JP2008048318A - Electronic device, and control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the power consumption of a microcomputer in an electronic volume for which the microcomputer reads the output data of an ADC at a fixed time interval and controls the attenuation amount. <P>SOLUTION: A user adjusts the volume of a speaker 16 by rotating a rotary type volume part of a portable radio receiver 10. A variable resistor part 23 outputs a voltage corresponding to the displaced position of the rotary type volume part and the voltage is converted to a digital value by an A/D converter 24. The microcomputer 25 reads the data of the A/D converter 24 at the fixed time interval and controls the attenuation amount of an electronic volume part 14 to the one corresponding to the data. A comparator part 29 outputs interruption signals to an interruption input terminal 26 in a period during which there is a prescribed difference between the output voltage of the variable resistor part 23 and the voltage delayed by the comparator part 29. The microcomputer 25 executes the processing of reading the data of the A/D converter 24 only in the period during which the interruption signals are inputted from the comparator part 29. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic apparatus equipped with a function for a user to adjust a control amount of a predetermined control object via an operation member, such as volume adjustment in a portable wireless receiver, and a control method.

  Patent Document 1 discloses an electronic device in which a user rotates a mechanical volume unit and adjusts a sound volume according to a rotational position of the mechanical volume unit (FIGS. 1, 3a to 3f of Patent Document 1). etc). In the electronic device, a plurality of volume adjustment patterns for defining volume rotation angle (rotation position) -volume are prepared (FIGS. 3a to 3f of Patent Document 1), and the volume adjustment patterns are switched to correspond to each situation. Volume rotation angle (rotation position) —Volume can be set appropriately.

In a typical rotary volume unit in a portable radio device, the rotation position is converted into a voltage using a variome that changes a resistance value in conjunction with the rotation. Further, the output voltage of the variome is converted into a digital value by an ADC (analog / digital converter), and the microcomputer reads the output data of the ADC at a constant time interval (eg, 3 to 10 msec), and the attenuation amount in the electronic volume. To control.
JP-A-2005-347878

  In the conventional portable radio, during power-on, the microcomputer reads the output data of the ADC at regular intervals without pause, in order to read the change in the rotational position of the mechanical volume unit without delay. It is repeating.

  Such data reading at regular intervals hinders the microcomputer from setting a standby mode period, which not only increases the power consumption of the microcomputer, but also reduces the time to direct the microcomputer to other controls. It is also a cause. In particular, for battery-powered electronic devices such as portable radios, it is strongly desired to reduce the power consumption of the microcomputer in order to increase the battery life.

  The objective of this invention is providing the electronic device and control method which can reduce the reading process of the displacement position of the operation member displaced by a user without trouble.

The electronic device of the present invention includes the following.
An operation member that is displaced by a user,
Position data reading means for reading displacement position data of the operation member;
Presence / absence determining means for determining presence / absence of a displacement operation of the operation member;
When there is no displacement operation of the operation member, the operation of the position data reading means is stopped in principle, and when there is a displacement operation of the operation member, the operation control means for operating the position data reading means, and the position data reading means Adjusting means for adjusting the control target to a control amount corresponding to the displacement position data read by the user.

An electronic apparatus to which the control method of the present invention is applied includes an operation member that is displaced by a user, a position data reading unit that reads displacement position data of the operation member, and a control amount corresponding to the displacement position data read by the position data reading unit Adjusting means for adjusting the object to be controlled. The control method of the present invention includes the following steps.
Determining whether the displacement position of the operating member has changed,
A step of stopping the operation of the position data reading means when there is no displacement operation of the operation member, and a step of operating the position data reading means when there is a displacement operation of the operation member.

  According to the present invention, when there is no displacement operation of the operation member by the user, the process of reading the displacement position data of the operation member by the position data reading means is stopped in principle, so that power saving of the microcomputer or the like is promoted, Can be directed to other processes other than the reading process.

  FIG. 1 is a schematic configuration diagram of a portable radio receiver 10. The portable radio receiver 10 uses a battery (not shown) as a power source. An ordinary portable radio device serves as both a receiver and a transmitter, and the portable radio receiver 10 of FIG. 1 is a configuration diagram of a receiving system in the ordinary portable radio device.

  A sound wave having a plurality of frequencies arrives at the antenna 11, and a signal received by the antenna 11 and selected at the front end (not shown) is amplified by the high-frequency amplifier 12 and then detected. Sent to the unit 13. The voice reception signal is detected by the detection unit 13, and the detection signal is sent to the electronic volume unit 14 as an analog audio signal.

  The electronic volume unit 14 attenuates the analog audio signal from the detection unit 13 based on the control signal from the microcomputer 25 and outputs it to the audio amplification unit 15. The audio amplifying unit 15 amplifies the analog audio signal from the electronic volume unit 14 and sends it to the speaker 16. The speaker 16 outputs audio related to the analog audio signal from the audio amplifying unit 15.

  A user who carries and uses the portable radio receiver 10 can adjust the volume from the speaker 16 by rotating the rotary volume operation unit (not shown) and changing the rotation position. . The variome unit 23 is applied with a ground voltage and a predetermined positive voltage V at both ends, and the tap point resistance value is adjusted according to the rotational position of the rotary volume operation unit. The voltage corresponding to is output.

  The analog output voltage of the varium unit 23 is output to the A / D converter 24, one terminal of the comparator unit 29, and the time constant unit 28. The A / D converter 24 converts the analog output voltage from the variohm unit 23 into a digital value and outputs it to the microcomputer 25.

  The time constant unit 28 delays the analog output voltage from the variohm unit 23 by a predetermined time and outputs it to the other input terminal of the comparator unit 29. The comparator unit 29 outputs the first level voltage to the interrupt input terminal 26 of the microcomputer 25 only during a period in which the voltages at both input terminals have a predetermined difference, and is different from the first level in other periods. Is output to the interrupt input terminal 26. The microcomputer 25 recognizes the first level voltage from the comparator unit 29 as an interrupt signal. The first and second level voltages are, for example, a voltage value equal to or greater than a predetermined value and a voltage value less than the predetermined value.

  FIG. 2 is an explanatory diagram of the relationship between the input voltage and the output voltage in the comparator unit 29. The output voltage of the variome unit 23 reaches the one terminal of the comparator unit 29 without a time delay, and reaches the other terminal after being delayed for a predetermined time via the time constant unit 28.

  In the example of FIG. 2, the user rotates the rotary volume operation unit by a first predetermined amount in the rotation direction of the large volume over time from time t1 to time t3. In addition, the user rotates the rotary volume operation unit by a second predetermined amount in the rotation direction of the small volume over time from time t5 to t7. In the example of FIG. 2, it is assumed that | first rotation amount |> | second rotation amount | and | rotation speed in one rotation direction |> | rotation speed in the other rotation direction |. In addition, | numerical value | means the absolute value of a numerical value.

  The output of the time constant unit 28 is delayed by the time d from the output of the variohm unit 23. With respect to t1, t3, t5 and t7, the times when the time d has passed are t2, t4, t6 and t8, respectively.

  The comparator unit 29 outputs the first level voltage only during a period (t1 to t4, t5 to t8) in which the voltages of both input terminals are different, and a period in which there is no difference (to t1, t4 to t5). From t8 to), the second level voltage is output. The first level voltage output from the comparator 29 to the interrupt input terminal 26 of the microcomputer 25 is recognized by the microcomputer 25 as an interrupt signal.

  In the example of FIG. 2, the comparator unit 29 outputs an interrupt signal when there is even a voltage difference between both input terminal voltages, but this may destabilize the output of the comparator unit 29. obtain. Accordingly, it is possible to set the comparator unit 29 so that an interrupt signal is output only when an appropriate threshold value is set and the voltage difference between both input terminal voltages is equal to or greater than the threshold value. However, if the threshold is too large, it may be difficult to generate an interrupt signal for a gentle operation of the rotary volume operation unit.

  The interrupt signal is continuously generated while the user rotates the rotary volume operation unit. During this period, the rotational position of the rotary volume operation unit fluctuates. Even if 24 output data are read, the read data may be changed immediately, and the reading may be wasted. Therefore, immediately before or after the user finishes rotating the rotary volume operation unit, that is, when the interrupt signal at the interrupt input terminal 26 changes from “present” to “none” or when it changes. The microcomputer 25 reads the output data of the A / D converter 24 only once.

  However, the reading of the output data of the A / D converter 24 by the microcomputer 25 is repeatedly executed every certain time (eg, 3 to 10 msec) during the release period of the microcomputer 25 in the standby (sleep) state. The rotation position during the rotation operation of the rotary volume operation unit may be reflected on the sound volume from the speaker 16 during the change.

  The microcomputer 25 sends a control signal corresponding to the data read from the A / D converter 24 to the electronic volume unit 14 and controls the attenuation amount in the electronic volume unit 14 to a value corresponding to the rotational position of the rotary volume operation unit. . In a typical portable radio receiver 10, a control signal from the microcomputer 25 to the electronic volume unit 14 is sent only during a period in which the attenuation in the electronic volume unit 14 is changed. That is, the output of the control signal from the microcomputer 25 to the electronic volume unit 14 is stopped during a period in which the attenuation amount in the electronic volume unit 14 does not need to be changed. The electronic volume unit 14 retains the attenuation corresponding to the last control signal from the microcomputer 25 even when the control signal from the microcomputer 25 is interrupted.

  The microcomputer 25 stops the process of reading the output data of the A / D converter 24 during the period when the second level voltage is input to the interrupt input terminal 26, that is, when the interrupt signal is not input. If the microcomputer 25 has no other processing to be executed during the suspension period, the microcomputer 25 can be put into a sleep state to save power. Even when the microcomputer 25 is in the sleep state, the microcomputer 25 is awakened as soon as an interrupt signal is input to the interrupt input terminal 26.

  FIG. 3 is a flowchart of the receiver volume position reading method 40. The receiver volume position reading method 40 is executed as soon as the portable wireless receiver 10 is turned on, and is finished as soon as the portable wireless receiver 10 is turned off. In S41, the microcomputer 25 is set in a standby state for an interrupt signal from the comparator unit 29, and the interrupt signal is monitored.

  In S42, it is determined whether or not there is an interrupt signal at the interrupt input terminal 26. If an interrupt signal is received, the process proceeds to S43. If not received, the process returns to S41. In S43, the standby state of the microcomputer 25 is released, and in S44, the microcomputer 25 reads the output data of the A / D converter 24.

  As described above, the reading of the output data of the A / D converter 24 by the microcomputer 25 in S44 is too early and the data is meaningless before the user finishes rotating the rotary volume operation unit. Become. Therefore, it may be performed only once immediately after the interrupt signal changes from “present” to “absent” or without delay. Further, in the cancellation period of the standby state of the microcomputer 25, the microcomputer 25 repeatedly reads the output data of the A / D converter 24 every time a certain time (for example, 3 to 10 msec) elapses, so that the rotation by the user is performed. The rotational position during the rotational operation of the expression volume operation unit may be reflected on the sound volume from the speaker 16 during the change.

  In S45, a control signal is sent from the microcomputer 25 to the electronic volume unit 14, and the audio signal attenuation amount in the electronic volume unit 14 is changed to one corresponding to the rotational position of the rotary volume operation unit. After S45, the process returns to S41. However, after S45, the process may return to S42 instead of S41.

  FIG. 4 is a block diagram of the electronic device 55. A specific example of the electronic device 55 is the portable wireless receiver 10 (FIG. 1), but the electronic device 55 may be another electronic device such as a mobile phone, an audio device, a video device, or an information processing device. . The electronic device 55 may be a portable type, a home placement type, or a car-mounted type. The electronic device 55 includes an operation member 56, position data reading means 57, presence / absence determination means 58, operation control means 59, and adjustment means 60.

  The operation member 56 is displaced by the user. The position data reading unit 57 reads the displacement position data of the operation member 56. Presence / absence determination means 58 determines whether or not the operation member 56 is displaced.

  The operation control means 59 stops the operation of the position data reading means 57 in principle when there is no displacement operation of the operation member 56, and operates the position data reading means 57 when there is a displacement operation of the operation member 56. Let The adjusting unit 60 adjusts the control target to a control amount corresponding to the displacement position data read by the position data reading unit 57.

  The control amount for the control target in the adjusting means 60 is typically the volume with respect to the speaker output sound in the speaker-equipped device. It may be a flow rate or a direction angle, a voltage, current or power with respect to a predetermined electronic element in an electric device, or a transmission frequency or reception frequency with respect to transmission or reception radio waves.

  The meaning of “principle” in “the operation control means 59 stops the operation of the position data reading means 57 in principle when there is no displacement operation of the operation member 56” is a special case when the operation member 56 is not displaced. This means that the position data reading means 57 may be activated. For example, when a period in which the operation member 56 is not displaced is prolonged and a considerable time has elapsed since the previous reading, the reading is performed for a predetermined time just in case. You can think about it.

  The displacement of the operation member 56 may be an arbitrary spatial displacement such as a displacement in a rotational direction, a displacement in a linear direction, or a curved displacement. In a typical electronic device 55, there is an element (for example, the variome part 23 in FIG. 1) that generates a voltage related to the displacement position of the operation member 56, and the output of the element is A / D (analog / digital) converted. An element (for example, the A / D converter 24 in FIG. 1) exists, and the position data reading means 57 reads the displacement position data of the operation member 56 from the A / D conversion element.

  In this way, when there is no displacement of the operation member 56, the process of reading the displacement position data of the operation member 56 by the position data reading means 57 is stopped. It can be directed to other processes.

  Typically, the position data reading means 57 repeatedly reads displacement position data related to the displacement voltage as a voltage corresponding to the displacement position of the operation member 56 at regular time intervals during its operation. A specific example of the position data reading means 57 is the microcomputer 25. The displacement voltage as the voltage corresponding to the displacement position of the operation member 56 is, for example, the output voltage of the variohm unit 23 (FIG. 1).

  FIG. 5 is a block diagram of a specific example of the presence / absence determining means 58. Presence / absence determination means 58 preferably includes delay means 65 and voltage difference detection means 66. The delay means 65 delays the displacement voltage as a voltage corresponding to the displacement position of the operation member 56. The voltage difference detection unit 66 determines whether or not the operation member 56 is displaced based on the difference between the displacement voltage and the output voltage of the delay unit 65.

  Specific examples of the delay unit 65 and the voltage difference detection unit 66 are the time constant unit 28 and the comparator unit 29 of FIG. 1, respectively. The presence / absence determination means 58 may be a differentiation circuit including a resistor and a capacitor or a coil.

  FIG. 6 is a flowchart of the displacement position reading method 72 for electronic equipment. A specific example of the electronic device displacement position reading method 72 is the receiver volume position reading method 40 (FIG. 3). The electronic device displacement position reading method 72 is based on the operation member 56 of the electronic device 55, the position data reading means 57, and the adjusting means 60. The function of the operation control means 59 is replaced with the processing of S74 and S75.

  In S73, it is determined whether or not the displacement position of the operation member 56 has changed. If the determination is negative, the process proceeds to S74, and if the determination is positive, the process proceeds to S75. In S74, the operation of the position data reading means 57 is stopped in principle. In S75, the position data reading means 57 is operated.

  The detection of the change in the displacement position of the operation member 56 in S73 is performed by replacing the functions of the delay means 65 and the voltage difference detection means 66 in FIG. And the displacement voltage can be detected based on the difference between the delayed voltage and the delayed voltage.

  Although the present invention has been described with respect to various specific embodiments, the present invention is not limited to this, and each component in the various specific embodiments is modified (including deletion) without departing from the gist of the invention. And can be materialized. Various inventions can also be formed by replacing constituent elements between various specific forms or combining a plurality of constituent elements in various specific forms.

It is a schematic block diagram of a portable radio receiver. It is explanatory drawing about the relationship between the input voltage and output voltage in a comparator part. It is a flowchart of the volume position reading method for receivers. It is a block diagram of an electronic device. It is a block diagram of the specific example of a presence determination means. It is a flowchart of the displacement position reading method for electronic devices.

Explanation of symbols

55: Electronic equipment, 56: Operation member, 57: Position data reading means, 58: Presence / absence judgment means, 59: Operation control means, 60: Adjustment means, 65: Delay means, 66: Voltage difference detection means, 72: Electronic equipment Displacement position reading method.

Claims (5)

An operation member that is displaced by a user,
Position data reading means for reading displacement position data of the operation member;
Presence / absence determining means for determining presence / absence of a displacement operation of the operation member;
When there is no displacement operation of the operation member, the operation of the position data reading means is stopped in principle, and when there is a displacement operation of the operation member, an operation control means for operating the position data reading means, and Adjusting means for adjusting a control object to a control amount corresponding to the displacement position data read by the position data reading means;
An electronic device comprising:   2. The position data reading means repeatedly reads displacement position data related to a displacement voltage as a voltage corresponding to a displacement position of the operation member during operation thereof at a predetermined time interval. Electronics. The presence / absence determining means includes
A delay means for delaying a displacement voltage as a voltage corresponding to a displacement position of the operation member; and a voltage difference monitor for monitoring the presence or absence of a displacement operation of the operation member based on a difference between the displacement voltage and an output voltage of the delay means. means,
The electronic apparatus according to claim 1, further comprising:   The electronic device according to claim 1, wherein the controlled object and the controlled variable are a speaker output sound and a volume, respectively. An operation member that is displaced by a user,
Position data reading means for reading displacement position data of the operation member; and adjustment means for adjusting a control object to a control amount corresponding to the displacement position data read by the position data reading means;
A control method for an electronic device comprising:
Determining whether the displacement position of the operating member has changed,
When there is no displacement operation of the operating member, the operation of stopping the position data reading means is stopped in principle, and when there is a displacement operation of the operating member, the position data reading means is operated,
A control method comprising:

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