JPH0635054A - Display device for camera with correcting means - Google Patents

Abstract

PURPOSE:To reset a position indicated with a rotary needle to a correct position when a control state and the position indicated with the rotary needle do not coincide by driving an indicating member without changing the control state of a camera. CONSTITUTION:When the rotary needle is not in a reference position, reset switches SW1-SW3, and SW7 are depressed, to forcibly rotate the rotary needle in a state where the control state of the camera is kept in a reference state. When the rotary needle obtains the reference position, a reset switch SW6 is turned off, so that the control state of the camera and the display position of a display part are corrected so as to match in the reference state. Further, when a detecting switch SW 5 is turned off, the control state of the camera is set in the control state stored before a change, and the rotary needle of the display part is driven in accordance with the set. As a result, the control state of the camera and the display state of the display part are corrected so as to match.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a camera driven by an electric drive device.

[0002]

2. Description of the Related Art A display device for a camera having an electric drive means is disclosed, for example, in Japanese Patent Application No. 3-21461 by the present applicant.
There are three. The display device according to the above application is configured to perform display by a rotating needle, and includes a number-of-shots display unit that indicates the number of shots, a strobe display unit that indicates a flash emission mode, and a self-display unit that indicates a self-timer mode. It consists of three.

The rotary needle of each display section is driven by a stepping motor. The stepping motor is driven by an instruction from the CPU, and the rotary needle is rotationally driven by the stepping motor. According to the conventional display device as described above, the stepping motor malfunctions due to a shock being given to the camera during operation, a sudden failure due to strong electromagnetic waves, a sudden failure of the power supply device, etc. If it deviates from the position, after that, the operation is performed in the deviated state, and an accurate instruction cannot be given.

For example, if the stepping motor malfunctions due to the above shock when the display unit for displaying the number of frames of film indicates the tenth film, and the command for the eleventh film is deviated, thereafter. It will be counted as 12 and 13 and you will not know the exact number of pieces. Moreover,
Even if the film is rewound and taken out after shooting, C
Since the PU reversely rotates the stepping motor by the number of photographed frames, the display unit remains misaligned, and the first sheet is displayed although the 0th sheet should be displayed.

[0005]

In order to solve the above problems, in the present invention, when the control state of the camera and the position indicated by the rotary needle of the display unit do not match, the position indicated by the rotary needle. It is an object of the present invention to provide a display device for a camera that can return the camera to the correct position.

[0006]

In order to achieve the above object, the present invention shows a control section of a camera such as an exposure control mode and the number of frames to be photographed, and a display section having an instruction member driven by an electric drive means, The display device of the camera is configured to have setting changing means for changing the control state of the camera and driving the pointing member, and electric drive control means for driving the pointing member without changing the control state of the camera.

[0007]

1 to 4 show an embodiment of a display device of a camera according to the present invention. FIG. 1 is an overall view of a camera according to an embodiment of the present invention with a back cover opened. FIG. 2 is a diagram showing a display device of a camera which is an embodiment of the present invention. 3 is a block diagram of a camera system which is an embodiment of the present invention, and FIG. 4 is a flowchart showing the operation of the CPU in the block diagram.

First, the structure of the camera of this embodiment will be described with reference to FIG. On the upper surface of the camera body 1, a display device 2, an exposure correction value instruction switch SW1 used when selecting an exposure correction value setting, and a focus state selection switch SW2 used when selecting a focus adjustment mode. When,
The flash selection switch SW3 used to select the flash firing mode, the change switch SW4 used to change the numerical value of the mode selected by the switches SW1 to SW3, and the frame number correction switch SW7 used to correct the number of frames is set up.

When the back lid of the camera is opened, a detection switch SW5 for detecting the opening of the back lid and CP
A return switch SW6 is provided for returning the position designated by the rotary needle to the correct position when the position designated by U and the position actually designated by the rotary needle do not match. Next, the display device 2 shown in FIG. 1 will be described in detail with reference to FIG.

In the display section of the number-of-frames display section 31 showing the number of frames to be photographed, an exposure correction display section 41 showing the exposure correction amount, a focus display section 51 showing the focus state, and a strobe display section 61 showing the flash emission mode. And are provided. The photographic frame number display section 31 can display the photographic frame number of the film up to 60, and FIG. 2 shows that the 14th frame is currently being photographed.

The exposure compensation display unit 41 displays the compensation amount of the exposure compensation performed at the time of backlighting or the like by the non-compensation display 43 and the one-step over display 44.
And one-level under display 46 is displayed.
B means a valve mode 47 in which exposure is performed while the release button is pressed. FIG. 2 shows that the state is set without exposure compensation. Focus status display
Reference numeral 51 indicates the focus adjustment state, and AF mode display for focusing by autofocus
53, a distant view mode display 54 that fixes the focus to infinity,
The normal focus mode display 55 for fixing the focus to 3 meters, which is frequently used, is displayed, and FIG. 2 shows that the auto focus is set.

The strobe display unit 61 is adapted to display a strobe light emission mode, and automatically flashes when it is dark 63, an auto flash display 63 that prohibits light emission, and a compulsory light emission. Forced flash display 65 for
This is displayed by the pre-flash display 66 that performs preliminary flash before shooting to reduce red-eye. FIG. 2 shows that the auto flash state is set.

A rotating needle 70a is provided at the center of each display.
.About.70d are installed, and the rotary needles are all driven by independent stepping motors (not shown). The correction amount of exposure correction, the focus adjustment state, and the flash emission mode can be changed according to the photographer's intention. The photographer makes the change by pressing the change switch SW4 after selecting the mode to be changed with the switches SW1 to SW3.

A change in the exposure correction amount can be selected by pressing the switch SW1. Then, the exposure compensation amount can be changed by operating SW4 while pressing the switch SW1. When the above operation is performed once from the state of FIG. 2, the exposure correction display unit displays the correction amount of one step over. When the operation is repeated, the mode switches to valve mode, one step under, no correction, and cyclic. The exposure compensation amount is set by the photographer turning off the switch SW1.

When the switch SW2 is pressed, it is possible to select the change of the focus adjustment state. Then, the focus adjustment state can be changed by operating SW4 while pressing the switch SW2. When the above operation is performed once from the state of FIG. 2, the focus state display section displays the distant view mode. Repeated operation switches to normal focus mode, auto focus and cyclic. The focus adjustment state is set by the photographer turning off the switch SW2.

By operating the switch SW3, the flash emission mode can be changed. And switch SW3
The flash firing mode can be set by operating SW4 while pressing.
You can change the mode. When the above operation is performed once from the state of FIG. 2, the strobe display section displays the light emission prohibition mode. Repeat the operation to set the flash mode, preflash mode.
Mode, auto flash mode and cyclic. When the photographer turns off SW3, the flash firing mode changes.
Mode is set.

The rotating needle of the number-of-photographing frame display section has a reference position of 0, and the rotating needles of the other display sections have the reference position in the state of FIG. Each control state of the camera is based on the number of frames 0, no exposure compensation, auto focus, auto flash state.Each time the control state is changed, the state is stored in the memory in the CPU. There is. When the detection switch SW5 detects that the back cover is opened, the CPU restores the camera control state to the reference state and drives each rotary needle.

As described above, when the stepping motor malfunctions due to shock being applied to the camera during use, sudden damage due to strong electromagnetic waves, sudden failure of the power supply device, etc. Since the display position is different, even if the control state of the camera returns to the reference state by the CPU, the display unit will not return to the reference position.

Therefore, when the rotary hands are not in the reference positions shown in FIG. 2 when the back lid is opened, the photographer presses the return switch SW6 while pressing the switches SW1 to SW of the respective display sections.
3. By pressing the switch SW7, the stepping motor can be driven by the number of times of pressing and the rotary needle can be forcibly rotated while keeping the control state of the camera at the reference state. This rotation may be either left or right.

Then, by turning off the return switch SW6, the display position at that time becomes a new reference position. That is, the photographer presses the return switch SW6 and presses the switches SW1 to SW3 and the switch SW7 of each display section to change the display position, and when the rotary needle reaches the reference position, the return switch SW6 is turned off. The control state of the camera and the display position of the display unit are corrected so as to match in the reference state.

When the detection switch SW5 is turned off, the control state of the camera is set to the control state stored before the change, and the rotary needle of the display unit is driven in accordance with the control state. As a result, the control state of the camera and the display state of the display unit are corrected to match. FIG. 3 is a block diagram of the camera system of this embodiment.

Output signals from the exposure correction value instruction switch SW1, the focus state selection switch SW2, the flash selection switch SW3, the change switch SW4, the detection switch SW5, and the return switch SW6 are input to the CPU. The output signal from the CPU is the frame number display section 31, the exposure correction display section 41, and the focus display section.
It is input to the stepping motor 81 for the number of frames, which drives the rotating needles of the 51 and the strobe display section 61, the stepping motor 82 for exposure compensation, the stepping motor 83 for focus display, and the stepping motor 84 for strobe display.

Next, the operation of the CPU shown in FIG. 3 will be described with reference to FIG.
This will be described with reference to the flowchart of In this flowchart, it is assumed that the control state of the camera is stored at the time of start. When it is detected in step S101 that the detection switch SW5 is turned on, step S102
Then, the control state of the camera is set to the reference state, and a signal is output to each of the stepping motors 81 to 84 to rotate the rotary needles accordingly, and the process proceeds to step S103.

In step S103, if it is detected that the return switch SW6 is turned on, the process proceeds to step S104, and if not, the process proceeds to step S110. In step S104,
Input the output signal from the exposure compensation value instruction switch SW1,
If it is detected that the switch is turned on, the process proceeds to step S111, and if not, the process proceeds to step S105.

In step S111, an output signal is output to the exposure compensation stepping motor 82 so as to change the display of the exposure compensation display section by the number of times the exposure compensation value instruction switch SW1 detected in step S104 is pressed. Proceed to S104. In step S105, the output signal from the focus state selection switch SW2 is input, and if it is detected that it is turned on, the process proceeds to step S112, and if not, the process proceeds to step S106.

In step S112, an output signal is output to the focus state stepping motor 82 so as to change the display of the focus state display portion by the number of pressing times of the focus state selection switch SW2 detected in step S105, and step S104. Proceed to. In step S106, the output signal from the strobe selection switch SW3 is input, and if it is detected that it is turned on, the process proceeds to step S113, and if not, the process proceeds to step S107.

In step S113, an output signal is output to the strobe stepping motor 83 so as to change the display of the strobe display portion by the number of times the strobe selection switch SW3 detected in step S106 is pressed, and the process proceeds to step S104. In step S107, the output signal from the frame number correction switch SW7 is input, and if it is detected that the switch is turned on, the process proceeds to step S114, and if not, the process proceeds to step S108.

In step S114, the step count motor 84 for the number of pieces is changed so as to change the display of the number of pieces display section by the number of pressing times of the number of pieces correction switch SW7 detected in step S107.
The output signal is output to and the process proceeds to step S104. Step S1
At 08, the output signal from the return switch SW6 is input, and if it is detected that the switch is turned off, the process proceeds to step S109, and if not, the process proceeds to step S104.

In step S109, the control state of the camera is returned to the stored state, a signal is output to each of the stepping motors 81 to 84 in accordance therewith, the rotary needle is rotated, and the process ends. In this embodiment, the return switch for returning the control state of the camera to the reference state is provided inside the camera, but it can be attached to the outside of the camera so that it can be corrected without opening the back cover.

By doing so, it is possible to confirm whether or not the correct display is being performed even while the film is being photographed.

[0031]

As described in detail above, according to the present invention,
It is possible to provide a display device of a camera capable of returning the position indicated by the rotating needle to the correct position when the position indicated by the CPU and the position actually indicated by the rotating needle of the display unit do not match. .

[Brief description of drawings]

FIG. 1 is an overall view of a camera according to an embodiment of the present invention in a state where a back cover is opened.

FIG. 2 is a diagram showing a display device of a camera that is an embodiment of the present invention.

FIG. 3 is a block diagram of a camera system according to an embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the CPU in FIG.

[Explanation of symbols for main parts]

 SW1-Exposure correction value instruction switch SW2-Focus state selection switch SW3-Strobe selection switch SW4-Change switch SW5-Detection switch SW6-Return switch SW7-Shooting frame number correction switch

Claims (3)

[Claims] 1. A display unit which shows a control state of a camera such as an exposure control mode and the number of frames to be photographed, and which has an instruction member driven by an electric drive unit, and the control state of the camera is changed to drive the instruction member. A display device for a camera, comprising: a setting changing unit that controls the electric power; and an electric drive control unit that drives the pointing member without changing a control state of the camera. 2. The display device for a camera according to claim 1, further comprising reference state setting means for setting a control state of the camera to a predetermined reference state, wherein the electric drive control means sets the reference state setting means. When the control state of the camera is in the reference state,
A display device for a camera, characterized in that the pointing member is driven without changing the control state of the camera. 3. The display device for a camera according to claim 2, wherein the storage unit stores the control state of the camera, and the control unit stores the control state of the camera in the reference state by the setting of the reference state setting unit. And a return means for returning to the controlled state of the camera.