JPS6258233A - Actuation displaying device of camera - Google Patents

Abstract

PURPOSE:To display a warning when photographs are taken within the shortest dis tance and an exposure ending display at the time of photographing by using a self switch without providing any luminous bodies additionally, by controlling a luminous body for displaying a focused condition to be turned on when the distance to an object is within the shortest distance and, at the same time, turning on another luminous body for displaying self-photographing condition. CONSTITUTION:A luminous body 9 for displaying focused condition is an LED emitting green light and provided in the vicinity of the eyepiece side of a finder so that its luminous condition can be recognized when locking an object through the finder, and the surface of the luminous body 9 is covered with a milky while light transmissive plate. This luminous body 9 is controlled in such a way that the body 9 s put under an unturned-on condition until a lens 6 is driven to its focusing position, turned on when the lens 6 is atopped at its focusing position, and blinked when the distance to an object is within the shortest distance. Another luminous body 10 for displaying self-photographing condition is controlled in such a way that the luminous body 10 is turned on when a self switch 13 is turned on, blinked after a period of seven seconds has passed, and once turned off after a period of three seconds are passed further. After an exposure is terminated, the luminous body 10 is again turned on and is finally turned off after the lens 6 returns to its original position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera operation display, and more particularly to a lighting display of a light emitting body for indicating focus and a light emitting body for indicating self-photography.

[Description of the Prior Art] As is well known, in a camera equipped with an automatic focus adjustment function (AF), a green light emitting diode is used to display the focus to notify the user of the focus state before the shutter release. is being made. This light emitting diode is, for example,
The light is turned off during focusing or in an out-of-focus state, and turns on when a focused state is achieved. After such focusing is completed, a shirt release is performed.

By the way, a camera has a close distance that is the shortest distance at which it can photograph, and if the distance to the subject is within this close distance, the image will be blurred. When the distance to the subject is within such a close distance, the light emitting diode in the above-mentioned conventional technology generally gives the same indication as the out-of-focus state, and as a result, it is possible to directly indicate the out-of-focus state. However, it was difficult to provide a direct understanding that the photograph was taken at close range.

Furthermore, recent cameras have adopted a so-called electromagnetic self-timer that electrically regulates the timer time for self-photographing using a timer circuit.

Such an electromagnetic self-timer is equipped with a red light emitting diode for self-activation display, and is controlled to be turned on during the timer period, and turned off when the timer elapses. However, since self-photography ends with the exposure following the expiry of the timer time, simply displaying the end of the timer time as in the above-mentioned conventional technology may lead people to misunderstand that the end of the timer time is the end of the display. In particular, when the exposure time is long, the possibility of such trouble occurring increases.

[Object of the Invention] The present invention has been made based on the above-mentioned viewpoints, and its object is to provide a warning display for close-up photography and an exposure end display for self-photography without adding a light emitting body. The purpose of this invention is to provide a camera operation display device that can be used.

[Means for Achieving the Object] As shown in FIG. 1, the present invention has an automatic focus adjustment function, an automatic exposure adjustment function, and a self-photography function, and the automatic focus adjustment function allows the user to obtain a focused state. In a camera that uses a focus display light emitting element to indicate focus when the object is focused, and also displays a self-operation display using a self-indication light emitting element during self-shooting, the distance measurement information obtained through the automatic focus adjustment function Based on this, it detects when the distance to the subject is within close range, and upon this detection, it controls the lighting of the focus indicator to give a different display from the in-focus and out-of-focus indicators, and also controls automatic exposure. Detects the end of exposure based on the exposure information obtained by the adjustment function,
The above object is achieved by an operation display device that controls lighting of the self-indication light emitter so that at least the end of exposure during self-photography is indicated by this detection.

[Embodiment J of the invention FIG. 2 is a configuration diagram showing an embodiment of the present invention.

In the figure, 1 is a microcomputer, and this microcomputer 1 controls an AF control system 2 that performs automatic focus adjustment, an AE control system 3 that performs exposure adjustment, a strobe control circuit 4, and a display drive circuit 5. There is.

The AF control system 2 includes a lens control mechanism that controls the extension, stop, and retraction of the imaging lens 6, a light emitting element for distance measurement, and a light emitting element that receives reflected light from the subject to obtain distance measurement information. It includes a light receiving circuit for feeding the microcomputer 1, and a scanning mechanism that scans a distance measuring light emitting element from close range to infinity. Automatic focus adjustment is performed by scanning a light emitting element for distance measurement from close range to infinity under the control of the microcomputer 1, and in the meantime calculating and processing the distance measurement information given from the light receiving surface path to determine the focus position. This is done by moving the lens 6 out from the origin position (near position or infinite position) and temporarily fixing it at this in-focus position using means such as an electromagnetic magnet. It should be noted that the lens 6 is returned to the original position after the photographing is completed and is prepared for the first photographing.

The AE control system 3 includes a shutter control mechanism that drives the aperture-cum-shutter 7, a photometric element that detects the brightness of the shooting space, and a photometric signal from the photometric element that is input to the microprocessor to output photometric information according to the signal. It is equipped with an exposure control circuit and the like to provide information to the computer l. The exposure control circuit includes a voltage conversion circuit that converts the current signal of the photometric element into a voltage, a V/F converter that converts the voltage signal of the voltage conversion circuit into a frequency, and a V/F converter that converts the voltage signal of the voltage conversion circuit into a voltage.
It has a counter for counting the pulse output of the F converter, and the output of this counter is given to the microcomputer l as photometric information. Photometric information is
In the microcomputer 1, it is used to calculate exposure information for controlling the shutter control mechanism, as well as to determine whether or not a strobe is used, to control it, and to determine whether exposure is complete.

The strobe control circuit 4 controls the discharge of the strobe tube 8 and its time under the control of the microcomputer 1.

The display drive circuit 5 controls the driving of the focus display light emitter 9 and the self display light emitter 10 under the control of the microcomputer 1. The focus display light emitter 9 is configured as shown in FIG. In order to be able to recognize the light emitting state when the eye is brought into close view, a green light emitting diode is disposed near the eyepiece side of the finder 11, and its surface is covered with a milky-white translucent plate. Such a focus display light emitter 9 is kept in a non-lighted state until the lens 6 is driven and controlled to the in-focus position, and is turned on when the lens 6 stops at the in-focus position, and when the distance to the subject becomes smaller. It is controlled to blink when it is within close range. As shown in FIG. 4, the self-display light emitting body 1O is a light emitting diode with a red emission color disposed near the light projection surface of the strobe 12, and its surface is a diffuser that covers the light projection surface of the strobe 12. covered with a board. Such a self-indicating light emitting body 10 is turned on when the self-display switch 13 is turned on, and in this example, it switches to blinking after 7 seconds, then turns off once after 3 seconds, and then turns on again when the exposure ends. It is controlled so that it is turned on and finally turned off after the lens 6 has returned to its origin. In addition.

The selfie switch 13 provides a selfie photography or selfie mode request signal to the microcomputer 1, and is externally inputted by the user.

Since the self-display light emitting body 1o may be operated with the self-display switch 13 when the eye is close to the viewfinder 11, it is desirable to be able to see the light emission even when the viewfinder IIK is close to the eye. FIG. 6 is a horizontal cross-sectional view of the finder portion, showing a specific example of a configuration that makes it possible to check the light emission display of the self-display light emitter 1o while looking at the finder 11.

In FIG. 5, 11 is a finder and 12 is a strobe. The finder 11 includes an objective lens 1.11 held by a finder frame 110.

112 and an eyepiece lens 113. The self-display light emitter IO is provided between the finder 11 and the strobe 12, and its surface is covered with the diffuser plate 120 of the strobe 12, as described above. Finder frame 11
0 is formed with a light projection hole 114 that allows light to be projected into the finder 11 of the self-display light emitter 10. The light projection hole 114 communicates between the objective lens txt and 112 in this example. Note that the focus display light emitter 9 is provided near the eyepiece lens 113 as described above. According to such a configuration, even when operating the self-timer switch 13 in the eye-closed state, the light emission of the self-indication light-emitting body 10 can be confirmed through the objective lens 112 and the eyepiece lens 113, so that it is possible to know when the self-timer has started. .

The feature of the configuration shown in FIG.
The purpose is to establish One end of the light guide 115 opens near the self-display light emitter 10, and the other end passes through the finder frame 110 and opens toward the eyepiece 113. In FIG. 6, the same reference numerals as in FIG. 5 indicate the same components.

Returning to FIG. 2, 14 is a shirt release switch, which includes a first stage switch SPl and a second stage switch SP2. The first stage switch SPI is a microcomputer l
A start signal is given to the computer 1, which causes the computer 1 to perform exposure adjustment, focus adjustment, lighting control of the focus display light emitter 9, etc., as will be described later. The second stage switch SP2 provides a release signal to the microcomputer 1, which causes the computer 1 to perform self-photographing processing, exposure control, and lighting control of the self-display light emitter 10, as will be described later.

The microcomputer 1 has a CPU 10I, a memory 102 that contains a control program and fixed data, and temporarily stores necessary data, and an input/output interface 103, and has an AF control system 2. AE control system 3. Strobe control circuit 42 display drive circuit 5. It is connected to the self-switch 13 and the shirt release switch 14 via an input/output interface 103.

FIG. 7 and FIG. 8 are examples of operation flowcharts of the above structure, and the operation of the above structure will be explained below using these.

First stage switch SPI of shirt release switch 14
The control program starts with the power input, and after initialization and power hold for applying power to the system (step 20), AE non-processing and AF non-processing are entered (steps 21 and 22).

In the case of no AE processing, photometric information is taken in through the photometric element and exposure control circuit of the AE control system 3, and from this photometric information and form sensitivity, the Ev value is determined to determine whether or not it is necessary to use a strobe. Obtain exposure information and temporarily store it. The film speed is read in, for example, in step 20 when the cartridge is loaded. If it is determined that it is necessary to use a strobe, a strobe mode is set, exposure information corresponding to this mode is temporarily stored, and the main capacitor of the strobe control circuit 4 is charged.

As mentioned in the configuration explanation, AF-free processing scans the light emitting element for distance measurement from close range to infinity, captures the distance measurement information of the light receiving circuit written as a result, and uses this distance measurement information to determine the focus position. is calculated and determined, and the lens 6 is advanced and temporarily fixed at the focused position via the lens control mechanism. If the focus position cannot be obtained from the distance measurement information, that is, if the focus position is within close range, the lens 6 is not extended.

After such no AF processing, it is determined whether the distance to the subject is within close range (step 23).
), this judgment is made based on whether or not the in-focus position has been obtained from the distance measurement information; if the in-focus position is obtained, it is determined that it is at or above close range, and if not, it is determined that it is within close range. . If the distance is within close range, the focus display light emitter 9 is driven to blink via the display drive circuit 5 (step 24);
The user is warned that they are within close range.

This blinking continues as long as the first stage switch SPI is on, that is, is pressed by the user (step 25).
When the light is released, the light goes out (Stella 7'26). After the light goes out, the power hold is turned off (step 27), and the system function stops.

The user directly understands the need to further increase the distance between the subject and the subject based on the recognition from the blinking of the focus display light emitter 9, and then presses the first stage switch after increasing the distance. The SPI will have to be operated again. This will start the system anew.

On the other hand, if it is determined in step 23 that the distance is not within close range, the focus display light emitting body 9 is
lights up continuously (Step 28), the user is informed that the focus state has been achieved, and the shirt release switch 14 is turned on.
The camera waits for operation of the second stage switch SP2 (step 29). "When the user presses the second stage switch SP2, the focus display light emitter 9 turns off (step 30), and self-photography is started. Step 31: Determine whether or not a mode is requested (step 31).
). Selfie switch 1 determines whether or not self-shooting mode is requested.
Depending on the operation in step 3, pressing this button starts the self-photography mode. In this self-shooting mode, after the self-display light emitter 10 is continuously lit via the display drive circuit 5 (step 32), the process shifts to self-timer processing (
Step 33).

FIG. 8 is an example of an operation flowchart of self-timer processing. First, 7 seconds from the start of self-photography is regulated by, for example, a timer built into the microcomputer 1 (steps 330, 331), and during this time interval, self-display light is emitted. The body 10 is kept in a continuous lighting state. After the above 7 seconds have elapsed, the self-display light emitter 10 is switched to flashing lighting and (
Step 332), the timer is set to 3 seconds (Steps 333, 334), and after this time period has elapsed, the self-display light emitting body 10 is turned off (Step 335).

After such self-timer processing, exposure control is entered (
Step 34). Note that if the self-photographing mode is not requested, the process jumps to step 34 and exposure control is immediately performed. In the exposure control, the diaphragm shutter 7 is driven via the shutter control mechanism of the AE control system 3 according to the exposure information calculated in step 21, and the light emission timing and light emission time are controlled in the case of strobe mode. .

Step 35 following such exposure control is a judgment step for detecting the end of exposure, and this detection is performed, for example, by setting exposure information in a counter before starting exposure and counting down at the start of exposure. The start of exposure is recognized by the No determination in step 31 or the end of the self-timer process in step 33. At the end of this exposure, the self-display light emitter 10 is turned on again in step 3.
6) This notifies the person to be photographed that the exposure has ended. After the lens 6 extended to the focusing position is returned to its origin by the lens control mechanism (step 37), the self-display light emitting body 10 is turned off (step 38), and the power hold is turned off (step 39). ), the system stops functioning.

In the embodiment described above, the self-indicating light emitting body 10 is turned on to indicate the end of exposure even in situations other than self-photography, but it is of course possible to display the end of exposure only in the case of self-photography. It is possible. For example, if the determination of the self-photographing mode in step 31 is No, the control may be configured to use a separate flow excluding the lighting and extinguishing of the self-display light emitter 10.

[Effects of the Invention] As explained above, according to the present invention, a light emitting body for in-focus display gives a different display from an in-focus display and an out-of-focus display when the distance to the subject is within close range. At the same time, we decided to control the lighting of the self-indicating light emitter to indicate the end of exposure at least when taking self-photographs, so that the user can see that the distance to the subject is within close range. This allows for more appropriate shooting instructions to be given, as well as making the subject aware that the shooting has ended when taking self-shots, thereby preventing misunderstandings about the end of the shooting. Moreover, it is possible to provide a camera operation display device that can perform these displays without adding a conventional display light emitting body.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an operation display device according to the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, Fig. 3 is a diagram showing an example of arrangement of a light emitter for displaying focus, and Fig. 4 is Figures 5 and 6 are diagrams showing examples of the arrangement of the self-display light emitters, and Figures 7 and 8 are diagrams showing configuration examples for checking the light emitting state of the self-display light emitters through the finder, respectively. The figure is a diagram showing an example of the operation of the configuration of FIG. 2 and a flowchart. 1... Microcomputer 2... AF control system 3... AE control system 5... Display drive circuit 9.
...Light-emitting body for focus display 10...Light-emitting body for self-indication 11...Finder 12...Strobe
13...Self switch 14...Shirt release switch 110...Finder frame 11
4... Light projection hole 115... Light guide

Claims (6)

[Claims] (1) It has an automatic focus adjustment function, an automatic exposure adjustment function, and a self-shooting function, and when the automatic focus adjustment function achieves a focus state, the focus display light emitter displays the focus, and the self-shooting function In cameras that perform self-operation display using a self-indication light emitter, when the distance to the subject is within close range, it is detected based on the distance measurement information obtained by the automatic focus adjustment function, and the focus is determined by this detection. The lighting of the focus display light emitter is controlled so as to give a display different from the display and non-focus display, and the end of exposure is detected based on exposure information obtained through the automatic exposure adjustment function, and in this detection, at least A camera operation display device, characterized in that the lighting control of the self-indication light emitter is controlled to indicate the end of exposure during self-photography. (2) continuous lighting of the focus display light emitter in a focused state;
2. The camera operation display device according to claim 1, wherein the camera is turned off in an out-of-focus state and blinks within the close range. (3) The camera operation display device according to claim 1, wherein the self-display light emitting body is turned off once a timer ends during self-photography, and turned on again when exposure ends. (4) The camera operation display device according to claim 1, wherein the self-display light emitting body is configured to project light into the finder. (5) The camera operation display device according to claim 4, wherein a light projection hole is formed in the finder frame to introduce the light from the self-indication light emitting body into the finder. (6) The camera operation display device according to claim 4, wherein a light guide for guiding the light of the self-display light-emitting body is provided between the self-display light-emitting body and the inside of the viewfinder.