JPH07134581A - Display device for electronic instrument - Google Patents

Abstract

PURPOSE:To provide a display device for an electronic instrument suppressing power consumption by flashing on/off a display part displaying a setting value when no switch adjusting the volume, etc., is operated. CONSTITUTION:A CPU checks switch operation over a prescribed period, and turnes on/off an LED flashing on/off flag according to the presence of the operation. The LED flashing on/off flag is checked repeatedly by an interruption process (S51), and when off, an LED is lighted (S52). On the other hand, when the LED flashing on/off flag is turned on, the LED is lighted or switched off according to an LED lighting flag (S53-S55). Then, an LED lighting ON/OFF counter is subtracted, and when a count value becomes zero, the LED lighting flag is inverted, and the LED lighting ON/OFF counter is reset (S56-S59). Thus, the LED becomes a flashing on/off state after a prescribed time elapes after a switch is operated, and the power consumption is suppressed. However, no impediment exists in the confirmation of the display.

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 an electronic musical instrument for displaying a setting state of the electronic musical instrument.

[0002]

2. Description of the Related Art Conventionally, in electronic musical instruments, various setting states changed by switches, such as volume level and accompaniment rhythm type, are numerically displayed by a 7-segment LED or the like so that the set values can be seen at a glance. I am doing it.

[0003]

However, in the conventional electronic musical instrument, since some kind of display is always made by the above-mentioned LED, regardless of whether or not the performer needs such a display, A certain amount of power was constantly consumed. Especially for small portable electronic instruments,
In many cases, a dry battery is used as the power source, and there is a problem that the life of the battery is shortened by the lighting of the LED and the time during which continuous performance is possible is shortened.

Therefore, an object of the present invention is to provide a display device for an electronic musical instrument, which displays information only when it is necessary for operation and suppresses power consumption.

[0005]

SUMMARY OF THE INVENTION The present invention, which has been made to achieve the above-mentioned object, is an electronic device which, when a switch is operated to set a state of an electronic musical instrument, displays the set state by lighting a light emitting means. In a musical instrument display device, switch operation detecting means for detecting operation of the switch, elapsed time measuring means for measuring time elapsed after the switch operation is detected by the switch operation detecting means, and the elapsed time measurement And a power saving means for suppressing power consumption of the light emitting means when the time measured by the means exceeds a predetermined time.

[0006] Here, as described in claim 2, it is preferable that the power saving means is an extinguishing means for extinguishing the light emitting means. Alternatively, as described in claim 3, the power saving means may be blinking means for blinking the light emitting means. Further, as described in claim 4, when the switch is an up-down switch, it is particularly convenient to apply the electronic musical instrument display device of claim 3.

[0007]

According to the display device for an electronic musical instrument of the present invention having the above structure, the power consumption of the light emitting means is suppressed when a predetermined time or more elapses after the switch is not operated. Therefore, while the switch is being operated to adjust the setting status of the electronic musical instrument, the display is displayed in a normal lighting state, and is saved when the switch for adjusting the setting status is not operated, for example, when playing is started. The power is displayed.

In particular, according to the apparatus of claim 2, since the light emitting means is turned off, the power consumption by the light emitting means is completely eliminated. Further, according to the device of the third aspect, since the light emitting means blinks, power consumption for the extinguishing period is eliminated. Moreover, it is possible to confirm the set state during the lighting period. In particular, if the blinking pitch is made extremely fast, the player will see the light emitting means as being lit in a dark state.

In addition, it is desired that the up / down switch confirms a set value or the like before the up / down operation, and then selects whether to perform the up operation or the down operation. The blinking display of the value makes it easy to check.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. An electric guitar 1 as an example is shown in FIG.
As shown in FIG. 2, a main body 5 having the iron strings 3 has a pickup 7 for detecting the vibration of the iron strings 3 as analog information,
A card slot 11 into which a ROM card 9 in which an accompaniment pattern is recorded as digital information is mounted, an electronic sound source circuit 13 centering on a CPU, and a mixing unit 15 which mixes output signals from the electronic sound source circuit 13 and the pickup 7.
An amplifier circuit 17 that amplifies the signal mixed by the mixing unit 15, a speaker 19 that emits sound based on the signal amplified by the amplifier circuit 17, and a headphone 21. Headphone terminal 23 used by switching to and electronic sound source circuit 1
Operation panel 2 for specifying various condition settings for 3
5, a MIDI terminal 27, and a dry battery 29 for power supply.

The pickup 7 is provided for each of the iron strings 3 and detects a magnetic field change caused by the vibration of the iron strings 3 and outputs it as an analog signal. The electronic tone generator circuit 13 includes a CPU 30, a program memory 31, a tone waveform memory 32, a RAM 33, an automatic performance data memory 34, a tone generator circuit 35, a card interface circuit 36, a panel interface circuit 37, M.
IDI interface circuit 38 and D / A conversion circuit 3
9 is equipped. Further, a voltage adjusting circuit 41 which takes in a part of the signal from the pickup 7 and adjusts it so as to be a voltage in the range of 0 to 5V, and an A / D which converts an analog signal from the voltage adjusting circuit 41 into a digital signal. Converter 4
3 is also provided.

The program memory 31 stores a control processing program for performing accompaniment. The musical tone waveform memory 32 stores information relating to musical tone waveforms of various musical instruments such as drums and bass necessary for accompaniment. RA
M33 is for temporarily storing data and the like when executing various arithmetic processes. The automatic performance data memory 34 is a ROM that stores some rhythm patterns and the like in advance. The tone generator circuit 35 has a plurality of parallel tone generation channels and outputs a digital tone signal from the tone waveform data read from the tone waveform memory 32 and the accompaniment data read from the automatic performance data memory 34 or the card interface circuit 36. It is a circuit to do. The card interface circuit 36 is a circuit that is connected to the card slot 11 and reads the stored contents of the ROM card 9. The panel interface circuit 37 is
This circuit is connected to the operation panel 25 and reads an instruction from the operation panel 25. The MIDI interface circuit 38 is connected to the MIDI terminal 27 and outputs the performance data read from the automatic performance data memory 34 or the ROM card 9 to an external MIDI compatible device, or conversely, the performance data from an external MIDI compatible device. Or type. The performance data input from an external MIDI-compatible device can be processed for accompaniment like the data read from the automatic performance data memory 34 or the ROM card 9. The D / A conversion circuit 39 is for converting the digital signal output from the tone generator circuit 35 into an analog signal.

The mixing section 15 is provided with a variable resistance type guitar volume adjusting circuit 15a for adjusting the strength of the analog signal detected by the pickup 7. An operational amplifier 16 for adjusting the impedance of the circuit is provided between the volume adjusting circuit 15a and the pickup 7. The operational amplifier 16 also has a role of adjusting the volume of the accompaniment sound. A branch point 15b for branching a signal to the above-mentioned voltage adjusting circuit 41 is also provided at a position downstream of the guitar volume adjusting circuit 15a. A mixing point 15c for mixing the signal from the D / A conversion circuit 39 described above is provided at a position downstream of the branch point 15b.

The operation panel 25 includes a rhythm volume switch 51 for adjusting the volume of the accompaniment pattern generated by the electronic tone generator circuit 13, a tempo switch 52 for adjusting the tempo of the pattern, and a transformer for transposing the pattern. The pause switch 53, the select switch 54 for pattern selection, the part mute switch 55 for muting a predetermined part, the automatic performance data memory 34, and the ROM card 9 are selected as accompaniment data. Changeover switch 56 for changing over
And a guitar volume switch 57 and other switches 58 for adjusting the guitar volume, and a display section 59. Each of the rhythm volume switch 51, the tempo switch 52, the transpose switch 53, and the select switch 54 is composed of a pair of button switches, and is configured to increase / decrease the volume or change the tempo by an up / down instruction. . Each of the part mute switch 55 and the changeover switch 56 is composed of one button switch, and is configured to sequentially change the selection content. The display unit 59 is a two-digit number display window including two sets of 7-segment LEDs. The display unit 59 displays the setting contents according to the operation of each of the switches 51 to 56.

Next, the processing contents of the CPU 30 will be described. FIG. 3 shows the main routine. CPU30
When the power is turned on, first, initialization processing is executed (S10). In this process, the contents stored in the RAM 33 are cleared, and the state of the sound source (rhythm volume, tempo, transpose, rhythm pattern select, part mute setting, etc.) is initialized. In this initial setting, assuming that the volume of the guitar is the reference value, the rhythm volume is initially set in consideration of the balance with the reference value.

Next, switch event processing is executed (S20). The details of the processing in S20 are as shown in FIG. In this process, the operation states of the switches 51 to 58 on the operation panel 25 are scanned (S2
1) If any switch is operated (S
22: YES), processing corresponding to each switch, for example, rhythm pattern selection is executed (S23). Since the switch has been operated, the LED blinking flag is turned off (S24), and the LED blinking counter is cleared (S2).
5). Both the LED blinking flag and the LED blinking counter are stored in the RAM 33, and in the processing described later,
It is used to determine whether to switch the display unit 59 to the power saving display. When S24 and S25 are executed, the power-saving display on the display unit 59 is canceled and the normal lighting state is displayed. Next, the LED processing is executed, and the setting contents by the operated switch are displayed on the display unit 5.
It is displayed in 9 as a two-digit number (S26). The player can set an arbitrary rhythm pattern, rhythm volume, etc. by moving the numbers up and down while checking the numbers displayed on the display unit 59. If the switch is not operated (S22: N
O) and S23 to S25 are not executed.

When the sound source setting by the performer is completed in this way, the automatic performance process shown in FIG. 3 is started (S3).
0). The automatic performance process is exactly the same as that performed by a normal rhythm box or electronic musical instrument, and the process will be briefly described below. The accompaniment pattern data is read from either the automatic performance data memory 34 or the ROM card 9 according to the setting of the rhythm pattern selection, the musical tone waveform is read from the musical tone waveform memory 32 according to the note-on data, and further set by switch event processing. Considering the set rhythm volume, tempo, transpose, part mute setting, and the like, and the volume level determined by the note-on data itself, the tone data including the envelope is set for each tone in the empty channel of the tone generator circuit 35. On the other hand, when note-off data is read, the volume level of the channel for which note-off is instructed by this data is set to "0". Sound source circuit 35
In this way, based on the musical tone data set according to the note-on data in this manner, the drum outputs a digital signal that changes peculiar to the drum, and stops the output in accordance with the note-off instruction. The digital signal thus output is
The analog signal is converted by the D / A conversion circuit 39, amplified by the amplifier circuit 17, and emitted from the speaker 19.
In this way, it functions as a rhythm box.

After the above processing is completed, other processing is executed if necessary (S40). As other processing,
In this embodiment, in particular, the process of determining whether or not the condition for switching the display unit 59 to the power saving display is satisfied is executed. In this process, as shown in FIG.
The value of the blinking counter is checked (S41). Here, if the LED blinking counter has not reached the predetermined value (S4
1: NO), the LED blinking counter is counted up (S42), and this process ends and the process returns to S20 in FIG. Therefore, the count value increases in S42 until the LED blinking counter reaches a predetermined value, and
When the switch is operated, the processing of clearing the counter in S25 is repeated. As a result of repeating such processing, if the LED blinking counter reaches the predetermined value (S41: YES), the LED blinking flag is turned on (S43), and the LED lighting ON / OFF counter is set to the predetermined value ( S44). That is, S4
3, S44 is executed when no switch operation is performed for a predetermined time. Note that S4
The blinking cycle of the display unit 59 is set according to the value set in the LED lighting ON / OFF counter in 4.

Now, the CPU 30 executes a timer interrupt process at a predetermined timing, separately from the main routine. In this process, it is determined whether the display unit 59 is kept on or blinks. First, as shown in FIG.
It is checked whether the LED blinking flag is off (S51). If the LED blinking flag is off (S5
1: YES), the display unit 59 is kept in a state of being continuously lit (S52). On the other hand, if the LED blinking flag is on,
It is checked whether the LED lighting flag is off (S53). The LED lighting flag is a flag used for switching the lighting and extinction of the display unit 59 in order to blink the display unit 59, and when it is off, the display unit 59 is extinguished (S
54), if it is on, the display unit 59 is lit (S5
5). Then, the LED lighting ON / OFF counter previously set in S44 is decremented (S56). Next, the LED lighting ON / OFF counter is checked (S57), and if the counter value is zero (S5)
7: NO), the LED lighting flag is inverted (S58),
The LED lighting ON / OFF counter is reset (S59).

As described above, by the processing of S51 to S59, LE
If the D blinking flag is off, the display unit 59 is in a state of continuously lighting, and if the LED blinking flag is on,
The display unit 59 is in a state of blinking at time intervals according to the value set in the LED lighting ON / OFF counter. Here, the value to be set in the LED lighting ON / OFF counter may be different between ON and OFF so that the lighting and extinguishing periods are different. If the turn-off period is set longer than the turn-on period, the effect of suppressing power consumption is high. Also, if the counter value is made extremely small, it appears to the performer that the brightness of the display unit 59 has simply decreased, rather than blinking.
Therefore, the point where the display content can always be confirmed is the same as when the light is kept on, and the power consumption is suppressed more than when the light is kept on.

Although the processing by the CPU 30 has been described above, the function of the electric guitar is executed regardless of the flow of this processing. That is, the vibration of the iron string 3 detected by the pickup 7 is given to the mixing unit 15 as an analog signal and mixed with the accompaniment pattern converted into the analog signal. At this time, the volume of the electric guitar is adjusted to the volume intended by the player by passing through the guitar volume adjusting circuit 15a before mixing. If the accompaniment pattern is not selected, it can be used as a simple electric guitar.

As described above, according to the electric guitar of this embodiment, after a while after the adjustment of the switch is completed,
The display unit 59 is in a blinking state, and power consumption for the turn-off period is eliminated. Therefore, the battery lasts longer and the continuous playing time becomes longer. Also, when changing the accompaniment rhythm or volume, the current set value must be raised or lowered. However, even if the display unit 59 is in the power saving display state, the current set value is displayed in blinking. Therefore, the player can easily change the setting while checking the blinking numbers on the display unit 59.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modes can be adopted without departing from the scope of the present invention. For example, in the embodiment, the method of blinking the display unit 59 for power saving is shown, but if it is simply turned off, the power consumption is further suppressed. However, since the setting state can be confirmed only after the switch is re-operated, it is more convenient to blink as in the embodiment when changing the set value with one touch using an up / down switch or the like.

Further, as a power saving display method of the display unit 59, it may be possible to switch between off and blinking.
By doing so, the display can be blinked when necessary, and turned off when unnecessary to suppress power consumption. Furthermore, the power saving display may be switched so as not to be displayed. In this way, the power-saving display is usually used, and the power-saving display can be prohibited only when, for example, when playing in a bright place and the display is difficult to see due to a decrease in brightness due to blinking.

[0025]

As described above, according to the present invention, when the switch is not operated, the power consumption of the light emitting means is suppressed,
Power is not wasted. In particular, the display device according to claim 2 is highly effective in suppressing power consumption, and the display device according to claim 3 is effective in suppressing power consumption.
It is easy to use because you can check the display. Therefore, even with the configuration according to the fourth aspect, the up / down switch can be easily operated while confirming the display.

[Brief description of drawings]

FIG. 1 is a front view showing the appearance of an electric guitar of an embodiment.

FIG. 2 is a block diagram showing the internal circuit configuration of the electric guitar of the embodiment.

FIG. 3 is a flowchart of a main routine in the electric guitar of the embodiment.

FIG. 4 is a flowchart of a switch event process in the electric guitar of the embodiment.

FIG. 5 is a flowchart of performance operation check and power-off processing in the electric guitar of the embodiment.

FIG. 6 is a flowchart of a power saving display process in the electric guitar of the embodiment.

[Explanation of symbols]

1 ... Electric guitar, 3 ... Iron string, 5 ... Main body,
7 ... Pickup, 9 ... ROM card, 11 ...
..Card slots, 13 ... Electronic sound source circuits, 15.
..Mixing part, 15a ... Guitar volume adjusting circuit,
15b ... Branching point, 15c ... Mixing point, 17 ... Amplifying circuit, 19 ... Speaker, 2
1 headphone, 23 headphone terminal, 25
... Operation panel, 27 ... MIDI terminal, 29 ...
・ Batteries, 30 ... CPU, 31 ... Program memory, 32 ... Music waveform memory, 33 ... RAM,
34 ... Automatic performance data memory, 35 ... Sound source circuit, 36 ... Card interface circuit, 37 ...
Panel interface circuit, 38 ... MIDI interface circuit, 39 ... D / A conversion circuit, 41 ...
Voltage adjusting circuit, 43 ... A / D converter, 51 ... Rhythm volume switch, 52 ... Tempo switch,
53 ... Transpose switch, 54 ... Select switch, 55 ... Part mute switch, 56
... Changeover switch, 57 ... Guitar volume switch, 58 ... Other switches, 59 ... Display section.

Claims (4)

[Claims] 1. A display device for an electronic musical instrument, which displays the set state by lighting a light emitting means when the state of the electronic musical instrument is set by operating the switch, and switch operation detecting means for detecting the operation of the switch. An elapsed time measuring means for measuring a time elapsed after the switch operation is detected by the switch operation detecting means, and the light emitting means when the time measured by the elapsed time measuring means exceeds a predetermined time. And a power saving means for suppressing power consumption of the electronic musical instrument display device. 2. The display device for an electronic musical instrument according to claim 1, wherein the power saving unit is an extinguishing unit for extinguishing the light emitting unit. 3. The display device for an electronic musical instrument according to claim 1, wherein the power saving unit is a blinking unit that blinks the light emitting unit. 4. The display device for an electronic musical instrument according to claim 3, wherein the switch is an up / down switch.