CN103716563A - Broadcasting receiving device - Google Patents
- ️Wed Apr 09 2014
CN103716563A - Broadcasting receiving device - Google Patents
Broadcasting receiving device Download PDFInfo
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Publication number
- CN103716563A CN103716563A CN201310464628.2A CN201310464628A CN103716563A CN 103716563 A CN103716563 A CN 103716563A CN 201310464628 A CN201310464628 A CN 201310464628A CN 103716563 A CN103716563 A CN 103716563A Authority
- CN
- China Prior art keywords
- signal
- isolator
- tuner
- low noise
- output Prior art date
- 2012-10-04 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003990 capacitor Substances 0.000 claims description 28
- 238000004513 sizing Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/32—Non-reciprocal transmission devices
- H01P1/36—Isolators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/77—Wired systems using carrier waves
- H04H20/78—CATV [Community Antenna Television] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/455—Demodulation-circuits
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention discloses a broadcasting receiving device, which comprises a first isolator that receives the output signal of a first input unit; a second isolator that receives the output signal of a second input unit; and a tuner that reappear one of the output of the first isolator and the second isolator. The first isolator and the second isolator are set in the tuner in a physical way.
Description
Technical field
The present embodiment relates to a kind of broadcast receiver.
Background technology
The signal receiving unit of broadcast receiver comprises antenna, tuner and demodulator.If analog broadcast signal or the digital broadcast signal of tuner by antenna reception channel also send to demodulator by broadcast singal, demodulator carries out demodulation image and voice signal is separated from one another to the broadcast singal receiving from tuner, so that these signals are outputed to respectively to image output unit and voice-output unit.
Conventionally, TV (TV) machine or Set Top Box are optionally used and are received a kind of in the terrestrial tuner of ground TV broadcast and the wired tuner of receiving television broadcasting.Yet, recently, used and received the two two-waveband tuning unit (dual band tuner) of ground TV broadcast and cable tv broadcast.
In other words, because the area such as Brazil, Malaysia, China or Taiwan provides terrestrial broadcast content, therefore need to allow user to watch the dual-port (CATVE+ ground) of terrestrial broadcasting.
Meanwhile, when using cable received television signal, in order to reduce the loss of signal, in middle phone mast, signal amplifier has been installed.In this case, owing in most of the cases not carrying out ground connection, so AC/DC component is applied directly to tuner by signal cable.
In this case, need isolator to avoid outside electric shock with protection tuner.
Fig. 1 is the schematic diagram illustrating according to the broadcast receiver that comprises isolator of correlation technique.
Conventionally, broadcast receiver comprise transmit
signal cable10, to the signal transmitting by
cable10 carry out amplifying
signal amplifier20, by the
isolator30 of the AC/DC component cut-off the signal from
signal amplifier20 output and the
television set50 that comprises the
tuner40 being connected with
isolator30.
About television set 50 each national reception environment in the world, in some country in non-or Asia, supply of electric power and ground connection are unsettled, make electric power may be applied to once in a while ground, or grounding function may stop temporarily.
If use the typical receiving system of
television set50 under such environment, power noise is not applied to ground but by holding wire, directly imports the
tuner40 of
television set50,
tuner40 may be damaged or the whole system of
television set50 may be damaged.
For anti-locking system is because power noise damages,
isolator30 can be placed between the ground path of the system of inputting the cable of broadcast singal or the ground path of antenna and
television set50.
30 is for stoping power noise, and can comprise the inductor that suppresses AC component.
Yet, when adopting
isolator30, if broadcast singal has enough intensity, may not can cause problem.Yet, if the intensity of broadcast singal a little less than, may cause level and/or diagonal noise.
In addition,, due to the resistance of
isolator30 and the resistance of the contact area A between
isolator30 and
tuner40, thermal radiation is concentrated, and the internal circuit of
tuner40 may be burnt out.Correspondingly, the contact area A between
isolator30 and
tuner40 may be badly damaged.
In other words, when transmitting signal by
cable10, although in order to reduce the loss, used
amplifier20, because problem with grounding has caused potential difference.Along with holding wire increases, produced induced electricity magnetic force, make to cause noise.Correspondingly, the contact area A between
isolator30 and
tuner40 may burn out.Therefore, the stability of broadcast receiver may decline, and the life-span of
television set50 may be shortened.
Owing in television set outside, the isolator according to correlation technique being installed, if therefore ultimate consumer does not install isolator, may catch fire.In addition,, although isolator is arranged on television set outside, resistance, because the installation of isolator increases, makes to cause the loss of signal.In addition, for example, due to the ground and the signal ground (antenna: the region of the large contact resistance that the potential difference outside input) causes (that represent due to domestic power supply (television set), contact area between isolator and tuner) thermal radiation of locating, may catch fire.
Summary of the invention
The object of the present embodiment is to provide a kind of broadcast receiver that can improve electric property and unfailing performance.
According to embodiment, a kind of broadcast receiver is provided, this broadcast receiver comprises: the first isolator, the output signal of reception the first input unit; The second isolator, the output signal of reception the second input unit; And tuner, one in the output of the output of the first isolator and the second isolator is reproduced.The first isolator and the second isolator are arranged in tuner in the mode of physics.
Therefore as mentioned above, according to the present embodiment, owing to there is no attached isolator, can prevent that holding wire is because the ground of domestic power supply and the potential difference between signal ground are caught fire.In addition, isolator is arranged in tuner in the mode of physics, the loss of signal is reduced, and improved receiving sensitivity, has improved thus electric property.In addition, stop thermal-radiating cause, therefore can improve the reliability of performance.In addition, can improve voltage standing wave ratio (VSWR).
Accompanying drawing explanation
Fig. 1 is the schematic diagram illustrating according to the broadcast receiver that comprises isolator of correlation technique.
Fig. 2 is the block diagram illustrating according to the broadcast receiver that comprises isolator of the first embodiment.
Fig. 3 a and Fig. 3 b are the circuit diagrams illustrating according to the structure of the isolator of the present embodiment.
Fig. 4 is the block diagram illustrating according to the broadcast receiver that comprises isolator of the second embodiment.
Embodiment
Those skilled in the art of the present technique hereinafter, with reference to the accompanying drawings embodiment are described in detail, so that can easily implement these embodiment.Yet, the embodiment that these embodiment are not limited to the following describes but can there are various modification.In addition,, in order to clearly demonstrate, the parts relevant to embodiment are only shown in the accompanying drawings.Hereinafter, with similar Reference numeral, carry out element like representation class.
In the following description, when predetermined portions " comprises " predetermined parts, unless otherwise indicated, otherwise not getting rid of other parts, predetermined portions can not comprise in addition other parts.
Fig. 2 is the block diagram illustrating according to the broadcast receiver that comprises isolator of the first embodiment.Fig. 3 a and Fig. 3 b are the circuit diagrams illustrating according to the structure of the isolator of the present embodiment.
With reference to Fig. 2,
broadcast receiver500 can comprise:
first signal cable110, receives first signal and first signal is outputed to first signal amplifier (not shown);
Secondary signal cable120, receives secondary signal and secondary signal is outputed to secondary signal amplifier (not shown); First signal amplifier, converts the signal receiving from
first signal cable110 to have the signal of pre-sizing and this signal is outputed to the
first input unit210 to; Secondary signal amplifier, converts the signal receiving from
secondary signal cable120 to have the signal of pre-sizing and this signal is outputed to the
second input unit220 to;
Tuner400, the signal in the middle of the signal that makes to receive from first signal amplifier or secondary signal amplifier with special frequency band passes through, and converts the signal with special frequency band to IF signal; And
demodulator600, convert the IF signal receiving from
tuner400 to baseband signal.
400 can comprise: the
first isolator310, and from amplifying signal first signal amplifier, remove AC/DC component, and the signal without AC/DC component is outputed to
RF switch420; The
second isolator320 is removed AC/DC component from amplifying signal secondary signal amplifier, and the signal without AC/DC component is outputed to
RF switch420;
RF switch420, selects and this signal is outputed to
low noise amplifier430 signal receiving from the
first isolator310 or the
second isolator320; Low noise amplifier (LAN) 430, removes the noise of the signal of being selected by
RF switch420 and noise is converted to the signal with pre-sizing; And tuner IC 410.In other words, the
first isolator310 and the
second isolator320 are arranged in
tuner400 in the mode of physics.
In
tuner400, can comprise demodulator 600.If
tuner400 comprises
demodulator600, form full NIM.If do not comprise
demodulator600 in
tuner400, form half NIM.
Preferably,
first signal cable110 and
secondary signal cable120 can comprise many signal line.
110 can receive first signal and first signal is outputed to first signal amplifier.First signal can be used as CATV signal.First signal amplifier zooms into the first signal receiving from
first signal cable110 signal with pre-sizing, and the signal after amplifying is outputed to the first input unit 210.The mode that the
first input unit210 can output to the first input signal with physics is arranged on the
first isolator310 in
tuner400.
The signal of the
first isolator310 from first signal amplifier receives the conversion with pre-sizing removed unnecessary AC/DC component, and the signal without AC/DC component outputed to
RF switch420 from signal.
As shown in Figure 3 a, the
first isolator310 can comprise the first port P311, the second port P312, the first capacitor C311 and the second capacitor C312.
The first port P311 can be connected to the first signal amplifier that receives signal, and the second port P312 can be connected to the
RF switch420 that output does not have the signal of AC/DC component.
Capacitor can be placed between the first port P311 and the second port P312.A plurality of capacitors can be placed between the first port P311 and the second port P312.As shown in the figure, capacitor can comprise the first capacitor C311 and the second capacitor C312.
The first capacitor C311 is connected between the first port P311 and the second port P312.The first capacitor C311 can comprise high voltage-resistant capacitor, and can comprise a plurality of capacitors that are connected in parallel.
The circuit that the first port P311 is connected to the second port P312 is as first signal line, and first signal line can comprise AC/DC component and broadcast singal.Thereby the first capacitor C311 can lead to the AC/DC component that makes to introduce in first signal line and end to prevent to generate heat too much and prevent from catching fire from first signal line.
The relative terminal of the second capacitor C312 is connected respectively to the circuit of the first port P311 and the second port P312 ground connection, and the second capacitor C312 can comprise a plurality of capacitors that are connected in parallel.
Because the impedance of the second capacitor C312 is close to 0 Ω, therefore can reduce the loss of the signal transmitting by first signal line.Along with the capacity of the second capacitor C312 increases and the quantity of the capacitor that is connected in parallel increases, the impedance of the second capacitor C312 increases.Along with the total capacity increase of capacitor, the impedance of the second capacitor C312 is close to 0 Ω.
Meanwhile, the
first isolator310 has been installed in
tuner400, has been made the impedance can be close to 0 Ω.Therefore, can improve electrical characteristic and reliability, and the noise that can reduce to be caused by external signal.
Referring again to Fig. 2, the signal with pre-sizing of the
first isolator310 from first signal amplifier receives conversion removed unnecessary AC/DC component, and signal outputed to
RF switch420 from the signal conversion.
Meanwhile,
secondary signal cable120 can receive secondary signal and secondary signal is sent to secondary signal amplifier.Secondary signal can be ground signal.Secondary signal amplifier can zoom into the secondary signal receiving from
secondary signal cable120 to be had the signal of pre-sizing and the signal amplifying is outputed to the
second input unit220, and the mode that the
second input unit220 can output to secondary signal with physics is arranged on the
second isolator320 in
tuner400.
The
second isolator320 can receive the signal with pre-sizing changing from secondary signal amplifier, removes AC/DC component, and signal is outputed to
RF switch420 from the signal conversion.
As shown in Figure 3 b, the
second isolator320 comprises the first port P321, the second port P322, the first capacitor C321 and the second capacitor C322.The
second isolator320 has the function identical with the function of the
first isolator310.
In the secondary signal that the channel that
RF switch420 can be selected according to user is selected to be input to the signal of the
first isolator310 and to be input to the
second isolator320 one, and this signal is outputed to
low noise amplifier430.
430 according to set gain, the RF signal from
RF switch420 output is amplified and Inhibitory signal the noise that comprises, signal is outputed to
tuner IC410.
The channel selection broadcasting station that tuner IC 410 can will be watched for user.In other words, the signal with special frequency band of being selected by user in the middle of the signal that tuner IC 410 can only make to input by signal cable passes through, the signal with special frequency band is converted to the intermediate frequency signal with default intermediate frequency band, and IF signal is outputed to
demodulator600.
600 can convert the IF signal receiving from tuner IC 410 to baseband signal.In addition,
demodulator600 makes various signals synchronized with each other, removes the interference signal occurring on channel, and picture signal and voice signal is separated from one another to output to respectively image output unit and voice-output unit.
Fig. 4 is the sectional view illustrating according to the broadcast receiver that comprises isolator of the second embodiment.
With reference to Fig. 4, broadcast receiver 500A can comprise:
first signal cable110, and reception will output to the first signal of first signal amplifier (not shown);
Secondary signal cable120, reception will output to the secondary signal of secondary signal amplifier (not shown); First signal amplifier, converts the signal receiving from
first signal cable110 to have the signal of pre-sizing and this signal is outputed to the
first input unit210 to; Secondary signal amplifier, converts the signal receiving from
secondary signal cable120 to have the signal of pre-sizing and this signal is outputed to the
second input unit220 to;
Tuner400, the signal in the middle of the signal that makes to receive from first signal amplifier or secondary signal amplifier with special frequency band passes through, and this signal is converted to IF signal and IF signal is outputed to
demodulator600; And
demodulator600, convert the IF signal receiving from
tuner400 signal with base band to.
400 comprises: the
first isolator310, and from amplifying signal first signal amplifier, remove AC/DC component and the signal without AC/DC component is outputed to the first low noise amplifier 431; The
second isolator320 is removed AC/DC component and the signal without AC/DC component is outputed to the second low noise amplifier 432 from amplifying signal secondary signal amplifier; The first low noise amplifier 431, except denoising, converts this signal the signal with pre-sizing the signal receiving from the
first isolator310, and the signal with pre-sizing after conversion is outputed to RF switch 421; The second low noise amplifier 432, except denoising, converts signal have the signal of pre-sizing and this signal outputed to RF switch 421 signal receiving from the
second isolator320; Low noise amplifier control unit 433, controls the first low noise amplifier 431 and the second low noise amplifier 432; RF switch 421, selects also this signal to be outputed to tuner
IC410 from the signal of the first low noise amplifier 431 or the second low noise amplifier 432 outputs; And
tuner IC410, the signal receiving from RF switch 421 is converted to IF signal and signal is outputed to demodulator 600.In other words, the
first isolator310 and the
second isolator320 are arranged in
tuner400 in the mode of physics.
In
tuner400, can comprise demodulator 600.If
tuner400 comprises
demodulator600, form full NIM, and if do not comprise in
tuner400 and form half NIM by
demodulator600.
Preferably,
first signal cable110 and
secondary signal cable120 can comprise many signal line.
110 can receive first signal and first signal is outputed to first signal amplifier.First signal can be used as CATV signal.First signal amplifier zooms into the first signal receiving from
first signal cable110 signal with pre-sizing, and the signal after amplifying is outputed to the first input unit 210.The mode that the
first input unit210 can output to the first input signal with physics is arranged on the
first isolator310 in
tuner400.
The
first isolator310 can receive the signal with pre-sizing changing from first signal amplifier, removes unnecessary AC/DC component, and the signal without AC/DC component is outputed to
RF switch420 from this signal.
120 can receive secondary signal and secondary signal is amplified to secondary signal amplifier.Secondary signal can be ground signal.Secondary signal amplifier can zoom into the signal with pre-sizing by the secondary signal receiving from
secondary signal cable120, and the signal after amplifying is outputed to the
second input unit220, and the mode that the
second input unit220 can output to secondary signal with physics is arranged on the
second isolator320 in
tuner400.
The
second isolator320 can receive the signal with pre-sizing changing from secondary signal amplifier, removes unnecessary AC/DC component, and signal is outputed to the second low noise amplifier 432 from the signal conversion.
The first low noise amplifier 431 and the second low noise amplifier 432 are controlled by low noise amplifier control unit 433.
Low noise amplifier control unit 433 can select to control according to user's channel the operation of the first low noise amplifier 431 or the second low noise amplifier 432.Therefore, the low noise amplifier that receives the signal of user's selection operates, and the low noise amplifier of the unselected signal of reception user does not operate.
For example, if user has selected first signal, the first low noise amplifier 431 operates, and with amplifying signal and except denoising, or the second low noise amplifier 432 can not operate.
When the low noise amplifier that first signal and secondary signal are amplified is set respectively, can improves the noiseproof feature of the circuit occurring in RF switch 421, and can improve the sensitivity causing because of induction of signal and decline.
Through the first low noise amplifier 431 or the second low noise amplifier 432 amplifying signals, can be input to RF switch 421.
Low noise amplifier control unit 433 operates in phase with RF switch 421.For example, if user selects first signal, 433 pairs of the first low noise amplifiers 431 of low noise amplifier control unit operate, and RF switch 421 is connected the first low noise amplifier 431 with
tuner IC410, make amplifying signal in the first low noise amplifier 431 can be sent to tuner IC 410.Otherwise, if user selects secondary signal, 433 pairs of the second low noise amplifiers 432 of low noise amplifier control unit operate, and RF switch 421 is connected the second low noise amplifier 432 with
tuner IC410, make amplifying signal in the second low noise amplifier 432 can send to
tuner IC410.
Can omit RF switch 421.
Receive the channel selection broadcasting station that the
tuner IC410 of the output of RF switch 421 can will be watched for user.In other words, the signal with special frequency band of being selected by user in the middle of the signal that
tuner IC410 can only make to input by signal cable passes through, the signal with special frequency band is converted to the intermediate frequency signal with default intermediate frequency band, and IF signal is outputed to
demodulator600.
600 can convert the IF signal receiving from
tuner IC410 to baseband signal.In addition,
demodulator600 makes various signals synchronized with each other, removes the interference signal occurring on channel, and picture signal and voice signal is separated from one another to output to respectively image output unit and voice-output unit.
Although embodiment is described with reference to a plurality of illustrative embodiment in embodiment, should be appreciated that, those skilled in the art of the present technique can design several other modification and the embodiment in the spirit and scope of the principle that can fall into present disclosure.More specifically, part and/or the layout that in the scope of present disclosure, accompanying drawing and claims, can arrange subject combination are carried out variations and modifications.Except the variation of part and/or layout and revising, purposes that can alternative is also apparent for those skilled in the art of the present technique.
Claims (15)
1. a broadcast receiver, comprising:
The first isolator, the output signal of reception the first input unit;
The second isolator, the output signal of reception the second input unit; And
Tuner, reproduces one in the output of the output of described the first isolator and described the second isolator,
Wherein, described the first isolator and described the second isolator are arranged in described tuner in the mode of physics.
2. broadcast receiver according to claim 1, also comprises the RF switch of of selecting in the output of described the first isolator and the output of described the second isolator.
3. broadcast receiver according to claim 2, wherein, described the first isolator comprises the first port being connected with described the first input unit and the second port being connected with described RF switch, and described the second isolator comprises the first port being connected with described the second input unit and the second port being connected with described RF switch.
4. broadcast receiver according to claim 3, wherein, at least one in described the first isolator and described the second isolator also comprises the first capacitor being placed between described the first port and described the second port.
5. broadcast receiver according to claim 3, wherein, described first port of at least one in described the first isolator and described the second isolator and described the second port ground connection.
6. broadcast receiver according to claim 5, wherein, at least one in described the first isolator and described the second isolator also comprises at least one second capacitor, and described the second capacitor has the relative terminal that passes through the connection of its ground connection with described the first port and described the second port.
7. broadcast receiver according to claim 6, wherein, described at least one second capacitor comprises a plurality of capacitors that are connected in parallel with each other.
8. broadcast receiver according to claim 2, wherein, described tuner comprises tuner IC and the low noise amplifier being connected with described tuner IC with described RF switch.
9. broadcast receiver according to claim 1, wherein, described first signal input unit and described secondary signal input unit comprise respectively the signal cable that receives signal from outside.
10. broadcast receiver according to claim 1, also comprises:
First signal amplifier, outputs to described the first input unit by amplifying the first input signal by described the first input signal; And
Secondary signal amplifier, outputs to described the second input unit by amplifying the second input signal by described the second input signal.
11. broadcast receivers according to claim 1, also comprise the demodulator that the output signal of described tuner is changed.
12. broadcast receivers according to claim 1, also comprise:
The first low noise amplifier, receives the output of described the first isolator; And
The second low noise amplifier, receives the output of described the second isolator.
13. broadcast receivers according to claim 12, also comprise the low noise amplifier control unit that described the first low noise amplifier and described the second low noise amplifier are controlled.
14. broadcast receivers according to claim 13, also comprise the RF switch of of selecting in the output of described the first low noise amplifier and the output of described the second low noise amplifier, wherein, described RF switch and described low noise amplifier control unit operate coordinated with each otherly.
15. broadcast receivers according to claim 1, wherein, the first signal that is input to described the first input unit is CATV signal, the secondary signal that is input to described the second input unit is ground signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0109786 | 2012-10-04 | ||
| KR1020120109786A KR20140043974A (en) | 2012-10-04 | 2012-10-04 | Broadcasting receiving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103716563A true CN103716563A (en) | 2014-04-09 |
Family
ID=50409091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310464628.2A Pending CN103716563A (en) | 2012-10-04 | 2013-10-08 | Broadcasting receiving device |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20140043974A (en) |
| CN (1) | CN103716563A (en) |
| TW (1) | TWI612779B (en) |
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| ES2399695B1 (en) * | 2010-12-29 | 2014-02-25 | Telefónica, S.A. | SIGNAL SELECTOR FOR CABLE DIGITAL TELEVISION CHANNELS, OPTICAL NETWORK TERMINAL EQUIPMENT AND METHOD FOR SELECTING DIGITAL TELEVISION CHANNELS |
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2012
- 2012-10-04 KR KR1020120109786A patent/KR20140043974A/en not_active Withdrawn
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2013
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- 2013-10-08 CN CN201310464628.2A patent/CN103716563A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201415825A (en) | 2014-04-16 |
| TWI612779B (en) | 2018-01-21 |
| KR20140043974A (en) | 2014-04-14 |
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Application publication date: 20140409 |