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JP2000244845

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Notice
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2000244845
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to
television receivers, and more particularly to the installation of speakers.
[0002]
2. Description of the Related Art Television sound broadcasting is being performed not only by
stereo sound broadcasting but also by various sound broadcasting forms such as bilingual
broadcasting and commentary broadcasting, by making the television sound broadcasting into
stereo. The television receiver receives / reproduces these broadcasts along with the video signal.
The television receiver has at least one pair of left and right speakers for reproducing these audio
broadcasts, and the speakers are embedded and fixed on the left and right of the television
receiver to reproduce audio or the left and right It is a general practice to set up speakers
separately and play audio.
[0003]
[Problems to be Solved by the Invention] When performing stereo reproduction of sound, the
speaker makes sound image localization, movement, depth, etc. by producing different sounds by
the left and right speakers of the volume balance and phase etc of the sound source contained in
the reproduction sound. It creates a sound field that reproduces the three-dimensional effect of
sound.
03-05-2019
1
[0004]
This sound field is greatly affected by the distance, arrangement, orientation, etc. of the left and
right speakers, but in a television receiver that reproduces sound with an embedded type
speaker, the distance between the left and right speakers is the screen size of the television
receiver. In addition to being fixed at relatively narrow intervals from the relationship, the
orientation is also fixed.
Therefore, the so-called sweet spot, which is the optimum sound field, is fixed, and since the user
views in various viewing modes such as the viewing position and the number of viewers, the user
does not necessarily hear the sound at the sweet spot.
[0005]
The sweet spot of a television receiver with embedded speaker is usually at a distance from the
center of the display screen, but it is subjected to electrical processing to make the sweet spot as
wide as possible with an audio signal processing circuit or the like. It is common to do.
[0006]
However, there are cases where the sweet spot may be narrow as in the case of viewing alone,
and in some cases sound quality may be improved by narrowing the sweet pot.
[0007]
In addition, the viewing position of the viewer is not limited to the front of the display screen as
described above, but may be singular or plural, and may be viewed at a position separated on
both sides by holding a table etc. The sweet spot of the sound field of the television receiver and
the viewing position of the viewer do not necessarily coincide, and an improvement is desired.
[0008]
In the above, stereo reproduction was taken as an example, but even in monaural reproduction or
multiplex audio, it is also possible to easily form a sound field according to various viewing
modes such as viewing position, number of people, preference of viewers, etc. It has been desired
as well as the aforementioned stereo sound reproduction.
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[0009]
Also, a television receiver having a type of speaker that is separated and independent from the
main unit faces the speakers and the pair of left and right speaker spacing is relatively free, but
requires an extra area for installation, or the receiver main body There is also an undesirable
aspect such as losing the sense of unity with.
[0010]
In cinemas, etc., a multi-channel system using a large number of speakers has been adopted to
improve sound localization and presence in any viewing position, but it has been effective in
homes, but it has a large installation space and cost. It is difficult to realize from the viewpoint of
power consumption, etc., and it is desirable to improve the sound quality by a pair of left and
right speakers that has been pervading conventionally.
[0011]
The present invention aims to solve the above-mentioned problems.
[0012]
Another object of the present invention is to obtain an optimal sound field.
[0013]
SUMMARY OF THE INVENTION Under such a purpose, in the present invention, the orientation
of the speaker is automatically changed according to the position of the viewer.
[0014]
DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is an external view
of a television receiver to which the present invention is applied, and 1 is a television receiver
and 2 is an image display surface. A panel is used.
Reference numeral 3 is a housing, 4 is a remote control receiver, 5 is a speaker net provided on
the front left and right of the housing 3, 6 is a power switch, and 7 is a knob provided on the left
and right respectively.
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[0015]
The television receiver 1 receives the broadcast program selected by the viewer by wire or
wireless and reproduces the audio and video of the broadcast program, and according to the
program, stereo audio, monaural audio, multiplexed audio such as bilingual broadcasts are
reproduced according to the program It is reproducible.
The audio is reproduced by the speaker inside the speaker net 5 and reaches the viewer through
the speaker net 5.
[0016]
FIG. 2 is a partially enlarged view of the speaker section as seen from the speaker net 5 of the
television receiver 1 of FIG.
[0017]
In the figure, reference numeral 8 is a mid-tone speaker, and 9 is a high-tone speaker, which are
provided on the left and right of the television receiver 1.
Also, 10 is a speaker mounting plate to which the middle and high-tone speakers 8 and 9 are
attached and fixed.
The middle and high-tone speakers 8 and 9 are electrically connected to and controlled by an
audio control circuit inside the television receiver 1 (not shown) to perform audio output.
The speaker mounting plate 10 is rotatably mounted on a housing 3 of the television receiver 1.
[0018]
FIG. 3 is a partial view of the speaker mounting plate 10.
[0019]
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In the figure, reference numeral 12 is a substantially cylindrical polyurethane rubber with a
flange having a through hole at its central portion and is inserted into the hole 10-a of the
speaker mounting plate 10 as shown by the arrow in the figure to become a keyway The
combination of the convex and the concave prevents the polyurethane rubber 12 from rotating
with respect to the speaker mounting plate 10, that is, has an integral structure.
[0020]
FIG. 4 is a cross-sectional view and a partially enlarged view of a portion that passes through the
rotation center including the housing 3.
Here, reference numeral 11 denotes a shaft, which is fixed to the housing 3 and penetrates the
through hole of the polyurethane rubber 12 mounted in the hole 10-a serving as the rotation
center of the speaker mounting plate 10.
Therefore, the housing 3 and the speaker mounting plate 10 can be relatively rotated around the
shaft 11, and while fixed to the speaker mounting plate 10, the high sound speakers 8 and 9 can
also be simultaneously rotated.
[0021]
It is possible to change the direction of these speakers from the outside by moving the knob 7
left and right.
Here, the orientation of the loudspeaker directed to the desired orientation must be maintained.
As shown in the figure, a screw thread is formed in the base portion of the shaft 11 and the
mounting hole of the housing 3 and the housing 3 and the shaft 11 are screwed into the
mounting hole 3-a of the housing 3 by screwing. It is integrated.
Further, no thread is provided at a portion where the shaft 11 of the polyurethane rubber 12 is
in contact.
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Here, since the through hole 12-a of the polyurethane rubber 12 is configured to be slightly
smaller in diameter than the shaft diameter of the shaft 11, the shaft 11 is press-fitted to the
polyurethane rubber 12.
[0022]
By doing this, when the speaker mounting plate 10 rotates around the shaft 11, the shaft 11, the
housing 3, the speaker mounting plate 10, and the polyurethane rubber 12 relatively rotate, but
as described above Since the shaft 11 is press-fit into the polyurethane rubber 12, a frictional
force is generated between the shaft 11 and the polyurethane rubber 12, and this causes a
resistance when it is attempted to rotate the speaker mounting plate 10 around the shaft 11. It
occurs.
Accordingly, when an external force exceeding the rotational torque is not applied, the positional
relationship between the housing 3 and the speaker mounting plate 10 is maintained. That is, the
orientation of the speaker can be maintained.
[0023]
The rotational torque can be set relatively easily by the relationship between the shaft diameter
and the hole diameter, the insertion length of the shaft into the polyurethane rubber, etc. The
shaft diameter and the hole diameter may be determined according to the desired torque value.
[0024]
Furthermore, since the polyurethane rubber 12 has a flange 12-b and is sandwiched between the
housing 3 and the speaker mounting plate 10, the housing 3 and the speaker mounting plate 10
can be rotated without being in contact with each other.
Since the speakers 9 and 8 vibrate to perform sound output, the speaker mounting plate 10 also
vibrates, and unnecessary vibration may be generated by unnecessary vibration at contacts such
as the rotation part, but 12 is polyurethane rubber. Therefore, it is possible to absorb such a
vibration and to simultaneously realize the prevention of the generation of chattering noise and
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the like in the rotation shaft portion.
[0025]
As described above, according to the present embodiment, it is possible to change the direction
of the speakers of the television receiver independently of one another, so a sound field suitable
for various viewing modes such as the preference, position, and number of viewers can be
obtained. It became easy to get.
[0026]
Therefore, for example, the direction of the speaker is adjusted so that the sweet spot of stereo
sound in the case of one viewer is matched with the viewing position of the one viewer, and highquality sound enjoys the sound and the sweet spot It is possible to adjust the direction of the
speaker in the wide direction and enjoy the sound.
Such adjustment works effectively not only for stereo sound but also for mono sound.
[0027]
For example, when the broadcast is a monaural broadcast and the table 13 is placed on the front
of the television receiver 1 as shown in FIG. 5 and the viewer is positioned on both left and right
sides, each viewing position can be obtained by rotating the speaker. The speaker can be turned
in the direction of, making it easy to hear the direct sound from the speaker. In addition, even in
bilingual broadcasts, for example, people who want to view in Japanese on the right and people
who want to view in English on the left can point the speakers in their respective directions, so
the volume can be reduced. The mixing of the left and right speaker sounds can be minimized.
[0028]
That is, it is possible not only to avoid unnecessary volume increase due to front-viewingoriented speaker placement as in the past, but also to avoid obstacles in front of the speaker due
to furniture placement etc. It becomes possible to change the direction of the speaker, and it
becomes easy to adjust the sound field according to various viewing forms.
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[0029]
Second Embodiment FIG. 6 is a view for explaining a second embodiment of the present
invention.
[0030]
In the figure, 21 is a television receiver, 22 is an image display surface, 23 is a television housing,
24 wave remote control receiver, 25 is a speaker housing provided on the front left and right of
the television housing 3 It is an enclosure and has a speaker which becomes a sound source (not
shown) inside.
[0031]
Further, the audio output of the speaker is controlled by the audio control circuit of the television
receiver 21 as in the embodiment described above.
[0032]
A grip 26 is integrated with the enclosure 25.
The enclosure 25 has a cylindrical shape as shown in the figure, and is rotatably mounted on the
television housing 23 in the same manner as the above embodiment.
The enclosure 25 has a cylindrical shape, but has a rotation axis at the center of a circle and
rotates.
The structure of the rotation shaft portion is equivalent to that described in the above
embodiment, and the viewer can change the direction of the enclosure 25 by operating the grip
portion 26. However, the enclosure 25 has a cylindrical shape. Therefore, the enclosure 25 itself
can be rotated without compromising the design of the television receiver.
[0033]
Further, as shown in FIG. 7, by providing two volumes 27 for adjusting the left and right speaker
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volumes independently and individually, if the left and right speaker volumes can be adjusted
individually, finer sound field adjustment is possible. It will be possible.
The same effect can also be obtained by adjusting the balance of the left and right speakers
instead of the two volumes.
[0034]
Third Embodiment A third embodiment of the present invention will be described with reference
to FIG.
[0035]
Reference numeral 31 denotes a human body sensor, reference numeral 32 denotes a distance
sensor, and the other reference numerals conform to those of the second embodiment.
Furthermore, the television receiver 21 internally has a sensor control circuit that predicts and
calculates an optimal sound field based on the signals from the human body sensor 31 and the
distance sensor 32, and a stepping motor and sensor control circuit for changing the direction of
the speaker. And the motor control circuit for driving the motor to change the direction of the
speaker according to the calculation result of, the enclosure 25 is rotated by transmitting the
motor drive to the substantially cylindrical enclosure 25 having the speaker inside, and the
direction of the speaker change.
[0036]
The human body sensor 31 captures changes in infrared rays emitted from the body temperature
of the human body with a pyroelectric element, and detects the arrangement and distribution
direction of the viewer. Next, the distance to the viewer in the direction detected by the human
body sensor 31 is measured by the distance sensor 32. The distance sensor may use an
autofocus technology of a camera or the like.
[0037]
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Based on the information from the human body sensor 31 and the distance sensor 32, the sensor
control circuit calculates the position, range, etc. where the sweet spot should be formed from
the distribution, position, distance, etc. of the viewer, and determines the volume balance and
direction of the left and right speakers. . At the same time as adjusting the volume by the voice
control circuit according to the calculated value of the volume balance determined in this
manner, the motor control circuit drives the stepping motor to change the direction of the
speaker according to the direction determination value of the speaker.
[0038]
As described above, according to the present embodiment, the television receiver automatically
adjusts the sound field so that the viewer can always view in the optimum sound field only by the
viewer being at the viewing position without adjusting it. Have the effect of
[0039]
Further, it is needless to say that if the left, right speaker orientation, volume, balance, etc. can be
adjusted by remote control operation, the viewer can adjust the desired sound field at the
viewing position, and the same effect can be obtained.
[0040]
As described above, according to the present invention, it is possible to obtain an optimum sound
field according to the position of the viewer.
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