JP2018042023A - Display device and television set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device and a television set capable of reproducing a wide sound field in a vertical direction of a display part.SOLUTION: A display device 1 is the device where speaker devices of thin and long structures are arranged in the circumference of a display part. The speaker devices 15 include: side speaker parts 15R and 15L positioned on the right and left sides of the display part 10; and top speaker parts 16L and 16R positioned on the upper side of the display part. The side speaker parts are arranged to allow short axes of the side speaker parts to extend in a horizontal direction of the display part and also arranged to face a front surface of the display part. The top speaker parts are arranged to allow short axes of the top speaker parts to extend in a vertical direction of the display part and also arranged to face a front surface of the display part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display device and a television device, and more particularly, to a display device and a television device in which an elongated speaker device is arranged around a display unit.

  In the display device, if the speaker devices are installed on both the left and right sides of the display unit, there is a concern that the width of the display device increases. For this reason, in thin display devices, a round speaker device is mounted downward (also referred to as a hidden speaker structure), an elongated sound guide structure is provided in front of the speaker device, or a speaker device having an elongated structure is used. It has been known. For example, Patent Document 1 discloses a structure in which elongated speaker devices are installed on the left and right sides of a display unit.

JP 2008-167268 A

  However, in the case of the above-mentioned speaker device with a hidden structure, since sound is output downward and is reflected on, for example, a TV stand and reaches the viewer, there is a concern that the sound quality deteriorates and it is difficult to reproduce a sound field with a sense of spread. is there. In addition, even when the above-described long and narrow sound guiding structure is provided, the sound outlet is narrowed, so that the sound quality is deteriorated and it is difficult to reproduce a sound field having a sense of spread.

  In addition, as in Patent Document 1, when the speaker devices having an elongated structure are installed on both the left and right sides of the display unit, they are arranged vertically so that a wide sound field can be reproduced in the left and right direction of the display unit. There is a problem that a wide sound field cannot be reproduced in the vertical direction of the display unit.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device and a television device that can reproduce a wide sound field with respect to the vertical direction of the display unit.

  In order to solve the above problems, a first technical means of the present invention is a display device in which a speaker device having an elongated structure is arranged around a display unit, and the speaker device is positioned on the left and right sides of the display unit. A side speaker unit and a top speaker unit located above the display unit, and the side speaker unit has a short axis of the side speaker unit extending along the left-right direction of the display unit. The top speaker unit is installed toward the front side of the display unit while the short axis of the top speaker unit extends along the vertical direction of the display unit. It is characterized by being.

  According to a second technical means, in the first technical means, the top speaker unit is arranged above the side speaker unit.

  In the first or second technical means, a third technical means includes a first output mode for outputting sound from only the top speaker unit, and a second output mode for outputting sound from only the side speaker unit. And a mode setting unit for switching between a third output mode for outputting sound from the top speaker unit and the side speaker unit.

  The fourth technical means is a television apparatus including any one of the first to third technical means.

  According to the present invention, the side speaker unit can reproduce a wide sound field in the horizontal direction of the display unit, and the top speaker unit can reproduce a wide sound field in the vertical direction of the display unit. A display device having sound field reproduction capability can be provided.

1 is a front view of a display device according to a first embodiment of the present invention. It is a figure for demonstrating a top speaker part. It is a figure for demonstrating a side speaker part. 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 schematic block diagram of the display apparatus by 3rd Embodiment. It is a figure for demonstrating an example of operation | movement by a display apparatus.

(First embodiment)
FIG. 1 is a front view of a display device according to a first embodiment of the present invention. The display device 1 (for example, a thin television device) has a rectangular display unit 10. The display unit 10 is, for example, a liquid crystal display device, and is configured as a rectangular LCD (Liquid Crystal Display) panel having a liquid crystal layer, a glass substrate, or the like, or an edge light type in which LEDs are arranged on the side of a light guide plate. Equipped with a backlight.

The display unit 10 is partitioned by a frame 11, and a stand 12 is attached to the lower part of the center (also referred to as a panel center) of the display unit 10.
In addition, an elongated speaker device 15 is installed around the display unit 10, and the speaker device 15 can output sound within an audible band (for example, about 20 Hz to 20 kHz).

  Specifically, a horizontally long (long in the X direction in the figure) speaker BOX 13U is provided on the upper side surface of the display unit 10. When viewed from the front of the display device 1, for example, the top speaker unit 16L is installed at the left end of the speaker BOX 13U, and the top speaker unit 16R is installed at the right end of the speaker BOX 13U, for example.

  A vertically long (long in the Z direction in the figure) speaker BOX 13L is provided on the left side surface of the display unit 10, and a side speaker unit 15L is installed at the center of the speaker BOX 13L, for example. Also, a vertically long speaker BOX 13R is provided on the right side surface of the display unit 10, and a side speaker unit 15R is installed, for example, at the center of the speaker BOX 13R.

In this example, the speaker device is installed in the speaker BOX. However, the speaker device can be embedded in the frame 11.
The side speaker units 15L and 15R and the top speaker units 16L and 16R are, for example, substantially elliptical speakers, and are installed toward the front of the display unit 10 described in FIG. Thus, if it is installed toward the front of the display unit 10, it is not necessary to have a hidden speaker structure.

Specifically, as shown in FIG. 2A, the top speaker units 16L and 16R have a horizontally long casing 20 (long in the X direction shown in the figure). Fixing portions 21 for fixing the casing 20 to the speaker box 13U are formed.
A center cap 22 is provided at the center of the housing 20, and a diaphragm 23 is installed around the center cap 22. The diaphragm 23 has, for example, two parallel sides extending in the X direction shown in the figure, and the edge 24 of the diaphragm 23 is supported by the housing 20. Note that a voice coil, a magnet, and the like (both not shown) are provided behind the center cap 22 (in the negative direction of the Y axis in FIG. 2B). In addition to the track type (oval) described in the figure, the substantially elliptical speaker includes a speaker having a so-called elliptical or superelliptical diaphragm that does not have two parallel sides. . In the case of an elliptical type or a super elliptical type, the directivity is the same as that of the track type.

The short axes of the top speaker units 16L and 16R extend along the vertical direction (Z direction shown) of the display unit 10 described in FIG. 1, and the long axis thereof is the left-right direction (X shown) of the display unit 10. Direction).
In this manner, the elongated structure makes it difficult to be restricted by the design of the display device. Further, since it is not necessary to provide a sound guiding structure on the front surface of the speaker unit, the direct sound of the speaker unit can be delivered to the viewer.

As shown in FIG. 3, the side speaker units 15 </ b> L and 15 </ b> R have a vertically long casing 20 (long in the Z direction in the drawing). The structure of the side speaker units 15L and 15R is the same as that of the top speaker units 16L and 16R. For this reason, the structure which has the same function is attached | subjected with the same code | symbol, and detailed description is abbreviate | omitted.
On the other hand, the short axes of the side speaker portions 15L and 15R extend along the left-right direction (X direction in the figure) of the display unit 10 described in FIG. Direction).

  In the case of the elongated speaker device 15 such as the top speaker units 16L and 16R and the side speaker units 15L and 15R, the short axis direction (Z direction in the case of the top speaker units 16L and 16R, the side speaker unit 15L). , 15R is in the X direction), and the long axis direction (X direction in the case of the top speaker units 16L and 16R and Z direction in the case of the side speaker units 15L and 15R) is narrow.

  For example, when the sound pressure characteristics are measured using a microphone by rotating the speaker device around the long axis (X direction for the top speaker portions 16L and 16R, Z direction for the side speaker portions 15L and 15R). Even when measured by rotating 30 °, it was almost the same as when measured in front (no rotation: 0 ° rotation). Further, even when measured by rotating 60 °, in the audible band of 7 kHz or less, it is almost the same as when measured from the front (no rotation: 0 ° rotation), and it can be seen that the directivity in the minor axis direction is wide. On the other hand, for example, when the sound pressure characteristic is measured by rotating the speaker device around a short axis (Z direction in the case of the top speaker units 16L and 16R, X direction in the case of the side speaker units 15L and 15R). Since the sound pressure in the audible band of 1 kHz or higher is greatly reduced, it can be seen that the directivity in the long axis direction is narrow.

Further, sound pressure characteristics were measured using a microphone when only the side speaker unit 15L was driven and when both the top speaker unit 16L and the side speaker unit 15L were driven.
Specifically, the microphone was disposed in front of the upper left end (position of the top speaker unit 16L) of the display unit 10 shown in FIG. The distance from the display unit 10 to the front microphone is 1 m.

When the sound pressure characteristic is measured at the upper left end of the display unit 10, the side speaker unit 15L has a narrow directivity in the long axis direction. Therefore, when only the side speaker unit 15L is driven, as shown by a broken line in FIG. In addition, the sound pressure characteristics decreased in an audible band of 2 kHz or higher.
On the other hand, when both the top speaker unit 16L and the side speaker unit 15L are driven, the sound pressure characteristics do not decrease even in the audible band of 2 kHz or more as shown by the solid line in FIG. The characteristics could be improved. Thus, the narrow directivity in the long axis direction by the side speaker unit 15L can be supplemented by the wide directivity in the short axis direction by the top speaker unit 16L.

Further, the sound pressure characteristics were measured by placing the microphone in front of the lower left end of the display unit 10 shown in FIG. 1 (a position below the top speaker unit 16L and the side speaker unit 15L). The distance from the display unit 10 to the front microphone is 1 m.
When the sound pressure characteristics are measured at the lower left corner of the display unit 10, the side speaker unit 15L has a narrow directivity in the long axis direction. Therefore, when only the side speaker unit 15L is driven, as shown by a broken line in FIG. The sound pressure characteristics decreased in an audible band of 2 kHz or higher.

  On the other hand, when both the top speaker unit 16L and the side speaker unit 15L are driven, as shown by the solid line in FIG. 5, the sound pressure characteristic does not decrease even in an audible band of 2 kHz or higher, and the sound pressure characteristic is reduced. I was able to improve. Thus, the narrow directivity in the major axis direction by the side speaker unit 15L is also the minor axis direction by the top speaker unit 16L even when measured at the lower left corner of the display unit 10 (no speaker unit is installed). It can be seen that it can be compensated with a wide directivity.

In particular, since the directivity in the long axis direction is narrower than that in the short axis direction, the sound waves from the side speaker unit 15L and the sound waves from the top speaker unit 16L are less likely to interfere with each other. can do.
Note that the same results as above were obtained even when the sound pressure characteristics were measured by using the top speaker portion 16R and the side speaker portion 15R and placing the microphones at the upper right end and the lower right end of the display portion 10.

  Thus, the side speaker units 15L and 15R can reproduce a wide sound field in the left-right direction of the display unit 10, and the top speaker units 16L and 16R can reproduce a wide sound field in the vertical direction of the display unit 10. By combining these, a display device having a high sound field reproduction capability can be provided.

(Second Embodiment)
In the first embodiment, the top speaker unit 16L is disposed above the side speaker unit 15L, and the top speaker unit 16R is disposed above the side speaker unit 15R. However, the top speaker units 16L and 16R can be provided, for example, at a central position above the display unit.

(Third embodiment)
Alternatively, the top speaker units 16L and 16R and the side speaker units 15L and 15R may be properly used.
Specifically, as illustrated in FIG. 6, the control unit 30 of the display device 1 includes a communication unit 31, a mode setting unit 32, and a video / audio output unit 33. The control unit 30 includes, for example, one or a plurality of CPUs (Central Processing Units) and the like, for example, loads various programs and data stored in the ROM into the RAM, and executes the programs in the loaded RAM. To do. Thereby, the overall operation of the display device 1 is controlled.

  The control unit 30 can communicate with an external device and a remote controller (both not shown) via the communication unit 31. The video / audio output unit 33 receives, for example, a digital broadcast signal, demodulates and decodes it, executes video signal processing on the obtained video signal, and displays the video on the display unit 10. The video / audio output unit 33 executes audio signal processing on the audio signal obtained by demodulation and decoding, and outputs the audio from the top speaker units 16L and 16R and the side speaker units 15L and 15R.

Further, the mode setting unit 32 switches to the first to third output modes depending on the number of users according to the genre of the content to be viewed, for example, according to the preference of the user, and instructs the video / audio output unit 33.
Specifically, the first output mode is for outputting sound only from the top speaker units 16L and 16R (normal mode). The second output mode is for outputting sound from only the side speaker units 15L and 15R (realistic mode). The third output mode is a mode for outputting sound from both the top speaker units 16L and 16R and the side speaker units 15L and 15R (high presence mode).

As a preference by the user, when the user selects, for example, from the audio adjustment menu screen displayed on the display unit 10 with the remote controller or the like to change the mode or change the AV position, the mode setting unit 32 sets the first to first modes. Set the third output mode. Thus, based on the operation by the user, the sound field suitable for the program genre such as movies, music, sports, news, etc. can be easily reproduced.
For example, when the first output mode is selected on the audio adjustment menu screen in order to view content that does not require much presence, such as news and variety programs, only the top speaker units 16L and 16R are driven. In this case, as indicated by arrows in FIG. 7A, the sound spreads in the vertical direction but is difficult to spread in the horizontal direction, so that the sound field can be limited to the horizontal size range of the display unit 10.

  For example, when the second output mode is selected on the audio adjustment menu screen in order to view content with a sense of presence, such as a movie, only the side speaker units 15L and 15R are driven. In this case, as indicated by an arrow in FIG. 7B, the sound spreads in the left-right direction but hardly spreads in the up-down direction, so that the sound field can be limited to the vertical size range of the display unit 10.

  Further, when the third output mode is selected on the audio adjustment menu screen, for example, in order to view content with a high sense of presence such as a music program, the top speaker units 16L and 16R and the side speaker unit 15L , 15R are driven. In this case, as indicated by arrows in FIG. 7C, the sound spreads in the vertical direction and the horizontal direction, so that the sound field can exceed the vertical and horizontal sizes of the display unit 10.

  In addition, as the switching depending on the genre of the content to be viewed, the mode setting unit 32 can set the mode by referring to the genre information or the like as supplementary information of the broadcast wave or the media content. When the genre is news or the like, there is no need for a sense of presence, so in the normal mode, when it is a movie or the like, a sense of presence is desired, so the presence mode or the high presence mode is set. In this way, the user can automatically select and set the mode suitable for the content without performing any special operation.

  As switching by the number of users, the mode can be set depending on whether the number of users is one or the number of users. Specifically, when the user selects whether viewing is only one user or a large number of people on the menu screen or the like, the mode setting unit 32 can set the mode. When there is one user, no sound spread is required, and the normal mode is set. In the case of a large number of people, since there are a plurality of viewing positions, the presence mode or the high presence mode in which the sound is further spread is set.

DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 10 ... Display part, 11 ... Picture frame, 12 ... Stand, 13U, 13L, 13R ... Speaker BOX, 15 ... Speaker apparatus, 15L, 15R ... Side speaker part, 16L, 16R ... Top speaker part, DESCRIPTION OF SYMBOLS 20 ... Housing | casing, 21 ... Fixed part, 22 ... Center cap, 23 ... Diaphragm, 24 ... Edge, 30 ... Control part, 31 ... Communication part, 32 ... Mode setting part, 33 ... Video / audio output part

Claims (4)

A display device in which a speaker device having an elongated structure is arranged around a display unit,
The speaker device has a side speaker unit located on the left and right sides of the display unit, and a top speaker unit located on the upper side of the display unit,
The side speaker unit is installed toward the front of the display unit, with the short axis of the side speaker unit extending along the left-right direction of the display unit,
The display device according to claim 1, wherein the top speaker unit is installed toward a front surface of the display unit while a short axis of the top speaker unit extends along a vertical direction of the display unit. The display device according to claim 1,
The display device according to claim 1, wherein the top speaker unit is disposed above the side speaker unit. The display device according to claim 1 or 2,
A first output mode for outputting sound only from the top speaker unit, a second output mode for outputting sound only from the side speaker unit, and a sound output from the top speaker unit and the side speaker unit A display device comprising: a mode setting unit that switches between the third output modes. The television apparatus provided with the display apparatus as described in any one of Claim 1 to 3.

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