KR102627971B1 - A flat speaker capable of uniform output with one flat panel - Google Patents

Abstract

The present invention relates to a planar speaker that allows an original drawing, such as a painting or photograph, to be attached to the front of a planar substrate, thereby providing an aesthetic sense and enabling output volume to be linearly uniform across all frequency bands.
To this end, the present invention forms a planar substrate, a vibrator at the center of the planar substrate, and a support plate of a predetermined thickness supporting the vibrator, the area of the substrate where the support plate is formed forms a treble region, and the support plate is formed The remaining substrate area excluding this area provides a planar speaker that forms a low-pitched sound section.

Description

A flat speaker capable of uniform output with one flat panel}

The present invention relates to a speaker, and more specifically, to enable attachment of original drawings, such as paintings and photographs, to the front of a flat board, thereby providing an aesthetic sense and maintaining the output volume in the entire frequency band where sound output is required. This relates to a planar speaker that is capable of being linearly uniform.

The speed of sound in solids includes longitudinal waves generated by elasticity against compressive deformation and transverse waves generated by elasticity against shearing deformation, and their sound speeds are different.

The speed of longitudinal waves in a solid is given in Equation 1 below.

The speed of a transverse wave in a solid is given in Equation 2 below.

Here, in Equation 1 and Equation 2, B = bulk modulus of elasticity of the medium (the degree of resistance to being compressed when a uniform compressive force is applied to the object in all directions), P = density of the medium, G = layer pushing refers to the modulus of elasticity.

In the case of sound (sound waves), it is mostly a longitudinal wave and has the value of [sound speed = frequency × wavelength].

Compared to the increase in density (P) of most media, the bulk modulus (B) increases more significantly, so the higher the density of the medium, the greater the speed of sound in the medium.

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

Accordingly, the characteristics of a good speaker are basically based on a signal input where the volume (Amplitude) of all frequency bands that require sound output is the same. The more linearly the output volume (Amplitude) of all frequency bands (low to high) is uniform, the better the characteristics. have

On the other hand, the deeper the valleys and peaks in the output amplitude characteristic curve, the worse the sound quality becomes due to poor speaker characteristics.

In other words, there is a need for a method to linearly equalize the output volume of low and high sounds on one plate (diaphragm).

Korea Public Utility Model Publication No. 20-20007-0000470 (published on April 24, 2007) Korean Patent Publication No. 10-2006-0097839 (published on September 18, 2006)

The present invention is intended to solve the above-described problem, by forming a planar substrate, a vibrator at the center of the planar substrate, and a support plate of a predetermined thickness to support the vibrator, so that the area of the substrate where the support plate is formed produces high-pitched sounds. The purpose is to provide a planar speaker that can linearly and uniformly provide output volume in the entire frequency band requiring sound output by forming a low-pitched region in the remaining substrate area excluding the area where the support plate is formed. there is.

In addition, the purpose is to provide an aesthetic sense through artistic aesthetics or visual decoration by allowing attachment of original drawings such as paintings, photographs, etc., or printed materials to be displayed, on the front of the flat diaphragm.

To this end, one form of the present invention forms a planar substrate, a vibrator at the center of the planar substrate, and a support plate of a predetermined thickness supporting the vibrator, and the area of the substrate where the support plate is formed forms a high-pitched region, The remaining substrate area, excluding the area where the support plate is formed, provides a planar speaker that forms a low-pitched sound section.

Another form of the present invention includes forming one planar substrate and a separator plate of a predetermined thickness at the center of the planar substrate, forming a first oscillator on one side symmetrically with the separator plate in between, and forming a second vibrator on the other side. Forming two oscillators, the first oscillator and the second oscillator are formed at the center of one substrate and the center of the other substrate, respectively, separated through the separation plate, and a first support plate of a predetermined thickness supporting the first oscillator; A second support plate of a predetermined thickness is formed to support the second oscillator, and one side of the substrate where the first support plate is formed and the other side of the substrate region where the second support plate is formed form one treble part and the other treble part, respectively, and the first treble part is formed. Excluding the area where the support plate is formed and the area where the second support plate is formed, the remaining areas of the substrate on one side and the other side provide a planar speaker that forms a low-pitched sound section.

Additionally, the material of the flat substrate is preferably one of fiber, paper, wood, synthetic resin, metal, glass, stone, and reinforced carbon.

Additionally, it is possible to attach an original or set print, such as a painting or photograph, to the front of the flat substrate.

In addition, the vibrator, the first vibrator, or the second vibrator is preferably in the form of an electric vibrator or a mechanical vibrator.

In addition, it is preferable that the low-pitched part, one low-pitched part, or the other low-pitched part in the high-pitched part, one high-pitched part, or the other low-pitched part forms a curved structure linearly extending from the center of the vertex to the edge part.

In addition, it is preferable that the thickness of the separation plate is equal to or greater than the thickness of the first and second support plates.

Additionally, a wired or wireless music streaming interface is possible.

Additionally, the sound source streaming interface may further include an audio speaker control unit capable of adjusting the output volume for each 3WAY (Bass/Middle/Treble) or 2WAY (Bass/Treble) band.

The present invention can distinguish between high-pitched sounds and low-pitched sounds using a flat speaker that forms one vibrator on one flat plate. Through this, even if the diaphragm and speaker are implemented with a flat plate, the output volume (amplitude) can be provided linearly and uniformly in the entire frequency band (low to high) where sound output is required. In addition, it is possible to attach original drawings such as paintings, photographs, or printed matter to be displayed on the front of the flat plate, thereby providing an aesthetic sense through artistic aesthetics or visual decoration.

In addition, the left and right substrate areas can be separated on a single plate using a separator plate, and stereo output sound can be provided through two-channel separate output.

1 is a side view showing a planar speaker 100 according to a preferred embodiment of the present invention when viewed from the side;
Figure 2 is a rear view showing the planar speaker 100 according to a preferred embodiment of the present invention when viewed from behind;
Figure 3 is a diagram showing a configuration in which an audio speaker system is added to the planar speaker 100 according to a preferred embodiment of the present invention.
Figure 4 shows a planar speaker 200 according to another preferred embodiment of the present invention, which is (a) a side view, (b) a rear view, and (c) a top view.

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

Figure 1 is a side view showing the planar speaker 100 according to a preferred embodiment of the present invention when viewed from the side, and Figure 2 is a rear view showing the planar speaker 100 according to a preferred embodiment of the present invention when viewed from behind. 3 is a diagram showing a configuration in which an audio speaker system is added to the planar speaker 100 according to a preferred embodiment of the present invention.

Referring to FIGS. 1 to 3, the speaker 100 according to the present invention has a substrate 110 formed on the front surface, and a mechanical signal is applied to the substrate by an electrical audio signal supplied from an external sound source 101. It includes vibrators (131a, 131b) that generate vibration, and high-pitched parts (130a, 130b) that support the vibrators (131a, 131b) and are formed between the vibrators and the substrate.

At this time, when the vibrators (131a, 131b) are driven by an electrical signal (e.g., a digital audio signal) supplied from the outside to generate vibration, the high-pitched parts (130a, 130b) supporting the vibrator (131a) , The mechanical vibration generated by 131b) can be transmitted to the substrate, providing sounds of different pitches between the high-pitched and low-pitched portions on the substrate 110.

Here, the audio signal source 101 provided as a digital audio signal can be transmitted through a streaming interface, wired or wirelessly (Bluetooth, AIR-Play, Wi-Fi, etc.).

Additionally, the substrate 110 is a base plate that functions as a mother board and serves as a vibration plate. Accordingly, the diaphragm receives the mechanical vibration generated by the vibrators 131a and 131b and serves as a vibrating diaphragm to convert the supplied digital audio signal into an acoustic signal. The material of the substrate 110 may be 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 solid wood, or a fiber material. In addition, additional materials that can be used for various types of plates, such as glass plates, stone plates (artificial marble, etc.), and reinforced carbon plates, can be added. In particular, it is possible to attach original drawings such as paintings and photographs or printed materials to be displayed on the front of the substrate 110, thereby providing an aesthetic sense through artistic aesthetics or visual decoration.

In this way, if you want to attach original drawings such as paintings, photos, etc., or printouts you want to display, to the board 110 as the front sounding board, a flat plate is preferable, and when implementing a diaphragm and speaker with a flat plate, the entire frequency band (low to low) that requires sound output is preferable. It is necessary to provide linear and uniform output volume (high pitch). For example, in existing speakers, it is desirable for the entire area to vibrate with the same amplitude and same phase as possible, so a shallow spherical or conical plate is used as the diaphragm instead of a flat plate.

On the other hand, since the present invention uses a flat diaphragm, it provides a flat plate speaker with uniform sensitivity across the required frequencies.

For this purpose, in the present invention, the substrate 110 as a flat diaphragm is largely divided into 1/3 parts based on area, and the left vibrating part (A, B) and the center (C, 120) are divided into the left and right vibrating parts (A, B) and the center (C, 120). It can be divided into a separation part that separates the output sound of A) and the right vibrating part (B).

At this time, the vibrators 131a and 131b are formed symmetrically in the left vibrating unit A and the right vibrating unit B on the substrate 110, so that stereo sound can be implemented on the substrate 110.

Here, the vibrators 131a and 131b are preferably in the form of electromagnetic vibrators. For example, the vibrators (131a, 131b) are provided with an electromagnet stator and a magnetic vibrator, and when a vibration current is applied to the electromagnet coil of the stator, the vibrator is moved toward the stator and the process of returning to the original position is repeated to generate vibration force. can be used, and in another form, a vibrator form that generates vibration force by vibrating a vibrator of a magnetic material by the magnetic force generated by applying a vibration current to the electromagnet coil of the stator can be used. In addition, the vibrators 131a and 131b may be used in the form of mechanical vibrators using piezoelectric elements in addition to electric vibrators such as electromagnetic vibrators.

In addition, the oscillators 131a and 131b are formed symmetrically left and right on the planar substrate 110 in the form of a single module, and in order to provide uniform stereo sound to the left and right planar substrates 110, the module shape has a circular cross section. desirable.

In addition, in the case of the left and right diaphragms (A, B), high and low sounds can be relatively separated in the left vibrator (A) or right vibrator (B).

That is, a high-pitched sound portion can be formed by forming support plates to support the left and right vibrators (131a and 131b) on the substrate 110 at the portion where the left vibrator (131a) is formed and the portion where the right vibrator (131b) is formed, respectively. For example, the area where the support plate 130a supporting the left oscillator is formed forms the left treble part (A-Hi), and the remaining area of the left diaphragm on the upper and lower sides separated through the left treble part (A-hi) forms the left low sound part ( A-Lo) is formed. Likewise, in the case of the left diaphragm A, it can be divided into a high-pitched region and a low-pitched region through the left support plate 130a having a predetermined thickness and area.

In addition, the right diaphragm B can be divided into a high-pitched region and a low-pitched region through a right support plate 130b having a predetermined thickness and area symmetrically to the left diaphragm A. This is in accordance with the bulk modulus (B) of Equation 1 and Equation 2 described above in order to separate high and low sounds in a flat diaphragm. For example, as the thickness increases, the bulk modulus (B) increases, so the speed of sound in the medium increases and the incidence of high-pitched sounds relatively increases. At this time, based on the same medium length (wavelength), the frequency increases and the high-pitched sound generation rate relatively increases. Accordingly, a left treble portion (A-Hi) and a right treble portion (B-hi) are formed on the left diaphragm A and the right diaphragm B, respectively, and for this purpose, the left support plate 130a has a predetermined thickness than the substrate 110. ) and the right support plate 130b are symmetrically attached (overlaid) on the substrate 110, and the left support plate 130a functions as a support plate for supporting the left vibrator 131a, and the right support plate 130b It functions as a support plate that supports the right vibrator (131b). At this time, it is preferable for the left support plate 130a and the right support plate 130b to have the same symmetrical 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 preferably 0.2 to 1.5 of the substrate thickness. Through this, the high-pitched parts (A-Hi, B-Hi) become thicker than the low-pitched parts (A-Lo, B-lo) by more than 1.2 to 2.5 times in height, and the thickness varies depending on the bulk modulus (B) mentioned above. The thicker it is, the higher the frequency of high-pitched sounds. Accordingly, the left support plate 130a and right support plate 130b areas are high-pitched areas, and the high-pitched sound generation rate is relatively higher than the remaining parts (A-Lo, B-Lo). This allows sound reproduction by dividing the left diaphragm (A) and right diaphragm (B) into high-pitched and low-pitched parts.

In addition, as seen in Equation 1, as the density increases, the bulk modulus (B) increases significantly and the incidence of high-pitched sounds is relatively high, so the cross-sectional areas of each of the left and right support plates (130a, 130b) are divided into each of the left and right diaphragms (A) , B) It is necessary to support each of the left and right vibrators (131a, 131b) by making them at least smaller than the total cross-sectional area so that the high-pitched sound generation rate is higher at the left and right support plates (130a, 130b). In addition, the higher the sound, the lower the movement displacement of the diaphragm, which reduces the cross-sectional area participating in the vibration, causing vibration only near the center of the diaphragm (vibrator forming part). This is also the reason why the left and right support plates 130a and 130b, which support the left and right vibrators, are placed directly below the vibrators.

In this way, the cross-sectional area of each of the left and right support plates (130a, 130b) supporting the left and right oscillators (131a, 131b) is at least smaller than the total cross-sectional area of each of the left and right diaphragms (A, B) to form a high-pitched sound portion. In addition, the remaining left substrate (A-Lo) and right substrate (B-Lo) areas are considered low-pitched areas, and the low-pitched sound generation rate is relatively higher than that near the left and right support plate (130a, 130b) areas.

This means that the left and right support plates (130a, 130b) forming parts produce low and high sounds in all frequency bands by the sum of the output characteristics of the high-pitched sounds (A-Hi, B-Hi) and the remaining low-pitched sounds (A-Lo, B-Lo). Enables the output volume (Amlitude) characteristics to appear linearly and evenly.

Additionally, in order to implement stereo sound, a separation plate 120, C can be formed to separate the left and right support plates 130a and 130b.

The separation plate 120 (C) can be formed in the form of a partition of a certain height to separate left and right output sounds. Accordingly, the separation plate 120 has a thickness of at least the same thickness as the left and right support plates 130a and 130b, and since thin flat plates are generally advantageous for aesthetics and sound reproduction, it is preferable that the maximum thickness does not exceed 1.5 times. .

In this way, the left and right diaphragms can be separated through the separation plate 120 (C) in the center, which serves to divide them into two channels (stereo).

Referring to FIG. 3, the audio signal source 101 provided as a digital audio signal is transmitted through a streaming interface, wired or wirelessly (Bluetooth, AIR-Play, Wi-Fi, etc.), and at this time, the vibrators 131a and 131b ) is formed symmetrically in the left vibrating part (A) and the right vibrating part (B) on the substrate 110, so that stereo sound can be implemented in the substrate 110.

Additionally, when providing stereo sound from the sound source 101 to the board 110 of the planar speaker 100, an audio speaker control unit 102 may be added. Here, the audio speaker control unit 102 includes a first audio speaker control unit 103 and a second audio speaker control unit 104 equipped with an audio power amplifier to implement two channels symmetrically on the left and right sides. It can be composed of:

Through this, the first audio speaker control unit 103 provides the channel 1 (left) signal provided by the sound source 101 to the left vibrator 131a, and the left vibrator 131a is driven by the channel 1 (left) signal. When vibration is generated, the generated mechanical vibration can be 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 3WAY (Bass/Middle/Treble) band and may be configured in the form of three output volume adjustment buttons.

In addition, the second audio speaker control unit 104 also provides the channel 2 (right) signal provided by the sound source 101 to the right vibrator 131b, and the right vibrator 131b is transmitted by the channel 2 (right) signal. When driven 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 3WAY (Bass/Middle/Treble) band and may be configured in the form of three output volume adjustment buttons.

In addition, it is possible to simply adjust the output volume to bass and treble for each 2-way band.

Figure 4 shows a planar speaker 200 according to another preferred embodiment of the present invention, which is (a) a side view, (b) a rear view, and (c) a top view.

Referring to FIG. 4, the 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, and the support structure of the vibrator is not in the form of a stepped support plate but in a non-stepped form. There is a difference in forming a dome-type curved structure in some or all directions. Accordingly, description of the same structure as the planar speaker 100 described in FIGS. 1 to 3 will be omitted and the description will focus on the differences.

As shown in FIG. 4, instead of attaching the stepped support plates 130 and 130b to the front substrate 210, the support plates 240a and 240b are formed in a multi-layer dome or linear dome shape. At this time, the high-pitched parts (A-Hi, B-hi) at the center where the vibrators (231a, 231b) are formed are high, and a curved structure is formed in which the height decreases from the central high-pitched part to the edge part, so that the remaining part except the high-pitched part in the center is a low-pitched part ( It can be formed as A-Lo, B-Lo). The support plates 240a and 240b, which have a full curved structure such as a multi-layer dome or linear dome, form a high-pitched sound at the center vertex of the curve where the vibrator is formed, and form a low-pitched sound as it moves from the central vertex to the lower edge. This makes it possible.

In addition, support plates 240a and 240b of an overall curved structure such as a multi-layer dome or linear dome are formed on the right diaphragm B symmetrically to the left diaphragm A, thereby dividing the diaphragm into a high-pitched region and a low-pitched region. You can. This is in accordance with the bulk modulus (B) of Equation 1 and Equation 2 described above in order to separate high and low sounds in the curved diaphragm. For example, since the height and thickness at the vertex are relatively larger than those at the edge, the bulk modulus (B) increases, the speed of sound in the medium increases, and the incidence of high-pitched sounds relatively increases. At this time, it is preferable for the left curved structure 240a and the right curved structure 240b to be symmetrically formed as volumetric structures with the same thickness and the same cross-sectional area for uniform sound reproduction.

Accordingly, the vertex areas where the left and right oscillators are formed in the left curved structure 240a and the right curved structure 240b function as high-pitched sounds, and the linear curved parts (A-Lo, B-Lo) extending from the vertices to the edges function as low-pitched sounds. I do it. Through this, the left diaphragm (A) and right diaphragm (B) are symmetrically divided into high-pitched and low-pitched parts, allowing stereo sound to be reproduced. In addition, in the curved structure, it is possible to form three or more levels of stepped output sound, such as high, mid, and low, depending on the linear distance from the center of the vertex to the edge.

Additionally, in order to implement stereo sound, a second separation plate 220, C can be formed to separate the left and right curved structures 240a and 240b. At this time, the support plate of the left curved structure 240a or the right curved structure 240b may form a curved support plate on the entire left or right side excluding the area of the second separation plate 220 (C), and may form a curved support plate on the entire left side or part of the left side. It is also possible to form a curved structure support plate only in the area.

As seen above, the left curved structure 240a or the right curved structure 240b may be formed in the form of a support plate that supports the left and right oscillators 231a and 231b on the front board 210, but the curved structure itself is maintained. However, it can also be formed into a packaging structure that covers the left and right vibrators (231a, 231b).

The second separation plate 220 (C) may be formed in the form of a partition of a certain height to separate left and right output sounds. Accordingly, the second separation plate 120 can only be separated if its thickness is at least equal to or greater than the height (thickness) of the vertices of the left and right curved structures 240a and 240b. In addition, since a thin flat plate is generally advantageous for aesthetics and sound reproduction, it is desirable for the maximum thickness not to exceed 1.5 times.

In this way, the left and right diaphragms can be separated through the second separation plate 120 (C) in the center, which serves to divide them into two channels (stereo).

In the above, it was mainly explained that stereo output is possible with two-channel separate output through separation of the left and right substrates through a separator plate. However, if a separator is not formed, the high and low sounds can be separated by a single plate at the center and edge of the flat substrate. Make it possible.

That is, one planar substrate, a vibrator and a support plate of a predetermined thickness supporting the vibrator are formed at the center of the planar substrate, the area of the substrate where the support plate is formed forms a high-pitched region, and the remaining area of the substrate excluding the area where the support plate is formed is formed. The region may form a bass region. Through this, it is possible to distinguish between high and low sounds with a single plate and a single vibrator.

The embodiments of the present invention described above have been disclosed for illustrative purposes, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications , changes and additions should be regarded as falling within the scope of this patent claim.

100, 200: Speaker
110, 210: substrate
120, 220: Separator plate
130a, 130b; treble
131a, 131b, 231a, 231b: Oscillator
132a, 132b: bass part
240a, 240b: curved structure

Claims (10)

One planar substrate,
Forming a vibrator and a support plate of a predetermined thickness to support the vibrator at the center of the planar substrate,
The substrate area where the support plate is formed forms a high-pitched region, and the remaining substrate regions excluding the region where the support plate is formed form a low-pitched region,
A planar speaker, characterized in that the high-pitched part and the low-pitched part form a curved structure linearly extending from the center of the vertex to the edge part. One planar substrate,
Forming a separator plate of a predetermined thickness at the center of the planar substrate, forming a first vibrator on one side symmetrically with the separator plate in between, and forming a second vibrator on the other side,
The first oscillator and the second oscillator are formed at the center of one substrate and the center of the other substrate, respectively, separated by the separation plate, and a first support plate of a predetermined thickness supports the first oscillator and supports the second oscillator. Forming a second support plate of a predetermined thickness,
One substrate area where the first support plate is formed and the other substrate area where the second support plate is formed form one treble part and the other treble part, respectively, and one side excluding the area where the first support plate is formed and the area where the second support plate is formed, and The other substrate area forms a low-pitched region,
A planar speaker, characterized in that the one side high-pitched sound part to the one side low-pitched sound part or the other high-pitched sound part to the other low-pitched sound part forms a curved structure that extends linearly from the center of the vertex to the edge part. One planar substrate,
Forming a separator plate of a predetermined thickness at the center of the planar substrate, forming a first vibrator on one side symmetrically with the separator plate in between, and forming a second vibrator on the other side,
The first oscillator and the second oscillator are formed at the center of one substrate and the center of the other substrate, respectively, separated by the separation plate, and a first support plate of a predetermined thickness supports the first oscillator and supports the second oscillator. Forming a second support plate of a predetermined thickness,
One substrate area where the first support plate is formed and the other substrate area where the second support plate is formed form one treble part and the other treble part, respectively, and one side excluding the area where the first support plate is formed and the area where the second support plate is formed, and The other substrate area forms a low-pitched region,
A planar speaker, characterized in that the thickness of the separation plate is equal to or greater than the thickness of the first support plate and the second support plate. According to any one of claims 1 to 3,
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. According to any one of claims 1 to 3,
A flat speaker, characterized in that it is possible to attach an original drawing, such as a picture or a photograph, or a set printed matter to the front of the flat substrate. According to any one of claims 1 to 3,
A planar speaker, wherein the vibrator, the first vibrator, or the second vibrator is an electric vibrator or a mechanical vibrator. According to any one of claims 1 to 3,
A flat speaker that forms a wired or wireless sound source streaming interface. In clause 7,
A flat speaker in the sound source streaming interface, further comprising an audio speaker control unit capable of adjusting the output volume for each 3WAY (Bass/Middle/Treble) or 2WAY (Bass/Treble) band. delete delete