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JPH0879659

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH0879659
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker system of a television set, and more particularly to a speaker system of a television set
for the purpose of expanding a reproduction band and reproducing a three-dimensional sound
field.
[0002]
2. Description of the Related Art Generally, the location of speakers in a television set is many
places in the installation space of a cathode ray tube, and is disposed on both sides of the
cathode ray tube screen or on the upper or lower side.
[0003]
In recent years, with the trend toward larger and wider screens, the appearance design of
television sets has also been a trend of slimming, and the form of speakers for reproducing sound
must also be shifted to thinning. It is.
[0004]
However, in the speaker in which the width dimension of the diaphragm is reduced, the bass
reproduction capability is unreasonable also from the viewpoint of the diaphragm area and the
support system of the vibration system. Various methods for arranging a wave tube (also
referred to as a speaker horn) and guiding a sound wave emitted from a diaphragm of a speaker
to a sound radiation opening have been variously developed as a method for slimming a
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television set.
[0005]
However, in the case of the speaker system of such a television set, in order to improve the
performance of the sound radiated from the opening of the acoustic waveguide, pressure
conversion is performed in the acoustic waveguide and in the opening. Since the area of the
sound radiation opening is smaller than the area of the diaphragm of the speaker used, the sound
pressure level radiated from the opening is also reduced, and there is a shortage in the sense of
volume and sound field It is the present condition to do.
[0006]
5 and 6 show a speaker system of a conventional television set.
In FIG. 5, reference numeral 10 is a television set, and in the television set housing 11, left and
right channel speakers 13 and 14 are disposed at left and right positions on both sides of the
cathode ray tube 12, respectively.
The acoustic waveguides 15 and 16 are attached to the front portions of the left and right
channel speakers 13 and 14, respectively, and the sound radiation openings 17 and 18 of the left
and right acoustic waveguides 15 and 16 are television sets. It is disposed near the front panel
(front frame) of the housing 11.
[0007]
In the configuration of FIG. 5, no back cabinet is provided at the rear of the speakers 13 and 14,
and the sound radiated from the rear diaphragm of the speaker is provided around the television
set housing 11. Sound is emitted from the ventilation holes 19 and 20 to the surroundings.
At this time, since the area of the sound radiation openings 17 and 18 is smaller than the
diaphragm area of the speakers 13 and 14 as described above, the sound pressure level radiated
from the sound radiation openings 17 and 18 is reduced. In this state, the sound pressure level
radiated from the rear face of the speaker is higher, and the sound radiated from the ventilation
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holes 19 and 20 to the surroundings masks the sound on the front side from the openings 17
and 18, There are drawbacks such as clear sound quality and deterioration of left and right
stereo separation.
[0008]
Therefore, when emphasis is placed on sound quality, as shown in FIG. 6, back cabinets (left and
right channel speakers 13 and 14 having acoustic waveguides 15 and 16 disposed on the front)
Sealed boxes) 21 and 22 are often provided.
[0009]
However, in the conventional example of FIG. 6, since the back cabinets 21 and 22 are formed in
the limited space of the television set housing 11, the back cabinets 21 and 22 having a large
volume can not be formed.
Therefore, there is a disadvantage that the volume of the back cabinets 21 and 22 limits the bass
reproduction range.
Further, the sound produced from the rear surface of the speakers 13 and 14 is enclosed by the
back cabinets 21 and 22 and is not radiated to the outside, and the sound radiated to the outside
is only from the sound radiation openings 17 and 18 and reproduced. Sound pressure level is
also low.
[0010]
As described above, in the prior art, the sound radiated from the front of the television set is
unclear, and the method of disposing the back cabinet at the rear of the speaker Since a volume
back cabinet can not be configured, there is a problem in that the sound reproduction level is
limited, and the sound pressure level to be reproduced is also low because the rear portion of the
speaker is sealed.
[0011]
Therefore, in view of the above problems, according to the present invention, the sound radiated
from the front and back of the speaker inside the television set does not interfere with each other
to obtain a high definition sound quality, and the reproduction band of the sound is also wide. It
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is an object of the present invention to provide a speaker system of a television set that can
reproduce sounds with excellent presence.
[0012]
SUMMARY OF THE INVENTION The speaker system of the television set according to the
invention of claim 1 comprises a speaker disposed inside the television set, and a speaker
provided on the front of the diaphragm of the speaker. An acoustic waveguide for guiding and
emitting the sound to the front of the television set, and directivity for reflecting the sound
emitted from the rear surface of the speaker diaphragm in a specific direction different from the
front of the television set And a reflecting member.
[0013]
According to a second aspect of the present invention, a speaker system of a television set
comprises a speaker disposed inside the television set, and a sound emitted from the front of the
diaphragm of the speaker in the television set. An acoustic waveguide guiding forward and
radiating, a directional reflecting member reflecting the sound emitted from the rear surface
portion of the speaker diaphragm in a specific direction different from the front of the television
set, and the directional reflecting member And an emission port for emitting the sound reflected
in a specific direction to the outside of the television set.
[0014]
According to a third aspect of the present invention, there is provided a speaker system of a
television set, comprising: a first speaker disposed inside the television set; and a second speaker
disposed inside the television set. The first acoustic waveguide for guiding the sound emitted to
the front of the diaphragm of the first speaker to the front of the television set and emitting the
sound to the front of the diaphragm of the second speaker The second acoustic waveguide for
guiding and emitting the sound to the front of the television set, and the sound emitted from the
rear surface portion of the speaker diaphragm of the first speaker are the front of the television
set A second directional reflector that reflects in a different specific direction, and reflects in a
specific direction different from the front of the television set the sound emitted from the rear
surface portion of the speaker diaphragm of the second speaker Characterized by comprising a
tropism reflecting member.
[0015]
According to a fourth aspect of the present invention, there is provided a speaker system of a
television set, comprising: a first speaker disposed inside the television set; and a second speaker
disposed inside the television set. The first acoustic waveguide for guiding the sound emitted to
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the front of the diaphragm of the first speaker to the front of the television set and emitting the
sound to the front of the diaphragm of the second speaker The second acoustic waveguide for
guiding and emitting the sound to the front of the television set, and the sound emitted from the
rear surface portion of the speaker diaphragm of the first speaker are the front of the television
set A second directional reflector that reflects in a different specific direction, and reflects in a
specific direction different from the front of the television set the sound emitted from the rear
surface portion of the speaker diaphragm of the second speaker A directional reflection member,
a first emission port for emitting a sound reflected in a specific direction by the first directional
reflection member to the outside of the television set, and the second directional reflection
member And a second radiation port for emitting the sound reflected in a specific direction to the
outside of the television set.
[0016]
According to a fifth aspect of the present invention, in the speaker system of the television set
according to the first, second, third or fourth aspect, the directional reflection member emits the
sound emitted from the rear surface portion of the speaker diaphragm. The television set is
characterized in that it is reflected diagonally forward on the side of the television set and
obliquely forward on the side of the top surface.
[0017]
According to a sixth aspect of the present invention, in the speaker system of the television set
according to the first, second, third or fourth aspect, the directional reflection member is
disposed at a position facing the rear surface of the speaker diaphragm. A reflection flat portion
provided to reflect the sound from the rear surface of the diaphragm, and a side shield provided
so as to be connected to one side end of the reflection flat portion to block the propagation of the
sound to one side. A bottom shield provided to be connected to the lower end of the reflection
flat portion to shield the propagation of sound to the bottom side, and the other side and the top
facing the side shield and the bottom shield are provided. It is characterized in that it comprises
an open portion for emitting the sound reflected by the reflection flat portion.
[0018]
According to a seventh aspect of the present invention, in the speaker system of the television set
according to the sixth aspect, the reflection flat portion is a side surface of the television set, the
sound emitted from the rear surface portion of the speaker diaphragm. It is characterized in that
it is reflected obliquely forward on the part side and obliquely forward on the top face side.
[0019]
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According to an eighth aspect of the present invention, in the speaker system of the television set
according to the third or fourth aspect, the first directional reflection member is released from
the rear surface portion of the speaker diaphragm of the first speaker. The sound produced is
reflected diagonally forward on one side of the television set and diagonally forward on the top
side, and the second directional reflection member is the speaker diaphragm of the second
speaker. The sound emitted from the rear surface portion is reflected diagonally in front of the
other side surface portion of the television set and obliquely in front of the top surface portion.
[0020]
According to the first and second aspects of the invention, the acoustic waveguide is disposed on
the front surface of the speaker diaphragm to radiate the sound forward, while the direction is
directed to the rear surface of the speaker diaphragm. A sex reflective member is provided, and
the sound radiated from the rear diaphragm is forced to be reflected in a specific direction (for
example, the side portion direction) of the television set and emitted to the outside of the
television set.
As a result, the sounds on the front and rear surfaces of the speaker diaphragm can be reliably
emitted in the front of the television set and in a different specific direction without interfering
with each other.
[0021]
According to the third and fourth aspects of the present invention, in the television set having the
pair of first and second speakers disposed on the left and right, the first and second front and
rear face portions of the first and second speakers are respectively provided. The first and
second directional reflectors are respectively provided on the rear face portions of the first and
second speakers while the second acoustic waveguide is provided, and the sound of the rear face
portions of the first and second speakers is detected. Since the light is forcibly reflected in a
specific direction (for example, the side surface direction) and emitted to the outside of the
television set, the sounds of the front surface and the rear surface of each speaker diaphragm are
not interfered with each other, and There is also little interference between the left and right
sound waves output from the rear diaphragms of the second speaker, and a sound quality with
high clarity and excellent presence can be obtained.
[0022]
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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, and FIG. 2 is a perspective view showing an arrangement
of speakers for left and right channels in the television set casing of FIG.
The same components as those in the conventional example shown in FIG.
[0023]
In FIG. 1, a television set 10A is provided with a cathode ray tube 12 and speakers 13 and 14 for
left and right channels in the inside of a television set case 11.
The left and right channel speakers 13 and 14 are disposed at left and right positions on both
sides of the cathode ray tube 12 respectively.
The acoustic waveguides 15 and 16 are disposed on the front of the left and right channel
speakers 13 and 14, respectively, and the sound radiation openings 17 and 18 at the ends
thereof are disposed near the front panel of the television case 11 ing.
The sound emitted from the front of each diaphragm of the speakers 13 and 14 is radiated to the
front of the television set housing 11 through the acoustic waveguides 15 and 16.
[0024]
Directional reflection members 23 and 24 are disposed on the rear surface of the left and right
channel speakers 13 and 14, respectively.
The left and right directional reflectors 23 and 24 have a shape in which the sound emitted from
the rear surface portion of each diaphragm of the speakers 13 and 14 is open on one side and
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the upper surface And reflects the light from the open part in a specific direction different from
the front of the television set case 11 (in the figure, obliquely forward on the side of the case and
diagonally forward on the top) .
Sound waves reflected by the left and right directional reflection members 23 and 24 are emitted
from the sound emission ports 30 and 31 formed on the left and right side portions of the
housing 11 to the outside of the housing It has become.
The radiation ports 30 and 31 may also be used as ventilation holes.
[0025]
In such a configuration, the sound radiated from the front surface of the diaphragm of the left
and right channel speakers 13 and 14 passes through the left and right acoustic waveguides 15
and 16, respectively, and the left and right sound radiation openings 17 The light is emitted to
the front of the television set 10 from 18.
At the same time, the sound radiated from the rear surface of the diaphragm of the left and right
channel speakers 13 and 14 is reflected by the reflection surfaces of the left and right directional
reflection members 23 and 24, respectively, and the side surface of the television set housing 11
It is emitted obliquely to the front on the side and obliquely forward on the top surface side, and
is forcibly emitted to the outside from the sound emission ports 30 and 31 in the left and right
side surface portions of the television set housing 11.
Since the reflection surfaces of the left and right directional reflection members 23 and 24 are
directed diagonally forward and obliquely upward of the television set housing 11, the sound
radiated from the rear of each diaphragm is each directional reflection member. The light is
reflected by the reflecting surfaces 23 and 24 and emitted obliquely forward and obliquely
upward. A part of the sound radiated from the rear surface portion of the diaphragm of the
speakers 13 and 14 is reflected on the inner surface of the ceiling surface portion of the housing
11 and emitted from the sound radiation ports 30 and 31 to the outside of the housing.
Therefore, as shown in FIG. 2, the left and right sound waves A and B outputted by the
diaphragm rear surface of each of the left and right channel speakers 13 and 14 are clearly
directional. There is little interference between the left and right sound waves, and the degree of
separation or intelligibility of the left and right voices is improved, the sense of stereo is
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increased, and the sound radiated from the side is reflected by the wall of the room etc. The
effect of increasing the feeling is also obtained.
[0026]
FIG. 3 is an exploded perspective view showing one speaker system (for example, a speaker
system for the right channel) in FIG. 1, and FIG. 4 is a longitudinal sectional view in a state where
FIG. 3 is assembled.
[0027]
In FIG. 3, in the speaker system, an acoustic waveguide 16 is attached to the front of the speaker
14, and a directional reflection member 24 is attached to the rear of the speaker 14.
The acoustic waveguide 16 has a horn portion 16a having a sound radiation opening 18 on the
tip end side and emitting sound waves, and a waveguide portion 16b connected to the horn
portion 16a and guiding the sound wave from the front of the speaker to the horn side And a
mounting portion 16c connected to the rear end of the waveguide portion 16b. The front frame
portion of the speaker 14 is fixed to the mounting portion 16c by a locking means such as a
screw. Further, connecting portions 16c1 and 16c2 are provided so as to project outward at the
rear end of the mounting frame of the mounting portion 16c. The connecting portions 24c1 and
24c2 of the directional reflection member 24 are connected and fixed to the connecting portions
16c1 and 16c2 of the mounting portion 16c by screws 26 and 27, respectively. The connection
portions 24c1 and 24c2 are formed in a bowl shape on the outer periphery of the directional
reflection member 24. The directional reflection member 24 has a reflection flat portion 24 a for
reflecting the sound emitted from the rear surface portion of the speaker 14 with the reflection
surface directed obliquely forward (to the front of the television set) and obliquely upward. A side
shield 24b is connected to the reflection plane 24a and blocks propagation of sound waves to the
center of the television set (that is, the cathode ray tube), and is connected to the reflection plane
24a to the bottom of the television set It is comprised with the bottom face shielding part 24c
which shields that an acoustic wave propagates.
[0028]
When the directional reflection member 24 is fixed to the mounting portion 16c of the acoustic
waveguide 16 by the screws 26, 27, as shown in the longitudinal sectional view of FIG. 4, the
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front diaphragm 14a of the speaker 14 is The acoustic waveguide 16 is disposed at the front of
the speaker, and the directional reflection member 24 is disposed at the rear of the rear
diaphragm 14 b of the speaker 14. In FIG. 4, reference numeral 25 is a sound absorbing material
for preventing resonance to a specific frequency inside the acoustic waveguide 16. A cotton-like
member is used as the sound absorbing material 25.
[0029]
Although FIG. 3 and FIG. 4 show the configuration of the directional reflection member 24 of the
right channel speaker, the directional reflection member 23 of the left channel speaker is
symmetrical with respect to the directional reflection member 24. The configuration is the same
as that of the directional reflection member 24.
[0030]
As described above, according to the present invention, the speaker system for a television
having good clarity, realism and a sense of wideness, and a simple structure and cost advantages.
It is possible to realize
[0031]
Brief description of the drawings
[0032]
1 is a perspective view showing a speaker system of a television set according to an embodiment
of the present invention.
[0033]
2 is a perspective view showing a configuration in which the system of FIG. 1 is modeled.
[0034]
3 is an exploded perspective view of one of the speaker system of FIG.
[0035]
4 is a longitudinal sectional view in the state of FIG. 3 assembled.
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[0036]
5 is a perspective view showing the speaker system of the conventional television set.
[0037]
6 is a perspective view showing a speaker system of another conventional television set.
[0038]
Explanation of sign
[0039]
DESCRIPTION OF SYMBOLS 10A ... Television set 11 ... Television set housing 12 ... Braun tube
13 ... Speaker 14 for left channel ... Speaker 15 for right channel ... Front side acoustic waveguide
16 for left speaker ... Front side acoustic waveguide 17 for right speaker ... Sound emitting
opening 18 of the front side acoustic waveguide for left speaker ... Sound emitting opening 23 of
the front side acoustic waveguide for right speaker ... Directional reflecting member 24 for left
speaker 24 ... Directional reflecting member 30 for right speaker ... Left sound emission port 31
... Right sound emission port
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