NOM UCAAOATAA
`
`US 20070253579A1
`
`as) United States
`a2) Patent Application Publication co) Pub. No.: US 2007/0253579 Al
`
` Liu et al. (43) Pub. Date: Nov. 1, 2007
`
`
`(54) DUAL MODE HEADSET DEVICE
`
`Publication Classification
`
`(1) ee/00
`
`(2006.01)
`
`(52) U.S. CL. ieee cree cnensecnensneesenees 381/111
`
`(76)
`
`Inventors:
`
`Chun-Hsin Liu, Taipei County
`
`(TW); Meng-Yuan Liu, Taipei
`County (TW); Shih-Wei Fang,
`Taipei County (TW); Kuo-Ching
`Chang, Taipei County (TW);
`Jui-Chi Liao, Taipei County (TW);
`Chi-Hsiang Chen, Taipei County
`(TW)
`Correspondence Address:
`NORTH AMERICA INTELLECTUAL PROP-
`ERTY CORPORATION
`P.O. BOX 506
`MERRIFIELD, VA 22116
`
`ABSTRACT
`(57)
`The invention provides a headset device. The headset device
`includesa first headset, a second headset, and a transmission
`line. The first headset includes a first housing; an interface
`module for receiving an audio signal; a signal processing
`module for separating the audio signal into a first channel
`signal and a second channel signal; an amplifying circuit for
`respectively amplifying the first channel signal and the
`21) second channelsignal to generateafirst amplified signal andAppl. No.: 11/564.853
`
`
`
`
`(21) a second amplified signal; andafirst speaker for outputtingAppl. No ,
`
`
`
`(22)
`Filed:
`Nov. 30. 2006
`audio according to the first amplified signal. The second
`,
`headset includes a second housing, and a second speaker for
`Foreign Application Priority Data
`outputting audio according to the second amplified signal.
`The transmission line is for transmitting the second ampli-
`fied signal to the second headset.
`
`(30)
`
`Apr. 26, 2006
`
`(TW)
`
`ceccccecssesessstesesssnstesees 095207122
`
`110
`
`130
`
`Second headset
`
`switch
`
`First power
`supply device
`
`Power
`
`Second
`speaker
`
`econd power
`supply device
`
`Bose Exhibit 1023
`
`Bosev. Koss
`
`

`

`Patent Application Publication
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`Nov. 1, 2007 Sheet 1 of 9
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`US 2007/0253579 Al
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`Patent Application Publication
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`Nov. 1,2007 Sheet 2 of 9
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`US 2007/0253579 Al
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`100
`
`

`

`Patent Application Publication
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`Nov. 1,2007 Sheet 3 of 9
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`US 2007/0253579 Al
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`Boot the device
`
`Yes
`
`300
`
`
`Are the
`
`
`first headset and the
`second headset connected
`
`throughthe transmission
`
`line ?
`
`Have the first power
`
`
`supply provide thefirst
`Does the
`
`
`headset with power
`voltage of the second
`
`powersupply device reach
`the predetermined
`
`
`value
` Is the first
`9
`
`headset provided
`with sufficient
`power?
`
`Have the second powersupply
`device provide the first headset
`and the second headset with power
`
`
`
`Havethe first power supply device
`and the second powersupply provide
`the first headset and the second
`headset with powerrespectively
`
` first headset
`
`
`and the second headset
`
`provided with
`sufficient
`
`power?
`
`
`Fig. 3
`
`Shut down the device
`
`

`

`Patent Application Publication
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`Nov.1,2007 Sheet 4 of 9
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`US 2007/0253579 Al
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`Connect to the external power supply
`
`400
`
`
`
`
`Is the
`
`
`first headset connected
`
`to the second
`headset ?
`
`
`
`Charge the
`first power
`supply device
`
`Chargethefirst
`powersupply device
`and the second
`powersupply device
`
`
`Is the first
`
`first power supply
`
`
`
`powersupply device
`
`device and the second power
`
`charged to the
`
`supply device charged to
`
`predetermined
`
`
`the predetermined
`
`voltage?
`
`
` End charging
`
`Fig. 4
`
`

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`Patent Application Publication
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`Nov. 1, 2007 Sheet 5 of 9
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`US 2007/0253579 Al
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`
`
`
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`Jamodpuosaspuodas
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`

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`Patent Application Publication
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`Nov.1,2007 Sheet 6 of 9
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`US 2007/0253579 Al
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`900
`
`Fig.6
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`

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`Patent Application Publication
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`Nov.1,2007 Sheet 7 of 9
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`US 2007/0253579 Al
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`153
`
`>L
`
`e>
`
`Fig.7
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`

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`Patent Application Publication
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`Nov.1,2007 Sheet 8 of 9
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`US 2007/0253579 Al
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`Fig.8
`
`©“
`
`o>
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`

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`Patent Application Publication
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`Nov. 1,2007 Sheet 9 of 9
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`US 2007/0253579 Al
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`Fig.9
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`

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`US 2007/0253579 Al
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`Nov. 1, 2007
`
`DUAL MODE HEADSET DEVICE
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`[0001]
`[0002] The invention relates to an audio playing device,
`and more particularly, to a duel mode headset.
`[0003]
`2. Description of the Prior Art
`[0004]
`In the modern world, many multimedia products
`are available on the market. As well as more practical
`functions, computers, cell phones, and MP3 players can
`provide users with many kinds of entertainment. Portable
`electronic products are equipped with headsets in order to
`offer the best entertainment and convenience. There are two
`
`types of commercial headsets available, namely monohead-
`sets and stereo headsets. The former can be applied in hands
`free cell phones. When the headsets are connected to blue-
`tooth modules, users can answer phone calls through the
`headsets directly. In general, for purposes of convenience,
`mono headsets are designed to be small and delicate. Mono
`headsets, however, are not suitable for listening to stereo
`music, not only because they comprise only one earphone
`but also because the soundis limited to the vocal frequency
`range of (300 Hz~3 KHz).
`[0005]
`Stereo headsets are mostly used whenusers wish to
`listen to music as they have two earphones for creating
`stereo sound. There are three types of stereo headsets:
`head-wear headsets, neck-wear headsets, and ear-wear head-
`sets. Most bluetooth stereo headsets in cell phones can
`support the function of answering phonecalls, but they are
`often too large to be smoothly collected. They are therefore
`less practical than mono headsetsif they are applied in hands
`free earphone devices for receiving phonecalls.
`
`SUMMARY OF THE INVENTION
`
`that has the
`[0006] The invention provides a headset
`advantages of convenience,typically characterized by mono
`headsets, and good audio quality, typically characterized by
`stereo headsets. The invention comprises two earphonesthat
`can be separated. Therefore, a user can alternate between
`wearing only one earphone for answering phone calls, and
`wearing two earphones for listening to music. The disad-
`vantages of mono headsets and stereo headsets are thereby
`managed.
`[0007] According to one embodimentof the invention, a
`headset device is disclosed. The headset device includes a
`first headset, a second headset, and a transmission line. The
`first headset includes a first housing; an interface module for
`receiving an audio signal; a signal processing module for
`separating the audio signal into a first channel signal and a
`second channelsignal; an amplifying circuit for respectively
`amplifying the first channel signal and the second channel
`signal
`to generate a first amplified signal and a second
`amplified signal; and a first speaker for outputting audio
`according to the first amplified signal. The second headset
`includes a second housing; and a second speaker for out-
`putting audio according to the second amplified signal. The
`transmission line is for transmitting the second amplified
`signal to the second headset.
`[0008] According to another embodimentofthe invention,
`a headset device is disclosed. The headset device comprises:
`a housing; a second speaker, set
`into the housing,
`for
`outputting a corresponding sound of an amplified signal; and
`
`a transmission line, connected to the speaker, wherein the
`end of the transmission line is connectedto a universalserial
`
`bus (USB) plug.
`[0009] These and other objectives of the present invention
`will no doubt become obvious to those of ordinary skill in
`the art after reading the following detailed description of the
`preferred embodimentthat is illustrated in the various fig-
`ures and drawings.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1 is a block diagram of a headset device
`[0010]
`according to an embodiment ofthe invention.
`[0011]
`FIG. 2 is the exterior view of the headset device in
`FIG.1.
`
`FIG. 3 is a flow chart illustrating how the headset
`[0012]
`device chooses powersupplies.
`[0013]
`FIG. 4 is a flowchart demonstrating how the head-
`set device is charged.
`[0014]
`FIG. 5 is a block diagram of a headset device
`according to the second embodimentof the invention.
`[0015]
`FIG. 6 is an exterior view of the headset.
`[0016]
`FIG. 7 is a3-D schematic diagram ofa line reel set
`into a transmission line according to the second embodiment
`of the invention.
`
`FIG. 8 is a3-D schematic diagram illustrating how
`[0017]
`the line reel collects the transmission line according to the
`second embodiment of the invention.
`
`FIG. 9 is a 3-D schematic diagram of the trans-
`[0018]
`mission line collected into the line reel according to the
`second embodiment of the invention.
`
`DETAILED DESCRIPTION
`
`Please refer to FIG. 1. FIG.1 is a block diagram of
`[0019]
`a headset device 100 according to an embodimentof the
`invention. As shown in FIG. 1,
`the headset device 100
`comprises a first headset 110, a second headset 130, and a
`transmission line 150. An audio signal is transmitted to the
`first headset 110 through a wire/wirelessly. The headset 110
`will producea first amplified signal based on the signal (ex.
`the audio signal corresponding to the left sound track) and
`a second amplified signal (ex. the audio signal correspond-
`ing to the right channel). If the second headset 130 is not
`connected to the first headset 110 by the transmission line
`150, the first headset 110 will output sound corresponding to
`the first amplified signal and be used as a monoheadset. On
`the other hand, if the second headset 130 is connected to the
`first headset 110 by the transmission line 150,
`the first
`headset 110 will
`transmit
`the second amplified signal
`through the transmission line 150 to the second headset 130.
`Whenthis is the case, the first headset 110 will play sound
`corresponding to the first amplified signal and the second
`headset 130 will play sound corresponding to the second
`amplified signal. In this way, the first headset 110 and the
`second headset 130 are combined to function as a stereo
`headset.
`
`the first headset 110 is
`[0020] As shown in FIG. 1,
`installed with an interface module 114, a signal processing
`module 116, an amplifying circuit 118 and a speaker 120.
`The interface module, provided by an external device (such
`as acell phone or an MP3player), is used to receive an audio
`signal S,,..
`[0021] Asignal processing module 116 is connectedto the
`interface module 114 in order to separate the audio signalS,,
`
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`voltage V (V=V2) required to enablethe first headset 110 to
`function. Thereafter, the lifespan of the first power supply
`device 160 is increased.
`
`In the embodiment, the first power supply device
`[0026]
`160 includes batteries and a charger. The power supply 160
`can be charged from an external power supply through the
`port. The second power supply device 162 includesbatteries
`and a charger. In other words, the second power supply
`device can also be charged by an external power supply
`through the powerline 152. Please note that the invention is
`not limited to this embodiment. In other embodiments, even
`if the first headset 110 is without the port 166, and both the
`first power supply device 160 and the second power supply
`162 are regular batteries, such a modification still falls
`within the scope of the invention.
`[0027]
`Please refer to FIG. 3. FIG. 3 is a flow chart
`illustrating how the headset device 100 chooses power
`supplies. The required steps are as follows:
`[0028]
`Step 300: Boot the device.
`[0029]
`Step 310: Are the first headset 110 and the second
`headset 130 connected through the transmission line 150? If
`yes, go to Step 320; otherwise, go to Step 330.
`[0030]
`Step 320: Does the voltage of the second power
`supply device 162 reach the predetermined value? If yes, go
`words, one end of the transmission line is fixed to the line
`to Step 322; otherwise, go to Step 324.
`reel 136, and the other end is connected to a port 122 of the
`[0031]
`Step 322: Have the second power supply device
`first headsets 110 by being pluggedinto it. Please refer to
`providethefirst headset 110 and the second headset 130 with
`FIG. 2. FIG. 2 is the exterior view of the headset device 100
`power. Next, go back to Step 320 to determine whether the
`in FIG. 1. As shownin FIG.2, the first headset 110 hasafirst
`voltage of the second power supply device 162 reaches the
`housing 112 to protect and fix the interior elements(i.e. the
`predetermined value.
`interface module 114, the signal processing module 116, the
`[0032]
`Step 324: Have the first power supply device 160
`amplifying circuit and the first speaker 120). The first
`and the second power supply 162 provide the first headset
`housing 112 further includes the port 122. In the same
`110 and the second headset 130 with power respectively.
`manner, the second headset 130 has a second housing 132 to
`[0033]
`Step 326: Are the first headset 110 and the second
`protect and fix the interior elements(i.e. the line reel 136 and
`headset 130 provided with sufficient power? If yes, go to
`the second speaker 134). If the first headset is used as a
`Step 324; otherwise, go to Step 332.
`mono headset, the interior mechanism provides the same
`[0034]
`Step 328: Havethe first power supply 160 provide
`function as the prior art. If users require a stereo headset,
`the first headset 110 with power.
`however, the transmission line 130 can be pulled out to a
`[0035]
`Step 330: Is the first headset 110 provided with
`suitable length from theline reel 136 and be pluggedinto the
`sufficient power? If yes, go to Step 332; otherwise, go to
`port 122. As a result, the audio line 151 of the transmission
`Step 328.
`line 150 can transmit the second amplified signal to the
`[0036]
`Step 332: Shut down the device.
`second headset 130. When the second speaker 134 is driven,
`[0037]
`In practical usage, the first headset 110 is used as
`the users will hear stereo sound.
`a mono headset and consumesless power, sothe first power
`supply 160 is equipped with a battery of small electric
`capacity. Therefore,
`its volume and weight are reduced
`efficiently. When thefirst headset 110 and the second headset
`130 are combined together to become a stereo headset that
`consumes more power,
`the power supply device 162 is
`equipped with a battery of large electric capacity. In other
`words, when the second headset 130 is connectedto the first
`headset 110 through the transmission line to form a stereo
`headset, the powerline 152 in the transmission line 150 will
`couple the second power supply device 162 to the power
`switch 164. The power switch 164 will then choose the
`second power supply device 162 to provide the first headset
`110 and the second headset 130 with operational voltage
`(Step 322). Thereafter, the life span of the power supply
`device 160 increases. If the power supply provided by the
`second power supply device 162 is insufficient, however, the
`first power supply device 160 and the second power supply
`device 162 will provide the first headset 110 and the second
`headset 130 with power respectively (Step 324). Further-
`more, when thefirst headset 110 is used as a mono headset,
`
`into a first channel signal S, and a second channel signal S,.
`If the first channel signal S, corresponds to the left channel,
`the second channel signal S, will correspond to the right
`channel, and vice versa.
`[0022] An amplifying circuit 118 is connected to the signal
`processing module 116 for amplifying the first channel
`signal S,, which will then be separated intoa first amplified
`signal SA, anda second amplified signal SA,. A first speaker
`120 is connected to the amplifying circuit 118 to output
`sound according to the first amplified signal SA,.
`[0023] The second headset 130 includes a second speaker
`134. When the second headset 130 is connected to the first
`
`headset 110 by the transmission line 150, the second speaker
`134 can receive the second amplified signal and then output
`a corresponding sound. In the embodiment, the transmission
`line 150 includes an audio line 151 and a powerline 152,
`wherein the audio line 151 is used to connect the amplifying
`circuit 118 to the second speaker 134 in orderto transmit the
`second amplified signal SA, to the second headset 130. As
`a result, the other channel can play the sound.
`[0024]
`In the embodiment, the second headset has a line
`reel 136 which can collect the transmission line 150. In other
`
`[0025] As shownin FIG.1, the first headset 110 is further
`equipped with a first power supply device 160 and a power
`switch 164. The second headset 130 is further equipped with
`a second powersupply device 162. The first power supply
`160 provides thefirst headset with power. The power switch
`164 is used to switch the voltage V1 supplied by thefirst
`power supply device 160 to the voltage V2 supplied by the
`second powersupply device 162. Please note that the second
`power supply device 162 is also the power source of the
`second headset 130. In the embodiment, when the first
`headset 110 is used as a mono headsetonly, the power switch
`164 will choosethe first power supply device 160 to provide
`the first headset 110 with a voltage V required to enable the
`first headset 110 to function (V=V1). When the second
`headset 130 is connected to the first headset 110 by the
`transmission line 150 to form a stereo headset, however, the
`powerline 152 in the transmission line 150 will connect the
`second powersupply device 162 to the power switch 164. In
`this case,
`the power switch 164 will choose the second
`power supply 162 to provide the first headset 110 with the
`
`

`

`US 2007/0253579 Al
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`Nov. 1, 2007
`
`the power switch 164 will choose the first power supply
`device 160 to provide the first headset 110 with operational
`voltage (Step 328).
`[0038]
`Please refer to FIG. 4. FIG. 4 is a flowchart
`demonstrating how the headset device 110 is charged. In the
`embodiment,
`the first power supply 160 and the second
`power supply 162 both include batteries and chargers, so the
`headset device 110 is rechargeable. The steps illustrating
`how the headset device 110 is charged are as follows:
`[0039]
`Step 400: Connect to the external power supply.
`[0040]
`Step 410: Is the first headset 110 connected to the
`second headset 130? If yes, go to step 420; otherwise, go to
`step 430.
`Step 420: Charge the first power supply device 160
`[0041]
`and the second power supply device 162.
`[0042]
`Step 426: Are the first power supply device 160 and
`the second power supply device 162 charged to the prede-
`termined voltage? If yes, go to step 440; otherwise, go to
`step 420
`Step 430: Chargethe first power supply device 160.
`[0043]
`Step 435:
`Is the first power supply device 160
`[0044]
`charged to the predetermined voltage? If yes, go to step 440;
`otherwise, go to step 430
`[0045]
`Step 440: End charging.
`[0046] The first headset 110 and the second headset 130
`need to be connected together through the transmission line
`150 before the headset device 100 is charged. Next, once an
`external power supply is connected to the port 160 on the
`first headset 110 (Step 400), the first power supply device
`160 and the second power supply device are charged (Step
`420) by the external powersupply. If the second headset 130
`is not connected to the first headset 110 through the trans-
`mission line 150, thefirst headset 110 can be charged alone
`by the external power supply (Step 400).
`[0047]
`Furthermore, in the embodiment shownin FIG.1,
`the port 122 is set onto the first headset 110, andthe line reel
`130 is set into the second headset 130. One end of the
`transmission line 150 is fixed to the second headset 130 and
`the other end can be pluggedin or pulled out of the port 122.
`This is one of the embodiments for connecting the first
`headset 110 and the second headset 130. In another embodi-
`
`ment of the invention, however, a port (not shown here) is
`set on the second housing 132 of the second headset 130,
`which can be connected to the second speaker 134 for
`receiving the second amplified signal SA2; the two ends of
`the transmission line 150 can be pluggedin or pulled out of
`the port connected to the housing ofthefirst headset 110 or
`the second headset 130. In such a case, the second headset
`130 does not include the line reel 136 mentioned above. This
`
`embodimentcan use the techniquesillustrated by FIG. 3 and
`FIG. 4 for choosing the power supply and charging. In
`another embodimentof the invention, the port 122 shown in
`FIG. 1 is set onto the second housing 112 of the second
`headset 130, and the line reel 136 is set into the first headset
`130. In this case, one end of the transmission line 150 is
`fixed to the first headset 130 and the other end can be
`
`plugged in or pulled out of the port on the second headset
`130. In the same manner, this embodimentcan also use the
`techniques illustrated by FIG. 3 and FIG.4 for choosing the
`power supply and charging. All adjustments mentioned here
`are within the scope of the invention.
`[0048]
`Please refer to FIG. 5. FIG. 5 is a functional
`schematic diagram of the headset device 500 according to
`the second embodimentof the invention. As shownin FIG.
`
`5, the headset device 500 includes a first headset 510, a
`second headset 520, a transmission line 550 anda line reel
`546. The utilization of the first headset 510,
`the second
`headset 520, and the transmission line 550 is similar to that
`mentioned in the first embodiment, and is therefore not
`described again here for the sake of brevity. The difference
`lies in that the second housing 532 of the second headset 530
`does not include the line reel 536, which is set on the
`transmission line in a portable way.
`[0049]
`Please refer to FIG.6. FIG.6 is an exterior view of
`the headset 500. As shown in FIG.6, if the first headset 510
`is used as a monoheadsetor a stereo headset, it functions in
`a similar way to the prior art and is therefore not described
`here for the sake of brevity. Please note that, in this embodi-
`ment, the port 122 andthe port 166 can be integrated to form
`the port 522, which can be connected to an external power
`supply for charging the headset device 500.
`[0050]
`Furthermore, in the above-mentioned embodiment,
`the end plug 153 of the transmission line 150 is a USBplug,
`which can be connected to an external power supply (ex.
`personal computer or a lap-top) for charging the second
`powersupply device 162. Please note that the mechanism of
`charging is the sameasin the first embodiment. In another
`embodimentof the invention, however, the second headset
`130 is not equipped with the second power supply device
`162, so the operation voltage required by the second headset
`130 is provided bythefirst power supply device 160. In the
`same manner, the second headset 530 can be without the
`second power supply 162.
`[0051]
`Please refer to FIG. 7. FIG. 7 is a 3-D schematic
`diagram ofthe line reel 536 set into the transmission line 150
`according to the second embodiment of the invention. As
`shownin FIG.7,the line reel 536 includes a body 710, a first
`indentation 730 and a second indentation 740. The body 710
`includes a hole 720. The body 710 is movable on the
`transmission 150 once the transmission line 150 goes
`through the hole 720. Thefirst indentation 730 is set on the
`body 710 for containing the end plug 153 ofthe transmission
`line 150. The second indentation 740is set on the lateral side
`
`of the body 710 to fix the transmission line 150 that is
`winded around the body 710.
`[0052]
`Please refer to FIG. 8. FIG. 8 is a 3-D schematic
`diagram illustrating how the line reel 536 collects the
`transmission line 150 according to the second embodiment
`of the invention. As shown in FIG. 8, when collecting the
`transmission line 150 with theline reel 536, the transmission
`line 150 is pulled away from the line reel 536 so that the end
`plug 153 can befixedinto thefirst indentation 730. Next, the
`transmission line is winded up onto the second indentation
`740 until it is fixed. The accomplishmentofthe collection of
`the transmission line 150 is shown in FIG. 9. FIG.9 is a3-D
`schematic diagram of the transmission line 150 collected
`into the line reel 536 according to the second embodiment of
`the invention.
`
`Please note that, in the embodiments of the inven-
`[0053]
`tion, the interface module 114is a wireless interface module,
`and more specifically a bluetooth module, which can receive
`the audio signal S,,, wirelessly and can make a wireless
`connection within the standard bluetooth band. Therefore,
`users can answer phonecalls utilizing the headset device
`100. In another embodimentthat also lies within the scope
`of the invention, the interface module can be a wire interface
`module that receives the audio signal S,, through a wire.
`
`

`

`US 2007/0253579 Al
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`Nov. 1, 2007
`
`[0054] Comparedto thepriorart, the headset device of the
`invention is able to be separated into two earphones. There-
`fore, it has the advantages of convenience characterized by
`mono headsets, and the advantage of good audio quality
`characterized by stereo headsets. Users can not only use one
`earphoneas a handsfree receiver of a cell phone but can also
`use two earphones together as a stereo headset.
`[0055] Those skilled in the art will readily observe that
`numerous modifications and alterations of the device and
`
`method may be made while retaining the teachings of the
`invention. Accordingly,
`the above disclosure should be
`construed as limited only by the metes and boundsof the
`appendedclaims.
`Whatis claimedis:
`
`5. The headset device of claim 4, wherein the first power
`supply device further provides the second headset with an
`operating voltage via the transmission line; and when the
`transmission line is not connected to the first port, the other
`end of the transmission line is connected to an external
`power supply to thereby charge the second powersupply.
`6. The headset device of claim 5, wherein the first headset
`further comprises a power switch, and thefirst power supply
`device is connectedto a first input end of the power switch;
`the transmission line comprises an audio line and a power
`line, the audio line is electrically connected to the amplify-
`ing circuit and the second speaker, and the second power
`supply device is connected to a second input port of the
`power switch through the power line; and when a supply
`voltage provided by the second power supply reaches a
`1. A headset device comprising:
`predetermined threshold,
`the power switch chooses the
`a first headset comprising:
`second power supply device to provide thefirst headset with
`a first housing;
`an operating voltage; and if the supply voltage provided by
`an interface module, positionedin the first housing, for
`the second power supply does not reach the predetermined
`receiving an audio signal;
`threshold, the power switch choosesthe first power supply
`a signal processing module, positioned in the first
`device to providethe first headset with an operating voltage.
`housing andelectrically connected to the interface
`7. The headset device of claim 4, further comprising a line
`module, for separating the audio signal intoafirst
`reel for collecting the transmission line.
`channel signal and a second channel signal;
`8. The headset device of claim 7, wherein the line reel
`an amplifying circuit, positioned in the first housing
`comprises:
`and electrically connected to the signal processing
`a body having a hole, wherein the transmission line passes
`module, for amplifying the first channel signal and
`through the hole, and the body is movable on the
`the second channel signal to generate a first ampli-
`transmission line;
`fied signal and a second amplified signal respec-
`a first indentation, positioned on the body, for containing
`lively; and
`the other end of the transmission line; and
`a first speaker, positioned in the first housing and
`electrically connected to the amplifying circuit, for
`a second indentation, positioned on a lateral side of the
`outputting audio according to the first amplified
`body, for fixing flexible portions of the transmission
`signal; and
`line winded around the lateral side of the body.
`9. The headset device of claim 1, wherein the second
`a second headset comprising:
`headset further comprises a second port positioned on the
`a second housing; and
`second housing and electrically connected to the second
`a second speaker, positioned in the second housing and
`speaker, for receiving the second amplified signal; where
`electrically connected to the amplifying circuit, for
`one end of the transmission line is fixed to the first headset
`outputting audio according to the second amplified
`signal; and
`a transmission line, electrically connected to the amplified
`circuit and the second speaker, for transmitting the
`second amplified signal from the first headset to the
`second headset.
`
`2. The headset device of claim 1, wherein thefirst headset
`further comprises a first port positioned on the first housing
`and electrically connected to the amplified circuit, for out-
`putting the second amplified signal;
`the second headset
`further comprises a second port positioned on the second
`housing andelectrically connected to the second speaker, for
`receiving the second amplified signal; and two ends of the
`transmission line are detachably connectedto the first port
`and the secondport.
`3. The headset device of claim 1, wherein thefirst headset
`further comprises a first port positioned on the first housing
`and electrically connected to the amplified circuit, for out-
`putting the second amplified signal, where one end of the
`transmission lineis fixed to the second headset and the other
`end is detachably connected to the first port.
`4. The headset device of claim 3, wherein the first headset
`further comprises a first power supply device, for providing
`at least thefirst headset with an operating voltage; and when
`the first port is not connected to the transmission line, the
`first port can be further connected to an external power
`supply to thereby charge the first power supply device.
`
`and the other end is detachably connected to the secondport.
`10. The headset device of claim 1, wherein the interface
`module is a wireless interface module for receiving the
`audio signal wirelessly.
`11. The headset device of claim 10, wherein the wireless
`interface module is a bluetooth module.
`
`12. The headset device of claim 1, wherein the first
`headset further comprises a first power supply device, for
`providing thefirst headset with an operating voltage; and the
`second headset further comprises a second power supply for
`providing the second headset with an operating voltage.
`13. The headset device of claim 12, wherein the first
`headset further includes a port, positioned on the first
`housing, for connecting an external power supply to thereby
`charge the first power supply device.
`14. The headset device of claim 13, wherein the trans-
`mission line comprises an audio line and a powerline, the
`audio line is electrically connected to the amplified circuit
`and the second speaker, the powerline is electrically con-
`nected to the port and the second powersupply device, and
`whenthe port is connected to the external powersupply, the
`external power supply charges the second powersupply via
`the powerline.
`15. The headset device of claim 13, wherein the second
`headset further comprises a line reel for collecting the
`transmission line.
`
`

`

`US 2007/0253579 Al
`
`Nov. 1, 2007
`
`16. The headset device of claim 12, wherein the second
`headset further comprises a port positioned on the second
`housing for connecting an external power supply to thereby
`charge the second power supply device.
`17. The headset device of claim 16, wherein the second
`headset further comprises a line reel for collecting the
`transmission line.
`18. The headset device of claim 16, wherein the trans-
`mission line comprises an audio line and a powerline, the
`audio line is electrically connected to the amplified circuit
`and the second speaker, the powerline is electrically con-
`nected to the port and the first power supply device, and
`when the port is connected to the external powersupply, the
`external powersupply chargesthe first power supply via the
`powerline.
`19. The headset device of claim 12, wherein the second
`headset further comprises a second powersupply device; the
`first headset further comprises a first power supply device
`and a power switch, the first power supply device is con-
`nected to a first input end of the power switch, the trans-
`mission line comprises an audio line and a powerline, the
`
`audio line is electrically connected to the amplifying circuit
`and the second speaker, the second power supply device is
`connected to a secondinputport of the powerswitch through
`the power line; when a supply voltage provided by the
`second powersupply reaches a predetermined threshold, the
`power switch chooses the second power supply device to
`providethefirst headset with an operating voltage; and when
`the supply voltage provided by the second power supply
`does not reach the predete