JPH0738065B2 - Equipment for display devices - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for a display device that displays a state of image blur occurring in an image forming device.

(Prior Art) In recent years, cameras have been equipped with an auto focus (AF) mechanism, an auto exposure (AE) mechanism, etc., and due to the functions of these mechanisms, shooting errors caused by operational problems such as exposure error and out of focus can be prevented. The problem has been greatly reduced.

However, since the camera usually takes a picture with a hand, there is a problem of failure in the picture taking due to camera shake, and this point remains as a problem that cannot be solved even by mounting the above mechanism.

The conventional measures that are considered for the failure to shoot due to camera shake are the only people who actually use the camera are the know-how (skills) in handling the camera that are actually transmitted from experienced people and experts. It is difficult to understand, and since various mechanisms such as the AF mechanism and AE mechanism described above are being installed in the camera, common sense knowledge necessary for shooting focal length, exposure, etc. There are increasing opportunities to use the camera even for children who do not have the ability to judge, and for this reason, measures to prevent shooting failures due to camera shake, which has been less common in the past, are required. -ing

In order to prevent such camera shake, as a means added to a camera for preventing it or giving a camera shake warning, conventionally,
For example, in some cases, the camera shake warning lamp lights up when the shutter speed is 1/30 seconds.

However, with such a uniform warning based on shutter speed standards, it is just a matter of caution, and it is up to the photographer to determine whether the camera in his hand actually suffers from camera shake that could lead to shooting failure. Can't judge. Therefore, there is an unavoidable drawback in that although appropriate shooting is actually possible, shooting may be stopped, or even if shooting is performed with caution, the resulting image may be blurred.

(Problems to be Solved by the Invention) The present invention draws attention to the image blur to the user by displaying the state of the image blur so that the user can easily grasp the state, and as a result, the image blur An object of the present invention is to provide a device for a display device that can prevent the occurrence.

(Means for Solving Problems) In order to achieve the above object, the present invention provides a device for a display device, which displays a state of image blur occurring in an image forming apparatus according to an output of a blur detecting means, A device having an amplifying unit for inputting an output of the blur detecting unit, amplifying the blur information detected by the blur detecting unit and outputting the amplified blur information to the display device, and enlarging and displaying the blur information on the display device. is there.

(Operation) According to the present invention, with the above configuration, the blur information is amplified and the blur information is enlarged and displayed on the display device so that the user can easily recognize the image blur state.

(Example) Hereinafter, the present invention will be described based on an example shown in the drawings.

FIG. 1 is a diagram showing an example of a schematic configuration of a camera with a camera shake display function according to the present invention. In this figure, 1 is an objective lens and 2 is an eyepiece lens, and these constitute a finder optical system. . Reference numeral 3 is an optical axis of this finder optical system. The reference numeral 9 designates a half mirror which is tilted in the optical path of the finder optical system.

Reference numeral 5 denotes a gyro arranged near the finder, which is suspended and supported by a gimbal mechanism 6, and a mirror 7 is attached to the tip of the gyro 5. The position of the mirror indicated by reference numeral 7 in the drawing is a reference position in which the camera is not tilted. In this example, the gyro and gimbal mechanism constitutes a tilting mechanism that detects tilting of the camera.

In order to set the mirror 7 to the reference position as described above, a means for locking (not shown) the axis of the gyroscope frame with the optical axis of the finder is usually provided. This can be given by rotating and starting the frame in advance, holding the camera toward the subject, and then performing the operation of releasing the lock. The control circuit that gives such a series of operations can be constructed by combining a microcomputer built into the camera and an appropriate switch that can be operated from the outside.

Reference numeral 8 is a point light source such as an LED fixed to a fixed portion of the camera body, and its light (light source light) is reflected by the mirror 7 on the front surface of the gyro and further reflected by the half mirror 9, and then the optical axis of the finder. The point light source image can be seen from the viewfinder through the eyepiece lens 2 in agreement with. The light source may be replaced by, for example, a lamp or a structure configured to illuminate with an external light.

In this example, the half mirror 12 is arranged in the middle of the mirror 7 and the half mirror 9, and the mark of the mark plate 13 fixed to the fixed portion of the camera body (in this example, it is shown in FIG. 2 centered on the finder optical axis). A circle mark 23) is displayed in the viewfinder. This mark 23 can be set, for example, as indicating the allowable range of the camera shake amount, which makes it easy to visually judge whether the camera shake is of a degree that does not hinder the actual shooting, It is also one of the goals of efforts to reduce camera shake during shooting. Further, in this example, the point light source that produces the light source image showing the state of the camera shake is also used as the illumination system of the mark 23. For this reason, the mirror 7'is provided around the mirror 7.
Are arranged so that the image of the mark plate 13 is projected on the finder screen 21 through the half mirrors 12 and 9.

Fig. 2 shows the finder screen 21. This finder screen
The circular mark 23 described above is displayed in the central portion of 21. If this mark is also used as the mark indicating the range of auto focus, the viewfinder becomes simple. Alternatively, the color may be changed.

When shooting is performed using the camera having the above configuration, the mirror 7 supported by the gyro 5 is in a posture perpendicular to the finder optical axis at the reference position shown in the figure, and is locked with the camera body. Is released, the gyro 5 supported by the above-described gimbal mechanism 6 continues to maintain a posture in which its axis is maintained in a constant direction with respect to absolute space even if the camera tilts. .

Therefore, if the camera vibrates or is angularly displaced in this state, relative tilting occurs between the camera body and the mirror 7. Then, this relative tilting appears as a movement of the light source light image 22 which is a projected image of the point light source 8 on the finder screen 21. The random locus shown inside the circular mark 23 in the central portion of the finder screen 21 and in the vicinity thereof in FIG. 2 shows an example of the movement of the light source light image 22. This movement can be enlarged and displayed on the finder screen 21 according to the set dimensions between the point light source 8, the mirror 7 and the eyepiece 2, etc. To make it easier for the photographer to grasp the camera shake.

Since the movement trajectory of the light source image 22 becomes difficult to see when the finder screen is bright, in a practical example, the brightness of the outside world is measured using, for example, a photometric system (not shown) and is proportional to the brightness. It is preferable to adjust the brightness by changing the current flowing through the LED, which is a point light source.

FIG. 3 shows another embodiment of the present invention, and the configurations of the objective lens 1, the eyepiece lens 2 and the half mirror 9 are the same as those of the embodiment shown in FIG. The structural features of this example are:
A lens 33 is coupled by an arm 32 to a gyro 31 supported by a gimbal mechanism (not shown), and light from a point light source 8 such as an LED is projected by a negative lens mirror 34 and then a projection lens 35 to produce a first image.
As in the case of the example in the figure, the half mirror 9 is introduced into the finder optical path.

In such a configuration, when camera shake occurs, the axis of the gyro 31 and thus the axis of the lens 33 tilts with respect to the finder optical system, and the light source light is deflected by the negative lens, so that the light source image on the viewfinder screen is deflected. Will move on the viewfinder screen. The lens 33 may be a negative lens or a positive lens.
You can select the magnification of camera shake by the length of the
You can select the enlargement ratio of camera shake with the afocal magnification of.

If the shooting lens has a variable magnification, the projection lens can be used as a variable power system as shown in the figure to change the magnification, and if the telephoto mode is used, the size of the camera shake can be enlarged and projected. It is also possible to warn the occurrence of camera shake within the permissible camera shake allowable limit corresponding to the deflection.

The projection lens 35 described above can also be arranged in the optical path of the finder optical system, and in this case, the finder optical system is configured as a variable power system and at the same time, a mechanism for changing the magnification of the camera shake. Can also be configured as.

In the present embodiment, the frame of the finder and the mark for allowing the camera shake are displayed by the Arbata type in which the figure drawn on the inner surface of the eyepiece lens is reflected on the inner surface of the objective lens 1.

In the embodiment shown in FIG. 4, the point light source 8 is suspended by a spring or the like, and introduced from the projection lens 42 through the mirror 34 into the optical path of the finder optical system. Also in this example, the shaking of the light source occurs due to the camera shake occurring in the camera, which causes the movement of the light source image on the viewfinder screen, and the camera shake trajectory can be observed on the viewfinder screen. An appropriate lock device for locking the swing of the light source suspended by a spring before starting the photographing operation may be provided.

The present invention is not limited to the configuration of the above-described embodiment in which the member for directly deflecting the optical path is driven by the gyro as described above. For example, the camera is provided with means for detecting camera shake, such as an acceleration sensor, It goes without saying that a method of driving the optical path deflecting member via an actuator driven by this output may be adopted, and the output of the camera shake detection means as described above may be used to obtain an image of a photographing optical system such as a variable apex angle prism. The deflecting means may be a display of a device that is driven by an actuator to perform image stabilization. In this case, it is preferable that the amount of image blur corrected by image stabilization is corrected by the finder and displayed.

INDUSTRIAL APPLICABILITY The present invention as described above can be applied as an apparatus for displaying a viewfinder such as a lens shutter camera, a single-lens reflex camera, a still video camera, a video camera, etc., and the focal length is changed by switching the lens or a zoom lens is used. In this case, it is practically preferable to employ a unit for detecting focal length information so as to change the enlargement ratio of the camera shake locus correspondingly. Instead of changing the magnification of the camera shake locus, the magnification of the mark indicating the allowable range can be changed on the viewfinder, and the mark chart can be electrically changed by configuring it with a liquid crystal. The size of the frame may be changed mechanically or the display magnification of this mark may be changed.

Needless to say, the display may be stopped by electrically turning off the light source if the display becomes an obstacle when the display of the camera shake is not necessary.

Further, the camera shake has different movements when the shutter button is pressed in addition to holding the camera. However, the present invention is effective for a request to confirm the camera shake state at the time of such a shutter. There is also a feature that can be dealt with. That is, for example, if a means such as a manual switch for releasing the interlocking of the shutter mechanism by operating the shutter button is provided and the camera shake state when the shutter operation is performed in this released state can be confirmed with the viewfinder, Can be dealt with conveniently.

(Correspondence between Invention and Example) In the above example, the gyro 5, the gimbal mechanism 6,
The mirror 7 serves as the blur detecting means of the present invention, and the viewfinder screen 21
Corresponds to the display device of the present invention, and the optical path length from the mirror 7 to the eyepiece 2 or the arm 32, the lens 33, or the projection lens 35 corresponds to the amplification means of the present invention.

(Effects of the Invention) As described above, according to the present invention, the user can easily recognize the state of image blur, so that the user is alerted of the image blur, and as a result, the occurrence of image blur is prevented. It can be effectively prevented.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a schematic configuration of a camera with a camera shake display function to which the present invention is applied, and FIG. 2 is a diagram for explaining a deflection state of a light source light appearing in a viewfinder, FIGS. FIG. 4 is a diagram showing a schematic configuration of another embodiment of the present invention. 1 ... Objective lens, 2 ... Eyepiece lens 3 ... Viewfinder optical axis 5 ... Gyro, 6 ... Gimbal mechanism 7 ... Mirror, 7 '... Fixed mirror 8 ... Point light source, 9 ... Half mirror 11 ... Frame plate, 12 ... Half mirror 13 … Mark plate

Claims (1)

[Claims] 1. An apparatus for a display device for displaying a state of image blurring occurring in an image forming apparatus in accordance with an output of a blur detecting means, the output of the blur detecting means being inputted and detected by the blur detecting means. An apparatus for a display device, comprising: an amplifying unit that amplifies the shake information and outputs the amplified shake information to the display device to enlarge and display the shake information on the display device.