JP2000244845A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the best sound field corresponding to the position of a viewer by automatically changing the direction of a speaker according to the position of the viewer. SOLUTION: A shaft 11 is fixed to a housing 3 and penetrates the through hole of polyurethane rubber 12 mounted on a hole 10-a as the center of rotation of a speaker fitting plate 10. Consequently, the housing 3 and the speaker fitting plate 10 are able to turn relatively on the shaft 11 and then the tweeter and squawker speakers 8 and 9 can be turned at the same time. Then those speakers 8 and 9 can be changed in direction by moving a knob 7 to the right or left from the outside and when an external force exceeding the turning torque is not applied, the position relation between the housing 3 and speaker fitting plate 10 is held, thereby holding the directions of the speakers 8 and 9. Thus, the directions of the speakers 8 and 9 can be changed, so sound fields matching various audience styles based upon the taste, positions, numbers, etc., of viewers can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to a speaker installation.

[0002]

2. Description of the Related Art With the conversion of television audio broadcasting into stereo, television audio is broadcast not only in stereo audio but also in various audio broadcasting formats such as bilingual broadcasting and commentary broadcasting. The television receiver receives / reproduces these broadcasts together with video signals. The television receiver has at least one set of speakers on the left and right to reproduce these audio broadcasts, and the speakers are embedded and fixed on the left and right sides of the television receiver, and reproduce the audio or perform the reproduction on the left and right. It is general to reproduce sound by installing speakers separately.

[0003]

When performing stereo reproduction of sound, the speakers output sound with different volume balance and phase of the sound source included in the reproduced sound between the left and right speakers, so that sound image localization, movement, depth, and the like are obtained. The sound field reproduces the three-dimensional effect of the sound.

The sound field is greatly affected by the distance, arrangement, orientation, and the like of the left and right speakers. However, in a television receiver that reproduces sound using embedded speakers, the distance between the left and right speakers is determined by the screen of the television receiver. In addition to being fixed at a relatively narrow interval due to the relationship with the size, the orientation is also fixed. Therefore, the so-called sweet spot, which is the optimum sound field, is fixed, and is viewed in various viewing modes such as the viewing position and the number of viewers, so that the sound is not always heard at the sweet spot.

The sweet spot of a television receiver with a built-in speaker is usually located at a certain distance from the center of the display screen. Is generally performed.

[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.

Further, as described above, the viewing position of the viewer is not limited to the front of the display screen, but may be singular or plural, and may be viewed at a position divided on both sides of a table or the like. Therefore, the sweet spot in the sound field of the television receiver does not always match the viewing position of the viewer, and improvement has been desired.

In the above, the case of stereo reproduction is taken as an example.
It has been desired that even in the case of monaural reproduction or multiplexed sound, it is possible to easily form a sound field according to various viewing modes such as the viewing position, the number of people, and the taste of the viewer, as in the case of the above-described stereo sound reproduction.

In a television receiver having speakers of a type separated and independent from the main body, the orientation of the speakers and the spacing between a pair of left and right speakers are relatively free, but an extra area for installation is required. There are also unfavorable aspects such as a loss of unity with the receiver main body.

In a movie theater or the like, a multi-channel system using a large number of speakers has been adopted in order to prevent loss of sound image localization and presence at any viewing position, but the effect is improved. It is difficult to realize this in terms of space, cost, power consumption, and the like, and it is desired to improve sound quality by a pair of left and right speakers that has been infiltrated conventionally.

An object of the present invention is to solve the above-mentioned problems.

Another object of the present invention is to obtain an optimum sound field.

[0013]

For such a purpose, in the present invention, the direction 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, wherein 1 is a television receiver, 2 is an image display surface, and a CRT or liquid crystal. Panels are used. 3 is a housing, 4 is a remote control receiving unit,
5 is a speaker net provided on the front left and right of the housing 3,
Reference numeral 6 denotes a power switch, and 7 denotes knobs provided on the left and right sides.

The television receiver 1 receives a broadcast program selected by a viewer through a cable or wirelessly and reproduces audio and video of the broadcast program, and reproduces audio such as stereo audio, monaural audio, bilingual broadcast, etc. according to the program. Multiple voices can be played. Audio is speaker net 5
Is reproduced by the speaker inside the speaker and reaches the viewer through the speaker net 5.

FIG. 2 is a partially enlarged view of the speaker portion of the television receiver 1 shown in FIG. 1 except for the speaker net 5.

In FIG. 1, reference numeral 8 denotes a middle-tone speaker, and 9 denotes a high-tone speaker, which are provided on the left and right sides of the television receiver 1. Also, 10 is a medium and high frequency speaker 8-,
A speaker mounting plate 9 is mounted and fixed. The middle and high treble speakers 8 and 9 are electrically connected to and controlled by a sound control circuit inside the television receiver 1 (not shown) to output sound. Speaker mounting plate 10
Is rotatably attached to the housing 3 of the television receiver 1.

FIG. 3 is a partial view of the speaker mounting plate 10.

In the figure, reference numeral 12 denotes a substantially cylindrical polyurethane rubber having a flange having a through hole in the center, and is inserted into a hole 10-a of the speaker mounting plate 10 as shown by an arrow in the figure, and a key. The polyurethane rubber 12 does not rotate with respect to the speaker mounting plate 10 due to the combination of the convex and concave grooves.

FIG. 4 is a sectional view and a partially enlarged view of a portion passing through the center of rotation including the housing 3. Here, reference numeral 11 denotes a shaft, which is fixed to the housing 3 and penetrates through the through hole of the polyurethane rubber 12 attached to 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 are relatively rotatable about the shaft 11, and the high-frequency speakers 8 and 9 are also rotatable while being fixed to the speaker mounting plate 10.

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 a desired orientation must be maintained. Axis 1 as shown
Threads are formed in the root portion of the housing 1 and the mounting hole of the housing 3, and the housing 3 and the shaft 11 are integrated by screwing the shaft 11 into the mounting hole 3-a of the housing 3. No thread is provided at the portion of the polyurethane rubber 12 where the shaft 11 contacts. 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 pressed into the polyurethane rubber 12.

In this way, when the speaker mounting plate 10 rotates around the shaft 11, the shaft 11 and the housing 3
And the speaker mounting plate 10 and the polyurethane rubber 12 rotate relative to each other. As described above, since the shaft 11 is press-fitted into the polyurethane rubber 12, a frictional force is generated between the shaft 11 and the polyurethane rubber 12. When the speaker mounting plate 10 is rotated around the axis 11, a rotational torque is generated that causes a resistance. Therefore, when no external force exceeding the rotational torque is applied, the positional relationship between the housing 3 and the speaker mounting plate 10 is maintained. That is, the direction of the speaker can be maintained.

The rotational torque can be set relatively easily by the relationship between the shaft diameter and the hole diameter, the length of insertion of the shaft into the polyurethane rubber, and the like. If the shaft diameter and the hole diameter are determined according to the desired torque value, good.

Further, the polyurethane rubber 12 has a collar 12-
The housing 3 and the speaker mounting plate 10 are sandwiched between the housing 3 and the speaker mounting plate 10, so that the housing 3 and the speaker mounting plate 10 can rotate without contacting each other. Since the speakers 9 and 8 vibrate to output sound, the speaker mounting plate 1
0 also vibrates, and chattering noise may be generated by unnecessary vibrations at the contact point of the rotating part or the like. However, since 12 is polyurethane rubber, it is possible to absorb such vibrations. At the same time, it is possible to prevent chattering noise from being generated at the shaft.

As described above, according to this embodiment, the directions of the speakers of the television receiver can be changed independently of each other, so that the present invention is suitable for various viewing modes such as preference, position, and number of viewers. It became easier to get a sound field.

Therefore, for example, in the case of enjoying a sound with high sound quality by adjusting the direction of the speaker so that the sweet spot of the stereo sound in the case of one viewer is adjusted to the viewing position of the one viewer, and viewing by a plurality of persons, It is possible to enjoy the sound by adjusting the speaker orientation in the direction in which the sweet spot becomes wider. Such adjustment works effectively not only for stereo sound but also for monaural sound.

For example, when the broadcast is a monaural broadcast, and the table 13 is placed in front of the television receiver 1 as shown in FIG. Of the speaker can be directed to the direction of the listening position of the speaker, and it becomes easy to hear the direct sound from the speaker. Also, in bilingual broadcasts, for example, if a person who wants to watch Japanese in the right side and a person who wants to watch English in the left side, the speakers can be turned in each direction, so the volume can be suppressed. Therefore, the mixture of left and right speaker sounds can be minimized.

That is, it is possible not only to avoid an unnecessary increase in volume due to the speaker arrangement that emphasizes frontal viewing as in the related art, but also to a case where there is an obstacle in front of the speaker due to furniture arrangement and the like. It is possible to change the direction of the speaker in a direction to avoid the sound field, and it becomes easy to adjust the sound field according to various viewing modes.

(Second Embodiment) FIG. 6 is a view for explaining a second embodiment of the present invention.

In the figure, reference numeral 21 denotes a television receiver,
Reference numeral 22 denotes an image display surface, 23 denotes a television housing, a 24-wave remote control receiving unit, 25 denotes an enclosure which is a speaker housing provided on the front left and right sides of the television housing 3 and has a sound source (not shown) inside. Speaker.

The sound output of the speaker is controlled by the sound control circuit of the television receiver 21 as in the above-described embodiment.

Reference numeral 26 denotes a grip unit integrated with the enclosure 25. The enclosure 25 has a cylindrical shape as shown in the figure, and is rotatably attached to the television housing 23 in the same manner as in the above-described embodiment. Although the enclosure 25 has a columnar shape, it has a rotating shaft at the center of the circle and rotates. The structure of the rotating shaft portion is the same as that described in the above-described embodiment, and the viewer uses the grip portion 2.
By manipulating 6, the direction of the enclosure 25 can be changed, but since the enclosure 25 has a cylindrical shape, the enclosure 25 itself can be rotated without impairing the design of the television receiver.

Further, as shown in FIG. 7, the volume 27 for independently adjusting the left and right speaker volumes independently is set to two.
If the left and right speaker volumes can be individually adjusted by providing the microphones, finer adjustment of the sound field becomes possible. Also 2
The same effect can be obtained by equipping the balance of the left and right speakers instead of the volume.

(Third Embodiment) A third embodiment of the present invention will be described with reference to FIG.

Reference numeral 31 denotes a human body sensor, 32 denotes a distance sensor, and the other reference numerals correspond to those in the second embodiment. Further, the television receiver 21 includes a sensor control circuit for predicting and calculating an optimal sound field based on signals from the human body sensor 31 and the distance sensor 32, a stepping motor and a sensor control circuit for changing the direction of the speaker. A motor control circuit for driving a motor for changing the direction of the speaker according to the calculation result of the above, and a substantially cylindrical enclosure 25 having the speaker inside for driving the motor.
To rotate the enclosure 25 to change the direction of the speaker.

The human body sensor 31 detects a change 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 human body sensor 31 is detected by the distance sensor 32.
Measure the distance to the viewer in the direction detected in. The distance sensor may use an autofocus technique of a camera or the like.

Based on the information of the human body sensor 31 and the distance sensor 32, the position, range, and the like where a sweet spot is to be formed are calculated by the sensor control circuit from the distribution, position, distance, etc. of the audience, and the volume balance and direction of the left and right speakers. To determine. The sound control circuit adjusts the volume according to the calculated value of the volume balance determined in this way, and at the same time, the motor control circuit drives the stepping motor to change the direction of the speaker according to the determined direction of the speaker.

As described above, according to the present embodiment, the television receiver automatically adjusts the sound field only when the viewer comes to the viewing position without adjusting the sound field, and the viewer always has the optimum sound field. Has the effect that it can be viewed.

If the direction of the left and right speakers, the volume, the balance, and the like can be adjusted by operating the remote controller, the viewer can adjust the desired sound field at the viewing position, and the same effect can be obtained. Absent.

[0040]

As described above, according to the present invention,
It is possible to obtain an optimal sound field according to the position of the viewer.

[Brief description of the drawings]

FIG. 1 is an external view of a television receiver to which the present invention is applied.

FIG. 2 is a diagram showing a configuration of a main part near a speaker of the apparatus of FIG. 1;

FIG. 3 is a partial view of a speaker mounting plate.

FIG. 4 is a sectional view of the apparatus of FIG. 1;

FIG. 5 is a diagram showing the apparatus of FIG. 1 and a position of a viewer.

FIG. 6 is an external view of another television receiver to which the present invention is applied.

FIG. 7 is an external view of another television receiver to which the present invention is applied.

FIG. 8 is an external view of another television receiver to which the present invention is applied.

Claims (4)

[Claims] 1. A television receiver, wherein the direction of a speaker is automatically changed according to the position of a viewer. 2. The television receiver according to claim 1, wherein the direction of the speaker is changed independently of the apparatus main body. 3. The television receiver according to claim 1, further comprising a plurality of said speakers, wherein directions of said plurality of speakers are independently changed. 4. The television receiver according to claim 1, wherein the volume of the speaker is automatically set according to the position of the viewer.