JP6842394B2 - Speaker system, display device, television device - Google Patents

Description

The present invention relates to a speaker system, a display device, and a television device, and more specifically, a first speaker unit and a second speaker unit provided on the side of the display device and having sound emitting surfaces facing each other in the vertical direction of the display device. The present invention relates to a speaker system equipped with a speaker unit, a display device, and a television device.

It is known that the speaker system has a structure in which two speaker units are arranged side by side and each sound emitting surface faces the front side of the display device. In the case of this structure, the optimum sound field is limited to the positions where the distances from each sound emitting surface are equal. Therefore, for example, Patent Document 1 discloses a structure in which the sound emitting surfaces are arranged so as to face each other in the vertical direction of the display device.

International Publication No. 2017/002876

By the way, in the structure described in Patent Document 1, each speaker unit facing vertically is connected by a connecting member.
However, when the sound from each speaker unit is reflected by the connecting member, the direct sound output from the speaker unit and the reflected sound reflected by the connecting member may interfere with each other, resulting in a strange sound. In this case, arranging the sound absorbing material on the connecting member to suppress the reflected sound is troublesome because the sound absorbing material is required separately and the work of attaching the sound absorbing material is also required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a speaker system, a display device, and a television device that reduce interference between direct sound and reflected sound and prevent deterioration of audio quality. And.

In order to solve the above problems, the first technical means of the present invention is provided on the side of the display device, and the first speaker unit and the second speaker whose sound emitting surfaces face each other in the vertical direction of the display device. In a speaker system including a unit, a connecting member for connecting the first speaker unit and the second speaker unit is provided on the back side of the display device, and the connecting member penetrates the connecting member. It is characterized by having a plurality of holes.

In the second technical means, in the first technical means, the opening area of the hole at the intermediate position between the first speaker unit and the second speaker unit is a position near the first speaker unit or the second. It is characterized in that it is formed larger than the opening area of the hole in the vicinity of the speaker unit of the above.

The third technical means is characterized in that the holes have a honeycomb shape in the first or second technical means.

The fourth technical means is characterized by being a display device including the speaker system of any one of the first to third and a display panel.

The fifth technical means is characterized in that it is a television device provided with the fourth technical means.

According to the present invention, the sound from each speaker unit passes through the hole of the connecting member and is less likely to be reflected by the connecting member, so that a strange sound is less likely to be generated as compared with the conventional case. Therefore, it is possible to prevent deterioration of voice quality.

It is a perspective view of the display device of this invention. It is an exploded perspective view of a display device. It is a figure for demonstrating the speaker system by 1st Embodiment. It is a figure for demonstrating the measurement result of a sound pressure level. It is a figure for demonstrating the measurement result of a sound pressure level. It is a figure for demonstrating the speaker system by 3rd Embodiment.

Hereinafter, preferred embodiments of the speaker system, display device, and television device of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view of the display device of the present invention. The display device 1 (for example, a thin television device) has a panel module 3, speaker systems 7L, 7R, and a rear housing 6. The panel module 3 corresponds to the display panel of the present invention.

The speaker system 7L is installed on the left side of the panel module 3 when viewed from the front of the display device 1, and the speaker system 7R is installed on the right side of the panel module 3. The speaker systems 7L and 7R are formed so as to be flush with the panel module 3 on the front side of the display device 1, and flush with the rear housing 6 on the rear side of the display device 1, for example. ing. From each of the speaker systems 7L and 7R, audio within the audible band (for example, about 20 Hz to 20 kHz) can be output.

(First Embodiment)
FIG. 2 is an exploded perspective view of the display device. The panel module 3 includes, for example, a rectangular LCD (Liquid Crystal Display) panel 4 having a liquid crystal layer, a glass substrate, or the like, and although not shown thereof, for example, a protective glass, a polarizing plate, a diffuser plate, a backlight, or the like. have. A circuit board 5 for driving the display device 1 is provided behind the LCD panel 4.

The panel module 3 and the speaker systems 7L and 7R are held by, for example, resin frames 2a and 2b. The frame body 2a extends in the horizontal direction and is attached to the upper surface of the panel module 3, and further covers the upper ends of the speaker systems 7L and 7R. The frame body 2b extends in the horizontal direction like the frame body 2a, but holds the light display unit 2c in the center and is attached to the lower surface of the panel module 3, and further, the lower ends of the speaker systems 7L and 7R. Is covering.

It is also possible to attach the panel module 3 to the rear housing 6 using a middle cabinet (not shown). In this case, the frame bodies 2a and 2b hold the middle cabinet as well as the panel module 3.
Each speaker system 7L, 7R has two speaker devices (first speaker device 10, second speaker device 20), respectively.

As will be described later, the first speaker device 10 and the second speaker device 20 are arranged so that their sound emitting surfaces face each other, are connected to the same amplifier (not shown), and output the same sound. The first speaker device 10 and the second speaker device 20 are covered with the rear cover 8, and are covered with the speaker net 9 from the front side of the display device 1.
Since the speaker system 7L and the speaker system 7R have the same structure, the speaker system 7R will be described in detail below, and the description of the speaker system 7L will be omitted.

FIG. 3A is a front view of the speaker system 7R, which is located on the front side of the first and second enclosures 11 and 21 described in FIG. 3 from the first and second speaker devices 10 and 20 described in FIG. The cover 10a and 20a (shown in FIG. 2) covering the first speaker unit 12, the resonance tube 13, the second speaker unit 22, and the resonance tube 23 are removed. FIG. 3B is an enlarged view of FIG. 3A.
The first speaker device 10 has a first enclosure 11 that is formed in a substantially cylindrical shape and extends in the vertical direction. As shown in FIG. 3A, the first enclosure 11 houses the first speaker unit 12 and the resonance tube 13. The first speaker unit 12 is, for example, a speaker (mid-bass speaker) for mid-low range output, and is installed at the lower end of the first enclosure 11.

The first speaker unit 12 has a magnetic circuit unit 12b in which a voice coil (not shown) or the like is arranged, and a diaphragm is provided at the lower end of the magnetic circuit unit 12b to form a sound emitting surface 12a facing downward. Has been done.
On the other hand, the second speaker device 20 has a second enclosure 21 that is formed in a substantially cylindrical shape and extends in the vertical direction. The second speaker unit 22 and the resonance tube 23 are housed in the second enclosure 21. The second speaker unit 22 is, for example, a mid-bus speaker, and is installed at the upper end of the second enclosure 21.

The second speaker unit 22 has a magnetic circuit unit 22b in which a voice coil (not shown) or the like is arranged, and a diaphragm is provided at the upper end of the magnetic circuit unit 22b to form an upward sound emitting surface 22a. Has been done.
As described above, the sound emitting surface 12a of the first speaker unit 12 and the sound emitting surface 22a of the second speaker unit 22 face each other in the vertical direction of the display device 1.

Although the first and second speaker units 12 and 22 have given examples of mid-bus speakers, other types of speakers such as tweeters and scoucers, mid-high speakers, and the like may be used.
A connecting member 30 is provided between the first enclosure 11 and the second enclosure 21. Specifically, the connecting member 30 is formed, for example, in a semi-cylindrical cross section with the front side of the display device 1 open, and the lower end of the first enclosure 11 and the second enclosure 21 on the back side of the display device 1. The upper ends are connected.

As shown in FIG. 3B, the connecting member 30 is provided with a plurality of holes 35. Specifically, the holes 35 are formed in a honeycomb shape, for example, and penetrate the front surface and the back surface of the connecting member 30. Further, the holes 35 are formed with the same opening area except for the holes formed at the ends of the connecting member 30, and are provided at substantially equal intervals. If the holes are made into a honeycomb shape, the holes can be provided while ensuring the strength of the connecting member 30.
Further, the shape of the hole is not limited to the honeycomb shape, and may be a round shape, an elliptical shape, a quadrangular shape, or the like.

Next, the sound pressure characteristics were measured using a microphone in the case where only the speaker system 7R was driven with respect to the connecting member 30 (first embodiment) having the above-mentioned hole 35 and the following Comparative Example 1.
The microphone is located around the speaker system 7R, specifically, the front side (front side) of the connecting member 30, the right front side (outside 45 °) of the connecting member 30 and the right side (outside 90) of the connecting member 30 when viewed from the front side of the display device 1. °), left front of the connecting member 30 (inside 45 °), and left of the connecting member 30 (inside 90 °). The distance from the speaker system 7R to the microphone is 1 m. Since the sound pressure characteristics when only the speaker system 7L is driven are basically the same as those when only the speaker system 7R is driven, the case where only the speaker system 7L is driven is omitted.

FIG. 4 is a diagram for explaining the measurement result of the sound pressure level with respect to Comparative Example 1.
First, in Comparative Example 1, no hole is formed in the connecting member 30. In this case, the measurement result of the front side (front side) of the connecting member 30 is shown by a solid line in FIG. 4, the right front side (outside 45 °) of the connecting member 30 is shown by a broken line, and the right side (outside 90 °) of the connecting member 30 is shown by a dotted line. The left front side (inside 45 °) of the connecting member 30 is indicated by a alternate long and short dash line, and the left side (inside 90 °) of the connecting member 30 is indicated by a two-dot chain line.

For example, in the band around 4 kHz, the sound pressure level was 85 dB SPL in front (front) of the connecting member 30 shown by the solid line in FIG. 4, whereas the sound pressure level was 85 dB SPL, whereas the right side of the connecting member 30 shown by the dotted line ( At 90 ° outside), the sound pressure level was 77 dB SPL. That is, when the hole was not formed in the connecting member 30, the sound pressure level at 90 ° on the outside was 8 dB smaller than the sound pressure level on the front surface, and the difference depending on the measurement position was large.

FIG. 5 is a diagram for explaining the measurement result of the sound pressure level with respect to the first embodiment.
When the connecting member 30 having a hole 35 as in the first embodiment is used, as in Comparative Example 1, the band around 4 kHz is described in the front (front) of the connecting member 30 shown by the solid line in FIG. While the sound pressure level was 84 dB SPL, the sound pressure level was 81 dB SPL on the right side (outside 90 °) of the connecting member 30 shown by the dotted line. That is, when a hole is formed in the connecting member 30, the sound pressure level at 90 ° on the outside is only 3 dB lower than the sound pressure level on the front, and the difference depending on the measurement position is smaller than that in Comparative Example 1. You can see that.

Further, in the case of Comparative Example 1 described in FIG. 4, the peak value of the sound pressure level appears in the vicinity of 2 kHz or 4 kHz, but in the case of the first embodiment described in FIG. 5, the sound pressure level appears. The peak value of is appearing only around 4 kHz. This is because the sound from the first and second speaker units 12 and 22 passes through the hole 35 of the connecting member 30, and is less likely to be reflected by the connecting member 35, so that the sound pressure level becomes flatter with respect to the frequency change. It is probable that it was obtained and it became difficult to generate a strange sound. This point also prevents deterioration of voice quality as compared with Comparative Example 1.

(Second Embodiment)
In the first embodiment, the example of the connecting member 30 in which the holes 35 having the same opening area are uniformly provided has been described. However, the present invention is not limited to this example. For example, the size of the opening area may be changed according to the distance from the speaker unit.
Specifically, although not shown, the opening area of the hole at the intermediate position between the first speaker unit 12 and the second speaker unit 22 is the position near the first speaker unit 12 (or the second speaker unit 22). It may be formed larger than the opening area of the hole at the nearby position). The sound pressure increases at the intermediate position between the first speaker unit 12 and the second speaker unit 22, but since the opening area of the hole at the intermediate position is increased, the sound can easily escape to the back side of the display device, which makes the sound uncomfortable. A certain sound can be reduced.

(Third Embodiment)
FIG. 6 is a diagram for explaining the speaker system according to the third embodiment, and a diffuser (also referred to as an acoustic diffuser) 31 may be provided on the connecting member 30.
The diffuser 31 has a function of reflecting the sound from the first and second speaker units 12 and 22 toward the front side of the display device 1, for example, the sound emitting surfaces 12a and the second of the first speaker unit 12. It is installed at an intermediate position with the sound emitting surface 22a of the speaker unit 22.

The diffuser 31 is fixed to the connecting member 30 via a shaft portion (not shown), and no hole is provided in the connecting member where the shaft portion is held.
The diffuser 31 has a convex curved surface toward the sound emitting surface 12a of the first speaker unit 12, and has a convex curved surface toward the sound emitting surface 22a of the second speaker unit 22. As a result, the sound from the first and second speaker units 12 and 22 can be easily spread evenly in the vertical direction and the horizontal direction as well as in front of the display device 1. Therefore, it is possible to further prevent deterioration of voice quality.

1 ... Display device, 2a, 2b ... Frame body, 2c ... Optical display unit, 3 ... Panel module, 4 ... LCD panel, 5 ... Circuit board, 6 ... Rear enclosure, 7L, 7R ... Speaker system, 8 ... Rear cover, 9 ... Speaker net, 10 ... 1st speaker device, 10a, 20a ... Cover, 11 ... 1st enclosure, 12 ... 1st speaker unit, 12a, 22a ... Sound emitting surface, 12b, 22b ... Magnetic circuit section, 13, 23 ... resonance tube, 20 ... second speaker device, 21 ... second enclosure, 22 ... second speaker unit, 30 ... connecting member, 31 ... diffuser, 35 ... hole.

Claims (5)

A speaker system provided on the side of a display device and provided with a first speaker unit and a second speaker unit whose sound emitting surfaces face each other in the vertical direction of the display device.
A connecting member for connecting the first speaker unit and the second speaker unit is provided on the back side of the display device.
A speaker system in which the connecting member has a plurality of holes penetrating the connecting member. The speaker system according to claim 1.
The opening area of the hole at an intermediate position between the first speaker unit and the second speaker unit is larger than the opening area of the hole at a position near the first speaker unit or a position near the second speaker unit. A speaker system characterized by being formed large. The speaker system according to claim 1 or 2.
A speaker system characterized in that the holes have a honeycomb shape. A display device including the speaker system according to any one of claims 1 to 3 and a display panel. A television device including the display device according to claim 4.

Images