JPH0694860A - Display device - Google Patents

Abstract

PURPOSE:To display accurately that the device is in the non-operating condition when the operation of the device is stopped. CONSTITUTION:This display device is provided with a display means 5 to display various data on a device 2 which can set the operating condition and the non-operating condition by a pointer 5a driven on a dial 5b, a driving means to drive the pointer 5a, and a control means to set the pointer 5a to the scale 'OFF' to indicate the non-operating condition on the dial 5b by the driving means.

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 displaying various kinds of information by a pointer that moves on a scale plate.

[0002]

2. Description of the Related Art A timepiece using a step motor as a rotary drive source of a pointer is known. The step motor used in this type of timepiece is small in size, highly reliable, and mass-produced, so that it is inexpensive, and it can be considered to be used as a drive source for a display device other than the timepiece.

However, when a display device using a stepping motor for a timepiece is applied to various devices, when the operation of the device is stopped by turning off the power switch of the device, the pointer of the display device remains in the same position. There is the problem of shutting down and giving the user the false impression that the device is still in operation.

It is an object of the present invention to clearly indicate that the device is inactive when the device is deactivated.

[0005]

The present invention will be described with reference to FIG. 5 showing a display device according to an embodiment. The present invention will be described as being operated or not operated by a pointer 5a driven on a scale plate 5b. A display unit 5 for displaying various information of the device 2 whose state can be set, a drive unit for driving the pointer 5a, and the device 2
Is set to the inoperative state, the pointer 5a is driven by the driving means.
And a control means for setting the scale to "OFF" indicating the non-operating state on the scale plate 5b, thereby achieving the above object.

[0006]

When the device 2 is in operation, various information of the device 2 is displayed by the pointer 5a driven on the scale plate 5b. When the device 2 is set to the inoperative state, the pointer 5a
Is set to the scale "OFF" indicating the non-operating state on the scale plate 5b. This makes it possible to clearly recognize the non-operating state of the device 2.

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

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a top view of a camera equipped with a display device according to an embodiment. A camera main switch 3, a release button 4, and a display 5 are provided on the upper surface of a camera body 2 in which the taking lens barrel 1 is mounted. The main switch 3 is a switch for selecting an operating state and a non-operating state in which the camera can photograph, and FIG. 1 shows an on state. Indicator 5
Indicates the number of shooting frames, and in FIG. 1, the pointer 5a indicates the shooting frame 30 on the scale plate 5b.

FIG. 2 is a block diagram showing the configuration of an embodiment. The control circuit 10 is composed of a peripheral component such as a microcomputer and a non-volatile memory 10m, performs the sequence control of the camera and various calculations, and executes the control program described later to control the display of the display unit 5. The control circuit 10 controls the drive circuit 11 to drive the film feeding motor 11M to wind and rewind the film, and at the same time to control the drive circuit 12 to drive the step motor 12M to adjust the film feeding amount. Depending on the indicator 5
The pointer 5a is rotated.

3 and 4 are flowcharts showing a control program of the microcomputer. The operation of the embodiment will be described with reference to these flowcharts. In step S1, it is determined whether or not the main switch 3 of the camera is turned off. If the main switch 3 is turned off, the process proceeds to step S2, and if it remains on, the process proceeds to step S4. In step S2, the current position of the pointer 5a is stored in the memory 10m. The control circuit 10 sets the number of frames to be photographed “1” or “OFF” as the reference position of the pointer 5a, and integrates the rotation amount from the reference position every time the pointer 5a is rotationally driven with the film feeding, and this reference is used. The current position of the pointer 5a is recognized based on the rotation amount from the position. Since the memory 10m is a non-volatile memory, it stores the current position of the pointer 5a even when the power of the camera is turned off. In the subsequent step S3, the pointer 5a is driven by the step motor 12M as shown in FIG. 5, the pointer 5a is set to the "OFF" position, and the non-operating state is displayed. If the main switch 3 is still turned on in step S1, the process proceeds to step S4, and the number of frames to be photographed is displayed on the display 5 along with the normal operation of the camera.

Further, in step S11 of FIG. 4, it is determined whether or not the main switch 3 is turned on, and if it is turned on, the process proceeds to step S12, and if not, step S12.
Proceed to 14. In step S12, the current position of the pointer 5a stored in the memory 10m when the main switch 3 is turned off is read, and in step S13, the step motor 1 is read.
The pointer 5a is set at the current position read by driving 2M, and the number of frames to be photographed is displayed. If the main switch 3 remains off in step S11, the process proceeds to step S14 to continue the above-described display of the non-operating state.

As described above, when the camera body 2 is set to the non-operating state by the main switch 3, the step motor 12M sets the pointer 5a to the "OFF" scale indicating the non-operating state on the scale plate 5b. As a result, the non-operating state of the camera can be clearly recognized.

In the above embodiment, the display device of the present invention is used to display the number of frames taken by the camera.
The display information is not limited to the above embodiment. Further, the display form of the non-operating state of the display is not limited to the above embodiment.

Further, the display device of the present invention can be applied to other than a camera. Further, in the above embodiment, the pointer which is rotationally driven on the circular scale plate has been described as an example, but the scale plate is arranged on a straight line, and a display device that moves the pointer along the straight scale plate is used. The present invention can also be applied to it.

In the structure of the above embodiment, the display 5 serves as the display means, the drive circuit 12 and the step motor 12M.
Constitutes the driving means, and the control circuit 10 constitutes the control means.

[0016]

As described above, according to the present invention, when the device is set in the non-operating state, the pointer is set to the scale indicating the non-operating state on the scale plate. You can clearly recognize the condition.

[Brief description of drawings]

FIG. 1 is a top view of a camera including a display device according to an embodiment.

FIG. 2 is a block diagram showing the configuration of an embodiment.

FIG. 3 is a flowchart showing a display control program of the microcomputer when the main switch is off.

FIG. 4 is a flowchart showing a display control program of the microcomputer when the main switch is turned on.

FIG. 5 is a diagram showing a display example of a non-operating state on the display.

[Explanation of symbols]

 1 Photographic lens barrel 2 Camera body 3 Main switch 4 Release button 5 Display 5a Pointer 5b Scale plate 10 Control circuit 10m Memory 11, 12 Drive circuit 11M Film feed motor 12M Step motor

Claims (1)

[Claims] 1. A display unit for displaying various kinds of information of a device in which an operating state or a non-operating state can be set by a pointer driven on a scale plate, a driving unit for driving the pointer, and the device not operating. And a control means for setting the pointer to the scale indicating the non-operating state on the scale plate by the driving means when the display device is set to the state.