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DESCRIPTION JP2009284548

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DESCRIPTION JP2009284548
An audio output can be appropriately muted according to the state of an output device such as a
headphone or an antenna. A device for receiving a wireless signal and outputting an audio signal
from a first speaker, the connection portion to which an antenna and a terminal of a second
speaker are connected, and the antenna connected to the connection portion A receiver for
receiving a wireless signal via the connection, and detecting whether or not the terminal is
connected to the connection unit; if the terminal is not connected to the connection unit, an audio
signal is transmitted to the first speaker A mute instruction unit for muting an output to the first
speaker when the terminal is connected to the connection unit, a switch for selecting enable /
disable of the mute, and the switch. When mute disable is selected by the switch, the mute
function of the mute instructing unit is disabled, and the audio signal is output to the first
speaker even when the terminal is connected to the connection unit. And a mute control unit for.
[Selected figure] Figure 1
Voice output control device
[0001]
The present invention relates to a technique for appropriately muting sound output from an
output device such as a headphone or an external speaker.
[0002]
Currently, headphones are commonly used as devices for connecting to electronic devices such
as televisions and radios to listen to audio.
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Further, with the advancement of electronic devices, there are various headphones equipped with
a remote control for controlling music reproduction, an antenna for a TV tuner, and the like.
[0003]
FIG. 31 is a schematic view of a conventional headphone antenna. The headphone antenna 90 is
composed of a speaker unit 91, a cable 92 and a plug 93 as shown in FIG.
[0004]
When the headphone plug 93 is connected to an electronic device such as a television, a sound
signal from the device is transmitted to the speaker unit 91 via the cable 92 and output as a
sound. The headphone antenna 90 also has a line 92c for the antenna together with the lines 92a
and 92b for the sound signal of the cable 92, and transmits the received signal through the line
92c for the antenna to the electronic device.
[0005]
By using the headphone antenna 90 having the functions of headphones and antenna as
described above for a unit type TV (Television) tuner mounted in a mobile bay of a personal
computer or the like, space saving of this connection portion can be achieved. On the other hand,
in such a device for connecting headphones, one having a mute function for muting the audio
output from the speaker when the plug of the headphone is inserted into the jack of the tuner
side is generally used.
[0006]
JP-A-2000-182310 JP-A-2002-276982 JP-A-9-116961 JP-A-10-155191 JP-A-2002-10389
[0007]
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2
As described above, in the case of multifunctional headphones, there is a case where it is desired
to use only functions other than outputting sound.
However, in the conventional headphones, it is a premise to output sound, and it is not a
configuration that can use only the other functions.
[0008]
For example, in the TV tuner provided with the mute function, it is determined whether or not
the headphone antenna is connected and it is determined whether or not to mute, and therefore,
when the headphone antenna is connected, it is always muted. Thus, the headphone antenna is
simply used as an antenna and the speaker can not hear the sound.
[0009]
Therefore, the present invention provides a technology capable of appropriately muting the
audio output in accordance with the state of an output device such as a headphone or an
antenna.
[0010]
In order to solve the above-mentioned subject, the present invention adopted the following
composition.
That is, the output device of the present invention is a device that outputs a sound signal from an
electronic device as a sound, and the connection portion connected to the connection terminal of
the electronic device and the one end portion are connected to the connection portion A linear
portion for transmitting a sound signal from a device, and an output portion connected to an end
of the linear portion opposite to the connection portion to relay the sound signal and output the
sound signal as a sound The connection unit includes a state presenting unit including a
detachable relay unit and indicating whether the output unit is connected to the relay unit.
[0011]
In the output device, the state presentation unit may be a terminal having different electrical
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3
characteristics depending on a connection state of the output unit and the relay unit.
[0012]
The output unit includes a detection unit that detects whether the output unit is connected to the
relay unit, and the signal unit transmits the detection result from the relay unit to the connection
unit. May be provided.
[0013]
In the output device, the wire portion is a signal line for an antenna or a signal line for
transmitting a sound signal has a function of an antenna, and the connection portion transmits a
signal line for the antenna or the sound signal. You may provide the output terminal which
outputs the received signal from a signal wire | line to the said electronic device.
[0014]
The output device may be a device connected to an electronic device that mutes the sound signal
according to the electrical characteristics of the state presentation unit.
[0015]
The output device may include the output unit that is detachably connected to the relay unit and
outputs a sound signal from the relay unit as a sound.
[0016]
The output device may include, in the relay unit, a switching unit configured to switch whether or
not to make presentation by the state presentation unit.
[0017]
The output device has a circuit in which the state presentation unit is closed by connecting the
output unit to the relay unit, and the circuit is opened when the connection is disconnected, and
the switching unit is configured to perform the circuit separately from the connection. It may be
a switch for opening and closing the switch.
[0018]
Further, the output device of the present invention is a device that outputs a sound signal from
an electronic device as a sound, and a connection portion connected to a connection terminal of
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the electronic device, and one end portion is connected to the connection portion A linear portion
for transmitting a sound signal from a device, an output portion connected to an end of the linear
portion opposite to the connection portion and outputting the sound signal as a sound, and the
above-mentioned linear portion on the linear portion A switching unit is disposed between the
connection unit and the output unit, and switches a state to be presented to the electronic device
through the wire unit.
[0019]
Also, the audio output control device of the present invention is an audio output control device in
an electronic device that outputs an audio signal from a first speaker, and the connecting portion
to which the terminal of the antenna and / or the second speaker is connected It is detected
whether or not a terminal is connected, and when the terminal is not connected to the connection
unit, an audio signal is output to the first speaker, and the terminal is connected to the
connection unit. When the mute disable is selected by the mute command unit for muting the
output to the first speaker and the switch for selecting enable / disable of the mute, the mute
function of the mute command unit is disabled. And a mute control unit for outputting the audio
signal to the first speaker even when the terminal is connected to the connection unit.
[0020]
The said audio | voice output control apparatus was equipped with the said switch in the said
2nd speaker, and was provided with the detection part which detects the state of this switch.
[0021]
The audio output control device according to the present invention is an audio output control
device in an electronic device which outputs an audio signal from a first speaker, and of a
terminal connected to a connection portion to which an antenna and / or a second speaker are
connected. When the type is detected and the second speaker is connected to the connection
unit, the output to the first speaker is muted, and when the second speaker is not connected, the
mute function is performed. And a mute control unit for outputting an audio signal to the first
speaker.
[0022]
The audio output control device according to the present invention is an audio output control
device in an electronic device that outputs an audio signal from a first speaker, and is connected
to a connection portion to which an antenna to which the second speaker portion can be
attached and detached is connected It is detected whether or not the second speaker portion is
connected to the selected antenna, and when the second speaker portion is connected, the output
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to the first speaker is muted and the connection is performed. And a mute control unit for
disabling the mute function and outputting an audio signal to the first speaker when the second
speaker unit is not connected to the unit.
[0023]
Even when the audio output control device mutes the output to the first speaker, when the mute
disable is selected by the switch for selecting the enable / disable of the mute, the first output
The output to the speaker may be muted.
[0024]
Further, a receiving device according to the present invention is a receiving device in an
electronic device that receives a wireless signal and outputs an audio signal from a first speaker,
and a connection unit to which a terminal of an antenna and / or a second speaker is connected
A receiving unit that receives a wireless signal via the antenna connected to the connection unit;
and whether or not the terminal is connected to the connection unit is detected, and the terminal
is not connected to the connection unit In this case, an audio signal is output to the first speaker,
and when the terminal is connected to the connection unit, a mute instruction unit for muting the
output to the first speaker, and the activation of the mute When the mute function of the mute
instruction unit is invalidated and the terminal is connected to the connection unit, when the
mute invalidation is selected by the switch and the switch for selecting / invalidation Also, and a
mute control unit configured to output the audio signal to said first speaker.
[0025]
Further, a receiving device of the present invention is a receiving device in an electronic device
that receives a wireless signal and outputs an audio signal from a first speaker, and a connection
unit to which an antenna and / or a second speaker are connected; In a case where a type of a
receiving unit that receives a wireless signal via the antenna connected to the connection unit
and a terminal connected to the connection unit is detected, and the second speaker is connected
to the connection unit , Mute the output to the first speaker, and disable the mute function to
output an audio signal to the first speaker when the second speaker is not connected. The
[0026]
Even if the receiving apparatus mutes the output to the first speaker, when the mute disable is
selected by the switch for selecting the enabling / disabling of the mute, the receiving apparatus
may send the signal to the first speaker. You may mute the output of.
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[0027]
Further, a receiving device according to the present invention is a receiving device in an
electronic device that receives a wireless signal and outputs an audio signal from a first speaker,
and is connected to an antenna to which a second speaker portion can be attached and detached.
A receiver, a receiver that receives a wireless signal via the antenna connected to the connector,
and whether the second speaker part is connected to the antenna connected to the connector,
When the second speaker portion is connected, the output to the first speaker is muted, and
when the second speaker portion is not connected to the connection portion, the mute function is
disabled. And a mute control unit for outputting an audio signal to the first speaker.
[0028]
Even if the receiving apparatus mutes the output to the first speaker, when the mute disable is
selected by the switch for selecting the enabling / disabling of the mute, the receiving apparatus
may send the signal to the first speaker. You may mute the output of.
[0029]
In the receiving device, the switch may be a switch provided to the second speaker.
[0030]
The receiving device may be an expansion unit exclusively connected to another expansion unit
with respect to an expansion slot of the electronic device.
[0031]
The receiving device may further include a TV tuner unit that generates video data and audio
data from a radio signal of TV broadcast received as the wireless signal.
[0032]
Further, a receiving system according to the present invention is a system for receiving a wireless
signal and outputting an audio signal from a first speaker, the connection portion to which an
antenna and / or a terminal of a second speaker are connected, and the connection Receiving
unit that receives a wireless signal via the antenna connected to the unit; and outputting voice
from the first speaker based on the voice signal, and muting the output of the voice according to
a mute signal It is detected whether or not the terminal is connected to the unit and the
connection unit, a mute signal is notified to the output unit based on the detection result, and the
terminal is not connected to the connection unit, A mute instruction unit for outputting the audio
signal to the first speaker and for muting the output to the first speaker when the terminal is
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connected to the connection unit; Switch for selecting enable / disable of the switch, and when
mute disable is selected by the switch, the mute function of the mute instructing unit is disabled
and the terminal is connected to the connection unit, And a mute control unit for outputting the
audio signal to the first speaker.
[0033]
The receiving system may include the detection unit that includes the switch in the second
speaker and detects a state of the switch.
[0034]
Further, a receiving system according to the present invention is a system for receiving a wireless
signal and outputting an audio signal from a first speaker, the connection portion to which an
antenna and / or a terminal of a second speaker are connected, and the connection A receiver for
receiving a wireless signal via the antenna connected to the receiver; and an output unit for
outputting an audio from the first speaker based on the audio signal, and for muting an output of
the audio according to a mute signal; And detecting a type of a terminal connected to the
connection unit, notifying a mute signal to the output unit based on the detection result, and,
when the second speaker is connected to the connection unit, Mute the output to one speaker,
and disable the mute function to output the audio signal to the first speaker when the second
speaker is not connected to the connection unit. And a door control unit.
[0035]
Further, a receiving system according to the present invention is a system for receiving a wireless
signal and outputting an audio signal from a first speaker, wherein the connecting portion is
connected to an antenna to which the second speaker can be attached and detached. A receiver
for receiving a wireless signal via the antenna connected to the receiver; and an output unit for
outputting an audio from the first speaker based on the audio signal, and for muting an output of
the audio according to a mute signal; And detecting whether or not the second speaker portion is
connected to an antenna connected to the connection portion, and notifying a mute signal to the
output portion based on the detection result, the second speaker portion When connected, the
output to the first speaker is muted, and when the second speaker portion is not connected to the
connection section, the mute function is disabled and the sound is disabled. And a mute control
unit for outputting a voice signal to the first speaker.
[0036]
Even if the receiving system mutes the output to the first speaker, when the mute disable is
selected by the switch for selecting the enabling / disabling of the mute, to the first speaker You
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8
may mute the output of.
[0037]
The receiving system may include an expansion slot capable of exclusively connecting a plurality
of types of expansion units, and may include the connection unit, the receiving unit, and the mute
control unit as the expansion units.
[0038]
The receiving unit may be a TV tuner unit that generates video data and audio data from a radio
signal of TV broadcast received as the wireless signal.
In the present invention, the second speaker may be a device such as a headphone or an external
speaker that outputs audio that can be attached to and detached from the connection unit.
The headphone may be any device such as an earphone, ear speaker, bone conduction speaker,
etc. that can be worn on the head or the like and can hear audio output personally.
Further, in the present invention, the sound may be music, voice, electronic sound, or the like as
long as it is simply sound, and is not limited to the sound of a TV composed of human voice,
music or the like.
[0039]
The present invention makes it possible to mute audio output appropriately according to the
state of output devices such as headphones and antennas.
[0040]
The schematic diagram of the headphone antenna according to the present invention. The
schematic diagram of the headphone antenna according to the present invention with the
speaker unit removed from the appearance of the headphone antenna according to the present
invention. An illustration of a computer connected to an antenna A view of a tuner unit A
diagram of a tuner unit A diagram of a dedicated antenna A diagram of a computer according to
a second embodiment A diagram of a headphone according to a second embodiment A diagram
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9
of a headphone antenna according to the third embodiment Outline view of relay unit of mode 3
Schematic view of headphones according to embodiment 4 Schematic view of personal computer
(reception system) 2 equipped with tuner unit (receiving apparatus) 1 according to the present
invention Connection unit and explanatory view of terminals Connection unit Figure showing the
terminal connected to A schematic configuration diagram of the sixth embodiment An
explanatory diagram of a mute control unit A diagram showing a state where a terminal is
connected to a connection unit A schematic configuration diagram of a seventh embodiment of
the present invention Explanatory view of a headphone antenna and a mute control unit
Schematic diagram of the eighth embodiment of the present invention Outline view of the tuner
unit 1 Schematic diagram of the tuner unit 1 Schematic diagram of the modification 1 in the
eighth embodiment Schematic diagram of the first embodiment in the eighth embodiment
Schematic configuration diagram of modification 2 Schematic diagram of conventional
headphones
[0041]
Hereinafter, the best mode for carrying out the present invention will be described with
reference to the drawings.
The configuration of the following embodiment is an exemplification, and the present invention is
not limited to the configuration of this embodiment.
Embodiment 1 1.1.
Overall Configuration FIG. 1 is a schematic view of a headphone antenna (output device) 3HA
according to the present invention, and FIG. 2 is a state in which the headphone antenna 3HA is
connected to the connection portion 17 of the electronic device and the output portion (speaker
unit) 31 is removed. FIG. 3 is an external view of the headphone antenna 3HA.
[0042]
The headphone antenna 3HA according to the present embodiment includes a speaker unit
(output unit) 31, a relay unit 32, a cable (filament) 33, and a plug (connection unit) 34, as shown
in FIGS. There is.
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10
[0043]
In the headphone antenna 3HA, when the plug 34 is connected to an electronic device such as a
television and an audio signal from the device is input, it is transmitted to the speaker unit 31 via
the cable 33 and is output as audio.
The cable 33 of the headphone antenna 3HA has a line 33c for the antenna and a line 33d for
transmitting a connection state described later, together with the lines 33a and 33b for the audio
signal and the line 33e for the GND.
The lines 33a to 33e are connected to 34a to 34e of the plug 34, respectively.
Although only the lines (signal lines) are shown as the cables 33 in FIGS. 1 and 2, these lines are
actually covered.
[0044]
4 and 5 are external views of the relay unit 32. FIG.
As shown in FIG. 4, the relay unit 32 includes a jack 35 so that the plug 36 of the speaker unit
31 can be attached and detached.
Further, as shown in FIGS. 4 and 5, the relay portion 32 is provided with a locking portion (a clip
in this example) 37 for locking at an arbitrary position.
[0045]
The jack 35 of the relay unit 32 includes terminals 32a to 32d connected to the lines 33a, 33b,
33d, and 33e.
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11
In this example, the terminal 32c functions as a detection unit for detecting whether or not the
speaker unit 31 is connected.
[0046]
The terminal 32 c of the relay unit 32 is connected to the GND terminal 32 d through the
terminal 36 c of the plug 36 when the speaker unit 31 is connected to the relay unit 32 as shown
in FIG. 1.
And when the speaker unit 31 is isolate | separated from the relay part 32, as shown in FIG. 2, it
becomes non-contact (NC: No Connect).
That is, when the speaker unit 31 is separated from the relay unit 32, the terminal (state
presentation unit) 34e of the plug 34 is equivalent to GND when the NC and the speaker unit 31
are connected to the relay unit 32. Thus, the electrical characteristics change.
[0047]
Thereby, in the electronic device to which the headphone antenna 3HA of this example is
connected, whether the speaker unit 3HA is connected or not according to the electrical
characteristic of the terminal 34d of the plug 34, that is, a function of outputting sound from the
headphone antenna Can be determined.
[0048]
Next, an example in which the headphone antenna 3HA of the present embodiment is used for
the personal computer (reception system) 2 equipped with the tuner unit (reception device) 1
will be described.
The computer 2 detects whether the sound output function of the headphone antenna 3HA is
valid or invalid, and mutes the audio output to the built-in speakers 22R and 22L when the sound
output function is valid, and outputs the sound output function. When is disabled, the mute
function is disabled and audio is output from the speaker.
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12
FIG. 6 is an external view of this computer, and FIG. 7 is a schematic block diagram.
[0049]
In FIG. 6, the notebook PC 2 includes a computer main body 51 and a display unit 53 connected
to the computer main body 51 by a hinge 52 so as to be openable and closable.
Arrows X1 and X2 indicate the width direction of the notebook PC 2, arrows Y1 and Y2 indicate
the depth direction, and arrows Z1 and Z2 indicate the height (thickness) direction.
The computer main body 51 has a keyboard unit 54 on the upper surface, a CPU and the like
inside, and an expansion bay 56 for accommodating the expansion unit is formed on the lower
right side.
The expansion bay 56 has an opening 58 in the right side surface 57 of the computer main body
51 as an insertion port of the expansion unit.
The extension bay 56 is in the form of a slit extending from the opening 58 in the direction of
the arrow X2 to the middle of the device, and a connector 59 is provided at the end on the X2
side.
Since the connector 59 is located inside the computer main body 51, a part of the upper surface
of the main body 51 is cut away in FIG.
[0050]
Further, as the expansion unit, a tuner unit (receiving device) 1, an FD unit 61, a CD-ROM unit
62, and the like are prepared.
These extension units 1, 61, 62 are flat plates that can be fitted into the extension bay 56, and
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13
have a connector 63 that engages with the connector 59 at the tip of the insertion direction (X2).
The units 1, 61, 62 are mounted exclusively in the expansion bay 56, respectively.
As a result, the notebook PC 2 can access the expansion unit through the connector 59 and
expand its function.
[0051]
That is, the user selects one of the tuner unit 1, the FD unit 61, and the CD-ROM unit 62
according to the function to be used, and inserts it into the expansion bay 56.
The expansion bay 56 may be referred to in various terms, and may also be referred to as a bay,
an expansion slot, a multibay, or a multipurpose bay (multipurpose bay).
[0052]
Then, as shown in FIG. 7, when the tuner unit 1 is inserted into the expansion bay 56 of the PC 2,
the tuner unit 1 receives a TV broadcast and outputs a video signal and an audio signal to the PC
2.
The sound signal is converted into a signal of a predetermined format by the sound chip 25 and
then output to the speaker amplifier (output unit) 21 and the headphone amplifier 23.
The speaker amplifier (output unit) 21 amplifies this audio signal and causes the speakers 22R
and 22L to output audio.
Also, the headphone amplifier 23 amplifies this audio signal and outputs audio from the
headphone connected to the headphone jack 17 or the headphone jack 24.
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14
The signal from the sound chip 25 may be connected directly to the headphone jack 17 or the
headphone jack 24 without using the headphone amplifier 23.
[0053]
The speaker amplifier 21 has a mute function, and mutes the audio output from the speakers
22R and 22L according to the mute signal from the jacks 17 and 24.
In the present embodiment, a low mute signal is output when headphones are connected to the
jacks 17 and 24, and a high mute signal is output when the headphones are not connected.
The outputs of the jacks 17 and 24 are input to the speaker amplifier 21 through the AND circuit
21a. Then, the speaker amplifier 21 mutes the outputs of the speakers 22R and 22L when the
output of the AND circuit 21a is Low. That is, when a headphone is connected to either of the
jacks 17 and 24, the output to the speakers 22R and 22L is muted. The operation of the mute
function in the case where the headphone is connected to the jack 17 and the case where the
headphone is not connected in the state where the headphone is not connected to the jack 24
will be described below.
[0054]
FIG. 8 is an external perspective view of the tuner unit 1, and FIG. 9 is a schematic block diagram
of the tuner unit 1. As described above, the outer shape of the housing 10 is substantially flat,
and the connector 63 is provided so as to protrude from the end surface in the insertion
direction (X2 direction). In addition, a headphone jack (connection portion) 17 and an S-video
input are provided on the exterior surface 64 located on the rear end surface in the insertion
direction, that is, on the outside when placed in the expansion bay 56 and flush with the right
side surface of the notebook PC 2 Terminals 65 and composite input terminals 66 are arranged
in a row.
[0055]
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15
As shown in FIG. 9, the tuner unit 1 includes a jack 17, a decoding unit (reception unit) 12, and a
mute control unit 18. The jack 17 is connected to the terminal (plug) of the antenna 3A or the
headphone antenna 3HA as shown in FIG.
[0056]
The decoding unit 12 generates a video signal and an audio signal based on a wireless signal (TV
broadcast) received through the antenna portion of the antenna 3A or the headphone antenna
3HA connected to the jack 17.
[0057]
As shown in FIG. 2, the jack 17 on the TV tuner side has terminals 17a to 17e for left and right
audio signals, an antenna, a mute signal, and GND, and is connected to the terminals 34a to 34e
of the headphone antenna 3HA.
[0058]
The mute control unit 18 applies a predetermined voltage (for example, Vcc = 3 to 5 V) to the
terminal 17 d of the connection unit 17.
Therefore, when the plug 36 of the speaker unit 31 is not inserted into the relay unit 32, the
terminal 34d is in the high state of the predetermined voltage value.
That is, the mute control unit 18 sets the mute signal to the speaker amplifier 21 to High (the
mute function is disabled), and causes the speakers 22R and 22L to perform audio output. In the
present embodiment, the audio output control in the computer 2 is the connection unit 17 for
detecting the state of the output devices 3H and 3HA, and the mute control unit 18 for
controlling the audio output based on the potential of the terminal 17d of the connection unit.
Configure the device.
[0059]
On the other hand, when the plug 36 is inserted into the relay portion 32, as shown in FIG. 1, the
terminal (detection portion) 32c of the relay portion 32 and the terminal 32d are conducted by
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16
the plug 36, and the terminal 17d on the TV tuner side is GND. And the low state (approximately
0 V). That is, the mute control unit 18 sets the mute signal to the speaker amplifier 21 to Low
(the mute function is enabled), and mutes the output to the speakers 22R and 22L.
[0060]
Thus, in the present embodiment, the mute function can be controlled to be valid or invalid
depending on whether or not the speaker unit 31 is connected to the relay unit 32.
[0061]
An antenna 3A as shown in FIG. 10 may be connected to the connection portion 17.
A terminal 44d for the mute signal is NC when the terminal of the antenna 3A which is not
shared with this headphone is used. Even in this case, when the antenna 3A is connected to the
connection unit 17, the terminal 17d is maintained at High, so the mute control unit 18 can set
the mute signal to High to invalidate the mute function.
[0062]
As described above, according to the present embodiment, since the connection state of the
speaker unit 31 can be presented, the mute function can be appropriately controlled on the
notebook PC side. Thus, for example, when it is desired to view personally, the speaker unit 31 is
connected to the relay unit 32, the voice of the TV broadcast received through the antenna line is
listened to by the headphone antenna 3HA, and a plurality of people want to view it. In this case,
it is possible to separate the speaker unit 31 from the relay unit and to listen to the sound of TV
broadcast received through the antenna line with the speakers 22R and 22L. As described above,
in the present embodiment, it is possible to select whether or not to output sound from the
speakers 22R and 22L depending on whether the speaker unit 31 is connected or separated. Can
provide And also in this case, the antenna can continue to function effectively.
[0063]
Further, by providing the clip 37 in the relay unit 32, the clip 37 is fixed to the clothes of the
user, and the relay unit 32 can be located at an arbitrary position even when the speaker unit 31
attached to the user's ear or the like is removed. It can be fixed and the antenna can be kept in a
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17
position with good reception sensitivity, for example a high position.
[0064]
Furthermore, even when a dedicated antenna 3A is connected to the connection portion 17, the
outputs to the speakers 22R and 22L are not muted, and the connection portion 17 of the
headphone antenna 3HA and the dedicated antenna 3A can be shared.
In addition to the TV tuner, the present embodiment can be widely applied to electronic devices
such as a radio, a mobile phone, and a mobile TV, which connect an antenna and a headphone.
Although the antenna line 33c is separately provided in the present embodiment, it is not
necessary to provide the dedicated line 33c in order to realize the antenna function. Since the
frequency bands of the TV broadcast signal and the audio signal are different, if the signal of the
frequency band of the TV broadcast signal propagated by the audio signal lines 33a and 33b is
separated and extracted by the notebook PC main body, the TV broadcast signal is received It
will be possible.
[0065]
Therefore, the present invention makes the output part detachable so that the connection state of
the output part can be presented, thereby indicating whether the sound output function is valid
or invalid, so that other functions can be appropriately used. Provide the technology to
[0066]
Second Embodiment FIG. 11 and FIG. 12 are schematic configuration diagrams of a second
embodiment of the present invention.
The present embodiment shows an example of headphones provided with a controller. The same
members as those in the embodiment described above are denoted by the same reference
numerals, and the description thereof will not be repeated.
[0067]
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18
As shown in FIGS. 11 and 12, the headphone 3H of the present embodiment includes the
controller 38 in the relay unit 32, and the control signal from the controller 38 is connected to
the terminal 34f of the plug 34 via the line 33f for control signal. Connected When the
headphone 3H of this example is connected to the connection unit 19 of the notebook PC 2, this
control signal is transmitted from the terminal 19f of the connection unit 19 to the control unit
20 to control music playback, stop, change of volume, etc. Let it go. Although one line or terminal
from the controller 38 to the control unit 20 is shown for convenience, the number is not limited
to one, and may be an arbitrary number according to the number of functions to be controlled.
[0068]
Further, the speaker amplifier 21 according to the present embodiment receives the detection
result as to whether or not the speaker unit 31 is connected from the control unit 18 based on
the potential of the terminal 19 d of the jack 19 and the headphones are connected ( When the
received signal is Low), an audio signal is output in the setting of the sound field for headphones.
When the headphone is not connected (when the received signal is High), the sound signal is set
in the setting of the sound field for the speaker. Control to output Also in the present
embodiment, mute control may be performed according to the detection result as in the abovedescribed embodiment.
[0069]
As described above, according to the present embodiment, since the connection state of the
speaker unit 31 can be presented, the setting of the sound field can be appropriately controlled
on the notebook PC side. Further, since only the speaker unit 31 can be separated, only the
remote control function can be used while disabling the audio output function of the headphone
3H.
[0070]
Third Embodiment FIG. 13 is a schematic view of a third embodiment according to the present
invention. The present embodiment is different from the above-described first embodiment in
that a switch 32 e for disabling the mute is provided in the connection unit 32. Since the other
configurations are substantially the same, the same components are denoted by the same
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19
reference symbols, and the description thereof is omitted.
[0071]
As shown in FIG. 13, the mute invalidation switch 32e is provided between the terminal 32c of
the relay section 32 and the terminal 34d of the plug 34, and switches the opening and closing
of the muting line 33d.
[0072]
FIG. 14 is an external view of the relay unit 32 provided with the mute invalidation switch 32e.
In the present embodiment, the user operates the mute disable switch provided on the side
surface of the relay unit 32 to arbitrarily switch the enable / disable of the mute function.
[0073]
That is, if the mute disable switch is in a closed state, the audio output from the built-in speakers
22R and 22L is muted when the speaker unit 31 is connected to the relay unit 32, as in the first
embodiment described above. When 31 is not connected to the relay unit 32, the audio output
from the built-in speakers 22R and 22L is not muted.
[0074]
If the mute disable switch is open, the mute function can always be disabled because the
potential of the terminal (detection unit) 17d of the jack 17 does not fall to Low even if the
speaker unit 31 is connected to the relay unit 32. .
[0075]
Therefore, according to the present embodiment, it is possible to optionally set enabling /
disabling of the mute function, such as disabling the mute function while the speaker unit 31 is
connected to the relay unit 32.
That is, when the gain of the wireless signal is lowered when the speaker unit 31 is removed, the
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sound can be output from the built-in speakers 22R and 22L while the speaker unit 31 is
connected.
[0076]
Fourth Embodiment FIG. 15 is a schematic view of a fourth embodiment according to the present
invention.
In this embodiment, as compared with the second embodiment described above, the speaker unit
31 is fixed to a relay unit (also referred to as an operation unit in this example), and the
operation unit 32 is provided with a switch 32e for disabling mute. Are different. Since the other
configurations are substantially the same, the same components are denoted by the same
reference symbols, and the description thereof is omitted.
[0077]
As shown in FIG. 15, the mute invalidation switch 32e of this embodiment is connected to the
mute line 33d from the terminal 34d of the plug 34 and the ground line 33e in the operation
unit 32.
[0078]
That is, the potential of the terminal (detection unit) 19d of the jack 19 can be switched to High
or Low by opening and closing the mute invalidation switch 32e.
[0079]
Therefore, according to the present embodiment, even if the speaker unit is not attachable, the
user can arbitrarily switch on / off of the mute function at hand (operation unit).
[0080]
Fifth Embodiment FIG. 16 is a schematic configuration diagram of a personal computer
(reception system, electronic device) 2 equipped with a tuner unit (reception device) 1 according
to the present invention.
[0081]
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21
The tuner unit 1 of this example is inserted into a card slot of a personal computer (PC) 2,
receives TV broadcast, and outputs a video signal and an audio signal to the PC 2.
The sound signal is converted into a signal of a predetermined format by the sound chip 25 and
then output to the speaker amplifier (output unit) 21 and the headphone amplifier 23.
The speaker amplifier (output unit) 21 amplifies this audio signal and causes the speakers 22R
and 22L to output audio.
The headphone amplifier 23 amplifies this audio signal and causes the headphone connected to
the headphone antenna terminal (connection unit) 11 or the headphone terminal 24 to output
audio.
[0082]
As shown in FIG. 16, the tuner unit 1 includes a connection unit 11, a mute instruction unit 11 a,
a decode unit (reception unit) 12, a mute disable switch 14, and a mute control unit 15.
The connection portion (jack) 11 is connected to the terminal (plug) of the antenna 3A or the
headphone (second speaker) 3H, or the headphone antenna (the antenna to which the second
speaker can be attached and detached) 3HA as shown in FIG. Ru.
[0083]
The decoding unit 12 generates a video signal and an audio signal based on a wireless signal (TV
broadcast) received through the antenna portion of the antenna 3A or the headphone antenna
3HA connected to the connection unit 11.
[0084]
The mute instruction unit 11 a outputs a mute signal depending on whether the terminal is
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22
connected to the connection unit 11 or not.
Thus, when the terminal is not connected to the connection portion 11, the audio signal is output
to the speakers 22R and 22L, and when the terminal is connected to the connection portion 11,
the speaker 22R, Mute the output to 22L. Specifically, as shown in FIG. 17, the mute instructing
unit 11a arranges the grounded contact J4 and the contact J5 of the connection unit 11 in
parallel, and applies a predetermined voltage (for example, Vcc = 3 to 5 V) to the contact J5. It is
configured to apply voltage. With this configuration, when the terminal of FIG. 2 is not inserted,
the output of the contact J5 as the mute signal is in the High state of the predetermined voltage
value. On the other hand, when a terminal (FIG. 18 shows an example of the terminal of the
headphone antenna 3AH) is inserted into the connection portion 11, as shown in FIG. 18, the
contact J5 and the contact J4 are electrically connected by the terminal and mute The output of
the contact J5 as a signal is in a low state equivalent to GND (approximately 0 V). In this example,
although the presence or absence of connection of the terminal is electrically detected, the
present invention is not limited thereto, but a configuration in which a contact with the terminal
is mechanically detected by a switch at the time of connection or a configuration in which
photoelectric detection is performed by a photocoupler For example, the configuration may be
such that the mute signal can be output according to the connection state of the terminal.
[0085]
The mute disable switch (switching unit) 14 selects the enable / disable of the mute by the user's
operation, and outputs a mute control signal according to the enable / disable. In this example,
the mute control signal is output so as to be Low when the mute is enabled and High when the
mute is disabled.
[0086]
The mute control unit 15 disables the mute function when the mute invalidation is selected by
the switch 14, and outputs the mute signal as High even when the terminal is connected to the
connection unit 11 (Low). . That is, the mute control unit of this example takes the logical sum of
the mute signal of the mute instructing unit 11a and the mute control signal of the switch 14 and
outputs the result.
[0087]
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23
In this embodiment, a mute instruction unit 11a that outputs a mute signal according to whether
or not the output devices 3H and 3HA are connected to the connection unit 11, a mute disable
switch 14 that switches enable / disable of mute, and the mute instruction unit 11a. The mute
control unit 15 for controlling the audio output based on the state of the mute disable switch 14
constitutes an audio output control device in the computer 2.
[0088]
In the present embodiment, the headphone jack 24 is also provided at the front of the PC 2 and,
similarly to the connection portion 11, outputs a low mute signal when the headphone terminal
is connected and a high mute signal when the headphone terminal is not connected. Do.
The outputs of the mute control unit 15 and the headphone jack 24 are input to the speaker
amplifier 21 through the AND circuit 21a.
[0089]
The speaker amplifier 21 mutes the outputs of the speakers 22R and 22L when the output of the
AND circuit 21a is low. That is, when the output of either the mute control unit 15 or the
headphone jack 24 is Low, the output to the speakers 22R and 22L is muted. The selection
operation of the mute function when the terminal is connected to the connection unit 11 and
when the terminal is not connected to the connection unit 11 in a state where the terminal is not
connected to the headphone jack 24 will be described below.
[0090]
When no terminal is connected to the connection unit 11 with the switch 14 enabled, the tuner
unit 1 of this embodiment sets the mute signal from the mute instructing unit 11 a to High and
sets the output of the mute control unit 15 to High. Thus, the audio signal is output from the
speaker amplifier 21 to the speakers 22R and 22L.
[0091]
When the terminal is connected to the connection unit 11 with the switch 14 enabled, the mute
signal from the mute instructing unit 11 a is set to Low, and the output of the mute control unit
15 is set to Low, whereby the speaker amplifier 21 is obtained. To mute the audio signal to the
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speakers 22R and 22L.
[0092]
When no terminal is connected to the connection unit 11 with the switch 14 disabled, the tuner
unit 1 of this embodiment sets the mute signal from the mute instructing unit 11a to High and
the output of the mute control unit 15 to High. Thus, the audio signal is output from the speaker
amplifier 21 to the speakers 22R and 22L.
[0093]
When the terminal is connected to the connection unit 11 with the switch 14 disabled, the mute
signal from the mute instructing unit 11a is set to low, but since the output of the mute disable
switch 14 is high, mute control is performed. The output of the unit 15 is set to High, and an
audio signal is output from the speaker amplifier 21 to the speakers 22R and 22L.
[0094]
As described above, according to the present embodiment, the mute function when the terminal
is connected to the connection unit 11 can be disabled by the mute disable switch 14.
Thus, for example, when the PC 2 is taken out and used outdoors, the headphone antenna 3 HA
is connected to the connection portion 11, and an audio signal received via this antenna portion
is heard with the headphones, and the PC 2 is used indoors In this case, a dedicated antenna 3A
can be connected to the connection unit 11, and a voice signal received via this antenna can be
heard by the speaker.
[0095]
Therefore, even when the antenna is connected to the connection portion in the receiving device
1 configured to connect the antenna and the headphone to the same connection portion for
simplification, reduction of the number of parts, and space saving, it is selectively An audio signal
can be output from a speaker by disabling the mute function.
[0096]
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25
Sixth Embodiment FIG. 19 is a schematic configuration diagram of a second embodiment of the
present invention.
The present embodiment is different from the above-described first embodiment in that the mute
control unit is configured to execute the mute function when the connection of the headphones is
detected instead of selecting the mute function by the switch. There is.
In addition, since the other structure is substantially the same, the same symbols are given to the
same members, and the description thereof will not be repeated.
[0097]
As shown in FIG. 19, in the present embodiment, any one of a plurality of types (three types in
this example) of terminals such as the antenna 3A, the headphones 3H, or the headphone
antenna 3HA is connected to the connection section 11 The signal is detected, and a mute signal
according to the detection result is output to the speaker amplifier 21 (AND circuit 21a).
[0098]
FIG. 20 is an explanatory diagram of the mute control unit 16 that detects the type of the
terminal.
As shown in FIG. 20, the mute control unit 16 is configured to apply a predetermined voltage (for
example, Vcc = 3 to 5 V) to the contact J1 or J2 (in this example, J1) of the connection unit 11.
With this configuration, when the terminal is not inserted, the output of the contact J1 as the
mute signal is in the High state of the predetermined voltage value.
When the terminal of the headphone 3H or the terminal of the headphone antenna 3HA (FIG. 21
shows an example of the terminal 3HA) is inserted into the connection portion 11, the contact J1
and the left contact of the headphone as shown in FIG. P1 contacts and the output of the contact
J1 as a mute signal becomes a low state equivalent to GND (approximately 0 V).
10-04-2019
26
[0099]
That is, the mute signal to the speaker amplifier 21 is set to Low (the mute function is enabled),
and the output to the speakers 22R and 22L is muted. In this example, the presence or absence
of connection is detected based on the voltage state of the contact point connected to the
headphone, but the present invention is not limited to this, and the resistance value between the
contact point connected to the headphone and GND is measured. In this case, it is sufficient that
the mute signal can be output according to the connection state of the headphones, such as
connection and detection as disconnection when the resistance value exceeds a predetermined
value (for example, infinity).
[0100]
In the present embodiment, the computer 2 is a connection unit 11 for detecting the type of the
output devices 3H and 3HA, and a mute control unit 16 that controls audio output based on the
potential of the contact J1 or J2 of the connection unit 11. The voice output control device in
FIG.
[0101]
On the other hand, when the dedicated antenna terminal 3A is inserted into the connection
portion 11, the contact P1 (P2) on the terminal side in contact with the contact J1 (J2) is NC (No
Contact), so the contact J1 (J2) The output (mute signal) from) remains High.
That is, the mute control unit 16 sets the mute signal to the speaker amplifier 21 to High (the
mute function is disabled) and does not mute the output to the speakers 22R and 22L.
[0102]
As described above, according to the present embodiment, when a terminal is connected to the
connection unit 11, the mute function can be set to be valid or invalid according to the type of
the terminal. Therefore, as in the above embodiment, the antenna and the headphone are
connected to the same connection portion, and the antenna is connected to the connection
portion in the receiving device 1 which achieves simplification, reduction of the number of parts
and space saving. In this case, the mute function can be automatically disabled and an audio
10-04-2019
27
signal can be output from the speaker.
[0103]
Seventh Embodiment FIG. 22 is a schematic configuration diagram of a seventh embodiment of
the present invention. Compared to the first embodiment described above, this embodiment is
configured to execute the mute function when the connection of the headphone portion of the
headphone antenna is detected by the mute controller instead of selecting the mute function by
the switch. Is different. In addition, since the other structure is substantially the same, the same
symbols are given to the same members, and the description thereof will not be repeated.
[0104]
As shown in FIG. 22, in the present embodiment, the headphone antenna 4 </ b> HA is connected
to the connection unit 17. The headphone ante 4HA comprises a base portion 4A and a
headphone portion 4H. The mute control unit 18 detects whether or not the headphone portion
4H of the headphone antenna 4HA is connected to the base portion 4A, and outputs a mute
signal according to the detection result to the speaker amplifier 21 (AND circuit 21a).
[0105]
FIG. 23 is an explanatory view of the headphone antenna 4 HA and the mute control unit 18. As
shown in FIG. 23, the connection unit 17 on the TV tuner side includes contacts J1 to J5 for left
and right audio signals, an antenna, a mute signal, and GND. That is, the TV tuner side terminal
(plug) 41 of the headphone antenna 4HA is provided with the contacts P1 to P5 in contact with
this. The base portion 4A is provided with a line connected to the contacts P1 to P5 from the
terminal 41 to the relay portion 42, and the line connected to the contact P3 functions as an
antenna. In the present embodiment, the audio output control in the computer 2 is the
connection unit 17 for detecting the type of the output devices 4H and 4HA, and the mute
control unit 18 for controlling the audio output based on the potential of the contact of the
connection unit 17. Configure the device.
[0106]
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28
The relay unit 42 has a contact P4 for a mute signal and a contact P5 for GND in parallel. Then,
the mute control unit 18 applies a predetermined voltage (for example, Vcc = 3 to 5 V) to the
contact J3 of the connection unit 17. With these configurations, when the terminal 43 of the
headphone portion 4H is not inserted in the relay unit 42, the contact J4 is in the High state of
the predetermined voltage value. That is, the mute control unit 18 sets the mute signal to the
speaker amplifier 21 to High (the mute function is invalid) and does not mute the output to the
speakers 22R and 22L.
[0107]
On the other hand, when the terminal 43 is inserted into the relay portion 42, as shown in FIG.
24, the contact J4 and the contact J5 are conducted by the terminal 43, and the contact J4 is in a
low state equivalent to GND (approximately 0 V). That is, the mute control unit 18 sets the mute
signal to the speaker amplifier 21 to Low (the mute function is enabled), and mutes the output to
the speakers 22R and 22L.
[0108]
Thus, in the present embodiment, the mute function can be set to be valid or invalid depending
on whether or not the headphone portion 4H is connected to the relay unit 42.
[0109]
The terminal 44 of the dedicated antenna as shown in FIG. 25 may be connected to the
connection portion 17.
In the terminal 44 of this dedicated antenna, the contact J4 for the mute signal is NC. Even in this
case, when the terminal 44 of the dedicated antenna is connected to the connection unit 17, the
contact J3 is maintained at High, so the mute control unit 18 can set the mute signal to High to
invalidate the mute function.
[0110]
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29
Eighth Embodiment FIG. 26 is a schematic view of an eighth embodiment of the present
invention. The present embodiment shows an example of a notebook-type personal computer
(corresponding to an electronic device, hereinafter also referred to as a notebook PC) 2 including
the receiving device 1 similar to that of the above-described first embodiment as an extension
unit. The same components as those in the first embodiment described above are denoted by the
same reference numerals, and the description thereof will not be repeated.
[0111]
In FIG. 26, the notebook PC 2 includes a computer main body 51 and a display unit 53 connected
to the computer main unit 51 by a hinge 52 so as to be openable and closable. Arrows X1 and
X2 indicate the width direction of the notebook PC 2, arrows Y1 and Y2 indicate the depth
direction, and arrows Z1 and Z2 indicate the height (thickness) direction. The computer main
body 51 has a keyboard unit 54 on the upper surface, a CPU and the like inside, and an
expansion bay 56 for accommodating the expansion unit is formed on the lower right side. The
expansion bay 56 has an opening 58 in the right side surface 57 of the computer main body 51
as an insertion port of the expansion unit. The extension bay 56 is in the form of a slit extending
from the opening 58 in the direction of the arrow X2 to the middle of the device, and a connector
59 is provided at the end on the X2 side. In addition, since the connector 59 is located inside the
computer main body 51, a part of the upper surface of the main body 51 is cut away in FIG.
[0112]
Further, as the expansion unit, a tuner unit (receiving device) 1, an FD unit 61, a CD-ROM unit
62, and the like are prepared. These extension units 1, 61, 62 are flat plates that can be fitted
into the extension bay 56, and have a connector 63 that engages with the connector 59 at the tip
of the insertion direction (X2). The units 1, 61, 62 are mounted exclusively in the expansion bay
56, respectively. As a result, the notebook PC 2 can access the expansion unit through the
connector 59 and expand its function.
[0113]
That is, the user selects one of the tuner unit 1, the FD unit 61, and the CD-ROM unit 62
according to the function to be used, and inserts it into the expansion bay 56. The expansion bay
56 may be referred to in various terms, and may also be referred to as a bay, an expansion slot, a
10-04-2019
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multibay, or a multipurpose bay (multipurpose bay).
[0114]
FIG. 27 is an external perspective view of the tuner unit 1, and FIG. 28 is a schematic
configuration diagram of the tuner unit 1. As described above, the outer shape of the housing 10
is substantially flat, and the connector 63 is provided so as to protrude from the end surface in
the insertion direction (X2 direction). Further, the headphone antenna terminal (connection
portion) 11, S-video is provided on the exterior surface 64 located on the rear end surface in the
insertion direction, that is, on the outside surface when fitted in the expansion bay 56 and flush
with the right side surface of the notebook PC 2. An input terminal 65 and a composite input
terminal 66 are arranged in a row.
[0115]
As in the first embodiment described above, the decoding unit 12 generates a video signal and an
audio signal based on a wireless signal (TV broadcast) received through the antenna portion of
the antenna 3A or the headphone antenna 3HA connected to the connection unit 11. And output
to the sound chip 25 through the connector 63.
[0116]
Further, an audio signal from the headphone amplifier 23 is output to the connection unit 11
through the connector 63, and audio is output from the headphones 3H and 3HA connected to
the connection unit 11.
The mute control unit 15 transmits a mute signal to the speaker amplifier 21 (AND circuit 21a)
through the connector 63 based on the mute signal of the mute instruction unit 11a and the
mute control signal of the switch 14. As a result, as in the first embodiment described above,
even when mute disable is selected by the switch 14, the mute function is disabled and the plug
3A, 3HA is connected to the connection unit 11 (Low). The mute signal can be output as High,
and audio can be output from the speakers 22R and 22L.
[0117]
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31
<Modification 1> FIG. 29 shows an example in which the receiving device 1 of the sixth
embodiment (FIG. 19) is an extension unit. In the example of FIG. 29, the mute control unit 16
detects which of plural types (three types in this example) of terminals such as the antenna 3A,
the headphones 3H, and the headphone antenna 3HA is connected to the connection section 11;
A mute signal corresponding to the detection result is output to the speaker amplifier 21 (AND
circuit 21a) via the connector 63. That is, when the mute control unit 16 detects the connection
of the headphone 3H or the headphone antenna 3HA, the mute signal is set to Low to mute the
speaker output, and when the connection to the antenna 3A is detected, the mute signal is set to
High. Do not mute the output. Thus, even when the receiving device 1 of the second embodiment
is used as the extension unit of the present embodiment, the mute function can be appropriately
controlled.
[0118]
<Modification 2> Furthermore, FIG. 30 shows an example in which the receiving device 1 of the
seventh embodiment (FIG. 22) is an extension unit. In the example of FIG. 15, when the mute
control unit 18 detects the connection of the headphone portion 4H of the headphone antenna
4HA connected to the connection unit 17, the mute signal is output to the speaker amplifier 21
through the connector 63 The output is muted. The mute control unit 18 applies a
predetermined voltage (for example, Vcc = 3 to 5 V) to the contact J3 of the connection unit 17
as shown in FIG. 23, and the terminal 43 of the headphone portion 4H is not inserted in the relay
unit 42. Then, the contact J4 is in the high state of the predetermined voltage value. That is, the
mute control unit 18 sets the mute signal to the speaker amplifier 21 to High (the mute function
is invalid) and does not mute the output to the speakers 22R and 22L.
[0119]
On the other hand, when the terminal 43 is inserted into the relay portion 42, as shown in FIG.
24, the contact J4 and the contact J5 are conducted by the terminal 43, and the contact J4 is in a
low state equivalent to GND (approximately 0 V). That is, the mute control unit 18 sets the mute
signal to the speaker amplifier 21 to Low (the mute function is enabled), and mutes the output to
the speakers 22R and 22L. Thus, even when the reception device 1 of the seventh embodiment is
used as the extension unit of the present embodiment, the mute function can be appropriately
controlled.
10-04-2019
32
[0120]
Although an example using a personal computer as an electronic device to which the output
device of the present invention is connected has been described in the above embodiment, the
present invention is not limited thereto, and any device capable of processing information such
as a received signal and an audio signal to be output good. In particular, the present invention is
suitable as an output device for a notebook PC, a space-saving PC, a PDA, a mobile phone, etc. in
which the volume of the device is restricted.
[0121]
Moreover, although the example of the headphone was demonstrated in the said embodiment,
the device which outputs the sound signal from electronic devices, such as not only this but an
external speaker, as a sound may be sufficient. The headphone may be any device such as an
earphone, ear speaker, bone conduction speaker, etc. that can be worn on the head or the like
and can hear audio output personally. That is, the headphone antenna may be any antenna
provided with these devices. Further, in the present invention, the sound may be music, voice,
electronic sound, or the like as long as it is simply sound, and is not limited to the sound of a TV
composed of human voice, music or the like.
[0122]
Although the example which used the personal computer as a receiving system was shown in the
said embodiment, this invention should just be an apparatus which can process information, such
as not only this but the received signal and the audio | voice signal to output. Moreover, although
the example using a headphone was demonstrated in the said embodiment, you may use an
earphone, an external speaker, etc. instead of a headphone. The present invention can be widely
applied to devices that connect an antenna and a headphone, such as a radio, a mobile phone,
and a mobile TV, in addition to a TV tuner. In particular, the present invention is suitable for a
notebook PC, a space-saving PC, a PDA, a mobile phone, etc. in which the volume of the device is
restricted.
[0123]
Reference Signs List 1 tuner unit (reception device) 2 personal computer (electronic device,
reception system) 3H headphone 3HA headphone antenna 31 speaker unit 32 relay unit 33
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cable 34 connection unit (plug) 10 housing 11 connection unit 11a mute instruction unit 12
decoding unit ( Reception unit) 14 Mute disable switch 15 Mute control unit 21 Speaker
amplifier (output unit) 22R, 22L Speaker 23 Headphone amplifier 51 Computer main unit 52
Hinge 53 Display unit 54 Keyboard unit 56 Expansion bay 61 FD unit 62 CD-ROM unit
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