KR20220129497A - Piano practice device that can be linked with multiple displays - Google Patents

Abstract

Disclosed is a piano practice device capable of being linked with a plurality of displays. The piano practice device capable of being linked with a plurality of displays according to the present invention comprises: a housing having a plurality of piano keys capable of being keyed installed and arranged in left and right directions; a coupling portion provided at the rear of the housing so that a display device is detachably mounted on the housing; and a control portion provided in the housing and connected to the display device to output pre-stored notes of a piano sheet music to the display device in a form of bar notes matched one-to-one with the keys. The display device includes a plurality of displays, each of which is each mounted on the coupling portion, and the control portion is connected to each of the plurality of displays by wire or wireless. In addition, a plurality of sensing portions installed in the coupling portion are included to distinguish and recognize each position of the plurality of displays mounted on the coupling portion. According to the present invention, a booklet with printed sheet music is no longer required for piano lessons. Moreover, according to a guide of bar notes output to match the sheet music without any knowledge of the sheet music or special guidance from an educator, it is possible to learn the piano by intuitively playing the key while enjoying the same like a game. Therefore, motivation is sufficiently achieved and piano learning is performed autonomously, and skills are rapidly improved.

Description

A 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 capable of interlocking with a plurality of displays, and more particularly, a piano practice device capable of learning and enjoying the piano by pressing a key that matches one-to-one with bar notes output from a detachable display device. is about

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

In particular, among various musical instruments that can be said to be essential in music education during school days, the piano is an instrument that can only be acquired through systematic fingering training or long-term practice. There was a feeling of pressure to purchase an expensive piano for that purpose.

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

Therefore, faithful piano learning that matches the speed or rhythm of the score is not achieved, and the motivation for learning the piano is insufficient, so autonomous learning and rapid skill improvement are difficult to expect. has certain limitations.

Among the prior art presented to solve the problems related to learning piano as described above, Korean Patent Laid-Open No. 10-2010-0122191 (published date: August 19, 2014) relates to a method for generating music using a portable terminal equipped with a touch screen. is disclosed about.

According to this prior art, the basic knowledge of music, such as notes, commandments, and clefs, can be easily acquired without special help from the educator only by driving the application, so it is possible to overcome the limitations of learning through booklet music textbooks. There is this.

However, this prior art only uses a touch screen as a display device to compose, arrange, and accompany music, and has no connection with the actual piano keyboard, so it is difficult to use it for learning the piano while playing the actual keyboard. there is

Republic of Korea Patent Publication No. 10-2010-0122191 (published date: August 19, 2014)

An object of the present invention is to break away from piano lessons using a booklet printed with sheet music, and to learn the piano faithfully and intuitively according to the speed and rhythm of sheet music without any 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 linked with a plurality of displays that can be sufficiently motivated due to the ongoing piano learning and can be expected to learn autonomously and rapidly improve skills.

The above object is to provide 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 the pre-stored notes of the piano sheet music to the display device in the form of bar notes matched one-to-one with the keyboard. achieved by the device.

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

The coupling portion may include a seating groove recessed along the left and right longitudinal directions at the rear of the housing; a rotating body inserted into the seating groove to rotate back and forth to adjust the angle of the display device; and a slit groove formed along a left and right longitudinal direction of the rotating body so that the display device is fitted thereinto.

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

The display device may include a plurality of displays and mounted on the coupling unit, respectively, and the control unit may be connected to the plurality of displays by wire or wireless, respectively.

Another object is to provide 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 the pre-stored notes of the piano sheet music to the display device in the form of bar notes matched one-to-one with the keyboard,

The display device is composed of a plurality of displays and is mounted on the coupling unit, respectively, and the control unit is connected to the plurality of displays by wire and wireless, respectively,

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 unit to distinguish and recognize the positions of the plurality of displays mounted on the coupling unit, respectively.

The control unit, based on the location information of each of the displays recognized by the sensing unit, the pre-stored notes of the piano sheet music can be controlled to be individually output to each of the plurality of displays in the form of bar notes matched one-to-one with the keyboard. .

The control unit, on the basis of the length of the edge portion for each display detected by the sensing unit, the pre-stored notes of the piano sheet music in the form of bar notes that match the keyboard one-to-one control to be output from the area exposed above the keyboard of the screen unit can

According to the present invention, a combination part 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 bar-note display device in which notes of a previously stored piano sheet are matched to the keyboard one-to-one A control unit connected to a display device is provided to output to the display device, and the display device is composed of a plurality of displays and mounted on a coupling unit, respectively. There is no booklet required, and without any knowledge about the sheet music or special guidance from the educator, it is possible to enjoy the piano like a game and intuitively learn to play the keyboard according to the guide of the bar notes that match the sheet music. It has the effect of enabling in-piano learning and rapid skill improvement.

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 of the main configuration of FIG. 1 .
3 is a diagram illustrating a bar note output to a display device and a score-compensated note output as an auxiliary so as to match the keyboard one-to-one.
4 is a cross-sectional view taken along line A-A' of FIG. 1 .
5 is a 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 specifically showing the operation of the sensing unit according to the present invention.

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 in order 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 of the main configuration of FIG. 1, and FIG. 3 is a bar note output to the display device to match the keyboard one-to-one. It is a view showing a musical score-compensated note output as an auxiliary, and FIG. 4 is a cross-sectional view taken along the cutting line A-A' of FIG. 1, and FIG. 6 is a perspective view of a piano practice apparatus interlocking with a plurality of displays according to a modified example of the present invention, and FIG. 7 is a usage state diagram specifically showing the operation of the sensing unit according to the present invention.

Top (top), bottom (bottom), left and right (side or side), front (front, keyboard side), rear (fold, display device side), etc., which refer to directions in the description and claims of the invention, are of limitation of rights. It is determined based on the relative position between the drawings and the configuration for convenience of explanation, not for use, and the three axes may be rotated to correspond to each other and changed, and will follow unless otherwise specifically limited.

The display device-linked piano practice device 100 according to the present invention enables the piano learning that is intuitive and faithful to the score while enjoying it like a game without any knowledge about the score or special guidance from the educator, and autonomously through sufficient motivation. It is an invention devised for learning the piano and improving skills quickly.

In order to implement the above-described functions or actions in detail, the display device-linked piano practice device 100 according to the present invention is, as shown in FIGS. 1 to 5, a single display device 200, a housing (110), the coupling unit 120, the control unit 130 and the embodiment including the sensing unit 140, etc., as shown in FIG. 6, a display device composed of a plurality of displays (210a, 210b, 210c) ( 200) may be configured as a modified example in which attachment and detachment are arbitrarily.

Hereinafter, each of the above-described configurations will be described in detail.

First, the display device 200 is a device that visually displays various image data so that it can be recognized through the human eye, and as will be described later, a bar note ( 20) is not particularly limited as long as it is a commercially available device capable of outputting an image.

However, the display device 200 according to an embodiment of the present invention is shown in Figs. As described above, it may be a commercially available liquid crystal display device that can be manufactured in the form of a thin and flat plate.

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

On the other hand, even if there is no liquid crystal display device having a length corresponding to the plurality of keys 112 as in the above-described embodiment, the display device 200, as in the modified example shown in FIG. of the displays 210a, 210b, and 210c.

At this time, the plurality of displays (210a, 210b, 210c), a smart phone (smart phone), tablet PC, e-book terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia) made of a plate shape capable of outputting image data Player), navigation, etc., but is not limited thereto.

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

Here, the bar notes 20 referred to throughout the description of the present invention refer to those visualized in the form of bars by matching the notes 10 on the sheet music composing the music one-to-one with the keyboard 112 as shown in FIG. 3 .

Specifically, the bar note 20 is intuitively displayed vertically above the keyboard 112 corresponding to the height of the note (do, re, mi, par, etc.), and is expressed vertically in proportion to the length of the note, It is configured to move from the upper side to the lower side of the keyboard 112 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 a song in such a way that the user hits the keyboard 112 in order in response to the bar notes 20 falling on the keyboard 112. Accordingly, it is possible to enjoy and perform piano learning that is intuitive and faithfully matches the score, like a game, without any knowledge about the score or special guidance from the educator.

The housing 110 is a component provided so that a plurality of keyboard keys 112 that can be keyed are arranged and installed left and right, and has a shape similar to that of a digital piano as a whole, and a coupling unit 120 and a control unit 130 to be described later. A space in which the back is installed may be formed therein.

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

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

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

However, the coupling unit 120 according to the embodiment and modification of the present invention is configured to mount the display device 200 so as to be adjacent to the end of the keyboard 112 and change the inclination of the mounted display device 200 . The structure may be installed in the housing 110 .

Here, in the structure of the coupling unit 120 that mounts the display device 200 so as to be adjacent to the end of the keyboard 112 , 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 unit 120 , a mistake that occurs when the display device 200 for outputting the bar note 20 is mounted at a location at a distance from the end of the keyboard 112 , that is, when the user The mistake of not hitting the key 112 corresponding to the note 20 but another adjacent key 112 can be effectively reduced.

In addition, the structure of the coupling unit 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 Figs. 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 fitted so that the rotating body 124 rotates, and a part of the body constituting the rear of the housing 110 is cylindrical along the left and right longitudinal direction. It may be formed by being concavely recessed into the shape.

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

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

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

In this case, the width of the slit groove 126 may be approximately 10 mm to 15 mm greater than the thickness of the general display device 200 having a plate shape.

And the vertical depth of the slit groove 126 is the edge portion 214 (bezel) that surrounds and supports the screen portion 212 that outputs an image in the display device 200 (displays 210a, 210b, 210c). It accommodates and forms the display device 200 to a depth that can be maintained and mounted at a constant angle.

The stopper 128 is built into at least one housing 110 along the longitudinal direction of the rotating body 124 in order 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, specifically, a plate 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 and the like.

Here, the plate spring 128a is a component that is made 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 portion of the leaf spring 128a is elastically deformed according to the relative rotation of the fixing protrusion 128b, which is an uneven structure, which will be described later, and is elastically restored, thereby firmly fixing and supporting the rotating body 124 .

The fixing protrusion 128b is a component that is formed in the form of concavities and convexities of valleys and mountains in some sections along the circumference of the rotating body 124 and rotates together according to the rotation of the rotating body 124 .

As shown in FIG. 5 , the fixing protrusion 128b interacts with the protruding portion of the plate spring 128a embedded on one side of the seating groove 122 as described above and rotates the rotating body 124 relatively as shown in FIG. 5 . , is fixed and supported in multiple stages.

The sensing unit 140 is configured to detect whether the display device 200 is mounted on the coupling unit 120 and whether the display device 200 is configured with a plurality of displays 210a, 210b, and 210c, respectively, by distinguishing the positions thereof. As a component installed in the coupling unit 120 for recognition, it may be electrically connected to the control unit 130 to be described later and controlled in operation.

The sensing unit 140 according to the 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, specifically, the display device 200 ( It may be embedded in one surface of the slit groove 126 to face 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 are reflected by a front object (the other surface of the display device 200 or the slit groove 126 ) after emitting a laser, etc. and receive the laser beam. Whether the display device 200 is mounted may be determined by measuring a distance from the information (a function of time) and transmitting the measurement information to the controller 130 .

In addition, when the plurality of sensing units 140 are configured with a plurality of displays 210a, 210b, and 210c arranged in parallel as shown in FIG. 6 , the display device 200 includes different displays 210a, 210b, and 210c. The number of displays 210a, 210b, and 210c and the number of displays 210a, 210b, and 210c based on the characteristic reflectivity of a laser, etc. for the edge portion 214 (or the screen portion 212) overlapping between the The size of the star screen unit 212 (horizontal length in a mounted state) is sensed or recognized, and the corresponding measurement information is transmitted to the control unit 130 .

In this case, the screen unit 212 for each display 210a , 210b , and 210c and the edge unit 214 disposed along the periphery are specifically distinguished from the difference or change in reflectance of the laser, etc. received by the sensing unit 140 . can be

Here, the difference or change in the reflectivity of the laser, etc., is the difference in the material used for manufacturing the screen unit 212 and the edge part 214 , the transparency difference of the material, the coupling step between the screen part 212 and the edge part 214 , etc. It is characteristically induced by

For this reason, the controller 130, the number of displays 210a, 210b, and 210c, the number of displays 210a, 210b based on the information on the reflectance difference or change of the laser, etc. measured and transmitted from the plurality of sensing units 140, , 210c), it is possible to specifically calculate the location information for each display 210a, 210b, 210c composed of the size of the screen unit 212 and the length of the edge (Ta to Tc).

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 , and the like within the housing 110 to perform respective operations. It is a component that controls, transmits and receives necessary information, and processes it.

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 data, a wired/wireless module for communication with the display device 200 , and the like.

The control unit 130 having the above-described components, in relation to the present invention, basically converts the notes 10 of the piano sheet music stored in the storage device into the form of bar notes 20 matched one-to-one with the keyboard 112 and , a series of control operations for outputting the converted bar note 20 to the display device 200 are performed.

In this case, the controller 130 may also visually output the sheet music composed of the bar note 20 and the note 10 through the display device 200 as shown in FIG. 3 .

And, when the user strikes the keyboard 112 in order according to the bar note 20 falling onto the keyboard 112 from the display device 200 for playing the piano, the input terminal 112a is pressed. A series of control operations of continuously outputting the corresponding sound based on the speaker, determining the accuracy of the keystroke, etc., and visually outputting the sound through the display device 200 are performed.

And, as shown in FIGS. 1 and 2 , when the display device 200 is a single liquid crystal display device, the controller 130 operates and controls the sensing unit 140 to display the display device on the coupling unit 120 . It is possible to check whether the 200 is mounted, and perform a control operation of displaying an alarm indicating this when not mounted.

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

And the control unit 130, based on the position information of each of the displays (210a, 210b, 210c) recognized by the sensing unit 140, the pre-stored notes 10 of the piano sheet music to the keyboard 112 one-to-one matching bar notes (20) is controlled to be individually output to each of the plurality of displays (210a, 210b, 210c).

For this reason, as shown in FIGS. 1 and 2 , even if there is no liquid crystal display device manufactured with a length corresponding to the plurality of keys 112 , a plurality of displays 210a , 210b , and 210c provided by the user, that is, , piano learning using smartphones, tablet PCs, e-book terminals, etc. can be easily accomplished.

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

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

And, the controller 130, as shown in FIG. 7, the angles (based on the vertical line) of the mounted displays 210a, 210b, and 210c, the hidden depth (HD) of the displays 210a, 210b, and 210c determined for each 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 edges of the displays 210a, 210b, and 210c calculated above, pre-stored piano sheet music In the form of a bar note 20 matching one-to-one to the keyboard 112, the note 10 of .

Specifically, in the case of the left display 210a shown in FIGS. 6 and 7 ( a ), the control unit 130 , the length of the edge calculated from the hidden depth HD of the display 210a determined for each mounting angle. By subtracting (Ta), the length of the screen unit 212 in which the output of the bar note 20 is limited is calculated.

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

And the control unit 130, the size of the left display (210a, 210b, 210c) received during wired or wireless connection, the tilt information of the display (210a, 210b, 210c) itself (check whether the vertical/horizontal orientation is mounted) and calculated from above Based on the information about the length of the screen unit 212 whose output is limited, the bar note 20 is output from the area exposed above the keyboard 112 among the screen units 212 of the left displays 210a, 210b, and 210c. to be controlled as much as possible.

In addition, in the case of the right display 210c shown in FIGS. 6 and 7 ( b ), the controller 130 , the length of the edge calculated from the hidden depth (HD) of the display 210c determined for each mounting angle ( Tc) is subtracted to calculate the length of the screen unit 212 in which the output of the bar note 20 is limited.

And the control unit 130, the size of the left display (210a, 210b, 210c) received during wired or wireless connection, the tilt information of the display (210a, 210b, 210c) itself (check whether the vertical/horizontal orientation is mounted) and calculated from above Based on the information on the length of the screen unit 212 whose output is limited, the bar note 20 is output from the area exposed above the keyboard 112 among the screen units 212 of the right displays 210a, 210b, and 210c. to be controlled as much as possible.

As described above, according to the embodiments and modifications of the present invention, a booklet printed with sheet music is no longer required for piano teaching, and a bar that is output to match sheet music without general knowledge about sheet music or special guidance from an educator According to the guide of the note 20, it is possible to learn the piano by intuitively hitting the keyboard 112 while enjoying it like a game, so that not only sufficient motivation, but also autonomous piano learning and rapid skill improvement can be expected, and the display device ( 200), user convenience can be improved through the use of various displays 210a, 210b, and 210c possessed by the user.

In the foregoing, specific embodiments of the present invention have been described and illustrated, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and 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 Accordingly, such modifications or variations should not be individually understood from the spirit or point of view of the present invention, and the modified embodiments should belong to the claims of the present invention.

10: note 20: bar note
100: display device interlocking piano practice device
110: housing 112: keyboard
112a: input 114: pedestal
120: coupling part 122: seating groove
124: rotating body 124a: adjusting knob
126: slit groove 128: stopper
128a: leaf spring 128b: fixing projection
130: control unit 140: sensing unit
200: display device 210a, 210b, 210c: display
212: screen part 214: border part
Ta,Tc: Thickness of border 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 the pre-stored notes of the piano sheet music to the display device in the form of bar notes matched one-to-one with the keyboard,
The display device is
Consists of a plurality of displays, each mounted on the coupling unit,
The control unit is
It is connected to each of the plurality of displays by wire and wireless,
and a plurality of sensing units installed in the coupling unit to distinguish and recognize positions of the plurality of displays mounted on the coupling unit. The method of claim 1,
The control unit is
Based on the position information of each display recognized by the sensing unit, the notes of the piano sheet music stored in advance are individually output to each of the plurality of displays in the form of bar notes matched one-to-one with the keyboard. A piano practice device that can be linked with a display. The method of claim 1,
The control unit is
Based on the length of the edge portion for each display detected by the sensing unit, the notes of the pre-stored piano sheet music are controlled to be output from the area exposed above the keys of the screen unit in the form of bar notes matching the keys one-to-one, characterized in that A piano practice device that can be linked with multiple displays.

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