JPH0792544A - Display device of camera - Google Patents

Abstract

PURPOSE:To eliminate such a state that a painter is not rotated at the time of some rotating direction of a set dial and to improve operability by rotating the pointer which is rotated in one direction only in a prescribed direction according to the rotating quantity of the set dial even through the set dial is rotated in any direction. CONSTITUTION:A display part for the number of frames 12 is constituted of the almost circular dial 12a and the pointer 12b driven to be rotated only in one direction on the dial 12a. On the dial 12a, the indexes of Er 36 frames and an index 12c showing a self-timer mode are arranged. When a command dial is rotated while a self-mode button is depressed, the pointer 12b of the display part 12 is rotated according to the rotating quantity of the command dial and the self-timer mode of the index 12c is set. At this time, the pointer 12b of the display part 12 is normally rotated according to the command of the rotating quantity regardless of the command of the rotating direction of the painter included in a pulse signal by controlling a driving circuit. Besides, the pointer 12b is driven to be rotated only in one direction by the driving circuit and a stepping motor for displaying the number of frames.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device of a camera for displaying various information.

[0002]

2. Description of the Related Art A display device of a camera is known which displays various kinds of information on a scale plate by a pointer which is rotationally driven by an electric drive source (for example, Japanese Patent Laid-Open No. 5-150).
307). With this type of camera display,
An index indicating various information is placed on the scale plate, and the pointer is rotated clockwise or counterclockwise by operating the clockwise or counterclockwise button to indicate the desired index. The information corresponding to is set.

By the way, among various kinds of information of the camera, for example, the number of frames to be photographed can be displayed by rotating a pointer in only one direction on a scale plate having an index of 0 to 36 frames. In the display device for displaying, the driving circuit can be simplified.

However, in such a display device having a pointer which is rotationally driven only in one direction, the pointer rotates when the clockwise rotation button is pressed, but the pointer does not rotate when the counterclockwise rotation button is pressed. The problem arises.

It is an object of the present invention to provide a display device for a camera which rotates a pointer only in one direction according to the rotation amount of a setting dial regardless of the rotation direction.

[0006]

The present invention will be described with reference to FIG. 1 showing an embodiment. In the invention of claim 1, the scale plate 12a is driven to rotate in only one direction by an electric drive source. Display means 1 for displaying various information by the pointer 12b
2 and a setting dial capable of reversing forward and backward for changing the indicated position of the pointer 12b and setting various kinds of information, and no matter which direction the setting dial is turned, the electric drive source is set in accordance with the rotation amount. A control means for rotating the pointer 12b only in a predetermined direction is provided, thereby achieving the above object. The invention according to claim 2 further comprises a first display means 12 for displaying various information on a scale plate 12a by a pointer 12b which is rotationally driven only in one direction by an electric drive source, and the scale plate 1.
Second display means 11, 13, 14 for displaying various information on pointers 11b, 13b, 14b which are forward-reverse driven by an electric drive source on 1a, 13a, 14a, and first display means 12 or second. A forward / reverse setting dial for changing the indicated positions of the pointers 11b to 14b of the display units 11, 13 and 14 and setting various information, the first display unit 12 and the second display units 11, 13, When the selecting means for selecting the display means for changing the pointing position of the pointer and setting the various information from 14 and the first display means 12 are selected by this selecting means, the setting dial moves in either direction. Even when rotated, the pointer 12b of the first display means 12 is rotated only in a predetermined direction by the electric drive source according to the rotation amount, and the second display means 11, 1 is selected by the selection means.
When 3 or 14 is selected, a control means for rotating the pointers 11b, 13b, 14b of the second display means 11, 13, 14 in the forward and reverse directions according to the rotation direction and the rotation amount of the setting dial is provided. , To achieve the above purpose.

[0007]

In the display device for a camera according to the first aspect of the present invention, no matter which direction the setting dial is turned, the electric drive source rotates the unidirectionally rotating pointer only in a predetermined direction according to the amount of rotation. As a result, the pointer does not rotate depending on the rotating direction of the setting dial, and the operability can be improved. Further, in the display device for a camera according to claim 2, the pointer, which is rotationally driven only in one direction, is rotated only in a predetermined direction according to the amount of rotation of the dial regardless of which direction the dial is rotated. The driven pointer is normally or reversely rotated depending on the rotation direction and the rotation amount of the setting dial. As a result, the unidirectional rotation pointer does not rotate depending on the rotation direction of the setting dial, and the pointer that can be rotated in the forward and reverse directions rotates according to the rotation direction and rotation amount of the setting dial, so that the user does not feel uncomfortable. , Operability is improved.

Incidentally, in the section of means and action for solving the above problems for explaining the constitution of the present invention, the drawings of the embodiments are used for the purpose of making the present invention easy to understand. It is not limited to.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a display device of one embodiment, FIG. 2 is a perspective view of a camera equipped with the display device of one embodiment, and FIG.
2 is a top view of the camera shown in FIG. In FIG. 1, a display unit 1 of the camera includes a shooting distance display unit 11 for displaying shooting distances in an auto focus mode and a manual focus mode, a frame number display unit 12 for displaying a shooting frame number and a self-timer mode, and an exposure correction. An exposure correction display unit 13 for displaying a value and an aperture display unit 14 for displaying an aperture value in the program automatic exposure mode and the aperture priority automatic exposure mode are provided.

The photographing distance display section 11 is a semicircular scale plate 11.
a and a pointer 11b driven in the reverse direction on the scale plate 11a
An index indicating a shooting distance from 0.4 m to infinity and an index 11c indicating an autofocus mode are arranged on the scale plate 11a. In the following, the clockwise rotation direction of the pointer will be referred to as forward rotation, and the counterclockwise rotation direction will be referred to as reverse rotation. The frame number display section 12 includes a substantially circular scale plate 12a and the scale plate 12
It is composed of a pointer 12b which is rotationally driven in only one direction on a, and indexes E to 36 frames and an index 12c indicating the self-timer mode are arranged on the scale plate 12a. The exposure correction display unit 13 is composed of a substantially semicircular scale plate 13a and a pointer 13b which is driven in the forward and reverse directions on the scale plate 13a, and an index indicating an exposure correction value of +2 to -2 on the scale plate 13a. Are placed. Further, the diaphragm display unit 14 includes a semicircular scale plate 14a and a pointer 1 which is driven on the scale plate 14a in the forward and reverse directions.
4b, and F2.8 to F22 on the scale plate 14a.
Aperture value index and index 1 indicating the program automatic exposure mode
4c is arranged.

The display 1 is provided on the upper surface of the camera body 2 as shown in FIGS. Reference numeral 3 is a taking lens. On the upper surface of the camera body 2, in addition to the display 1, a mode selector 4 for setting various exposure modes and the pointers 11b to 14b of the display 1 are rotated to indicate a desired index, and various information is displayed. Command dial 5 to set
An AF mode button 6, a self mode button 7, an exposure correction button 8, and a release button 9 are provided. When the mode selector 4 is set to the index P, the program automatic exposure mode is set, and when it is set to the index A, the aperture priority automatic exposure mode is set.

When the command dial 5 is turned while the AF mode button 6 is being pressed, the pointer 11b of the photographing distance display section 11 is rotated according to the rotation direction and the rotation amount of the index dial 11c in the auto focus mode or the manual focus mode. It is possible to set an arbitrary shooting distance in the range from a close-up distance of 0.4 m to infinity. When the command dial 5 is turned while pressing the self-mode button 7, the pointer 12b of the frame number display section 12 is rotated according to the amount of rotation, and the self-timer mode of the index 12c can be set. When the command dial 5 is turned while pressing the exposure correction button 8, the pointer 13b of the exposure correction display section 13 is rotated according to the rotation direction and the rotation amount, and the exposure correction value can be set. When the mode selector 4 is aligned with the index P, the program automatic exposure mode is set, and the pointer 14b of the aperture display unit 14 is rotationally driven to the program automatic exposure mode index 14c. When the mode selector 4 is adjusted to the index A, the aperture priority automatic exposure mode is set, and when the command dial 5 is turned, the pointer 14b is rotated according to the rotation direction and the rotation amount, and the aperture is set in the range of F2.8 to F22. Can be set.

FIG. 4 is a block diagram showing the structure of an embodiment. In the figure, 4p and 4a are switches that open and close in conjunction with the mode selector 4.
Is set to the index P, the switch 4p is closed, and when the mode selector 4 is set to the index A, the switch 4a is closed. Reference numeral 6a is a switch that opens and closes in conjunction with the AF mode button 6 and closes when the AF mode button 6 is pressed. Reference numeral 7a is a switch that opens and closes in conjunction with the self-mode button 7, and closes when the self-mode button 7 is pressed. Reference numeral 8a denotes a switch that opens and closes in conjunction with the exposure compensation button 8 and closes when the exposure compensation button 8 is pressed. Reference numeral 5a is a pulse generator that rotates in conjunction with the command dial 5, and outputs a pulse signal according to the rotation direction and rotation amount of the command dial 5. Drive circuit 11k-1
Reference numeral 4k is a drive circuit that drives stepping motors 11m to 14m that rotationally drive the pointers 11b to 14b of the display units 11 to 14, respectively. The drive circuit 12k and the stepping motor 12m for the frame number display unit 12 are the pointer 12
Rotate b in only one direction. Reference numeral 10 is a control circuit composed of a microcomputer and its peripheral parts, and rotationally drives the pointers 11b to 14b of the display 1 based on information from the switches 6a to 8a and the pulse generator 5a.

5 to 8 are flowcharts showing a control program executed by the control circuit 10. The operation of the embodiment will be described with reference to these flowcharts. FIG. 5 is a flowchart showing the focus adjustment program. The microcomputer of the control circuit 10 starts executing this control program when the AF mode button 6 is pressed and the switch 6a is closed. In step S1, it is determined whether or not the command dial 5 is turned to input a pulse signal from the pulse generator 5a. If a pulse signal is input, the process proceeds to step S2, and if not, the process proceeds to step S8. As described above, the pulse signal includes the pointer rotation direction command and the rotation amount command.

In step S2, the input pulse signal is checked to determine whether it is a normal rotation command. If it is a normal rotation command, the process proceeds to step S3, the drive circuit 11k is controlled, and the photographing distance display section 11 is displayed. The pointer 11b is normally rotated according to the rotation amount command. On the other hand, if it is a reverse rotation command, the process proceeds to step S4, and the drive circuit 11k is controlled to reverse the pointer 11b of the photographing distance display unit 11 according to the rotation amount command. Next, in step S5, the pointer 11b is set to the autofocus mode index 1
It is determined whether or not it has been driven to the position 1c, and the index 11c
When driven to the position of, the process proceeds to step S6 to set the auto focus mode. On the other hand, the pointer 11b is 0.4
If the range is set from the closest distance of m to the infinite distance, the process proceeds to step S7 to set the manual focus mode and the shooting distance corresponding to the position indicated by the pointer 11b. In the autofocus mode,
The distance is measured by a distance measuring device (not shown), and the focus of the photographing lens 3 is adjusted based on the photographing distance as a result of the distance measurement. On the other hand, in the manual focus mode, the focus of the photographing lens is adjusted based on the photographing distance set by changing the pointing position of the pointer 11b by the command dial 5. In step S8, it is determined whether or not the AF mode button 6 is released and the switch 6a is opened. If the AF mode button 6 is opened, the execution of the program is terminated. If the AF mode button 6 is still pressed, the process returns to step S1 and the above is executed. Repeat the process.

FIG. 6 is a flow chart showing a self-mode setting program. In the microcomputer of the control circuit 10, the self-mode button 7 is pressed and the switch 7 is pressed.
When a is closed, execution of this control program is started.
In step S11, it is determined whether or not the command dial 5 is turned and the pulse signal is input from the pulse generator 5a. When the pulse signal is input, the process proceeds to step S12, and if not, the process proceeds to step S15. Step S
At 12, the drive circuit 12k is controlled to normally rotate the pointer 12b of the frame number display unit 12 according to the rotation amount command regardless of the rotation direction command of the pointer included in the pulse signal. In a succeeding step S13, it is determined whether or not the pointer 12b has been driven to the position of the self-timer mode index 12c, and the index 12b
If it is driven to the position of c, the process proceeds to step S14 to set the self-timer mode, otherwise, to step S14.
Proceed to 15. In step S15, it is determined whether or not the self-mode button 7 is released and the switch 7a is opened. If the switch 7a is opened, execution of the program is ended. If not, the process returns to step S11 to end the above process.

FIG. 7 is a flow chart showing an exposure correction program. The microcomputer of the control circuit 10 starts execution of this control program when the exposure correction button 8 is pressed and the switch 8a is closed. Step S2
In 1, the command dial 5 is turned to determine whether or not a pulse signal is input from the pulse generator 5a. If a pulse signal is input, the process proceeds to step S22, and if not, the process proceeds to step S26. In step S22, the input pulse signal is checked to determine whether it is a normal rotation command. If it is a normal rotation command, the process proceeds to step S23, the drive circuit 13k is controlled, and the pointer 13b of the exposure correction display unit 13 is controlled. Is normally rotated according to the rotation amount command. On the other hand, if it is a reverse rotation command, the process proceeds to step S24, and the drive circuit 13k is controlled to reverse the pointer 13b of the exposure correction display unit 13 according to the rotation amount command. In step S25, the exposure correction value corresponding to the indicated position of the pointer 13b is set, and in the following step S26, it is determined whether or not the exposure correction button 8 is released and the switch 8a is opened. Finished,
If not, the process returns to step S21 to end the above process.

FIG. 8 is a flow chart showing the aperture setting program. In the microcomputer of the control circuit 10, the mode selector 4 is set to the index A and the switch 4 is set.
When a is closed, execution of this control program is started.
In step S31, it is determined whether or not the command dial 5 is turned to input the pulse signal from the pulse generator 5a. If the pulse signal is input, the process proceeds to step S32, and if not, the process proceeds to step S37. Step S
In 32, the input pulse signal is checked to determine whether it is a forward rotation command, and if it is a forward rotation command, the process proceeds to step S33, the drive circuit 14k is controlled, and the pointer 14b of the aperture display unit 14 is rotated. Rotate forward according to the quantity command. On the other hand, if it is a reverse rotation command, the process proceeds to step S34, and the drive circuit 14k is controlled to reverse the pointer 14b of the aperture display unit 14 according to the rotation amount command. Next, in step S35, an aperture value corresponding to the indicated position of the pointer 14b is set, and then in step S36.
Then, a shutter mechanism section (not shown) is controlled to perform a photographing operation. In step S37, the mode selector 4 sets the index A.
It is determined whether or not the switch 4a is set to any other position and the switch 4a is opened. If the switch 4a is opened, the program execution is terminated. If not, the process returns to step S31 to repeat the above process.

In the structure of the above embodiment, the frame number display section 12 serves as the display means and the first display means, and the shooting distance display section 11, the exposure correction display section 13 and the aperture display section 14 serve as the second display section. , Command dial 5 sets the setting dial,
The mode selector 4, the AF mode button 6, the self-mode button 7, and the exposure correction button 8 constitute a selection means, and the control circuit 10 constitutes a control means.

[0020]

As described above, according to the invention of claim 1, no matter which direction the setting dial is rotated, the pointer is rotated only in a predetermined direction by the electric drive source according to the rotation amount. As a result, the pointer will not rotate depending on the rotation direction of the setting dial,
Operability can be improved. According to the second aspect of the present invention, no matter which direction the dial for setting the unidirectional rotation is turned, it is rotated only in the predetermined direction according to the amount of rotation, and the dial for setting the pointer that can be rotated in the forward and reverse directions is set. Since it rotates normally or reversely depending on the rotation direction and the amount of rotation, the unidirectional rotation pointer does not rotate depending on the rotation direction of the setting dial. Since it rotates just as it is operated, the user does not feel uncomfortable and the operability is improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a display according to an embodiment.

FIG. 2 is a perspective view of a camera including a display device according to an embodiment.

FIG. 3 is a top view of the camera shown in FIG.

FIG. 4 is a block diagram showing a configuration of an example.

FIG. 5 is a flowchart showing a focus adjustment program.

FIG. 6 is a flowchart showing a self-mode setting program.

FIG. 7 is a flowchart showing an exposure correction program.

FIG. 8 is a flowchart showing an aperture setting program.

[Explanation of symbols]

 1 display device 2 camera body 3 shooting lens 4 mode selector 4p, 4a switch 5 command dial 5a pulse generator 6 AF mode button 6a switch 7 self-mode button 7a switch 8 exposure compensation button 8a switch 9 release button 10 control circuit 11 shooting distance Display unit 11a to 14a Scale plate 11b to 14b Pointer 11c Autofocus mode index 11k to 14k Drive circuit 11m to 14m Stepping motor 12 Frame number display unit 12c Self-timer mode index 13 Exposure correction display unit 14 Aperture display unit 14c Program automatic exposure mode index

Claims (2)

[Claims] 1. Display means for displaying various kinds of information by means of a pointer which is rotationally driven in only one direction on a scale plate by an electric drive source, and forward / reverse rotation for setting various kinds of information by changing a pointing position of the pointer. It is provided with a possible setting dial and control means for rotating the pointer only in a predetermined direction by the electric drive source according to the rotation amount of the setting dial in any direction. Camera display device. 2. A first display for displaying various kinds of information by a pointer which is rotationally driven in only one direction by an electric drive source on a scale plate.
Display means, second display means for displaying various information on the scale plate by a pointer that is driven in the forward and reverse directions by an electric drive source, and a pointing position of the pointer of the first display means or the second display means. And a setting dial capable of reversing and setting various information, and a display means for setting various information by changing the pointing position of the pointer from the first display means and the second display means. When the first display means is selected by the selecting means for selecting, the setting dial is rotated by the electric drive source in accordance with the rotation amount regardless of the direction of rotation of the setting dial. When the pointer of the display means is rotated only in a predetermined direction and the second display means is selected by the selection means, the second display means of the second display means is rotated according to the rotation direction and the rotation amount of the setting dial. Positive guideline A display device for a camera, comprising: a control unit for reversing.