JP3209546

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DESCRIPTION JP3209546
Abstract: An earphone, an electronic device and a wireless earphone are provided. An accessory,
such as a wireless earphone, may have an antenna for transmitting and receiving wireless
signals. The housing for the earphone may have a body portion and an extension portion forming
a stem projecting from the body portion. The earphone may have a speaker 20 aligned with the
speaker port in the body portion. The antenna 40 may have an elongated shape and may extend
along the shaft. The shank may have a plastic housing wall portion. The antenna 40 may be
formed of first and second metal traces on both sides of the printed circuit board. The first metal
trace may form an antenna resonating element arm and may be present between the substrate
and the plastic housing wall portion. The second metal trace may be a ground trace. The feed of
the antenna 40 may be arranged at the connection between the body part and the shank.
[Selected figure] Figure 1
Antenna for wireless earphone
[0001]
This application claims priority to Patent Application No. 14 / 993,548, filed January 12, 2016,
which is hereby incorporated by reference in its entirety.
[0002]
The present application relates generally to electronic devices, and more particularly to
electronic devices having wireless circuitry.
[0003]
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Electronic devices such as cellular telephones, computers, and electronic accessories for other
electronic devices often include wireless circuitry.
For example, earphones that communicate wirelessly with cellular telephones and other devices
are available.
[0004]
When implementing wireless communication circuitry on small devices such as earphones,
difficulties may arise.
If care is not taken, the antenna will not function efficiently. This can make it difficult or
impossible to achieve the desired level of wireless communication performance.
[0005]
Therefore, it is desirable to be able to provide devices such as earphones with improved wireless
circuitry.
[0006]
An accessory such as a wireless earphone may have an antenna for transmitting and receiving
wireless signals.
The accessory may have a housing having a body portion and an extension portion projecting
outwardly from the body portion. The body portion may have a speaker port. The speaker of the
earphone may be mounted within the body portion in alignment with the speaker port. The
extension portion may protrude from the body portion and form a stem that may be gripped by
the user when inserting the earphone into the user's ear and when removing it from the user's
ear.
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[0007]
The antenna of the earphone may have an elongated shape and may extend along the stem. The
shank may have a plastic housing wall surrounding the antenna.
[0008]
The antenna may be formed with first and second metal traces on both sides of the printed
circuit board. The first metal trace may form an antenna resonating element arm and may be
present between the substrate and the plastic enclosure wall of the stem. The second metal trace
may be a ground trace.
[0009]
The antenna may be an inverted F antenna. Return path vias may penetrate the printed circuit
board of the antenna from the first metal trace to the second metal trace. The antenna may have
a feed coupled to the transmission line. The feed may be arranged at the connection between the
body part and the shank.
[0010]
Further features will become more apparent from the accompanying drawings and the following
detailed description of the invention.
[0011]
FIG. 1 is a schematic diagram of an exemplary electronic device having wireless communication
circuitry, according to one embodiment.
FIG. 7 is a diagram of an exemplary antenna of the type that may be used in an electronic device,
according to one embodiment. FIG. 1 is a front perspective view of an exemplary earphone
according to one embodiment. FIG. 4 is a rear perspective view of the example earphone of FIG. 3
showing where the antenna may be placed within the earphone, according to one embodiment.
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FIG. 6A is a top view of an exemplary printed circuit with traces forming an antenna in
accordance with one embodiment. FIG. 6 is a side view of the exemplary antenna of FIG. 5
according to one embodiment.
[0012]
An electronic device of the type that may be equipped with wireless circuitry is shown in FIG. The
device 10 of FIG. 1 may be a wireless earphone or other small portable accessory of the type
used in conjunction with another electronic device such as a cellular telephone, portable
computer, watch, media player, or other host device. It may be a wireless accessory. If desired,
device 10 may be a different type of electronic device. The configuration in which the device 10
is a wireless accessory may be described herein by way of example.
[0013]
Devices such as device 10 may communicate wirelessly with external electronic devices via
wireless communication links. The wireless communication link may be a cellular telephone link
(eg, a wireless link at a frequency of 700 MHz to 2700 MHz or other suitable cellular telephone
frequency), operating at 2.4 GHz, 5 GHz, or other suitable wireless local area network frequency
May be a wireless local area network link, may be a Bluetooth.RTM. Link operating at 2.4 GHz,
may include millimeter wave communication, may include near field wireless communication,
and wireless communication in other communication bands May be included. An arrangement in
which the device 10 operates at 2.4 GHz to support near field communication, such as
Bluetooth.RTM. Communication may be described as an example herein.
[0014]
As shown in FIG. 1, device 10 (eg, an earphone or other accessory) may include control circuitry,
such as storage and processing circuitry 16. The storage and processing circuitry 16 may include
non-volatile memory (eg, flash memory or other electrically programmable read-only memory
configured to form a solid state drive), volatile memory (eg, static or Storage devices such as
dynamic random access memory) may be included. Processing circuitry within the storage and
processing circuitry 16 may be used to control the operation of the device 10. The processing
circuitry may be based on one or more microprocessors, microcontrollers, digital signal
processors, baseband processor integrated circuits, application specific integrated circuits, etc.
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[0015]
Storage and processing circuitry 16 may be used to execute software on device 10. The software
may handle the communication, process the sensor signal, and take appropriate action based on
the processed sensor signal (e.g., turn the feature on or off at the device 10, audio Other device
operations may be handled, such as starting or stopping playback). Storage and processing
circuitry 16 may be used to implement the communication protocol to support interaction with
external devices. Communication protocols that may be implemented using storage and
processing circuitry 16 include wireless local area network protocols (e.g., IEEE 802.11 protocol
and WiGig (registered trademark), sometimes referred to as WiFi (registered trademark)),
Bluetooth ( Other short range wireless communication link protocols such as registered
trademark protocols, cellular telephone protocols, etc. may be mentioned.
[0016]
Device 10 may include a microphone, a speaker, a tone generator, and other audio components
(see, eg, speaker 20). The microphone may collect ambient noise signals for noise cancellation
functions. The speaker may play sound for the user. Tone generators and other sound output
devices may generate other audible outputs. Sensors and other components 22 of the device 10
include proximity sensors (eg, capacitive proximity sensors, optical proximity sensors, etc.), force
sensors, buttons, magnetic sensors, acceleration for measuring the orientation and / or
movement of the device Gauges and other components, strain gauge sensors, vibrators, etc. may
be mentioned. Control circuitry 16 may use input / output circuitry such as speakers 20 and / or
sensors and other components 22 for collecting input from the user and / or the environment
surrounding device 10. In response, control circuitry 16 may transmit a wireless signal to
remove the device and may provide audible, visible, and tactile output to the user.
[0017]
Device 10 may include a battery 26 for providing power to the circuitry of device 10. The battery
26 may be, for example, a rechargeable battery. The battery 26 may be recharged wirelessly (e.g.,
by providing wireless power to the device 10) or may be recharged via a wired connection
between an external device and the device 10. Configurations in which the battery 26 is not
rechargeable (e.g., a replaceable battery in which the battery 26 can not be recharged) may also
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be used.
[0018]
Electronic device 10 may include wireless circuitry to support wireless communication with
external devices. The wireless circuitry may include a high frequency transceiver 24 and one or
more antennas, such as antenna 40. The antenna 40 may have a feed that includes a positive
antenna feed terminal 98 and a ground antenna feed terminal 100. Transmission line 92 may be
used to couple high frequency transceiver circuitry 24 to antenna 40. Transmission line 92 may
have a positive signal path such as line 94 and a ground signal path such as line 96.
Transmission lines in the circuit structure 10 such as the transmission line 92 include coaxial
cable paths, microstrip transmission lines, stripline transmission lines, edge-coupled microstrip
transmission lines, edge-coupled stripline transmission lines, and transmission lines of these
types. The transmission line etc. which are formed from a combination are mentioned. If desired,
filter circuitry, switching circuitry, impedance matching circuitry, and other circuitry may be
inserted into the transmission line.
[0019]
The antenna 40 can be formed using any suitable type of antenna. For example, the antenna 40
is a resonant element formed of a loop antenna structure, a patch antenna structure, an inverted
F antenna structure, a slot antenna structure, a flat plate inverted F antenna structure, a helical
antenna structure, a monopole, a dipole, a hybrid of these designs, etc. It can be an antenna
having If desired, the antenna 40 can include tunable circuitry, and the control circuitry 16 can
be used to select the optimal setting of the tunable circuitry to tune the antenna 40. Antenna
adjustments may be made to tune the antenna 40 to function in the desired frequency range or
otherwise optimize antenna performance. Sensors may be incorporated within the antenna 40 or
elsewhere within the device 10 to collect sensor data used to tune the antenna 40 in real time.
The antenna 40 may also be implemented using a fixed (not tunable) configuration.
[0020]
An exemplary configuration of the antenna 40 is shown in FIG. In the example of FIG. 2, the
antenna 40 is an inverted F antenna and has an inverted F resonant element 100 and an antenna
ground 102. Antenna 40 may be fed by coupling transmission line 92 (FIG. 1) to antenna feed
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108. The antenna feed 108 has a positive antenna feed terminal 98 coupled to the resonating
element arm 104 of the antenna resonating element 100 and has a grounded antenna feed 100
coupled to the ground 102. A return path 106 (eg, a short circuit path) may be coupled between
the antenna resonating element arm 104 and the ground 102 in parallel with the antenna feed
108.
[0021]
The antenna ground 102 may be formed from a ground trace in a printed circuit or other
substrate, a metal portion of a battery, a metal housing structure, a metal portion of an internal
device component, or a conductive ground structure in the device 10 . The antenna resonant
element 100 may be formed from printed circuit metal traces and / or other conductive
structures within the device 10 (e.g., metal foils, metal housing structures, portions of internal
device components, etc.).
[0022]
A perspective view of the device 10 in an exemplary configuration in which the device 10 is a
wireless earphone is shown in FIG. As shown in FIG. 3, the earphone 10 may have a front surface
10F and a back surface 10R. The housing 12 may have a main body portion such as a main body
portion 12B in which the speaker port 122 is formed. The speaker port 122 may face the front of
the earphone 10 (e.g., the port 122 may be formed in the surface of the housing 12 of the front
10F of the earphone 10). An elongated projecting portion, such as housing shaft portion 12T,
may extend outwardly from housing body portion 12B.
[0023]
Body portion 12B may have a shape that fits within the user's ear. Speaker 20 may be mounted
within body portion 12 B and may be aligned with speaker port 122. The speaker 20 may be
used to provide sound to the user's ear. The speaker port 122 may be formed with one or more
openings in the housing 12. One or more plastic or metal mesh layers may be inserted between
the speaker 20 and the opening of the housing 12 (e.g., to help prevent dust and other
contaminants from entering the speaker 20) .
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[0024]
The housing 12 may be formed of metal, plastic, carbon fiber composite material or other fiber
composite, glass, ceramic, other materials, or a combination of these materials. The shank 12T
may be characterized by a length L and a diameter D (or other transverse dimension such as a
width perpendicular to the length L). The aspect ratio (L / D) of the shank 12T is large (eg, at
least three, at least four, at least five, at least ten, at least twenty, etc.). The elongated shape of the
stem 12T may help to allow the user to grip the earphone 10 when removing the earphone 10
from the ear or putting the earphone 10 in the ear. The shank 12T may extend from the body
portion 12B at the back 10R of the housing 12 and may extend along the longitudinal axis 120
of the shank. If desired, the shank 12T may have a curved shape. The exemplary linear shape of
FIG. 3 is merely exemplary.
[0025]
A rear perspective view of the earphone 10 of FIG. 3 is shown in FIG. As shown in FIG. 4, the
antenna 40 may have an elongated shape running along an axis 120 parallel to the length of the
shank 12T. The antenna 40 may extend along the stem 12T from the feed 108 towards the tip
12T 'of the stem 12T.
[0026]
The antenna 40 may overlap with structures such as the battery 26 and other conductive
components disposed within the interior area 124 of the housing 12 if desired. These structures
may include conductive materials that tend to shield the antenna 40. In order to ensure that the
antenna 40 operates in a satisfactory manner, the antenna 40 is below the plastic shank wall or
other dielectric wall in the housing 12 (ie, in the housing 12 in the shank 12T). Can extend
directly below the surface). Thus, the antenna resonating element arm 104 of the antenna 40 is
inserted between the battery and other conductive structures in the area 124 and the dielectric
housing wall. The battery and other conductive structures in the area 124 may form part of the
antenna ground 102.
[0027]
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The antenna feed 108 may be disposed at the junction 12J of the housing 12 between the body
portion 12B and the shank 12T, rather than where it overlaps the area 124 in the body portion
12B. Placing the antenna feed at junction 12J, which is location 108 in FIG. 4 and not elsewhere,
such as location 108 ', minimizes current in battery 26 and other ground plane currents that can
reduce antenna efficiency. It can help.
[0028]
The antenna 40 can be formed of metal traces patterned on a printed circuit. The printed circuit
may be a rigid printed circuit board (e.g., a printed circuit formed of a rigid printed circuit board
substrate material such as glass fiber filled epoxy) or a flexible printed circuit (e.g., a polyimide
flexible layer or other) It may be a printed circuit formed of a sheet of polymer substrate
material.
[0029]
FIG. 5 is a plan view of an exemplary configuration of the antenna 40 in which the antenna 40 is
formed of a printed circuit board. As shown in FIG. 5, the antenna 40 may be formed of metal
antenna traces on the printed circuit board 130, such as metal traces forming the antenna
resonating element arm 104. As shown in FIG. Antenna 40 may be fed using transmission line
92. Transmission line 92 is a positive signal line structure such as conductive line 94 coupled to
positive feed terminal 98 of feed 108 and a ground signal conductive such as conductor 106
coupled to ground feed terminal 100 of feed 108. Body (e.g., see terminals 100A and 100B in
FIG. 5, or other suitable ground feed structure).
[0030]
Terminals 98 and 100 are metal traces in the printed circuit on which antenna 40 is formed (e.g.
vias in substrate 130 such as vias 132, printed circuit in antenna resonant element arm 104 and
ground 102 (e.g. see FIG. 2) Each may be coupled using metal traces or the like on one or more
dielectric layers of the substrate 130). Return paths such as the return path 106 of FIG. 2 may be
formed using one or more vias in the printed circuit board 130 such as the exemplary return
path vias 106A and 106B of FIG.
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[0031]
A side cross-sectional view of the antenna 40 of FIG. 5 taken along line 134 and viewed in
direction 136 is shown in FIG. As shown in FIG. 6, the antenna 40 may have a lower metal trace
layer, such as the lower metal layer 102, which serves as the antenna ground for the antenna 40.
The antenna 40 may also have metal traces such as upper metal traces 104 on the opposite
surface of the printed circuit board 130 (ie, on the upper surface of the printed circuit board
130). The metal trace 104 may function as the antenna resonating element arm 104 of the
antenna resonating element 100 of FIG. If desired, the arm 104 may have multiple branches, may
have bends, and may include built-in capacitors, inductors, switches or other components, and
one of the printed circuits 130. It may be formed in the above layers, or may have other
configurations. The exemplary configuration of FIG. 6 in which the arms 104 are formed of metal
strips on one surface of the substrate 130 and extends parallel to the metal strips forming the
ground 102 on the opposite surface of the substrate 130 is merely illustrative.
[0032]
As shown in FIG. 6, antenna feed terminal 98 may be coupled to arm 104 by a via, such as via
132. Vias may also be used to form return path 106 (FIG. 2), as illustrated by return path via
106A in FIG. Vias, such as the exemplary return path vias 106 A of FIG. 6, may short between the
metal traces forming the resonating element arm 104 and the traces forming the antenna ground
102. The traces on the lower surface of printed circuit board 130 may be adjacent to conductive
structures (e.g., battery 26 and the like) in area 124. The traces on the upper surface of the
printed circuit board 130 may be adjacent to the inner surface 140 of the housing 12 and thus
may be sandwiched between the wall of the housing shaft portion 12T and the substrate 130. In
this configuration, the housing 12 may have a wall formed of a dielectric material such as plastic.
During operation of the antenna 40, an antenna signal may be transmitted through the plastic
wall of the housing 12 and may be received through the plastic housing wall.
[0033]
In one embodiment, a housing having a body portion having a speaker port and having a stem
extending from the body portion, a speaker mounted on the body portion in alignment with the
speaker port, and an antenna in the stem. And an earphone is provided.
[0034]
According to another embodiment, the antenna has an elongated shape and extends along the
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shaft.
[0035]
According to another embodiment, the antenna comprises an inverted F antenna.
[0036]
According to another embodiment, the stem has a plastic housing wall portion, and the earphone
further comprises a conductive component in the stem, the antenna being inserted between the
conductive component and the plastic housing wall portion .
[0037]
According to another embodiment, the antenna comprises: a printed circuit board; a first metal
trace on the printed circuit board adjacent to the plastic housing wall portion; And trace.
[0038]
According to another embodiment, the first metal trace comprises a resonating element arm and
the second metal trace comprises an antenna ground.
[0039]
According to another embodiment, the antenna further includes a return path via penetrating the
printed circuit board between the resonating element arm and the antenna ground.
[0040]
According to another embodiment, the earphone comprises a transmission line coupled to the
antenna, the antenna comprising an additional via passing from the positive signal line of the
transmission line to the first metal trace.
[0041]
According to an embodiment, a dielectric housing having a body portion having a port and
having an elongated projecting portion extending from the body portion along the longitudinal
axis, an electronic component aligned with the port, and an elongated projecting portion And an
antenna within the dielectric housing extending along the longitudinal axis.
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[0042]
According to another embodiment, the elongated projection is characterized by a length, a width
and a ratio of length to width, wherein the ratio of length to width is at least 3.
[0043]
According to another embodiment, the electronic component includes a speaker and the body
portion is configured to be received in the user's ear.
[0044]
According to another embodiment, the antenna includes an inverted F antenna having a
resonating element arm extending along the elongated protrusion.
[0045]
According to another embodiment, an elongated antenna includes a substrate having first and
second opposing surfaces, a first metal trace on the first surface, and a second metal trace on the
second surface. ,including.
[0046]
According to another embodiment, the electronic device includes a return path via extending
through the substrate from the first metal trace to the second metal trace.
[0047]
According to another embodiment, the electronic component includes a speaker and the body
portion is configured to be received in the user's ear.
[0048]
According to an embodiment, a wireless earphone including a speaker, an inverted F antenna,
and a main body portion to which the speaker is attached and having a shaft portion projecting
from the main body portion and to which the inverted F antenna is attached inside Is provided.
[0049]
According to another embodiment, an inverted-F antenna comprises a dielectric substrate having
first and second surfaces, a first metal trace on the first surface, and a second metal trace on the
second surface. And.
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[0050]
According to another embodiment, a wireless earphone includes a return pass via that penetrates
a dielectric substrate from a first metal trace to a second metal trace.
[0051]
According to another embodiment, the wireless earphone includes a battery in a housing, and the
stem includes a plastic wall present adjacent to the first metal trace.
[0052]
According to another embodiment, the body portion is coupled to the stem at the junction of the
housing and the inverted F antenna has a feed at the junction.
[0053]
The contents described above are merely examples, and various modifications can be made by
those skilled in the art without departing from the scope and spirit of the described
embodiments.
The embodiments described above can be implemented individually or in any combination.
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