WO2013125347A1 - 入出力装置 - Google Patents
入出力装置 Download PDFInfo
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- WO2013125347A1 WO2013125347A1 PCT/JP2013/052711 JP2013052711W WO2013125347A1 WO 2013125347 A1 WO2013125347 A1 WO 2013125347A1 JP 2013052711 W JP2013052711 W JP 2013052711W WO 2013125347 A1 WO2013125347 A1 WO 2013125347A1
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- information terminal
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
- H01Q1/46—Electric supply lines or communication lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
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- 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
Definitions
- This disclosure relates to an input / output device in which the function of an input / output terminal used for input / output of an information terminal device is expanded.
- a dedicated receiving antenna is provided in the information terminal device or an antenna input is taken in from an earphone terminal for listening to an audio signal. Either method is used.
- a television broadcast or the like that receives a distance between a high-frequency cutoff inductor provided on the power supply circuit side of the power transmission cable and a high-frequency cutoff inductor provided on the mobile terminal side, etc. Is set to an integral multiple of a quarter wavelength of the carrier frequency. As a result, it is possible to receive television broadcasts in a wide frequency band.
- the present inventors have proposed a receiving device that can obtain sufficient antenna characteristics even when a connector is shared when transmitting another signal with overlapping frequencies to a cable used as an antenna (patent) Reference 2).
- a conventional antenna using an earphone antenna or a power transmission cable requires a dedicated cord or cable for that purpose, and there is a problem that it is difficult to combine it with other signal transmission, for example.
- providing a dedicated antenna in the information terminal device has been an obstacle to reducing the thickness and size of the information terminal device.
- the present disclosure has been made in view of the above problems, and an object of the present disclosure is input / output capable of receiving radio waves such as FM radio and television via a cable connected to an input / output terminal of an information processing terminal device. To provide an apparatus.
- an input / output device is configured such that at least one information terminal of information terminals of an input / output connector provided in an information terminal device functions as a standard information terminal based on a general-purpose interface standard It also functions as an input terminal.
- the standard information terminal has a function as an information terminal for switching an internal operation of the information terminal device.
- the standard information terminal whether it has a function as an information terminal for determining the content of the information by the potential of the input information signal, It preferably functions as an information terminal having a frequency lower than that of the received signal input from the antenna input terminal.
- at least one information terminal is an information terminal indicating a stable potential except for a change point within a connection period, and is an information terminal used for discrimination of a connected device, for example, an ID terminal.
- the output connector is a USB connector.
- the antenna signal input to the antenna input terminal is a broadcast wave signal in one or a plurality of bands of the FM band, the VHF band, the UHF band, and a line to which at least one information terminal is connected (for example, ID Line) is connected to a capacitor that allows the frequencies of these bands to pass.
- a high frequency cutoff element having high impedance with respect to the frequency of the band is connected in parallel with the capacitor to a line to which at least one information terminal is connected.
- the input / output device of the present disclosure it is possible to obtain a favorable transmission characteristic of the television signal up to the gigahertz band exceeding the UHF band by devising the arrangement of the terminals connecting the pins on the board of the USB connector. did it.
- the input / output device of the present disclosure it is not necessary to prepare a new connector space for the antenna on the information terminal device side, so that further downsizing and thinning of the information terminal device can be realized. . Moreover, the effect that the signal of a wide band from MHz band to GHz band can be passed was confirmed.
- FIG. 3 is a diagram showing that the frequency characteristics of the samples (five) of the USB-SMA conversion cable shown in FIG. 2 have substantially the same results.
- FIG. 3 is a diagram showing an eye pattern in which a USB 2.0 differential signal transmission test is performed using the USB-SMA conversion cable shown in FIG. 2. It is a conceptual diagram which shows the other embodiment which connected both the coaxial cable and USB cable for connecting to an external antenna unit to the input / output device of this indication.
- FIG. 8 is a diagram showing the frequency-gain (peak gain) characteristics of the earphone antenna of FIG. 7 measured.
- FIG. 8 is a diagram showing the frequency-gain (peak gain) characteristics of the earphone antenna of FIG. 7 measured.
- FIG. 2 is a diagram illustrating a system configuration example (connection example) compliant with an HDMI standard used in the input / output device of the present disclosure.
- FIG. 10 is a diagram illustrating another modified example of the configuration of the HDMI standard-compliant connector used in the input / output device of the present disclosure.
- the inventors have already proposed many earphone antennas as antennas for receiving radio waves for television broadcasting.
- the diameter of the earphone terminal required for the earphone antenna is an obstacle to further reducing the thickness of the information terminal device.
- USB Universal Serial Bus
- the USB terminal is used to charge the information terminal device from the host computer, and various signal transmissions are performed between the host computer and the information terminal device.
- the inventors thought that in order to solve the above-mentioned problem, it would be possible to receive a television broadcast or the like using a USB terminal that is always installed in an information terminal device. I have tried various thoughts and experiments. As a result, they have devised an input / output device that can receive radio waves for television broadcasting and the like without providing a terminal for an earphone or a dedicated connector for an external antenna.
- FIG. 1 is a diagram illustrating an example of the input / output device of this example.
- a female USB connector for connecting a USB cable is provided on the information terminal device (hereinafter also referred to as “set” or “set substrate”) side.
- the USB connector provided on the set side is hereinafter referred to as “set-side USB-B connector 10”.
- a male USB connector is attached to one end of a coaxial shield wire having an appropriate length, and an SMA (Sub Miniature Type A) connector is attached to the other end.
- SMA Subscribe Miniature Type A
- the SMA connector is normally used as a measurement connector.
- the set-side USB-B connector 10 is a portion indicated by a thick dotted line in FIG. 1
- the cable-side USB-B connector 15 is a portion indicated by a thin dotted line in FIG. Each is connected by 1 to 5 pins and fixed on the substrate. This relationship is the same in FIGS. 6 and 8 described later.
- the set-side USB-B connector 10 female type
- the cable-side USB-B connector 15 male type
- a ⁇ USB-B connector is usually used.
- the B connector is a connector generally used on the set side.
- a USB connector connected to the host computer side is usually an A type that can supply power from the host computer side. USB connectors are used.
- one pin of the set-side USB-B connector 10 is a Vbus / MIC terminal for supplying voltage, and an information terminal device (set) from the host computer side (not shown) via this one pin Is supplied with power, and a voltage is supplied to an earphone microphone or the like connected to the set.
- a ferrite bead 11 for blocking high frequency is connected in series to a line to which one pin of the set-side USB-B connector 10 is connected.
- the ferrite bead may be simply abbreviated as “FB”.
- Pins 2 and 3 of the set-side USB-B connector 10 are terminals of signal lines related to transmission / reception of differential signals.
- 2 pins D-terminal
- the L channel terminal and pin 3 D + terminal
- a common mode choke 12 is connected to a line connecting the 2nd pin and the 3rd pin used in the differential.
- the high frequency signal is blocked by the common mode choke 12 so that only the audio signal passes.
- this high frequency signal may be referred to as an “RF signal” or an “antenna signal”.
- the 4-pin of the set-side USB-B connector 10 has an ID terminal (ID is also an abbreviation of “Identification”, which is an abbreviation of “Identification”) for identifying the type of plug inserted and what the plug is used for. .)
- ID terminal is also an abbreviation of “Identification”, which is an abbreviation of “Identification”
- the 4 pins used as the ID terminal are used as antenna terminals for receiving television broadcasts and the like.
- a capacitor 14 of about 1000 pF is connected in series to the line to which the 4th pin is connected, and the antenna signal supplied to the 4th pin through this capacitor 14 is a tuner circuit (not shown) in the set (ANT in FIG. 1). To supply.
- the 4 pins of the set-side USB-B connector 10 are pins used as normal ID terminals.
- a high-frequency signal such as a television is not necessary. Therefore, in order to remove this, a high-frequency signal cutoff element is connected in parallel with the capacitor 14 to the line connected to the 4 pin. Are connected.
- an ID signal from which a high-frequency antenna signal such as a television signal has been removed is output to an ID identification circuit (not shown) on the set side.
- the pin 5 of the set-side USB-B connector 10 is a ground terminal for grounding, and a line to which the 5 pins are connected is connected to a cable-side USB-B connector 15 described later and an external shield of the set. Grounded.
- the USB-SMA conversion cable shown in FIG. 1 is a so-called coaxial cable in which a male cable-side USB-B connector 15 is connected to a substrate provided at one end of the coaxial shield wire 17.
- a ⁇ USB connector is used similarly to the set-side USB-B connector 10, but an A type or AB type ⁇ USB connector may be used in addition to the B type.
- a resistor 16 is connected between the ID terminal (pin 4) of the cable-side USB-B connector 15 and the ground line. On the set side, the USB connector for any application is connected with the value of the resistor 16. And how the cable is being used. As for the resistor 16, only the earphone microphone is specified at this stage, but it is planned to be used for other purposes than the earphone microphone in the future. However, as will be described later, charging is started by applying a voltage to the Vbus terminal and short-circuiting pins 2 (D ⁇ ) and 3 (D +) as will be described later. It is done by doing.
- the SMA connector 18 shown in FIG. 1 is a terminal to which a cable from an antenna terminal of an external antenna line or a home is connected, and is generally known as a measurement connector.
- the characteristic impedance of the SMA connector 18 is 50 ⁇ , and the SMA connector 18 has been used mainly for microwave radio communication equipment for a long time.
- An experiment for receiving a broadcast wave such as a television signal on the set side using the USB-SMA conversion cable shown in FIG. 1 was conducted.
- a core wire 19 that is an inner conductor of the coaxial shield wire 17 cut to a length of about 10 cm was connected to a 4-pin line of the cable-side USB-B connector 15.
- the metal shield 20 that is the outer conductor of the coaxial shield wire 17 was connected to the 5-pin line of the cable-side USB-B connector 15.
- the 1st to 3rd pins of the cable-side USB-B connector 15 were opened without being connected, and a USB-SMA conversion cable was manufactured.
- FIG. 2 shows a sample of the USB-SMA conversion cable described above.
- 2A is a plan view seen from above
- FIG. 2B is a cross-sectional view of the cable-side USB-B connector
- FIG. 2C is a cross-sectional view of the SMA connector 18
- FIG. 2D is a front view.
- the dimensions in each figure are based on the USB connector and SMA connector standards. 2 that are the same as those in FIG. 1 have the same reference numerals.
- a coaxial shielded wire 17 having a length of about 10 cm and a diameter of 2.6 mm is used as a sample of the produced USB-SMA conversion cable.
- the cable-side USB-B connector 15 having a rectangular cross section has a narrow side width of 7 mm, and is expected to become thinner in the future. It is suitable as.
- FIG. 3 is a plot of the results.
- the VHF band of 90 to 108 MHz (1 to 3 ch), 170 to 222 MHz (4 to 12 ch) and the UHF band of 470 to 770 MHz (13 to 62 ch) are used.
- 90 to 108 MHz is sometimes referred to as a VHF-L (low band) band
- 170 to 222 MHz is sometimes referred to as a VHF-H (high band) band.
- the pass characteristics of high-frequency signals in all the bands of these television broadcasts are substantially the same for the five samples of the USB-SMA conversion cable.
- all five samples of the USB-SMA conversion cable have an insertion loss of 1 dB or less in any frequency band of the FM band (70 to 90 MHz), VHF band, and UHF band, indicating that transmission deterioration is small. Yes. From this, it was found that there is no practical problem even if the ID terminal of a normal USB cable is used for receiving an antenna signal of a television or the like.
- FIG. 4 is a diagram showing an eye pattern 40 for checking whether the USB function is maintained.
- the eye pattern 40 is also called an eye diagram or an eye opening ratio, and is obtained by sampling and overlaying a large number of signal waveform transitions and displaying them graphically.
- the horizontal axis represents time, and the vertical axis represents voltage.
- the waveform is good quality, and conversely, the position (timing and voltage) of the signal waveform is shifted. Is a waveform of poor quality.
- those having poor transmission characteristics have a central hexagonal shape (template 43) that is thin and flat, and its area is reduced.
- the differential signal waveform is required to surround the hexagonal template 43.
- the USB signal transmission clock is 480 Mbps. This test is called an eye pattern test (or eye diagram test) because the relationship between the signal line and the template resembles the shape of an open human eye.
- Example of connection between coaxial cable and USB cable> 5 and 6 show an embodiment in which two coaxial cables similar to the USB-SMA conversion cable shown in FIG. 1 and a normal USB cable are connected to the input / output device.
- FIG. 5 is a schematic configuration diagram
- FIG. 6 is a diagram showing the connection relationship in detail.
- FIG. 5 shows an example in which the other end of the coaxial cable 17 is connected to a two-pole plug 23 having a diameter of 3.5 mm instead of the SMA connector 18 (see FIG. 1).
- This two-pole plug 23 is referred to as “ ⁇ 3.5 two-pole plug”.
- an SMA connector 18 or an F connector usually used in a television it is also possible to use an SMA connector 18 or an F connector usually used in a television.
- the cable for receiving a broadcast wave such as a television signal shown in FIGS. 1, 2, 5 and 6 is distinguished from a USB cable and simply referred to as a “coaxial cable”.
- a USB cable 21 is connected to the cable-side USB-B connector 15 in addition to the coaxial cable (coaxial shielded wire) 17.
- the other end of the USB cable 21 is connected to a cable-side USB-A connector 22 for connection to the host computer side.
- various information signals including audio signals and the like are supplied.
- the other end of the coaxial cable 17 is connected to an F connector that is normally used for television input, and is connected to an antenna terminal in the home.
- F connector that is normally used for television input
- antenna terminal in the home.
- the two-pole plug 23 is used by being inserted into a two-pole jack 26 that is a connector of the substrate 24 of the antenna unit having the rod antenna 25.
- the 2-pole jack 26 of the board 24 is referred to as “ ⁇ 3.5 2-pole jack”.
- FIG. 6 is a detailed diagram showing the details of the connection relationship of FIG. 5 at the pin level of the USB input / output terminal.
- the same members as those shown in FIG. The structure of the set-side USB-B connector 10 is the same as that shown in FIG.
- a cable-side USB-B connector 15 is connected to a set-side USB-B connector 10 which is a USB input / output device.
- the coaxial cable (USB-SMA conversion cable) 17 is connected to the cable-side USB-B connector 15.
- a normal USB cable 21 is connected to one end of the cable-side USB-B connector 15 in addition to the coaxial cable 17 to which the two-pole plug 23 is connected.
- a B-type cable-side USB-B connector 15 is connected to one end of the USB cable 21, and an A-type cable-side USB-A connector for connecting to the host computer is connected to the other end. 22 is connected.
- the pin 1 to which the power supply line of the USB cable 21 is connected is connected to the high frequency cutoff FB 27 on the set side, and is similarly connected to the high frequency cutoff FB 30 on the host side.
- the FBs 27 and 30 are ferrite beads (FB) that can maintain high-frequency characteristics even when a current flows, and are different in characteristics from FBs 29 and 32 that are connected to a ground line described later. *
- Common mode chokes 28 and 31 are connected to the set side and the host side, respectively, on the 2nd and 3rd pins to which the differential signal line of the USB cable 21 is connected. Further, the FB 29 is connected to the set side and the FB 32 is connected to the host side of the ground line of the USB cable 21. The FBs 29 and 32 inserted in the ground line are arranged with a magnetic material around the coil to create a state where the impedance is high in terms of high frequency, that is, a state where there is a large amount of high frequency loss. Then, the high frequency current is changed to heat to remove the high frequency current. However, the host side FB 30, the common mode choke 31, and the FB 32 connected to the ground line are assumed to maintain the USB characteristics and the RF characteristics of the coaxial cable 17. If there is little, there is no problem even if it is not.
- the board to which the cable-side USB-B connector 15 is connected needs to be separated as much as possible so as not to interfere with each other when used as a common board.
- the first substrate 33 to which the coaxial cable 17 is connected and the second substrate 34 to which the USB cable 21 is connected are separated.
- USB cable 21 and the coaxial cable 17 are attached to the cable-side USB-B connector 15, communication and charging with the host computer using the USB cable 21 and the antenna unit using the coaxial cable 17 are performed. Broadcast waves from can be received simultaneously.
- FIG. 7 is a diagram showing an earphone antenna 50 having a total length of about 1 m, which is produced by connecting a coaxial shield wire 51 having a length of 37.5 cm and earphone cords 55 and 56 having a length of 62.5 cm.
- the earphone antenna 50 is a kind of monopole antenna, and constitutes an antenna capable of receiving radio waves in the VHF band of television broadcasting with the entire length of the coaxial shield wire 51 and the earphone cords 55 and 56, and the coaxial shield wire 51. This part constitutes an antenna that can receive UHF radio waves of television broadcasting.
- the male cable-side USB-B connector 53 attached to the coaxial shield wire 51 for connection to the set is the same as the cable-side USB-B connector 15 of FIG. 1, but as will be described later with reference to FIG.
- the connection configuration of pins 1 to 5 is different.
- the connector connected to the earphone cords 55 and 56 is not the SMA connector 18 shown in FIG. 2, but a connection portion 54 for connecting the normal earphone cords 55 and 56 and the coaxial shield wire 51 through the substrate. Yes, this connecting portion 54 is molded with resin. This connection portion 54 becomes a boundary portion between the earphone cords 55 and 56 and the coaxial shield wire 51.
- the earphone cords 55 and 56 are integrally connected up to the fixing portion 59, but are separated from the fixing portion 59 and connected to the L-side earphone 57 and the R-side earphone 58, respectively.
- the coaxial shielded wire 51 and the earphone cords 55 and 56 are formed by resin molding via a substrate.
- the total length of the earphone antenna 50 was about 1 m, and the length of the coaxial shield wire 51 was 37.5 cm.
- the total length of the earphone antenna is determined in consideration of the fact that the frequency moves to a lower level when used on a human body. That is, with this earphone antenna 50, the length of the coaxial shield line is 37.5 cm of about 1/4 wavelength ( ⁇ / 4) of 200 MHz so that both the VHF-H band and UHF band of television broadcasting can be received. Adjusted. Further, since the UHF band (440 to 770 MHz) corresponds to a harmonic band of approximately 200 MHz, the earphone antenna 50 can also receive radio waves of television broadcasting in the UHF band.
- FIG. 8 is a diagram showing a specific connection relationship of the same earphone antenna 60 as the earphone antenna 50 shown in FIG.
- the cable-side USB-B connector 62 connected to the coaxial shield wire 61 is a male connector, which is connected to the female set-side USB-B connector 10.
- the female set-side USB-B connector 10 attached to the set substrate side is the same as that shown in FIG.
- the length of the coaxial shield wire 61 is 37.5 cm, which is the same length as the coaxial shield wire 51 of FIG.
- the cable-side USB-B connector 62 provided on the coaxial shield wire 61 side differs from the cable-side USB-B connector 15 in FIG. 1 in that each terminal (1 to 5 pins) of the cable-side USB-B connector 62 is different. Pin).
- the male cable-side USB-B connector 62 disposed on the coaxial shielded wire 61 side board is provided to face the female set-side USB-B connector 10 disposed on the set board side.
- One pin of the cable-side USB-B connector 62 is a terminal for supplying power, and is connected to a microphone 63. Further, an FB 64 for blocking high-frequency signals is connected in series to this line.
- Pins 2 and 3 of the cable-side USB-B connector 62 are connected to a signal line for differential transmission of R and L audio signals, and FBs 65 and 66 for cutting off high frequency signals are also connected to this line. Yes.
- the FB 67 is also connected to the 5-pin ground line of the cable-side USB-B connector 62.
- the DC resistance of the FB 67 inserted into the ground line is desirably 1 ⁇ or less.
- the resistance value of the FB 67 it is preferable to set the resistance value of the FB 67 to 1 ⁇ or less. However, if the audio isolation cannot be obtained with this 1 ⁇ value, the FB 67 value can be set to 0 ⁇ . That is, although the antenna characteristics are deteriorated, a 4-pin ID terminal can be used as an antenna terminal without the FB 67. Further, if it is acceptable that the high band characteristics of the UHF are slightly deteriorated, the function as an antenna terminal can be maintained without inserting the capacitor 71d between the ID terminal line and the ground line.
- the 1-pin, 2-pin, and 3-pin lines of the cable-side USB-B connector 62 are connected to the ground line (5-pin line) via the microphone 63 and the L and R earphones 68 and 69. .
- the metal shield 72 that is the outer conductor of the coaxial shield wire 61 is connected to the ID terminal (4 pins) of the cable-side USB-B connector 62.
- the metal shield 72 connected to the ID terminal is a shield line different from the ground line.
- the resistor 70 is inserted between a line to which the ID terminal (4 pins) of the cable-side USB-B connector 62 is connected and a ground line to which the 5 pins are connected.
- the resistance value of the resistor 70 is different depending on the type of the cable-side USB-B connector 62, in other words, for what purpose the connector is used. Therefore, by detecting the value (resistance value) of the resistor 70, it is possible to detect that a USB connector having an antenna function such as television broadcasting has been inserted.
- the signal line constituting the R earphone cable and the signal line constituting the L earphone cable are each provided with one antenna. It functions as a line.
- radio waves are transmitted between the core wire of a coaxial cable and a ground wire, and the transmitted antenna signal is input to a receiver such as a television broadcast by a pin jack connector.
- the transfer clock used for USB 2.0 signal transfer is 480 Mbps, and this clock signal operates between the signal line and the ground line. Therefore, if the ground of the USB cable is used as an antenna for a television signal, Is in a state where a USB 480 Mbps clock signal is superimposed in addition to the RF signal of a television or the like. For this reason, when the USB cable is used as an antenna for television broadcasting, it cannot be used for transmission of high-frequency signals such as television broadcasting with the same connection as a conventional earphone antenna. Since the USB 480 Mbps clock corresponds to a frequency of 240 MHz, the VHF-H band is particularly adversely affected.
- the voltage line (1 pin), the signal line (2 pins, 3 pins), and the ground line (5 pins) ) And the ID line (4 pin), capacitors 71a to 71d for promoting high-frequency coupling are inserted.
- the values of the capacitors 71a to 71d are approximately 1000 pF.
- FBs 64 to 67 are connected to the line to which the 1st to 3rd pins of the cable-side USB-B connector 62 are connected and to the line to which the 5th pin is connected. Through these lines, television signals and the like are connected.
- the antenna signal is configured not to be input to the set-side USB-B connector 10. That is, it is cut off at a high frequency.
- the earphone antenna 60 shown in FIG. 8 uses the ID terminal line for television broadcast antenna input, no ferrite bead (FB) is connected to the ID line to which the 4 pins are connected. .
- the FBs 64 to 66 are connected to the line to which the 1st to 3rd pins of the cable-side USB-B connector 62 are connected and the ground line to which the 5th pin is connected. Is not connected to FB. That is, only the 4-pin line is not cut off at high frequencies, and an antenna signal of a television or the like is sent to the set side through this line.
- the resistor 70 is connected between the ID line to which the 4 pins of the cable-side USB-B connector 62 are connected and the ground line. Since the resistance value of the resistor 70 is usually high impedance (several hundred k ⁇ ), the ID line and the ground line are open in terms of high frequency, and do not affect the antenna characteristics of the ID line. It should be noted that after passing through the FBs 64 to 67 connected to each line other than the ID line, they are coupled by a capacitor such as a coupling capacitor. In this case, a high-frequency current is applied to each terminal. As a result, the antenna characteristics deteriorate. *
- Table 1 and FIG. 9A show the frequency-gain characteristics of the earphone antenna shown in FIG. 7 in the VHF band of television broadcasting. As shown in Table 1 and FIG. 9A, it was confirmed that in the VHF band of 190 to 220 MHz, a gain characteristic of ⁇ 10 dB or more was exhibited in vertical polarization, and a characteristic of ⁇ 16 dB or more was exhibited in horizontal polarization.
- the vertical and horizontal polarizations showed gain characteristics of ⁇ 12 dB or more.
- FIG. 10 is a diagram illustrating a structure of a substrate for obtaining a gigahertz band pass characteristic in the input / output device of the present disclosure.
- FIG. 10A is a perspective view of the entire substrate
- FIGS. 10B and 10C are views showing the positional relationship between two parallel ground planes (ground layers) arranged with a dielectric in between and USB input / output terminals.
- This board is a ⁇ USB plug board on which the coaxial shielded wire (coaxial cable) 17 and the cable-side USB-B connector 15 shown in FIG. 1 are mounted.
- the dielectric 8 is interposed between the upper ground plane 81 and the lower ground plane 82. 3 is arranged.
- the ground plane 81 and the ground plane 82 are connected by a through hole 77 and are kept at the same potential.
- the upper ground surface 81 is divided into a ground surface 81a and a ground surface 82b, and an electrode 84 to which a USB ID terminal (4 pins) is connected is provided therebetween.
- FIG. 10B shows the electrodes provided on the upper (upper) ground plane 81
- FIG. 10C shows the positions of the electrodes provided on the lower (lower) ground plane 82. 10B and 10C are perspective views seen from above.
- the 2-pin (D-terminal) electrode 72, the 4-pin (ID terminal) electrode 74, and the shield terminal 76 of the USB connector are arranged on the same plane as the ground planes 81a and 81b on the upper surface.
- An electrode 75 is disposed.
- the shield terminal 76 is directly connected to the ground plane 81a, and the electrode 75 for the 5-pin (GND terminal) is directly connected to the ground plane 82.
- the grounding surfaces 81 a and 81 b on the top surface and the grounding surface 82 on the bottom surface are electrically connected by a through hole 77.
- the positional relationship between the electrodes indicated by the solid lines and the electrodes indicated by the dotted lines in the perspective view is shown.
- the top two-pin electrode 72 is disposed between the bottom one-pin electrode 71 and the three-pin electrode 73.
- a 4-pin electrode 74 on the top surface is disposed between the 3-pin electrode 73 and the 5-pin electrode 75 on the bottom surface.
- the shield electrode 76 on the upper surface connected to the case is disposed outside the position of the 5-pin electrode 75 on the bottom surface.
- the attachment method of a USB connector may be the same as the conventional method
- FIG. 11 shows the results of measuring the frequency characteristics of a sample (one piece) of a USB-SMA conversion cable manufactured using the ⁇ USB plug substrate having the substrate structure shown in FIG.
- a semi-rigid cable was connected to an ID terminal (4 pins) between ⁇ USB connectors, and transmission characteristics were examined in consideration of transmission characteristics in the gigahertz (GHz) band.
- FIG. 11 shows the result.
- Semi-rigid means a cable that cannot be bent freely in order to transmit a high frequency, that is, a “slightly rigid” cable, and is commonly used by high frequency parties.
- USB input / output device as an embodiment of the present disclosure has been described above.
- the present disclosure is not limited to the USB input / output device, and can also be applied to an input / output device using, for example, an MHL (Mobile High-definition Link) interface other than USB.
- MHL Mobile High-definition Link
- USB-On-The-Go USB-On-The-Go
- the ID terminal of the host (side) device is basically connected to GND via a resistor of 10 ⁇ or less, and the peripheral side
- the ID terminal of the device (peripheral device) is to be connected to GND via OPEN or a resistance of 100 K ⁇ or more.
- each device is operated with its own specifications, such as using different resistance values for each device.
- connection is one-to-one (1: 1), but multiple devices can be connected via a host device or USB hub, and these devices are switched and connected. You can also In this case, multiple: 1, 1: multiple, multiple: multiple connections are possible, and the switching is controlled by a host device or the like.
- connection target devices in addition to so-called host devices (information processing devices) such as PCs and so-called peripheral devices (information terminal devices) such as various portable devices, USB chargers for supplying power Etc. are also included.
- the connection partner device includes various devices connected to other interface standards via a host device or an expansion device connection hub.
- the ID terminal of the USB connector has a stable potential (constant voltage) that can identify the connection partner device at that time except when the connection partner device is changed (change point, change timing). Will show. Further, since it is only necessary to obtain resolution for discrimination by potential change (displacement), this ID terminal is a terminal that hardly affects the operation (in this case, information discrimination) even if the potential slightly changes. Further, since the potential of the ID terminal changes only when the connection partner device is switched, the change point or the change frequency can be reduced.
- this ID terminal is a terminal for switching the internal operation of the information terminal device having an input / output device (or input / output connector) having this ID terminal by knowing the type of the counterpart device. Therefore, it can be said that the ID terminal is a terminal to which an information signal called a so-called operation mode switching signal is supplied.
- USB input / output device as an embodiment of the present disclosure has been described above.
- the present disclosure is not limited to the USB input / output device, and can be applied to an input / output device based on an interface standard other than USB.
- USB-On-The-Go USB-On-The-Go
- USB-OTG USB-On-The-Go
- the ID terminal of the host (side) device is connected to GND via a resistor of 10 ⁇ or less.
- the ID terminal on the peripheral device side is to be connected to GND via OPEN or a resistor of 100 K ⁇ or more.
- each device has its own specifications, such as using different resistance values for each device.
- the ID terminal indicates a stable potential (constant voltage) that can identify the connection partner device at that time except when the connection partner device is switched (change point, change timing). Become. Further, since it is only necessary to obtain a resolution for discrimination by potential change (displacement), even if it is slightly displaced, the terminal does not easily affect the operation (in this case, information discrimination). In addition, since it changes only when the connected device is switched, the change point (change frequency) can be reduced, and even if the reception frequency by the antenna is low, there is a high possibility that it will be superposed in frequency with the frequency domain of the received signal. This is a terminal that requires less (almost never appears).
- this ID terminal is a terminal for switching the internal operation of the information terminal device provided with the input / output device (or input / output connector) having this ID terminal by knowing the type of the connection partner. Therefore, it can be said that the ID terminal is an information terminal for an information signal that can also be called a so-called operation mode switching signal.
- USB interface
- the terminal type such as the ID terminal is ⁇ type
- the terminal type such as D ⁇ terminal and D + terminal operating at a predetermined frequency is ⁇ type
- the power terminal is compared as a ⁇ type.
- the ⁇ type terminal is the most stable terminal in terms of potential because it does not change (displace) in terms of potential in view of its original function. Therefore, if only this is considered, it can be said that it is the most suitable terminal for the antenna terminal.
- the ⁇ type terminal is the terminal that you do not want to be displaced the most, for example, there is a concern that the received signal received as an antenna becomes power supply noise and makes the operation of the information terminal equipment unstable. In some cases, ⁇ -type terminals are preferable.
- the ⁇ -type terminal is an information terminal whose information content is discriminated by the electric potential, so it can be easily designed so that information can be discriminated even if it is slightly displaced.
- the ⁇ -type terminal can easily maintain a stable potential except at the changing point and has few displacement points, so that the influence of the received signal by the antenna is small (almost unaffected).
- This ⁇ -type terminal is a normal interface standard and has the largest number of types and the number of terminals, and is the type of terminal that is most easily used if it can be used as an antenna combined terminal.
- the ⁇ type terminal is preferable when the reception frequency is to be wide. This is because, as described above, the ⁇ type terminal has a small number of displacement points and can easily maintain a stable potential except at the change point, and therefore, interference with the received signal by the antenna is small (almost unaffected). It is.
- interface standards other than USB Similar to the USB standard, general-purpose (or becoming more general-purpose) interface standards include, for example, MHL (Mobile High-definition Link), HDMI (High-Definition Multimedia Interface), Thunderbolt (Light Peak) interface, and other standards. is there.
- MHL Mobile High-definition Link
- HDMI High-Definition Multimedia Interface
- Thunderbolt Light Peak
- FIG. 12 is a diagram comparing the functions of the ⁇ USB terminal and the MHL terminal.
- the MHL shown in FIG. 12 is a standard that uses a USB signal line for transmission of a digital video signal.
- the MHL terminal is It is assumed to be used in combination with a USB connector. Therefore, MHL terminal, a control signal corresponding directly to the ID terminal of ⁇ USB standards: a terminal (CBUS C ard B us Slot US B), which have as the ⁇ -type terminal, the CBUS terminal as an antenna sharing terminal It can be used.
- CBUS C ard B us Slot US B
- the CBUS terminal is used for transmission of a single-line control signal. That is, the CBUS is used for setting and controlling the output device side (source) and the reception device side (sink) in a user use environment in various audiovisual devices.
- CBUS is replaced with a DDC (Display Data Channel) function in a general DVI (Digital Visual Interface) connection. It is also used as an MHL sideband channel (MSC) that realizes a control function between the source and sink.
- DDC Display Data Channel
- DVI Digital Visual Interface
- the CBUS terminal is a terminal for an information signal that can be called an operation mode switching signal. That is, in the interface standard of the MHL standard, the terminal for the same USB connector is used to change the internal operation of the information terminal device provided with the input / output device (or input / output connector), and the information terminal compatible with the MHL standard. It can be a device.
- FIG. 13 is a diagram illustrating a system configuration example (connection example) compliant with the HDMI standard.
- HDMI is an abbreviation for High-Definition Multimedia Interface, and is a communication interface standard that transmits video and audio as digital signals.
- a source device (master device: host device) 100 and a sink device (slave device: peripheral device) 110 are basically connected.
- HDMI Version 1.4 As the types of connectors conforming to the HDMI standard, there are five types A to E as shown in FIG. 14 at the present time (described as HDMI Version 1.4 or lower, “HDMI-V1.4”). Is stipulated. Then, they are connected as shown in FIG. 13 so that the same signal function names (Signal Name) are matched with each other.
- terminals such as a CEC (Consumer Electronics Control) terminal 101, a Utility terminal 102 (a terminal that has been reserved at the time of HDMI-V1.3), a hot plug detection (HPD) terminal 103, and the like. Is an information terminal for information that can be called a so-called operation mode switching signal. Therefore, since it is the ⁇ type terminal described above, it can be made a candidate as an antenna input shared terminal.
- CEC Consumer Electronics Control
- Utility terminal 102 a terminal that has been reserved at the time of HDMI-V1.3
- HPD hot plug detection
- a ferrite bead 105 for high-frequency cutoff is connected in series to various single signals.
- a common mode choke 106 is connected to various differential signals.
- Various GND and shield signals are collectively grounded 107.
- terminals such as HPD are information terminals of information that can be called so-called operation mode switching signals, and are used as antenna input shared terminals as the ⁇ -type terminals described above. be able to.
- the HPD signal hot plug detection signal
- the sink device slave device: peripheral device
- the source device master device: host device
- the HPD signal is basically a level signal (a stable constant potential signal), it is ideal as the above-described ⁇ -type terminal and is adopted in many interface standards.
- support for conversion cables, conversion adapters, and the like between the interface standards is widespread, there is an advantage that it is easy to use.
- an ⁇ type terminal such as an ID terminal or an HPD terminal may also be used as another information terminal in the included interface standard.
- HDMI-V1.3 when HDMI-V1.3 is upgraded to HDMI-V1.4, type D and type E connectors shown in FIG. 14 are added, and Ethernet (registered trademark: Ethernet) standard transmission is performed. Added support.
- This standard is called HEAC (HDMI with Ethernet and Audio Return Channel: commonly called e-HDMI), and the HPD terminal is used for this purpose.
- the paired terminals are reserved terminals (Reserved terminals) up to that point, and as a result, they are called Utility terminals.
- FIG. 16 is a diagram illustrating a configuration example at the time of HEAC compliant with the HDMI standard.
- the source device (master device: host device) 120 and the sink device (slave device: peripheral device) 130 are connected in the same way as in FIG.
- the Reserved (Utility) terminal 121 and the HPD terminal 122 can be connected to the Ethernet 123 by the differential signal via the Ethernet connection unit 124 and the LAN.
- HDMI-V1.4 includes the function of Ethernet 123, and the HPD terminal is the ⁇ -type terminal described above. For this reason, it is necessary to use / operate in a range where the reception frequency does not overlap with the frequency of the Ethernet 123, or to switch so that the use timing does not overlap. Further, for example, instead of the support of the Ethernet standard (instead of TypeD), a connector such as a cable TypeF having an HPD terminal as an antenna terminal can be prepared and applied.
- the CEC (Consumer Electronics Control) terminal shown in FIG. Similar to the HPD terminal, it is an information terminal for switching the internal operation of the information device, and is a candidate for an antenna input shared terminal.
- This CEC terminal was initially a terminal for simply transmitting and receiving a level signal (device control signal).
- a level signal device control signal
- the device control signal and control protocol are used to connect between HDMI connected devices in a home theater system. It has come to be used for improving operability.
- CEC terminals allow mutual control by adopting a unique method between products of the same manufacturer. Selection by the CEC signal is used for communication in pairs with the SDA terminal (see FIG. 15), while the CEC terminal alone can be used for bidirectional communication.
- the CEC terminal is connected to the antenna by using / operating in a range in which the frequency in pair communication or single bidirectional communication and the reception frequency by antenna reception do not overlap or switching so that the use timing does not overlap. It is used as an input shared terminal.
- a plurality of terminals among the above-mentioned CEC terminal, HPD terminal 122, and Reserved (Utility) terminal 121 are switched using a selector 125, and the timing is changed individually or in combination. It can also be applied as an antenna input shared terminal.
- the function is switched using the selector 126, and the function as each standard information terminal (for example, the HPD terminal 122 here) and the function as the antenna input terminal are switched according to timing or the like. Can be used selectively.
- various functions may be switched using a selector in which the above-described selector 125 and selector 126 are combined.
- the present disclosure can be applied to input / output devices of various interface standards, in particular, input / output devices of interface standards in which the ⁇ type terminal is defined.
- the input / output device of the present disclosure includes the gist of the present disclosure described in the claims in addition to the embodiments (USB input / output device and MHL input / output device) disclosed in this specification. It goes without saying that various applications and modifications are included as long as they do not depart.
- the present disclosure can also have the following configurations.
- An input / output device in which at least one information terminal among information terminals of an input / output connector provided in an information terminal device has both a function as a standard information terminal based on a general-purpose interface standard and a function as an antenna input terminal .
- the input / output device according to (1) which has a function as an information terminal for switching an internal operation of the information terminal device as a function of the standard information terminal.
- the input / output device according to any one of (1) to (3), wherein the standard information terminal has a function as an information terminal having a frequency lower than that of a received signal input from the antenna input terminal.
- the function of the standard information terminal has a function as an information terminal used for determination of a connection partner device, determination of presence / absence of connection with a connection partner device, or information selection at the time of operation switching. ).
- the input / output device according to any one of (1) to (5), wherein the standard information terminal has a function as an ID terminal used for discrimination of a connection partner device.
- the input / output device according to any one of (1) to (6), wherein the function as the antenna input terminal is selectively used by function switching with the function with the standard information terminal .
- the input / output device according to any one of (1) to (7), wherein the function as the antenna input terminal is selectively used by switching functions between the plurality of standard information terminals.
- the input / output device according to any one of (1) to (8), wherein the standard information terminal is an MHL terminal.
- the input / output device according to any one of (1) to (8), wherein the standard information terminal is a terminal conforming to an HDMI standard.
- the antenna signal input to the antenna input terminal is a broadcast wave signal in any one or a plurality of bands of an FM band, a VHF band, a UHF band, or any one of (1) to (10) I / O device.
- the input / output device according to any one of (1) to (14), wherein a ground line of the input / output connector is connected to a shield case of the information terminal device.
- the input / output connector includes a first connection portion for connecting a coaxial cable functioning as an antenna for receiving a broadcast wave signal in any one or a plurality of bands of the FM band, the VHF band, the UHF band, or the like.
- the input / output device according to any one of (1) to (15), provided.
- the frequency band used in the GPS and the cellular phone is a gigahertz band
- the board of the input / output connector is a ground of two boards arranged in parallel to each other in order to pass the signal of the gigahertz band.
- the terminals to which the pins of the input / output connectors provided on the upper board and the lower board arranged in parallel are connected so as not to overlap when viewed from above. I / O device.
- the input / output device according to any one of (1) to (22), wherein the information terminal device is a portable information terminal device.
- D-line connection terminal (3 pins), 74 ... ID connection terminal (4 pins), 75 ... Earth terminal (5 pins), 76 ... Shield Terminal, 77... Through hole, 81 and 82... Ground plane, 83... Dielectric, 100 and 120... Source device (master device: host device), 110 and 130. (Slave device: peripheral device), 101... CEC terminal, 102... HEAC terminal, 103, 122... Hot plug detection (HPD) terminal, 121... Reserved (Utility) terminal, 123. Net (R), 124 ... Ethernet connection (differential amplifier), 125, 126 ... selector (switch)
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Abstract
Description
また、好ましくは、規格情報端子の機能として、情報端末機器の内部の動作を切り替えるための情報端子としての機能を有する。また、規格情報端子の機能として、入力される情報信号の電位により、その情報の内容が判別される情報端子としての機能を有するか、
アンテナ入力端子から入力される受信信号より低い周波数の情報端子として機能することが好ましい。
また、好ましくは、少なくとも1の情報端子は、接続期間内での変化点以外では安定電位を示す情報端子であり、接続相手機器の判別に用いられる情報端子であり、例えばID端子であり、入出力コネクタはUSBコネクタである。
1.USB-SMA変換ケーブルの外部アンテナへの接続検証
2.USB-SMA変換ケーブルの具体例
3.USB機能の維持についての検証
4.同軸ケーブルとUSBケーブルの接続例
5.イヤホンアンテナへの応用例
6.ギガヘルツ帯の通過特性を得るためのUSB入出力装置の基板構造
7.USB端子とMHL端子の機能比較
8.HDMI規格準拠のシステム構成
図1は、本例の入出力装置の一例を示す図である。図1に示すように、情報端末機器(以下、「セット」または「セット基板」ということもある。)側にUSBケーブル接続用のメス型のUSBコネクタが設けられる。このセット側に設けられるUSBコネクタを、以下「セット側USB-Bコネクタ10」という。
USB-Bコネクタ15」という。なお、SMAコネクタは、通常測定用コネクタとして用いられるものである。セット側USB-Bコネクタ10は、図1の太い点線で示す部分であり、ケーブル側USB-Bコネクタ15は図1の細い点線で示す部分である。それぞれが、1ピン~5ピンで接続されるとともに、基板上に固定されている。なお、この関係は後述する図6、図8でも同じである。
一般に、セット側USB-Bコネクタ10(メス型)とケーブル側USB-Bコネクタ15(オス型)とも、1ピン~5ピンで示される5個の接続ピンとシールド端子を有している。これらのセット側USB-Bコネクタ10及びケーブル側USB-Bコネクタ15としては、通常、μUSB-Bコネクタが用いられる。
Bコネクタは一般にセット側に用いられるコネクタであり、これに対して、図5で後述するように、ホストコンピュータ側に接続されるUSBコネクタとしては、通常、ホストコンピュータ側から電源を供給できるAタイプのUSBコネクタが用いられる。
なお、最近ではセット側USBコネクタとして、AタイプあるいはABタイプ(ホスト側とセット側の両方に兼用されるコネクタ)のμUSBコネクタを用いることも考えられているが、ここではセット側のUSBコネクタをBタイプ、ホスト側のUSBコネクタをAタイプとして取り扱うこととする。
図1に示すように、本例のセット側USB-Bコネクタ10では、このID端子として使われる4ピンを、テレビジョン放送等を受信するためのアンテナ端子に用いている。このため、4ピンが接続されるラインに約1000pFのコンデンサ14を直列接続し、このコンデンサ14を介して4ピンに供給されたアンテナ信号をセット内の不図示のチューナー回路(図1のANT)に供給する。
なお、セット側USB-Bコネクタ10の5ピンは、接地用のグランド端子であり、この5ピンが接続されるラインは、後述するケーブル側USB-Bコネクタ15及びセットの外部シールドと接続され、接地されている。
なお、この抵抗器16に関しては、現段階ではイヤホンマイクのみの規定になっているが、今後はイヤホンマイク以外の他の用途にも使われることが予定されている。但し、電源が供給されたかどうかの認識は、後述するように、Vbus端子に電圧を印加し、かつ2ピン(D-端子)と3ピン(D+端子)を短絡(ショート)させて充電を開始することで行われる。
図2は、上述したUSB-SMA変換ケーブルのサンプルを示したものである。図2Aは上側から見た平面図、図2Bはケーブル側USB-Bコネクタ15の断面図、図2CはSMAコネクタ18の断面図、図2Dは正面図である。各図の寸法はUSBコネクタ及びSMAコネクタの標準規格に基づいている。なお、図2において図1と同じものは同一の符号を付している。
また、セット側USB-Bコネクタ10及びケーブル側USB-Bコネクタ15のID端子をアンテナ伝送に用いることで、本来のUSB機能が維持されるか否か、言い換えるとUSBの機能が劣化しないかどうかについて検証した。図4は、USB機能が維持されているかを調べるアイパターン40を示した図である。
このテストは、信号線とテンプレートの関係が人間の目が開いた形に似ていることから、アイパターンテスト(またはアイダイヤグラムテスト)と呼ばれる。
図5、図6は、入出力装置に、図1に示したUSB-SMA変換ケーブルと同様の同軸ケーブルと、通常のUSBケーブルの2つを接続した実施の形態例を示している。図5は概略構成図、図6はその接続関係を詳細に示した図である。なお、図5では、同軸ケーブル17の他端にSMAコネクタ18(図1参照)ではなく、直径3.5mmの2極プラグ23を接続した例を示している。この2極プラグ23を「Φ3.5 2極プラグ」という。2極プラグ23の代わりにSMAコネクタ18、または、通常テレビで使われているFコネ
クタを用いることも可能である。以下、図1、2及び図5、6に示すテレビジョン信号等の放送波を受信するケーブルをUSBケーブルと区別して、単に「同軸ケーブル」と呼ぶことにする。
しかし、情報端末機器を利用する上で、専用の収納型ロッドアンテナを利用してテレビジョン放送波を受信したいという要求もある。このため、SMAコネクタ18の代わりに上述した2極プラグ23または、その他の小型の同軸コネクタを接続して用いることも今後は増えていくと考えられる。
図6に示すように、USB入出力装置である、セット側USB-Bコネクタ10にケーブル側USB-Bコネクタ15が接続されている。上述したように、図1の例では、このケーブル側USB-Bコネクタ15に同軸ケーブル(USB-SMA変換ケーブル)17のみが接続されていた。
但し、ホスト側のFB30及び、コモンモードチョーク31、グランドラインに接続さ
れるFB32は、USB特性と同軸ケーブル17のRF特性が維持されるという前提で、USBケーブル21の特性上、電源ノイズの影響が少ない場合は、なくても問題ない。
図7は、長さ37.5cmの同軸シールド線51と長さ62.5cmのイヤホンコード55、56を接続して作製した、全長約1mのイヤホンアンテナ50を示した図である。
このイヤホンアンテナ50は、一種のモノポールアンテナであり、同軸シールド線51とイヤホンコード55、56の全体の長さでテレビジョン放送のVHF帯の電波を受信できるアンテナを構成し、同軸シールド線51の部分でテレビジョン放送のUHF帯の電波を受信できるアンテナを構成している。
一方、イヤホンコード55、56に接続されるコネクタは、図2に示すSMAコネクタ18ではなく、通常のイヤホンコード55、56と同軸シールド線51とを基板を介して接続するための接続部54であり、この接続部54は樹脂でモールドされている。この接続部54がイヤホンコード55、56と同軸シールド線51との境界部になる。イヤホンコード55、56は、固定部59までは一体に接続されているが、固定部59から先は分離されて、それぞれL側イヤホン57とR側イヤホン58に接続されている。
なお、本例では、同軸シールド線51とイヤホンコード55、56の接続に基板を介して樹脂モールドで形成したが、これに代えてイヤホンジャックとイヤホンプラグでの接続で構成することも可能である。
特に本例のイヤホンアンテナ60においては、後述するように、同軸シールド線61の外皮導体である金属シールド72が、ケーブル側USB-Bコネクタ62のID端子(4ピン)に接続されている点が重要な意味を持つ。図6に示すように、このID端子に接続される金属シールド72は、接地線とは異なるシールド用のラインである。
図10は、本開示の入出力装置において、ギガヘルツ帯の通過特性を得るための基板の構造を示した図である。図10Aは基板全体の斜視図、図10BとCは、誘電体を挟んで配置された平行な2個のアース面(アース層)とUSB入出力端子との位置関係を示した図である。この基板が図1に示す同軸シールド線(同軸ケーブル)17とケーブル側USB-Bコネクタ15が実装されるμUSBプラグ基板である。
3が配置されている。アース面81とアース面82はスルーホール77によって接続され、同電位に保たれている。上側のアース面81は、アース面81aとアース面82bとに分割され、その間にUSBのID端子(4ピン)が接続される電極84が設けられている。
また、電位変化(変位)による判別のための分解能さえ得られれば良いので、少々変位しても動作(ここでは情報判別)には影響しにくい端子となる。また、接続相手機器の切り替えにのみ変化するので、変化点(変化頻度)が少なくて済み、アンテナによる受信周
波数が仮に低くても、その受信信号の周波数領域と周波数的に重畳する可能性が極めて少なくて済む(殆ど出現しない)端子となる。
なぜなら、αタイプ端子は、上述したように、変位点が少ない上に、変化点以外では安定電位を維持し易いので、アンテナによる受信信号との干渉が少なくて(殆ど影響されなくて)済むからである。
図12は、μUSB端子とMHL端子の機能を比較して示した図である。図12に示すMHLは、USBの信号線をデジタル映像信号の伝送に使う規格であり、MHL端子は、
USBコネクタとの併用を前提としている。したがって、MHL端子は、μUSB規格のID端子に直接対応する制御信号(CBUS:CardBus スロット用USB)の端子を、上記αタイプ端子として持っており、このCBUS端子をアンテナ兼用端子として使用することができるようになっている。
図13は、HDMI規格準拠のシステム構成例(接続例)を示す図である。HDMIは、高精細度マルチメディアインターフェース(High-Definition Multimedia Interface)の略で、映像・音声をデジタル信号で伝送する通信インタフェースの標準規格である。このHDMI規格準拠のシステムでは、基本的には、ソース機器(マスタ機器:ホスト機器)100とシンク機器(スレーブ機器:ペリフェラル機器)110とが接続される。
このCEC端子は、当初は単なるレベル信号(機器制御信号)を送受する端子であったが、HDMI-V1.2以降では、機器制御信号と制御プロトコルで、ホームシアターシステムでHDMI接続された機器間の操作性向上に向いたものとして利用されるようになった。
(1)情報端末機器に設けられる入出力コネクタの情報端子のうち、少なくとも1の情報端子が、汎用インタフェース規格に基づく規格情報端子としての機能とアンテナ入力端子としての機能とを兼ね備える、入出力装置。
(2)前記規格情報端子の機能として、前記情報端末機器の内部の動作を切り替えるための情報端子としての機能を有する、(1)に記載の入出力装置。
(3)前記規格情報端子の機能として、入力される情報信号の電位により、その情報の内容が判別される情報端子としての機能を有する、(1)または(2)に記載の入出力装置。
(4)前記規格情報端子の機能として、前記アンテナ入力端子から入力される受信信号より低い周波数の情報端子としての機能を有する、(1)~(3)のいずれかに記載の入出力装置。
(5)前記規格情報端子の機能として、接続相手機器の判別、接続相手機器との接続の有無判別または動作切替時の情報選択に用いられる情報端子としての機能を有する、(1)~(4)のいずれかに記載の入出力装置。
(6)前記規格情報端子の機能として、接続相手機器の判別に用いられるID端子としての機能を有する、(1)~(5)のいずれかに記載の入出力装置。
(7)前記アンテナ入力端子としての機能は、前記規格情報端子との機能との間で、機能
切替により選択的に使用される、(1)~(6)のいずれかに記載の入出力装置。
(8)前記アンテナ入力端子としての機能は、複数の前記規格情報端子との間で、機能切替により選択的に使用される、(1)~(7)のいずれかに記載の入出力装置。
(9)前記規格情報端子は、MHL端子である、(1)~(8)のいずれかに記載の入出力装置。
(10)前記規格情報端子は、HDMI規格準拠の端子である、(1)~(8)のいずれかに記載の入出力装置。
(11)前記アンテナ入力端子に入力されるアンテナ信号は、FM帯、VHF帯、またはUHF帯のいずれかまたは複数の帯域の放送波信号である、(1)~(10)のいずれかに記載の入出力装置。
(12)前記規格情報端子が接続されるラインには、前記帯域の周波数を通過させるコンデンサが接続されている、(11)に記載の入出力装置。
(13)前記規格情報端子が接続されるラインには、前記コンデンサと並列に、前記帯域の周波数に対してハイインピーダンスとなる高域周波数遮断素子が接続されている、(12)に記載の入出力装置。
(14)前記入出力コネクタには、差動信号を伝送するラインが接続される端子が設けられており、該差動信号が入力される端子には、前記帯域の周波数に対してハイインピーダンスとなるコモンモードチョーク素子が接続されている、(11)~(13)のいずれかに記載の入出力装置。
(15)前記入出力コネクタのグランドラインは、前記情報端末機器のシールドケースに接続される、(1)~(14)のいずれかに記載の入出力装置。
(16)前記入出力コネクタには、FM帯、VHF帯、またはUHF帯のいずれかまたは複数の帯域の放送波信号を受信するアンテナとして機能する同軸ケーブルを接続するための第1の接続部が設けられる、(1)~(15)のいずれかに記載の入出力装置。
(17)前記同軸ケーブルの他端には、前記放送波信号を受信するアンテナ、もしくは同軸コネクタが接続される、(16)に記載の入出力装置。
(18)前記入出力コネクタには、更に入出力ケーブルを接続するための第2の接続部が設けられる、(16)または(17)に記載の入出力装置。
(19)前記第1の接続部と前記第2の接続部は、前記入出力コネクタが固定される基板において分離されている、(18)に記載の入出力装置。
(20)前記第1の接続部と前記第2の接続部は、前記入出力コネクタの複数の端子を共有するようにして接続される、(18)または(19)に記載の入出力装置。
(21)更に、少なくとも前記1の情報端子に入力されるアンテナ信号を、GPSや携帯電話で使用する周波数帯まで拡張させた、(1)~(20)のいずれかに記載の入出力装置。
(22)前記GPSや携帯電話で使用する周波数帯は、ギガヘルツ帯であり、前記ギガヘルツ帯の信号を通過させるために、前記入出力コネクタの基板は、互いに平行に配置された2つの基板のグランド端子を接続するとともに、平行に配置される上基板と下基板に設けられた入出力コネクタの各ピンが接続される端子を上面から見て重なる部分をなくすように配置した、(21)に記載の入出力装置。
(23)前記情報端末機器は、携帯情報端末機器である、(1)~(22)のいずれかに記載の入出力装置。
6・・・イヤホンコード、54・・・イヤホンジャック、57、58、68、69・・・イヤホン、63・・・マイクロホン、71・・・電源ライン接続端子(1ピン)、72・・・D+ライン接続端子(2ピン)、73・・・D-ライン接続端子(3ピン)、74・・・ID接続端子(4ピン)、75・・・アース端子(5ピン)、76・・・シールド端子、77・・・スルーホール、81、82・・・アース面、83・・・誘電体、100,120・・・ソース機器(マスタ機器:ホスト機器)、110、130・・・シンク機器(スレーブ機器:ペリフェラル機器)、101・・・CEC端子、102・・・HEAC端子、103、122・・・ホットプラグ検出(HPD)端子、121・・・Reserved(Utility)端子、123・・・イーサネット(登録商標)、124・・・イーサネット接続部(差動増幅器)、125、126・・・セレクタ(切替器)
Claims (23)
- 情報端末機器に設けられる入出力コネクタの情報端子のうち、少なくとも1の情報端子が、汎用インタフェース規格に基づく規格情報端子としての機能とアンテナ入力端子としての機能とを兼ね備える、
入出力装置。 - 前記規格情報端子の機能として、前記情報端末機器の内部の動作を切り替えるための情報端子としての機能を有する、
請求項1に記載の入出力装置。 - 前記規格情報端子の機能として、入力される情報信号の電位により、その情報の内容が判別される情報端子としての機能を有する、
請求項1に記載の入出力装置。 - 前記規格情報端子の機能として、前記アンテナ入力端子から入力される受信信号より低い周波数の情報端子としての機能を有する、
請求項1に記載の入出力装置。 - 前記規格情報端子の機能として、接続相手機器の判別、接続相手機器との接続の有無判別または動作切替時の情報選択に用いられる情報端子としての機能を有する、
請求項1に記載の入出力装置。 - 前記規格情報端子の機能として、接続相手機器の判別に用いられるID端子としての機能を有する、
請求項1に記載の入出力装置。 - 前記アンテナ入力端子としての機能は、前記規格情報端子との機能との間で、機能切替により選択的に使用される、請求項1に記載の入出力装置。
- 前記アンテナ入力端子としての機能は、複数の前記規格情報端子との間で、機能切替により選択的に使用される、請求項1に記載の入出力装置。
- 前記規格情報端子は、MHL端子である、請求項1に記載の入出力装置。
- 前記規格情報端子は、HDMI規格準拠の端子である、請求項1に記載の入出力装置。
- 前記アンテナ入力端子に入力されるアンテナ信号は、FM帯、VHF帯、またはUHF帯のいずれかまたは複数の帯域の放送波信号である、
請求項1に記載の入出力装置。 - 前記規格情報端子が接続されるラインには、前記帯域の周波数を通過させるコンデンサが接続されている、
請求項11に記載の入出力装置。 - 前記規格情報端子が接続されるラインには、前記コンデンサと並列に、前記帯域の周波数に対してハイインピーダンスとなる高域周波数遮断素子が接続されている、
請求項12に記載の入出力装置。 - 前記入出力コネクタには、差動信号を伝送するラインが接続される端子が設けられてお
り、該差動信号が入力される端子には、前記帯域の周波数に対してハイインピーダンスとなるコモンモードチョーク素子が接続されている、
請求項11に記載の入出力装置。 - 前記入出力コネクタのグランドラインは、前記情報端末機器のシールドケースに接続される、
請求項1に記載の入出力装置。 - 前記入出力コネクタには、FM帯、VHF帯、またはUHF帯のいずれかまたは複数の帯域の放送波信号を受信するアンテナとして機能する同軸ケーブルを接続するための第1の接続部が設けられる、
請求項1に記載の入出力装置。 - 前記同軸ケーブルの他端には、前記放送波信号を受信するアンテナ、もしくは同軸コネクタが接続される、
請求項16に記載の入出力装置。 - 前記入出力コネクタには、更に入出力ケーブルを接続するための第2の接続部が設けられる、
請求項16に記載の入出力装置。 - 前記第1の接続部と前記第2の接続部は、前記入出力コネクタが固定される基板において分離されている、
請求項18に記載の入出力装置。 - 前記第1の接続部と前記第2の接続部は、前記入出力コネクタの複数の端子を共有するようにして接続される、
請求項18に記載の入出力装置。 - 更に、少なくとも前記1の情報端子に入力されるアンテナ信号を、GPSや携帯電話で使用する周波数帯まで拡張させた、
請求項1に記載の入出力装置。 - 前記GPSや携帯電話で使用する周波数帯は、ギガヘルツ帯であり、前記ギガヘルツ帯の信号を通過させるために、前記入出力コネクタの基板は、互いに平行に配置された2つの基板のグランド端子を接続するとともに、平行に配置される上基板と下基板に設けられた入出力コネクタの各ピンが接続される端子を上面から見て重なる部分をなくすように配置した、
請求項21に記載の入出力装置。 - 前記情報端末機器は、携帯情報端末機器である、
請求項1に記載の入出力装置。
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Also Published As
Publication number | Publication date |
---|---|
US20150055020A1 (en) | 2015-02-26 |
EP2819311A4 (en) | 2016-03-02 |
CN104115409B (zh) | 2016-10-26 |
JP2013201750A (ja) | 2013-10-03 |
TWI580201B (zh) | 2017-04-21 |
CN104115409A (zh) | 2014-10-22 |
EP2819311B1 (en) | 2019-04-03 |
EP2819311A1 (en) | 2014-12-31 |
KR20140125767A (ko) | 2014-10-29 |
TW201349760A (zh) | 2013-12-01 |
JP5803896B2 (ja) | 2015-11-04 |
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