TRANSLATOR CERTIFICATION
`
`I, Frank McGee, hereby declare:
`
`That I possess advanced knowledge of the Japanese and English languages. My qualifications are as
`follows:
`(cid:120) Over 25 years of experience as a full-time Japanese-English translator in the field of intellectual
`property.
`(cid:120) MA in East Asian Languages, University of Chicago
`
`The attached translation is, to the best of my knowledge and belief, a true and accurate translation from
`Japanese to English of JP 2006-235993 A. All statements made in this declaration of my own knowledge
`are true and all statements made on information and belief are believed to be true. I make these
`statements with the understanding that willful false statements and the like are punishable by fine or
`imprisonment, or both (17 U.S.C. 1001).
`
`I declare under penalty of perjury that the forgoing is true and correct.
`
`Executed on this 25th day of November, 2019.
`
`At: Wolfeboro, New Hampshire
`
`______________________________________
`Frank McGee
`
`www.morningsideIP.com
`
` The Leader in Global IP Solutions
`
` info@morningsideIP.com
`
`Roku Exhibit 1013
`Roku, Inc. v. Canon Kabushiki Kaisha
`IPR2020-00342
`Page 00001
`
`

`

`JP 2006-235993 A
`
`
`
`
`
`(19) [Issuing Country] Japan Patent Office (JP)
`(12) [Publication Name] Gazette of Unexamined Patent Applications (A)
`(11) [Publication Number] 2006-235993 (P2006-235993A)
`(43) [Publication Date] September 7, 2006 (2006.9.7)
`
`(51) [Int.Cl.] G06F 3/00 (2006.01)
`[FI]
`
`G06F 3/00 A
`G06F 3/00 F
`[Theme Codes (Reference)]
`[Examination Request] Not Yet Received
`[Number of Claims] 5
`[Application Format] Online (OL)
`[Total Number of Pages] 10
`
`
`
`(21) [Application Number] 2005-49544 (P2005-49544)
`(22) [Filing Date] February 24, 2005 (2005.2.24)
`(71) [Applicant]
`[Identification Number] 000005049
`[Name] Sharp Corporation
`[Address] 22-22 Nagaike-cho, Abeno-ku, Osaka
`(74) [Agent]
`[Identification Number] 100078868
`[Attorney]
`[Name] Norio KAWANO
`(74) [Agent]
`[Identification Number] 100114557
`[Attorney]
`[Name] Hidehito KAWANO
`(72) [Inventor]
`[Name] Haruhito WATANABE
`[Address] Sharp Corporation, 22-22 Nagaike-cho, Abeno-ku, Osaka
`
`
`
`
`
`
`
`1
`
`IPR2020-00342 Page 00002
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`

`

`JP 2006-235993 A
`
`(54) [Title of the Invention]
`
`Electrical Device System, Electrical Device, and Connection Control Method
`
`(57) [Abstract]
`
`[Problem]
`
`To provide an electrical device system for establishing a connection circuitwise between a
`first electrical device and a second electric device connected to each other via a connecting
`cable without removing the connecting cable, an electric device, and a connection control
`method.
`
`[Solution]
`
`When receiving an instruction from a user to disconnect a terminal device 1, the
`microcomputer 21 in a host device 2 sends a disconnect instruction to a terminal device 1 to
`disconnect from the host device 2. When the disconnect instruction has been received from
`the host device 2, the microcomputer 11 in the terminal device 1 opens a switch SW and
`disconnects a resistor R1 and the power terminal in a connecting unit 1a. When the user
`presses a connection button 12, the microcomputer 11 in the terminal device 1
`disconnected from the host device 2 closes the switch SW and connects the resistor R1 and
`the power terminal in the connecting unit 1a.
`
`[Selected Drawing] FIG. 1
`
`
`
`
`
`
`2
`
`IPR2020-00342 Page 00003
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`

`

`JP 2006-235993 A
`
`[Claims]
`
`[Claim 1]
`
`An electrical device system having a first connecting unit for a first electrical device
`connected to a second connecting unit for a second electrical device by a connecting cable
`including a data line, the electrical device system characterized in that
`the first electrical device has
`a receiving means for receiving a disconnect instruction to disconnect from the second
`electrical device and
`a means for sending the disconnect instruction from the first connecting unit when the
`receiving means has received a disconnect instruction, and
`the second electrical device has
`a load unit connected to the data line in the connecting cable via the second connecting unit
`on one end and connected to a power supply on the other end,
`a switching unit provided between the other end of the load unit and the power supply for
`connecting and disconnecting the other end and the power supply, and
`a means for controlling the switching of the switching unit so that the other end of the load
`unit and the power supply are disconnected when a disconnect instruction is obtained from
`the second connecting unit.
`
`[Claim 2]
`
`An electrical device equipped with a connecting unit for connecting to a connecting cable
`including a data line, the electrical device comprising
`a load unit connected to the data line in the connecting cable via the connecting unit on one
`end and connected to a power supply on the other end,
`a switching unit provided between the other end of the load unit and the power supply for
`connecting and disconnecting the other end and the power supply,
`a means for obtaining a disconnect instruction to disconnect the connecting cable from the
`connecting unit, and
`a means for controlling the switching of the switching unit so that the other end of the load
`unit and the power supply are disconnected when a disconnect instruction is obtained.
`
`[Claim 3]
`
`An electrical device equipped with a connecting unit for connecting to a connecting cable
`including a data line, the electrical device comprising
`a load unit connected to the data line in the connecting cable via the connecting unit on one
`end and connected to a power supply on the other end,
`a switching unit provided between the other end of the load unit and the power supply for
`connecting and disconnecting the other end and the power supply,
`a receiving means for receiving a connect instruction to connect to the connecting cable,
`and
`a means for controlling the switching of the switching unit so that the other end of the load
`unit and the power supply are connected when the receiving means receives a connect
`instruction.
`
`[Claim 4]
`
` A
`
` connection control method for controlling the connection of a first connecting unit for a
`first electrical device connected to a second connecting unit for a second electrical device via
`a connecting cable including a data line, the second electrical device having a load unit
`
`
`
`3
`
`IPR2020-00342 Page 00004
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`

`

`JP 2006-235993 A
`
`connected to the data line in the connecting cable via the second connecting unit on one
`end and connected to a power supply on the other end, and a switching unit provided
`between the other end of the load unit and the power supply for connecting and
`disconnecting the other end and the power supply, and the connection control method
`comprising the steps of:
`the first electrical device receiving a disconnect instruction to disconnect from the second
`electrical device,
`the first electrical device sending the disconnect instruction from the first connecting unit
`when a disconnect instruction has been received, and
`the second electrical device controls the switching of the switching unit so that the other
`end of the load unit and the power supply are disconnected when the disconnect instruction
`is obtained.
`
`[Claim 5]
`
` A
`
` connection control method for controlling the connection of a first connecting unit for a
`first electrical device connected to a second connecting unit for a second electrical device via
`a connecting cable including a data line, the second electrical device having a load unit
`connected to the data line in the connecting cable via the second connecting unit on one
`end and connected to a power supply on the other end, and a switching unit provided
`between the other end of the load unit and the power supply for connecting and
`disconnecting the other end and the power supply, and the connection control method
`comprising the steps of:
`the second electrical device receiving a connect instruction to connect to the first electrical
`device, and
`the second electrical device controlling the switching of the switching unit so that the other
`end of the load unit and the power supply are disconnected when the disconnect instruction
`is obtained.
`
`[Detailed Description of the Invention]
`
`[Technical Field]
`
`[0001]
`
`The present invention relates to an electrical device system for connecting via a connecting
`cable a first electrical device and a second electrical device capable of being connected to a
`connecting cable, an electrical device used in this electrical device system, and a connection
`control method for controlling the connection between a first electrical device and a second
`electrical device via a connection cable in an electrical device system.
`
`[Background Art]
`
`[0002]
`
` A
`
` universal serial bus (USB) cable is used as a cable for connecting a personal computer to
`a peripheral device such as a keyboard, mouse, modem or digital camera. This cable can be
`plugged into a personal computer and a peripheral device without turning off the power.
`When a peripheral device (terminal device) connected to a personal computer (host device)
`via a USB cable cannot procure power for itself, it draws power from the host device via a
`power supply line in the USB cable.
`
`[0003]
`
`
`
`4
`
`IPR2020-00342 Page 00005
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`

`

`JP 2006-235993 A
`
`
`The host device detects whether or not a terminal device has been connected via a USB
`cable based on the voltage level in a data line in the USB cable. More specifically, when a
`terminal device has been connected via a USB cable, the host device detects a change in
`the voltage level of the data line in the USB cable, and determines that a terminal device
`has been connected based on the detected change in the voltage level. As a result, the host
`device can determine that a terminal device has been connected and initiate an exchange of
`data with the terminal device as soon as the user has connected a terminal device to a host
`device via a USB cable.
`
`[0004]
`
`When a terminal device is connected via a USB cable, the host device generally consumes
`more power than when a terminal device is not connected. Therefore, in order to reduce
`power consumption by the host device, a user must disconnect the host device from a
`terminal device when the terminal device is not needed. In other words, the user has to
`unplug the USB cable from the terminal device or the host device. As a result, a terminal
`device has been proposed that reduces power consumption by disconnecting from a USB
`cable based on a command from the host terminal (see, for example, Patent Document 1).
`
`[Patent Document 1]
`
`JP 2003-140784 A
`
`[Disclosure of the Invention]
`
`[Problem to be Solved by the Invention]
`
`[0005]
`
`However, when the device disclosed in Patent Document 1 has been disconnected from a
`USB cable and is to be reconnected to the USB cable, the user must disconnect the USB
`cable from the host device or terminal device and then reconnect the cable. When the
`connection port for a USB cable is on the back of the host device, it can be difficult to
`disconnect the USB cable from the host device.
`
`[0006]
`
`It is an object of the present invention to solve this problem by providing: an electrical
`device system that enables a host device and a terminal device connected via a connecting
`cable to be disconnected by a switching unit inside the terminal device without physically
`unplugging the connecting cable from the host device or the terminal device; electrical
`devices used in this electrical device system; and a connection control method for
`controlling the connection between a host device and a terminal device via a connecting
`cable in this electrical device system.
`
`[0007]
`
`It is another object of the present invention to solve this problem by providing: an electrical
`device system that enables a host device and a terminal device connected via a connecting
`cable to be connected by a switching unit inside the terminal device without physically
`plugging the connecting cable into the host device or the terminal device; electrical devices
`used in this electrical device system; and a connection control method for controlling the
`
`
`
`5
`
`IPR2020-00342 Page 00006
`
`

`

`JP 2006-235993 A
`
`connection between a host device and a terminal device via a connecting cable in this
`electrical device system.
`
`[Means for Solving the Problem]
`
`[0008]
`
`The present invention is an electrical device system having a first connecting unit for a first
`electrical device connected to a second connecting unit for a second electrical device by a
`connecting cable including a data line, the electrical device system characterized in that
`the first electrical device has a receiving means for receiving a disconnect instruction to
`disconnect from the second electrical device and a means for sending the disconnect
`instruction from the first connecting unit when the receiving means has received a
`disconnect instruction, and the second electrical device has a load unit connected to the
`data line in the connecting cable via the second connecting unit on one end and connected
`to a power supply on the other end, a switching unit provided between the other end of the
`load unit and the power supply for connecting and disconnecting the other end and the
`power supply, and a means for controlling the switching of the switching unit so that the
`other end of the load unit and the power supply are disconnected when a disconnect
`instruction is obtained from the second connecting unit.
`
`[0009]
`
`The present invention is also an electrical device equipped with a connecting unit for
`connecting to a connecting cable including a data line, the electrical device comprising
`a load unit connected to the data line in the connecting cable via the connecting unit on one
`end and connected to a power supply on the other end, a switching unit provided between
`the other end of the load unit and the power supply for connecting and disconnecting the
`other end and the power supply, a means for obtaining a disconnect instruction to
`disconnect the connecting cable from the connecting unit, and a means for controlling the
`switching of the switching unit so that the other end of the load unit and the power supply
`are disconnected when a disconnect instruction is obtained.
`
`[0010]
`
`The present invention is also an electrical device equipped with a connecting unit for
`connecting to a connecting cable including a data line, the electrical device comprising
`a load unit connected to the data line in the connecting cable via the connecting unit on one
`end and connected to a power supply on the other end, a switching unit provided between
`the other end of the load unit and the power supply for connecting and disconnecting the
`other end and the power supply, a receiving means for receiving a connect instruction to
`connect to the connecting cable, and a means for controlling the switching of the switching
`unit so that the other end of the load unit and the power supply are connected when the
`receiving means receives a connect instruction.
`
`[0011]
`
`The present invention is also a connection control method for controlling the connection of a
`first connecting unit for a first electrical device connected to a second connecting unit for a
`second electrical device via a connecting cable including a data line, the second electrical
`device having a load unit connected to the data line in the connecting cable via the second
`connecting unit on one end and connected to a power supply on the other end, and a
`switching unit provided between the other end of the load unit and the power supply for
`
`
`
`6
`
`IPR2020-00342 Page 00007
`
`

`

`JP 2006-235993 A
`
`connecting and disconnecting the other end and the power supply, and the connection
`control method comprising the steps of: the first electrical device receiving a disconnect
`instruction to disconnect from the second electrical device, the first electrical device sending
`the disconnect instruction from the first connecting unit when a disconnect instruction has
`been received, and the second electrical device controls the switching of the switching unit
`so that the other end of the load unit and the power supply are disconnected when the
`disconnect instruction is obtained.
`
`[0012]
`
`The present invention is also a connection control method for controlling the connection of a
`first connecting unit for a first electrical device connected to a second connecting unit for a
`second electrical device via a connecting cable including a data line, the second electrical
`device having a load unit connected to the data line in the connecting cable via the second
`connecting unit on one end and connected to a power supply on the other end, and a
`switching unit provided between the other end of the load unit and the power supply for
`connecting and disconnecting the other end and the power supply, and the connection
`control method comprising the steps of: the second electrical device receiving a connect
`instruction to connect to the first electrical device, and the second electrical device
`controlling the switching of the switching unit so that the other end of the load unit and the
`power supply are disconnected when the disconnect instruction is obtained.
`
`[0013]
`
`In an electrical device system connecting a first electrical device to a second electrical
`device via a connecting cable in the present invention, the second electrical device has
`a load unit connected to the data line in the connecting cable via the second connecting unit
`on one end and connected to a power supply on the other end, and a switching unit
`provided between the other end of the load unit and the power supply for connecting and
`disconnecting the other end and the power supply. When a disconnect instruction to
`disconnect the second electrical device via a connecting cable is received, the first electrical
`device sends a disconnect instruction to the second electrical device. When the
`disconnection instruction is obtained, the second electrical device controls the switching of
`the switching unit to disconnect the other end of the load unit from the power supply. In
`this way, the connecting cable and the second electrical device can be disconnected
`circuitwise by the switching unit without physically unplugging the connecting cable from
`the first electrical device or the second electrical device.
`
`[0014]
`
`In an electrical device system connecting a first electrical device to a second electrical
`device via a connecting cable in the present invention, the second electrical device has
`a load unit connected to the data line in the connecting cable on one end and connected to a
`power supply on the other end, and a switching unit provided between the other end of the
`load unit and the power supply for connecting and disconnecting the other end and the
`power supply. When a connect instruction to connect the second electrical device via the
`connecting cable is received, the second electrical device controls the switching of the
`switching unit to connect the other end of the load unit to the power supply. In this way,
`the connecting cable and the second electrical device can be connected circuitwise by the
`switching unit without physically plugging the connecting cable into the first electrical device
`or the second electrical device.
`
`[Effects of the Invention]
`
`
`
`7
`
`IPR2020-00342 Page 00008
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`

`

`JP 2006-235993 A
`
`
`[0015]
`
`In the present invention, when a first electrical device connectable to a second electrical
`device via a connecting cable has sent a disconnect instruction to the second electrical
`device to disconnect from the connecting cable, the second electrical device uses a
`switching unit provided between the power supply and a load unit connected on one end to
`the data line in the connecting cable and on the other end to the power supply to disconnect
`the power supply from the other end of the load unit. By disconnecting the connecting cable
`and the second electrical device using this switching unit, the connection between the first
`electrical device and the second electrical device can be disconnected circuitwise without
`having to physically unplug the connecting cable from the first electrical device or the
`second electrical device.
`
`[0016]
`
`In the present invention, when the second electrical device connectable to the first electrical
`device via the connecting cable has received a connect instruction to connect to the
`connecting cable, it uses the switching unit provided between the power supply and the load
`unit connected on one end to the data line in the connecting cable and on the other end to
`the power supply to connect the power supply to the other end of the load unit. By
`disconnecting the connecting cable and the second electrical device using this switching
`unit, the connection between the first electrical device and the second electrical device can
`be established circuitwise without having to physically plug the connecting cable back into
`the first electrical device or the second electrical device.
`
`[Best Mode for Carrying Out the Invention]
`
`[0017]
`
`The following is a detailed description of the electrical device system of the present
`invention with reference to the embodiments shown in the drawings. FIG. 1 is a block
`diagram showing the overall configuration in an electrical device system of the present
`invention. In the electrical device system 100 of the present embodiment, a host device 2
`serving as the first electrical device and a terminal device 1 serving as the second electrical
`device are connected via a USB cable 100a serving as the connecting cable. The host device
`2 can be a personal computer, the terminal device 1 can be a peripheral device such as a
`keyboard, mouse, modem or digital camera, and the connecting cable does not have to be a
`USB cable 100a. In the following explanation, the terminal device 1 cannot procure power
`itself. However, the present invention is not limited to this configuration.
`
`[0018]
`
`The USB cable 100a has a power supply line Vbus and ground line GND for supplying power
`from the host device 2 to the terminal device 1, and data line D + and data line D- for
`sharing data between the host device 2 and the terminal device 1. The host device 2
`connectable to the USB cable 100a has a power supply terminal for connecting the power
`supply line Vbus, the ground line GND and the data lines D+, D-, and a connecting unit
`(first connecting unit) 2a with a ground terminal, D+ terminal, and D- terminal. Similarly,
`the terminal device 1 has a power supply terminal for connecting the power supply line
`Vbus, the ground line GND and the data lines D+, D-, and a connecting unit (second
`connecting unit) 1a with a ground terminal GND, D+ terminal, and D- terminal.
`
`
`
`
`8
`
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`

`

`JP 2006-235993 A
`
`[0019]
`
`The host device 2 includes a microcomputer (micom) 21 that performs operations, a USB
`controller 20, a control unit 22, and a display unit 23 as main components. Explanation of
`other hardware components in the personal computer serving as the host device 2 has been
`omitted.
`
`[0020]
`
`The microcomputer 21 operates as a control center for the host device 2, and controls and
`operates hardware components such as the USB controller 20, the control unit 22, and the
`display unit 23 which are connected to each other. The USB controller 20 is an interface for
`exchanging data with the terminal device 1 via the USB cable 100a, and is connected to the
`D+ terminal and the D- terminal in the connecting unit 2a. As a result, the USB controller
`20 can exchange data (commands) with the terminal device 1 via the data lines D+ and D-
`under the control of the microcomputer 21.
`
`[0021]
`
`The control unit 22 includes keys for the user to operate the host device 2. When a key is
`operated by the user, a control signal corresponding to the key is sent to the microcomputer
`21. In this way, the microcomputer 21 can execute processing based on control signals
`received from the control unit 22. The display unit 23 is a display device consisting of, for
`example, a liquid crystal display panel, and displays operations performed by the host
`device 2 and information useful to the user.
`
`[0022]
`
`In the host device 2, the power supply terminal for the connecting unit 2a is connected to
`the power supply Vcc, and the ground terminal for the connecting unit 2a is connected to
`the ground (0V) GND. The host device 2 also has a resistor (pullup resistor) R1 connected
`at one end to the D- terminal of the connecting unit 2a and at the other end to the power
`supply Vcc, and a resistor (pulldown resistor) R2 connected at one end to the D+ terminal
`of the connecting unit 2a and at the other end to the ground GND.
`
`[0023]
`
`The terminal device 1 includes a microcomputer 11 that performs operations, a USB
`controller 10, and a connection button 12 as main components. Explanation of other
`hardware components for the peripheral device serving as the terminal device 1, such as a
`keyboard, mouse, modem or digital camera, has been omitted.
`
`[0024]
`
`The microcomputer 11 operates as a control center for the terminal device 1, and controls
`and operates the USB controller 10 and other components which are connected to each
`other. The USB controller 10 is an interface for exchanging data with the host device 2 via
`the USB cable 100a, and is connected to the D+ terminal and the D- terminal of the
`connecting unit 1a. In this way, the USB controller 10 can exchange data with the host
`device 2 via the data lines D+ and D- under the control of the microcomputer 11.
`
`[0025]
`
`
`
`
`9
`
`IPR2020-00342 Page 00010
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`

`

`JP 2006-235993 A
`
`In the terminal device 1, the ground terminal of the connecting unit 1a is connected to the
`ground GND. The terminal device 1 also has a resistor (pullup resistor) R1 (load unit)
`connected at one end to the D+ terminal of the connecting unit 1a and at the other end to
`the power supply terminal of the connecting unit 1a, and a resistor (pulldown resistor) R2
`connected at one end to the D- terminal of the connecting unit 1a and at the other end to
`the ground GND. The terminal device 1 is also provided with a switch (switching unit) SW
`that opens and closes the path between the power supply terminal and the resistor R1 in
`the connecting unit 1a, and connects and disconnects the power supply terminal and the
`resistor R1 in the connecting portion 1a circuitwise according to controls from the
`microcomputer 11.
`
`[0026]
`
`The resistor R1 provided in the terminal device 1 does not have to be a simple resistor, and
`can be, for example, an element or circuit equivalent to a resistor such as a capacitor or a
`coil, an element or circuit having internal resistance, or an element or circuit configured to
`operate as a resistor.
`
`[0027]
`
`When the terminal device 1 is connected to the host device 2 via a USB cable 100a in an
`electrical device system 100 with this configuration, power is supplied from the host device
`2 to the terminal device via the power supply line Vbus in the USB cable 100a to pull up the
`resistor R1 in the terminal device 1 to a predetermined voltage. When the resistor R1 in the
`terminal device 1 has been pulled up, the voltage at the D+ terminal of the connecting unit
`1a is transmitted to the D+ terminal of the host device 2 via the data line D+ in the USB
`cable 100a. In this way, the USB controller 20 can detect that the terminal device 1 has
`been connected via the USB cable 100a.
`
`[0028]
`
`In an electrical device system 100 of the present embodiment, the host device 2 and the
`terminal device 1 connected via the USB cable 100a as described above can be
`disconnected and reconnected if necessary without unplugging the USB cable 100a. More
`specifically, when the user of the host device 2 does not need the terminal device 1
`connected via the USB cable 100a, an instruction is sent to disconnect the terminal device 1
`via the USB cable 100a by using the control unit 22 displayed on the display unit 23 in a
`particular screen.
`
`[0029]
`
`The microcomputer 21 in the host device 2 functions as the receiving means for receiving a
`disconnect instruction from the user to disconnect the terminal device 1. When a disconnect
`instruction has been received, a disconnect instruction is sent from the D+ terminal and D-
`terminal of the connecting unit 2a to the terminal device 1 to disconnect from the USB cable
`100a. When the USB controller 10 in the terminal device 1 has received a disconnect
`instruction via the D+ terminal and the D- terminal of the connecting unit 1a, it notifies the
`microcomputer 11, and the microcomputer 11 performs controls to open the switch SW and
`disconnect the resistor R1 and power supply terminal of the connecting unit 1a.
`
`[0030]
`
`
`
`
`10
`
`IPR2020-00342 Page 00011
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`

`JP 2006-235993 A
`
`When the switch SW has been opened and the terminal device 1 disconnected by the USB
`cable 100a in this manner but the user would like to reconnect the terminal device 1 to the
`host device 2 via the USB cable 100a, a connection button 12 is pressed on the terminal
`device 1. The connection button 12 may be a push button turned on by pressing it down, or
`may be a slider that is turned on and off using a sliding operation. The connection button 12
`does not have to be a dedicated button. The terminal device 1 can also be configured so
`that the user issues an instruction to connect the USB cable 100a by operating a control unit
`(not shown).
`
`[0031]
`
`When the user has pressed down on the connection button 12, the microcomputer 11 in the
`terminal device 1 functions as a receiving unit for receiving a connection instruction to
`connect to the USB cable 100a. When a connection instruction has been received, controls
`are performed to close the switch SW and connect the resistor R1 and the power supply
`terminal in the connecting unit 1a. The resistor R1 in the terminal device 1 is pulled up to a
`predetermined voltage, and the voltage at the D+ terminal on the connecting unit 1a due to
`the pulled up resistor R1 is transmitted to the D+ terminal on the host device 2 via data line
`D+ in the USB cable 100a. In this way, the USB controller 20 can detect that the terminal
`device 1 has been connected via the USB cable 100a, and data can be exchanged with the
`terminal device.
`
`[0032]
`
`The following is an explanation of the operations performed in an electrical device system
`100 with this configuration to disconnect the host device 2 and the terminal device 1
`connected via the USB cable 100a. FIG. 2 is a flowchart showing the process for
`disconnecting the host device 2 and the terminal device 1 in the electrical device system
`100 of the present invention. This processing is executed by the microcomputers 21, 11
`using a control program stored in the ROM built into the microcomputers 21, 11.
`
`[0033]
`
`In an electrical device system 100 in which a host device 2 and a terminal device 1 have
`been connected via a USB cable 100a, the user operates the control unit 22, and the
`microcomputer 21 in the host device 2 determines whether or not an instruction has been
`received to disconnect the terminal device 1 via the USB cable 100a (S1). When a
`disconnection instruction has not been received (S1: NO), normal operations are performed.
`
`[0034]
`
`When the microcomputer 21 has determined that an instruction has been received to
`disconnect the terminal device 1 (S1: YES), a disconnect instruction to disconnect the USB
`cable 100a is sent to the terminal device 1 from the D+ terminal and the D- terminal of the
`connecting unit 21 (S2). The microcomputer 11 in the terminal device 1 receives a
`disconnect instruction at the D+ terminal and the D- terminal of the connecting unit 1a via
`the USB controller 10 (S3), and performs controls to open the switch SW (S4) and
`disconnect the resistor R1 and the power supply terminal of the connecting unit 1a. In this
`way, the host device 2 and the terminal device 1 can be disconnected via the USB cable
`100a without having to unplug the USB cable 100a from the host device 2 or the terminal
`device 1.
`
`[0035]
`
`
`
`11
`
`IPR2020-00342 Page 00012
`
`

`

`JP 2006-235993 A
`
`
`The following is an explanation of the operations performed in an electrical device system
`100 with this configuration to reconnect the host device 2 and the terminal device 1
`connected via the USB cable 100a after the USB c