JP2006091306A - Electronic musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress power consumption low without making usability worse. <P>SOLUTION: Control over power supply from a main power source for some of all functions including at least a mounted playing function is performed according to the result of detection of whether there is a player of an electronic musical instrument or an operator is present at a designated position of the electronic musical instrument. The main power source supplies electric power to all the mounted functions, but is instructed to start or stop supplying the electric power from the main power source to all the mounted functions according to operations of a power switch. After the start of power supply from the main power source is instructed, whether the player or operator is present is detected and the power supply from the main power source to some of all the functions is controlled according to the detection result. Thus, some of functions are placed in a standby state or returned from the standby state to suppress the power consumption without worsening the usability, and thereby energy saving is achieved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic musical instrument having a number of functions including at least a performance function. In particular, it is possible to suppress power consumption without deteriorating usability by automatically controlling the start / stop of the power supply from the power supply for each device that realizes a large number of functions as necessary for each device. It is related with the made electronic musical instrument.

In general, in order to operate a large number of various functions such as a performance function, a display function, or a lighting function in an electronic musical instrument, the electronic musical instrument has various functions that are mounted on the electronic musical instrument. Therefore, it is necessary that power is always supplied from the main power source. In order to start / stop the power supply from the main power source, it is essential to turn on / off a predetermined power switch by the user himself / herself. By the way, when you stop using the electronic musical instrument or when you temporarily stop using it, you often forget to turn off the power switch, especially when children are using it. In spite of the fact that various functions are not being used, power is consumed continuously and electricity costs are incurred. Therefore, recently, an electronic musical instrument having a function of starting or stopping power supply from a main power source without the user's own consciousness turning on / off a predetermined power switch is known. For example, there is an electronic musical instrument described in Patent Document 1 or 2 shown below. The electronic musical instruments described in these documents have a function of automatically turning on / off the main power in response to opening / closing of the lid, and the user simply opens / closes the lid of the electronic musical instrument. The electronic musical instrument can be easily turned on (start of power supply from the main power supply) or powered off (stop of power supply from the main power supply) without being particularly conscious. In other words, even if the user does not consciously turn off the power switch, the electronic musical instrument is automatically turned off simply by closing the lid, which increases power consumption due to forgetting to turn off the power switch. This can be prevented, and energy is saved by this.
Japanese Utility Model Publication No. 49-103817 Japanese Patent Laid-Open No. 9-101783

  In the conventional electronic musical instrument as described above, the function of turning on / off the main power according to the on / off operation of a predetermined power switch or automatically turning on / off the main power according to opening / closing of the lid is an electronic musical instrument. Controls to start / stop power supply to all devices that realize a large number of functions at the same time. When the power is off, power supply to all devices stops. The function was completely stopped. Therefore, even if you want to use only the desired function again, you must turn on the power switch and restart all the functions of the electronic musical instrument from the beginning, which is troublesome. There was a problem that it took time to restart. In addition, for example, the display function and the lighting function are temporarily stopped to enter a standby state (standby state), while the performance function is set to a continuous use state. In the past, it was impossible to partially enter a standby state or a continuous use state, and it was very inconvenient. Therefore, an electronic musical instrument that is easy to use while suppressing power consumption in consideration of these points has been desired.

  The present invention has been made in view of the above points, and controls the start / stop of the power supply from the main power supply to each device that realizes a large number of functions of the electronic musical instrument for each device as necessary. Accordingly, an object of the present invention is to provide an electronic musical instrument that can reduce power consumption without deteriorating usability.

  An electronic musical instrument according to the present invention is an electronic musical instrument having a large number of functions including at least a performance function, and a main power source that supplies electric power, and supply of electric power from the main power source to all the mounted functions A power switch for instructing start and stop, a detection means for detecting whether or not the player of the electronic musical instrument or an operator is present at a predetermined operation position of the electronic musical instrument, and a detection result from the detection means And a control means for controlling power supply from the main power supply for a part of all the installed functions.

  According to the present invention, one of all the functions including at least the performance function mounted according to the detection result of whether or not the player of the electronic musical instrument or the operator exists at a predetermined operation position of the electronic musical instrument. The power supply from the main power source is controlled for the functions of the unit. The main power supply supplies power to all installed functions, but the start and stop of the supply of power from the main power supply are instructed to all the installed functions according to the operation of the power switch. After the start of power supply from the main power source is instructed, it is detected whether or not an electronic musical instrument player or an operator is present at a predetermined operation position of the electronic musical instrument. The power supply from the main power supply to a part of the functions is controlled. In this way, the power supply to the partial function is stopped when it is detected that it does not exist, and the power supply to the stopped partial function is restarted when it is detected that it exists thereafter. By controlling the power supply from each of the functions, it is possible to set some functions to the standby state for each function or to return from the standby state. In this way, by partially setting a part of the functions to the standby state or returning from the standby state, it is possible to save energy by reducing power consumption without deteriorating usability.

  According to the present invention, since the start / stop of the power supply from the power supply to each device that realizes the function mounted on the electronic musical instrument is partially controlled for each device as necessary, the usability is deteriorated. It is possible to achieve an effect that energy consumption can be reduced without reducing power consumption.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a hardware configuration block diagram showing an embodiment of the overall configuration of an electronic musical instrument according to the present invention. FIG. 2 is an external view showing an embodiment of a specific external configuration of the electronic musical instrument according to the present invention. However, here, a keyboard-type electronic musical instrument having a keyboard as a performance operator is shown as an example.

  As shown in FIG. 1, an electronic musical instrument according to the present invention is, for example, a user under the control of a microcomputer comprising a microprocessor unit (CPU) 1, a read only memory (ROM) 2, and a random access memory (RAM) 3. A performance function for generating a musical tone or performing an automatic performance in response to an operation by the user, a display function for displaying various information on the display device 7a, or a sheet of paper placed on the performance operator 6c or a music stand (see FIG. 2) In order to realize a large number of functions such as a lighting function for illuminating a musical score or the like with the lighting device 7b, various devices constituting the electronic musical instrument are controlled. In addition, power is supplied from the main power supply 5a to each device that realizes such a large number of functions. When the power supply is started, each device becomes operable, and power is supplied. The operation of each device is stopped by stopping the operation. In the electronic musical instrument shown in this embodiment, the power supply to each device constituting the electronic musical instrument from the main power supply device 5a can be controlled for each device by the power supply control device 5, for example, a display function or illumination. For functions, the function is paused and put into a standby state (standby state), while for the performance function, only a part of the many functions are in a standby state, such as making the function continue to be used. It is possible to reduce the power consumption and save energy without deteriorating usability.

  The CPU 1 controls the operation of the entire electronic musical instrument. A read-only memory (ROM) 2, a random access memory (RAM) 3, a storage device 4, a power supply control device 5, and an operator scan interface are connected to the CPU 1 via a communication bus 1D (for example, a data and address bus). 6, illuminance control device 7, various sensors (illuminance sensor A (8a), illuminance sensor B (8b), human sensor 8c), sequencer 9, sound source device 10, and sound system 11 are respectively connected. Further, the CPU 1 is connected with a timer 1A for measuring the interrupt time and various times in the timer interrupt process (interrupt process). That is, the timer 1A generates tempo clock pulses for counting time intervals and setting a performance tempo used when performing performance functions such as automatic performance. The frequency of the tempo clock pulse is adjusted by, for example, a tempo setting switch in the panel switch B group 6b. Such a tempo clock pulse from the timer 1A is given to the CPU 1 as a processing timing command or to the CPU 1 as an interrupt command. The CPU 1 executes various processes such as a conventionally known automatic performance process, score display process (not shown), or “power control process” (see FIG. 4 described later) according to these instructions.

  The ROM 2 stores various control programs to be executed or referred to by the CPU 1 and various data. The RAM 3 is used as a working memory for temporarily storing various data generated when the CPU 1 executes a predetermined program, or as a memory for storing a program currently being executed and related data. A predetermined address area of the RAM 3 is assigned to each function and used as a register, flag, table, memory, or the like. The storage device 4 is executed by the CPU 1, for example, automatic performance data that is the basis of a song that is automatically played, musical score data that is the basis of a displayed musical score, or various data such as resist data, timbre data, and effect data. Various control programs and the like are stored. When no control program is stored in the ROM 2, the control program is stored in the storage device 4 and read into the RAM 3, so that the same operation as when the control program is stored in the ROM 2 is performed. Can be executed by the CPU 1. In this way, control programs can be easily added and upgraded. The storage device 4 is not limited to a hard disk (HD), but can be freely attached and detached in various forms such as a flexible disk (FD), a compact disk (CD), a magneto-optical disk (MO), or a DVD (abbreviation of Digital Versatile Disk). It may be a storage device using the external storage medium. Alternatively, a semiconductor memory or the like may be used.

  The main power supply device 5a is a power supply source that supplies power to each device constituting the electronic musical instrument. If the main power supply device 5a is not provided, all functions of the electronic musical instrument cannot be operated. That is, by supplying electric power from the main power supply device 5a to each device constituting the electronic musical instrument, each device can operate and each function can be realized. With the on / off operation of the main power switch 5b, the power supply from the main power supply device 5a is started or stopped for each device constituting the electronic musical instrument. Such a main power switch 5b may be arranged on the upper surface or side surface of the electronic musical instrument as a switch that can be directly operated by the user. It may be arranged at a position where the power can be turned off according to the on / off of the keyboard upper cover F. As a specific example, for example, in a sliding keyboard upper cover F, a “push-down on” type main power switch 5b is disposed in a storage portion of the keyboard upper cover F. In this case, when the keyboard upper lid F is pushed into the storage portion by the user, the “push-on” type main power switch 5b is pushed in together with the completion of the storage, so that the power is automatically turned on, that is, from the main power supply 5a. Power supply is started. On the other hand, when the keyboard upper cover F is pulled out of the storage portion by the user, the “push-on” type main power switch 5b is restored by the return function provided in the switch itself, so that the power is automatically turned off, that is, the main power supply is turned on. The power supply from the device 5a is stopped.

  In the electronic musical instrument shown in this embodiment, power supply to each device is controlled for each device separately from the main power switch 5b that simultaneously controls start / stop of power supply to each device from the main power supply device 5a. A power control device 5 is provided. The power supply control device 5 is for controlling to start or stop power supply to each device from the main power supply device 5a partially. Details of such a power supply control device 5 will be described later, and the description thereof will be omitted (see FIG. 3).

  The panel switch A group 6a and the panel switch B group 6b are an automatic performance start instruction switch / stop instruction switch for instructing start or stop of automatic performance, and a song selection switch for appropriately selecting a music to be automatically performed from a large number of songs. Or, a parameter input switch for individually setting various performance control parameters used for automatic performance such as timbre (voice) and rhythm, a sequence switch for setting the sequence function, and a mode for setting the automatic power control mode (standby mode) It is configured to include various controls such as switches. Of course, as the panel switch A group 6a and the panel switch B group 6b, in addition to the above, the numeric keypad for inputting numeric data and the character data input used for selecting, setting and controlling the pitch, tone, effect, etc. Various operators such as a keyboard or a pitch bend wheel or a slider capable of setting a pitch bend value corresponding to the operation amount may be included. These panel switches have a panel switch A group 6a that is always supplied with power from the main power supply device 5a when the main power switch 5b is on, and the power supply from the main power supply device 5a is temporarily stopped according to conditions. It can be divided into panel switch B group 6b. When the operation state of each switch of the panel switch A group 6a and the panel switch B group 6b is detected by the operator scanning interface 6, switch information corresponding to the operation state is transmitted to the CPU 1 and the power control device via the communication bus 1D. 5b is output. That is, the panel switch A group 6a is an operator group in which an operator scan is always performed by the operator scan interface 6 when the main power switch 5b is in an on state, and control corresponding to the operation is performed. On the other hand, the panel switch B group 6b is an operator group in which the operator scan is not performed by the operator scan interface 6 depending on conditions even when the main power switch 5b is on, and control according to the operation is not performed. is there. The performance operator 6c is, for example, a keyboard or a pedal having a plurality of keys for selecting the pitch of a musical tone, and has a key switch corresponding to each key. 6c (keyboard, etc.) can be used for manual (hand-playing) performance by the user, as well as for inputting various device settings and various performance control parameters used for automatic performance. It can also be used as an input means.

  The display device 7a is a display composed of, for example, a liquid crystal display panel (LCD) equipped with a backlight. The display device 7a is a current device setting state, data information such as automatic performance data that can be automatically played, and current performance control parameters. The setting state or the control state of the CPU 1 is displayed. The illuminating device 7b is, for example, a table-type illuminator for illuminating a musical score or a performance operator (keyboard or the like) 6c placed on a music stand (see FIG. 2 described later). The illuminance control device 7 is a device for appropriately adjusting the illuminance (also referred to as light intensity) from the backlight of the display device 7a or the illumination device 7b, and includes the illuminance sensor A (8a) and the illuminance sensor B (8b). Adjust the brightness according to the measurement result. The illuminance sensor A (8a) is disposed at a predetermined position within a range where the light emitted from the illumination device 7b does not reach so as not to be affected by the light from the illumination device 7b (see FIG. 2), and the electronic musical instrument Is a sensor that can measure, for example, the brightness of a room. The illuminance sensor B (8b) is disposed at a predetermined position within the range illuminated by the light emitted from the illuminating device 7b (see FIG. 2) so that the illuminance of the illuminating device 7b can be appropriately measured. It is a sensor. In addition to such sensors, a human sensor 8c is disposed at an appropriate position on the front side (performer or operator side) of the electronic musical instrument, and the human sensor 8c is a predetermined position around the electronic musical instrument (for example, It is a sensor such as an infrared sensor that senses whether or not a performer (or operator) is present on the front.

  The sequencer 9 is for generating or recording performance information that is the basis of automatic performance. The tone generator device 10 can simultaneously generate musical sound signals on a plurality of channels, and is generated from performance information generated in response to the operation of the performance operator 6c given by the user via the communication bus 1D or from the sequencer 9. The received performance information is input, and a musical sound signal is generated based on the performance information. The musical tone signal generated from the sound source device 10 is subjected to predetermined digital signal processing, and the musical tone signal subjected to the signal processing is given to a sound system 11 including an amplifier, a speaker and the like to be sounded. An effect circuit (not shown) may be arranged between the sound source device 10 and the sound system 11 to give various effects to the musical sound signal generated from the sound source device 10. Any conventional configuration may be used as the configuration of the sound source device 10 and the sound system 11 (and the effect circuit). For example, the tone generator 10 may employ any of various tone synthesis methods such as FM, PCM, physical model, formant synthesis, etc., may be configured with dedicated hardware, or configured with software processing by the CPU 1. May be.

The main power switch 5b is not limited to the one described above, and may be one that automatically turns on / off the power by the weight of the keyboard top cover F, for example. As a specific example, for example, when the keyboard upper lid F is closed, a “push-off” type main power switch 5b is arranged on the electronic musical instrument main body side, which is a point where the tip portion of the keyboard top lid F lands. In this case, when the keyboard upper cover F is closed by the user, the "push-off" type main power switch 5b is lowered by the weight of the keyboard upper cover F, so that the power is automatically turned off and power is supplied from the main power supply 5a. Is stopped. On the other hand, when the keyboard upper cover F is opened by the user, the "push-off" type main power switch 5b is restored by the return function provided in the switch itself, so that the power is automatically turned on and the power from the main power supply 5a is restored. Supply is started.
In the electronic musical instrument described above, the performance operator 6c is not limited to a keyboard instrument, but may be any type of instrument such as a stringed instrument, a wind instrument, or a percussion instrument.
The electronic musical instrument according to the present invention is not limited to one in which each device is built in one electronic musical instrument body, and each device is configured separately and is connected to each device using communication means such as an external interface or various networks. It may be configured as follows.

  Next, control of power supply from the main power supply device 5a to each device constituting the electronic musical instrument by the power supply control device 5 will be briefly described with reference to FIG. FIG. 3 is a block diagram illustrating an example of power supply control by the power supply control device 5. Hereinafter, according to the block diagram shown in FIG. 3, control of power supply from the main power supply 5a to each device constituting the electronic musical instrument will be described. Here, each device constituting the electronic musical instrument is divided into one of four control blocks B1 to B4 as a target to be supplied with power. In FIG. 3, the supply switch A (SW1) and the supply switch B (SW2) are hardware such as the main power switch 5b and the panel switch A or B group (6a, 6b) actually arranged on the electronic musical instrument. This is a virtual switch representing that the power supply control device 5 is controlled to virtually turn on / off the power supply.

  First, when the keyboard upper lid F of the electronic musical instrument is slid and opened by the user (performer or operator), the main power switch 5b is turned on in accordance with the final pushing operation of the keyboard upper lid F. Then, the power supply control device 5 is notified of the power-on of the main power supply device 5a, and the power supply control device 5 turns on both the supply switch A (SW1) and the supply switch B (SW2) accordingly and supplies the power from the main power supply device 5a. Control is performed so that the generated power is supplied to each device and storage device 4 constituting the electronic musical instrument included in the control block B1 to control block B4. Separately from this, power is also supplied directly to the control device such as the CPU 1 from the main power supply 5a. As a result, all the functions realized by the devices constituting the electronic musical instrument can be started anytime. Each time the performance operator 6c or the panel switch A group 6a included in the control block B3 to which power is constantly supplied is operated by the user, the power controller 5 is notified of which operator has been operated.

  When there is no notification from each device included in the control block B3 for a certain time (for example, 3 minutes), that is, when the performance operator 6c or the panel switch A group 6a is not operated for a certain time, The power supply control device 5 turns off both the supply switch A (SW1) and the supply switch B (SW2). As a result, power is not supplied from the main power supply device 5a to the devices included in the control blocks B1, B2, and B4 except the control block B3, and these devices are realized by the devices as standby states. Temporarily stop the function to enter standby mode. That is, in the standby state, even if each device included in each control block B1, B2, B4 is operated by the user, an operation for realizing each function is not performed according to the operation. In such a standby state, when the performance operator 6c or the panel switch A group 6a included in the control block B3 to which power is constantly supplied from the main power supply 5a is newly operated by the user, the power The control device 5 turns on both the supply switch A (SW1) and the supply switch B (SW2). Thereby, each device included in each control block B1, B2, B4 returns from the standby state, and an operation for realizing each function is performed according to the operation. That is, it returns to a state where all functions of the electronic musical instrument can be used.

  In addition, the human sensor 8c included in the control block B3 to which power is always supplied from the main power supply device 5a determines whether or not there is a user (performer or operator) who intends to use the electronic musical instrument for a predetermined time. The check is periodically made every time, and if there is a user, the fact is notified to the power supply control device 5. If there is no such notification for a certain time (for example, 3 minutes), that is, if there is no user who intends to use the electronic musical instrument for a certain time or longer, the power control switch 5 is switched to the supply switch A ( Both SW1) and supply switch B (SW2) are turned off. Accordingly, each of the control blocks B1, B2, and B4 except for the control block B3 is similar to the case where the notification from each device included in the control block B3 is not performed for a predetermined time (for example, 3 minutes). No power is supplied to the devices, and these devices are in a standby state. When the human sensor included in the control block B3 to which power is supplied newly detects the presence of the performer (or operator), the power supply control device 5 supplies the supply switch A (SW1) and the supply switch B (SW2). Both on. Thereby, it returns from a standby state, and returns to the state which can utilize all the functions of the said electronic musical instrument.

  The sequencer 9 included in the control block B1 notifies the power supply control device 5 of the current operation status related to automatic performance, which is a function that the sequencer 9 has. The operation status of the automatic performance notified from the sequencer 9 is notified that the operation is stopped, and the performance operator 6c or the panel switch A group 6a included in the control block B3 is not operated. In this case, the power supply control device 5 turns off both the supply switch A (SW1) and the supply switch B (SW2). As a result, power is not supplied from the main power supply device 5a to the devices included in the control blocks B1, B2, and B4 except the control block B3, and these devices are realized by the devices as standby states. Temporarily stop the function to enter standby mode. That is, the sequencer 9 is also in a standby state, and even if operated by the user, an operation for realizing a function related to automatic performance is not performed according to the operation. When the performance operator 6c or the panel switch A group 6a included in the control block B3 to which power is always supplied from the main power supply device 5a is newly operated by the user in the standby state, the power supply control device 5 Turns on both supply switch A (SW1) and supply switch B (SW2). As a result, the sequencer 9 also returns from the standby state, and an operation for realizing a function related to automatic performance is performed according to the operation.

  The illuminance sensor A (8a) and the illuminance sensor B (8b) included in the control block B4 are each regularly (for example, once a second) and the brightness of the room and the illuminance (or luminous intensity) from the lighting device 7b. The brightness control device 7 is notified of brightness, illuminance, and the like as a result of sensing. The illuminance control device 7 adjusts the backlight of the display device 7a and the illuminance of the illumination device 7b based on the notification from the illuminance sensor A (8a) and / or the illuminance sensor B (8b). In this way, it is possible to automatically adjust the backlight of the display device 7a and the illuminance of the lighting device 7b so that the brightness is most easily seen by the user according to the surrounding environment. As described above, with respect to the illuminance control device 7, the illuminance sensor A (8a), and the illuminance sensor B (8b) included in the control block B4, there is no notification from each device included in the control block B3 for a certain period of time. In this case, the standby state is set. That is, it is turned off.

  When the keyboard upper lid F is slid and closed by the user, the main power switch 5b is turned off. When the main power supply 5a is turned off, no power is supplied to the power supply control device 5, and accordingly, all the devices included in the control blocks B1 to B4 are also supplied with power. Disappear. Of course, no power is supplied to the CPU 1 or the storage device 4 from the main power supply 5a. Thereby, all the functions of the electronic musical instrument are stopped.

In the above-described embodiment, the supply switch A (SW1) is used to stop the power supply for each function included in the control block B1 and the control block B2. However, the present invention is not limited to this, and is included in the control block B1. The power supply may be stopped for the functions included in the control block B2 while the power supply is continued for the functions to be performed. In such a case, only lighting is turned off, and processing such as automatic performance is continued. Further, the user may appropriately select a target to stop power supply, and the power supply may be stopped according to the selection.
The setting of each device to the standby state or the return from the standby state is based on one of the notifications as to whether or not either the performance operator 6c or the panel switch A group 6a included in the control block B3 is being operated. Alternatively, the determination may be made based on notifications from both the performance operator 6c and the panel switch A group 6a.
When each device is set to the standby state, the device state at the time of standby setting is stored in the storage device 4, and when returning from the standby state, the device state at the time of standby setting stored in the storage device 4 is stored. It goes without saying that each device is restored to the state immediately before being set to the standby state by reading.
Note that when the standby state is entered, the frequency of the operation operator's operation scan may be reduced or stopped.

  Next, “power control processing” executed by the electronic musical instrument shown in FIG. 1 will be described with reference to FIG. FIG. 4 is a flowchart showing an example of the “power control process”. The “power control process” shown in this embodiment performs power supply control from the main power supply device 5a for each device (each device included in the control blocks B1 to B4) constituting the electronic musical instrument. Thus, the setting of each device to the standby state and the return from the standby state are performed. Hereinafter, according to the flowchart shown in FIG. 4, the detailed operation of the “power control process” will be described. This “power control process” is executed by the power control device 5, and the process is started at the same time as the main power switch 5b of the electronic musical instrument is turned on, and the main power switch 5b of the electronic musical instrument is turned off. This is a process that is repeatedly executed as an interrupt process at a predetermined time interval until it is executed.

  In step S <b> 1, it is determined in advance whether or not the “automatic power control mode (standby mode)” is set as a device setting by the user. If the “automatic power control mode” has been set by the operation of the mode switch by the user (YES in step S1), the detection information regarding the presence of a person from the human sensor 8c, or the performance operator 6c and the panel switch The detection information regarding the operation of any one of the group A (6a) by the user is acquired, whether or not a person is present in front of the electronic musical instrument, or the performance operator 6c and the panel switch A group ( It is determined whether any one of 6a) has been operated by the user (step S2). If it is determined that a person is present in front of the electronic musical instrument or that either the performance operator 6c or the panel switch A group (6a) is operated by the user (YES in step S2), the variable timer Time is added to the value T1, and the variable timer value T2 is cleared (step S3). The timer value T1 is for measuring the time that a person is in front of the electronic musical instrument. On the other hand, the timer value T2 is used to measure the time when there is no person in front of the electronic musical instrument, or the time since the performance operator 6c or the panel switch A group (6a) is last operated by the user. Is.

  In step S4, it is determined whether or not the timer value T1 is greater than or equal to a predetermined time length Tx (a time length determined by the user or a time length determined by default, for example, 3 seconds). If the timer value T1 is not equal to or greater than the time length Tx (NO in step S4), the process ends. If the timer value T1 is greater than or equal to the time length Tx (YES in step S4), it is determined whether or not the value of the illuminance sensor A (8a) is equal to or less than a predetermined reference value (step S5). If the value of the illuminance sensor A (8a) is not less than or equal to the reference value (NO in step S5), the process jumps to step S8. On the other hand, when the value of the illuminance sensor A (8a) is equal to or less than the reference value (YES in step S5), an output value for obtaining an appropriate illuminance from the output values of the illuminance sensor A (8a) and the illuminance sensor B (8b) is obtained. It calculates (step S6), and requests the illuminance control device 7 to control the illuminance of the backlight of the display device 7a and the illumination device 7b based on the calculated output value (step S7). For example, the illuminance control device 7 calculates the difference between the calculated output value and the current illuminance, and changes the illuminance step by step to the calculated illuminance after a certain time, or is constant at certain time intervals. The illuminance of the display device 7a and the illuminance of the lighting device 7b are controlled by changing the illuminance value by value and changing the illuminance to reach the target illuminance. In step S8, all other functions other than the lighting function turned on in step S7 are turned on. For example, power supply from the main power supply 5a is started, and each control block B1, B2, B4 other than the control block B3 including the human sensor 8c, the performance operator 6c, and the panel switch A group (6a) (see FIG. 3). ) Turn on the function of each device included, that is, return from the standby state. Alternatively, the on state is maintained as it is.

  If it is determined in step S2 that no person is present in front of the electronic musical instrument or that either the performance operator 6c or the panel switch A group (6a) is not operated by the user, that is, the electronic instrument When the instrument is not used (NO in step S2), time is added to the variable timer value T2 and the variable timer value T1 is cleared (step S9). In step S10, it is determined whether or not the timer value T2 is greater than or equal to a predetermined time length Ty (for example, 3 minutes). If the timer value T2 is not equal to or greater than the time length Ty (NO in step S10), the process ends. When the timer value T2 is equal to or longer than the time length Ty (YES in step S10), the control blocks B1 and B2 other than the control block B3 including the human sensor 8c, the performance operator 6c, and the panel switch A group (6a). , B4 (see FIG. 3), the function of each device is turned off (step S11). That is, the power supply from the main power supply device 5a is stopped and the standby state is set.

  As described above, the electronic musical instrument shown here includes the power supply control device 5 for individually controlling the power supply to each device constituting the electronic musical instrument, in addition to the main power switch 5b. The power supply control device 5 has a timer function that is reset in accordance with detection information from a control block B3 (see FIG. 3) including a human sensor 8c, a performance operator 6c, and a panel switch A group (6a). When a predetermined time elapses, the power supply of partial functions is stopped to set each device included in the control blocks B1, B2, and B4 other than the control block B3 to a standby state. When it is detected from the control block B3 that the user is present in front of the electronic musical instrument or the performance operation element 6c or the panel switch A group (6a) is operated, the power supply is started, and the standby state is established. It is possible to return from.

In the embodiment described above, the power supply control device 5 configured separately from the CPU 1 executes power supply control (specifically, power control processing) from the main power supply device 5a to each device constituting the electronic musical instrument. Although what was shown was shown, it is not restricted to this. For example, the CPU 1 may perform power supply control processing so that the CPU 1 controls power supply to each device. In such a case, all the devices other than the CPU 1 including the storage device 4 can be set in a standby state, which is advantageous because energy can be further saved.
Note that each device may be set to a standby state according to the state of the automatic performance function. For example, the sequencer 9 notifies the power supply control device 5 of the state of automatic performance, and the power supply control device 5 includes a human sensor 8c, a performance operator 6c, and a panel switch A group (6a) for a predetermined time or longer. From the control block B3 (see FIG. 3), the sequencer 9 does not detect that the user is present in front of the electronic musical instrument or that the performance operation element 6c or the panel switch A group (6a) is operated. When the automatic performance is not performed, the devices included in the control blocks B1, B2, and B4 other than the control block B3 are set to the standby state.
It should be noted that brightness around the electronic musical instrument may be detected together with detection of a person, and each device may be set in a standby state or released from the standby state according to the result of both.
In addition, when it becomes the state which does not detect a person during automatic performance, it is also considered that the user continues to enjoy the current automatic performance as a BGM or the like at a distant position (a position where it cannot be detected). Therefore, in such a case, it may be possible to control the devices other than those related to the human sensor and the automatic performance, such as a lighting device and a performance operator, to be turned off.

1 is a block diagram of a hardware configuration showing an example of the overall configuration of an electronic musical instrument according to the present invention. It is the external view which showed one Example of the specific external appearance structure of the electronic musical instrument which concerns on this invention. It is a block diagram which shows an example of the electric power supply control by a power supply control apparatus. It is a flowchart which shows one Example of a power supply control process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... CPU, 1A ... Timer, 2 ... ROM, 3 ... RAM, 4 ... Storage device, 5 ... Power supply control device, 5a ... Main power supply device, 5b ... Main power switch, 6 ... Operator scanning interface, 6a ... Panel switch A group, 6b ... Panel switch B group, 6c ... Performance controller, 7 ... Illuminance control device, 7a ... Display device, 7b ... Illumination device, 8a ... Illuminance sensor A, 8b ... Illuminance sensor B, 8c ... Human Sense sensor, 9 ... sequencer, 10 ... sound source device, 11 ... sound system, 1D ... communication bus, B1-B4 ... control block, F ... keyboard lid, SW1 ... supply switch A, SW2 ... supply switch B

Claims (3)

An electronic musical instrument equipped with a number of functions including at least a performance function,
A main power supply for supplying power;
A power switch for instructing to start and stop the supply of power from the main power supply for all the functions installed;
Detecting means for detecting whether or not there is an operator at a predetermined operation position of the electronic musical instrument player or the electronic musical instrument;
An electronic musical instrument comprising: a control unit that controls power supply from the main power supply to a part of all the mounted functions according to a detection result from the detection unit.   2. The control unit according to claim 1, wherein the control unit sets power supply from the main power supply to set a part of functions to a standby state for each function or to return from a standby state. Electronic musical instrument. Comprising a lighting device and detection means for detecting brightness;
The control means controls power supply from the main power source to the lighting device and / or illuminance in the lighting device according to both results of the detection means and the detection means. The electronic musical instrument according to 1 or 2.

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