JP4683593B2 - Image display apparatus and control method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an image display device used together with a speaker andIts controlIt is about the method.
[0002]
[Prior art]
Conventionally, in an image display device such as a TV receiver or a monitor, a dedicated speaker is arranged for each of left-side sound (L-ch) and right-side sound (R-ch) in order to reproduce stereo sound, and sound signals are reproduced. ing. These L-ch and R-ch playback speakers are built in on the left and right sides of the image display device, or, as an option, include dedicated speakers that are directly attached to the left and right sides of the image display device.
[0003]
On the other hand, in order to perform high-quality so-called Hi-Fi playback, a large speaker separate from the image display apparatus may be installed. However, in this case, if the distance between both the L-ch and R-ch speakers is too wide, there is an adverse effect that the dialogue or the like is difficult to be localized at the center when a movie or the like is reproduced. In order to solve this problem, there are many cases where a speaker called a center speaker, which mainly reproduces a human voice band sound (C-ch), is arranged at the upper part or the lower part of the image display device.
[0004]
At this time, if it is an image display device using a CRT, the size of the device has a sufficient depth, and such a center speaker can be used on the top of the housing of the image display device. Can be installed directly on the lower floor.
[0005]
[Problems to be solved by the invention]
However, in the case of an image display device using a thin display panel such as a liquid crystal display, PDP, or SED, the depth is at most about 10 cm. L-ch and R-ch speakers are prepared according to the thickness of the image display apparatus using such a thin display panel, but a center speaker used for these is not particularly prepared. Therefore, it is impossible to place a separate center speaker having a depth on top of these thin image display devices, and when installed on the lower floor surface, the image display device is thin, so it takes up a lot of space. I can not take advantage of the benefits.
[0006]
Further, when a thin image display device is installed on a wall surface as a “wall-mounted TV”, it is aesthetically pleasing to have a signal line for the center speaker.
[0007]
  The present invention has been made in view of the above-described conventional example, and allows the speaker to be directly attached to either the left or right or the upper (lower) of the image display apparatus main body, and depending on the position of the speaker, An image display device capable of controlling an acoustic signal supplied to each speaker; andIts controlIt aims to provide a method.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, the image display apparatus of the present invention has the following configuration. That is,
  An image display device to which a speaker can be attached,
  The speakers can be attached one by one to the left and right sides of the image display device, and two speakers can be attached to the upper side or the lower side of the image display device. When attached to the upper or lower side of the image display device, the combined length of the two speakers corresponds to the horizontal width of the image display device, and the speakers are attached to both the left and right sides of the image display device. Further, a gap filling member for making up the difference between the vertical width of the image display device and the length of the speaker has a structure that can be attached to both the left and right sides of the image display device,
  Center channel acoustic signal, right channel acoustic signal and left channel acoustic signal are input from an external signal source,
  At least one of the speakers is attached to an upper side or a lower side of the image display device, or2Detecting means for detecting whether the two speakers are attached to the left and right sides of the image display device;
  If the detecting means detects that at least one speaker is attached to the upper side or the lower side of the image display device,Input from the external signal sourceCenter channel acoustic signalTo the speakerSupplyBy the detection meansWhen it is detected that the two speakers are attached to the left and right sides of the image display device,Input from the external signal sourceSupply means for supplying a right channel sound signal and a left channel sound signal to the corresponding speakers, respectively.
[0010]
  In order to achieve the above object, a method for controlling an image display apparatus according to the present invention includes the following steps. That is,
  A method of controlling an image display device to which a speaker can be attached,
  The speakers can be attached one by one to the left and right sides of the image display device, and two speakers can be attached to the upper side or the lower side of the image display device. When attached to the upper or lower side of the image display device, the combined length of the two speakers corresponds to the horizontal width of the image display device, and the speakers are attached to both the left and right sides of the image display device. Further, a gap filling member for making up the difference between the vertical width of the image display device and the length of the speaker has a structure that can be attached to both the left and right sides of the image display device,
  Center channel acoustic signal, right channel acoustic signal and left channel acoustic signal are input from an external signal source,
  At least one of the speakers is attached to an upper side or a lower side of the image display device, or2A detection step of detecting whether the two speakers are attached to the left and right sides of the image display device;
  When it is detected by the detection step that at least one of the speakers is attached to the upper side or the lower side of the image display device,Input from the external signal sourceCenter channel acoustic signalTo the speakerSupplyBy the detection meansWhen it is detected that the two speakers are attached to the left and right sides of the image display device,Input from the external signal sourceAnd supplying a right channel acoustic signal and a left channel acoustic signal to the corresponding speakers.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
[0013]
[Embodiment 1]
FIG. 1 is a diagram showing an arrangement example of an image display device and dedicated speakers according to an embodiment of the present invention.
[0014]
In the figure, reference numeral 1 denotes an image display apparatus main body. 2 is a dedicated speaker for the left channel, and 3 is a dedicated speaker for the right channel. 20 is a left side gap filling member, and 30 is a right side gap filling member. FIG. 5A shows a state in which dedicated speakers 2 and 3 for the left channel and the right channel are attached to both sides of the image display device main body 1 to output L-ch and R-ch sounds, respectively. . FIG. 1B shows a state in which both dedicated speakers 2 and 3 are attached to the lower side of the image display device body 1 and used as a center speaker to output C-ch sound.
[0015]
Here, as shown in FIG. 1A, when the dedicated speakers 2 and 3 are attached to both sides of the image display device main body 1, respectively, the difference in height between the image display device main body 1 and the dedicated speakers 2 and 3 is determined. In order to match, the gap filling members 20 and 30 for the side surfaces are used, and the heights of the image display device main body 1 and the dedicated speakers 2 and 3 are made to coincide in appearance.
[0016]
Also in FIG. 1B, the combined length of the two speakers 2 and 3 corresponds to the horizontal width of the image display device 1.
[0017]
FIG. 2 shows a state in which separate external speakers 81 and 82 are arranged as left and right channel dedicated speakers when the dedicated speakers 2 and 3 are used as center speakers, as shown in FIG. The external speakers 81 and 82 receive L-ch and R-ch acoustic signals from an external controller, which is a signal source (not shown), respectively.
[0018]
FIG. 3 is a block diagram showing the configuration of the speaker drive circuit according to the first embodiment, which is drawn focusing on only the flow of the acoustic signal.
[0019]
In the figure, reference numerals 1, 2, 3 and 81, 82 denote the image display device main body, left channel and right channel dedicated speakers, and external speakers, respectively, as in FIGS. Reference numeral 4 denotes an external controller that supplies video and audio signals to the image display apparatus main body and performs control. Reference numeral 5 denotes an external amplifier that drives the external speakers 82 and 83. 11 is a speaker attachment position detection unit, 12 is a power amplifier for driving the dedicated speakers 2 and 3, 13 is an acoustic signal switching unit, 14 is a CPU that controls the image display apparatus main body 1, and 15 is a program executed by the CPU 14. And a memory for storing various data. 41 is an attenuator which is a first volume setting unit for adjusting the volume of a dedicated speaker, 42 is an attenuator which is a second volume setting unit for adjusting the volume of an external speaker, and 43 is a centralized control of the volume of all speakers. Master volumes 52 and 53 are power amplifiers for driving external speakers.
[0020]
The speaker attachment position detection unit 11 detects whether the dedicated speakers 2 and 3 are attached to both sides of the image display device body 1 or attached to the lower side of the image display device body 1 and used as a center speaker. Then, the CPU 14 controls the acoustic signal switching unit 13 based on the detection result to switch the acoustic signal input to the power amplifier 12. When the speaker attachment position detection unit 11 detects that the dedicated speakers 2 and 3 are attached to the lower side of the image display device body 1, the speaker attachment position detection unit 11 supplies a C-ch acoustic signal to the power amplifier 12, and the L-ch And R-ch sound are reproduced from the external amplifier 5 and the external speakers 82 and 83.
[0021]
The attenuators 41 and 42 are for adjusting the balance between the dedicated speakers 2 and 3 and the external speakers 82 and 83, and the total volume of both the attenuators 41 and 42 is centrally controlled by the master volume 43.
[0022]
Further, when the dedicated speakers 2 and 3 are attached to the left and right sides of the image display device main body 1, the speaker attachment position detector 11 has the dedicated speakers 2 and 3 attached to the lower side of the image display device main body 1. And L-ch and R-ch sounds are supplied to the dedicated speakers 2 and 3, respectively. At this time, the external amplifier 5 and the external speakers 82 and 83 are not particularly required.
[0023]
FIG. 4 is a flowchart showing a control process performed by the CPU 14 of the image display apparatus 1 according to the present embodiment. A control program for executing this process is stored in the memory 15.
[0024]
In the flowchart of FIG. 4, first, processing is started in step S <b> 101, then the process proceeds to step S <b> 102, and the dedicated speakers 2 and 3 are connected to the main body of the image display device 1 based on the detection result input from the speaker attachment position detection unit 11. It is determined whether it is attached to both sides of the image display device 1 or attached to the lower part of the image display device 1 and used as a center speaker. If it is attached to both sides, the process proceeds to step S103, and L-ch and R-ch sounds are supplied to the dedicated speakers 2 and 3, respectively.
[0025]
On the other hand, if it is attached to the lower part of the image display device 1 and used as a center speaker in step S102, the process proceeds to step S104, where the C-ch acoustic signal is supplied to the power amplifier 12, and the L-ch and R- The sound of ch is supplied to the external amplifier 5. Thereby, the sound of the left and right channels is reproduced from the external speakers 82 and 83.
[0026]
Next, the speaker attachment position detection unit 11 according to the present embodiment will be described.
[0027]
FIG. 5 is a cross-sectional view of a fixing portion for attaching the dedicated dedicated speakers 2 and 3 according to the present embodiment to the lower side of the image display device body 1. In the figure, the upper side of the dotted line drawn horizontally in the center shows the main body of the image display device 1, and the lower side shows the dedicated speakers 2 and 3.
[0028]
In the figure, reference numeral 100 denotes a housing portion of the image display device 1. Each of 111, 112, 113, and 114 constitutes the speaker attachment position detection unit 11 according to the present embodiment, 111 is an output terminal that outputs a detection result of the speaker attachment position, and 112 is also a first electrode. A nut 113 is a second electrode / nut, and 114 is a pull-up resistor. Reference numeral 201 denotes a housing portion of the speakers 2 and 3, and 202 and 203 denote fixing bolts for the dedicated speakers 2 and 3.
[0029]
Among these, the first and second electrode / nuts 112 and 113, the casing portion 201 of the speakers 2 and 3, and the dedicated speaker fixing bolts 202 and 203 are conductive members such as metal. The first and second electrode / nuts 112 and 113 are fixed so as to be embedded in the casing 100 of the image display device 1 made of plastics resin.
[0030]
The first electrode / nut 112 is connected to the GND, and the second electrode / nut 113 is connected to the 5V power line via the pull-up resistor 114 and outputs the detection result of the speaker mounting position. The output terminal 111 is connected.
[0031]
In this state, when the dedicated speakers 2 and 3 are not attached to the lower part of the image display device 1, the second electrode / nut 113 is pulled up to the 5V power line by the pull-up resistor 114, so that it is connected to the output terminal 111. Outputs a high level (5 V) signal. When the dedicated speakers 2 and 3 are attached at this position, the second electrode / nut 113 is electrically connected to the first electrode / nut 112 by the dedicated speaker fixing bolts 202 and 203 and the housing 201 of the dedicated speaker. Connected to. For this reason, a low level (0 V) signal is output to the output terminal 111 that outputs the detection result of the speaker mounting position. The CPU 15 checks whether the output signal from the output terminal 111 is high level or low level, so that the dedicated speakers 2 and 3 are attached to both the left and right sides of the image display device 1 or the lower part thereof. Can be determined.
[0032]
Here, the speaker mounting position detection unit 11 has been described as being disposed at the lower speaker mounting position of the image display device main body 1. However, even if the speaker mounting position detection unit 11 is disposed at both side mounting positions of the image display device 1, the speaker mounting position is not limited. It goes without saying that the same effect can be obtained simply by reversing the polarity of the detection result.
[0033]
In addition, the speaker attachment position detection unit 11 may be disposed on only one of the two dedicated speakers 2 to 3. Furthermore, when the dedicated speakers 2 and 3 are used as the center speaker, they may be attached to the upper side instead of the lower side of the main body of the image display device 1.
[0034]
Next, the dedicated speakers 2 and 3 will be described.
[0035]
FIG. 6 is a diagram showing the arrangement of the speaker units of the dedicated speakers 2 and 3. FIG. 6A is a diagram in which the dedicated speakers 2 and 3 are attached to both sides of the image display device 1 and L-ch and R-ch sounds are heard. The direction when outputting is shown. Moreover, (b) represents the direction when it is attached to the lower side of the main body of the image display device 1 and used as a center speaker.
[0036]
In the figure, 21 and 31 are fixed portions of the dedicated speakers 2 and 3, respectively, 22, 23, 32 and 33 are mid-low range reproduction speaker units (woofers), and 24 and 34 are high range reproduction speaker units (tweeters). is there.
[0037]
The dedicated speakers 2 and 3 include tweeters 24 and 34 that mainly reproduce the high sound range, and a woofer that mainly reproduces the middle and low range, and reproduces each of the divided bands.
[0038]
When the dedicated speakers 2 and 3 are attached to both sides of the main body of the image display apparatus 1 to output L-ch and R-ch sounds, as shown in FIG. It arrange | positions so that 34 may come upwards, and it arrange | positions so that a high region source may come to a high position, and it has a stereo feeling.
[0039]
On the other hand, when attached to the lower side of the image display apparatus 1 and used as a center speaker as shown in FIG. 6B, the tweeters 24 and 34 are arranged so as to be located on the inner side, and the high sound source is localized at the center position. Like that.
[0040]
[Embodiment 2]
FIG. 7 is a block diagram showing a circuit configuration of the image display apparatus according to Embodiment 2 of the present invention. In FIG. 7, similar to FIG. 3 in the first embodiment described above, the drawing is focused on only the flow of the acoustic signal, and the same number is assigned to those having the same function as in FIG. 3. is there. Further, the portions related to the external amplifier 5 and the external speakers 82 and 83 are omitted because they are the same as those in FIG. 3 in the first embodiment.
[0041]
In FIG. 7, reference numeral 16 denotes a center channel sound reproduction block which mixes L-ch and R-ch sound signals at a ratio of 1: 1 and limits the band. This cuts signals below several hundreds of Hz and above several KHz, extracts only the band corresponding to human voice, and makes it a C-ch signal, thereby reducing the influence on the stereo effect of music, sound effects, etc. It is to do.
[0042]
As described above, in the first embodiment, all the acoustic signals of L-ch / R-ch and C-ch are input from the external controller 4, whereas in the second embodiment, the external controller 4, only an L-ch / R-ch acoustic signal is input, and a C-ch signal is generated inside the image display apparatus 1.
[0043]
[Embodiment 3]
FIG. 8 is a block diagram showing a configuration of an image display apparatus according to Embodiment 3 of the present invention. Here, similarly to FIG. 3 in the first embodiment described above, only the flow of the acoustic signal is drawn, and the same number is assigned to those having the same function as in FIG. Further, the portions related to the external amplifier 5 and the external speakers 82 and 83 are omitted because they are the same as those in FIG. 3 in the first embodiment.
[0044]
In the first embodiment described above, all acoustic signals of L-ch / R-ch and C-ch are input from the external controller 4, whereas in the third embodiment, the CPU 14 detects the speaker attachment position. The external controller 4 is instructed to output an acoustic signal of either L-ch / R-ch or C-ch according to the detection result by the unit 11.
[0045]
Accordingly, an L-chR-ch or C-ch signal is input from the external controller 4 according to the speaker mounting position.
[0046]
[Embodiment 4]
Next, a fourth embodiment of the present invention will be described with reference to FIG.
[0047]
In this Embodiment 4, the speaker attachment position detection part 11 in the above-mentioned Embodiment 1-3 is shown as a modification.
[0048]
FIG. 9 is a diagram illustrating the configuration of the speaker attachment position detection unit 11 according to the fourth embodiment. FIG. 9 is a cross-sectional view of the fixing unit for attaching the dedicated speakers 2 and 3 to the lower side of the image display device 1. 1 having the same functions as those in FIG. 5 are assigned the same numbers.
[0049]
In FIG. 9, reference numeral 110 denotes a micro switch functioning as a speaker attachment position detection unit, and 200 denotes a housing for the dedicated speakers 2 and 3. In this case, the presence or absence of conductivity may be either.
[0050]
FIG. 9 shows a state where the fixing bolts 202 of the dedicated speakers 2 and 3 are being inserted. When the fixing bolt 202 is completely inserted, the contact of the micro switch 110 is closed, and the dedicated speaker is located at this position. Detect that 2 and 3 are attached.
[0051]
[Embodiment 5]
Next, a fifth embodiment of the present invention will be described with reference to FIG.
[0052]
In this Embodiment 5, the speaker attachment position detection part 11 in Embodiment 1-3 mentioned above is shown as a modification.
[0053]
FIG. 10 is a diagram for explaining the attachment position detection means unit 11, and is a cross-sectional view of a fixing unit for attaching the dedicated speakers 2 and 3 to the lower side of the image display device 1, and in the first to fourth embodiments described above. Components having the same functions as those in FIG. 5 or FIG. 9 are assigned the same numbers.
[0054]
In FIG. 10, 115 is a light emitting diode, 116 is a phototransistor, 210 is a speaker detection tab, and is a light-shielding projection provided on the housing of the dedicated speakers 2 and 3.
[0055]
When the dedicated speakers 2 and 3 are not attached at this position, the light emitted from the light emitting diode 115 reaches the phototransistor 116, and the phototransistor 116 is in the on state. When the dedicated speakers 2 and 3 are attached at this position, the speaker detection tab 210 blocks this light, thereby turning off the phototransistor 116. Thereby, it is detected that the dedicated speakers 2 and 3 are attached.
[0056]
[Embodiment 6]
FIG. 11 is a block diagram showing the configuration of the speaker drive circuit in the image display apparatus according to Embodiment 6 of the present invention. Focusing only on the flow of the acoustic signal, as in FIG. 3 in Embodiment 1 described above. I'm drawing. In addition, the same number is assigned to a component having the same function as in FIG. Further, the portions related to the external amplifier 5 and the external speakers 82 and 83 are omitted because they are the same as those in FIG. 3 in the first embodiment.
[0057]
In FIG. 11, 121 is an L-ch (left channel) power amplifier, 122 is an R-ch (right channel) power amplifier, 123 and 124 are C-ch (center channel) power amplifiers, and 161 is an L-ch. Output terminal 162 is an R-ch output terminal, and 163 and 164 are C-ch output terminals.
[0058]
In the sixth embodiment, electrodes are provided on the mounting portions for the dedicated speakers 2 and 3 disposed on both sides and the lower side of the image display device 1, respectively, and the output is output from the output terminals for the channels 161 to 164. . That is, an L-ch output terminal 161 and an R-ch output terminal 162 are arranged on the left side and the right side of the image display device 1, and C-ch output terminals 163 and 164 are arranged on the lower side. When the dedicated speakers 2 and 3 are attached, they are automatically connected to any one of these output terminals.
[0059]
In the sixth embodiment, the speaker attachment position detecting unit 11 in the first to fifth embodiments is not provided. However, regardless of the position where the dedicated speakers 2 and 3 are attached, the corresponding channel is automatically set. The sound is reproduced by supplying the sound signal to the dedicated speakers 2 and 3.
[0060]
[Embodiment 7]
Next, a seventh embodiment of the present invention will be described.
[0061]
In the seventh embodiment, the arrangement of the speaker units of the dedicated speakers 2 and 3 in the first to sixth embodiments is changed.
[0062]
FIG. 12 is a diagram showing the speaker unit arrangement of the dedicated speakers 2 and 3 according to Embodiment 7 of the present invention. Like FIG. 6 in Embodiment 1, FIG. Is attached to both sides of the image display device 1 to show the arrangement when outputting the sound of L-ch and R-ch, and FIG. 12B shows an arrangement example when it is attached to the lower side and used as a center speaker. ing. Each number in FIG. 12 shows the same thing as FIG.
[0063]
In the seventh embodiment, the direction when the dedicated speakers 2 and 3 are attached to the lower side of the image display device 1 and used as the center speaker is opposite to that in the first embodiment. That is, the high-frequency playback speaker units (tweeters) 24 and 34 are arranged so as to be on both the left and right sides. However, these tweeters 24 and 34 do not operate when the dedicated speakers 2 and 3 are attached to the lower side of the image display device 1 and used as a center speaker. Originally, the C-ch acoustic signal is a signal obtained by cutting the high-frequency component, so there is no acoustic signal to be reproduced by the tweeters 24 and 34. Only the mid-range components necessary for C-ch are reproduced from the woofers 22, 23, 32, 33, and the localization of the center position is stabilized.
[0064]
In addition, in the C-ch signal generation unit, for example, the center channel sound generation block 15 of FIG. 7 according to the above-described second embodiment, the driving of the tweeters 24 and 34 is stopped even without a function of cutting the high range. The same effect can be expected just by letting it go.
[0065]
Further, when the dedicated speakers 2 and 3 are used as the center speaker, it is possible to further stabilize the localization of the center position by driving only the two woofers 22 and 32 from the center.
[0066]
[Embodiment 8]
FIG. 13 is a diagram for explaining a case where only one dedicated speaker is attached to the lower side of the image display device 1 according to the eighth embodiment of the present invention.
[0067]
In FIG. 13, 7 is a dedicated speaker, 71 (FIG. 14) is a fixed portion of the dedicated speaker 7, 72 is a left gap filling member, and 73 is a right gap filling member.
[0068]
In the eighth embodiment, there is no difference between the left channel and the right channel of the dedicated speaker 7 and they are exactly the same, and are symmetrical in structure.
[0069]
FIG. 14 shows a unit arrangement of the dedicated speaker 7. FIG. 14 (a) shows an example in which a high-frequency dedicated speaker unit (tweeter) 74 is arranged in the center and woofers 75 are arranged on both sides thereof. Yes. FIG. 14B shows an example in which a woofer 75 is arranged at the center and tweeters 74 are arranged at both ends thereof.
[0070]
As shown in FIG. 14B, when the dedicated speaker having the tweeters 74 arranged at both ends is used as the center speaker, the tweeter 74 responsible for high-frequency sound reproduction is the same as in the seventh embodiment. The output is stopped and the localization of the center position is stabilized.
[0071]
Moreover, in the above-described first to eighth embodiments, the acoustic signal externally supplied from the external controller 4 to the image display device 1 and the processing in the acoustic switching unit 13 and the center channel acoustic generation block 15 are analog signals. May also be a digital signal.
[0072]
In each embodiment, the speaker driving power amplifier 12, the L-ch (left channel) power amplifier 121, the R-ch (right channel) power amplifier 122, the C-ch (center channel) power amplifier 123, 124 may be incorporated in the image display apparatus 1 according to the present embodiment or may be incorporated in the dedicated speakers 2 and 3.
[0073]
Note that the present invention can be applied to a system (for example, a copier, a facsimile machine, etc.) composed of a single device even if it is applied to a system composed of a plurality of devices (for example, a host computer, interface device, reader, printer, etc.). May be.
[0074]
Another object of the present invention is to supply a storage medium (or recording medium) on which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or apparatus, and to perform computer (or CPU or MPU) of the system or apparatus. ) Is also achieved by reading and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an operating system (OS) running on the computer based on the instruction of the program code. A case where part or all of the actual processing is performed and the functions of the above-described embodiments are realized by the processing is also included.
[0075]
Further, after the program code read from the storage medium is written in a memory provided in a function expansion card inserted into the computer or a function expansion unit connected to the computer, the function is determined based on the instruction of the program code. The case where the CPU of the expansion card or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing is also included.
[0076]
As described above, according to the present embodiment, the thin dedicated speaker considering the thickness of the thin image display device main body is either left or right or above (down) the image display device main body, depending on the user's preference. The image display apparatus main body can be directly attached and can control the supply of acoustic signals to the speakers in accordance with the positions of the speakers.
[0077]
As a result, the sound of the L-ch, R-ch, or C-ch is automatically output from the speaker depending on whether the speaker is attached to the left / right / upper (lower), so that the thin image display device is thin. Utilizing the merits, the center speaker can be installed without damaging the beauty of the signal lines, and more realistic sound field effects can be expected.
[0078]
In the above-described embodiment, the detection unit for detecting the position where the speaker is disposed is provided, and the acoustic signal output to each speaker is controlled according to the detection result. The present invention is not limited, and for example, the user may instruct the image display device to arrange the speaker using a remote controller or the like, and control the acoustic signal output to each speaker according to the instructed speaker arrangement. good.
[0079]
【The invention's effect】
As described above, according to the present invention, the speakers can be directly attached to either the left or right side or the upper (lower) side of the image display apparatus main body, and each speaker is attached according to the position of the speakers. There is an effect that the supplied acoustic signal can be controlled.
[Brief description of the drawings]
FIG. 1 is a diagram showing a specific example of an attachment position of an image display apparatus main body and a speaker according to an embodiment of the present invention.
FIG. 2 is a diagram showing an installation example of an image display device main body, a speaker, and a separate speaker according to the present embodiment.
FIG. 3 is a block diagram showing a configuration of a speaker drive circuit according to Embodiment 1 of the present invention.
FIG. 4 is a flowchart illustrating output control of an acoustic signal to a speaker in the image display apparatus according to the present embodiment.
FIG. 5 is a cross-sectional view of the speaker mounting fixing portion according to the first embodiment.
FIG. 6 is a diagram illustrating an arrangement example of speaker units of a dedicated speaker according to the first embodiment.
FIG. 7 is a block diagram showing a configuration of a speaker drive circuit according to Embodiment 2 of the present invention.
FIG. 8 is a block diagram showing a configuration of a speaker drive circuit according to Embodiment 3 of the present invention.
FIG. 9 is a diagram showing a configuration of a speaker attachment position detection unit according to Embodiment 4 of the present invention.
FIG. 10 is a diagram showing a configuration of a speaker attachment position detection unit according to Embodiment 5 of the present invention.
FIG. 11 is a block diagram showing a configuration of a speaker drive circuit according to Embodiment 6 of the present invention.
FIG. 12 is a diagram showing a speaker unit arrangement of a dedicated speaker according to Embodiment 7 of the present invention.
FIG. 13 is a diagram illustrating a case where only one dedicated speaker is attached to the lower side of an image display device according to an eighth embodiment of the present invention.
FIG. 14 is a diagram showing an arrangement example of speaker units of a dedicated speaker according to Embodiment 8 of the present invention.
[Explanation of symbols]
1 Image display device
2 Speaker for left channel
3 Dedicated speaker for right channel
11 Speaker mounting position detector
41, 42 Attenuator
43 Master volume

Claims (4)

An image display device to which a speaker can be attached,
The speakers can be attached one by one to the left and right sides of the image display device, and two speakers can be attached to the upper side or the lower side of the image display device. When attached to the upper or lower side of the image display device, the combined length of the two speakers corresponds to the horizontal width of the image display device, and the speakers are attached to both the left and right sides of the image display device. Further, a gap filling member for making up the difference between the vertical width of the image display device and the length of the speaker has a structure that can be attached to both the left and right sides of the image display device,
Center channel acoustic signal, right channel acoustic signal and left channel acoustic signal are input from an external signal source,
Whether at least one of the speaker is mounted on the upper side or lower side of the image display device, or a detection unit 2 of the loudspeaker senses whether attached to the left and right sides of the image display device,
When it is detected by the detection means that at least one of the speakers is attached to the upper side or the lower side of the image display device, the center channel acoustic signal input from the external signal source to the speaker is supplied to the speaker. And when the detection means detects that the two speakers are attached to the left and right sides of the image display device, the right channel sound signal and the left channel sound signal input from the external signal source Supply means for supplying to each of the corresponding speakers,
An image display device comprising: An image display device to which a speaker can be attached,
The speakers can be attached one by one to the left and right sides of the image display device, and two speakers can be attached to the upper side or the lower side of the image display device. When attached to the upper or lower side of the image display device, the combined length of the two speakers corresponds to the horizontal width of the image display device, and the speakers are attached to both the left and right sides of the image display device. Further, a gap filling member for making up the difference between the vertical width of the image display device and the length of the speaker has a structure that can be attached to both the left and right sides of the image display device,
A right channel sound signal and a left channel sound signal are input from an external signal source, and a center channel sound signal is generated based on the right channel sound signal and the left channel sound signal input from the external signal source. Further comprising means,
If at least one of the speaker is detected and is attached to the upper or lower side of the image display device by the pre-Symbol detection means, it supplies a sound signal of the center channel generated by the generating means to said speaker, If two of the speaker Ri by said detecting means is detected to be attached to the left and right sides of the image display device, the acoustic signal of the acoustic signal and the left channel to the right channel input from the external signal source images display you and supplying respectively corresponding the speaker. A method of controlling an image display device to which a speaker can be attached,
The speakers can be attached one by one to the left and right sides of the image display device, and two speakers can be attached to the upper side or the lower side of the image display device. When attached to the upper or lower side of the image display device, the combined length of the two speakers corresponds to the horizontal width of the image display device, and the speakers are attached to both the left and right sides of the image display device. Further, a gap filling member for making up the difference between the vertical width of the image display device and the length of the speaker has a structure that can be attached to both the left and right sides of the image display device,
Center channel acoustic signal, right channel acoustic signal and left channel acoustic signal are input from an external signal source,
Whether at least one of the speaker is mounted on the upper side or lower side of the image display device, or a detection step of two of the loudspeaker senses whether attached to the left and right sides of the image display device,
When it is detected by the detection step that at least one of the speakers is attached to the upper side or the lower side of the image display device, the center channel acoustic signal input from the external signal source to the speaker is supplied to the speaker. And when the detection means detects that the two speakers are attached to the left and right sides of the image display device, the right channel sound signal and the left channel sound signal input from the external signal source Supplying to each of the corresponding speakers,
A control method for an image display device, comprising: A method of controlling an image display device to which a speaker can be attached,
The speakers can be attached one by one to the left and right sides of the image display device, and two speakers can be attached to the upper side or the lower side of the image display device. When attached to the upper or lower side of the image display device, the combined length of the two speakers corresponds to the horizontal width of the image display device, and the speakers are attached to both the left and right sides of the image display device. Further, a gap filling member for making up the difference between the vertical width of the image display device and the length of the speaker has a structure that can be attached to both the left and right sides of the image display device,
A right channel sound signal and a left channel sound signal are input from an external signal source, and a center channel sound signal is generated based on the right channel sound signal and the left channel sound signal input from the external signal source. And further comprising a process
If at least one of the speaker is detected and is attached to the upper or lower side of the image display device by the pre-Symbol detection step, supplying an acoustic signal of a center channel generated by the generation step to the speaker, If two of the speaker Ri by said detection step is detected as being attached to the left and right sides of the image display device, the acoustic signal of the acoustic signal and the left channel to the right channel input from the external signal source the method of images display you and supplying to the loudspeaker respectively corresponding to.

Images