JP2006039448A - Electronic apparatus, cable, and electronic apparatus system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus which allows a connection terminal to which a cable should be connected, to be easily prescribed when connecting the cable to the electronic apparatus, and to provide the cable and an electronic apparatus system. <P>SOLUTION: An interface part 10 for transmitting signals to the electronic apparatus like an image supply device through cables is provided on a rear surface 1a of a projector 1 and is provided with a plurality of input terminals 10a to 10e as connection terminals for connection of cables. An LED display part 13 consisting of five LEDs 13a to 13e as luminous bodies is provided in the vicinity of the interface part 10 on an upper surface 1b of the projector 1. LEDs 13a to 13e correspond to input terminals 10a to 10e respectively and are arranged in vicinities of corresponding input terminals 10a to 10e. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic device including a plurality of connection terminals to which a cable for connecting to another electronic device can be connected, and further relates to a cable for connecting electronic devices to each other. The present invention also relates to an electronic device system including the plurality of electronic devices and the cable.

  When inputting and outputting signals by connecting a plurality of electronic devices, it is necessary to connect a cable to a connection terminal provided in the electronic device.

  In an image display device such as a monitor or a projector, a plurality of image supply devices such as a VTR (magnetic recording / reproducing device), a DVD (Digital Versatile Disc) reproducing device, and a PC (personal computer) may be connected. Since various video signals and the like are required, a large number of various input terminals are provided (for example, Patent Document 1).

  Usually, characters and figures indicating which cable is to be connected are attached in the vicinity of each connection terminal of the electronic device. Further, when there are a plurality of connection terminals having similar shapes, each connection terminal is colored differently depending on the type of signal, indicating that cables colored in the same color can be connected. For this reason, a user who is accustomed to handling electronic devices can know which cable is to be connected to which connection terminal from information such as the shape of the connector and the characters, figures, and colors described above.

JP 2003-274316 A (FIG. 9)

  However, for users who are unfamiliar with the handling of electronic devices and cannot understand the meaning of the characters and figures, or who have poor visual acuity and color vision and are difficult to identify small characters, symbols, or colors It is difficult to specify a connection terminal to which the cable is to be connected, and it is difficult to make a cable connection between electronic devices by itself.

  The present invention has been made in view of the above problems, and its purpose is to connect an electronic device, a cable, and a cable that can easily identify a connection terminal to which the cable is to be connected when the cable is connected to the electronic device. And providing an electronic device system.

  The electronic device system of the present invention is an electronic device system including a plurality of electronic devices and a cable for connecting the plurality of electronic devices, and the cable can identify the type of the cable. A storage unit that stores identification information; and a first communication unit that can transmit the identification information in a contactless manner; at least one of the plurality of electronic devices includes a plurality of connection terminals to which the cable can be connected; A second communication unit capable of receiving the identification information in a contactless manner and an instruction unit for instructing a connection terminal to which the cable is to be connected according to the identification information.

  According to this electronic device system, when a cable is connected to the electronic device, the electronic device reads the identification information that can identify the type of the cable in the second communication unit, thereby determining the type of the cable to be connected. Since it becomes possible to know, it becomes possible to instruct | indicate the connection terminal which should connect the said cable from a some connection terminal with an instruction | indication part. As a result, it becomes easy to specify the connection terminal to which the cable is to be connected.

  The electronic device of the present invention includes a plurality of connection terminals that can be connected to a cable for connecting to another electronic device, and a second communication unit that can receive the identification information transmitted from the cable in a contactless manner. And an instruction unit for instructing a connection terminal to which the cable is to be connected according to the identification information.

  According to this electronic device, when the cable is connected to the electronic device, the electronic device can know the type of the cable to be connected by reading the identification information transmitted from the cable with the second communication unit. Therefore, it is possible to instruct the connection terminal to which the cable is to be connected from the plurality of connection terminals by the instruction unit. As a result, it becomes easy to specify the connection terminal to which the cable is to be connected.

  In this electronic apparatus, the connection terminal may be connected to a plurality of image supply devices via a cable, and may include an image display unit that displays an image according to an image signal input from the image supply device. .

  An electronic device having an image display unit that displays an image according to an input image signal, such as a projector or a monitor, has a large number of connection terminals so that it can be connected to a plurality of image supply devices. Therefore, it becomes more difficult to specify the connection terminal to which the cable is to be connected. However, according to the electronic apparatus of the present invention, the connection terminal to which the cable is to be connected can be instructed from the plurality of connection terminals by the instruction unit, and thus the connection terminal to be connected to the cable is specified. It becomes easy.

  In this electronic apparatus, a plurality of light emitters corresponding to the respective connection terminals may be provided, and the instruction unit may indicate a connection terminal to be connected depending on a lighting state of the light emitter.

  According to this electronic device, a light emitter corresponding to each connection terminal is provided, and the connection terminal to be connected is specified in order to indicate the connection terminal to be connected according to the lighting state (lighting, extinguishing, blinking, etc.) of the light emitter. Visibility is improved.

  In this electronic apparatus, the instruction unit may give an instruction using a display image by the image display unit.

  According to this electronic device, the connection terminal to which the cable is to be connected is instructed by the display image by the image display unit, so that detailed instruction using a live-action image, characters, etc. is possible, and the connection destination of the cable is instructed. Therefore, it is not necessary to provide a light emitter that is used only for the purpose.

  In this electronic apparatus, it is preferable that the electronic device includes a detection unit that can detect whether or not a cable is connected to the connection terminal.

  According to this electronic device, since the detection unit capable of detecting whether or not a cable is connected to the connection terminal is provided, an instruction according to the connection status up to that time can be given, and the connection of the cable can be performed. By detecting the completion, it is possible to stop the instruction by the instruction unit and the communication by the second communication unit, and thus it is possible to reduce power consumption.

  The cable of the present invention is a cable for connecting a plurality of electronic devices, and stores a storage unit that stores identification information that can identify the type of the cable, and a first unit that can transmit the identification information in a contactless manner. 1, and the identification information can be transmitted to at least one of the electronic devices.

  According to this cable, the storage unit that stores the identification information that can identify the type of the cable and the first communication unit that can transmit the identification information in a non-contact manner are provided. For this reason, when connecting a cable to an electronic device that can receive identification information transmitted from the cable, the electronic device can know the type of the cable, and instructs the connection terminal to be connected. It becomes possible. As a result, it becomes easy to specify the connection terminal to which the cable is to be connected.

  In this cable, the first data communication unit includes a display unit that can transmit and receive data without contact and can change a display state according to data received by the first data communication unit. May be.

  According to this cable, since the first data communication unit can transmit and receive data without contact, it is possible to receive feedback indicating whether or not the cable can be used from the electronic device that has received the identification information. It becomes. Furthermore, since the display unit that can change the display state according to the received data is provided, it is possible to know whether or not the cable can be used before attempting to connect the cable to the electronic device.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 and 2 are perspective views showing a projector as an electronic apparatus according to the present embodiment. FIG. 1 is a view seen from the back side, and FIG. 2 is a view seen from the front side.

  The projector 1 forms an optical image based on an image signal supplied from an image supply device as an electronic device, and displays the image by projecting the optical image on a screen or the like.

  As shown in FIG. 1, the rear surface 1 a of the projector 1 is provided with an electronic device such as an image supply device and an interface unit 10 for transmitting signals via a cable. A plurality of input terminals 10a to 10e are provided as connection terminals for connecting cables. The interface unit 10 of the present embodiment has, as input terminals, a mini D-Sub 15-pin terminal 10a for inputting an image signal from a PC or the like, an S terminal 10b for inputting an image signal from a VTR, a DVD playback device, or the like, and a composite video signal. Pin jack 10c, a mini jack 10d for inputting an audio signal, and a USB (Universal Serial Bus) terminal 10e for inputting an operation signal for operating the projector 1 from a PC or the like. In addition, an inlet terminal 11 for connecting a power cable is provided on the left side of the interface unit 10, and an antenna unit 12 capable of transmitting and receiving data without contact with a non-contact identification tag is provided on the right side of the interface unit. It has been.

  In the vicinity of the interface unit 10 on the upper surface 1b of the projector 1, an LED display unit 13 including five LEDs (Light Emitting Diodes) 13a to 13e as light emitters is provided. The LEDs 13a to 13e are associated with the input terminals 10a to 10e, respectively, and are disposed in the vicinity of the corresponding input terminals 10a to 10e. The LED display unit 13 may be arranged on the same surface as the interface unit 10.

  As shown in FIG. 2, the projector 1 includes a projection lens 14 on the front surface 1c thereof, and can display an image by projecting an optical image onto a screen (not shown) provided in front. An operation unit 15 is provided on the upper surface 1 b of the projector 1. The operation unit 15 is provided with a power switch for switching power on and off, operation switches for operating various states of the projector 1 such as the brightness, contrast, or zoom state of the display image.

  FIG. 3 is a block diagram showing an internal configuration of the projector 1 and an image display system using the projector 1.

  As shown in FIG. 3, the projector 1 is connected to the image supply device 3 via the cable 2 and can display an image on the screen SC based on an image signal output from the image supply device 3. 1, the cable 2, and the image supply device 3 constitute an image display system 5 as an electronic device system.

  The projector 1 includes a control unit 20, a control signal processing unit 21, a storage unit 22, a communication unit 23, an LED control unit 24, a detection unit 25, an image signal processing unit 26, and an OSD (on-screen display). And a processing unit 27. The units 20 to 27 are connected to each other by a bus 28, and the control unit 20 controls the other units 21 to 27 to control the operation of the projector 1.

  The control signal processing unit 21 is connected to the operation unit 15 and is capable of infrared communication with the remote controller RC. Further, the control signal processing unit 21 can be connected to a PC via the USB terminal 10e described above. It has become. When the control signal processing unit 21 receives an operation signal from the operation unit 15, the remote controller RC, or the PC and notifies the control unit 20 to that effect, the control unit 20 determines various states of the projector 1 based on the operation signal. Make changes.

  The storage unit 22 stores a control program executed by the control unit 20, setting values representing various states of the projector 1, and the like. In the present embodiment, further, list information (identification code list) of cables connectable to the projector 1 is stored.

  The communication unit 23 is connected to a coil antenna 23 a provided in the antenna unit 12, and performs data contactlessly with a contactless identification tag existing in a communicable range by an electromagnetic induction method that performs communication using electromagnetic waves. Communication is possible. As an electromagnetic wave to be used, for example, an electromagnetic wave of 135 kHz or less or 13.56 MHz band can be used. In this embodiment, the communicable range is set to a range of about 20 to 30 cm from the antenna unit 12. It is set.

  The communication unit 23 can cause the contactless identification tag to perform an operation corresponding to the command by transmitting data representing the command to the contactless identification tag. The types of commands for the non-contact identification tag include a response request command and a display command. When the communication unit 23 transmits a response request command, all the contactless identification tags that have received the command transmit data representing their identification information to the communication unit 23. The display command is for designating a specific non-contact identification tag and performing a predetermined display on the display unit of the non-contact identification tag.

  The LED control unit 24 controls switching between turning on and off of the LEDs 13 a to 13 e of the LED display unit 13. In the present embodiment, the LED corresponding to the input terminal to which the cable 2 is to be connected is lit to instruct the user of the input terminal to be connected, and the LED control unit 24 and the LED display unit 13 are connected to the cable 2. It functions as an instruction unit for instructing the connection destination.

  The detection unit 25 is connected to each input terminal 10a to 10e provided in the interface unit 10, and detects whether or not the cable 2 is connected to each input terminal 10a to 10e. For example, as shown in FIG. 4, a plurality of contacts 25a and 25b are provided at the input terminal (for example, 10c) for one contact 45 on the cable 2 side, and these contacts 25a and 25b are short-circuited. Whether or not the cable 2 is connected to the input terminal 10c can be detected by detecting whether or not the cable is connected. Moreover, when the connector part 42 of the cable 2 includes a plurality of contacts short-circuited to each other, by detecting whether or not a plurality of contacts corresponding to the contacts on the input terminal side are short-circuited. It becomes possible to detect whether the cable 2 is connected to the input terminals 10a to 10e.

  Returning to FIG. 3, the image signal input to the interface unit 10 from the image supply device 3 via the cable 2 is sent to the image signal processing unit 26.

  The image signal processing unit 26 performs AD conversion on the analog image signal received from the image supply device 3 to generate digital display image data, and further performs image processing such as gamma correction on the display image data. The image signal processing unit 26 has a function of writing display image data to the image memory 26a and reading display image data from the image memory 26a for temporary storage. Display image data that has undergone image processing is supplied to the OSD processing unit 27.

  In response to a request from the control signal processing unit 21, the OSD processing unit 27 performs processing for combining OSD image data representing a menu image or the like for confirming or changing various states of the projector 1 with display image data. Do.

  Graphic data, font data, and the like constituting the menu image are stored in a predetermined format in the OSD memory 27a. When displaying the menu image, the OSD processing unit 27 reads out the menu image data from the OSD memory 27 a to generate OSD image data, and combines the OSD image data with the display image data output from the image signal processing unit 26. To generate composite image data. The composite image data output from the OSD processing unit 27 is supplied to the image projection unit 29. Note that when the menu image or the like is not displayed, the above-described combining process is not performed, and thus the display image data output from the image signal processing unit 26 is supplied to the image projection unit 29 as it is.

  The image projection unit 29 includes a light source, a liquid crystal light valve, and a liquid crystal light valve driving unit (all not shown). When the liquid crystal light valve driving unit drives the liquid crystal light valve according to the input image data, the light emitted from the light source is modulated and an optical image is formed. By projecting this optical image on the screen SC by the projection lens, the image is displayed on the screen SC. Here, the image signal processing unit 26, the image projection unit 29, and the projection lens 14 function as an image display unit that displays an image on the screen SC in accordance with the input image signal.

  In addition, the projector 1 is provided with a power supply unit 16 for inputting an external power supply through the inlet terminal 11. By operating a power switch provided in the operation unit 15, a driving voltage is supplied to each unit, and the projector 1 1 becomes the operating state.

Next, the cable 2 will be described with reference to the drawings.
5A and 5B are diagrams illustrating the cable 2 according to the present embodiment. FIG. 5A is a diagram illustrating the entire cable 2, and FIG. 5B is a diagram illustrating a connector portion 42 for connecting to an electronic device.

  As shown in FIG. 5A, the cable 2 includes a conductor part 41 that transmits a signal and two connector parts that are provided at both ends of the conductor part 41 and connect the conductor part 41 to two electronic devices. 42. Each connector part 42 is provided with a non-contact identification tag 43 capable of non-contact data communication with the communication part 23 of the projector 1 and a display part 44.

  FIG. 6 is a block diagram illustrating a circuit configuration of the non-contact identification tag 43 and the display unit 44. As illustrated in FIG. 6, the non-contact identification tag 43 includes a communication unit 51, a control unit 52, a storage unit 53, a power generation unit 54, and a coil antenna 55.

  The communication unit 51 can transmit the data stored in the storage unit 53 to the communication unit 23 of the projector 1 by the electromagnetic induction method, and can receive the data transmitted from the communication unit 23 of the projector 1 by the electromagnetic induction method. These transmissions and receptions are performed via the coil antenna 55.

  The control unit 52 includes a logic circuit, can control the operation of each unit of the non-contact identification tag 43 and the display unit 44, and controls data transmission / reception and display on the display unit 44.

  The storage unit 53 is composed of a non-volatile memory such as a flash memory or a ferroelectric memory (FeRAM), and stores an identification code that is data representing identification information of the cable 2. In this embodiment, as the identification code, for example, if the cable 2 is a cable connected to the mini D-Sub 15 pin terminal 10a, “MINID-SUB15”, and if it is a cable connected to the S terminal 10b, “S-VIDEO”. ", A character code representing the type of each cable is stored.

  As the display unit 44, for example, an electrophoretic display device using an electrophoretic phenomenon can be used. In this embodiment, it is possible to represent two states of display on and off, and when the display is turned on by the control unit 52, as shown in FIG. Is displayed.

  In addition, since the electrophoretic display device has display image holding performance (memory property), if an image is displayed once by applying a voltage, the image can be held even after the application of the voltage is canceled. It has become. Here, the electrophoresis phenomenon is a phenomenon in which, when an electric field is applied to a dispersion liquid in which charged fine particles (electrophoretic particles) are dispersed in a liquid phase dispersion medium, the fine particles migrate due to Coulomb force. By differently coloring the dispersion medium and the electrophoretic particles, the display content can be changed in accordance with the voltage application direction.

  The power generation unit 54 generates power from a carrier wave (electromagnetic wave) when the communication unit 23 of the projector 1 transmits data, and supplies the generated power to the units 51, 52, 53, and 44.

  When the non-contact identification tag 43 enters the communicable range of the communication unit 23 of the projector 1 by bringing the cable 2 configured as described above close to the antenna unit 12 of the projector 1, the projector 1 performs non-contact identification. By receiving the identification code stored in the storage unit 53 of the tag 43, the type of the cable 2 can be specified.

  FIG. 7 is a flowchart showing the operation of the projector 1 when the cable 2 is brought close to the projector 1. When the power switch is operated with external power supplied to the projector 1 and the projector 1 becomes operable, the following operation is started by the control unit 20.

  As shown in FIG. 7, in step S <b> 101, the control unit 20 transmits a response request command through the communication unit 23. When the non-contact identification tag 43 existing within the communicable range of the communication unit 23 receives the response request command, it responds by transmitting the identification code stored in its own storage unit 53.

  In step S102, it is determined whether a response (identification code) from the non-contact identification tag 43 has been received. If received, the process proceeds to step S103. If not received, it is determined that the non-contact identification tag 43 does not exist within the communicable range, and the process proceeds to step S106.

  In step S103, it is determined from the received identification code whether the cable 2 can be connected to the projector 1. Specifically, it is determined whether or not the received identification code is included in the identification code list stored in the storage unit 22, and if it is included, that is, if the cable 2 can be connected to the projector 1. The process proceeds to step S104, and if not included, that is, if connection is impossible, the process proceeds to step S107.

  In step S104, the detection unit 25 determines whether or not the responding cable 2 has already been connected to the input terminals 10a to 10e. If already connected, the process proceeds to step S108, and if not connected, the process proceeds to step S105.

  In step S105, the LED (any one of the LEDs 13a to 13e) corresponding to the input terminal (any one of the input terminals 10a to 10e) to which the cable 2 is connected is turned on by the LED control unit 24. Thereby, the user can easily specify the input terminal to which the cable 2 is connected. Thereafter, returning to step S101, the above operation is repeated.

  Here, in step S102, when there is no response from the non-contact identification tag 43 and the process proceeds to step S106, if there are already lit LEDs 13a to 13e, the LEDs are turned off.

  In step S104, when it is determined that the responding cable 2 is already connected to the input terminals 10a to 10e and the process proceeds to step S108, and the LED corresponding to the input terminal is lit, The LED is turned off.

  On the other hand, if it is determined in step S103 that the cable 2 cannot be connected to the projector 1 and the process proceeds to step S107, a display command and an identification code of the cable 2 are transmitted and used for the display unit 44 of the cable 2. Display that it is not possible.

  FIG. 8 is a flowchart showing the operation of the cable 2 when the cable 2 is brought close to the projector 1.

  First, when the non-contact identification tag 43 of the cable 2 receives a predetermined electromagnetic wave by the coil antenna 55, the power generation unit 54 generates an operation voltage necessary for the operation of each unit and supplies the operation voltage to each unit. Thereby, the non-contact identification tag 43 and the display part 44 will be in an operable state, and will transfer to step S111.

  In step S111, data included in the electromagnetic wave is received by the communication unit 51, and it is determined whether or not this data is a command transmitted from the communication unit 23 of the projector 1. If it is a command, the process proceeds to step S112, and if it is not a command, step S111 is repeated.

  In step S112, it is determined whether the received command is a response request command. If it is a response request command, the process proceeds to step S113, and if it is another command, the process proceeds to step S114.

  When the process proceeds to step S113, in order to respond to the response request command, the identification code stored in the storage unit 53 is transmitted to the projector 1, and the process returns to step S111.

  When the process proceeds to step S114, it is determined whether or not the received command is a display command for the cable 2. Specifically, when the received command is a display command and it is determined whether or not the identification code transmitted simultaneously with the display command matches the own identification code stored in the storage unit 53. In step S115, the process proceeds to step S115. Otherwise, the process returns to step S111.

  In step S115, the control unit 52 controls the display unit 44 to set the display unit to an on state. As a result, as shown in FIG. 5B, a cross is displayed on the display unit 44 of the cable 2, and the user can recognize that the cable 2 cannot be connected to the projector 1. Then, it returns to step S111 and repeats the said operation | movement.

  As described above, according to the projector 1, the cable 2, and the image display system 5 of the present embodiment, the following effects can be obtained.

  (1) According to the image display system 5 of the present embodiment, the cable 2 includes the storage unit 53 that stores an identification code representing the type of the cable 2, and the communication unit 51 that can transmit the identification code to the projector 1. The projector 1 includes a communication unit 23 that can receive the identification code in a non-contact manner, LEDs 13a to 13e corresponding to the input terminals 10a to 10e, and an LED control unit 24 that controls lighting states of the LEDs 13a to 13e. ing. For this reason, when connecting the cable 2 to the projector 1, the projector 1 can know the type of the cable 2 to be connected by reading the identification code with the communication unit 23, and the plurality of input terminals 10a˜ The input terminal to which the cable 2 is to be connected can be instructed by the LEDs 13a to 13e from 10e. As a result, it becomes easy to specify the input terminal to which the cable 2 is connected.

  (2) According to the projector 1 of the present embodiment, the cable 2 is connected to the communication unit 23 capable of receiving the identification code transmitted from the communication unit 51 of the cable 2 in a non-contact manner and the received identification code. LED13a-13e which can instruct | indicate an input terminal which should be, and the LED control part 24 which controls the lighting state of LED13a-13e. For this reason, when connecting the cable 2 to the projector 1, the projector 1 should read the identification code indicating the type of cable by the communication unit 23 and connect the cable 2 from among the plurality of input terminals 10a to 10e. The input terminals can be designated by the LEDs 13a to 13e. As a result, it becomes easy to specify the input terminal to which the cable 2 is connected.

  (3) According to the projector 1 of the present embodiment, the LEDs 13a to 13e corresponding to the input terminals 10a to 10e are provided, and the input to be connected is indicated by indicating the input terminal to be connected according to the lighting state of the LEDs 13a to 13e. Visibility when identifying terminals is improved.

  (4) According to the projector 1 of this embodiment, the detection unit 25 that can detect whether or not the cable 2 is connected to the input terminals 10a to 10e is provided, and by detecting the connection of the cable 2, Since the LEDs 13a to 13e are turned off, the power consumption required to turn on the LEDs 13a to 13e can be reduced.

  (5) According to the cable 2 of the present embodiment, the projector 1 includes the storage unit 53 that stores the identification code representing the type of the cable 2 and the communication unit 51 that can transmit the identification code in a contactless manner. When the cable 2 is connected to the projector 1, the projector 1 can know the type of the cable 2 and can instruct the input terminal to be connected. As a result, it becomes easy to specify the connection terminal to which the cable is to be connected.

  (6) According to the cable 2 of the present embodiment, when the display command transmitted from the projector 1 is received when the cable 2 is not usable, the display unit 44 can indicate that the cable cannot be used. Therefore, before attempting to connect the cable 2 to the projector 1, it becomes possible to know whether or not the cable 2 can be used.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a flowchart showing the operation of the projector 1 when a cable is brought close to the projector of the second embodiment, and FIG. 10 is an explanatory diagram thereof. The projector 1 according to the present embodiment instructs an input terminal to be connected by a projected image instead of the LED control unit 24 and the LED display unit 13 according to the first embodiment. Further, the storage unit 22 of the projector 1 stores image data representing a real image of the interface unit 10 of the projector 1.

  As shown in FIG. 9, the projector 1 performs the same operation as that of the first embodiment except for step S105. In steps S101 to S104, the cable 2 that responds to the response request command is sent to the projector 1. If it is possible to cope with it and it is not connected, the process proceeds to step S105a.

  In step S <b> 105 a, the control unit 20 reads out image data representing a real image of the interface unit 10 from the storage unit 22 and supplies it to the OSD processing unit 27. Further, the OSD processing unit 27 synthesizes the message “please connect to this connector” and the arrow indicating the input terminal to which the cable 2 is connected to the image data, and the image projection unit 29 synthesizes the message. An image is projected on a screen SC or the like (see FIG. 10). As a result, the user can easily specify the input terminal to which the cable 2 is connected by viewing the projected image. That is, the storage unit 22 that stores the actual image of the interface unit 10, the OSD processing unit 27 that synthesizes a message and an arrow, and the image projection unit 29 that projects the image constitute an instruction unit of the present embodiment. Thereafter, returning to step S101, the above operation is repeated.

  Here, in step S103 of the present embodiment, when the cable 2 is not connectable (non-corresponding), if the OSD processing unit 27 adds a message such as “unusable cable”, the cable Even if the display unit 44 is not provided in the display unit 2, whether or not the cable 2 can be used can be easily recognized.

  As described above, according to the projector 1 of the present embodiment, the following effects can be obtained in addition to the effects of the embodiment.

  According to the projector 1 of the present embodiment, since the input terminal to which the cable 2 is to be connected is indicated by the image displayed on the screen SC or the like by the projector 1, detailed instructions using a photographed image or characters can be made. In addition, there is no need to provide an LED or the like that is used only to indicate the connection destination of the cable 2.

(Third embodiment)
A third embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a perspective view of the projector according to the present embodiment as viewed from the back side.

  As shown in FIG. 11, the interface unit 10 of the present embodiment includes a set of three pin jacks for inputting component video signals in addition to the input terminals provided in the interface unit 10 of the first embodiment. (Input terminals) 10f, 10g, and 10h, and two sets of pin jacks (input terminals) 10i and 10j for inputting audio signals are provided. Further, LEDs 13a to 13j for instructing connection destinations are provided above the input terminals 10a to 10j, respectively.

  Here, the communication unit 23 of the present embodiment limits the communicable range to a very short distance of about 2 cm from the antenna unit 12, and the non-contact identification tag 43 of the cable 2 connected to the input terminals 10a to 10j Can not communicate.

  Further, the projector 1 of the present embodiment does not include the detection unit 25 that can detect whether the cable 2 is connected. Furthermore, when the non-contact identification tag 43 is brought very close to the antenna unit 12 and the LED is turned on once, a predetermined time (for example, 10 seconds) even after the non-contact identification tag 43 is out of the communicable range. The lighting state is maintained until it elapses.

  As in the present embodiment, as a plurality of cables for connecting to a set of input terminals, a cable in which a plurality of cables are integrated may be used. The three cables 2a, 2b, and 2c shown in FIG. 11 are component video signal input cables, and the three cables are bundled and integrated. The connector portions 42 of the cables 2a, 2b, and 2c are each provided with a non-contact identification tag 43, and different identification codes are stored in the storage units 53 of the non-contact identification tags 43. .

  When connecting the cables 2a, 2b, and 2c, the projector 1 is connected to the non-connector of the cable 2a by bringing the connector portion 42 of one of the three (for example, the cable 2a) close to the antenna portion 12. Communication with the contact identification tag 43 becomes possible. At this time, since the communicable range of the communication unit 23 is limited to a very short distance, communication with the non-contact identification tags 43 of the other two cables 2b and 2c is not possible.

  When the projector 1 lights up the LED 13f corresponding to the pin jack (for example, the input terminal 10f) to which the cable 2a is to be connected, the user tries to connect the cable 2a to the pin jack 10f according to this, and the connector portion of the cable 2a. 42 is brought close to the pin jack 10f. At this time, the non-contact identification tag 43 is out of the communicable range, but since the LED 13f is kept in the lighting state for a predetermined time, the cable 2a can be connected according to the instruction by turning on the LED 13f. Subsequently, by performing the same operation for the cables 2b and 2c, it is possible to connect all the cables 2a, 2b and 2c to the correct positions.

  As described above, according to the projector 1 of the present embodiment, the following effects can be obtained in addition to the effects of the embodiment.

  (1) According to the present embodiment, since the communicable range of the communication unit 23 is limited to a very short distance, each of the cables 2a, 2b, 2c is connected to each other when connecting the cables. It is possible to avoid communication with the non-contact identification tag 43 provided in the connector portion 42 of the cable. As a result, the projector 1 can specify which of the plurality of cables 2a, 2b, and 2c is to be connected, and can appropriately designate the input terminal to be connected.

  (2) According to the present embodiment, the communication unit 23 cannot communicate with the non-contact identification tag 43 of the cable 2 in a state where the cable 2 is connected to the input terminal, and further, the non-contact identification tag 43 However, even after leaving the communicable range of the communication unit 23, the lighting state of the LED is maintained for a predetermined time. For this reason, even if it does not have the detection part 25 which can detect the connection state of an input terminal, it becomes possible to instruct the input terminal which should connect the cable 2 until it finishes connecting the cable 2, and LED lights up. Since it does not continue, power consumption can be reduced.

(Modification)
The embodiment of the present invention may be modified as follows.

  In the third embodiment, instead of limiting the communicable range of the communication unit 23 to avoid simultaneous communication with a plurality of cables 2a, 2b, 2c, each of the cables 2a, 2b, 2c In addition, a communication blocking unit that blocks communication with the projector 1 may be provided.

  FIG. 12 is an explanatory diagram of a cable provided with a communication blocking unit in the connector unit 42. As shown in FIGS. 12A and 12B, the connector portion 42 of the cable 2 is provided with a metal tube 61 having a larger opening 61a than the non-contact identification tag 43 as a communication blocking portion so as to be rotatable. It has been. As shown in FIG. 12A, in a state where the non-contact identification tag 43 is covered with the metal tube 61, the coil antenna 55 of the non-contact identification tag 43 is shielded, and communication with the outside is blocked. Also, as shown in FIG. 12B, when the metal tube 61 is rotated to match the positions of the opening 61a and the non-contact identification tag 43, the shield is released and communication with the outside becomes possible.

  According to this, among the three integrated cables 2a, 2b, 2c, only one cable to be connected is made communicable, and further, communication is cut off after connection, It becomes possible to prevent that the cables of the same can communicate at the same time. As a result, it is not necessary to limit the communicable range of the communication unit 23 in order to avoid simultaneous communication with a plurality of cables 2a, 2b, 2c, and the non-contact identification tag 43 is placed in the immediate vicinity of the antenna unit 12. There is no need to get close to.

  As in the first to third embodiments, instead of the communication unit 23 of the projector 1 constantly sending a response request command and monitoring the presence of the contactless identification tag 43 within the communicable range, the user May start monitoring of the non-contact identification tag 43 by operating the operation unit 15 or the like. Furthermore, in this case, when the detection unit 25 detects that the cable 2 is connected, monitoring of the non-contact identification tag 43 may be stopped.

  According to this, since the contactless identification tag 43 is monitored only when the cable 2 needs to be connected, the power consumption can be reduced.

  In the first and second embodiments, when the detection unit 25 detects that the cable 2 is not connected to any of the input terminals 10a to 10c for inputting the image signal, the connection of the cable is prompted. A message may be displayed on the screen SC or the like, and monitoring of the non-contact identification tag 43 may be started. Furthermore, in this case, when the detection unit 25 detects that the cable 2 is connected, monitoring of the non-contact identification tag 43 may be stopped.

  According to this, it is possible to prompt the user to connect the cable 2, and the non-contact identification tag 43 is monitored only when the cable 2 needs to be connected, so that power consumption can be reduced. Is possible.

  In the first to third embodiments, regardless of whether or not the projector 1 is in an operating state, at least the communication unit 23 may be always operated and the non-contact identification tag 43 may be constantly monitored. In this case, when the projector 1 is in a non-operating state and the communication unit 23 receives a response from the non-contact identification tag 43, the communication unit 23 transmits a signal to the power supply unit 16 and receives the signal. 16 may start the operation of the projector 1 by supplying a drive voltage to each unit, and instruct the connection destination of the cable 2. Alternatively, the projector 1 is provided with a power source different from the external power source, and the communication unit 23, the LED control unit 24, and the LED display unit 13 can be operated even when the external power source is not supplied. The connection destination of the cable 2 may be instructed regardless of whether or not it is supplied.

  In the first and second embodiments, the detection unit 25 is not an essential component and can be omitted. When the detection unit 25 is omitted, the corresponding LED may be always lit during the period in which the cable 2 is connected to the input terminals 10a to 10e, or a predetermined time as in the third embodiment. Only lighting may be maintained.

  In the first to third embodiments, the interface unit 10 of the projector 1 is provided with a plurality of sets of input terminals, and among the set of cables connectable to the input terminals. When connecting the first cable, each set of connection terminals to which the cable can be connected is indicated. When connecting the second and subsequent cables, the connection of the first cable is connected. It is desirable to indicate the same connection terminal as the terminal.

  The embodiment of the present invention is not limited to the projector 1 and can be applied to other electronic devices. Further, the connection terminal to which the cable is connected is not limited to the input terminal, but can be applied to other connection terminals such as an output terminal, an input / output terminal, or an inlet terminal for connecting a power cable.

The perspective view which looked at the projector of 1st Embodiment from the back side. The perspective view which looked at the projector of a 1st embodiment from the front side. The block diagram which shows the internal structure of a projector, and the image display system using a projector. Explanatory drawing explaining the structure of a detection part. It is a figure which shows a cable, (a) is a figure which shows the whole cable, (b) is a figure which shows a connector part. The block diagram which shows the circuit structure of a non-contact identification tag and a display part. The flowchart which shows operation | movement of the projector when a cable is brought close to a projector. The flowchart which shows the operation | movement of a cable when a cable is brought close to a projector. 9 is a flowchart showing the operation of the projector when a cable is brought close to the projector of the second embodiment. Explanatory drawing explaining operation | movement of the projector at the time of bringing a cable close to the projector of 2nd Embodiment. The perspective view which looked at the projector of 3rd Embodiment from the back side. It is explanatory drawing of the cable provided with the communication interruption | blocking part in the connector part, (a) is a figure which shows the state which interrupted | blocked communication, (b) is a figure which shows the state which can communicate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Projector as electronic equipment, 2 ... Cable, 3 ... Image supply apparatus as electronic equipment, 5 ... Image display system as electronic equipment system, 10 ... Interface part, 10a-10j ... Input terminal, 12 ... Antenna part, DESCRIPTION OF SYMBOLS 13 ... LED display part which comprises an instruction | indication part, 13a-13j ... LED which comprises an instruction | indication part, 14 ... Projection lens which comprises an image display part, 15 ... Operation part, 16 ... Power supply part, 20 ... Control part, 21 ... Control signal processing unit, 22 ... storage unit, 23 ... communication unit as second communication unit, 23a ... coil antenna, 24 ... LED control unit constituting instruction unit, 25 ... detection unit, 26 ... image display unit Image signal processing unit, 27 ... OSD processing unit, 28 ... Bus, 29 ... Image projection unit constituting image display unit, 41 ... Conducting wire unit, 42 ... Connector unit, 43 ... Non-contact identification tag ... display unit, 51 ... communication unit as a first communication unit, 52 ... control unit, 53 ... storage unit, 54 ... power generation unit, 55 ... coil antenna.

Claims (8)

An electronic device system comprising a plurality of electronic devices and a cable for connecting the plurality of electronic devices,
The cable includes a storage unit that stores identification information that can identify the type of the cable, and a first communication unit that can transmit the identification information in a contactless manner.
At least one of the plurality of electronic devices connects the cable according to the identification information, a plurality of connection terminals to which the cable can be connected, a second communication unit capable of receiving the identification information in a contactless manner, An electronic device system comprising: an instruction unit that instructs a connection terminal to be connected. A plurality of connection terminals to which cables for connecting to other electronic devices can be connected;
A second communication unit capable of receiving the identification information transmitted from the cable in a contactless manner;
An instruction unit for instructing a connection terminal to which the cable is to be connected according to the identification information;
An electronic device characterized by comprising:   The electronic device according to claim 2, wherein the connection terminal is connectable to a plurality of image supply devices via a cable, and an image display unit that displays an image according to an image signal input from the image supply device. Electronic equipment characterized by comprising.   The electronic device according to claim 2, wherein a plurality of light emitters corresponding to the connection terminals are provided, and the instruction unit instructs a connection terminal to be connected depending on a lighting state of the light emitter. And electronic equipment.   The electronic device according to claim 3, wherein the instruction unit gives an instruction by a display image by the image display unit.   6. The electronic apparatus according to claim 2, further comprising a detection unit capable of detecting whether or not a cable is connected to the connection terminal. A cable for connecting a plurality of electronic devices,
A storage unit for storing identification information capable of identifying the type of the cable;
A first communication unit capable of transmitting the identification information in a contactless manner;
With
A cable characterized in that the identification information can be transmitted to at least one of the electronic devices. The cable according to claim 7, wherein the first data communication unit can transmit and receive data without contact, and can change a display state in accordance with data received by the first data communication unit. A cable characterized by having a display section.

Images