JPH0643531A - Switch input controller of electronic equipment - Google Patents

Abstract

PURPOSE:To obtain the switch input controller of the electronic equipment which suppresses the consumption of a battery by securing the operability of switches and also reducing the current consumption. CONSTITUTION:This controller has plural switches S0-S3, etc., and is also equipped with a period setting means 210 which are controlled through the operation of those switches to individually set periods wherein the operation states of the switches are confirmed corresponding to the switches, a switch state confirming means 211 which confirm the operation states of the switches, and a control means 212 which drives the switch state confirming means 211 at the periods set by the period setting means 210.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch input control device for electronic equipment such as a camera driven by a power supply.

[0002]

2. Description of the Related Art For example, there is an electronic camera that uses a battery as a driving power source and has a plurality of switches. Since such an electronic camera operates based on the input of each switch, the operating state of the switch is, for example, a micro A computer sets and checks a certain period.

[0003]

As described above, the operating state of each of the plurality of switches is confirmed by the microcomputer at a certain cycle. For example, if the confirmation cycle is shortened to improve the operability of the switch. , The current consumption increases and the battery consumption becomes faster.

On the other hand, if the check cycle of the microcomputer is lengthened in order to suppress the power consumption of the battery, for example, in the case of a push switch or the like, even if the operator pushes the switch, the state change of the switch will be in the check cycle. ,
The microcomputer does not accept it, and the camera does not immediately respond to the switch operation, resulting in a situation in which the camera responds by a plurality of switch pressing operations, resulting in extremely poor operability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a switch input control device for an electronic device, which can ensure the operability of the switch and reduce the current consumption.

[0006]

In order to solve the above-mentioned problems, a switch input control device for an electronic device according to the present invention has a plurality of switches, and the electronic device is controlled by the operation of the plurality of switches. , A cycle setting means for individually setting a cycle for checking the operating state of the switch in advance, a switch state checking means for checking the operating state of the switch, and the switch state checking means for setting the cycle setting means It is characterized by having a control means for driving in a predetermined cycle.

[0007]

According to the present invention, the cycle for checking the operating state of the switch is set according to each type and purpose of the switch, so that the operability of the switch can be ensured and the current consumption can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a switch input control device for electronic equipment according to the present invention is applied to a camera will be described below with reference to the drawings. FIG. 1 is a perspective view of a camera. A strap mounting portion 2 is provided on the right side of the camera body 1, and a taking lens 3 is provided on the front center of the camera body 1. A finder 4 is provided above the taking lens 3 on the front side of the camera body 1, and a light projecting window 5 for autofocus is provided on one side of the finder 4 and a light receiving window 6 is provided on the other side. Above the light receiving window 6, a photometric window 7 for subject brightness measurement and a self-display section 8 are provided. Further, a stroboscopic light emission window 9 is provided on the left side of the camera body 1, and the stroboscopic light emission window 9 is vertically arranged so that the stroboscopic light emission does not adversely affect photographing by separating from the photographing lens 3.

A main switch S0 is provided above the camera body 1, and release switches S1 and S2, a mode selection switch S3 and a rewind switch SR are provided in front of the main switch S0.

FIG. 2 is a control circuit diagram of the camera. The control circuit of this camera is provided with a CPU 20.
20 is supplied with driving power from the main battery E1 through the diode D1, and further the diode D2 and the sub battery E
2 is connected in parallel with the main battery E1 and the diode D1 to provide an auxiliary power source. A main switch S0, release switches S1 and S2, a back cover switch SB, a mode selection switch S3, a rewind switch SR and the like are connected to the CPU 20. Main switch S
0 is a push button switch, and release switches S1 and S2 are also push button switches.
Release switch S1 is turned on by pushing the step, and 2
The release switch S2 is turned on by pushing the step.
Further, the mode selection switch S3 and the rewind switch SR are also composed of push button switches.
The back cover switch SB is composed of a status switch.

As described above, the camera is operated by the power supply from the battery, has a plurality of switches, and is controlled by the operation of these plurality of switches. The CPU 20 has a cycle setting means 210 and a switch state confirmation means 211. ,
And a control means 212.

The cycle setting means 210 has a preset cycle for checking the operating state of each switch, and the cycle for checking is individually set in advance for each switch type and purpose. ing. For example, the cycle for confirming the operating state of the state switch such as the back cover switch SB or the rewind switch SR that is kept pressed until the camera is activated is set long in order to reduce the consumption source flow, while the main switch S0 is set. The check cycles of the push button switches such as the release switches S1 and S2 and the mode selection switch S3 are set to be short in order to improve operability. Also, the switch state confirmation means 211
Is to confirm the operating state of the switch at a set cycle and is controlled by the control means 212.

Therefore, in the switch state confirmation means 211, the operation state of the state switch such as the back cover switch SB or the switch such as the rewind switch SR that is kept pressed until the camera is activated is confirmed in a long cycle. , The current consumption can be reduced. On the other hand, since the operation states of the push button switches such as the main switch S0, the release switches S1 and S2, and the mode selection switch S3 are confirmed in a short cycle, the operability can be improved.

As described above, the operating state of each of the plurality of switches is confirmed by the CPU 20, but the period of confirmation is individually set in advance according to the type and purpose of each switch. Thus, the operability of the switch can be secured, the current consumption can be reduced, and the battery consumption can be suppressed.

In order to reduce the current consumption, CP
If the switch connection is set to the interrupt port when the U20 is in the standby state, when the switch state changes, the CPU20 becomes the operating state, and the CPU20 determines which switch has been operated thereafter. Will be done. By the way, while the interrupt port is limited, there are many switches to be judged. It is difficult to set all of these switches as interrupt ports.
For this reason, a switch is connected to the normal input terminal of the CPU 20 so that the state of the switch can be confirmed in a short cycle.
It is possible to reduce the load on the CPU 20 such as interruption.

A liquid crystal display unit 21 is connected to the CPU 20, and the liquid crystal display unit 21 is provided with, for example, a film counter, a battery display, a self display, and a flash display. Further, a flash circuit 22, a photometry circuit 23, a voltage detection circuit 24, a distance measurement circuit 25, a driver circuit 26, and a shutter position detection circuit 27 are connected to the CPU 20. In the voltage detection circuit 24, each strobe circuit 22, photometry circuit 23, distance measurement circuit 25,
The drive voltage applied to the driver circuit 26 and the shutter position detection circuit 27 is detected.

The strobe circuit 22 is activated by a trigger signal from the CPU 20 to emit strobe light, and the strobe capacitor is charged by a charge signal from the CPU 20. The photometric information is input to the photometric circuit 23 from the photometric element 28, and the photometric information and the film sensitivity information is input to the CPU 20 from the film sensitivity input means (not shown). Change.

In the distance measuring circuit 25, the light projecting element 29 is caused to emit light by the distance measuring signal from the CPU 20, and the reflected light from the subject is received by the light receiving element 30 to measure the distance. The driver circuit 26 receives the lens motor 31, the film motor 32, and the shutter motor 3 based on the control signal from the CPU 20.
Drive 3 The shutter position detection circuit 27 is adapted to detect the position of the shutter blade based on a signal from the photo interrupter 34.

FIG. 3 is a flowchart of the operation of the camera. If the battery check BC is performed in step a and the voltage is equal to or higher than the predetermined voltage, the input state of the main switch S0 is determined after waiting 200 ms, for example (step b), and the determination of the input state of the main switch S0 is repeated five times. (Step c). The confirmation cycle of the main switch S0 is shortened to improve operability.

When the main switch S0 is not input, the state of the back cover switch SB is judged (step d). When the back cover is opened, the film counter is set to "0".
Then, if the back cover is not opened (step e), the input state of the rewind switch SR is judged as it is (step f). If the rewind switch SR is OFF, the process moves to step a and the battery check BC
Is done. When the rewind switch SR is turned on, the film is rewound (step g).

On the other hand, when the main switch S0 is turned on in step b, it is judged whether or not the main switch S0 is returned to the off position (step h), and if it is returned to the off position, the battery check BC is performed again. (Step i). If the battery check BC indicates that the voltage is below the predetermined voltage, the process proceeds to step a, and if the voltage is above the predetermined voltage, the input state of the release switch S1 is determined (step j). When the relays switch S1 is OFF, the state of the back cover switch SB is determined (step k), and when the back cover is closed, the input state of the mode selection switch S3 is determined (step l). When the mode selection switch S3 is input, the mode is changed (step m), and when the mode selection switch S3 is turned off (step n), the input state of the rewind switch SR is determined (step o). Similarly, when the mode selection switch S3 is OFF in step l, the input state of the rewind switch SR is similarly determined (step o).

When the rewind switch SR is turned on in step o, the process goes to step g to rewind the film. When the rewind switch SR is turned off, the input state of the main switch S0 is determined (step p). When the back cover is opened in step k, the film counter is set to "0" (step q), and the input state of the main switch S0 is judged (step p).

At step p, if the main switch S0 is turned on and returned to the off position (step r), the process proceeds to step a. In step p, if the main switch S0 is OFF, this state proceeds to step a after 30 minutes (step s), and to step i within 30 minutes.

In step j, the release switch S
When 1 is turned on, photometry and distance measurement are performed (step t),
Subsequently, when the release switch S2 is turned on (step u), shutter control is performed and an image is taken (step v). In step u, the release switch S2 is OF
If it is F, the input state of the release switch S1 is determined (step w), and if the release switch S1 is turned on, the process proceeds to step u to determine the input state of the release switch S2. If the release switch S1 is OFF in step w, the process proceeds to step k.

[0025]

As described above, since the electronic device of the present invention has a plurality of switches and the confirmation cycle of the plurality of switches can be individually set, the minimum required amount is set according to the type and purpose of each switch. Limit switch confirmation cycle and other switch confirmation cycles that do not affect operability, to reduce the current consumed by the operation of the microcomputer to confirm the switch status, It is possible to suppress the wear of the switch and ensure the operability of the switch.

[0026]

[Brief description of drawings]

[0027]

FIG. 1 is a perspective view of a camera.

[0028]

FIG. 2 is a block diagram of a control circuit of the camera.

[0029]

FIG. 3 is an operation flowchart of the camera.

[0030]

[Explanation of symbols]

 20 CPU S0 Main switch S1, S2 Release switch SB Back cover switch S3 Mode selection switch SR Rewind switch

Claims (1)

[Claims] 1. An electronic device having a plurality of switches, which is controlled by the operation of the plurality of switches, and a cycle setting means for presetting a cycle for checking the operating state of each of the switches in advance. A switch input control device for an electronic device, comprising: a switch state confirmation means for confirming an operation state of the switch; and a control means for driving the switch state confirmation means at a cycle set by the cycle setting means.