KR102468128B1 - Piano practice device that can be linked with multiple displays - Google Patents

Abstract

A piano practice device capable of interlocking with a plurality of displays is disclosed. A piano practice device capable of interlocking with a plurality of displays according to the present invention includes a housing in which a plurality of keyable piano keys are arranged left and right; a coupling part provided at the rear of the housing so that the display device is detachably mounted on the housing; and a controller provided in the housing and connected to the display device to output pre-stored notes of the piano sheet music to the display device in the form of bar notes that are matched one-to-one with the keyboard, wherein the display device displays a plurality of displays. configured and installed in the coupling unit, the control unit is connected to a plurality of the displays by wire or wireless, respectively, and is installed in the coupling unit to distinguish and recognize the positions of the plurality of displays mounted in the coupling unit It is characterized in that it includes a plurality of sensing units. According to the present invention, a booklet with printed sheet music is no longer required during piano lessons, and without general knowledge of sheet music or special guidance from an educator, you can intuitively play the keyboard while enjoying it like a game according to the guide of bar notes output to match the sheet music. It has the effect of providing sufficient motivation as well as enabling autonomous piano learning and rapid skill improvement.

Description

Piano practice device that can be linked with multiple displays {PIANO PRACTICE DEVICE THAT CAN BE LINKED WITH MULTIPLE DISPLAYS}

The present invention relates to a piano practice device that can be interlocked with a plurality of displays, and more particularly, a piano practice device that can enjoy and learn the piano by pressing keys that are one-to-one matched with bar notes output from a detachable display device. It is about.

Due to the development of various music contents and media, the need for music education in childhood, and the demand for various hobbies or leisure life, the market related to musical instrument performance is increasing year by year compared to the past, along with the demand for musical instruments.

In particular, among the various instruments that can be said to be essential in music education in school, the piano is an instrument that can only be acquired through systematic fingering with both hands or through long-term practice. There was a burden of having to purchase an expensive piano for this.

In addition, in the case of most musical instruments, including the piano, in which lessons are mainly taught through a booklet printed with sheet music, it is difficult to accurately read the sheet music composed of musical notes without general knowledge or help from an educator.

Therefore, faithful piano learning that matches the tempo and rhythm of the score cannot be achieved, and it is difficult to expect autonomous learning and rapid skill improvement due to insufficient motivation for piano learning. has certain limits.

Korean Patent Publication No. 10-2010-0122191 (published on August 19, 2014) among the prior art proposed to solve the above problems related to piano learning is a method for generating music using a mobile terminal equipped with a touch screen. is initiating.

According to this prior art, it is possible to easily acquire basic knowledge of music, such as musical notes, commandments, clefs, etc., without special help from an educator only by driving the application, thereby overcoming the limitations of learning through book music textbooks. there is

However, these prior arts only use a touch screen, which is a display device to perform music composition, arrangement, and accompaniment, and have no connection with the actual piano keyboard, so it is difficult to use them for learning the piano by typing the actual keyboard. there is

Korean Patent Publication No. 10-2010-0122191 (published on August 19, 2014)

An object of the present invention is to break away from piano lessons using a booklet with sheet music printed, enabling faithful and intuitive piano learning that matches the speed or rhythm of the sheet music without general knowledge of sheet music or special guidance from an educator, and enjoy it like a game. It is to provide a piano practice device that can be interlocked with a plurality of displays in which self-learning and rapid skill improvement can be expected due to sufficient motivation due to ongoing piano learning.

The above object is a housing in which a plurality of keyable piano keys are arranged in left and right directions; a coupling part provided at the rear of the housing so that the display device is detachably mounted on the housing; and a control unit provided in the housing and connected to the display device to output notes of a previously stored piano score to the display device in the form of bar notes that are matched one-to-one with the keyboard. achieved by the device.

The display device may be mounted on the coupler adjacent to an end of the keyboard so that the output bar note and the keyboard intuitively match each other.

The coupling part may include a seating groove recessed along the left and right longitudinal directions at the rear of the housing; a rotating body that is inserted into the seating groove and rotates forward and backward to adjust the angle of the display device; and slit grooves formed along the longitudinal direction of the left and right sides of the rotating body so that the display device is inserted and mounted therein.

The coupling part may further include a stopper built into the housing to fix the rotation of the rotating body step by step.

The display device may be composed of a plurality of displays and mounted on the coupler, respectively, and the control unit may be connected to the plurality of displays in a wired or wireless manner.

Another object of the above is a housing in which a plurality of keyable piano keys are arranged in left and right directions; a coupling part provided at the rear of the housing so that the display device is detachably mounted on the housing; and a control unit provided in the housing and connected to the display device to output pre-stored notes of a piano score to the display device in the form of bar notes that are matched one-to-one with the keyboard;

The display device is composed of a plurality of displays and is mounted on the coupler, respectively, and the control unit is connected to the plurality of displays in a wired or wireless manner,

It is achieved by a piano practice device capable of interlocking with a plurality of displays, characterized in that it includes a plurality of sensing units installed in the coupling portion to distinguish and recognize the positions of the plurality of displays mounted on the coupling portion.

The control unit may control the previously stored notes of the piano score to be individually output to each of the plurality of displays in the form of bar notes that are matched one-to-one with the keyboard based on the location information of each of the displays recognized by the sensing unit. .

The control unit controls so that notes of a pre-stored piano sheet music are output from an area exposed above the keyboard among the screen units in the form of bar notes that are matched one-to-one with the keyboard based on the length of the edge portion for each display detected by the sensing unit. can

According to the present invention, a coupling portion for detachably mounting a display device at the rear of a housing in which a plurality of keyable piano keys are arranged left and right, and a display device in the form of bar notes that match notes of a previously stored piano score to the keyboard one-to-one. A control unit connected to the display device is provided, the display device is composed of a plurality of displays and is mounted on each coupling unit, and the control unit is connected to the plurality of displays by wire or wireless, so that sheet music is no longer printed during piano lessons. Booklets are not required, and without general knowledge of sheet music or special guidance from an educator, it is possible to learn the piano intuitively while playing a game according to the guide of bar notes printed to match the sheet music, providing sufficient motivation as well as autonomous learning. It has the effect of enabling in-piano learning and rapid improvement of skills.

1 is a perspective view of a display device-linked piano practice device according to an embodiment of the present invention.
FIG. 2 is an exploded view in which main components of FIG. 1 are disassembled.
FIG. 3 is a diagram illustrating bar notes output to a display device and notes on a score that are auxiliaryly output so as to be matched one-to-one with a keyboard.
FIG. 4 is a cross-sectional view taken along the line A-A' in FIG. 1 .
5 is a use state diagram showing the operation of the coupling unit according to the present invention in detail.
6 is a perspective view of a piano practice device capable of interlocking with a plurality of displays according to a modified example of the present invention.
7 is a use state diagram showing the operation of the sensing unit according to the present invention in detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to clarify the gist of the present invention.

1 is a perspective view of a display device-linked piano practice device according to an embodiment of the present invention, FIG. 2 is an exploded view in which the main components of FIG. 1 are disassembled, and FIG. 4 is a cross-sectional view taken along the cutting line A-A' in FIG. 1, and FIG. 5 is a use state diagram showing the operation of the coupling unit according to the present invention in detail, FIG. 6 is a perspective view of a piano practice device capable of interlocking with a plurality of displays according to a modification of the present invention, and FIG. 7 is a use state diagram showing the operation of the sensing unit according to the present invention in detail.

Up (top), bottom (down), left and right (side or side), front (front, keyboard side), back (pear, display device side), etc., which refer to directions in the description and claims of the invention, etc. It is determined based on the relative position between the drawings and configurations for convenience of explanation rather than purpose, and the three axes can be rotated and changed to correspond to each other, and this is followed unless specifically limited otherwise.

The display device-linked piano practice device 100 according to the present invention enables intuitive piano learning that faithfully conforms to the score while enjoying it like a game without general knowledge of sheet music or special guidance from an educator, and autonomous learning through sufficient motivation. It is an invention devised to enable piano learning and rapid skill improvement.

In order to specifically implement the functions or actions as described above, the display device-linked piano practice device 100 according to the present invention, as shown in FIGS. 1 to 5, includes a single display device 200, a housing 110, a coupling unit 120, a display device including a plurality of displays 210a, 210b, and 210c as shown in an embodiment including an embodiment including a control unit 130 and a sensing unit 140, and the like ( 200) may be configured as a modified example in which it is optionally attached or detached.

Hereinafter, each configuration described above will be described in detail.

First, the display device 200 is a device that visually displays various image data so as to be recognizable through human eyes. 20) as an image, it is not particularly limited.

However, the display device 200 according to the embodiment of the present invention, as shown in FIGS. It may be a commercialized liquid crystal display device that can be manufactured in a thin and flat plate form as shown in FIG.

At this time, the display device 200 composed of a single liquid crystal display has a length corresponding to the arranged keys 112 so as to simultaneously display all bar notes 20 corresponding to the plurality of arranged keys 112. can be made with

On the other hand, such a display device 200, even if there is no liquid crystal display device having a length corresponding to the plurality of keyboards 112 as in the above-described embodiment, like the modified example shown in FIG. It may be configured as a display (210a, 210b, 210c) of.

At this time, the plurality of displays 210a, 210b, and 210c are plate-shaped smart phones, tablet PCs, electronic book terminals, PDA (Personal Digital Assistants), and PMP (Portable Multimedia) that can output image data. Player), navigation, and the like, but are not limited thereto.

The display device 200 according to the embodiments and modifications of the present invention is connected to the control unit 130 to be described later in a wired or wireless manner, and the bar note 20, which is continuous image information, according to the operation control of the control unit 130 ) can be visually output or visually output together with the musical score composed of the conventional notes 10.

Here, the bar note 20 referred to throughout the description of the present invention, as shown in FIG. 3, means that the note 10 on the score constituting the music is visualized in the form of a bar in a one-to-one correspondence with the keyboard 112.

Specifically, the bar note 20 is intuitively displayed vertically above the keyboard 112 corresponding to the height of the note (do, re, mi, pa, etc.), and is expressed vertically and long in proportion to the length of the note, It is configured to move from the top of the keyboard 112 to the bottom according to the playing speed of the song.

Due to the plurality of bar notes 20 moving downward in this way, the user can play the song by pressing the keys 112 in sequence in response to the bar notes 20 falling on the keyboard 112. According to this, it is possible to enjoy and perform piano learning that is intuitive and faithfully conforms to the music score, like a game, without general knowledge of the score or special guidance from an educator.

The housing 110 is a component provided to arrange and install a plurality of keyable piano keys 112 left and right, and has a shape similar to that of a digital piano as a whole, and includes a coupling unit 120 and a control unit 130 to be described later. A space in which a lamp is installed may be formed inside.

At this time, the keyboard 112 is composed of 80 to 90 keys 112 corresponding to approximately 7 musical scales and is arranged in front of the housing 110, and each key 112 is the key of the corresponding keyboard 112. It may include an input terminal 112a for recognizing and a weight member (not shown) for forming a touch feeling of the keyboard 112.

In this housing 110, function buttons for various operations of the piano practice device 100 according to the present invention, a power supply unit (not shown) that provides power, and keystrokes of the keyboard 112, similar to the structure installed in a digital piano, A speaker (not shown) outputting a sound according to the speaker (not shown) and a pedestal 114 supporting a lower portion of the housing 110 may be provided.

The coupler 120 is a component provided at the rear of the housing 110 so that the above-described display device 200 can be detachably mounted on the housing 110, and one end of the display device 200 is fitted into the housing 110. If it is a groove-shaped structure that can be mounted on (110) and can be easily detached from the housing (110), it is not particularly limited.

However, the coupler 120 according to the exemplary embodiment and modified example of the present invention mounts the display device 200 so as to be adjacent to the end of the keyboard 112, while varying the inclination of the mounted display device 200. It may be installed in the housing 110 as a structure.

Here, the structure of the coupling part 120 holding the display device 200 adjacent to the end of the keyboard 112 is such that the bar note 20 output from the display device 200 and the keyboard 112 intuitively match each other. is to make it happen.

Due to the adjacent structure of the coupling part 120, mistakes that occur when the display device 200 outputting the bar note 20 is placed at a distance from the end of the keyboard 112, that is, the user Mistakes of pressing not the key 112 corresponding to the note 20 but another adjacent key 112 can be effectively reduced.

In addition, the structure of the coupler 120 for varying the inclination of the mounted display device 200 is provided to secure a user's comfortable viewing angle for the bar note 20 output from the display device 200, as shown in FIG. 4 and As shown in FIG. 5, it may include a seating groove 122, a rotating body 124, a slit groove 126, and a stopper 128.

Here, the seating groove 122 is a component that supports the rotating body 124 to be described later and is inserted so that the rotating body 124 rotates. It may be made concavely depressed in the form.

The rotating body 124 is a component that is inserted into the above-described seating groove 122 to adjust the angle of the display device 200 and rotates back and forth, and is a complementary cylindrical shape that fits snugly into the recessed seating groove 122. It may be made in a rod shape.

An adjustment knob 124a may be coupled to one end of the rotating body 124 so that the user can manipulate the rotating body 124 from the outside of the housing 110 .

The slit groove 126 is a component provided to allow the thin plate-shaped display device 200 to be inserted and mounted, and is formed along the left and right longitudinal directions of the rotating body 124 with a width corresponding to the lower end of the display device 200. It can be.

At this time, the width of the slit groove 126 may be formed to be approximately 10 mm to 15 mm larger than the thickness of the general display device 200 made of a plate shape.

Further, the vertical depth of the slit groove 126 is the rim portion 214 (bezel) that surrounds and supports the screen portion 212 that outputs an image on the display device 200 (displays 210a, 210b, and 210c). and is formed to a depth capable of holding and mounting the display device 200 at a constant angle.

At least one stopper 128 is installed in the housing 110 along the longitudinal direction of the rotating body 124 to change the mounting angle of the display device 200 by fixing the rotation of the rotating body 124 step by step. is a component

The stopper 128 according to the embodiment and modification of the present invention is a leaf spring 128a provided between the rotating body 124 and the seating groove 122, as shown in FIGS. 2, 4 and 5 ) and a fixing protrusion 128b.

Here, the plate spring 128a is a component that is formed of a plate-shaped spring with a convexly protruding central portion and is embedded in one side of the above-described seating groove 122 .

Here, the convexly protruding part of the leaf spring 128a is elastically deformed according to the relative rotation of the fixing protrusion 128b, which is a concave-convex structure to be described later, and is elastically restored to firmly fix and support the rotating body 124.

The fixing protrusion 128b is a component that is formed along the circumference of the rotating body 124 in a concave-convex shape of valleys and hills in some sections and rotates along with the rotation of the rotating body 124.

As described above, the fixing protrusion 128b interacts with the protruding part of the leaf spring 128a buried on one side of the seating groove 122 and rotates the rotating body 124 relatively, as shown in FIG. , it is fixed and supported in multiple stages.

The sensing unit 140 detects whether or not the display device 200 is mounted on the coupling unit 120 and, when the display device 200 is composed of a plurality of displays 210a, 210b, and 210c, respectively, distinguishes the position thereof. As a component installed in the coupler 120 for recognition, it can be operated and controlled by being electrically connected to the control unit 130 to be described later.

The sensing unit 140 according to embodiments and modifications of the present invention may be composed of a plurality of commercially available sensors using reflection of sound waves or light waves such as ultrasonic waves, infrared rays, or lasers to implement the above-described sensing function. have.

The sensing unit 140 composed of the commercially available sensor as described above is, in detail, the display device 200 ( It may be embedded in one surface of the slit groove 126 so as to direct the screen portion 212 of the displays 210a, 210b, and 210c.

At this time, the plurality of sensing units 140 embedded in one surface of the slit groove 126 emits laser beams, etc., which are reflected and received by a front object (the display device 200 or the other surface of the slit groove 126). Whether or not the display device 200 is installed can be determined by measuring a distance (time function) from the information and transmitting the corresponding measurement information to the control unit 130 .

In addition, when the display device 200 is composed of a plurality of displays 210a, 210b, and 210c arranged in parallel as shown in FIG. The number of displays 210a, 210b, and 210c and the number of displays 210a, 210b, and 210c based on the characteristic reflectance of a laser or the like for the edge portion 214 (or screen portion 212) positioned overlapping between The size (horizontal length of the mounted state) of each screen unit 212 is detected or recognized, and the corresponding measurement information is transmitted to the control unit 130 .

At this time, the screen portion 212 for each display 210a, 210b, and 210c and the edge portion 214 disposed along the periphery are clearly distinguished from the difference or change in the reflectance of the laser or the like received by the sensing unit 140 in detail. It can be.

Here, the difference or change in the reflectance of the laser or the like is a difference in materials used in the production of the screen portion 212 and the frame portion 214, a difference in transparency of the material, a coupling step between the screen portion 212 and the frame portion 214, etc. It is characteristically caused by

For this reason, the control unit 130 determines the number of displays 210a, 210b, and 210c, the number of displays 210a, 210b based on the information about the difference or change in the reflectance of the laser light measured and transmitted by the plurality of sensing units 140. , 210c), the location information for each display 210a, 210b, 210c composed of the size of the screen portion 212 and the lengths (Ta to Tc) of the frame portion can be calculated in detail.

The control unit 130 is connected to the above-described display device 200 by wire or wirelessly, and is electrically connected to the above-described keyboard 112, speaker, sensing unit 140, etc. inside the housing 110 to perform each operation. It is a component that controls, transmits, receives, and processes necessary information.

The control unit 130 is an information processing device capable of information operation and sequence control through programming, such as a micro controller unit (MCU), a microcomputer, an Arduino, or a programmable logic controller (PLC), and a piano sheet music. It may include a storage device for storing data about the display device, a wired/wireless module for communication with the display device 200, and the like.

In relation to the present invention, the control unit 130 having the above-described configuration basically converts the notes 10 of the piano score pre-stored in the storage device into bar notes 20 that are matched one-to-one with the keyboard 112, , a series of control operations for outputting the converted bar note 20 to the display device 200 are performed.

At this time, the control unit 130 may visually output the score composed of the bar note 20 and the note 10 through the display device 200 as shown in FIG. 3 .

Further, the control unit 130 determines that when the user keys the keyboard 112 sequentially according to the bar notes 20 falling on the keyboard 112 from the display device 200 to play the piano, the input end 112a is pressed. Based on this, a series of control operations are performed to continuously output corresponding sounds through the speaker, determine the accuracy of keystrokes, and visually output them through the display device 200 .

And, as shown in FIGS. 1 and 2 , when the display device 200 is composed of a single liquid crystal display device, the control unit 130 controls the operation of the sensing unit 140 to provide the coupling unit 120 with the display device. It is possible to perform a control operation of checking whether or not the 200 is mounted and displaying an alarm informing of this when it is not mounted.

On the other hand, the controller 130, when using the display device 200 composed of a plurality of displays 210a, 210b, 210c as shown in FIG. 6, each display (210a, 210b, 210c) and a wired or During a wireless connection, various information about the size and resolution of the screen unit 212 for each display is received, and the positions of the displays 210a, 210b, and 210c are classified and determined through the above-described sensing unit 140. control operation is performed.

Further, the control unit 130 determines that the previously stored notes 10 of the piano score are matched one-to-one with the keyboard 112 based on the location information of the displays 210a, 210b, and 210c recognized by the sensing unit 140. In the form of (20), it is controlled to be individually output to each of the plurality of displays 210a, 210b, and 210c.

As a result, even if there is no liquid crystal display device manufactured with a length corresponding to the plurality of keyboards 112 as shown in FIGS. , Piano learning using smart phones, tablet PCs, e-book terminals, etc. can be done easily.

However, when the display device 200 is configured with a plurality of various displays 210a, 210b, and 210c provided by the user as described above, the display ( 210a, 210b, and 210c), a problem may occur in that the bar notes 20 output for each of the keys 112 do not coincide with the horizontal arrangement of the keyboard 112.

In order to solve this problem, the control unit 130, as described above, displays (210a, 210b, 210c) based on the information about the difference or change in the reflectance of the laser, etc. measured and transmitted by the plurality of sensing units 140. ), the size of the screen unit 212 for each display 210a, 210b, and 210c (horizontal length in a mounted state), and information about the lengths (Ta to Tc) of the frame for each display 210a, 210b, and 210c are calculated. will do

And, as shown in FIG. 7 , the controller 130 determines the angle (based on a vertical line) of the mounted displays 210a, 210b, and 210c and the hidden depth (HD) of the displays 210a, 210b, and 210c determined by the mounting angle. ) (the length from the top surface of the keyboard 112 to the bottom of the slit groove 126) and the lengths (Ta to Tc) of the rims of each display 210a, 210b, and 210c calculated above, the previously stored piano sheet music The notes 10 of are controlled to be output from the area exposed above the keyboard 112 among the screen parts 212 for each display 210a, 210b, and 210c in the form of a bar note 20 that is matched one-to-one with the keyboard 112. .

Specifically, in the case of the left display 210a shown in (a) of FIGS. 6 and 7 , the controller 130 determines the length of the edge portion calculated from the hidden depth HD of the display 210a determined for each mounting angle. (Ta) is subtracted to calculate the length of the screen portion 212 where the output of the bar note 20 is limited.

Of course, the length of the screen unit 212 whose output is limited can be more accurately calculated through a trigonometric function considering the angles (based on a vertical line) of the mounted displays 210a, 210b, and 210c.

In addition, the control unit 130 calculates the size of the left displays 210a, 210b, and 210c transmitted during a wired or wireless connection, the tilt information of the displays 210a, 210b, and 210c themselves (confirming whether they are mounted in the vertical/horizontal direction) and the above Based on the information on the length of the screen portion 212 whose output is limited, bar notes 20 are output from the area exposed above the keyboard 112 among the screen portions 212 of the left displays 210a, 210b, and 210c. You will be able to control it.

In addition, in the case of the right display 210c shown in (b) of FIGS. 6 and 7, the controller 130 calculates the length of the edge ( Tc) is subtracted to calculate the length of the screen portion 212 where the output of the bar note 20 is limited.

In addition, the control unit 130 calculates the size of the left displays 210a, 210b, and 210c transmitted during a wired or wireless connection, the tilt information of the displays 210a, 210b, and 210c themselves (confirming whether they are mounted in the vertical/horizontal direction) and the above Based on the information about the length of the screen portion 212 whose output is limited, bar notes 20 are output from the area exposed above the keyboard 112 among the screen portions 212 of the right displays 210a, 210b, and 210c. You will be able to control it.

As described above, according to the embodiments and modifications of the present invention, a booklet printed with sheet music is no longer required during piano lessons, and a bar output to match the sheet music without general knowledge of sheet music or special guidance from an educator According to the guide of the notes 20, it is possible to learn the piano by intuitively playing the keyboard 112 while enjoying it like a game, so that sufficient motivation, as well as autonomous piano learning and rapid skill improvement can be expected, and a mounted display device ( 200) and user convenience can be improved through utilization of various displays 210a, 210b, and 210c possessed by the user.

In the foregoing, although specific embodiments of the present invention have been described and shown, the present invention is not limited to the described embodiments, and it is common knowledge in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Therefore, such modifications or variations should not be individually understood from the technical spirit or viewpoint of the present invention, and modified embodiments should fall within the scope of the claims of the present invention.

10: note 20: bar note
100: display device linked piano practice device
110: housing 112: keyboard
112a: input terminal 114: pedestal
120: coupling part 122: seating groove
124: rotating body 124a: control knob
126: slit groove 128: stopper
128a: plate spring 128b: fixed protrusion
130: control unit 140: sensing unit
200: display device 210a, 210b, 210c: display
212: screen portion 214: frame portion
Ta,Tc: Thickness of the frame HD: Hidden depth of display

Claims (3)

A housing in which a plurality of keyable piano keys are arranged left and right; a coupling part provided at the rear of the housing so that the display device is detachably mounted on the housing; and a control unit provided in the housing and connected to the display device to output pre-stored notes of a piano score to the display device in the form of bar notes that are matched one-to-one with the keyboard;
The display device,
Consisting of a plurality of displays, each mounted on the coupling part,
The control unit,
Connected to a plurality of the displays by wire or wirelessly, respectively,
A piano practice device capable of interlocking with a plurality of displays, characterized in that it comprises a plurality of sensing units installed in the coupling portion to distinguish and recognize the positions of the plurality of displays mounted on the coupling portion. According to claim 1,
The control unit,
Based on the location information of each of the displays recognized by the sensing unit, the notes of the previously stored piano score are individually output to each of the plurality of displays in the form of bar notes that are one-to-one matched to the keyboard. A piano practice device that can be interlocked with the display. According to claim 1,
The control unit,
Based on the length of the edge portion for each display detected by the sensing unit, the notes of the previously stored piano score are output from an area exposed above the keyboard among the screen portions in the form of a bar note that is one-to-one matched to the keyboard. Characterized in that A piano practice device that can be interlocked with multiple displays.

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