KR102226365B1 - Light emitting device with noise reduction function - Google Patents

Abstract

The present invention is a technology for a light emitting device having a function of reducing low frequencies and noise, and reducing low frequencies that adversely affect the body through a lighting device and a display device equipped with noise reduction technology without the need for a separate installation space, It is to provide a device that can reduce noise in places where quietness is required.

Description

Light emitting device with noise reduction function

The present invention relates to lighting and display having a noise reduction function, and more particularly, to a device to which noise reduction technology is applied to the light emitting panel 100 so as to reduce noise in a place equipped with a lighting device and a display device. .

Recently, interfloor noise has emerged as a social problem, and interest in noise reduction technology has increased, and accordingly, technologies for blocking various types of noise are being developed. In addition to the problem of inter-floor noise, high-frequency sound can be easily reduced by sound absorbing materials, but it is known that low-frequency waves generated by household appliances in daily life adversely affect health, and a noise reduction device to solve the problem Skills are being developed.

Conventional noise reduction devices have restrictions on places and environments because a product must be installed on a ceiling or a wall, or a product must be separately provided, and the aesthetic effect of a space is reduced by installing or providing a structure.

Korean Patent Publication No. 2018-0072390 ("Portable and detachable vibration noise reduction device", 2018.06.29) discloses a portable or detachable vibration noise reduction device, but it is composed of a separate device and requires an installation place. The problem has not been improved, and the description of the noise reduction technology is not described, so it is not known about the technology capable of reducing low frequencies.

1. Republic of Korea Patent Publication No. 2018-0072390 ("Portable and detachable vibration noise reduction device", 2018.06.29)

The present invention has been conceived to solve the above problems, and an object of the present invention is to provide a noise reduction device using a light emitting panel, there is no restriction on the installation of the device, and it is easily provided on the display of the electronic product to provide an electronic product. It is to provide a light-emitting device having an aesthetic effect and a noise reduction function that can be provided because it can easily reduce the low frequency generated by itself and can be fluidly transformed in shape.

In the light emitting device having a noise reduction function of the present invention, the light emitting panel for emitting light; A panel driving signal unit generating a signal for changing the shape of the light emitting panel; A panel shape changing unit receiving a signal generated by the panel driving signal unit and changing a shape of the light emitting panel according to the signal; One or more acoustic devices provided on the light emitting panel, including an acoustic receiver for receiving sound and an acoustic transmitter for transmitting sound; Consisting of including a filter for extracting a noise signal from the sound signal received from the sound receiver, is connected to the sound device, generates a signal for reducing noise received by the sound receiver and outputs it to the sound transmitter A sound controller; wherein the panel drive signal unit receives and analyzes the noise signal extracted by the filter of the sound controller, and based on the frequency information of the noise signal analyzed for a predetermined time, the panel advance signal or the panel retreat A signal is generated and transmitted to the panel shape changing unit.

At this time, the sound controller, upon receiving the noise signal extracted by the filter, generates a canceling signal having a wave opposite to that of the noise signal, and receives the canceling signal of the noise reducing unit, and the canceling signal It characterized in that it comprises an output sound transmitted to the sound transmitter.

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In this case, the panel shape changing unit may change the shape of the panel by moving at least one predetermined region of the light emitting panel on the basis of the panel advance signal received from the panel driving signal unit.

In addition, the panel shape changing unit may change the shape of the panel by retreating at least one predetermined region of the light emitting panel based on the panel retraction signal received from the panel driving signal unit.

The noise reduction light emitting device further includes a plurality of sound devices, and a sound change unit configured to generate sound control signals representing surround sound effects by allowing the plurality of sound devices to have different sound characteristics, respectively; Characterized in that.

In this case, the sound changing unit generates a low-frequency output signal for changing the acoustic characteristics of the sound transmitter so that the sound device located in the retracted portion of the light emitting panel transmits a low frequency according to a signal of the panel driving signal unit, and the The sound device located in the advanced portion of the light emitting panel is characterized in that generating a high frequency output signal for changing the sound characteristics of the sound transmitter so that high frequency is transmitted.

In addition, when the light emitting panel is a display panel, the sound controller further includes a sound source generator for generating a sound source signal of sound to be output from the sound transmitter to the outside, and the output sound synthesis unit further receives a sound source signal. And transmitting an output signal generated by synthesizing an offset signal and a sound source signal to the sound transmitter.

In addition, the noise reduction light emitting device further includes an image changing unit, wherein the image changing unit is characterized in that the image information displayed on the light emitting panel is changed according to a signal of the panel driving signal unit.

The acoustic device is characterized in that it comprises an acoustic actuator for generating sound by directly vibrating the light emitting panel.

In addition, the light emitting panel is characterized in that it has any one or more of one or more curves and one or more straight lines.

In addition, the light-emitting panel is characterized in that it has variability in which the shape of the panel is flexible.

In addition, the light-emitting panel is characterized in that a plurality of panel modules are coupled to each other to include the light-emitting panel.

In addition, it is characterized in that it further comprises a partition wall portion formed to surround each of the plurality of areas of the sound device to form an air gap space in the output area of the sound device.

The light emitting device having the noise reduction function of the present invention by the above configuration can be provided with an aesthetic effect as lighting or display in a room where noise reduction is required, such as a library or a gallery, without the need for a separate installation space. It has the effect of automatically controlling low frequencies generated by electronic products by being installed as a display of the product.

1 is a block diagram of an acoustic device of the present invention
Figure 2 is a block diagram of a sound device and sound controller of the present invention
3 is a block diagram of a sound controller including a sound device and a sound source generator of the present invention
4 is a block diagram including a panel drive signal unit and a panel shape change unit of the present invention
Figure 5 is a block diagram further including a sound change unit according to the shape of the panel deformation of the present invention
6 is a block diagram further including an image change unit according to a panel shape modification of the present invention
7 is a block diagram further including a sound change unit, an image change unit, and a sound source generation unit according to a panel shape modification of the present invention

Hereinafter, the technical idea of the present invention will be described in more detail using the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors appropriately explain the concept of terms in order to explain their own invention in the best way. Based on the principle that it can be defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all the technical spirit of the present invention. It should be understood that there may be variations.

Hereinafter, the technical idea of the present invention will be described in more detail using the accompanying drawings. The accompanying drawings are only an example illustrated to describe the technical idea of the present invention in more detail, so the technical idea of the present invention is not limited to the form of the accompanying drawings.

The present invention is a light emitting device 1000 having a noise reduction function, including a light emitting panel 100 for emitting light, an acoustic receiver 210 for receiving sound, and an acoustic transmitter 230 for transmitting sound, the At least one sound device 200 provided in the light emitting panel 100, connected to the sound device 200, generates a signal for reducing noise received by the sound receiver 210, and the sound transmitter 230 It may be configured to include a sound controller 300 outputting to ).

The light-emitting panel 100 may be a panel of a lighting device, and any light emitting panel such as a display panel may be used. In addition, the light emitting panel 100 may be formed in a flat or curved shape, may be formed in a polygon such as a circle, a triangle, a square, etc., may be formed to have at least one of one or more curves and one or more straight lines, and a plurality of panels Modules may be combined with each other to form one light emitting panel 100. The light emitting panel 100 may be made of a property having variability that is flexible and changeable, and may be, for example, a flexible display.

The sound device 200 is configured as an integral type including the sound receiver 210 and the sound transmitter 230 and may be provided in one or more of the light emitting panel 100. The sound receiver 210 is a microphone capable of collecting external noise, the sound transmitter 230 may be a speaker that transmits a sound signal to be output to the outside, and the sound device 200 is the light emitting panel It may be configured to include an acoustic actuator that directly vibrates 100 and generates sound.

Referring to FIG. 1, the sound device 200 further includes an amplifier 250 connected to a microphone and a speaker, an ADC 270 (Analog Digital Converter), and a DAC 290 (Digital Analog Converter). , Which may be separately provided in the sound receiver 210 and the sound transmitter 230, respectively, and for an optimal embodiment, the present invention may be configured as one and connected to the sound device 200.

In one embodiment, in the present invention, the sound signal received by the sound receiver 210 is amplified by the amplifier 250, and the sound signal amplified by the amplifier 250 is transmitted to the ADC 270, The sound signal received as a signal is converted into a digital signal, and the converted digital signal is transmitted to the sound controller 300. In addition, the sound controller 300 transmits the sound to be output through a speaker as a digital signal to the sound device 200, and at this time, the DAC 290 provided in the sound device 200 receives the digital signal. May be converted into an analog signal and transmitted to the amplifier 250 to output an acoustic signal to the outside through a speaker. In this case, the acoustic transmitter 230 and the acoustic receiver 210 It can be that one structure plays the same role. Subsequently, a process of amplifying the sound signal through the amplifier 250 and the ADC 270/DAC 290 or converting it to an analog or digital signal will be omitted and described.

Referring to FIG. 2, the sound controller 300 includes a filter 310 for extracting a noise signal N from the sound signals received from the sound receiver 210, and a noise signal N extracted from the filter 310. ), a noise reduction unit 330 that generates a cancellation signal C having an opposite wave to that of the noise signal N, and receives a cancellation signal C of the noise reduction unit 330 And, it may be configured to include an output sound synthesis unit 350 for transmitting the cancellation signal (C) to the sound transmitter 230.

The filter 310 may be one or more selected from APF (All Pass Filter), HPF (High Pass Filter), LPF (Low Pass Filter), BPF (Band Pass Filter), and the sound controller 300 of the present invention. ) Is formed of an operation processing unit (DSP (Digital Signal Processor)/CPU (Central Processing Unit)), and it is assumed that the type of the filter 310 can be selected and changed by changing the software of the operation processing unit. The sound controller 300 selects the type of the filter according to an effect desired by the user, or changes the noise signal N extracted by the filter according to a preset type of filter.

The noise signal (N) extracted by the filter is transmitted to the noise reduction unit 330, wherein the noise reduction unit 330 receives the noise signal (N) extracted through the filter, and cancels the noise signal (N). In order to do this, a cancellation signal C having a wave opposite to that of the noise signal N is generated.

The noise reduction unit 330 transmits the generated cancellation signal C to the output acoustic synthesis unit 350, and the output acoustic synthesis unit 350 transmits the received cancellation signal C to the acoustic transmitter 230 ) And output to the outside. Accordingly, the canceling signal C having a wave opposite to the wave of the noise signal N extracted from the filter is output to the outside through the sound transmitter 230, so that the noise signal N and the canceling signal are externally outputted. When (C) meets, destructive interference is generated and the effect of noise reduction occurs.

Referring to FIG. 3, when the light emitting panel 100 is a display panel, the sound controller 300 generates a sound source signal A of a sound source to be output to the outside through the sound transmitter 230. It may further include a unit 370. At this time, the output sound synthesis unit 350 further includes and receives a sound source signal (A), and the offset signal (C) received from the noise reduction unit 330 and the sound source received from the sound source generator 370 The signal A is synthesized and transmitted to the acoustic transmitter 230, and a sound source signal A and a cancellation signal C may be output through the acoustic transmitter 230.

Referring to FIG. 4, the light emitting device 1000 receives a panel driving signal unit 110 generating a signal for changing the shape of the light emitting panel 100 and a signal generated by the panel driving signal unit 110. And, it may further include a panel shape changing unit 130 for changing the shape of the light emitting panel 100 according to a signal.

The panel drive signal unit 110 receives the noise signal N extracted by the filter, and based on the frequency information of the noise signal N analyzed for a predetermined time, the panel advance signal F or the panel retreat signal ( B) is generated and transmitted to the panel shape changing unit 130. The panel shape changing unit 130 further includes a driving device capable of changing the shape of the light emitting panel 100, and the panel shape changing unit 130 receiving a signal is the panel driving signal unit 110 The shape of the light emitting panel 100 may be changed by operating the driving device of the light emitting panel 100 according to the signal of.

When a panel advance signal F is received by the panel shape changing unit 130, the panel shape changing unit 130 may change the shape of the panel while at least one predetermined area of the light emitting panel 100 advances. And, when the panel shape change unit 130 receives the panel retreat signal B, the panel shape change unit 130 changes the shape of the panel while at least one predetermined area of the light emitting panel 100 is retracted. You can change it.

For an optimal embodiment, for example, when the panel drive signal unit 110 receives the noise signal N extracted from the filter and analyzes it for a certain period of time, the panel advances when the corresponding noise signal N is recognized. A signal F or a panel retreat signal B may be generated. At this time, when the frequency of the noise signal (N) is less than or equal to a preset value, the panel retreat signal (B) may be generated, and when the frequency of the noise signal (N) exceeds the preset value, the panel advance signal (F) may be generated. have. This is to apply the characteristic that the low frequency can transmit farther than the high frequency, it is possible to more effectively transmit the offset wave through the shape change, and may be included and configured to obtain an aesthetic effect.

Referring to FIG. 5, the light emitting device 1000 is composed of a plurality of the sound devices 200, so that each sound device 200 has different sound characteristics in order to exhibit a surround sound effect. It may further include a sound change unit 400 for generating a signal. The sound change unit 400 may serve as an equalizer, and includes one capable of changing the sound characteristics of each of the sound devices 200 by a user's selection among a plurality of preset modes, or the panel drive It includes being capable of changing the acoustic characteristics of each of the acoustic devices 200 according to the panel advance signal F and the panel retreat signal B of the signal unit 110.

As an embodiment in which a signal of the sound change unit 400 is generated by a signal from the panel driving signal unit 110, a panel retreat signal B is generated from the panel driving signal unit 110 to form the panel shape. When at least one predetermined area of the light emitting panel 100 is retracted by the change unit 130 and the shape is changed, the sound changing unit 400 is the light emitting panel ( The acoustic transmitter 230 provided in 100 may generate a low frequency output signal L for changing the acoustic characteristics of the acoustic device 200 so that the acoustic signal in the low frequency region can be transmitted. In addition, if a panel advance signal F is generated from the panel driving signal unit 110 and at least one predetermined area of the light emitting panel 100 is advanced by the panel shape changing unit 130 and the shape is changed, , The sound changing unit 400 is the sound device 200 so that the sound transmitter 230 provided in the light emitting panel 100 changed in shape by the panel advance signal F can transmit the sound signal in the high frequency range. It is possible to generate a high-frequency output signal (H) that changes the acoustic characteristics of ).

Referring to FIG. 6, the light emitting device 1000 further includes an image changing unit 500 for changing image information displayed on the light emitting panel 100 according to a signal from the panel driving signal unit 110. I can. When the light-emitting panel 100 is transmitting an image, when the panel advance signal F and the panel reverse signal are generated, the shape of the light-emitting panel 100 moves forward or backward and changes its shape. Even if the shape of the light emitting device 1000 is changed by changing the effect of the image transmitted by the 100, the image observed by the user can be constantly enjoyed.

When the light emitting device 1000 is composed of a plurality of the sound devices 200, partitions each surrounding regions of the sound device 200 and forming an air gap space in the output region of the sound device 200 It may further include, and the partition wall portion may absorb sound when the plurality of sound devices 200 generate output sound having different characteristics to prevent interference of sound generated from each of the sound devices.

The present invention is a noise reduction device including the light emitting panel 100, the sound device 200, and the sound controller 300 according to the above description, and an embodiment of the present invention will be described hereinafter.

Example 1. Light-emitting device having noise reduction function

It may be a lighting device or a display panel including the light-emitting panel 100, the sound device 200, and the sound controller 300, and when the sound controller 300 is a display panel, the sound source generator 370 ) May be further included.

Referring to FIG. 2, when the light emitting device 1000 is a lighting device, the light emitting device 1000 may be a generally used OLED lighting, and the light emitting device 1000 may be formed in various forms. The light emitting device 1000 may change the frequency range of the noise signal N that the user wants to manually reduce through an operation processing device, and may be automatically changed. Through this, it is possible to obtain an effect of reducing noise in a preset frequency range in a place where the lighting device is installed.

Referring to FIG. 3, when the light emitting device 1000 is a display panel, the light emitting device 1000 may be a device that outputs images and audio, and the display panel may be formed in various shapes. The display panel may also set the filter 310 to select or automatically set the noise signal N to be removed, and the sound source signal A generated by the sound source generator 370 and the filter 310 and The output acoustic synthesis unit 350 receives and synthesizes the canceling signal C generated through the noise reduction unit 330 and outputs it to the outside through the sound transmitter 230. Through this, the display device can obtain an effect of more clearly listening to a sound source to be heard by reducing noise in a frequency range to be reduced.

Example 2. Light-emitting device having noise reduction function of changing shape

It may be a lighting device or a display panel including the light-emitting panel 100, the sound device 200, the sound controller 300, the panel drive signal part 110, and the panel shape change part 130, In the case of a display panel, the sound controller 300 may further include the sound source generator 370.

When the light-emitting device 1000 is a lighting device, the lighting device of the first embodiment further includes the panel drive signal unit 110 and the panel shape change unit 130, and the light-emitting device 1000 is Since the light emitting device 1000 can change its shape while moving forward or backward according to the signal N, an aesthetic effect can be obtained through this.

In addition, referring to FIG. 5, when the light emitting device 1000 is a lighting device, further including the sound change unit 400, the panel driving signal unit 110 transmits a panel advance signal or a panel retreat signal. Thus, when the predetermined light-emitting panel 100 changes its shape while the panel advances or retreats, the acoustic characteristics of the sound transmitter 220 located on the light-emitting panel 100 are changed, and the sound transmitter 220 is stunned. It can be changed to transmit low or high frequencies in the specified range. This has the advantage of being able to emit effectively according to the frequency characteristic of the cancellation signal C emitted through the acoustic transmitter 220.

Referring to FIG. 7, when the light emitting device 1000 is a display device, the panel drive signal unit 110 and the panel shape change unit 130 are further provided in the display device of the first embodiment. The device 1000 may change the shape of the light emitting device 1000 according to the noise signal N, and may exhibit an equalizer effect for a preset mode, or each By changing the low-frequency and high-frequency acoustic characteristics of the acoustic device 200, a surround sound effect according to the shape of the display device can be displayed, so that a rich and clear sound can be experienced in accordance with the user's environment.

In addition, the light-emitting device 1000 further includes the image change unit 500 to provide an image effect according to the changed form even if the light-emitting panel 100 changes its shape when the display device is outputting an image. Thus, even if the shape of the display device is changed, the user can view the same image.

The light-emitting device 1000 is formed of a lighting device and a display device provided in a daily life environment, and can provide comfort by reducing noise generated by a user in daily life, and is arranged as a display of a home appliance, It is effective in improving the health of users as it can control the low frequencies generated by home appliances. In addition, since it is arranged as an internal display of a car, noise generated during driving can be reduced and a clear and vivid sound effect can be provided when listening to music, so that the driver can drive comfortably.

In addition, the light-emitting device 1000 may change its shape by moving the light-emitting panel 100 forward or backward. When the offset signal C is output to the outside through the acoustic transmitter 230, the low frequency wavelength is higher than the high frequency. By using the characteristic of the frequency that can be transmitted to a long distance, the sound change unit 400 can effectively reduce the noise by adjusting the sound characteristics of the sound device 200 located on the light emitting panel 100 whose shape has been changed. There is an advantage to be able to.

The light emitting device 1000 is provided as lighting and display in a space requiring quietness, such as a library or a museum gallery, and maintains quietness through a noise reduction function, and an aesthetic effect can be obtained because the shape can be changed. In addition, the surround sound effect using the plurality of sound devices 200 may be used to efficiently expose advertisements in movie theaters, exhibition halls, and fairs, or to help users experience various experiences.

The light emitting device 1000 can be formed in various shapes, and since it can be formed as a lighting device and a display, it can be used in home appliances that generate low frequencies or lighting used in everyday life, and is also applicable to OLEDs, Since it can be combined with IoT technology, it has the advantage that it can be applied to various technical fields.

As described above, in the present invention, specific matters such as specific components and the like have been described by the drawings of limited embodiments, but this is provided only to help a more general understanding of the present invention, and the present invention is limited to the above-described embodiment. It is not, and those of ordinary skill in the field to which the present invention pertains can make various modifications and variations from this description.

Therefore, the spirit of the present invention is limited to the described embodiments and should not be determined, and all things that are equivalent or equivalent to the scope of the claims as well as the claims to be described later belong to the scope of the spirit of the present invention. .

1000: light emitting device
100: light-emitting panel 110: panel driving signal unit
130: panel shape change part
200: sound device 210: sound receiver
230: sound transmitter
300: sound controller 310: filter
330: noise reduction unit 350: output sound synthesis unit
370: sound source generation unit
400: sound change unit
500: image change unit

Claims (15)

In the light emitting device 1000,
A light-emitting panel 100 for emitting light;
A panel driving signal unit 110 for generating a signal for changing the shape of the light emitting panel 100;
A panel shape changing unit 130 for receiving a signal generated by the panel driving signal unit 110 and changing the shape of the light emitting panel 100 according to the signal;
One or more acoustic devices 200 provided in the light emitting panel 100, including an acoustic receiver 210 for receiving sound and an acoustic transmitter 230 for transmitting sound;
Consisting of including a filter 310 for extracting a noise signal (N) from the sound signal received by the sound receiver 210, is connected to the sound device 200, and is received by the sound receiver 210 A sound controller 300 for generating a signal for reducing noise and outputting the signal to the sound transmitter 230;
Including,
The panel drive signal unit 110,
Receiving and analyzing the noise signal (N) extracted by the filter 310 of the sound controller 300,
Based on the frequency information of the noise signal (N) analyzed for a certain time,
Generating a panel advance signal (F) or a panel retreat signal (B) and transmitting it to the panel shape change unit 130
A light-emitting device having a noise reduction function, characterized in that.
The method of claim 1,
The sound controller 300,
When receiving the noise signal N extracted by the filter 310, a noise reduction unit 330 for generating a cancellation signal C having an opposite wave to that of the noise signal N;
Including; an output acoustic synthesis unit 350 for receiving the cancellation signal (C) of the noise reduction unit 330 and transmitting the cancellation signal (C) to the sound transmitter 230;
A light emitting device having a noise reduction function, characterized in that.
delete delete The method of claim 1,
The panel shape change unit 130,
Based on the panel advance signal F received from the panel driving signal unit 110, at least one predetermined area of the light emitting panel 100 advances and the shape of the panel is changed.
A light emitting device having a noise reduction function, characterized in that.
The method of claim 1,
The panel shape change unit 130,
Based on the panel retreat signal B received from the panel driving signal unit 110, at least one predetermined area of the light emitting panel 100 is retracted and the shape of the panel is changed.
A light emitting device having a noise reduction function, characterized in that.
The method of claim 1,
The light emitting device 1000 includes a plurality of the sound devices 200,
Further comprising a sound change unit 400 for generating sound control signals for each of the sound devices 200 to have different sound characteristics in order to exhibit a surround sound effect.
A light-emitting device having a noise reduction function, characterized in that.
The method of claim 7,
The sound change unit 400, according to the signal from the panel shape change unit 130,
Generates a low frequency output signal (L) for changing the acoustic characteristics of the sound transmitter 230 so that the sound device 200 located in the retracted portion of the light emitting panel 100 transmits a low frequency,
Generating a high frequency output signal (H) for changing the acoustic characteristics of the sound transmitter 230 so that the sound device 200 located in the advanced portion of the light emitting panel 100 transmits a high frequency
A light emitting device having a noise reduction function, characterized in that.
The method of claim 2,
When the light emitting panel 100 is a display panel,
The sound controller 300 further includes a sound source generator 370 for generating a sound source signal A of sound to be output from the sound transmitter 230 to the outside;
The output acoustic synthesis unit 350 further receives a sound source signal (A), and transmits an output signal generated by synthesizing the offset signal (C) and the sound source signal (A) to the sound transmitter 230
A light emitting device having a noise reduction function, characterized in that.
The method of claim 1,
The light emitting device 1000 further includes an image change unit 500,
The image change unit 500 changes image information displayed on the light emitting panel 100 according to a signal from the panel driving signal unit 110
A light emitting device having a noise reduction function, characterized in that.
The method of claim 1,
The sound device 200,
Including an acoustic actuator for generating sound by directly vibrating the light emitting panel 100
A light emitting device having a noise reduction function, characterized in that.
The method of claim 1,
The light emitting panel 100,
Having any one or more of one or more curves and one or more straight lines
A light emitting device having a noise reduction function, characterized in that.
The method of claim 1,
The light emitting panel 100,
Having variability in which the shape of the panel is flexible
A light emitting device having a noise reduction function, characterized in that.
The method of claim 1,
The light emitting panel 100,
A plurality of panel modules are combined with each other to include as the light emitting panel 100
A light emitting device having a noise reduction function, characterized in that.
The method of claim 1,
A partition wall portion formed to surround each region of the plurality of acoustic devices 200 to form an air gap space in the output region of the acoustic device 200; further comprising:
A light emitting device having a noise reduction function, characterized in that.

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