Flat speaker capable of uniformly outputting sound from single flat plate

Abstract

The present invention relates to a flat speaker wherein original pictures such as drawings and photographs are attached to the front surface of a flat substrate such that, while providing an aesthetic sense, the amplitude can be linearly and uniformly output in the entire frequency band. To this end, the present invention provides a flat speaker comprising: a single flat substrate; and a vibrator and a support plate having a certain thickness for supporting the vibrator, both of which are formed at the center of the flat substrate, wherein an area of a substrate area, in which the support plate is formed, forms a high-pitched sound portion, and other areas of the substrate area, excluding the area in which the support plate is formed, forms a low-pitched sound portion.

Description

Planar speaker with uniform output from a single flat panel

[0001] The present invention relates to a speaker, and more particularly, to a flat speaker capable of providing an aesthetic sense by allowing an original picture, such as a picture or photograph, to be attached to the front surface of a flat substrate, while also enabling a linear and uniform output volume across the entire frequency band where sound output is required.

[0002] The speed of sound in a solid is different between longitudinal waves that are elastic due to compression deformation and transverse waves that are elastic due to shear deformation.

[0003] The speed of a longitudinal wave in a solid is given by the following mathematical expression 1.

[0004]

[0005] The speed of a transverse wave in a solid is given by the following mathematical equation 2.

[0006]

[0007] Here, in Equations 1 and 2, B = bulk elastic modulus of the medium (the degree to which an object resists compression when a uniform compressive force is applied to the object in all directions), P = density of the medium, and G = shear elastic modulus.

[0008] In the case of sound (sound waves), most are longitudinal waves and have the value [speed of sound = frequency × wavelength].

[0009] In most cases, the bulk modulus (B) increases more significantly than the density (P) of the medium, so the higher the density of the medium, the greater the speed of sound within the medium.

[0010] In addition, as the thickness increases, the bulk modulus (B) increases, so the sound speed within the medium increases, and the high-pitched sound generation rate relatively increases. At this time, the frequency increases based on the same medium length (wavelength), and the high-pitched sound generation rate relatively increases.

[0011] Accordingly, the characteristics of a good speaker are basically the same as the amplitude of the entire frequency band that requires sound output, and the better the characteristics are, the more linearly uniform the output amplitude of the entire frequency band (bass to treble) is.

[0012] On the other hand, the deeper the valleys and peaks in the output volume (Amplitude) characteristic curve, the worse the sound quality due to poor speaker characteristics.

[0013] In other words, there is a need for a method to linearly equalize the low and high sound output volume from one flat plate (diaphragm).

[0014] The present invention is intended to solve the above-mentioned problem, and the purpose of the present invention is to provide a planar speaker that can linearly and uniformly provide output volume in the entire frequency band where sound output is required, by forming a planar substrate, a vibrator and a support plate of a predetermined thickness that supports the vibrator at the center of the planar substrate, such that the substrate area where the support plate is formed forms a high-pitched sound section, and the remaining substrate area excluding the area where the support plate is formed forms a low-pitched sound section.

[0015] In addition, the purpose is to provide an aesthetic sense with artistic or visual decoration by allowing original drawings, photographs, or other printed materials to be attached to the front of the flat vibration plate.

[0016] To this end, one embodiment of the present invention provides a planar speaker comprising a planar substrate, a vibrator and a support plate of a predetermined thickness that supports the vibrator at the center of the planar substrate, such that a substrate region where the support plate is formed forms a high-pitched sound section, and a substrate region other than the region where the support plate is formed forms a low-pitched sound section.

[0017] Another aspect of the present invention provides a planar speaker comprising: a planar substrate; a separator having a predetermined thickness formed at the center of the planar substrate; a first vibrator formed symmetrically on one side with the separator interposed therebetween; a second vibrator formed at the other side; the first vibrator and the second vibrator formed at the center of one side substrate and the center of the other side substrate, respectively, separated by the separator; a first support plate having a predetermined thickness for supporting the first vibrator and a second support plate having a predetermined thickness for supporting the second vibrator; one side substrate region where the first support plate is formed and the other side substrate region where the second support plate is formed form one high-pitched sound portion and the other high-pitched sound portion, respectively; and one side and the other side substrate regions excluding the region where the first support plate is formed and the region where the second support plate is formed form a low-pitched sound portion.

[0018] In addition, it is preferable to use any one of fiber, paper, wood, synthetic resin, metal material, glass plate, stone plate, and reinforced carbon plate as the material of the above-mentioned flat substrate.

[0019] Additionally, it is possible to attach original drawings or set printed materials such as pictures or photographs to the front surface of the above-mentioned flat substrate.

[0020] Additionally, it is preferable that the vibrator, the first vibrator or the second vibrator is in the form of an electric vibrator or a mechanical vibrator.

[0021] In addition, it is preferable that the high-pitched sound part, one-sided high-pitched sound part or the other-sided high-pitched sound part, and the low-pitched sound part, one-sided low-pitched sound part or the other-sided low-pitched sound part form a curved structure that linearly extends from the center of the vertex to the edge.

[0022] Additionally, the cross-sectional area and the volume elastic modulus or the high-pitched sound generation rate of the above-mentioned support plate, the first support plate, and the second support plate can be set in an inversely proportional relationship.

[0023] In addition, it is preferable that the thickness of the separator plate is equal to or greater than the thickness of the first support plate and the second support plate.

[0024] Additionally, a wired or wireless audio streaming interface is available.

[0025] In addition, the above sound source streaming interface may further include an audio speaker control unit that enables output volume adjustment for each 3WAY (Bass / Middle / Treble) or 2WAY (Bass / Treble) band.

[0026] The present invention enables a planar speaker, which forms a single vibrator on a single plate, to output high and low tones distinctly. This allows for a linear and uniform output volume (amplitude) across the entire frequency range (from low to high) where sound output is required, even when the vibrator and speaker are implemented as a flat plate. Furthermore, the flat plate can be provided with an original drawing, photograph, or other printed material to be displayed attached to the front surface, thereby providing an aesthetic sense of artistic beauty or visual decoration.

[0027] In addition, the left and right board areas can be separated through a separator plate on a single flat plate, and stereo output sound can be provided with two-channel separate output.

[0028] Figure 1 is a drawing showing a planar speaker (100) according to a preferred embodiment of the present invention when viewed from above.

[0029] Figure 2 is a drawing showing a planar speaker (100) according to a preferred embodiment of the present invention when viewed from behind.

[0030] FIG. 3 is a drawing showing a configuration in which an audio speaker system is added to a flat speaker (100) according to a preferred embodiment of the present invention.

[0031] FIG. 4 illustrates a planar speaker (200) according to another preferred embodiment of the present invention, including (a) a plan view, (b) a rear view, and (c) a side view.

[0032] Hereinafter, a planar speaker according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0033] FIG. 1 is a plan view showing a planar speaker (100) according to a preferred embodiment of the present invention when viewed from above, FIG. 2 is a view showing a planar speaker (100) according to a preferred embodiment of the present invention when viewed from behind, and FIG. 3 is a view showing a configuration in which an audio speaker system is added to a planar speaker (100) according to a preferred embodiment of the present invention.

[0034] Referring to FIGS. 1 to 3, a speaker (100) according to the present invention includes a substrate (110) formed on the front surface, a vibrator (131a, 131b) that mechanically generates vibrations in the substrate by an electrical audio signal supplied from an external sound source (101), and a high-pitched sound section (130a, 130b) that supports the vibrator (131a, 131b) and is formed between the vibrator and the substrate.

[0035] At this time, when the vibrator (131a, 131b) is driven by an electrical signal supplied from the outside (e.g., a digital audio signal) to generate vibration, the high-pitched sound portion (130a, 130b) supporting the vibrator can transmit the mechanical vibration generated by the vibrator (131a, 131b) to the substrate, thereby providing sounds of different pitches between the high-pitched sound portion and the low-pitched sound portion on the substrate (110).

[0036] Here, the sound source (Audio Signal Source) (101) provided as a digital audio signal can be transmitted through a streaming interface via wire or wireless (Bluetooth, AIR-Play, Wi-Fi, etc.).

[0037] In addition, the substrate (110) is a base plate that functions as a motherboard and acts as a diaphragm. Accordingly, it converts the supplied digital audio signal into an acoustic signal as a diaphragm that receives the mechanical vibration generated by the vibrators (131a, 131b). The substrate (110) may be made of a metal plate such as iron or SUS, a synthetic resin plate such as acrylic or plastic, a paper material plate such as pulp, a wood plate such as plywood or raw wood, or a fiber material. In addition, materials that can be used for various types of boards, such as a glass plate, a stone plate (a stone plate such as artificial marble), or a reinforced carbon plate, may be further added. In particular, original drawings such as pictures or photographs or printed materials to be displayed can be attached to the front surface of the substrate (110), thereby providing an aesthetic sense with an artistic or visual decorative beauty.

[0038] In this way, if you want to attach original drawings, photographs, or other printed materials to be displayed to the substrate (110) as a front sounding board, a flat plate is preferable, and if you implement a vibration plate and speaker with a flat plate, it is necessary to provide linearly and uniformly the output volume (amplitude) in the entire frequency band (low to high) where sound output is required. For example, in existing speakers, it is desirable for the entire surface to vibrate with the same amplitude and in phase, so a shallow spherical or conical plate is used instead of a flat plate as the vibration plate.

[0039] On the other hand, since the present invention uses a flat diaphragm, it provides a flat plate speaker with uniform sensitivity across the entire required frequency range.

[0040] To this end, in the present invention, the substrate (110) as a flat vibration plate is largely divided into three parts, each 1 / 3 in area, and the left and right vibration parts (A, B) and the center part (C, 120) can be divided into a separation part that separates the output sound of the left vibration part (A) and the right vibration part (B).

[0041] At this time, the vibrators (131a, 131b) are formed symmetrically on the left vibrating part (A) and the right vibrating part (B) on the substrate (110), so that stereo sound can be implemented on the substrate (110).

[0042] Here, the vibrator (131a, 131b) is preferably in the form of an electromagnetic vibrator. For example, a form may be used in which the vibrator (131a, 131b) comprises a stator made of an electromagnet and a magnetic vibrator, and a vibrating force is generated by repeatedly moving the vibrator toward the stator and then returning to the original position when a vibrating current is applied to the electromagnet coil of the stator. In another form, a vibrator form may be used in which a vibrating force is generated by applying a vibrating current to the electromagnet coil of the stator to vibrate the magnetic vibrator using the magnetic force generated. In addition, the vibrator (131a, 131b) may be used in the form of a mechanical vibrator using a piezoelectric element, in addition to an electric vibrator such as an electromagnetic vibrator.

[0043] In addition, the vibrators (131a, 131b) are formed symmetrically on the left and right sides on a flat substrate (110) in the form of a single module, and in order to provide uniform stereo sound to the left and right flat substrates (110), it is preferable that the module form have a circular cross section.

[0044] Additionally, in the case of the left and right diaphragms (A, B), the high and low tones can be separated relatively in the left diaphragm (A) or the right diaphragm (B).

[0045] That is, a high-pitched sound section can be formed by forming support plates for supporting the left and right vibrators (131a, 131b) on the substrate (110) in the portion where the left vibrator (131a) is formed and in the portion where the right vibrator (131b) is formed, respectively. For example, the area where the support plate (130a) supporting the left vibrator is formed forms the left high-pitched sound section (A-Hi), and the remaining upper and lower left diaphragm areas separated through the left high-pitched sound section (A-hi) form the left low-pitched sound section (A-Lo). In this way, in the case of the left diaphragm (A), it can also be divided into high-pitched sound sections and low-pitched sound sections through the left support plate (130a) having a predetermined thickness and area.

[0046] In addition, the right diaphragm (B) can be divided into high-pitched and low-pitched regions through the right support plate (130b) having the same thickness and area as the left diaphragm (A) symmetrically. This is in accordance with the volume modulus (B) of the aforementioned mathematical expressions 1 and 2 in order to separate high-pitched and low-pitched sounds in a planar diaphragm. For example, as the thickness increases, the volume modulus (B) increases, so the sound speed in the medium increases and the high-pitched sound generation rate relatively increases. At this time, the frequency increases based on the same medium length (wavelength), and the high-pitched sound generation rate relatively increases. Accordingly, a left treble section (A-Hi) and a right treble section (B-hi) are formed on the left diaphragm (A) and the right diaphragm (B), respectively, and for this purpose, a left support plate (130a) and a right support plate (130b) having a predetermined thickness greater than the substrate (110) are symmetrically attached (added) to the substrate (110), and the left support plate (130a) functions as a support plate supporting the left vibrator (131a), and the right support plate (130b) functions as a support plate supporting the right vibrator (131b). At this time, it is preferable for the left support plate (130a) and the right support plate (130b) to have symmetrically the same thickness and the same cross-sectional area for uniform sound reproduction. In addition, the thinner the thickness of the left support plate (130a) and the right support plate (130b), the better, but it is preferable that it is 0.2 to 1.5 times the thickness of the substrate. Through this, the overall high-pitched part (A-Hi, B-Hi) becomes thicker by 1.2 to 2.5 times in height than the low-pitched part (A-Lo, B-lo), and the thicker the thickness is according to the aforementioned volume elasticity (b), the higher the high-pitched sound generation rate becomes relatively. Accordingly, the left support plate (130a) and right support plate (130b) areas are high-pitched parts and have a relatively higher high-pitched sound generation rate than the remaining (A-Lo, B-Lo) parts. Through this, it is possible to reproduce sound by dividing it into high-pitched parts and low-pitched parts from the left diaphragm (A) and the right diaphragm (B).

[0047] In addition, as seen in mathematical expression 1, since the bulk elastic modulus (b) increases more greatly as the density increases, the high-pitched sound generation rate is relatively high, so it is necessary to form the left and right support plates (130a, 130b) so that the cross-sectional area of ​​each of the left and right support plates (130a, 130b) is at least smaller than the entire cross-sectional area of ​​each of the left and right diaphragms (A, B) so as to support each of the left and right vibrators (131a, 131b) so that the high-pitched sound generation rate is higher in the left and right support plates (130a, 130b) portions. In addition, as the sound is high-pitched, the motion displacement of the diaphragm decreases, so that the cross-sectional area that actually participates in the vibration decreases, causing vibration only near the center of the diaphragm (vibrator forming portion). This is also the reason why the left and right support plates (130a, 130b) that support the left and right vibrators are placed directly below the vibrators.

[0048] In this way, the cross-sectional area of ​​each of the left and right support plates (130a, 130b) that support the left and right vibrators (131a, 131b) is made at least smaller than the entire cross-sectional area of ​​each of the left and right diaphragms (A, B) to form a high-pitched sound region. The remaining left substrate (A-Lo) and right substrate (B-Lo) regions are considered low-pitched sound regions and have a relatively higher low-pitched sound generation rate than the regions near the left and right support plates (130a, 130b).

[0049] This allows the left and right support plates (130a, 130b) to form a linear and even output volume (Amplitude) characteristic in all areas of the entire frequency band, by summing the output characteristics of the high-pitched sound (A-Hi, B-Hi) and the remaining low-pitched sound (A-Lo, B-Lo).

[0050] Additionally, a separating plate (120, C) can be formed to separate the left and right support plates (130a, 130b) to implement stereo sound.

[0051] The above separator plate (120, C) can be formed in the form of a kind of partition wall of a certain height to separate the left and right output sounds. Accordingly, the separator plate (120) has a thickness at least equal to or greater than the left and right support plates (130a, 130b), and since a thin flat plate is generally advantageous in terms of aesthetics and sound reproduction, the maximum thickness is preferably not more than 1.5 times that of the left and right support plates.

[0052] In this way, the left and right vibration plates can be separated through the central separator (120,C), which serves to distinguish between two channels (stereo).

[0053] Referring to FIG. 3, a sound source (Audio Signal Source) (101) provided as a digital audio signal is transmitted through a streaming interface via wire or wireless (Bluetooth, AIR-Play, Wi-Fi, etc.), and at this time, vibrators (131a, 131b) are formed symmetrically on the left vibrating part (A) and the right vibrating part (B) on the substrate (110) to implement stereo sound on the substrate (110).

[0054] In addition, when providing stereo sound from the substrate (110) of the flat speaker (100) in the sound source (101), an audio speaker control unit (102) can be further added. Here, the audio speaker control unit (102) can be configured with a first audio speaker control unit (103) and a second audio speaker control unit (104) equipped with an audio power amplifier so as to implement two channels symmetrically on the left and right.

[0055] Through this, the first audio speaker control unit (103) provides a channel 1 (left) signal provided by the sound source (101) to the left vibrator (131a), and when the left vibrator (131a) is driven by the channel 1 (left) signal to generate vibration, the generated mechanical vibration is transmitted to the substrate (110) to implement a speaker. At this time, the first audio speaker control unit (103) can adjust the output volume for each of the 3WAY (Bass / Middle / Treble) bands, and can be configured in the form of three output volume control buttons.

[0056] In addition, the second audio speaker control unit (104) can also provide a channel 2 (right) signal provided as a sound source (101) to the right vibrator (131b), and when the right vibrator (131b) is driven by the channel 2 (right) signal to generate vibration, the generated mechanical vibration can be transmitted to the substrate (110) to implement a speaker. At this time, the second audio speaker control unit (104) can also adjust the output volume for each of the 3WAY (Bass / Middle / Treble) bands, and can be configured in the form of three output volume control buttons.

[0057] Additionally, it is also possible to adjust the output volume for each 2-way band, bass and treble, more simply.

[0058] FIG. 4 illustrates a planar speaker (200) according to another preferred embodiment of the present invention, including (a) a plan view, (b) a rear view, and (c) a side view.

[0059] Referring to FIG. 4, a planar speaker (200) according to another preferred embodiment of the present invention is similar to the planar speaker (100) described in FIGS. 1 to 3 in that the support structure of the vibrator is not a stepped support plate type but a non-stepped dome-shaped curved structure in some or all directions. Accordingly, descriptions of the same structure as the planar speaker (100) described in FIGS. 1 to 3 will be omitted, and descriptions will be focused on the differences.

[0060] As illustrated in FIG. 4, instead of attaching the front substrate (210) in the form of a step-shaped support plate (130, 130b), a multi-layered dome-shaped or linear dome-shaped support plate (240a, 240b) is formed. At this time, a curved structure in which the high-pitched part (A-Hi, B-hi) at the center where the vibrator (231a, 231b) is formed is high and the height decreases as it goes from the high-pitched part at the center to the edge part can be formed, so that the remaining part except for the high-pitched part at the center can be formed as a low-pitched part (A-Lo, B-Lo). Such a multi-layered dome-shaped or linear dome-shaped or other overall curved structure support plate (240a, 240b) enables the formation of a high-pitched sound in which the central vertex of the curve where the vibrator is formed forms a high-pitched part and the low-pitched part goes from the central vertex to the lower edge part.

[0061] In addition, a support plate (240a, 240b) having an overall curved structure, such as a multilayer dome shape or a linear dome shape, may be formed on the right diaphragm (B) symmetrically to the left diaphragm (A), thereby dividing the high-pitched sound and the low-pitched sound areas. This is in accordance with the volume modulus (B) of the aforementioned mathematical expressions 1 and 2, in order to separate the high-pitched sound and the low-pitched sound in the curved diaphragm. For example, since the height and thickness at the vertex are relatively larger than those at the edge, the volume modulus (B) increases, which increases the sound speed in the medium and relatively increases the high-pitched sound generation rate. At this time, it is preferable that the left curved structure (240a) and the right curved structure (240b) are formed as a volume structure having the same thickness and the same cross-sectional area symmetrically for uniform sound reproduction.

[0062] Accordingly, the vertex area where the left and right vibrators are formed in the left curved structure (240a) and the right curved structure (240b) functions as a high-pitched sound section, and the other linear curved portions (A-Lo, B-Lo) extending from the vertex to the edge function as a low-pitched sound section. This enables stereo sound to be reproduced by symmetrically dividing the left diaphragm (A) and the right diaphragm (B) into high-pitched sound and low-pitched sound sections. In addition, in the above-mentioned curved structure, it is also possible to form a stepped output sound of three or more steps, high-pitched sound, mid-pitched sound (approximately between high-pitched sound and low-pitched sound), and low-pitched sound, depending on the linear distance from the center of the vertex to the edge.

[0063] In addition, a second separating plate (220, C) may be formed to separate the left and right curved structures (240a, 240b) to implement stereo sound. At this time, the support plate of the left curved structure (240a) or the right curved structure (240b) may be formed as a curved structure support plate on the entire left side or the entire right side excluding the area of ​​the second separating plate (220, C), or the curved structure support plate may be formed only on a part of the left side or only on a part of the left side.

[0064] As seen above, the left curved structure (240a) or the right curved structure (240b) can be formed in the form of a support plate that supports the left and right vibrators (231a, 231b) to the front substrate (210), but can also be formed in the form of a packaging structure that covers the left and right vibrators (231a, 231b) while maintaining the curved structure itself.

[0065] The second separator (220,C) may be formed in the form of a kind of partition wall of a certain height to separate the left and right output sounds. Accordingly, the second separator (120) must have a thickness at least equal to or greater than the height (thickness) of the vertices of the left and right curved structures (240a, 240b) to enable separation. In addition, since a thin flat plate is generally advantageous in terms of aesthetics and sound reproduction, the maximum thickness is preferably no more than 1.5 times.

[0066] In this way, the left and right vibration plates can be separated through the second separation plate (120,C) in the center, which serves to distinguish between two channels (stereo).

[0067] In the above, the stereo output is mainly explained by separating the left and right boards through a separator plate, and thus two-channel separate output is possible. However, if the separator plate is not formed, it is also possible to separate the high and low frequencies with a single flat plate at the center and edge of the flat board.

[0068] That is, by forming a single planar substrate, a vibrator and a support plate of a predetermined thickness that supports the vibrator at the center of the planar substrate, the substrate region where the support plate is formed forms a high-pitched sound section, and the remaining substrate region excluding the region where the support plate is formed forms a low-pitched sound section. Through this, it is possible to output high and low sounds separately with a single vibrator using a single flat plate.

[0069]

[0070] The embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art will recognize that various modifications, changes, and additions can be made within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the present patent claims.

[0071] <Explanation of symbols>

[0072] 100, 200: Speaker

[0073] 110, 210: substrate

[0074] 120, 220: Separator

[0075] 130a, 130b; treble

[0076] 131a, 131b, 231a, 231b: vibrators

[0077] 132a, 132b: Bass

[0078] 240a, 240b: Curved structure

[0079]

[0080] The present invention provides a planar speaker that forms low-frequency and high-frequency output sections on a single plate (diaphragm) and can provide linearly and uniformly output volume across the entire frequency band where sound output is required.

[0081] In addition, it is possible to attach original drawings, photographs, or other printed materials to be displayed to the front of the flat vibration plate, allowing it to be used as a design for artistic aesthetics or visual decoration.

Claims

1. One flat substrate, A vibrator and a support plate of a predetermined thickness that supports the vibrator are formed at the center of the above-mentioned flat substrate, A planar speaker characterized in that the substrate area where the support plate is formed forms a high-pitched sound section, and the remaining substrate area excluding the area where the support plate is formed forms a low-pitched sound section.

2. One flat substrate, A separator having a predetermined thickness is formed at the center of the above-mentioned flat substrate, and a first vibrator is formed symmetrically on one side with the separator in between, and a second vibrator is formed on the other side. The first vibrator and the second vibrator are formed at the center of one substrate and the center of the other substrate, respectively, separated by the separator, and a first support plate of a predetermined thickness supporting the first vibrator and a second support plate of a predetermined thickness supporting the second vibrator are formed. A planar speaker characterized in that one side substrate area where the first support plate is formed and the other side substrate area where the second support plate is formed form one side high-frequency section and the other side high-frequency section, respectively, and the other side substrate areas excluding the area where the first support plate is formed and the area where the second support plate is formed form a low-frequency section.

3. In paragraph 1 or 2, A flat speaker characterized in that the material of the flat substrate is any one of fiber, paper, wood, synthetic resin, metal material, glass plate, stone plate, and reinforced carbon plate.

4. In paragraph 1 or 2, A flat speaker characterized in that an original drawing or set printed matter such as a picture or photograph can be attached to the front surface of the flat substrate.

5. In paragraph 1 or 2, A planar speaker, characterized in that the above vibrator, the first vibrator or the second vibrator is an electric vibrator or a mechanical vibrator.

6. In paragraph 1 or 2, A flat speaker characterized in that the high-pitched sound section, one-sided high-pitched sound section or the other-sided high-pitched sound section, and the low-pitched sound section, one-sided low-pitched sound section or the other-sided low-pitched sound section form a curved structure that linearly extends from the center of the vertex to the edge.

7. In paragraph 1 or 2, A planar speaker characterized in that the cross-sectional area and volume elasticity or high-pitched sound generation rate of the above-mentioned support plate, the first support plate, and the second support plate are inversely proportional.

8. In paragraph 2, A flat speaker, characterized in that the thickness of the separator is equal to or greater than the thickness of the first support plate and the second support plate.

9. In paragraph 1 or 2, A flat speaker characterized by forming a sound source streaming interface, either wired or wireless.

10. In paragraph 9, A flat speaker characterized in that the above sound source streaming interface further includes an audio speaker control unit that enables output volume adjustment for each 3WAY (Bass / Middle / Treble) or 2WAY (Bass / Treble) band.

Images