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DESCRIPTION JP2011223170

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DESCRIPTION JP2011223170
A sound volume control device capable of listening to sound at an appropriate sound volume
according to a sound output device connected to the output terminal when the output terminal is
shared by a plurality of types of sound output devices, and the sound volume control device
Provided is a display device. According to an embodiment of the present invention, one sound
volume can be selected from a plurality of sound volumes corresponding to a first sound output
device 51 and a second sound output device 52 connected to an output terminal. Therefore, even
when the second audio output device 52 and the first audio output device 51 emitting a smaller
volume than the second audio output device 52 share the output terminal 5, an excessive volume
from the first audio output device 51 Is not released, and it is possible to avoid overburdening
the user's tympanic membrane. [Selected figure] Figure 2
VOLUME CONTROL DEVICE AND DISPLAY DEVICE
[0001]
The present invention relates to a volume control device that controls a volume based on an
audio signal output from an output terminal, and a display device including the volume control
device.
[0002]
BACKGROUND In recent years, mobile terminal devices equipped with a tuner for receiving
broadcast waves are widely used.
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The portable terminal device includes an output terminal for outputting an audio signal, and a
user of the portable terminal device listens to audio based on a broadcast wave by connecting an
audio output device such as an earphone to the output terminal. be able to. According to Patent
Document 1, a portable terminal capable of selecting a manner start mode in which an audio
signal having a volume smaller than that of a normal start mode and a normal start mode in
which an audio signal of a normal volume is output from an output terminal A terminal device
(mobile phone) is disclosed. In the mobile phone described in Patent Document 1, when the user
selects the manner activation mode, the volume output from the earphone is reduced, and sound
leakage to the surroundings is reliably prevented in a public space such as a train. it can.
[0003]
A thin display device installed indoors also has an output terminal as in the case of the mobile
phone, and by connecting an audio output device such as headphones to the output terminal,
sound leakage to the surroundings can be prevented. . Conventionally, the display device has
been provided with an audio output device requiring a larger volume than headphones, such as
an output terminal for connecting an external speaker (monitor out) separately from an output
terminal for connecting headphones, but recently In order to reduce the thickness, a display
device has been proposed in which the headphone and the monitor out share the output
terminal.
[0004]
WO 2008/015864 pamphlet
[0005]
Also in the display device, in order to improve the convenience, it can be considered to be
configured to be able to select the volume related to the audio signal to be output to the output
terminal as in the mobile phone described in Patent Document 1.
However, the headphones and the monitor out have different volumes suitable for use. Therefore,
when a plurality of sound volumes can be selected to correspond to the monitor out, although it
is possible to select the volume corresponding to the monitor out, an audio signal of the volume
corresponding to the monitor out is output. However, when the headphones are connected to the
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output terminal, the headphones emit a sound at an excessive volume regardless of the selection
of the volume. As a result, the user's tympanic membrane may be overloaded, which may cause
discomfort to the user.
[0006]
The present invention has been made in view of such circumstances. When the output terminal is
shared by a plurality of types of audio output devices, the user listens to the audio at an
appropriate volume according to the audio output device connected to the output terminal. It is
an object of the present invention to provide a volume control device that can be used and a
display device provided with the volume control device.
[0007]
A volume control apparatus according to the present invention comprises: an output terminal for
outputting an audio signal; a receiving unit for receiving a volume according to the audio signal
output from the output unit; and the output according to the volume received by the receiving
unit. In the sound volume control device including a setting unit for setting a sound volume
related to an audio signal output from a terminal, a plurality of audio output devices share the
output terminal, and corresponding to each of the plurality of audio output devices The storage
unit is configured to store a volume, the receiving unit is configured to receive any volume from
the volume stored in the storage unit, and the setting unit is configured to receive any volume
received by the receiving unit. It is characterized in that it is set.
[0008]
In the present invention, one volume can be selected from a plurality of volumes corresponding
to the audio output device connected to the output terminal.
Therefore, even when the monitor-out and the headphones that emit a smaller volume than the
monitor-out share the output terminal, selecting an appropriate volume prevents the headphones
from emitting an excessive volume.
Also, by setting the volume of the sound output from the audio output device (such as
headphones and earphones) worn on the ear and the volume of the sound output from the other
audio output device to a predetermined value or less, the ear Connecting either the audio output
device attached to the or any other audio output device to the output terminal does not impose
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an excessive load on the user's eardrum.
[0009]
In the sound volume control device according to the present invention, the plurality of sound
output devices include one sound output device worn on the ear and another sound output
device, and the plurality of sound volumes stored in the storage unit are It comprises detection
means for detecting that an audio output device is connected to the output terminal including
one volume corresponding to the one audio output device and another volume corresponding to
the other audio output device, the detection The setting unit may include means for forcibly
setting the one volume or another volume when it is detected by the means that the audio output
device is connected.
[0010]
In the present invention, when the audio output device is connected to the output terminal, the
preset one volume or another volume is forcibly set.
By setting one sound volume or another sound volume to a predetermined value or less, it is
excessive for the user's eardrum if the audio output device worn on the ear or any other audio
output device is connected to the output terminal. There is no load.
[0011]
The volume control device according to the present invention is a notification means for
notifying that the one or the other volume is forcibly set when the detection means detects that
the audio output device is connected. And the like.
[0012]
In the present invention, the user is urged to select the volume corresponding to the audio output
device connected to the output terminal by notifying the user that one volume or the other
volume is forcibly set. it can.
[0013]
A display device according to the present invention includes the above-described volume control
device and a display unit for displaying an image, and the notification unit is configured to
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forcibly set the one volume or the other volume. It is characterized in that it is displayed on the
screen.
[0014]
In the present invention, when one volume or another volume is forcibly set, the user visually
appeals to the user that the one volume is forcibly set.
[0015]
A display device according to the present invention includes the above-described volume control
device and a display unit for displaying an image, and the receiving unit is used to select one of
the volumes from the respective volumes stored in the storage unit. An option is displayed on the
display unit.
[0016]
In the present invention, selection of the sound volume is made through the user's vision by
displaying the options on the display unit.
[0017]
In the volume control device and the display device according to the present invention, the
volume corresponding to the audio output device connected to the output terminal can be
selected. For example, monitor out and headphones emitting a smaller volume than monitor out
Even when the user shares the output terminal, the user can listen to the audio at a volume
suitable for the audio output device connected to the output terminal because the headphone
does not emit an excessive volume.
[0018]
It is an appearance perspective view showing a display concerning an embodiment.
It is a block diagram showing a sound volume control device of a display concerning a
embodiment.
It is a schematic diagram which shows an example of the operation screen displayed on the
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display part of the display apparatus which concerns on embodiment.
It is a flowchart which shows the sound volume setting preparatory process by the sound volume
control apparatus of the display apparatus which concerns on embodiment.
It is a schematic diagram which shows an example of the alerting | reporting screen displayed on
the display part of the display apparatus which concerns on embodiment.
It is a flowchart which shows the sound volume setting process by the sound volume control
apparatus of the display apparatus which concerns on embodiment.
[0019]
Hereinafter, the present invention will be described in detail based on the drawings showing the
display device according to the embodiment.
FIG. 1 is an external perspective view showing a display device.
In the figure, reference numeral 1 denotes a display device, and the display device 1 is provided
with a front frame 2 having a rectangular frame shape. On the rear side of the front cabinet 2, a
rectangular box-shaped rear cabinet 3 whose front is open is provided. The upper and lower
dimensions and the left and right dimensions of the rear cabinet 3 are substantially the same as
those of the front cabinet 2, and the engaging portion of the front cabinet 2 and the engaged
portion (not shown) of the rear cabinet 3 are engaged.
[0020]
The front cabinet 2 accommodates a rectangular plate-shaped display unit 4. The display unit 4
faces the front of the front cabinet 2. The display unit 4 includes liquid crystal, and is configured
to adjust the light transmittance of light transmitted through the display unit 4 by controlling a
voltage applied to the liquid crystal. Control of the voltage applied to the liquid crystal is
performed via a TFT (Thin Film Transistor). A light source (not shown) such as a light emitting
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diode (LED) or a cold cathode fluorescent tube is disposed on the rear side of the display unit 4.
An output terminal 5 (for example, a jack) for outputting an audio signal is provided on the side
of the front cabinet 2. The output terminal 5 outputs an audio signal controlled by a volume
control device 20 described later.
[0021]
FIG. 2 is a block diagram showing the volume control device 20. As shown in FIG. In FIG. 2, white
arrows indicate dedicated paths of data relating to video and audio. The volume control device
20 includes a control unit 21, a tuner 22, a broadcast signal processing unit 23, a light receiving
unit 24, a decoder 25, a medium signal processing unit 26, and a video output that are mutually
connected via a common bus. A unit 27, an audio output unit 28, a volume setting unit 29, an
audio output switching unit 30, and a mute circuit 31 are provided.
[0022]
Further, the volume control device 20 includes a detection switch 32 for detecting that the input
terminals (for example, plugs) 51 a and 52 a are connected to the output terminal 5, and a
remote control device 33. The remote control device 33 includes a plurality of operation
switches, receives the volume related to the audio signal output from the output terminal 5 by
the operation of the operation switch, and outputs a signal indicating the volume to the light
receiving unit 24. Note that, instead of the remote control device 33, a wired operation unit or
control device may be provided. In this case, the operation unit or the operation device receives
the volume related to the audio signal output from the output terminal 5 and outputs a signal
indicating the volume to the control unit 21.
[0023]
The control unit 21 includes an MPU (Micro Processing Unit), a ROM (Read Only Memory), a
RAM (Random Access Memory), and the like, reads a control program stored in the ROM into the
RAM, and performs processing related to video output and audio output. Run. A detection signal
indicating that the input terminals 51 a and 52 a are connected to the output terminal 5 is input
to the control unit 21 from the detection switch 32. The ROM stores material data for displaying
an image.
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[0024]
The tuner 22 is connected to the antenna 60. The tuner 22 receives a broadcast wave from the
antenna 60 and extracts a broadcast signal of a channel designated by the control unit 21 from
the received broadcast wave. The tuner 22 outputs the extracted broadcast signal to the
broadcast signal processing unit 23. The broadcast signal includes video data and audio data.
[0025]
The broadcast signal processing unit 23 includes, for example, an IF (InterFace) circuit, an audio
detection circuit, a video detection circuit, an A / D (Analog / Digital) conversion circuit (all not
shown), and the like. The broadcast signal processing unit 23 outputs the video data and audio
data of the broadcast signal output from the tuner 22 to the video output unit 27 and the audio
output unit 28, respectively.
[0026]
The light receiving unit 24 receives an infrared signal output from the remote control device 33,
and outputs an operation signal based on the received infrared signal. The control unit 21
controls the tuner 22, the broadcast signal processing unit 23, the decoder 25, the medium
signal processing unit 26, the video output unit 27, the audio output unit 28, the volume setting
unit 29, and the audio output switching unit 30 based on the operation signal. And control the
mute circuit 31.
[0027]
The decoder 25 is connected to a recording medium drive device 61 that reads data from a
recording medium such as an optical disk. The decoder 25 takes in the compressed data from the
recording medium drive device 61, for example, the data compressed according to the MPEG
(Moving Picture Experts Group), and decompresses the data. The decoder 25 outputs the
decompressed data to the media signal processing unit 26. Further, the decoder 25 executes
predetermined processing such as error detection and correction processing on the acquired
data.
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[0028]
The medium signal processing unit 26 extracts video data and audio data from the data input
from the decoder 25, and outputs the extracted video data and audio data to the video output
unit 27 and the audio output unit 28, respectively.
[0029]
The video output unit 27 is connected to the display unit 4 that displays a video.
The display unit 4 includes, for example, a liquid crystal display panel, an organic EL panel, or a
plasma display. The video output unit 27 generates a display signal based on the video data input
from the broadcast signal processing unit 23 or the medium signal processing unit 26. The video
output unit 27 outputs the generated display signal to the display unit 4.
[0030]
The audio output unit 28 generates an audio signal based on the audio data input from the
broadcast signal processing unit 23 or the medium signal processing unit 26, and outputs the
generated audio signal to the volume setting unit 29.
[0031]
The volume setting unit 29 sets the volume of the audio signal input from the audio output unit
28 based on the command from the control unit 21.
The volume setting unit 29 includes a storage unit 29a. In the storage unit 29a, a first initial
sound volume set when the input terminal 51a of the first audio output device (for example,
headphones or earphones) 52 worn on the ear is connected to the output terminal 5, and the
user When the input terminal 52a of an audio output device (hereinafter referred to as monitor
out) 52 that requires a larger volume than the first audio output device 51 worn on the ear when
listening to sound is connected to the output terminal 5 The second initial volume to be set is
stored. An example of the monitor out is an external speaker. The storage unit 29a also has a
storage area, and can set a flag for setting the first initial sound volume or the second initial
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sound volume in the storage area.
[0032]
The first initial sound volume and the second initial sound volume are −36 [dBFS] or less. The
volume is a volume that does not impose an excessive load on the user's eardrum when the audio
output device attached to the ear outputs a sound at the volume, and is a volume that does not
give the user a sense of discomfort.
[0033]
The second initial volume is a volume perceived by the user as substantially the same volume as
when the audio is output at the first initial volume from the audio output device attached to the
ear when the audio is output at the relevant volume from the monitor out. It is.
[0034]
The audio output switching unit 30 switches the output destination of the audio signal input
from the audio output unit 28 to the output terminal 5 or the mute circuit 31.
The audio output switching unit 30 is configured to receive a detection signal from the detection
switch 32, and switches the output destination of the audio signal to the output terminal 5 when
the detection signal is input. Further, the audio output switching unit 30 switches the output
destination of the audio signal based on the command from the control unit 21.
[0035]
The mute circuit 31 is configured to output an audio signal to the built-in speaker 6 through the
amplifier 41. When the mute circuit 31 is in the on state, no audio signal is output from the mute
circuit 31 to the built-in speaker 6. When the mute circuit 31 is in the off state, an audio signal is
output from the mute circuit 31 to the built-in speaker 6.
[0036]
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When a detection signal is input from the detection switch 32 to the control unit 21, the control
unit 21 transmits an on command to the mute circuit 31. The mute circuit 31 that has received
the on command is turned on.
[0037]
When the output destination of the audio signal is switched to the output terminal 5 in the audio
output switching unit 30, the audio signal is output from the audio output switching unit 30 to
the output terminal 5 via the amplifier 40. Further, in the present embodiment, data relating to
video and audio is output through a dedicated path, but is not limited to this. For example, it may
be output via a common bus. .
[0038]
When the volume control device 20 receives from the remote control device 33 a command to
set the volume of the audio signal output from the output terminal 5, the volume control device
20 displays an operation screen 71 (see FIG. 3) described later along with material data stored in
the ROM. The command to be displayed is transmitted to the video output unit 27. The video
output unit 27 generates a display signal for displaying the operation screen 71 based on the
received material data, and outputs the display signal to the display unit 4. The display unit 4
having received the generated display signal displays the operation screen 71.
[0039]
FIG. 3 is a schematic view showing an example of the operation screen 71 displayed on the
display unit 4. The operation screen 71 includes a title section 71a, an explanation section 71b, a
first selection button 71c, and a second selection button 71d. A description portion 71b is
disposed below the title portion 71a, and a first selection button 71c and a second selection
button 71d are arranged laterally on the lower side of the description portion 71b.
[0040]
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The title section 71 a is a title indicating setting of the volume according to the purpose of the
operation screen 71, that is, the audio output device connected to the output terminal 5. Note
that the “headphones” in FIG. 3 correspond to the first audio output device 51 worn on the
ear, and the “monitor out” is larger than the first audio output device 51 worn on the ear when
the user listens to sound. It corresponds to the second audio output device 52 requiring a
volume.
[0041]
The explanation unit 71 b displays an explanation for confirming which of the first audio output
device 51 or the second audio output device 52 is to be connected to the output terminal 5. The
first selection button 71 c is a button that is pressed when the first audio output device 51 is
connected to the output terminal 5. The second selection button 71 d is a button pressed when
connecting the second audio output device 52 to the output terminal 5. The user operates the
remote control device 33 as needed, and presses the first selection button 71 c or the second
selection button 71 d displayed on the operation screen 71.
[0042]
When an audio output device is not connected to the output terminal 5, the volume control
device 20 receives an instruction to set the volume of the audio signal output from the remote
control device 33 from the output terminal 5 to the audio output device. The volume setting preprocessing is executed as a step prior to setting the volume. FIG. 4 is a flowchart showing volume
setting preliminary processing by the volume control device 20.
[0043]
The control unit 21 of the volume control device 20 stands by until an instruction to set the
volume of the audio signal output from the output terminal 5 is received from the remote control
device 33 (step S1: NO). When an instruction to set the volume related to the audio signal output
from the output terminal 5 is received from the remote control device 33 (step S1: YES), the
control unit 21 operates along with the material data stored in the ROM in the video output unit
27. A command to display the screen 71 is transmitted (step S2).
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[0044]
Next, the control unit 21 determines whether a signal indicating that the first selection button
71c has been pressed is received from the remote control device 33 (step S3). When a signal
indicating that the first selection button 71 c has been pressed is received from the remote
control device 33 (step S 3: YES), the control unit 21 accesses the storage unit 29 a of the volume
setting unit 29 to set the first initial volume. A flag for setting is set (step S4). When the first
audio output device 51 such as a headphone or an earphone is connected to the output terminal
5, it is estimated that the user presses the first selection button 71c. Then, the control unit 21
ends the process.
[0045]
When the signal indicating that the first selection button 71 c has been pressed is not received
from the remote control device 33 (step S3: NO), the control unit 21 indicates that the second
selection button 71 d has been pressed from the remote control device 33. It is determined
whether or not a signal to indicate is received (step S5). When the signal indicating that the
second selection button 71 d is pressed is not received from the remote control device 33 (step
S5: NO), the control unit 21 returns the process to step S3. When a signal indicating that the
second selection button 71 d has been pressed is received from the remote control device 33
(step S 5: YES), the control unit 21 accesses the storage unit 29 a of the volume setting unit 29 to
set the second initial volume. The flag for setting is set (step S6). When the second voice output
device 52 (monitor out) is connected to the output terminal 5, it is estimated that the user
presses the second selection button 71d.
[0046]
The control unit 21 can set only one of the above two flags, and can not simultaneously set two
flags.
[0047]
FIG. 5 is a schematic view showing an example of the notification screen 72 displayed on the
display unit 4.
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When the input terminals 51a and 52a are connected to the output terminal 5, the control unit
21 transmits, to the video output unit 27, an instruction to display the notification screen 72
together with the material data stored in the ROM. The video output unit 27 generates a display
signal for displaying the notification screen 72 based on the received material data, and outputs
the display signal to the display unit 4. The display unit 4 having received the generated display
signal displays the notification screen 72.
[0048]
The notification screen 72 includes a title part 72a and an explanation part 72b. An explanatory
section 72b is disposed below the title section 72a. The title section 72a is a title indicating the
purpose of the notification screen 72, that is, the user's attention. The explanation unit 72 b
indicates that the first initial sound volume has been set as the sound volume by connecting the
input terminals 51 a and 52 a, that is, the audio output device, to the output terminal 5. In Figure
5, “The volume was turned down to prevent excessive output. "Corresponds to having set the
first initial volume.
[0049]
Next, volume setting processing by the volume control device 20 will be described. FIG. 6 is a
flowchart showing volume setting processing by the volume control device 20.
[0050]
The control unit 21 of the volume control device 20 stands by until a detection signal indicating
that the input terminals 51a and 52a are connected is input from the detection switch 32 (step
S11: NO). When a detection signal indicating that the input terminals 51a and 52a are connected
is input from the detection switch 32 (step S11: YES), the control unit 21 transmits an on
command to the mute circuit 31 (step S12).
[0051]
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Then, the control unit 21 transmits an instruction to display the notification screen 72 together
with the material data stored in the ROM to the video output unit 27 (step S13). Next, the control
unit 21 accesses the storage unit 29a of the volume setting unit 29, and sets the first initial
volume or the second initial volume with the flag set in the volume setting unit 29 (step S14).
[0052]
Next, the control unit 21 transmits an instruction to display the operation screen 71 together
with the material data stored in the ROM to the video output unit 27 (step S15, see FIG. 3). Then,
it is determined whether a signal indicating that the first selection button 71 c has been pressed
is received from the remote control device 33 (step S 16). When a signal indicating that the first
selection button 71 c has been pressed is received from the remote control device 33 (step S 16:
YES), the control unit 21 accesses the storage unit 29 a of the volume setting unit 29 to set the
first initial volume. It sets to the volume setting part 29 (step S17), and a process is complete |
finished.
[0053]
When the signal indicating that the first selection button 71 c has been pressed is not received
from the remote control device 33 (step S 16: NO), the control unit 21 indicates that the second
selection button 71 d has been pressed from the remote control device 33. It is determined
whether or not a signal to indicate has been received (step S18). When the signal indicating that
the second selection button 71 d is pressed is not received from the remote control device 33
(step S18: NO), the control unit 21 returns the process to step S16. When a signal indicating that
the second selection button 71 d has been pressed is received from the remote control device 33
(step S 18: YES), the control unit 21 sets the second initial volume in the volume setting unit 29
(step S 19).
[0054]
The operation screen displayed in step S15 is not limited to the selective operation screen shown
in FIG. For example, it may be an operation screen displaying a volume bar with an icon
indicating the flagged first initial volume or the second initial volume. In this case, the color,
length, and the like of the volume bar are changed by the operation of the remote control device
33, and the volume changes. Moreover, step S12 may be omitted and the notification screen 72
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may not be displayed.
[0055]
When an audio output device is connected to the output terminal 5, the volume control device 20
receives an instruction to set the volume of the audio signal output from the remote control
device 33 from the output terminal 5, the volume control device 20 executes step S15 to step
S19.
[0056]
In the sound volume control device 20 and the display device according to the embodiment, the
sound volume corresponding to the audio output device connected to the output terminal 5 can
be selected, and for example, monitor out and release a smaller volume than monitor out. Even
when the headphones to be used share the output terminal 5, the user can listen to the audio at a
volume suitable for the audio output device connected to the output terminal 5 because the
headphones do not emit an excessive volume. Can.
[0057]
Further, one volume can be selected from a plurality of volumes corresponding to the audio
output device connected to the output terminal 5.
Therefore, even when the monitor out and the headphones that emit a smaller volume than the
monitor out share the output terminal 5, the headphones do not emit an excessive volume, and
the user's eardrum is overloaded. Can be avoided.
Further, the user can set the volume corresponding to the audio output device to be used
through the operation screen 71, and can set the desired volume reliably.
[0058]
In addition, the first initial volume output from an audio output device (such as headphones and
earphones) worn on the ear and the second initial volume output from another audio output
device have predetermined values, for example, -36 [dBFS] By setting the following, it is possible
to avoid applying an excessive load to the user's tympanic membrane, regardless of which of the
audio output device attached to the ear and the other audio output device is connected to the
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output terminal.
[0059]
In addition, by displaying the options on the display unit 4, the user can reliably select the
volume through vision.
[0060]
In addition, when the audio output device is connected to the output terminal 5, the first initial
sound volume or the second initial sound volume with the flag set is forcibly set, so it is ensured
that the user's eardrum will be overloaded. Can be avoided.
[0061]
Further, by notifying the user that the first initial sound volume or the second initial sound
volume in which the flag is set is set, the user is prompted to select the sound volume
corresponding to the audio output device connected to the output terminal 5 be able to.
Therefore, since the user pays attention to the volume to be set, erroneous setting of the volume
by the user can be reduced.
[0062]
In addition, when the first initial sound volume or the second initial sound volume in which the
flag is set is forcibly set, the notification screen 72 is displayed on the display unit 4, and the first
initial sound volume or the second initial sound volume is forced. By appealing to the user that it
has been set to, the user can surely understand the notification content through vision.
[0063]
Also, when an audio output device other than the audio output device (such as headphones and
earphones) worn on the ear is connected to the output terminal 5, the sound is emitted from the
audio output device regardless of the type of the other audio output device The user who has
listened to the perceived audio perceives that the volume is the same as when listening to the
audio output device worn on the ear, and switching between one audio output device and
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another audio output device Before and after, the user has no sense of incongruity.
Therefore, the user can listen to the audio comfortably.
[0064]
In the volume control device 20 and the display device 1 according to the embodiment, the case
where two types of audio output devices share the output terminal 5 is described, and therefore,
two initial volumes are stored in the storage unit 29a. However, the present invention is not
limited to this, and the storage unit 29a stores a number of initial sound volumes corresponding
to the type of audio output device connected to the output terminal 5.
Therefore, when three or more types of audio output devices share the output terminal 5, three
or more initial sound volumes are stored in the storage unit 29a.
Even in this case, when audio is output at a corresponding initial volume from an audio output
device other than the audio output device attached to the ear, the audio output device other than
the audio output device attached to the ear is attached to the ear The audio is output at a volume
perceived by the user as substantially the same volume as when the audio is output from the
audio output device at the first initial volume.
[0065]
Although the volume control device 20 according to the embodiment is applied to the display
device 1, the volume control device 20 can also be applied to a portable music reproduction
device, a portable telephone having a music reproduction function, a PDA (Personal Digital
Assistant), or the like. Further, although the volume control apparatus 20 according to the
embodiment sets the volume by the remote control device 33 and the operation screen 71, the
means for receiving the setting of the volume is not limited to this. For example, a switch for
volume setting may be provided, and the volume may be set by the switch.
[0066]
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The volume control apparatus 20 according to the embodiment notifies the user that the first
initial volume has been forcibly set by displaying the notification screen 72, but the notification
to the user is limited to this. It is not something to be done. For example, a lamp for notification
may be provided, and the lamp may be turned on, or a notification sound may be output from an
internal speaker.
[0067]
The embodiments described above are exemplifications of the present invention, and the present
invention can be implemented in variously modified forms within the scope defined based on the
claims.
[0068]
Reference Signs List 1 display device 4 display unit 5 output terminal 20 volume control device
24 light receiving unit 29 volume setting unit (setting unit) 29a storage unit 32 detection switch
(detection unit) 33 remote control device (reception unit) 51 first audio output device 52 2 Audio
output device 71 Operation screen 72 Notification screen
11-04-2019
19
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