JP2006323401A - Display unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display unit that can favorably communicate with various types of computers. <P>SOLUTION: The display unit has a serial interface adapter (2) between a PC (personal computer) (3) and a CPU (10) provided within the display unit and is capable of performing mutual conversion between communication information compliant with interface specifications of the PC (3) and the display. The display unit is capable of communicating with various computers through the serial interface adapter (2). Further, the serial interface adapter (2) is removably provided and placed in a front panel of the display. The serial interface adapter is configured as to be easily replaced by another according to the interface specifications of the PC. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image display device used for a computer terminal or the like, and relates to a display device having a communication function with a computer such as a personal computer (hereinafter abbreviated as PC) or a workstation.

  As a conventional example of a display device relating to communication with a PC, there is an image display device which is clearly shown in FIG. 7 of Japanese Patent Laid-Open No. 5-232918. In the case of this image display device, a computer interface specification control signal output from the computer main body is input to a display control circuit of the image display device. In this case, the control signal input to the display control circuit is input with the same interface specifications as the computer interface. Here, the interface specification refers to a specification of a command, data, or the like output from a communication device or a specification of a command, data, or the like that can be processed by the communication device.

  Japanese Unexamined Patent Publication No. 7-302068 discloses a display device in a display system related to communication between a computer and a display device. The display device is equipped with a permanent storage device. The permanent storage device stores a control code related to “height, width and brightness of visual output” in the display device. The permanent storage device also stores an identification code for allowing the computer to identify the specifications of the display device. The information is read as needed by the display system, and the computer recognizes it by communicating with the computer. The display device can be controlled based on the information. With this function, it is intended to omit troublesome image quality adjustment performed by the user when using the display device such as horizontal, vertical display position, and display size.

  As another conventional technique, Japanese Patent Application Laid-Open No. 10-116139 discloses a display device incorporating a Hub function of a USB (Universal Serial Bus) which is a new interface of a PC. The hub of the display device is composed of one UP port connected to an external computer, three Down ports to which peripheral devices are connected, and a Hub control circuit. When the hub UP port is connected to an external computer such as a PC, the manufacturer name, product name, serial number, number of down ports, etc. held in the hub controller for controlling the hub function in the hub control circuit By returning the identification information to the external computer through the UP port, the external computer can recognize the hub. Then, an operation command is transmitted from the external computer to the hub, and the hub down port can be used. When a peripheral device is connected to the Hub Down port in this state, communication between the peripheral device and an external computer becomes possible, and the peripheral device becomes operable.

Japanese Patent Laid-Open No. 5-232918 Japanese Patent Laid-Open No. 7-302068 JP-A-10-116139

  However, in the prior art disclosed in Japanese Patent Application Laid-Open No. 7-302068, there is a restriction that the PC and the control circuit in the display device directly communicate with each other, so that only a specific serial interface standard possessed by the PC can be supported. It was. Therefore, in order to communicate with a PC having another serial interface standard, it is necessary to redevelop a control circuit that conforms to the new serial interface standard as the control circuit of the display device, and the development period and cost are reduced. There was a problem of this.

  Further, in the above-mentioned conventional example, the display device's permanent storage device stores information relating to the video signal or video signal timing adapted to the display device, but this information alone is particularly useful when using the display device. Insufficient information, such as when trouble occurs in the display device, has been a problem.

  Furthermore, with regard to communication with different serial interface specifications of a general digital signal processing apparatus having a communication function, there is no conversion means between the different interface specifications at present, so connection of digital signal processing apparatuses with different interface specifications is possible. I could not.

  In the prior art disclosed in Japanese Patent Application Laid-Open No. 10-116139, the hub is recognized based on the manufacturer name, product name, and manufacturing number of the hub recorded in the hub controller section, so that versatility cannot be obtained. There is a problem. For example, when a display device is shipped under the brand name of another company, it is necessary to rewrite the manufacturer name recorded in the hub controller unit so that it matches the manufacturer name of the display device. There was a problem that a certain hub could not be obtained and the manufacturing cost of the hub was high.

  In addition, since the display device specification information should originally be held on the display device side, if this is held on the hub side, the display device specification information held by the hub and the actual display device specification information Are different and may cause inconsistencies.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a highly versatile display device that can cope with interface specifications for communication with various computers. Another object of the present invention is to provide a display device with excellent maintainability that can obtain various information inside the display device.

  In order to achieve the above object, a display device according to the present invention is a display device having a CPU and means for communicating with a computer, including an interface specification for communication from the computer and an interface specification that can be processed by the CPU. The feature is that an interface specification conversion means for mutual conversion is provided. The interface specification conversion means can be configured to be detachable from the display device. When the computer connected to the display device is replaced, the interface specification of the computer changes, and the interface specification conversion means conforms to the interface specification conversion. It can be replaced with another interface specification conversion means.

  With such a configuration, the same display device can be used without changing or remodeling the display device to various computer communication interface specifications. Moreover, in terms of the function of mutual conversion of the interface specifications between the computer and the display device, the interface specification conversion means is not limited to being provided in the display device, and the same interface mutual conversion function can be provided by being provided on the computer side. Can work.

  Therefore, by using this interface specification conversion means, the display device according to the present invention can communicate with computers having various specifications, and can also communicate with display devices having various interface specifications when viewed from the computer side. Become.

  Specifically, a serial interface adapter is provided in the display device as the interface specification conversion means, and the communication information of the interface specification from the computer is converted to communication information of the interface specification suitable for the CPU of the display device by the serial interface adapter, Conversely, the communication information of the CPU interface specification of the display device can be converted into the communication information of the computer interface specification. This interface conversion means eliminates the need to replace the display device or to newly develop a CPU included in the display device to match the communication interface from the computer. Further, when the detachable interface specification conversion means is mounted on the display device, the operability of the user at the time of replacement can be improved by setting the mounting position around the display screen of the display device. For example, if the interface specification conversion means is mounted in the vicinity of the power switch, the ease of replacement for the user can be improved in the same way as turning on and off the power. Further, the effect of providing the mounting position around the display screen of the display device is not only when the interface specification conversion unit is mounted, but also an interface unit for enabling communication without the conversion unit. Even when an interface adapter is provided, the same effect can be obtained. However, communication in the present invention means that at least information such as a command can be transmitted and received between two devices in two directions, and the information may include information including data information in addition to the command. Shall.

  The mutual conversion function between the above different interface specifications is assumed to be in communication between the computer and the display device, but not only the communication between the computer and the display device but also the mutual interface conversion between general digital signal processing devices. This can be done in the same way by various interface specification conversion means. Therefore, in the present invention, interface specification conversion means for enabling mutual interface specification conversion in communication between digital signal processing apparatuses having different interface specifications, a digital signal processing apparatus provided with the interface specification conversion means, and the interface specification conversion means And a communication system comprising two digital signal processing devices and interface specification conversion means for performing mutual conversion of interface specifications in the communication.

  Also, a hub is provided in the interface specification conversion means attached to the display device, so that a plurality of computers and a plurality of peripheral devices can be connected to the hub. Here, the hub has an upstream port to which a computer or the like is connected and a downstream port to which a peripheral device is connected, and allows the computer and the peripheral device to freely communicate with each other via these ports. is there. By connecting computers and peripheral devices via a hub, communication between one computer and the selected peripheral device is possible. Even during the communication, communication between the computer and another selected peripheral device can be performed.

  In addition, the display device according to the present invention includes a memory area that stores the internal state of the display device during normal operation, in addition to a conventional memory area that stores information related to video signals and video signal timing that can be supported by the display device. Can have. Furthermore, a means for detecting the internal state of the display device can be provided. By comparing the normal state information of the display device stored in the memory area with the detection result by the means for detecting the current internal state of the display device, detailed operation information regarding the display device can be obtained.

  In the present invention, since the interface specification conversion means for converting the interface specification of the computer connected for communication into the interface specification supported by the CPU of the display device is provided, a CRT (Cathode Ray Tube) is provided. This can be applied not only to the case of the above but also to the case of a matrix type display device.

  Furthermore, the display apparatus according to the present invention includes a video processing circuit to which R, G, and B video signals are input, a display device that performs display based on the output of the video processing circuit, and a synchronization that is input together with the video signal. A display device excluding the hub unit in a display device having a drive circuit for driving the display device based on a signal, a CPU for controlling the video processing circuit and the drive circuit, and a hub unit for connecting peripheral devices to an external computer Another feature is that a holding means for holding all or part of the identification information transmitted to the hub unit is provided inside the apparatus.

  Furthermore, a display device according to the present invention for achieving the other object includes a video processing circuit to which R, G, and B video signals are input, and a display device that performs display based on the output of the video processing circuit. And a drive circuit for driving the display device based on a synchronization signal input together with the video signal, a CPU for controlling the video processing circuit and the drive circuit, and a hub unit for connecting peripheral devices to an external computer. In the display device, first recording means for holding all or part of identification information mainly including the display device to be transmitted to the hub unit in the display device excluding the hub unit, and the hub in the hub unit Second recording means for holding all or part of identification information mainly composed of units is provided. It is characterized in.

  Furthermore, means for retaining all or part of the identification information transmitted to the hub unit may be provided in the external computer.

It is possible to provide a display device that can flexibly cope with changes in the interface specification with the PC.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a view showing an appearance of a display device according to an embodiment of the present invention. In the figure, 1 is a cabinet and 2 is a serial interface adapter. The serial interface adapter 2 converts an interface specification from an external device such as a PC into an interface specification corresponding to the display device, and conversely converts an interface specification of the CPU of the display device into an interface specification compatible with the external device such as a PC. It works as a mutual conversion.

The display device having the function of mutually converting different interface specifications in the present invention may have a configuration in which the serial interface adapter 2 is incorporated in the portion shown in FIG. This can also be realized with a replaceable configuration.
In the configuration in which the serial interface adapter 2 is built in the display device, the serial interface adapter 2 is attached to the front surface of the cabinet 1 or around the display screen as shown in FIG. This makes it easy to replace connectors.

  In the case where the serial interface adapter 2 can be replaced with another serial interface adapter 2, the serial interface adapter 2 can be attached to or removed from the front of the cabinet 1 or around the display screen as shown in FIG. The ease of operation when replacing the serial interface adapter 2 is improved. The serial interface adapter 2 can be connected to the display device in an external form outside the display device. However, the serial interface adapter 2 is present inside the cabinet 1 as compared with the external form. In any of the configurations, there is an effect that wiring between the display device and the serial interface adapter 20 is not required, and a clean display device can be realized.

  Further, the adapter provided on the front surface of the display device or around the display screen is not limited to the serial interface adapter 2 as the interface specification conversion means. For example, when the communication interface specifications of the display device and the external device are the same, the interface means as an adapter that receives the connection terminal of the interface specification of the external device is designated as the location 2 of the cabinet 1 in FIG. By providing in the vicinity of the power switch, it is possible to facilitate the operation when connecting or disconnecting the connection terminal for communication from the external device.

  FIG. 2 shows a system block diagram including the serial interface adapter 2, a display device, and a computer. 2, the display device includes a serial interface adapter 2, a CPU 10, a video processing circuit 11, a memory 13, a deflection circuit 14, and a CRT 15. The CPU 10 is a universal asynchronous receiver / transmitter (universal asynchronous receiver / transmitter). Hereinafter, this is described as UART.) Controlled by specification information. The UART 18 receives the UART having specifications that can be controlled by the CPU 100. In FIG. 2, the serial interface adapter 2 is provided in the display device. However, as described above, the structure may be detachable from the display device. Further, it is assumed that the PC 3 is used as a computer.

  In FIG. 2, the serial interface adapter 2 converts a serial interface specification of a command or data sent from the PC 3 into a UART specification that can be controlled by the CPU 10 and supplies the converted UART specification to the CPU 10. In contrast to the above, the serial interface adapter 2 converts the UART specification of the command or data sent from the CPU 10 into a serial interface specification suitable for the PC 3 and transmits it to the PC 3.

  When connecting to a PC with a different interface specification by the data, command and communication protocol conversion function of the serial interface adapter 2 described above, the CPU 10 of the display device changes by simply replacing the serial interface adapter 2 conforming to each specification. It is possible to cope with the new serial interface specification without any problem.

  In the present embodiment, the invention is realized by inserting the serial interface adapter into the cabinet. However, even if the serial interface adapter is externally attached to the display device, the same effect as described above can be obtained. Further, the serial interface adapter 2 as an interface specification conversion unit that performs mutual conversion of different serial interface specifications has been described as being provided inside the display device or attachable to the display device. Even when the serial interface adapter 2 has the function on the computer side, the same effect as that provided on the display device side can be obtained.

  FIG. 3 is a diagram when communication is performed between the PC 3 and the CPU 10 of the display device via the RS232C interface, and is an embodiment of the present invention. The RS232C driver / receiver 4 in the serial interface adapter 2 converts the command or data sent from the PC 3 with the RS232C specification into the UART specification of the CPU 10 and supplies it to the CPU 10. In contrast to the above, the information sent from the CPU 10 in the UART specification is converted into the RS232C specification and transmitted to the PC 3. In order to perform inter-interface specification mutual conversion in this case, for example, an amplitude converter is provided in the RS232C driver / receiver 4. This amplitude converter performs voltage amplitude conversion on the RS232C specification signal output from the PC 3 to the display device, and converts it into a UART specification signal of the CPU 10 of the display device. Conversely, the UART specification signal output from the display device to the PC 3 is subjected to voltage amplitude conversion by this amplitude converter, converted into an RS232C specification signal, and transmitted to the PC 3.

  As described above, by mounting the RS232C driver / receiver 4 on the serial interface adapter 2 and inserting the serial interface adapter 2 into the cabinet 1, the PC 3 and the display device of the present invention can perform RS232C communication.

  Next, another embodiment of the present invention will be described with reference to FIG. The above embodiment is an example when converting the RS232C interface specification to the UART specification, while the present embodiment is when converting another serial interface specification having a different communication protocol, command, and data configuration to the UART. It is an example. Since the display device in this embodiment is the same as that of the above-described embodiment except for the configuration of the serial interface adapter 2, only the configuration of the serial interface adapter 2 is shown in FIG. 4 and described. In the embodiment in the case of the RS232C interface described above, the serial interface adapter 2 can handle only the signal voltage and polarity conversion, but in this embodiment, the communication protocol, command, and data configuration of the PC 3 are converted to the UART specification, Conversely, since it is necessary to convert the communication protocol, command, and data structure of the UART specification into the serial interface specification of the PC 3, the serial interface adapter 2 is equipped with a CPU 5 for the conversion. A software configuration diagram for controlling the CPU 5 is shown in FIG.

  In FIG. 5, 51 is a command reception program, 52 is a command conversion program, 53 is a UART transmission program, 54 is a command transmission program, 55 is a command reverse conversion program, and 56 is a UART reception program. Here, the operation of each component of the CPU 5 will be described by taking as an example the case of transferring a command from the PC 3 to the CPU 10 and performing conversion accompanying the transfer. The operation of each component of the CPU 5 when sending data from the PC 3 to the CPU 10 or the operation of each component of the CPU 5 when converting the communication protocol in the communication between the PC 3 and the CPU 10 is the same software as in FIG. The processing can be performed by the control of the CPU 5 according to the configuration.

  The PC 3 internally generates a command and transmits the command to the serial interface adapter 2 mounted on the front panel of the display device in accordance with the serial interface specification communication protocol. The serial interface adapter 2 receives a command under the control of the command reception program 51 and starts processing by the CPU 5. After receiving the command, the command conversion program 52 controls to decode the content of the received command and convert it to a UART specification command configuration supported by the CPU 10. Under the control of the UART transmission program 53, communication with the CPU 10 is performed via the UART in the CPU 10, and the command converted command is transmitted to the CPU 10.

  Here, for example, as a signal output from the PCB, device address information (in this case, a display device) indicating a signal destination device at 1 byte, address information indicating PC 3 at 2 bytes, and command length at 3 bytes A signal having a length of Nbyte (N is a natural number) of the interface specification having command information in the 4th byte and below. The signal output from the PC 3 to the display device is controlled by the CPU 5 by the command conversion program 52, and command information of the 4th byte or less is converted into a command having a length of Mbyte (M is a natural number) which is the UART specification of the CPU 10. Convert. Then, under the control of the CPU 5 by the UART transmission program 53, it is transmitted to the device device (in this case, the display device) indicated by the first byte of the original signal.

  Next, contrary to the above, the operation of the CPU 5 when transferring a command from the CPU 10 to the PC 3 and when performing specification conversion accompanying the transfer will be described. Even in this case, the operation of each component of the CPU 5 when sending data from the CPU 10 to the PC 3 as described above, or the operation of each component of the CPU 5 when converting the communication protocol in the communication between the CPU 10 and the PC 3 is also performed. The processing can be performed under the control of the CPU 5 having the same software configuration as that of FIG.

  First, the CPU 10 transmits an internally generated command to the CPU 5 of the serial interface adapter 2 using UART. The CPU 5 receives a command transmitted from the CPU 10 under the control of the CPU 5 by the UART reception program 56, and converts it into a command configuration supported by the PC 3 under the control of the CPU 5 by the command reverse conversion program 55. Thereafter, the command is transmitted to the PC 3 in accordance with the serial interface specification communication protocol supported by the PC 3 under the control of the CPU 5 by the command transmission program 54.

  Here, for example, as a signal output from the CPU 10 of the display device, device address information (in this case, PC3) indicating the signal destination device at the first byte, address information indicating the display device at the second byte, and address information at the third byte Consider information indicating the length of the command and a signal having a length of M ′ bytes (M ′ is a natural number) of the interface specification having command information in the 4th byte and below. The signal output from the CPU 10 to the PC 3 is controlled by the CPU 5 by the command reverse conversion program 55, and the command information of the 4th byte or less is converted to the length of N'byte (N 'is a natural number) which is the UART specification of the CPU 10. It converts to the command which has. Then, under the control of the CPU 5 by the command transmission program 54, it is transmitted to the device device (PC3 in this case) indicated by the first byte of the original signal.

  With the above operation, even if the interface specification of the PC 3 is changed or the interface specification of the PC 3 is changed as the PC 3 is replaced, the new interface specification of the PC 3 is changed. It is possible to cope with the new interface specification of the PC 3 by simply replacing the serial interface adapter 2 that can be converted into the interface specification. Furthermore, by making the mounting position of the serial interface adapter 2 an easily replaceable portion such as the front panel portion of the display device, the user can replace without moving from the front of the display device, and there is an advantage that it is easy to use.

  In the above-described embodiments, the devices that are subject to mutual conversion of serial interface specifications have been described as display devices and computers. However, the present invention is not limited to this, and digital devices having different interface specifications can be used. It can also be used in communication between signal processing devices in general. An embodiment in this case will be described with reference to FIG.

  In FIG. 12, 131 is a first digital signal processing device, 132 is a second digital signal processing device, 130 is a CPU of the first digital signal processing device, and 133 is a CPU of the second digital signal processing device. 2 is a serial interface adapter similar to that used in the above embodiment. The CPU 130 and the CPU 133 have different interface specifications, and the serial interface adapter 2 can perform mutual specification conversion of information of different interface specifications in communication between the first and second digital signal processing devices.

  That is, the interface specification information of the CPU 130 included in the first digital signal processing device 131 is converted into an interface specification that can be controlled by the CPU 133 included in the second digital signal processing device 132 by the serial interface adapter 2 and communicated. Conversely, the interface specification information of the CPU 133 included in the second digital signal processing device 132 is converted into an interface specification that can be controlled by the CPU 130 included in the first digital signal processing device 131 by the serial interface adapter 2 and communication is possible. It is said. Here, the mutual conversion of the interface specifications in the serial interface adapter can be performed by the same operation as that of the embodiment described in detail in FIGS.

  In FIG. 12, the serial interface adapter 2 is shown as being present outside the first and second digital signal processing devices. However, the serial interface adapter 2 is built in the first or second digital signal processing device. Even if the first or second digital signal processing device is detachable, the interface specification mutual conversion function is realized in the same manner. The effect of the interface specification mutual specification conversion in the communication of the present invention is as follows. It is obtained similarly.

  As a further embodiment of the present invention, FIG. 6 shows a configuration example of a system including the serial interface adapter 2 of the display device, the CPU 10, and the PC 3. The feature here is that the serial interface adapter 2 has a hub. In the figure, 6 is a hub, and 61 is a connection port (hereinafter abbreviated as an upstream port) with the PC 3 as a host. Reference numerals 62, 63, 64, and 65 denote connection ports (hereinafter abbreviated as downstream ports) of peripheral devices. In FIG. 6, the configuration has four downstream ports. The number of downstream ports of the hub 6 may be greater than or less than the number shown in FIG. Peripheral devices connected to the downstream port include peripheral devices such as a keyboard, mouse, joystick, digital camera, printer, and speaker. In the present embodiment, the serial interface adapter 2 includes a hub 6, and the CPU 5 included in the serial interface adapter 2 controls the hub 6 to enable communication between the PC 3 and peripheral devices. However, the hub in the present invention has at least one upstream port to which a computer or the like is connected and a plurality of downstream ports to which peripheral devices are connected, and the computer and peripheral devices via these ports are connected to each other. Assume that the communication system has a function of widening the communication environment of the entire system by expanding the range of communication selection.

  The hub 6 is controlled by the CPU 5 through communication with the PC 3, and according to the control, the peripheral device connected to the downstream port can be selected and information such as a command from the PC 3 can be transmitted. Conversely, information such as data from the selected peripheral device can be transmitted to the PC 3 via the hub 6. Here, the state represented by the selection switch portion for switching the downstream port of the hub 6 in FIG. 6 indicates a state in which the selected peripheral device communicates with the PC 3, and is not selected. Does not indicate a state in which they are not physically connected. Information such as commands and data obtained by the PC 3 by the communication via the hub 6 is transmitted from the PC 3 to the CPU 5 of the serial interface adapter 2 via the hub 6 and further transmitted to the CPU 10 of the display device under the control of the CPU 5. Is done. By controlling the CPU 10 based on the information, the display device can control video display and the like. Data, commands, and the like transmitted from the hub 6 are converted into data, commands, and the like that can be handled by the CPU 10 under the control of the CPU 5 (control equivalent to the control of the CPU 5 with the program configuration shown in FIG. 5). Is transmitted to the CPU 10 via. Further, the UART specification command output from the CPU 10 is transmitted to the CPU 5 via the UART 18, and the UART specification command is transmitted to the PC 3 by the control of the CPU 5 (control equivalent to the control of the CPU 5 by the program configuration shown in FIG. 5). Is converted to a serial interface specification that can be handled, and transmitted to the PC 3 via the hub 6.

  By providing the hub 6 as described above in the serial interface adapter 2, the serial interface adapter 2 of the display device of the present invention can have a hub function. However, although the hub 6 is provided in the serial interface adapter 2 in the present embodiment, the configuration in which the hub and the CPU 5 can communicate with each other is sufficient even if the hub is provided in the display device itself. In the case where the display device itself is provided with a configuration in which the hub is not included in the serial interface adapter 2, there is an effect that it is possible to save the trouble of replacing peripheral devices connected to the hub when the serial interface adapter 2 is replaced.

  A further embodiment of the present invention is shown in FIG. In FIG. 7, 31 is the second PC, and 66 is the upstream port of the PC 31. In the figure, the same numbers as those in FIG. 6 are the same and have the same functions.

  As shown in FIG. 7, the serial interface adapter 2 of the display device according to the present invention can be connected to a plurality of PCs. By the control of the hub 6 by the structure and the CPU 5, for example, the PC 31 is communicating with the PC 3 while the PC 3 is communicating with a peripheral device connected to any of the downstream ports 62 to 65. It is possible to communicate with other peripheral devices connected to downstream ports other than the device. Furthermore, by increasing the number of upstream ports and downstream ports of the hub, a plurality of PCs and peripheral devices can communicate with each other through the hub simultaneously in parallel. It is possible to control by switching the communication with the device freely. In this case, the video displayed on the display device is a video based on the video signal from the PC 3 or PC 31. The displayed video is switched by, for example, a mouse or keyboard connected to the PC 3, PC 31, or the hub 6. Is sent to the CPU 10 by communication via the hub 6 and can be switched by the control of the CPU 10.

  FIG. 8 is a block diagram showing a configuration of a display apparatus according to a further embodiment of the present invention and communication connection with a computer via a serial interface adapter 2. In the present embodiment, the display device includes the second memory 16 in addition to the display device in the embodiment shown in FIG.

  The second memory 16 stores the adjustment voltage range during normal operation of the main part of the display device. In this embodiment, the video processing circuit 11, the deflection circuit 14, the anode of the CRT 15, and the power supply voltage value of the grid The current value is stored. Then, the information stored in the memory 16 can be read by the CPU 10 as necessary, and the information can be transmitted to the PC 3 after the specification conversion using the serial interface adapter 2. By transmitting a video signal for displaying the information to the display device under the control of the PC 3, it is possible to display the content of the information during normal operation of the display device on the CRT 15 of the display device, and to repair the display device when it fails. Can be used as information. In the present embodiment, the memory 16 is provided separately from the memory 13, but the memory 13 and the memory 16 may be configured as a single memory. Further, the contents of the memory 13 and the memory 16 may be stored in the internal memory in the CPU 10, and either one of the contents of the memory 13 or the memory 16 may be stored in the internal memory in the CPU 10.

  As a further embodiment of the present invention, FIG. 9 is a block diagram showing the configuration of a display device and the connection between the display device and a computer via a serial interface adapter 2. In FIG. 9, components having the same reference numerals as those in FIG. 8 have the same functions. In FIG. 9, 91 is a voltage source of the video processing circuit 11, 92 is an anode voltage source of the CRT 15, 93 is a voltage source of the second grid of the CRT 15, 94 is a voltage source of the deflection circuit 14, and 71 is a video processing circuit. 11 is a power supply current detection means, 72 is an anode power supply current detection means of the CRT 15, 73 is an anode current detection means of the CRT 15, and 74 is a power supply current detection means of the deflection circuit 14. The current can be detected, for example, by measuring a voltage drop across the resistor using a resistor in the current flowing section. Reference numeral 8 denotes a switch for switching connection of the voltage and current of each part to the detection means. Reference numeral 17 denotes an A / D converter for converting the detection value of the detection means selected by the switch 8 into a digital signal. The operation in FIG. 9 will be described below.

  In response to a request from the PC 3 or the CPU 10, the A / D converter 17 converts the detection value of the detection means selected by the switch 8 into a digital signal and supplies it to the CPU 10. Although not shown in FIG. 9, the display device of the present embodiment has a level converter for matching the detected value with the dynamic range of the input of the A / D converter 17. The CPU 10 uses the serial interface adapter 2 to send the detection values of the respective parts converted into digital signals and the values of the respective parts at the time of normal operation preset in the second memory 16 or the allowable range information at the time of normal operation to the PC 3. To transmit. The PC 3 can determine whether or not the detected value matches the preset value or is within an allowable range, and can display the result on the CRT 15.

  FIG. 10 is a display example of a comparison result between a value preset in the memory 16 or an allowable range and an actual detection value of each part of the display device. If the detected value matches the preset or is within the allowable range, for example, No Error is displayed. Further, when the detected value is slightly below the allowable range, for example, “Warning” is displayed to indicate that there is an abnormality, and the abnormality content of that portion is displayed on the display device. Further, when the detected value is a serious abnormality such as an overcurrent, for example, “Error” is displayed, and the content of the abnormality is displayed on the display device.

  As described above, the information obtained by the means for detecting the voltage and current of each part is provided with the means for detecting the voltage and current of each part and presetting the value or allowable range during normal operation in the memory 16. By transmitting the information preset in the memory 16 to the PC 3 using the serial interface adapter 2, the abnormality of each part in the display device can be easily known. Further, regarding the display of information of each part in the display device, the display device is not controlled by the PC 3 as shown in this embodiment, but the display device is an on-screen display (hereinafter referred to as OSD). If it has a function, information on each part in the display device may be displayed on the CRT 15 using the OSD function.

  Further, since the serial interface adapter 2 of the display device of the present invention is capable of two-way communication, if a minor abnormality such as Warning is detected, the abnormal part can be readjusted by inputting an adjustment command and a setting value from the PC 3. Can be done and solved.

  Furthermore, items that can be controlled by the CPU 10, such as brightness, contrast, and screen distortion, can be handled by the control of the CPU 10 alone of the display device without the PC 3, so that the initial adjustment at the time of factory shipment can be simplified and the change with time can be suppressed. Is effective.

  As a further embodiment of the present invention, FIG. 11 is a block diagram showing the configuration of the display device and the communication connection between the display device and the computer via the serial interface adapter 2. In the figure, 12 is a liquid crystal module, 121 is a horizontal scanning circuit, 122 is a vertical scanning circuit, and 123 is a liquid crystal panel. The same parts as those in FIG. 2 are denoted by the same reference numerals, and redundant description is omitted.

  This embodiment is different from the embodiment shown in FIG. 2 in that the liquid crystal module 12 is used as a display device. The serial interface adapter 2 of the display device according to the present invention can also be used for a liquid crystal display. The operation in FIG. 11 will be described below.

  Information such as the inherent resolution of the display device read from the memory 13 is transmitted to the PC 3 by communication via the serial interface adapter 2, and the PC 3 identifies video signal specifications and video signal timings adapted to the display device. Then, the PC 3 outputs a video signal corresponding to the information of the display device to the display device side, and the video signal is processed by the video processing circuit 11. The output video signal of the video processing circuit 11 is input to the horizontal scanning circuit in the liquid crystal module, and the input horizontal and vertical synchronization signals are input to the horizontal scanning circuit 121 and the vertical scanning circuit 122, respectively, thereby the liquid crystal panel 123. The video display based on the video signal transmitted from the PC 3 is possible. For a matrix type display device having a fixed resolution, it is possible to request the PC 3 for a video signal having a matching resolution by reporting the resolution of the display device itself to the PC 3. Therefore, as compared with the case of a CRT type display device, less information is stored in the memory 13, and screen adjustment during use of the display device is simplified.

  The matrix type display device to which the serial interface adapter 2 according to the embodiment of the present invention is attached is not limited to a liquid crystal display. In all the above embodiments, all types of plasma, LED, EL, DMD, etc. It can be applied to a matrix type display.

  Further, although the CPU 10 according to the embodiment of the present invention has been described using an example in which a UART is incorporated as a serial interface, a serial interface specification other than the UART does not depart from the present invention. Furthermore, although the serial interface adapter 2 has been described using an example of mounting on the front panel, the mounting position of the serial interface adapter 2 is not limited to the front panel, and there is a similar effect around the display screen. If the mounting position is within a range where the operability can be improved when the user replaces the serial interface adapter, the mounting position does not affect the present invention.

  FIG. 13 shows a configuration example of a display device according to a further embodiment of the present invention. FIG. 14 shows details of the serial interface adapter 2 and its communication relationship.

  The embodiments described so far have been described using the UART as an example of the serial interface between the serial interface adapter 2 and the CPU 10. Hereinafter, the serial interface SI1 between the PC 3 and the hub 6 of the serial interface adapter 2 is referred to as a first serial interface, and the serial interface SI2 between the serial interface adapter 2 and the CPU 10 is referred to as a second serial interface. Here, the communication protocols of the first and second serial interfaces are different.

  The present embodiment is different from the previous embodiments in that the third embodiment also supports a third serial interface for performing communication between the PC 3 and the CPU 5 of the serial interface adapter 2. That is, in this embodiment, a serial interface adapter 2 corresponding to a plurality of types of interface specifications, a display device having the function, and a digital signal processing device are provided.

  Here, a case is considered in which the third serial interface and the second serial interface have different communication protocols. In the following embodiments, the first and second interfaces will be described as having different communication protocols, but this does not preclude the case where they are the same. Hereinafter, the third serial interface is abbreviated as SI3, and an operation example will be described.

  In FIG. 14, the CPU 5 has basic display information such as the manufacturer name, model, serial number, and corresponding signal specifications of the display device to support SI3. Is notified to the PC 3 via the SI 3, the PC 3 can supply an optimum video signal to the display device according to the present invention. Therefore, even if the user does not perform troublesome initial adjustment operations such as image display position and screen distortion, it is possible to always display an image under optimum conditions. The CPU 5 has a command / protocol conversion function, and the PC 3 and the display control CPU 10 can bidirectionally exchange commands or data via the CPU 5, so that the PC 3 can display brightness and color temperature. Further, it is possible to control screen distortion, display size, position, etc., and to acquire adjustment values, identification information, performance information, etc. of the display device, and control based on the display information is also possible. Note that the method of acquiring the display information by the PC 3 may be acquired in a lump, or only necessary information may be selected and acquired individually.

  A further embodiment of the invention is shown in FIG. In FIG. 15, the configuration of the serial interface adapter 2 is different from that of the above embodiment of the present invention.

  This embodiment is different from the above embodiment in that a memory circuit EEFROM 21 capable of rewriting internal data is provided in order to record basic information of the display device described in the above embodiment. The EEPROM 21 may be a general-purpose device having only a normal memory function, or may be a dedicated device having a function for supporting SI3. FIG. 15 shows a configuration using the latter dedicated device, and the operation of FIG. 15 will be described below.

  In FIG. 15, it is assumed that SI3 corresponds to a plurality of different communication levels, and there is a communication level 1 and a communication level 2. Here, the communication level is a voltage level at the time of performing communication control between the PC 3 and the EEPROM 21 via SI3. When the PC 3 is compatible with the communication level 1 of SI3, the EEPROM 21 transmits data to the PC 3 bit by bit in synchronization with the vertical synchronization signal received from the PC 3. When the PC 3 is compatible with the communication level 2 of SI3, the PC 3 outputs a clock signal having a frequency different from that of the vertical synchronization signal. The EEPROM 21 reads the basic information of the display device recorded in the EEPROM 21 in synchronization with the clock signal supplied from the PC 3 and transmits the data to the PC 3. Here, two communication levels of SI3 have been described. However, in the present invention, the types of communication levels are not limited to two. Even at other communication levels, the present invention does not depart from the present invention as long as the PC 3 is a communication level at which the reading control and the communication control of the EEPROM 21 are performed.

  As described above, the EEPROM 21 is provided in the serial interface adapter 2 so that the PC 3 can control reading and communication of the EEPROM 21 corresponding to at least one communication level, whereby the PC 3 can identify the display device having the serial interface adapter 2. It can be performed. Even when a new display device (the basic information is not stored in the EEPROM 21) is connected to the PC 3, by using the EEPROM 21 in which the basic information of the new display device is additionally recorded, the PC 3 becomes a new display device. Can be recognized. That is, it is only necessary to replace the EEPROM 21 of the serial interface adapter 2 with one having new basic information, and the CPU 5 and the hub 6 can be used in common. Further, when an electrically erasable memory is used as the EEPROM 21, it is only necessary to additionally write or rewrite basic information of the new display device in the memory. In this case, the serial interface 2 can be used in common regardless of the type of the display device, and the basic information writing control or rewriting control of the new display device can be easily performed from the outside of the display device. It is.

  In this embodiment, an example in which the electrically erasable EEPROM 21 is used has been described. However, the memory is not limited to the EEPROM 21, and a non-rewritable ROM may be physically replaced. In addition, when an electrically erasable EEPROM 21 area is provided in the CPU 5, the area of the EEPROM 21 in the CPU 5 may be used.

  A further embodiment of the present invention is shown in FIG. In the embodiment of FIG. 16, the configuration of the serial interface adapter 2 is different from that of the above-described embodiment of the present invention.

  In the present embodiment, a device dedicated to SI3 is used as the EEPROM 21 in the serial interface adapter 2, and the reset circuit 22 that can reset the communication operation state of the EEPROM 21 to the initial state is provided. Different from the embodiment.

  The operation in the configuration shown in FIG. 16 will be described below.

  When the communication control between the PC 3 and the CPU 5 is performing communication at the communication level 1 via SI3, the PC 3 cannot recognize the EEPROM 21 when the communication level is switched to the communication level 2. In order to eliminate such an adverse effect, the EEPROM 21 is reset under the control of the CPU 5 so that the PC 3 can recognize the EEPROM 21 at the communication level 2 of SI3. The same applies when the communication level is switched from communication level 2 to communication level 1.

  FIG. 17 shows an example of the reset circuit 22 for resetting the EEPROM 21 in the present embodiment.

  In FIG. 17, 221, 222, and 223 are resistors, 224 is an NPN transistor, and 225 is a power source for the reset circuit 22.

  The reset circuit 22 is a grounded-emitter switching circuit. When the input signal from the CPU 5 is at a low level, the NPN transistor 224 is cut off and the collector terminal of the NPN transistor 224 is at a high level, so that the EEPROM 21 is in a power-on state. It becomes. On the other hand, when the input signal from the CPU 5 is at a high level, the NPN transistor 224 is in an active state, the collector terminal of the NPN transistor 224 is at a low level, and the EEPROM 21 is in a power-off state.

  When the CPU 10 detects the disconnection of the video signal or the synchronization signal from the PC 3, the EEPROM 21 can be returned to the power-on initial state via the CPU 5. Therefore, communication between the PC 3 and the EEPROM 21 can be performed again via SI3.

  In this embodiment, the example in which the EEPROM 21 is returned to the initial state by powering off is described. However, if the EEPROM 21 has a dedicated reset terminal, the output of the CPU 5 may be directly input to the reset terminal.

  As a further embodiment of the present invention, the configuration of the serial interface adapter 2 of the display device is shown in FIG.

  In the present embodiment, the first serial interface specification data and the third serial interface specification data can be recorded / read on the EEPROM 21 in the serial interface adapter 2, and the EEPROM 21 is shared. It is a different and new point.

  By sharing the common data storage area of the first serial interface and the third serial interface, the memory capacity can be reduced.

  A further embodiment of the present invention is shown in FIG. In this embodiment. In the configuration of the serial interface adapter 2 of the display device, the connection position of the EEPROM 21 is different from the embodiment shown in FIG.

  In the present embodiment, a communication line with the CPU 5 in the serial interface adapter 2 is provided independently and exclusively for the hub 6, the CPU 10, and the EEPROM 21.

  By providing a dedicated communication line for each device, even if a communication line is interrupted due to a serious failure such as destruction of the device, the display device indicates that a failure has occurred using the remaining other communication line Can inform users.

  As an example, when the communication line between the CPU 5 and the hub 6 is disconnected, the CPU 5 detects the failure, transmits the failure detection content to the CPU 10 using the communication line between the CPU 5 and the CPU 10 inside the display, The device may display OSD information on the content of the failure and a method for solving the failure. Further, the failure detection content may be transmitted to the PC 3 using the SI 3 between the CPU 5 and the PC 3, and the content of the failure and the method for solving the failure may be displayed on the display device by software control of the PC 3.

  A further embodiment of the present invention is shown in FIG. In the present embodiment, the configuration of the communication relationship between the serial interface adapter 2 of the display device and the CPU 10 is different from that of the embodiment of the present invention. The operation of FIG. 20 will be described below. In the present embodiment, a flag function is provided to notify the CPU 10 in the serial interface adapter 2 via the I / O port that the CPU 5 in the display is in a communicable state. By providing this flag function, communication can be performed without any problem regardless of which of the CPU 5 and the CPU 10 starts the operation first.

  Hereinafter, a case where the CPU 5 starts the operation first and a case where the CPU 10 starts the operation first will be described.

  When the CPU 5 starts the operation first, the CPU 5 sets so as not to communicate with the CPU 10 until it receives a flag indicating that the CPU 10 is in a communicable state from the CPU 10. For example, when the CPU 5 receives a command to be transmitted from the PC 3 to the CPU 10, the command received from the PC 3 is held until it receives a communicable flag from the CPU 10 or is ignored in some cases. Then, after confirming reception of the communicable flag from the CPU 10, communication with the CPU 10 is started, and when the command output from the PC 3 is held, the command is transmitted to the CPU 10.

  On the other hand, when the CPU 10 starts the operation first, the flag indicating that the CPU 10 is communicable when the setting of the I / O port function of the CPU 10 and the initialization of the RAM are finished and the normal operation is started. Is transmitted to the CPU 10, and the operations of the CPU 5 and the CPU 10 are controlled by a program so as to shift to the display control while holding the flag until the communication with the CPU 5 is started.

  By programming the CPU 5 and the CPU 10 as described above, for example, when one of the CPUs is temporarily turned off through a power-off state due to power supply noise or the like, the CPU is in the initial state. Return to. Even if the CPU starts a new operation, it recovers according to the above procedure, and communication is not disabled.

  Further, even if the CPU 5 or the CPU 10 is in a runaway state, it can be recovered by the above procedure to be brought into a normal communication state by forcibly initializing using a forced initialization means such as a watch dock timer. it can.

  Here, a device having the initiative to transmit and receive data is called a master device, and a device that receives and transmits data according to an instruction from the master device is called a slave device. In the embodiment described up to FIG. 19, when data is transmitted from the CPU 5 to the CPU 10, the CPU 5 has a master device and the CPU 10 is a slave device. When the data is transmitted from the CPU 10 to the CPU 5, the CPU 10 is the master device and the CPU 5 is the slave. It had a so-called multi-master relationship that communicated as a device.

  However, the relationship between the CPU 5 and the CPU 10 up to the embodiment of FIG. 19 is not limited to this relationship, and the command data and the like from the CPU 10 to the CPU 5 as in the present embodiment shown in FIG. Can be transmitted to the CPU 5 from the CPU 10 for the first time by using the flag function from the CPU 10 to the CPU 5 to send a command / data to the CPU 5. The CPU 5 is a master device and the CPU 10 is a slave device. May have the relationship as described above. The control under this fixed relationship can perform more stable control than the multi-master, and has an effect of preventing malfunction. Also, product development is easier in terms of functionality than having a multi-master relationship.

  In addition, when the first serial interface and the third serial interface compete with each other, a priority order such as giving priority to the third serial interface in communication with the PC 3 can be provided to maintain a stable communication state.

  A further embodiment of the present invention is shown in FIG. The serial interface adapter 2 of the display device according to the present embodiment is different from the above-described embodiment in that a common reset circuit 23 for the CPU 5 and the hub 6 is provided.

  When the common reset circuit 23 detects a drop in the power supply voltage of the CPU 5 or the hub 6 and an instantaneous interruption of the power supply by the common reset method, the CPU 5 and the hub 6 can be restarted from the initial state. It is possible to prevent malfunction due to interruption. Furthermore, in the initialization process of the hub 6, once the upstream port is disconnected and then reconnected, the connection process to the PC 3 can also be restarted from the initial state.

  In this embodiment, an example in which the reset of the CPU 5 and the hub 6 is made common is described. However, the present invention is not limited to this, and the reset of the CPU 10 may be made common.

  FIG. 22 shows an external view of a display device which is a further embodiment of the present invention.

  This embodiment is different from the other embodiments in that the display device 1 is provided with a reset switch 24 of the serial interface adapter 2 different from the power on / off switch. In FIG. 22, the position of the reset switch 24 is set in the vicinity of the display screen of the cabinet 1 of the display device. However, the position is not limited to this location. For example, the front surface of the serial interface adapter 2 (the hatched portion in FIG. ) And may be provided at a position that can be operated by the user.

  FIG. 23 shows an internal configuration diagram in which the reset switch 24 is provided in the configuration of FIG.

  In FIG. 23, when the user presses the reset switch 24, the common reset circuit 23 returns the CPU 5 and the hub 6 to the initial state, and the upstream port connection with the PC 3 is once disconnected and reconnected. And the CPU 10 is programmed. By programming the CPU 5 and the CPU 10 as described above, for example, when the user knows that the device connected to the downstream port 62 has failed or is in an overcurrent state by OSD display or the like, the device that has failed by the user Is removed from the downstream port 62, reconnected, and the reset switch 24 is pressed, the CPU 5 and the hub 6 of the serial interface 2 can resume operation from the initial state. At this time, when an overcurrent state is detected, it is not particularly necessary to remove the device connected to the downstream port 62.

  In this embodiment, an example in which the reset switch 24 is used as a trigger for resuming the operation from the overcurrent state has been described. However, in other forms, the common reset circuit, the CPU 5 or the hub 6 has an overcurrent. There is also a method of monitoring the state and automatically restarting the operation from the initial state when it is detected that the overcurrent state is resolved.

  A further embodiment of the present invention is shown in FIG. In FIG. 24, one serial interface adapter 2 controls communication with a plurality of displays, and this is different from the other embodiments.

  The number of display devices with which the serial interface adapter 2 according to the present embodiment can communicate is not limited to one, and communication with a plurality of displays is possible by assigning and identifying addresses for each of the plurality of display devices. For example, communication with each core of the multi-screen multi-display device 25 that realizes one large screen by connecting a plurality of display devices as shown in FIG. Control is also possible. In FIG. 25, reference numerals 10, 101, 102, 103, 104, 105, 106, 107 and 108 denote CPUs for controlling the core display device. The PC 3 can perform image quality control such as brightness, color temperature, screen distortion, display size, and position for each core through communication control with the CPU of each core, and the adjustment value of each core (display device) Identification information, performance information, and the like, and control based on the data can be performed.

  FIG. 26 is a block diagram showing a configuration of a display apparatus which is a further embodiment according to the present invention. In the figure, 201 is a PC, 202 is a display device, and 203 is a hub unit. In the display device 2, reference numeral 321 denotes a synchronization processing circuit, 322 denotes a video processing circuit, 323 denotes a CPU, 324 denotes a drive circuit, 325 denotes a display device, and 326 denotes a control data memory. Hereinafter, the operation of each unit of the display device 202 will be described.

  The synchronization processing circuit 321 generates a horizontal pulse (HD) and a vertical pulse (VD) with a predetermined polarity from the input video signal, composite synchronization signal, or HD and VD, and sends them to the video processing circuit 322, the CPU 323, and the drive circuit 324. Supply. At this time, the polarity information of the synchronization signal may be detected and supplied to the CPU 323. The CPU 323 specifies an input signal from the output HD of the synchronization processing circuit 321, the frequency of the VD, and the polarity information of the input synchronization signal, and the brightness, color, display size, display position, distortion, etc. when displaying the video signal. The control data is called from the control data memory 326, and the video processing circuit 322 and the drive circuit 324 are controlled. FIG. 26 shows an example in which the control data memory 226 described above is provided outside the CPU 323. However, the present invention is not limited to this. For example, the built-in ROM of the CPU 323 may be used.

  The video processing circuit 322 performs signal processing such as amplification and level shift on the input R, G, and B video signals based on control information from the CPU 323, and outputs the processed signals to the display device 325. The drive circuit 324 controls the display size, distortion, and the like based on the input synchronization signal and control information from the CPU 323, and drives the display device 325. As described above, by operating each unit, the input video signal can be displayed on the display device 325 as an image. Here, the display device 325 may be a CRT method, a liquid crystal method, or a plasma method, and may be any device that can display an image or characters.

  Hereinafter, the operation of the hub unit 203 will be described. In the hub unit 203, 3U is an up port, 3D1 to 3D4 are down ports, 231 is a hub repeater, and 232 is a hub controller.

  By connecting the UP port 3U to an external computer, the hub controller 232 causes the CPU 323 to send the manufacturer name, product name, serial number, version information of the corresponding standard, character information, power system information, the number of down ports, overcurrent. Identification information such as detection method, availability of return signal from hold, communication protocol, etc. is acquired, and it is recognized as a hub by the PC 201 by replying to an external computer through the UP port. Here, the identification information read from the CPU 323 may be read from the CPU 323 for each piece of information requested from the PC 201, or all necessary information may be read at once before the UP port 3U is connected.

  When the hub unit 203 is recognized as a hub by the PC 201, the hub repeater starts an intermediary operation of communication between the UP port 3U and the Down ports 3D1 to 3D4, and the Down ports 3D1 to 3D4 become operable. If peripheral devices such as a keyboard and a mouse are connected to the Down ports 3D1 to 3D4 in this state, communication with the PC 201 becomes possible, and the peripheral devices connected to the Down ports 3D1 to 3D4 can operate.

  As described above, the display device 202 of this embodiment holds identification information such as the manufacturer name, product name, and manufacturing number of the hub unit 203 in the CPU 323, and the hub unit 203 acquires the identification information from the CPU 323. Then, by replying to the PC 201, the PC 201 can recognize the identification information recorded in the CPU 223.

  When the display device 202 supports a display control function for controlling brightness, display position, size, distortion, etc. from the PC 201, in addition to the hub identification information, the type and adjustment of the control items supported by the display device 202 By recording the range and the like in the CPU 323 and replying to the PC 201 via the hub unit 203, the PC 201 can grasp that the display device 202 supports the display control function and the specification information. The display screen of the display device 202 can be controlled. When display control information is sent from the UP port 3 to the hub unit 203, the hub unit 203 transmits the display control information to the CPU 323 in the display device 202 via the hub controller 232, and the CPU 323 receives the video processing circuit 322 and the display control information based on the received display control information. The drive circuit 324 is controlled.

  As described above, the PC 201 can perform display control of the display device 202 and can acquire setting values from the display device 202.

  Also, identification information for backup is provided inside the hub unit 203 so that the hub controller can acquire identification information from the CPU 323 when communication with the CPU 323 is not completed even after a certain period of time has elapsed or due to a communication protocol error. If this is not possible, the backup information may be returned to the PC 201 to operate as a general-purpose hub. Further, when the identification information cannot be acquired from the CPU 323 as described above, the adjustment items for the display control function may be limited or the display control function itself may be prohibited.

  The hub unit 203 may have either a unit structure that is detachable from the display device 202 or may be built in the display device 202, and is completely different in that it has a hub control function for controlling communication between an external computer and peripheral devices. It is the same. Here, the display device 202 itself is naturally included as a peripheral device.

  FIG. 27 is a block diagram showing the configuration of a display device according to an embodiment of the present invention.

  The same parts as those in FIG. 26 are denoted by the same reference numerals, and redundant description will be omitted. In the above-described embodiment, an example in which the identification information of the hub unit 203 is recorded in the CPU 323 has been described. In contrast, an example in which the display device of the present embodiment is provided with a memory 327 outside the CPU 323 and the identification information of the hub unit 203 is recorded inside the memory 327 will be described.

  The CPU 323 acquires the identification information of the hub unit 203 from the memory 327 and transmits it to the hub unit 203. The interface between the CPU 323 and the memory 327 may be serial or parallel, and in the case of serial, it may be a two-wire system using two signal lines, one clock line and one bidirectional data line. Alternatively, a three-wire system using three signal lines of one clock line, one transmission data line, and one reception data line may be used. In this embodiment, the example in which the memory 327 is provided as a dedicated memory circuit for recording the identification information of the hub unit 203 has been described. However, the present invention is not limited to this, and the identification information of the hub unit 203 is recorded in the memory 326. You may do it. Even in this case, it does not depart from the scope of the present invention.

  FIG. 28 is a block diagram showing a configuration of a display device according to an embodiment of the present invention.

  The same parts as those in FIG. 26 are denoted by the same reference numerals, and redundant description will be omitted. In the above-described embodiment, an example in which data of the hub unit is read from only the memory 327 inside the display device 202 has been described. On the other hand, the display device 202 according to the present embodiment includes the second memory 333 inside the hub unit 203, and selects and records which memory area should be recorded according to the data contents. A point is different from the above-mentioned embodiment.

  For example, since the serial number of the hub unit 203 is a value unique to the hub unit 203, it is desirable to record it in the memory 333 in the hub unit 203. In such a case, the hub unit 203 of this embodiment may be set so that the manufacturer name uses information in the memory 327 and the manufacturing number uses information in the memory 333.

  Further, even if the serial number of the hub unit 203 is received from the memory 327, when the serial number of the hub unit 203 is received from the memory 333, priority is given to the information items such as giving priority to the information in the memory 333. May be. Further, when the information in the memory 333 is missing, the data in the memory 327 may be used as a backup, such as supplementing with the information in the memory 327. Further, when the data cannot be read from both memories, the backup data in the hub controller 232 may be used as the second backup data.

  FIG. 29 is a block diagram showing the configuration of a display apparatus according to an embodiment of the present invention.

  In the figure, reference numeral 204 denotes a second PC. The same parts as those in FIG. 26 are denoted by the same reference numerals, and redundant description will be omitted. In the above-described embodiment, an example in which the hub unit is provided inside the display device 202 has been described. In contrast, the present embodiment is different from the above-described embodiment in that a second PC 204 different from the PC 201 is provided, and the hub controller 232 acquires identification information from the PC 204 via the CPU 323.

  In the present embodiment, it is not necessary to write identification data in the memory 327 in the operation verification at the time of manufacturing, so that the manufacturing cost in terms of time can be reduced. The interface between the CPU 323 and the PC 204 may be serial or parallel. In the case of serial, the above-described two-wire type and three-wire type clock synchronous type may be used, and UART (Universal Asynchronous Receiver / Transmitter) may be used.

  In this embodiment, an example in which the hub controller 232 acquires identification information from the PC 204 via the CPU 323 has been described. However, the present invention is not limited to this, and the hub controller 232 directly receives identification information from the PC 204. Even if it is obtained, it does not depart from the present invention. In this case, any of the various interfaces described above may be used as the interface between the hub unit 203 and the PC 204.

  FIG. 30 is a block diagram showing a configuration of a display device according to an embodiment of the present invention.

  The same parts as those in FIG. 26 are denoted by the same reference numerals, and redundant description will be omitted. In the above-described embodiment, an example in which the hub controller 232 acquires identification information from the second PC 204 has been described. On the other hand, this embodiment is different from the above-described embodiment in that identification information is acquired from the PC 201.

  For example, when the PC 201 fails to acquire the identification information from the hub unit 203, the PC 201 receives identification information as a display device, for example, EDID (Extended Display Identification Data) from the CPU 323, and the hub mounted on the display device 202 from the EDID. The identification information of the unit 203 is extracted and transmitted to the hub controller 232 via the UP port 3U. The hub controller 232 can operate as a Hub Device by writing the identification information received from the PC 201 to the memory 333 in the hub unit 203 and then replying the identification information in the memory 333 to the PC 201. By using a non-volatile memory element for the memory 333, writing of identification information for the second and subsequent times can be omitted. As described above, when each unit operates, the hub unit 203 can acquire identification information from the PC 201 and operate.

  In this embodiment, an example in which the hub unit 203 acquires the identification information via the UP port 3U has been described. However, the present invention is not limited to this. The case of receiving via the CPU 323 does not depart from the scope of the present invention. Further, the EDID storage area may be inside the CPU 323 or the control data memory 326, or a new dedicated memory circuit may be provided. Further, the dedicated memory circuit may be connected to the interface between the PC 201 and the CPU 323 so that the PC 201 directly reads without the intervention of the CPU 323.

  In order to make the explanation easy to understand, the embodiment is shown and described for each item of the present invention. Accordingly, any combination of the embodiments described in the present specification does not depart from the scope of the present invention. Further, the display device is not limited to the CRT, and may be a matrix type such as liquid crystal or plasma.

  As described above, according to the present invention, it is possible to provide a display device that can flexibly cope with changes in interface specifications with a PC. In general, it is possible to provide a device that can perform mutual conversion of interface specifications in communication with devices having different interface specifications.

  In addition, since the hub unit that communicates with the PC acquires identification information necessary as a hub such as a manufacturer name and product number from the display device, it can operate as a hub unit having identification information that is unified with the display device. it can.

  In addition, since the image quality adjustment items and adjustment ranges supported by the display device can be acquired from the display device and returned to the PC, all the adjustment items that can be operated on the display device can be adjusted from the PC by the required amount. it can.

It is a figure which shows one Embodiment of the display apparatus by this invention, and shows the external appearance. 1 is a diagram showing an embodiment of a display device, a computer, and a system configuration according to the present invention. It is a figure which shows the structure of the system which performs interface specification mutual conversion using the serial interface adapter by this invention. It is a figure which shows the structure of the system which performs interface specification mutual conversion using the serial interface adapter by this invention. It is a figure which shows that CPU which the serial interface adapter by this invention has is controlled by software, and controls interface specification mutual conversion. It is a figure which shows the structure of the serial interface adapter which has a hub by this invention, and shows the communication system using a serial interface adapter. It is a figure which shows the structure of the serial interface adapter which has a hub by this invention, and shows the communication system using a serial interface adapter. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the example of the display screen in one Embodiment of the display apparatus by this invention. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the structure of one Embodiment of the system which connected the digital signal processing apparatus using the serial interface adapter by this invention. It is a figure which shows one Embodiment which has a some serial interface as a system configuration | structure of the display apparatus by this invention. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows an example of the memory initialization circuit of the serial interface adapter of the display apparatus by this invention. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows one Embodiment of the display apparatus by this invention, and shows the external appearance. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the structure of one Embodiment of the display apparatus by this invention, and the communication system using the display apparatus. It is a figure which shows the example of the display screen in one Embodiment using multiple display apparatuses by this invention. 1 is a diagram showing an embodiment of a display device, a computer, and a system configuration according to the present invention. 1 is a diagram showing an embodiment of a display device, a computer, and a system configuration according to the present invention. 1 is a diagram showing an embodiment of a display device, a computer, and a system configuration according to the present invention. 1 is a diagram showing an embodiment of a display device, a computer, and a system configuration according to the present invention. 1 is a diagram showing an embodiment of a display device, a computer, and a system configuration according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cabinet, 2 ... Serial interface adapter, 3 ... PC, 5 ... CPU, 6 ... Hub, 10 ... CPU, 11 ... Video processing circuit, 12 ... Liquid crystal module, 15 ... CRT, 25 ... Multi-screen multi-display device

Claims (26)

  The display device having a CPU has a plurality of types of interface specifications for communication with a computer, and has interface conversion means for converting information of the interface specifications for communication with the computer into interface specifications that can be processed by the CPU. A display device.   A display device having a CPU has a plurality of types of interface specifications for communication with a computer, and in communication with the computer, information on one of the plurality of types of interface specifications is converted into an interface specification that can be processed by the CPU. And a display device having interface specification conversion means for converting the interface specification information of the CPU into any of the plurality of types of interface specifications that can be processed by the computer.   In a display device having a CPU, a portion having a plurality of types of interface specifications for communication with a computer, and a portion for attaching interface conversion means for converting information of the interface specifications for communication with the computer into interface specifications that can be processed by the CPU A display device provided.   A display device having a CPU has a plurality of types of interface specifications for communication with a computer, and in communication with the computer, information on one of the plurality of types of interface specifications is converted into an interface specification that can be processed by the CPU. A display device comprising a portion for attaching interface specification conversion means for converting information on the interface specification of the CPU into any of the plurality of types of interface specifications that can be processed by the computer.   5. The display device according to claim 1, wherein the interface specification conversion means has at least one CPU having a specification different from that of the CPU of the display device, and at least one controlled by the at least one CPU. One or more computers and a plurality of peripheral devices can be connected to the hub, and the hub is controlled by the at least one CPU.   6. The display device according to claim 5, wherein a first interface of the computer can be connected to the hub of the interface specification conversion means, and a second interface of the computer is connected to the CPU of the interface specification conversion means. A display device that is connectable.   6. The display device according to claim 5, wherein a first interface of the computer can be connected to the hub of the interface specification conversion means, and a second interface of the computer is connected to the CPU of the interface specification conversion means. It is possible to connect, and it is possible to provide a memory area where basic display information is stored in the CPU of the interface specification conversion means, and to transmit information stored in the memory area to the computer via a second interface A display device characterized by that.   6. The display device according to claim 5, wherein a first interface of the computer can be connected to the hub of the interface specification conversion means, and a second interface of the computer is connected to the CPU of the interface specification conversion means. The interface specification conversion means is provided with a memory means for storing display basic information, and the information stored in the memory means can be transmitted to the computer via a second interface. Display device.   6. The display device according to claim 5, wherein a first interface of the computer can be connected to the hub of the interface specification conversion means, and a second interface of the computer is connected to the CPU of the interface specification conversion means. A display device characterized in that it can be connected and the interface specification conversion means is provided with memory means for storing basic display information corresponding to the specifications of both the first and second interfaces.   9. The display device according to claim 8, further comprising a memory reset unit that returns the memory unit to an initial state under the control of a CPU of the interface specification conversion unit.   9. The display device according to claim 8, wherein a dedicated communication line is provided for each device that communicates with the CPU of the interface specification conversion means.   In a display device having a CPU, the interface specification information in communication with a computer is converted into the CPU interface specification of the display device, and the CPU interface specification information of the display device is converted into a corresponding interface specification of the computer. An interface specification conversion unit having a CPU for performing conversion control, and means for requesting a command or data read from the CPU of the display device to the CPU of the interface specification conversion unit; Display device.   10. The display device according to claim 9, wherein the interface specification conversion means includes reset means for initializing the CPU and the hub of the interface specification conversion means.   10. The display device according to claim 9, further comprising reset means for initializing a hub included in the interface specification conversion means.   9. The display device according to claim 7, wherein the CPU of the interface specification conversion means can communicate with the CPUs of a plurality of display devices.   16. The display device according to claim 15, wherein the plurality of display devices are multi-screen displays connected vertically and horizontally or both vertically and horizontally.   A video processing circuit to which R, G, and B video signals are input, a display device that performs display based on the output of the video processing circuit, and the display device that is driven based on a synchronization signal input together with the video signal In a display device having a drive circuit, a video processing circuit, a CPU circuit for controlling the drive circuit, and a hub control unit for connecting peripheral devices to an external computer, the hub unit is provided inside the display device excluding the hub control unit. A display device comprising means for retaining all or part of identification information to be transmitted.   18. The display device according to claim 17, wherein the identification information includes at least a manufacturer and a character or code for identifying the product.   18. The display device according to claim 17, wherein all or part of identification information transmitted to the hub control unit is provided in the CPU circuit.   18. The display device according to claim 17, further comprising a memory circuit that records all or part of identification information to be transmitted to the hub control unit.   18. The display device according to claim 17, wherein backup information when acquisition of the identification information from the holding unit fails is provided in the hub control unit.   A video processing circuit to which R, G, and B video signals are input, a display device that performs display based on the output of the video processing circuit, and the display device that is driven based on a synchronization signal that is input together with the video signal. In a display device having a drive circuit, a CPU for controlling the video processing circuit and the drive circuit, and a hub control unit for connecting peripheral devices to an external computer, the hub control unit is provided inside the display device other than the hub control unit. A first recording unit that holds all or part of identification information mainly having a display device to be transmitted; and a first recording unit that holds all or part of identification information mainly having the hub controller inside the hub controller. A display device comprising two recording means.   22. The display device according to claim 21, wherein information on the second recording unit is given priority over information on the first recording unit.   A video processing circuit to which R, G, and B video signals are input, a display device that performs display based on the output of the video processing circuit, and the display device that is driven based on a synchronization signal that is input together with the video signal. In a display device having a drive circuit, a video processing circuit, a CPU for controlling the drive circuit, an external computer for connecting peripheral devices, and a hub control unit for connecting to the external computer, the hub control is provided inside the external computer. A display device comprising means for holding all or a part of identification information transmitted to the unit. In a display device having a hub circuit for interposing the first serial communication between an external computer and a peripheral device,
The hub circuit has an interface for performing second serial communication with the control CPU included in the display device, and converts information transmitted via the first serial communication into the second serial communication interface specification. Interface specifications for transmitting the information to the CPU and converting the information sent from the CPU via the second serial communication interface into the first serial communication interface specification and sending it to the computer. A display device comprising a hub circuit having conversion means. In a display device connected to an external computer and having a first communication interface for performing video signal display and display control from the computer,
Display of the display device output from the computer via the second communication interface, comprising interface specification conversion means for connecting to the second communication interface of the external computer and converting it to the second communication interface specification An interface conversion means for converting a control command into a first communication interface specification and enabling display control,
Further, the interface conversion means has a hub means for enabling communication with a peripheral device via the first communication interface.

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