JP3909165B2 - Display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker system built in a main body housing of a display device such as a television receiver and a display device mounted with the speaker system, and particularly to reducing the horizontal width of the display device. The present invention relates to a speaker system having a structure suitable for the above, and a display device in which the speaker system is mounted to reduce the width and to reduce the installation space.
[0002]
[Prior art]
For example, as shown in FIG. 13, a speaker system built in a display device typified by a television receiver has a vertical screen so that it can be housed on both left and right sides of a display device (CRT 54) of the television receiver 51. A longitudinal speaker system 52 that is long in the direction may be used. The reason for this is to reduce the width Wt of the wide television and to make it compact with the widespread use of wide televisions having a horizontally long screen (aspect ratio of 16: 9).
[0003]
In this case, as shown in FIG. 14, a speaker system 52 having a configuration in which a speaker unit 56, which is an audio output source formed in an oval shape or an oval shape, is attached to a vertically-long speaker cabinet 57 is a main body of the television 51. It was installed between the side wall 53a of the front frame 53 of the housing and the cathode ray tube 54. In FIG. 14, reference numeral 57a denotes a baffle, and an opening 61 for attaching the speaker unit 56 is formed at the center thereof. Also, a bass reflex port 60 is provided above and below the opening 61 for enhancing the low frequency range of the sound. The speaker cabinet 57 forms a hollow box, and is disposed so as to face each other in the horizontal direction of the screen, and a pair of side plates 57d and 57e that face each other in the vertical direction of the screen. The top plate 57b and the bottom plate 57c connected to the upper and lower ends in the vertical direction of 57d and 57e respectively, and the side to which the baffle of the frame composed of the side plates 57d, 57e and the plates 57b and the bottom plate 57c is connected And a back plate 58 connected to the opposite end. The protrusions 59 formed on the top plate 57 b and the bottom plate 57 c are components for attaching the speaker system 52 to the main body housing of the television receiver 51.
[0004]
As conventional techniques for installing speaker systems on both the left and right sides of a cathode ray tube, those described in JP-A-6-237498 and JP-A-8-9486 are known.
[0005]
[Problems to be solved by the invention]
By the way, the configuration of the television receiver 51 shown in FIG. 13 has the advantage of reducing the horizontal width Wt of the television receiver 51 and making it compact, but the horizontal width Wt of the television receiver 51 is the width Wb of the cathode ray tube 54. And the left and right speaker system 52 width Ws cannot be added. Further, as shown in FIG. 14, the width Wc of the speaker cabinet 57 has the width Ws of the speaker unit 56, and therefore cannot be less than that. In other words, the configuration in the prior art (the configuration in which the speaker system is installed on both the left and right sides of the cathode ray tube) has a limit in reducing the width of the display device.
[0006]
Further, since the speaker system 52 has a depth Dc, there is the following problem when it is installed in the corner portion 62 of the room as shown in FIG. That is, in consideration of the case where it is installed in the corner portion, the left and right corner portions 63 of the rear housing of the television receiver 51 are often cut. In this case, if the volume of the speaker cabinet 57 is increased, the depth Dc of the speaker cabinet 57 is increased, and it is difficult to make a configuration in which the left and right corner portions 63 of the rear housing of the television receiver 51 are largely cut.
[0007]
In addition, the vibration generated in the speaker system may be transmitted to the shadow mask of the cathode ray tube attached to the housing of the television receiver 51 through the housing of the television receiver 51, and the shadow mask may vibrate to cause color unevenness. there were. This phenomenon was remarkable in a flat cathode ray tube.
[0008]
The present invention has been made in view of the above problems, and an object thereof is to provide a display device having a speaker system suitable for reducing the width of the display device.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a display according to the present invention includes a display device that displays video on a screen and a speaker system that outputs audio, wherein the speaker system is the display device. The sound output unit that is installed above or below the speaker system and that faces at least the front of the display device of the speaker system is formed longer in the screen horizontal direction than the screen vertical direction of the display device, and the sound output unit A hollow speaker cabinet having a cross section parallel to the screen longer in the horizontal direction than the vertical direction of the screen and extending in the depth direction of the display device is connected to the rear of the screen.
[0011]
In the above configuration, the audio output unit may be a speaker unit that is an audio output source of the speaker system.
[0012]
The speaker cabinet may include a front speaker cabinet and a rear speaker cabinet arranged along the depth direction of the display device.
[0013]
Further, the rear speaker cabinet is characterized in that a cross section perpendicular to the screen vertical direction has a trapezoidal shape in which a portion corresponding to the rear portion of the display is cut obliquely.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front perspective view of a television receiver with a built-in speaker system according to the present invention. Here, a television receiver will be described as an example of the display device. In FIG. 1, reference numeral 5 denotes a back cover, and the front frame 3 and the bottom plate 3a constitute a main body casing. A cathode ray tube 4 and a pair of speaker systems 2 are built in a main body housing constituted by the back cover 5, the front frame 3, and the bottom plate 3a. The speaker system 2 is disposed between the lower portion of the cathode ray tube 4 and the bottom plate 3 a, near the left and right ends of the television receiver 1, and attached to the front frame 3. Further, as is apparent from FIG. 1, the speaker system 2 has an audio output unit including a speaker that forms a so-called horizontally long rectangle whose dimension in the horizontal direction of the screen is longer than that in the vertical direction of the screen. This audio output unit faces the front (screen viewing side) of the television receiver 1. The speaker system 2 is a rectangular speaker cabinet that extends in the depth direction of the television receiver 1 and has a cross-sectional shape parallel to the screen of which is longer in the horizontal direction than in the vertical direction. Connected with. The speaker cabinet is hollow, and a reinforcing bar for improving the strength is provided inside the speaker cabinet. Details thereof will be described later.
[0017]
Next, an example of a specific configuration of the speaker system according to the present invention will be described with reference to FIG. A speaker system 2 shown in FIG. 2 includes a speaker unit 6, a front speaker cabinet 7, and a rear speaker cabinet 8. The speaker unit 6 includes a speaker that outputs sound, and is a horizontally long rectangle formed longer in the horizontal direction of the screen than in the vertical direction of the screen of the display device. In addition, the front cabinet 7 and the rear cabinet 8 are made by plastic injection molding, but are not limited thereto.
[0018]
The front speaker cabinet 7 is for attaching the baffle 7a, the top plate 7b, the bottom plate 7c, the left and right side plates 7d and 7e, and the speaker system 2 to which the speaker unit 6 is attached to the side wall 3a of the front frame 3 of the main body housing of the television 1. And the opening 10 of the baffle 7a to which the speaker unit 6 is attached. The top plate 7b and the bottom plate 7c are arranged to face each other in the vertical direction of the screen, and are connected to a pair of side plates 7d and 7e arranged to face each other in the horizontal direction of the screen, thereby forming a frame. ing. A baffle 7a in which the speaker unit 6 is fitted in the opening 10 is connected to the front end of the frame (the front side of the television receiver 1). The front speaker cabinet is formed so as to be longer in the horizontal direction of the screen than in the vertical direction of the screen and extending in the depth direction of the display device, and the cross-sectional shape parallel to the screen is a rectangle similar to the speaker unit 6. is there. Further, the cabinet 7 is provided with one or a plurality of bass reflex ports 11 for expanding the low sound range. The bass reflex port 11 is provided in parallel with the opening 6 into which the speaker unit 6 is fitted in the horizontal direction of the screen.
[0019]
The rear speaker cabinet 8 includes a top plate 8b, a bottom plate 8c, left and right side plates 8d and 8e, and a back plate 8a. The top plate 8b and the bottom plate 8c are arranged to face each other in the vertical direction of the screen, and are connected to a pair of side plates 8d and 8e arranged to face each other in the horizontal direction of the screen. A frame is formed. A back plate 8a is connected to the rear end (the rear side of the television receiver 1) of the frame. The front end is connected to the end of the front speaker cabinet 7 to which the baffle 7a is not connected. Similarly to the front speaker cabinet, the rear speaker cabinet 8 is formed so as to be longer in the horizontal direction of the screen than in the vertical direction of the screen and extending in the depth direction of the display device. Made of a rectangle.
[0020]
In the speaker system 2, the speaker unit 6 is previously attached to the baffle 7a of the cabinet 7 with a plurality of screws, and then the rear cabinet and 8 are attached to the front cabinet 7 with a plurality of screws. After attaching the cathode ray tube 4 to the front frame 3 of the main body housing of the television 1, the main body has a plurality of protrusions 9 formed integrally with the side plates 7d and 7e of the front cabinet 7 of the pre-assembled speaker system 2. A plurality of screws are attached to a predetermined position of the bottom plate 3a of the front frame 3 of the housing. Then, an electronic circuit board (not shown in FIG. 1) is attached, and the back cover 5 of the main body casing is attached to the front frame 3 of the main body casing with a plurality of screws and assembled. In FIG. 2, the bass reflex port 11 is provided on the left side (inside as a television 1 receiver) of the baffle 7a, but may be provided on the right side (outside).
[0021]
Further, a projection 9 provided on the front cabinet 7 of the speaker system 2 to be attached to the main body housing of the television receiver 1 is a speaker system comprising the front cabinet 7, the rear cabinet 8 and the speaker unit 6. 2 on the balance point of the mass in the front-rear direction (on the balance line), that is, on the line including the center of gravity of the speaker system 2 (parallel to the horizontal direction of the screen). This makes it difficult for vibration generated in the speaker system 2 to be transmitted to the cathode ray tube 4 attached to the main body housing of the television 1, so that the shadow mask of the cathode ray tube does not vibrate and color unevenness is less likely to occur. is there.
[0022]
A plan view of a cross section orthogonal to the screen vertical direction of the television receiver according to the present invention shown in FIG. 1 is as shown in FIG. However, in order to increase the volume of the speaker cabinet, it is necessary to increase the depth dimension of the speaker cabinet. As a result, the dimension Wr of the rear surface of the television 1 is increased, and the space for installing the television receiver 1 at the four corners of the room is deteriorated.
[0023]
Therefore, as shown in FIG. 4, the rear portion of the back cover 5 of the main body housing is set to 45 degrees so as to increase the inner volume of the rear portion of the cabinet 12 and to make it easier to install the television 1 at the four corners of the room. In some cases, therefore, the rear part of the rear cabinet 12 of the speaker cabinet is shaped so as to form an angle of 45 degrees with respect to the side wall 3 of the front frame 3. In this way, it becomes easy to take installation space.
[0024]
Incidentally, since the speaker system 2 shown in FIG. 2 has a flat shape structure as a whole, it is inherent to the standing wave and the material and shape structure of the cabinet 7 due to the sound pressure radiated to the rear surface of the speaker unit 6. Cause resonance. As a result, a peak, a dip and a distorted sound are generated on the reproduction sound pressure frequency characteristic. In order to suppress this, it is only necessary to provide one or a plurality of reinforcing bars that connect the top plates 7b, 8b and 7c, 8c, which have large areas of the front cabinet 7 and the rear cabinet 8, respectively. This will be described with reference to FIGS.
[0025]
As shown in the plan sectional view of FIG. 5, one or more reinforcing bars 7f, 8f are connected so that the top plate 7b, bottom plate 7c of the front cabinet 7 and the top plate 8b of the rear cabinet, and the bottom plate 8c are connected to each other. Are integrally formed. Further, in the front cabinet 7 shown in FIG. 5, the bass reflex port 11 is formed as a square tube with a partition 7g also serving as a reinforcing bar, a top plate 7b, a bottom plate 7c, and a side plate 7d. It is.
[0026]
The shape of the bass reflex port 10 shown in FIG. 5 is a simple square tube. Similarly, the reinforcing bar 7f is a simple plate. This is because the mold of the cabinet 7 is considered to be configured with the simplest upper and lower molds (front and rear molds). Similarly, the structure of the front cabinet 7 having the configuration shown in FIG. 5 is such that the front cabinet 7 has an opening 10 in the baffle 7a and the rear surface of the front cabinet 7 is attached to the rear cabinet 8 as shown in FIG. Therefore, the reinforcing bar 7f is easy to configure. If a mold using a slide core is used, a more complicated configuration can be obtained.
[0027]
5 and 6, the reinforcing bar 7f of the front cabinet 7 having the configuration shown in FIG. 5 may be non-parallel to the side plates 7d and 7e as shown in FIG.
[0028]
Further, the structure of the front cabinet 7 and the rear cabinet 8 having the shapes shown in FIGS. 5, 6 and 7 makes the cabinet 7 strong and suppresses cabinet vibration. Is flat and the depth dimension Ds is large, a standing wave is generated, and a dip and a peak are generated on the sound pressure frequency characteristic i as shown in FIG. Therefore, as shown in FIGS. 5 and 6, the sound absorbing material 13 is inserted at a position substantially half the depth dimension Ds of the speaker cabinet. By inserting the sound absorbing material 13, as shown in FIG. 8, a smooth sound pressure frequency characteristic B without dip and peak is obtained. As a result, there is an effect that a clear reproduction sound without distortion sound can be obtained.
[0029]
Next, an example of the embodiment of the present invention regarding the cabinet shape configuration of the speaker system in consideration of the attachment of the speaker system to the main body of the television receiver 1 will be described.
[0030]
9 and 10 are a plan view and a cross-sectional view as viewed from the side, showing an embodiment. The main electronic circuit board 14 is a printed circuit board having a relatively large area with a thickness of about 1 to 1.5 mm, but three or four sides are supported by a frame 15 to prevent breakage (in FIG. 9). 3 sides). 9 and 10, the main electronic circuit board 14 whose periphery is held by the frame 15 is inserted into the gap between the cathode ray tube 4 and the speaker system 12 ′. Below the cathode ray tube 4 of the main body of the television 1 receiver is a remote control receiver, a main power button, and a manual control panel 16. It is not preferable that the height Hc of the control panel 16 is increased in design.
[0031]
Since the frame 15 for holding the main electronic circuit board 14 has a thickness of about 10 mm, in FIG. 10, in order to suppress the height Hc of the control panel 16, as shown in FIG. The top plate is cut by the thickness of the frame 15 (the height of the cabinet is lowered).
[0032]
Since the speaker cabinet shown in FIG. 11 is configured to be attached to the right side, a symmetrical mold is required for the left side. Therefore, if the top plate and the bottom plate are shaped as shown in FIG. 12 and the left and right are reversed and attached, the cost of one mold can be reduced.
[0033]
In the description of this embodiment, a television receiver has been described as an example of a display device. However, the present invention is not limited to this, and is used as a monitor for a computer terminal such as a personal computer or a workstation. Needless to say, this also applies to the display used. In the description of the present embodiment, the configuration in which the speaker system 2 is installed below the CRT 4 has been described as an example, but the speaker system 2 may be installed above the CRT. Furthermore, although a cathode ray tube has been described as an example of a display device, it goes without saying that the present invention is similarly applied to a display device using another display device such as a PDP or a liquid crystal panel.
[0034]
【The invention's effect】
As described above, according to the present invention, the width of the display device can be reduced. Moreover, if the top plate and the bottom plate of the speaker cabinet are connected by a plurality of reinforcing bars, a strong cabinet structure is obtained, and there is an effect that the cabinet vibration is suppressed and a clear reproduced sound without abnormal sound can be obtained.
[0035]
Furthermore, a projection for mounting to the display device is provided on the balance point (on the balance line) of the mass in the front-rear direction of the speaker system, that is, on the line including the center of gravity, and the projection is attached to the television body housing, thereby This makes it difficult to transmit vibrations to the screen, and the shadow mask does not vibrate.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a shape configuration of a speaker system in a television receiver according to the present invention as seen from an oblique direction. FIG. 2 is a perspective view showing an example of a speaker system configuration according to the present invention. FIG. 4 is a plan view showing a cross section orthogonal to the screen of a television receiver with a built-in speaker system according to the present invention. FIG. 5 is a cross-sectional view showing an example of an internal structure of a speaker cabinet in the speaker system according to the present invention. FIG. 6 is a cross-sectional view showing an example of the speaker system and the rear portion of the television receiver. FIG. 7 is a cross-sectional view showing another example of the internal structure of the speaker cabinet in the system. FIG. 8 is a cross-sectional view showing still another example of the internal structure of the net. FIG. 8 is a sound pressure frequency characteristic diagram showing the effect of the speaker cabinet configuration of the speaker system of the present invention. FIG. 10 is a sectional view in which a speaker system is attached to the television housing body of the present invention. FIG. 11 is a speaker in which the speaker system is attached to the television housing body of the present invention. FIG. 12 is a perspective view of another embodiment showing the shape and configuration of the speaker system cabinet in consideration of the mounting arrangement of the speaker system on the television housing body of the present invention. FIG. 13 is a perspective view showing a shape configuration of a speaker system in a conventional television as seen from an angle. Fig. 15 is a perspective view showing the shape and configuration of a baffle surface of a cabinet to which a speaker unit of a conventional speaker system is mounted. Fig. 15 is a schematic diagram showing a room in which a television main body housing with a conventional speaker system is installed. Explanation of]
DESCRIPTION OF SYMBOLS 1 ... Television receiver, 2 ... Speaker system, 3 ... Front frame of television main body housing, 4 ... CRT, 5 ... Back cover of television main body housing, 6 ... Speaker unit, 7 ... Front speaker Cabinet: 8 ... Rear speaker cabinet, 9 ... Projection for mounting the speaker cabinet, 10 ... Bass reflex port, 11 ... Baffle opening, 12, 12 '... Speaker system, 13 ... Sound absorbing material, 14 ... Main electronic circuit board, 15 ... Frame for supporting and mounting the main electronic circuit board 14, 16 ... Control panel.

Claims (4)

A display device that displays video on the screen;
In a display device comprising a speaker system for outputting sound,
The speaker system is installed above or below the display device, and at least the shape of the audio output unit facing the front of the display device of the speaker system is longer in the horizontal direction of the screen than in the vertical direction of the screen of the display device. Formed,
A hollow speaker cabinet having a cross section parallel to the screen extending in the horizontal direction of the screen than the vertical direction of the screen and extending in the depth direction of the display device is connected to the rear of the audio output unit. Display device. The display device according to claim 1,
The display apparatus, wherein the audio output unit is a speaker unit that is an audio output source of the speaker system. The display device according to claim 1,
The display device, wherein the speaker cabinet includes a front speaker cabinet and a rear speaker cabinet arranged along a depth direction of the display device. The display device according to claim 3.
The display device according to claim 1, wherein the rear speaker cabinet has a trapezoidal shape in which a section perpendicular to the vertical direction of the screen is cut obliquely at a portion corresponding to the rear portion of the display.

Images