JPH06284488A - Speaker system for television set - Google Patents

Abstract

(57) [Summary] [Purpose] To enable a stereoscopic sound field reproduction with a sense of reality during stereo reception of a television set. [Structure] Front speakers 13 and 14 for radiating sound in the front direction of the cathode ray tube 12 and a television set upper surface portion are provided to radiate sound to the left and right diagonally forward with respect to the surface of the cathode ray tube and the television from the rear part. A reflection type directional emphasis speaker 101 which emits a sound wave having a phase different from that of the sound emitted diagonally forward also inside the John set,
This reflection type directional emphasis speaker 10 is provided with
The sound waves radiated from the rear part of the television set 1, 102 inside the television set are emitted from the back cover forming the television set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker system of a television set capable of stereoscopically reproducing a stereo sound in a television set in a room.

[0002]

2. Description of the Related Art In a television set having a built-in audio multiplexing function, in order to receive stereo sound or two sounds,
It has two speakers on the left and right.

FIG. 9 shows a perspective view of such a television set with built-in audio multiplex provided with two speakers on the left and right, and FIG. 10 shows the sound waves when the television set of FIG. 9 is placed indoors. Shows the direction.

In FIGS. 9 and 10, 10 is a television set, 11 is a television set housing, 12 is a cathode ray tube, 13 is a left front speaker, 14 is a right front speaker, and 18 is a wall surface of a room. The left and right two speakers 13 and 14 are arranged on the front panel of the set housing 11. At this time, the directions and spreads of the sound waves output from the speakers 13 and 14 are as shown in FIG.

Conventionally, many places for disposing the speakers in a television set are set in the installation space of the cathode ray tube, and they are disposed on both sides of the screen of the cathode ray tube or on the upper part or the lower part.

In recent years, the screen has become larger due to the trend toward larger television sets and wider screens. However, the size of the television set itself cannot be increased so much due to the purchaser's installation space, and naturally the speaker unit is not available. The space for installing is narrow.

For this reason, the sound in the television set is reproduced by a comparatively small speaker arranged around the cathode ray tube, and only a small sound with a poor sense of sound field and a small sense of movement to the left and right is reproduced. could not.

[0008] In the case of a television set, since the left and right speakers are close to each other, the stereo feeling is inferior to the reproduction in the speaker arrangement of a general stereo system, and the feeling of movement to the left and right even during stereo reproduction. It was difficult to feel.

In particular, recently, a television set having a horizontally long screen size such as a wide television set having a screen size of 16 to 9 and a high-definition television set has been commercialized. The speaker system placed on both sides of the television set must use a slim type with a small width dimension because of the need to improve the space factor because it becomes larger than There was a shortage problem.

By the way, conventionally, an omnidirectional speaker system using a reflector has been utilized and commercialized in the field of audio equipment.

FIG. 11 is a vertical sectional view of a speaker device used in an audio device. 20 is a speaker device, 21
Is a speaker cabinet, 22 is a bass speaker, and 23 is
Is a high-frequency speaker, 24 is an upper speaker arranged on the upper surface of the cabinet 21, 25 is a substantially conical non-directional reflecting member which is arranged in front of the upper speaker 24 and radiates sound waves in the horizontal direction, and 26 is It is a mesh member for holding the omnidirectional reflection member 25 on the speaker 24 and transmitting sound.

The speaker device 20 shown in FIG.
While radiating sound forward at 2 and 23, a sound wave is radiated horizontally by a combination of an upper peaker 24 that radiates sound vertically upward and a substantially conical reflecting member 25 arranged on the front surface of the speaker. However, the directional characteristics of sound in the horizontal direction are to be improved.

Also in the speaker of the television set, as shown in FIG. 12, the television set housing 1
Speakers 13 and 14 are attached to the left and right side panels of No. 1 and the reflection members 15 and 16 are disposed on the left and right side panels.
Accordingly, a system that emits sound waves forward has also been commercialized. This is because the volume (area) occupied by the cathode-ray tube 12 in the television set is large, and space cannot be taken in the front panel around the cathode-ray tube. This is a method of attaching and reflecting sound waves forward by the reflectors 15 and 16.

However, in this system, the reflecting member is projected on the side panel of the television set casing 11 to form a complicated shape, and it is not possible to sufficiently satisfy the sound field feeling and the sound volume feeling.

[0015]

As described above, in the conventional speaker system of the television set, the sound field feeling and the sound volume feeling are poor, and the three-dimensional sound field reproduction cannot be performed.

In view of these problems of the prior art, the present invention provides a speaker system of a television set which enables stereoscopic sound field reproduction during stereo reception and provides a sound field feeling and a volume feeling. That is the purpose.

[0017]

According to a first aspect of the present invention, there is provided a speaker system for a television set, wherein the speaker system is a front speaker for emitting sound in a front direction of the television set, and an upper surface portion of the television set. And has a directional reflector that radiates sound diagonally forward of the television set, and radiates a sound wave having a different phase from the sound radiating diagonally forward from the rear into the interior of the television set. A reflection type directional emphasis speaker, wherein sound waves radiated from the rear part of the reflection type directional emphasis speaker into the inside of the television set are emitted from a rear cover forming the television set. It is a thing.

According to a second aspect of the present invention, there is provided a speaker system for a television set in which a front speaker for emitting sound in a front direction of the television set and a horizontal direction provided on the upper surface of the television set. A reflection type omnidirectional speaker that emits sound and also emits a sound wave having a phase different from that of the sound in the horizontal direction is provided inside the television set, and the television is provided from a rear portion of the reflection type omnidirectional speaker. The sound wave radiated into the interior of the television set is emitted from the back cover forming the television set.

[0019]

According to the present invention, the sound of the front speaker is radiated from the front of the television set toward the front, and the same signal as this is emitted from the reflection type directional emphasis speaker or the reflection type omnidirectional speaker provided on the upper surface. Emitted from the sex speaker.
The front speakers arranged on the left and right of the front of the television set generate the mid-range sound necessary for the pronunciation of human voice, and the reflection type directional emphasis speaker or the speaker arranged on the upper surface. By the reflection type omnidirectional speaker, sound is radiated diagonally in front of the television set or in the entire circumference in the horizontal direction, and a sense of sound spread can be provided. Further, a sound having a phase different from the sound in the obliquely forward direction or the sound in the horizontal direction is radiated from the rear portion of the reflection type directional emphasis speaker or the reflection type omnidirectional speaker into the inside of the television set, and the rear surface of the television set. Pronounced from the cover.
In this way, in the form that surrounds the cathode ray tube from the entire circumference of the television set, since the same sound and sounds with different phases are radiated from different places respectively, due to the delay of the sound and the phase shift due to the difference in the position of the sound, A sound with a three-dimensional effect can be reproduced.

[0020]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is a perspective view showing a speaker system of a television set according to an embodiment of the present invention.

In FIG. 1, reference numeral 11 denotes a television set casing, which is composed of a front panel and a rear cover. Left and right front speakers 13 and 14 that radiate sound waves are provided on the front panel on both the left and right sides of the screen of the cathode ray tube 12. In addition, on both left and right sides of the upper surface portion of the television set, the reflection type directional emphasis speaker 10 with the central axis of the speaker oriented in the ceiling direction (vertical direction).
1, 102 are provided. The reflection-type directional emphasis speakers 101 and 102 are arranged such that the central axes of the upper speakers 31 and 32 are oriented in the vertical direction and the diaphragms thereof are directed upward, and sound waves are placed on the front surfaces of the respective diaphragms. While having a reflection function to reflect in the horizontal direction, a directional reflection member having a directional function to emit the reflected sound wave in a predetermined range in the horizontal direction is arranged, and directivity is given to a specific range in the horizontal direction. Has become. The reflection-type directional emphasis speakers 101 and 102 radiate sound waves emitted from the front surfaces of the diaphragms of the upper speakers 31 and 32 to a certain horizontal range (for example, an outer oblique direction) by the reflecting members 33 and 34, while the upper speakers. The sound emitted from the rear surface of the diaphragms 31 and 32 is radiated into the set housing 11. Television set housing 1
The sound wave radiated inside 1 has a different phase from the sound emitted from the front surface of the diaphragm, and is emitted to the outside of the television set through the sound emission opening 39 provided in the rear cover of the set housing 11. It The sound emitting opening 39 may be a ventilation hole for radiating heat generated in the television set, instead of a dedicated opening. In the present embodiment, one of the reflection type directional emphasis speakers 101 has an upper speaker 31, a reflection member 33 for changing the sound wave emitting direction to a horizontal direction, and a reflection member 33 that supports the reflection member 33. The mounting member 35 is configured to radiate a sound wave whose direction is changed in a fixed direction (an oblique direction outward with respect to the surface of the cathode ray tube 12 in the figure). The other reflection type directional emphasis speaker 1
Similarly, 02 is composed of the above-mentioned upper speaker 32, the reflecting member 34, and the mounting member 36. In this embodiment, non-directional reflecting members 33 and 34 having a substantially conical shape are arranged on the front surfaces of the upper speakers 31 and 32 by using mounting members 35 and 36 having a directional function. .
Details of the reflection type directional emphasis speakers 101 and 102 will be described with reference to FIGS. 2 and 3 described later. The reflecting member 33 and the mounting member 35 may be integrally molded or may be formed by joining separate molded products. The same applies to the reflecting member 34 and the mounting member 36.

FIG. 2 is a reflection type directional emphasis speaker 1 of FIG.
It is a longitudinal cross-sectional view of 01. As shown in FIG. 2, the mounting member 3
5 is an omnidirectional reflection member 33 that reflects sound horizontally.
It is configured to include an opening 35A for emitting sound in a horizontal fixed direction and a shield 35B for reflecting the sound emission in the opening direction.

FIG. 3 is an exploded view of the structure of the reflective directional emphasis speaker 101. In FIG. 3, the reflective directional emphasis speaker 101 includes an upper speaker 31, a reflective member 33, and a mounting member 35 to which the reflective member 33 is mounted. In FIG. 3, the reflection member 33
The mounting member 35 and the mounting member 35 are integrally formed.
In this case, a substantially conical shape having the function of the reflection member 33 is integrally molded. 35A is an opening, 35B
Is a shield.

In the television set thus constructed, the left and right stereo audio signals supplied to the upper speakers 31 and 32 are, for example, the left and right front speakers 1.
The signals are the same as those supplied to 3 and 14, respectively. For that purpose, the upper speaker 31 may be connected to the audio signal line of the front speaker 13 and the upper speaker 32 may be connected to the audio signal line of the front speaker 14 inside the television set.

In FIGS. 1 to 3, the upper speaker 31
The non-directional reflection member 33 is attached to the front of the diaphragm of the mounting member 35.
1 is used for the arrangement, the relationship between the conventional speakers 13 and 14 and the reflectors 15 and 16 shown in FIG.
The reflective directional emphasis speakers 101 and 102 may be arranged on the upper surface of the television set.

FIG. 4 shows another embodiment of the reflection type directional emphasis speaker.

In FIG. 4, a flat plate-shaped reflector 41 is arranged in front of (ie, above) the diaphragm of the upper speaker 31 with a predetermined angle of inclination with respect to the horizontal direction, and sound waves are transmitted in a certain range in the horizontal direction (for example, It shows the one that is radiated in the outer oblique direction). In FIG. 4, the reflection surface 41A on which the sound of the reflection plate 41 hits is formed in a convex lens shape, and a plurality of through holes 41B penetrating in the plate thickness direction are formed in the reflection plate 41.

By configuring the reflection plate 41 in this way,
The sound of the upper speaker 31 is reflected by the convex surface 41A of the reflection plate 41 and radiated in a substantially horizontal direction. At this time, the high frequency components of the sound are efficiently reflected, but the middle and low frequency components of the sound are reflected by the reflector 41.
It is possible to radiate to the outside through the through hole 41B. This is because, in general, the high frequency range component is easily reflected by the reflection surface, but the middle low frequency range component is contained in the reflection surface, so that the middle low frequency range is radiated through the through hole 41B.

The through holes 41B may be provided in a larger number or a smaller number than the illustrated state. Further, the reflection surface on which the sound of the upper speaker 31 is reflected is not limited to the convex lens shape as illustrated, but may be a flat surface shape or a concave lens shape. In this way, the sound quality heard by the user can be changed by changing the shape of the reflecting surface and the number of through holes.

FIG. 5 is a vertical sectional view showing a speaker system of the television set shown in FIG.

As shown in FIG. 5, the television set casing 1 is viewed from the rear surface of the diaphragm of the upper speaker 31 (and 32).
Sound wave b generated inside the television set housing 1
Sound is emitted to the outside of the television set housing 11 through the plurality of openings 39 provided in the back cover of the No. 1. The phase of the sound wave b is different from that of the sound wave a emitted from the front surface of the diaphragm.

FIG. 6 shows a state of sound waves radiated from each speaker of the television set in the embodiment of FIG. In FIG. 6, the sound output opening 39 is provided on the side surface and the back surface of the rear cover of the television set housing 11.

As shown in FIG. 6, sound waves A from the left and right front speakers 13 and 14 on the front of the television set are radiated forward from the television set, and the same signal as this is emitted on the left and right sides provided on the upper surface. Sound waves B are radiated from the reflection type directional emphasis speakers 101 and 102.
The front speakers 13 and 14 arranged on the left and right sides of the front of the television set generate a mid-range sound necessary for pronouncing a human voice, and the user can clearly hear the dialogue. In addition, the reflection type directional emphasis speaker 101, which is disposed on the upper surface of the television set,
102 is a reflecting member 3 for widening the directivity in the high frequency range.
The sound generated from the front surface of the diaphragm has a wide directivity in the same band as that of the sounds of the front speakers 13 and 14, and is radiated from a place slightly away from the front speakers. The sound is radiated obliquely outside and outside the television set with a time delay (a sound with a phase shift) due to the above. The sound radiated obliquely forward is propagated to the front of the television set by being reflected by the wall surface of a room (not shown) in which the television set is set, so that the sound can be spread.

Further, the reflection type directional emphasis speaker 101,
Sound generated from the rear surface of the diaphragm 102 is radiated inside the television set, and is radiated as sound waves C and D outside the television set through the openings 39 provided on the side surface and the back surface of the rear cover of the television set. .

Here, the reflection type directional emphasis speaker 10
Since the sound generated from the rear surface of the diaphragm 1 and 102 is emitted from the rear surface of the diaphragm, it is a sound with a frequency lower than the middle range, which is delayed in phase and attenuated in the high range, compared with the sound emitted from the front surface of the diaphragm. .

It should be noted that in a television set, as shown in FIG. 7, the back cover is usually arranged near the wall surface 18 of the room, and in such an arrangement, the sound wave D radiated from the back cover to the outside is provided. Is propagated in front of the television set by being reflected by the wall surface 18 and the ceiling.

As described above, the same sound and sounds having different phases are radiated from different places in such a form that the cathode ray tube is surrounded from the entire circumference of the television set, so that a stereoscopic effect is caused due to sound delay and phase shift. It is possible to reproduce certain sounds.

FIG. 8 shows a speaker system of a television set according to another embodiment of the present invention. This embodiment shows a vertical cross-sectional view when a reflective omnidirectional speaker 103 is arranged instead of the reflective directional emphasis speaker 101 shown in FIG. A similar reflection type omnidirectional speaker is used for the other reflection type directional emphasis speaker 102 of FIG.

As shown in FIG. 8, in the reflection type omnidirectional speaker 103, the central axis of the upper speaker 31 is oriented in the vertical direction, and the diaphragm thereof is oriented upward, and the front surface of the diaphragm is arranged. Is a configuration in which an omnidirectional reflection member 37 having a function of reflecting sound waves over the entire circumference in the horizontal direction is arranged by using a mesh member 38. FIG. 9 is an exploded view of the configuration of the reflective omnidirectional speaker 103. As shown in FIG. 9, the reflection-type omnidirectional speaker 103 includes an upper speaker 31, an omnidirectional reflection member 37, the reflection member 37 held on the upper portion of the speaker 31, and the reflected sound waves in the entire horizontal direction. And a net-like member 38 formed in a cap shape so as to allow the light to penetrate therethrough. The omnidirectional reflection member 37 and the cap-shaped net member 38 are locked at the center with screws or the like.

In the embodiment of FIG. 8, the sound wave a emitted from the front surface of the diaphragm of the upper speaker 31 (and 32) is radiated over the entire circumference in the substantially horizontal direction, and at the same time, the sound wave a emitted from the rear surface of the upper speaker diaphragm. Sound waves b having different phases are emitted from a plurality of openings 39 provided in the back cover of the television set housing 11. In the configuration shown in FIG. 8, since the reflective omnidirectional speaker 103 is used, the sound wave a radiated over 360 ° around the television set can be obtained. Therefore, when the reflection type omnidirectional speaker is used, the required sound wave a can be obtained even if the position where the speaker 31 is arranged is set lower than the top plate of the housing 11, so that the television set can be used. It becomes possible to make it compact.

According to the embodiment of FIG. 8 described above, the sound of the front speaker (not shown) is radiated from the front of the television set toward the front, and the same signal as this is reflected by the upper surface. Emitted from a type omnidirectional speaker.
The front speakers on the left and right of the front of the television set generate the mid-range sound necessary for the pronunciation of human voices, and the reflection type omnidirectional speakers on the top surface You can get a sense of sound spread. Further, a sound wave of a phase different from the phase of the front surface of the diaphragm is radiated from the rear surface of the diaphragm of the reflection type omnidirectional speaker into the inside of the television set, and the opening of the rear cover of the television set causes the sound wave of the television set. Sound is emitted to the outside. In this way, in the form that surrounds the cathode ray tube from the entire circumference of the television set, since the same sound and sounds with different phases are radiated from different places respectively, due to the delay of the sound and the phase shift due to the difference in the position of the sound, A sound with a three-dimensional effect can be reproduced.

[0042]

As described above, according to the present invention, a stereophonic sound field can be reproduced at the time of stereo reception of a television set, and a stereo sound having a sound field feeling and a volume feeling can be obtained. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a speaker system of a television set according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the reflective directional emphasis speaker shown in FIG.

FIG. 3 is an exploded perspective view of a reflective directional emphasis speaker.

FIG. 4 is an exploded perspective view showing another embodiment of the reflection type directional emphasis speaker.

5 is a vertical cross-sectional view showing a speaker system of the television set shown in FIG.

6 is a perspective view showing a state of a sound wave emitted from each speaker in the speaker system of the television set shown in FIG.

FIG. 7 is a side view showing an arrangement example of the television set shown in FIG.

FIG. 8 is a vertical sectional view showing a speaker system of a television set according to another embodiment of the present invention.

9 is an exploded perspective view of the reflective omnidirectional speaker in FIG.

FIG. 10 is a perspective view showing a speaker system of a conventional television set.

11 is an explanatory diagram showing directions and spreads of sound waves in a room by the speaker system of FIG.

FIG. 12 is a vertical cross-sectional view showing a speaker system of a conventional audio device.

FIG. 13 is a perspective view showing a speaker system of a television set of another conventional example.

[Explanation of symbols]

 11 ... Television set housing 12 ... CRT 13, 14 ... Front speaker 31, 32 ... Upper speaker 33, 34 ... Reflecting member 35, 36 ... Mounting member 35A ... Opening 35B ... Shield 37 ... Omnidirectional reflecting member 38 ... Mesh member 39 ... Sound emission opening 41 ... Reflector 41A ... Reflective surface 41B ... Through holes 101, 102 ... Reflective directional emphasis speaker 103 ... Reflective omnidirectional speaker

Claims (2)

[Claims] 1. A front speaker for radiating sound in a front direction of a television set, and a directional reflector provided on an upper surface of the television set and radiating sound obliquely forward of the television set. And a reflection type directional emphasis speaker which emits a sound wave having a phase different from that of the sound radiated obliquely forward from the rear part inside the television set, and the rear part of the reflection type directional emphasis speaker. A speaker system of a television set, wherein a sound wave radiated from the inside to the inside of the television set is emitted from a back cover forming the television set. 2. A front speaker for emitting sound in the front direction of the television set, and a front speaker provided on the upper surface of the television set for emitting sound in the horizontal direction and also in the interior of the television set. A reflection type omnidirectional speaker that emits a sound wave having a phase different from that of the sound in the horizontal direction, and a sound wave emitted from the rear part of the reflection type omnidirectional speaker to the inside of the television set is transmitted to the television set. A speaker system for a television set, wherein sound is emitted from a rear cover formed.