JP7301726B2 - display speaker - Google Patents

Description

The present invention relates to display speakers.

In recent years, display panels made up of liquid crystals, OLEDs, etc., have been manufactured to be thinner, and their applications are not limited to televisions and PC monitors, but are also widely used in tablet and smartphone screens. It's being used. TVs and monitors are becoming larger screens, and there is a strong demand for thinner and smaller speakers to be installed.In addition, smartphones and tablets are equipped with speakers in a simple and compact device configuration. There is an increasing demand for
For example, in OLED televisions, an actuator that applies the structure of an electrodynamic speaker is installed on the back surface of a display panel to vibrate the panel itself to reproduce sound. However, the current situation is that this actuator is dozens of times thicker than the OLED panel.

In response to such a situation, Patent Document 1 discloses an electroacoustic conversion film that can be used by being provided on the back surface of a display. This document describes an electro-acoustic conversion film designed to stably reproduce human voices and sounds of musical instruments by examining the structure of the film, the selection of the types of materials used, and the characteristics of their combinations. It is

WO2013/047875

As with the electroacoustic conversion film described above, in the technical field of producing sound by attaching thin film transducers to devices, the technical issue is whether sound in the bass range can be output with sufficient strength. considered to be one. The electroacoustic conversion film described in Patent Document 1 is implemented even if good characteristics are obtained in an experimental environment by selecting the structure of the film and the materials used, and examining the characteristics by combining them. Depending on the condition of the equipment, there is a possibility that its characteristics cannot be fully exhibited. In other words, since various cases are conceivable for the configuration and structure of the display to be vibrated, there is a risk that the output characteristics cannot be reproduced in the same way as in the experimental stage. Thus, there are a number of considerations in implementing this electroacoustic conversion film, and it may be difficult to obtain the desired properties through simple trials.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display speaker capable of sufficiently outputting even a low frequency range with a simple configuration.

In order to solve the above problems, the present invention employs the following means.
That is, the display speaker of the present invention includes a display panel, a vibrator, and one or more vibrating weights, the vibrator being surface-bonded to the display panel, and the vibrating weight being attached to the vibrator. combined.
According to such an invention, since the vibrator is surface-bonded to the display panel and the vibrating weight is coupled to the vibrator, it is possible to realize a display speaker capable of sufficiently outputting even low frequencies.

Further, the display speaker of the present invention includes a display panel, a vibrator, one joint member, and one or more vibration weights, and the vibrator is connected to one of the vibrators via the joint member. A portion is bonded to the display panel, and the vibrating weight is coupled to the vibrator.
According to such an invention, a part of the vibrator is joined to the display panel through the bonding member, and the vibrating weight is coupled to the vibrator. realizable.

In one aspect of the present invention, in the front display speaker, the vibrator is joined to the display panel in the vicinity of the center of the vibrator via the joining member, and the vibration weight is the vibrator in the vicinity of the periphery of the vibrator. coupled to
According to such a configuration, since the vicinity of the center of the oscillator is joined to the display panel through the joining member, and the vibrating weight is coupled to the vicinity of the periphery of the oscillator, the output of the oscillator is transferred to the display panel. You can communicate effectively.

A display speaker according to the present invention comprises a display panel, a vibrator, a pressing support structure positioned away from the back surface of the display panel, and one or more pressing members, wherein the vibrator is attached to the display panel. Face-bonded, the pressing member is coupled between the pressing support structure and the vibrator.
According to this aspect of the invention, the vibrator is surface-bonded to the display panel, and the pressing member is coupled between the pressing support structure and the vibrator, so that a display speaker capable of sufficiently outputting low frequencies can be realized. .

Further, a display speaker of the present invention comprises a display panel, a vibrator, one joining member, a pressing support structure positioned apart from the back surface of the display panel, and one or more pressing members, A part of the vibrator is bonded to the display panel via the bonding member, and the pressing member is coupled between the pressing support structure and the vibrator.
According to such an invention, the vibrator is partly joined to the display panel via the bonding member, and the pressing member is coupled between the pressing support structure and the vibrator, so that the bass range is sufficiently low. A display speaker capable of outputting to

In one aspect of the present invention, in the front display speaker, the vibrator is joined to the display panel in the vicinity of the center of the vibrator via the joining member, and the pressing member is the vibrator in the vicinity of the periphery of the vibrator. coupled to
According to such a configuration, since the vicinity of the center of the oscillator is joined to the display panel through the joining member, and the pressing member is coupled to the vicinity of the periphery of the oscillator, the output of the oscillator is transferred to the display panel. You can communicate effectively.

In one aspect of the invention, the display panel is an OLED (organic LED) panel.
With such a configuration, the present invention can be effectively realized.

ADVANTAGE OF THE INVENTION According to this invention, the display speaker which can fully output even a low-pitched sound by a simple structure can be provided.

FIG. 2 is a plan cross-sectional view of the essential parts of the display speaker according to the embodiment of the present invention; 5 is a graph for explaining the effect of the display speaker according to the embodiment of the present invention; 1 is a schematic diagram showing the overall configuration of a display speaker according to an embodiment of the present invention; FIG. FIG. 2 is a plan cross-sectional view of the essential parts of the display speaker according to the embodiment of the present invention; FIG. 2 is a plan cross-sectional view of the essential parts of the display speaker according to the embodiment of the present invention; FIG. 2 is a plan cross-sectional view of the essential parts of the display speaker according to the embodiment of the present invention; FIG. 2 is a plan cross-sectional view of the essential parts of the display speaker according to the embodiment of the present invention; FIG. 2 is a plan cross-sectional view of the essential parts of the display speaker according to the embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 shows a plan cross-sectional view of a main part of a display speaker according to a first embodiment of the present invention.
A display speaker 1 according to this embodiment includes a display panel 2 , a vibrator 3 , and a vibration weight 4 . The oscillator 3 is surface-bonded to the rear surface 21 of the display panel 2 , and the oscillator weight 4 is coupled to the rear surface 31 of the oscillator 3 .

FIG. 1 shows an enlarged cross-sectional view of a portion of the display panel 2 where the vibrator 3 is surface-bonded. The vibrator 3 is an element that converts an electric signal into physical vibration, and a piezo element is employed in this embodiment. A piezo element is an element that uses the piezoelectric effect to change its shape when an electric field is applied. When an electric signal is applied to the vibrator 3, the vibrator 3 undergoes physical vibration according to the signal waveform, that is, mainly changes in thickness. Here, the electric signal is a signal for causing the vibrator 3 to generate sounds within the human audible range, including natural voice, musical instruments, and environmental sounds. intended to be played.

A physical vibration generated in the vibrator 3 by application of an electric signal is transmitted to the display panel 2 to which the vibrator 3 is surface-bonded to the rear surface thereof, thereby causing the display panel 2 itself to vibrate. That is, the entire display panel 2 also functions as a vibrating surface such as cone paper of a conventional speaker. At this time, since the vibrating weight 4 is coupled to the back surface of the vibrator 3 , with this configuration, the vibrator 3 receives a reaction force from the heavy vibrating weight 4 , and the vibration from the vibrator 3 to the display panel 2 . It is possible to obtain the effect of efficiently transmitting the physical vibration that is transmitted to and making it possible to output sounds in the low range, which could not be output conventionally.

FIG. 2 is a graph 5 of experimental data for explaining the above effects. In this experiment, first, a microphone for evaluation was installed at a position distant from the display speaker 1 (not shown). Next, by applying an electric signal to the vibrator 3, the display speaker 1 is caused to output a sound of a predetermined frequency with a constant amplitude, and a microphone placed at a position distant from the display speaker 1 emits sound from the display speaker 1. It records the magnitude of the electrical signal produced by the microphone when it receives a sound. In the graph 5 of FIG. 2, the data of this experiment represent the frequency of the sound output from the display speaker 1 on the horizontal axis 51 and the output of the microphone on the vertical axis 52 .

In graph 5, data 53, 54, and 55 of three types of display speakers 1 are plotted. 1 and the output data 55 of the display speaker 1 coupled with the oscillating weight 4 which is heavier than the data 54 .

As can be seen from the graph 5, the data 53 of the display speaker 1 without the vibrating weight 4 does not produce an output in a frequency band lower than 500 Hz (56). Also, regarding the output of the frequency 500 Hz (56), the output of the data 53 is about 10, while the data 54 and 55 of the display speaker 1 coupled with the vibration weight 4 has an output of 50 or more. . In data 54 and 55, an output is obtained even at an even lower frequency of 200 Hz (57), and from the above results, the sound output of the display speaker 1 is clearly increased by coupling the vibration weight 4. It can be seen that it can be improved as follows.

FIG. 3 is a schematic diagram showing the overall configuration of such a display speaker 1. As shown in FIG. Here, in the display speaker 1, vibrators 32, 33, and 34 having a vibrating weight 4 are surface-bonded at three locations on the display panel 2 as a whole. As input electrical signals to the display speaker 1, a stereo L signal (left sound source) 61 and R signal (right sound source) 62 are input. Each of the L signal 61 and the R signal 62 is separated into two inputs for filtering with a high-pass filter (HPF) and a low-pass filter (LPF).

Here, the signal 63 of the L signal 61 passed through the high-pass filter (HPF) is applied to the transducer 32 arranged on the left side of the display panel 2, and the signal of the R signal 62 passed through the high-pass filter (HPF) 64 is applied to the vibrator 34 arranged on the right side of the display panel 2 . A signal 65 passed through the low-pass filter (LPF) of the L signal 61 and a signal 66 passed through the low-pass filter (LPF) of the R signal 62 are mixed in a mixer 67 and the output 68 is sent to the center of the display panel 2. It is applied to the arranged vibrator 33 . With such a configuration, the vibration of the vibrators 32 and 34 realizes left and right stereo sound, and the vibrator 33 provided in the center of the display panel outputs a low frequency sound to realize the action of a low frequency speaker woofer.

As described above, in the present embodiment, the vibrator 3 is surface-bonded to the display panel 2 and the vibrating weight 4 is coupled to the vibrator 3. Physical vibration can be efficiently transmitted to the display panel 2 . That is, with a simple structure in which the vibrating weight 4 is coupled to the vibrator 3, the function of the display panel 2 as a vibrating plate can be effectively used, and a display speaker capable of sufficiently outputting even the low frequency range can be realized.

In the present embodiment, the vibrators 3 are provided at three positions within the plane of the display panel 2, but this is not a limitation, and any number of vibrators may be provided within the plane of the display panel 2 in consideration of the output characteristics. At that time, filtering of the sound band applied to each transducer 3 and gain adjustment (not shown) may be arbitrarily configured.

(Second embodiment)
FIG. 4 shows a plan cross-sectional view of a main part of a display speaker according to a second embodiment of the present invention.
A display speaker 10 according to this embodiment includes a display panel 2 , a vibrator 3 , and a plurality of vibrating weights 4 . The difference of this embodiment from the first embodiment is that not one vibration weight 4 but a plurality of vibration weights 4 are coupled to the rear surface 31 of the vibrator 3 . In this embodiment, the vibration weight 4 having the optimum weight can be coupled at the optimum position while considering the characteristics of the display speaker 10 . For example, in the central portion of the vibrator 3 where the vibration force is strong, a heavy vibration weight 4 is coupled to increase the reaction force, and in the peripheral portion where the vibration force weakens, a vibration weight 4 that is lighter than the center is coupled. is possible. Therefore, in addition to the functions and effects of the first embodiment, it is possible to finely adjust the characteristics of the display speaker 10 by the vibrating weight 4 .

(Third Embodiment)
FIG. 5 shows a plan cross-sectional view of a main part of a display speaker according to a third embodiment of the invention.
A display speaker 11 according to this embodiment includes a display panel 2 , a vibrator 3 , a joint member 6 , and a vibration weight 4 . A part of the vibrator 3 is joined to the display panel 2 via a joint member 6, and the vibrating weight 4 is coupled to the vibrator. As shown in FIG. 5, in this embodiment, the vibrator 3 is joined to the display panel 2 in the vicinity of the center of the vibrator 3 via the joining member 6, and the vibrating weight 4 is coupled to the vibrator 3 in the vicinity of the periphery. It is As the vibrator 3 according to the present embodiment, a thin plate having a rectangular planar shape and warping mainly along the longitudinal direction of the rectangular shape with the application of an electric signal is applied.

In this embodiment, the vibrator 3 is partially joined to the display panel 2 in the vicinity of its center through the joint member 6, and the vibrating weight 4 is coupled to the vibrator 3 in the vicinity of its longitudinal end. In addition to the functions and effects of the first embodiment, the vibration of the vibrator 3 can be transmitted to the display panel 2 more efficiently.

(Fourth embodiment)
FIG. 6 shows a plan cross-sectional view of a main part of a display speaker according to a fourth embodiment of the invention.
The display speaker 12 according to this embodiment includes a display panel 2, a vibrator 3, a pressing support structure 71 positioned apart from the back surface of the display panel 2, and a pressing member 72. The vibrator 3 is The display panel 2 is surface-bonded, and the pressing member 72 is coupled between the pressing support structure 71 and the vibrator 3 . The vibrator 3 according to this embodiment, like the vibrator 3 according to the first and second embodiments, mainly changes in thickness in accordance with the application of an electrical signal.

The pressing support structure 71 and the pressing member 72 constitute the pressing mechanism 7 . The pressing support structure 71 is formed of a rigid surface provided at a distance from the back surface of the display panel 2, and the pressing member 72 is formed of an elastic member. In this embodiment, the pressing mechanism 7 applies a force to press the vibrator 3 against the display panel 2, so that the same effect as the vibrating weight 4 of the first embodiment can be obtained. Since the pressing mechanism 7 is employed in this way, in this embodiment, in addition to the effects and effects of the first embodiment, it is not necessary to use the weight of the vibration weight 4 of the first embodiment. can be made lighter.
In the present embodiment, the pressing support structure 71 is formed of a rigid surface, but is not limited to this, and any structure that can apply a pressing force to the vibrator 3 by the pressing member 72 may be used. For example, it may be configured with a grid-like frame.

(Fifth embodiment)
FIG. 7 shows an enlarged sectional view of a display speaker according to a fifth embodiment of the invention.
The display speaker 13 according to the present embodiment includes a display panel 2, a vibrator 3, a pressing support structure 71 positioned apart from the back surface of the display panel 2, and a pressing member 72. The vibrator 3 is The display panel 2 is surface-bonded, and the pressing member 72 is coupled between the pressing support structure 71 and the vibrator 3 .

The pressing support structure 71 and the pressing member 72 constitute the pressing mechanism 7 . This embodiment differs from the fourth embodiment in that not one pressing member 72 but a plurality of pressing members 72 are coupled between the pressing support structure 71 and the vibrator 3. is. In the present embodiment, the pressing members 72 having the optimal elastic force can be combined at the optimal position while considering the characteristics of the display speaker 13 for the plurality of pressing members 72 . For example, in the central portion of the vibrator 3 where the vibration force is strong, a pressing member 722 with high elastic force is coupled to increase the pressing force, and in the peripheral portion where the vibration force weakens, a pressing member 721 with weaker elastic force than the center. It is possible to make adjustments such as combining Therefore, in addition to the functions and effects of the fourth embodiment, it is possible to finely adjust the characteristics of the display speaker 13 by the pressing member 72 .

(Sixth embodiment)
FIG. 8 shows a plan cross-sectional view of a main part of a display speaker according to a sixth embodiment of the present invention.
The display speaker 14 according to this embodiment includes the display panel 2 , the vibrator 3 , the joint member 6 , the pressing support structure 71 positioned apart from the back surface of the display panel 2 , and the pressing member 72 . A part of the vibrator 3 is bonded to the display panel 2 via the bonding member 6 , and the pressing member 72 is coupled between the pressing support structure 71 and the vibrator 3 . Like the vibrator 3 according to the third embodiment, the vibrator 3 according to the present embodiment is a thin plate having a rectangular planar shape, and warps mainly along the longitudinal direction of the rectangular shape when an electric signal is applied. is what occurs. As shown in FIG. 8, in this embodiment, the vibrator 3 is joined to the display panel 2 in the vicinity of the center of the vibrator 3 via the bonding member 6, and the pressing member 72 is coupled to the vibrator 3 in the vicinity of the periphery. It is The pressing support structure 71 and the pressing support member 72 constitute the pressing mechanism 7 and apply a pressing force to press the vibrator 3 against the display panel 2 via the joining member 6 .

In this embodiment, the vibrator 3 is partially joined to the display panel 2 in the vicinity of its center via the joint member 6, and the pressing member 72 is coupled to the vibrator 3 in the vicinity of its longitudinal end. In addition to the functions and effects of the fourth embodiment, the vibration of the vibrator 3 can be transmitted to the display panel 2 more efficiently.

In the above-described embodiments, a piezoelectric element is used as a vibrator, but the invention is not limited to this, and any element can be used in the present invention as long as it can vibrate the display panel. For example, the present invention can be implemented using a dielectric elastomer, an electroresponsive polymer gel, an ion conductive polymer gel, or the like.
A liquid crystal panel, an OLED (organic LED) panel, or the like can be used as the display panel.

1, 10, 11, 12, 13, 14 display speaker 2 display panel 3 vibrator 4 vibration weight 6 joining member 71 pressing support structure 72, 721, 722 pressing member

Claims (5)

a display panel;
an oscillator;
a plurality of oscillating weights;
The vibrator is surface-bonded to the display panel,
The display speaker, wherein the vibrating weight is coupled to the vibrator, and the vibrating weight coupled near the center of the vibrator is set heavier than the vibrating weight coupled near the periphery of the vibrator. a display panel;
an oscillator;
a joining member;
one or more oscillating weights;
part of the vibrator is bonded to the display panel via the bonding member;
The display speaker, wherein the vibration weight is coupled to a surface of the vibrator opposite to the surface to which the display panel is bonded . the vibrator is bonded to the display panel in the vicinity of the center of the vibrator via the bonding member;
3. The display speaker of claim 2, wherein the vibrating weight is coupled near the periphery of the vibrator. a display panel;
an oscillator;
a pressing support structure positioned away from the back surface of the display panel;
a plurality of pressing members,
The vibrator is surface-bonded to the display panel,
The pressing member is coupled between the pressing support structure and the vibrator, and the pressing member coupled near the center of the vibrator is located closer to the vibrator than the pressing member coupled near the periphery of the vibrator. A display speaker with strong elasticity . The display speaker according to any one of claims 1 to 4 , wherein the display panel is an OLED (organic LED) panel.

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