JPH02240702A - Electronic equipment containing microcomputer - Google Patents

Abstract

PURPOSE:To improve the operability of an electronic equipment containing a microcomputer by setting another mode if at least two switch means are pushed approximately at one time and resetting automatically the mode that was changed mistakenly in response to the switch means pushed first to the mode set before push of the switch means. CONSTITUTION:Another mode is set when an UP switch SW3 and a DOWN switch SW4 are pushed at one time. In this case, however, either one of both switches is pushed earlier than the other to be exact. For instance, a synchro- mode is changed to a slow synchro-mode SS if the switch SW4 is closed right after the switch SW3 is closed. At the same time, the exposure value is automati cally reset to the value set before the SW3 is closed. Thus it is not required to reset the original state via the SW4 after the synchro-mode is changed. So is with a case where the SW4 is closed right after the SW3 is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an electronic device having a microcomputer equipped with a plurality of push-type switch means for selecting different modes.

(Background of the Invention) Conventionally, many electronic devices using microcomputers have been put into practical use, and pushbutton type switches are generally employed as information input means for operating the devices.

However, in small electronic devices such as cameras and watches, the space on the switch operation surface is very narrow, so the number of switches is limited, and if the device is configured so that one switch performs one function, it is difficult to use the device. However, we are trying to solve this problem by pressing multiple switches at the same time.

For example, in the exposure correction of a camera, two buttons are provided, one button is used in ten directions, that is, in the direction of increasing the exposure value, and the other button is used in the direction of decreasing the exposure value to correct the exposure value. In this case, a configuration in which the exposure value is changed each time a switch in an intended direction is pressed is well known. Here, the former switch is assumed to be an up switch, and the latter switch is assumed to be a down switch.

In such a configuration, by pressing both the up switch and the down switch, other shooting modes,
For example, when trying to implement a multiple exposure mode, the exposure value changes in the direction of the switch that was pressed first (in the up direction or down direction), and then it becomes possible to select another mode. Therefore, since the operator did not press both switches to perform exposure compensation, there was an inconvenience in that the operator had to use the up or down switch again to return to the previous exposure value.

(Object of the Invention) An object of the present invention is to provide an electronic device having a microcomputer that is configured to set another mode when at least two switch means are pressed substantially simultaneously, and which makes it possible to improve operability. It is to be.

(Features of the Invention) In order to achieve the above object, the present invention sets a predetermined mode different from the plurality of modes by detecting that at least two of the plurality of switch means are pressed substantially simultaneously. a mode setting means for setting a predetermined mode, and when a predetermined mode is set by the mode setting means, a mode changed in response to whichever of the switch means pressed at substantially the same time is pressed first; A mode correction means is provided for returning to the mode immediately before the pressing operation of the switch means, so that when at least two switch means are pressed almost simultaneously, another mode is set and the previous mode is set. The present invention is characterized in that the mode changed in response to the switch means being pressed is automatically returned to the mode before the switch means was pressed.

(Embodiment of the Invention) FIG. 1 is a circuit diagram showing an embodiment of the present invention, and its operation will be explained below.

When the power switch SW2 on the strobe device side is closed, the capacitor 18 is charged via the power supply 15 and the diode 7, and its terminal voltage is applied to the microcomputer (hereinafter referred to as microcomputer) 40, and the microcomputer 40 is initialized. is carried out and becomes operational. The detailed operation of the microcomputer 40 will be described later, but the operation in the initialized state will be described here.

Here, the initialized state means that the display unit 41 is
A binary signal that displays an aperture value of F5.6 is sent from the boat group Pa to the D/A converter 39 to display an aperture value of F5.6.
．． A binary signal corresponding to 6 is output. Mata boat P
2 outputs a low level (hereinafter referred to as "L").

By closing the power switch SW2 on the strobe device side, the known booster circuit 16 is activated, and charging of the main capacitor 19 is started. When the charging voltage of the main capacitor 19 exceeds the lighting start voltage of the neon tube 37, the neon tube 37 lights up and a high level (hereinafter referred to as "H") signal is generated in the resistor 38, which is transmitted to the port P6 of the microcomputer 40. is processed within the microcomputer 40, and the output of the boat P1 becomes “L”.
to "H". The “H” signal is connected to the connection terminal Tdl.
The signal is then transmitted to the shutter control circuit 14 on the camera side via the connection terminal Td2 on the camera side, the camera enters the strobe mode, and the shutter speed is set to a predetermined value suitable for strobe photography (for example, 1/125 seconds).

In this state, when the camera is released using the release button (not shown), the shutter (not shown) is fully opened, and the synchronization contact S
W is closed. When this is closed, the one-shot multivibrator 1 operates, and its output is normally "H" for a predetermined period of time (several milliseconds, which is slightly longer than the strobe flash time).
It begins to output "L". The "L" signal turns off the transistor 3, and the integration capacitor 5 becomes ready for integration. Furthermore, the "L" output of the multivibrator 1 is input as a "H" signal to one terminal of the AND gate 8 via the inverter 7, but since one terminal of this Shisen is "H", the AND gate 8 is inputted as a "H" signal. The output of gate 8 is “H”
”, and the transistor 26 on the strobe device side is turned on via the connection terminal Ta2.Tal.

When the transistor 26 is turned on, the transistor 30 is turned on, and the transistor 31 is turned off, so that the capacitor 2
3 terminal voltage is In5ulated GatBipol
ar Transistor (hereinafter referred to as IGBT)
32, and the IGBT 32 is turned on. When the trigger capacitor 36 is turned on, the charge in the trigger capacitor 36 is discharged through the primary side of the trigger transformer 34, so a high voltage is induced on the secondary side and is applied to the trigger bridge of the xenon discharge tube 33, causing flash light emission. Start.

The reflected light from the subject due to the light emission is received by the light receiving element 4 via a lens (not shown) and a reflecting surface of the film, and the integration is started by the integrating capacitor 5. The integrated voltage is applied to the negative input of the comparator 6 via the logarithmic compression circuit 42. The positive input of the comparator 6 receives a voltage determined by calculating the analog signal corresponding to R5, 6 from the D/A converter 39 on the strobe device side and the analog signal from the film sensitivity setting device 13 using the operational amplifier 10. It is given. When the integrated voltage applied to the negative input exceeds the positive input voltage, the output of the comparator 6 becomes "L" and is applied to the other input of the AND gate 8, and the output becomes "L". “L” signal is from terminal T R
2. The base voltage of the transistor 6 is set to "L" via T al, and the transistor 6 is turned off.

When the transistor 6 is turned off, the transistor 30 is turned off, the transistor 31 is turned on, and the gate of the GBT 32 becomes ground level, the IGBT is turned off, the discharge current of the xenon discharge tube 33 is cut off, and light emission is stopped.

Next, using the flowchart shown in FIG. 2, the operations related to button button operations of the microcomputer 40 after initialization will be mainly explained.

In steps 1 to 5, an initialization operation is performed after the power switch Swz is turned on. In step 1, tighten the resistors R1° and R2 to R5.
, 6 (hereinafter referred to as F5.6), and in step 2 set the information corresponding to the normal synchronization mode (
Set the following. Here, the normal synchronization mode is a mode in which the synchronization time is fixed no matter what value the shutter speed is set to. In step 3, the contents of registers R, , R2 are displayed on the display 41, and in step 4, the contents of register R1, that is, binary data corresponding to R5, 6, are sent to the D/A converter 39 via the boat group Pa. Output. In step 5, the contents of register R3 are output to boat P2. Since SS is set in the register R3, the output of the port P2 becomes "L".

Here, if information corresponding to slow synchronization mode (hereinafter referred to as SS) is set in register R3,
“H” is output from boat P2. Note that the slow synchro mode is a mode in which the shutter is controlled by the set value of the shutter speed when it is lower than the sync speed, and by the sync speed when it is faster than the set value, and in this embodiment, the up switch SW 3 and down switch SW
The camera is configured to automatically switch the mode when both of the pressing operations in 4 are performed, assuming that the switching operation to another shooting mode has been performed, that is, the switching operation to the slow synchro mode has been performed. shall be.

In step 6, it is determined whether the switch SW3 for shifting the aperture value to a larger value (hereinafter referred to as up switch) is pressed, that is, closed. If it is closed, the process proceeds to step 7; If so, proceed to step 23. In step 7, the contents of the register R1 (hereinafter referred to as FRI) are increased by one aperture stop, and the result is set in the register R1 again. In step 8, the contents of the register R1 (FR1+1 stage) are displayed on the display 41, and a signal corresponding to the contents is output from the boat group Pa. Step 9 is a switch (hereinafter referred to as a down switch) for shifting the aperture to a smaller value.

It is determined whether or not is pressed, that is, closed. If it is closed, the process goes to step 10; if not, the process goes to step 14. In step 10, the contents of the register R3 are replaced. That is, if SS is set, it is set to SS, and if SS is set, it is set to SS. In step 11, the contents of the register R3 are displayed on the display 41, and the contents are outputted from the boat P2. Step 1
In step 2, the contents of register R2 are set in register R1. In step 13, the contents of the register R1 are displayed on the display 41, and the contents of the register R1 are outputted from the boat group Pa. In step 14, a timer is started, and after a predetermined period of time (usually 0.2 to 1 sec), step 1 is started.
The timer counts up at step 5, and the process returns to step 6.

In step 23, the contents of register R1 are set in register R2. In step 16, if the down switch SW is closed, proceed to step 17; if it is not closed, proceed to step 22. In step 17, one aperture step is subtracted from FRI, and the result is set in register R1 again. . In step 18, the contents of the register R1 are displayed on the display 41, and the contents are output from the boat group Pa. In step 19, it is determined whether the up switch SW4 is closed. If it is closed, the process advances to step IO; if it is not closed, the process advances to step 20, step 20.
21 is almost the same as the timer operation described in step 14.15 above, the timer starts in step 20, and after a predetermined period of time (usually 0.2 to 1 sec) has elapsed, the timer counts up in step 21.

In step 22, the contents of register R1 are set in register R2.

According to this embodiment, when the configuration is such that another mode (SS in this embodiment) is realized by pressing the up switch SW3 and the down switch SW at the same time, it is strictly For example, if the down switch SW4 is closed immediately after the up switch SW3 is closed, the synchro mode is set to SS, that is, the slow synchro mode. and up switch SW3.
Since the aperture value is automatically returned to the value before it was closed, after changing the synchro mode, the down switch SW,
There is no need to return to the original state.

Conversely, the same applies when the up switch SW4 is closed immediately after the down switch SW3 is closed.

(Correspondence between the invention and the embodiments) In the present embodiment, the up switch SW3 and the down switch SW4 are provided as the plurality of switch means according to claim 1 or the first switch means according to claim 2. This corresponds to the second switch means. Further, the part in the microcomputer 4o that performs the operations of steps 6 to 10 (or steps 16 to 19 and 10) in FIG. Each corresponds to a means.

(Modified example) In this embodiment, two switches are provided, and other modes can be set by pressing them at almost the same time. However, the present invention is not limited to this. The present invention can be similarly applied to a device having a switch and having a configuration in which other modes can be set by pressing at least two or more switches at substantially the same time.

(Effects of the Invention) As explained above, according to the present invention, when at least two switch means are pressed substantially simultaneously, another mode is set, and the switch that was pressed first is set. Since the mode that has changed in response to the switching means is automatically returned to the mode before the suppression of the switching means, it is possible to improve the operability of the device.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing one embodiment of the present invention, and FIG. 2 is a flow chart showing its operation. 40... Microcomputer, SW3... Up switch, SW4... Down switch.

Claims (2)

[Claims] (1) In an electronic device having a microcomputer equipped with a plurality of push-type switch means for selecting different modes, detecting that at least two of the plurality of switch means are pressed substantially simultaneously. mode setting means for setting a predetermined mode different from the plurality of modes, and when the predetermined mode is set by the mode setting means, whichever of the switch means pressed substantially at the same time is selected first; 1. An electronic device having a microcomputer, characterized in that it is provided with mode correction means for returning the mode changed in response to the pressed switch means to the mode immediately before the pressing operation of the switch means. (2) An electronic device having a microcomputer equipped with a first switch means that sets the first mode by pressing the button, and a second switch means which sets the second mode by pressing the button. The apparatus includes a mode setting means for setting a third mode by detecting that the first and second switch means are pressed substantially simultaneously, and a third mode is set by the mode setting means. In this case, mode correction means is provided for returning the mode changed in response to whichever of the first and second switch means was pressed first to the mode immediately before the pressing operation of the switch means. An electronic device having a microcomputer characterized by: