-up resistor between the base and the emitter of the transistor, 8 is a resistor for limiting the base current of the transistor 6, 9 is a time measuring means for measuring time, 10 is a flash light emitting device (strobe) of the camera, and 11 is a camera. Actuator driving means for driving the actuators, 12 is a photometric means for measuring the luminance of the main subject, and 13 is a storage means for storing data necessary for the camera.
[0008]
In the above configuration, the sequence of the present invention will be described with reference to the flowchart of FIG.
[0009]
2 is abbreviated as “S”.
[0010]
First, in S101, the switch 3 in FIG. 1 is confirmed.
[0011]
When the switch 3 is turned on, the process proceeds to S102. If the switch 3 is off, the process waits at S101 until the switch 3 is turned on. In S102, the luminance of the main subject is measured using the photometric means 12 in FIG. In S103, the photometric value obtained in S102 is compared with a preset luminance to determine whether it is bright or dark. If it is bright, the process proceeds to S119. If it is dark, the process proceeds to S104. In S104, since it is determined that the main subject brightness is low, the flash light emitting device 10 in FIG. 1 is charged. In step S105, the timer (time count) data in the data storage means 13 in FIG. 1 is reset. If the timer data here is T ₁ ′, T ₁ ′ is set to “0”. In S106, the time is effective in the red-eye relaxation (the time that is set in advance) Timer - set as cutoff time T _1. In S107, a predetermined time in S106, the timer in S105 - de - calculate the data _{T 1} ', again set as _{T 1} again. This is the S106 in the initial operation, the time of _{T 1} of the S107 is the same.
[0012]
The calculation formula is T ₁ = T ₁ −T ₁ ′.
Here, since T ₁ ′ = “0”, T ₁ = T ₁ . At the same time, the timer is started.
[0013]
In S108, the lamp 5 which is the pre-irradiation light source for red-eye reduction in FIG. 1 is turned on. In S109, it is determined whether or not the second stroke switch 4 in FIG. 1 as the main release switch is turned on after the lamp is turned on. If it is on in this state, the process proceeds to S110, and if it is off, the process proceeds to S111. In S110, the timer set in S107 - de - determines whether data _{T 1} times is completed, upon completion proceeds to S117. If not completed, the process returns to S108.
[0014]
When the process proceeds to S117, the lamp 5 is turned off, and the process proceeds to S118. In S118, the main release operation of the camera is performed, and the process proceeds to S120. In S120, the T ₁ ′ and T ₁ timer set in S105 and S106 are reset, and the initial switch reception standby state is restored.
[0015]
This is the main release operation when the red-eye reduction function is normally operated.
[0016]
If it is determined in S103 that the photometric value obtained in S102 is brighter than the preset luminance, the process proceeds to S119, and the release operation is performed without using the flash light emitting device (S119). .
[0017]
Next, the sequence that is a feature of the present invention will be described.
[0018]
In S109 in FIG. 2, when the switch 4 which is the main release operation start switch is OFF, the process proceeds to S111.
[0019]
In S111, it is determined whether or not the switch 3 that is turned on in the first stroke is turned on. If it is on, the process returns to S108, and if it is off, the process proceeds to S112. Here, in S108 to S111, when the switch 3 is turned on and the switch 4 is turned off, it is in a state of waiting for whether the switch 3 is turned off or the switch 4 is turned on next.
[0020]
Next, in S112, since the switch 3 is turned off, the lamp 5 in FIG. 1, which is a light source for red-eye reduction, is turned off. In S113, the time T ₁ 'counted by the timer in S107 is input to the data storage means 13 in FIG. This is the time when the switch 3 is pressed and held (approximately equal to the time when the red-eye mitigation light source is lit). In S114, the timer set by the time T ₂ - the Star - to bets. In S115, the timer set in T ₂ - to determine whether the count time has been completed, if the complete process proceeds to S120, the initial state again. If not completed, the process proceeds to S116. In S116, it is determined whether the switch 3 in FIG. 1 is on or off. When it is off, the process returns to S115. If it is on, the process proceeds to S107. In this S114 to S116, the time until the switch 3 in FIG. 1 is again turned on after it is once turned off, the timer set in T ₂ - and so as to determine whether greater than or less than. S116 S107 in the case of on-the _{sets T 1 = T 1 -T 1 '} . That is, T ₁ is a time required for the effect of red-eye reduction, T ₁ ′ is a time during which the light source for red-eye reduction is on for a shorter period than the effect time of red-eye reduction, and the previously set time T ₁ timer - in a shorter time than the time, timer set time T ₁ - will be set. FIG. 3 is a diagram showing the above-mentioned flow chart in a timing chart.
[0021]
First, normal operation, the first operation of the present invention, and the second operation of the present invention are shown from the left end. In FIG. 3, normally, the red-eye mitigation light source is turned on for a predetermined effective time (T ₁ ) almost simultaneously with the switch 3 being turned on, and after confirming that the switch 4 is turned on, the main photographing operation is performed. As a result, the pupil of the main subject is reduced as indicated by a in FIG. 4 so that the minimum diameter is obtained in the photographing after T ₁ hour. Next, a first operation of the present invention, _'lamp 5 T ₁ is the red-eye relaxation light sources substantially simultaneously in FIG. 1 when the time was slightly _pushed' to lighting time switch 3 in FIG. 1 T _1. Then, before the switch 4 in Figure 1 is pressed, when the switch 3 is turned off, the timer set by the time T ₂ - a static - is DOO, again switch before the predetermined time T ₂ has elapsed When 3 is pressed, the lighting time required for the red-eye reduction effect is shortened. Here, the time T ₁ −T ₁ ′ is the pre-irradiation lighting time of the red-eye mitigation light source, and the photographing operation is performed.
[0022]
This is because, after T _{1 'light} source lighting, as shown in b of FIG. 4, up to T ₂ hours, human pupil, therefore, to be lit again red-eye reduction light source into T within ₂ hours there is a feature that squeeze The time until the first aperture of the pupil is reduced. This time, can be shorter than the original T ₁ hour. Here, T ₁ −T ₁ ′ is set. Next, as a second operation of the present invention, after the switch 3 is turned off (after turning off the red-eye mitigating light source), after T ₂ hours have passed, the human pupil goes in the direction of reopening and before the red-eye mitigating light source is turned on. It becomes the same size as the pupil diameter of the state.
[0023]
For this purpose, after a lapse of T ₂ or higher, it does not change the normal operation, a time lag until the shooting time T ₁ (light source lighting time) is required.
[0024]
As an effect of the present embodiment, the effect of alleviating red-eye can be maximized and unnecessary shooting time lag can be eliminated.
[0025]
Correspondence with Embodiment of the Invention
The lamp 5 in the embodiment corresponds to a pre-irradiation light source for red-eye reduction, the time measuring means 9 corresponds to the time measuring means, and the switch 3 that is turned on by the first stroke among the release switches is: The switch 4 that corresponds to the first switch of the release switch and is turned on by the second stroke corresponds to the second switch.
[0026]
【The invention's effect】
As described above , according to the present invention, the release time lag can be reduced when the red-eye reduction device is used, and there is an effect that the shutter chance is not missed.
[Brief description of the drawings]
FIG. 1 is a circuit block diagram showing an embodiment of the present invention.
FIG. 2 is a flowchart according to an embodiment of the present invention.
FIG. 3 is a timing chart according to an embodiment of the present invention.
FIG. 4 is a graph illustrating an embodiment of the present invention.
[Explanation of symbols]
1 Battery 2 CPU
3, 4 Switch 5 Lamp 6 Transistor 7, 8 Resistance 9 Time measuring means 10 Flash light emitting device 11 Actuator driving means 12 Photometric means 13 Data storage means

Claims (3)

A red-eye mitigating light source that starts pre-irradiation in response to an operation of the first release switch;
A flash light emitting device that emits light in accordance with the operation of the second release switch ;
In a camera with a red-eye mitigation device having means for prohibiting acceptance of the operation of the second release switch for a predetermined time after starting the pre-irradiation,
Time measuring means for measuring the time until the first release switch is operated again after the first release switch is operated;
And a prohibition time changing means for shortening a time for prohibiting acceptance of the operation of the second release switch when the time measured by the time measuring means is shorter than a preset time. A camera with a red-eye mitigation device.   2. The camera with a red-eye reduction device according to claim 1, wherein the light source for red-eye reduction is a lamp.   2. The camera with a red-eye reduction device according to claim 1, wherein the first release switch and the second release switch are constituted by two-stage switches.

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