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JP2015002562

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2015002562
A sound output device that does not require an external power source and has a preferable
sound output effect, a portable electronic device using the sound output device, and an audio
reproduction assembly configured of the portable electronic device and the sound output device.
To provide. A loudspeaker apparatus according to the present invention is used by being inserted
into and connected to a portable electronic device provided with a main chip and a changeover
switch. The loudspeaker apparatus includes a first speaker and a connector having a first positive
electrode port and a first negative electrode port, the connector includes a first terminal, a
second terminal, a third terminal, and a fourth terminal, and the first terminal The second
terminal is connected to the first positive electrode port and the first negative electrode port, and
is also connected to the changeover switch, and the third terminal is grounded via a first electric
resistance. The fourth terminal is grounded, and the third terminal and the fourth terminal are
connected to the main chip. [Selected figure] Figure 1
Loudspeaker, portable electronic device and audio playback assembly
[0001]
The present invention relates to a loudspeaker and, more particularly, to a loudspeaker for use in
a portable electronic device and an audio reproduction assembly including the loudspeaker and
the portable electronic device.
[0002]
In recent years, the demand for the volume and sound quality of consumers' portable electronic
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devices has become higher and higher.
However, the volume and sound quality of the speaker installed inside the conventional portable
electronic device do not fully satisfy the consumer's requirements, therefore, connecting the
sound output device to the portable electronic device, it is portable It is a common practice today
to increase the volume of electronic devices and improve the sound quality.
[0003]
The conventional sound output apparatus comprises a speaker, an audio amplification circuit,
and a battery for feeding the audio amplification circuit. However, this sound output device is
inconvenient for carrying because of its heavy weight and large volume, and it is expensive.
Another type of sound output device that does not require a power supply uses a sound output
wrapper of a physical structure to magnify the sound produced by the portable electronic device.
The sound spreading effect is not ideal.
[0004]
In view of the above problems, the present invention does not require an external power source,
and a sound output device having a preferable sound output effect, a portable electronic device
using the sound output device, the portable electronic device, and the sound output The object is
to provide an audio reproduction assembly constituted by the device.
[0005]
In order to solve the above-mentioned problems, the loudspeaker apparatus according to the
present invention is used by being inserted in and connected to a portable electronic device
provided with a main chip and a changeover switch.
The loudspeaker apparatus includes a first speaker and a connector having a first positive
electrode port and a first negative electrode port, the connector includes a first terminal, a
second terminal, a third terminal, and a fourth terminal, and the first terminal The second
terminal is connected to the first positive electrode port and the first negative electrode port, and
is also connected to the changeover switch, and the third terminal is grounded via a first electric
resistance. The fourth terminal is grounded, and the third terminal and the fourth terminal are
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connected to the main chip.
[0006]
Further, in order to solve the above-mentioned problems, in the portable electronic device
according to the present invention, a loudspeaker system including a first speaker, a first
terminal, a second terminal, a third terminal and a fourth terminal is inserted and connected. The
portable electronic device includes a main chip, a switch and a second speaker, the main chip is
electrically connected to the switch, and the switch is connected to the first terminal and the
second terminal. The main chip is connected to the third terminal and the fourth terminal to
detect whether the loudspeaker system is accessed to the portable electronic device and controls
the changeover switch based on the detection result. To establish an electrical connection
between the switch and the first speaker or the second speaker, and when the loudspeaker is
accessed by the portable electronic device, the switch is connected to the first speaker. The
changeover switch is electrically connected to the second speaker when electrically connected
and the loudspeaker is not accessed by the portable electronic device. It is continued.
[0007]
Also, in order to solve the above problems, an audio playback assembly according to the present
invention is connected to a portable electronic device and the portable electronic device, and the
first speaker, the first terminal, the second terminal, the second And a loudspeaker including
three terminals and a fourth terminal. The portable electronic device includes a main chip, a
switch and a second speaker, the main chip is electrically connected to the switch, and the switch
is connected to the first terminal and the second terminal. The main chip is connected to the
third terminal and the fourth terminal to detect whether the loudspeaker system is accessed to
the portable electronic device and controls the changeover switch based on the detection result.
To establish an electrical connection between the switch and the first speaker or the second
speaker, and when the loudspeaker is accessed by the portable electronic device, the switch is
connected to the first speaker. The changeover switch is electrically connected to the second
speaker when electrically connected and the loudspeaker is not accessed by the portable
electronic device. It is continued.
[0008]
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Unlike the prior art, the present invention provides a detection pin inside the portable electronic
device to determine whether the loudspeaker has been accessed by the portable electronic device
and controls the changeover switch to control the portable electronic device. By connecting the
device to the first speaker or the second speaker, the internal sound producing function and the
external sound enhancing function of the portable electronic device are realized. Further, the
structure of the loudspeaker system of the present invention is simple, and power is supplied
from the power source inside the portable electronic device, so that it is not necessary to mount
an extra battery in the loudspeaker system. As a result, the weight of the loudspeaker can be
greatly reduced, and the manufacturing cost of the loudspeaker can be significantly reduced.
[0009]
FIG. 2 is a diagram showing functional modules of a portable electronic device according to an
embodiment of the present invention. It is a figure which shows the structure of the circuit of the
loud speaker concerning embodiment of this invention. FIG. 5 is a frequency response diagram of
the first speaker of the loudspeaker system of the present invention and the second speaker of
the portable electronic device. FIG. 7 is a diagram showing the SN ratio of the first speaker of the
loudspeaker system of the present invention and the second speaker of the portable electronic
device.
[0010]
As shown in FIGS. 1 and 2, a portable electronic device 100 according to an embodiment of the
present invention is a mobile phone, a tablet personal computer, a personal digital assistant
(PDA) or the like. By inserting and connecting the loudspeaker 200 to the portable electronic
device 100, the audio from the portable electronic device 100 can be expanded via the
loudspeaker 200.
[0011]
The loudspeaker 200 includes a first speaker 210 and a connector 220. The connector 220
includes a first terminal 221, a second terminal 222, a third terminal 223, and a fourth terminal
224. The first terminal 221 and the second terminal 222 receive the audio signal transmitted by
the portable electronic device 100. The third terminal 223 is grounded via the first electric
resistance R1. The fourth terminal 224 is also grounded. The first speaker 210 includes a first
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positive electrode port 211 and a first negative electrode port 212. The first positive electrode
port 211 and the first negative electrode port 212 are electrically connected to the first terminal
221 and the second terminal 222, respectively, and output the audio signal received by the
connector 220.
[0012]
The portable electronic device 100 includes a second speaker 10, a changeover switch 20, an
audio amplifier 30, and a main chip 50. The audio amplifier 30 is connected to an audio
conversion circuit (not shown) in the portable electronic device 100 to receive and amplify an
audio signal transmitted by the audio conversion circuit.
[0013]
The second speaker 10 is provided inside the portable electronic device 100 and receives an
audio signal transmitted from the audio amplifier 30. The second speaker 10 also includes a
second positive electrode port 11 and a second negative electrode port 12.
[0014]
The changeover switch 20 is a dual pole double throw (DPDT) type switch, and the first
stationary contact 21, the second stationary contact 22, the first moving contact 23, the second
moving contact 24, the third moving contact 25, the fourth moving A contact 26 and an access
pin 27 are provided. The first stationary contact 21 and the second stationary contact 22 are
respectively connected or switched to the first moving contact 23 and the second moving contact
24 so as to be electrically connected to the third moving contact 25 and the fourth moving
contact 26, respectively. Connected The access pin 27 receives the signal transmitted from the
main chip 50. In the present embodiment, the first moving contact 23 and the second moving
contact 24 are electrically connected to the first positive electrode port 211 and the first
negative electrode port 212, respectively. The third moving contact 25 and the fourth moving
contact 26 are electrically connected to the second positive electrode port 11 and the second
negative electrode port 12, respectively.
[0015]
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The audio amplifier 30 includes a first output pin 31, a second output pin 32 and a third pin 33.
The first output pin 31 and the second output pin 32 are connected to the first stationary contact
21 and the second stationary contact 22, respectively, and output an amplified audio signal. The
third pin 33 receives the signal transmitted from the main chip 50.
[0016]
The main chip 50 includes a first control pin 51, a second control pin 52, a detection pin 53, and
a ground pin 54 as a central processing chip of the portable electronic device 100. The first
control pin 51 is connected to the third pin 33 of the audio amplifier 30, transmits a digital
signal to the audio amplifier 30, and controls an amplification factor of the audio signal
transmitted by the audio amplifier 30. The second control pin 52 is connected to the access pin
27 of the changeover switch 20, and simultaneously controls the first stationary contact 21 and
the second stationary contact 22 of the changeover switch 20, thereby the first stationary
contact 21 and the second stationary contact. 22 is switched so as to be electrically connected to
the first moving contact 23, the second moving contact 24 or to be electrically connected to the
third moving contact 25, the fourth moving contact 26. The detection pin 53 is electrically
connected to the power supply V via the second electric resistance R2. Also, the detection pin 53
detects whether it is inserted and connected to the third terminal 223 of the loudspeaker 200,
and determines whether the loudspeaker 200 is accessed to the portable electronic device 100.
The ground pin 54 is electrically connected to the fourth terminal 224 and grounded via the
fourth terminal 224.
[0017]
When the loudspeaker 200 is accessed by the portable electronic device 100, the detection pin
53 and the ground pin 54 establish an electrical connection. At this time, since the detection pin
53 is grounded via the first electric resistance R1, the detection pin 53 is at a low voltage level
(for example, 1 V), and the main chip 50 is the first static contact of the changeover switch 20.
21 and the second stationary contact 22 are controlled to electrically connect the first stationary
contact 21 and the second stationary contact 22 to the first moving contact 23 and the second
moving contact 24, respectively.
[0018]
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Also, when the loudspeaker 200 is not accessed by the portable electronic device 100, the
detection pin 53 is connected to the power supply via the second electric resistance R2. At this
time, the detection pin 53 is at a high voltage level, and the main chip 50 controls the first
stationary contact 21 and the second stationary contact 22 of the changeover switch 20 to make
the first stationary contact 21 and the second stationary contact 22. Are electrically connected to
the third moving contact 25 and the fourth moving contact 26, respectively.
[0019]
The portable electronic device 100 and the loudspeaker 200 of the present invention jointly
constitute an audio reproduction assembly. The audio playback assembly may be utilized to
provide a speakerphone function to the portable electronic device 100.
[0020]
The operating principles of the portable electronic device 100 and the loudspeaker 200 will be
further described below.
[0021]
When the second speaker 10 installed in the portable electronic device 100 is used, the detection
pin 53 of the main chip 50 is high because the detection pin 53 is directly connected to the
power supply V via the second electric resistance R2. At the voltage level.
At this time, the main chip 50 controls the change-over switch 20 to electrically connect the first
static contact 21 and the second static contact 22 to the third dynamic contact 25 and the fourth
dynamic contact 26, respectively, as well as an audio amplifier. A digital signal (e.g., digital signal
001) is transmitted to 30, and the amplification factor of the audio signal transmitted by the
audio amplifier 30 is controlled. The audio signal amplified by the audio amplifier 30 is
transmitted to the second speaker 10 via the first output pin 31 and the second output pin 32.
[0022]
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When the portable electronic device 100 uses the loudspeaker 200, the first terminal 221, the
second terminal 222, the third terminal 223, and the fourth terminal 224 of the loudspeaker 200
are respectively the first moving contacts of the portable electronic device 100. The second
moving contact 24 is electrically connected to the detection pin 53 and the ground pin 54. Since
the detection pin 53 is grounded via the first electrical resistance R1 and the second electrical
resistance R2 connected in series, the voltage level of the detection pin 53 is lowered to a low
voltage level. At this time, the main chip 50 controls the changeover switch 20 to electrically
connect the first stationary contact 21 and the second stationary contact 22 to the first moving
contact 23 and the second moving contact 24, respectively, and also an audio amplifier. A digital
signal (e.g., digital signal 010) is transmitted to 30, and an amplification factor of the audio signal
received by the audio amplifier 30 is controlled. The audio signal amplified by the audio
amplifier 30 is transmitted to the first speaker 210 via the first output pin 31 and the second
output pin 32.
[0023]
FIG. 3 is a frequency response diagram of the first speaker 210 of the loudspeaker 200 and the
second speaker 10 of the portable electronic device 100. FIG. 4 is a diagram showing the SN
ratio of the first speaker 210 of the loudspeaker 200 and the second speaker 10 of the portable
electronic device 100. In FIG. 3 and FIG. 4, the curve A represents the characteristic curve of the
first speaker 210. Curve B represents the characteristic curve of the second speaker 10. As can
be seen from FIGS. 3 and 4, the volume and sound quality after being expanded by the
loudspeaker 200 are clearly superior to the volume and sound quality emitted by the portable
electronic device 100 itself.
[0024]
The present invention installs the detection pin 53 inside the portable electronic device 100 to
determine whether the loudspeaker 200 has been accessed by the portable electronic device
100. As a result, the main chip 50 of the portable electronic device 100 controls the changeover
switch 20 to connect the portable electronic device 100 to the first speaker 210 or the second
speaker 10, and the internal sound generation of the portable electronic device 100. Implement
the function and the external speaker function.
[0025]
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Further, since the loudspeaker 200 of the present invention utilizes the audio amplifier 30 inside
the portable electronic device 100 and is powered by the power source inside the portable
electronic device 100, an extra battery is provided in the loudspeaker 200. It is not necessary to
attach and feed the audio amplifier 30. As a result, the weight of the loudspeaker 200 can be
greatly reduced, and the manufacturing cost of the loudspeaker 200 can be significantly reduced.
[0026]
10 second speaker 11 second positive electrode port 12 second negative electrode port 20
changeover switch 21 first stationary contact 22 second stationary contact 23 first moving
contact 24 second moving contact 25 third moving contact 26 fourth moving contact 27 access
pin Reference Signs List 30 audio amplifier 31 first output pin 32 second output pin 33 third pin
50 main chip 51 first control pin 52 second control pin 53 detection pin 54 ground pin 100
portable electronic device 200 loudspeaker 210 first speaker 211 first speaker 211 First positive
electrode port 212 first negative electrode port 220 connector 221 first terminal 222 second
terminal 223 third terminal 224 fourth terminal
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