JP2015200780A - display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique of early detecting failures of a dot matrix display.SOLUTION: Lighting data (red) taken into a registry (red) 75 of a first LED module 70a is output to a second LED module 70b. The second LED module 70b takes the lighting data (red) into its own lighting data (red) 75 and outputs the data to the next module, a third LED module 70c, as in the case of the data in the first LED module 70a. The similar operation and processing as the above are thereafter sequentially performed and lighting data (red) taken into a registry (red) 75 of the last module, a sixth LED module 70f returns back to an input section 62.

Description

  The present invention relates to a display system, for example, a display system having a failure detection function of an LED display device installed in a railway station or the like.

  Indicators are installed in railway stations to inform users of destinations and departure times. FIG. 1 is a functional block diagram showing a configuration of a display system 101 according to the background art. The display system 101 includes a dot matrix type LED display 150 installed on a platform of a station and a guidance control device 110 installed in a signal equipment room. The guidance control device 110 includes a guidance control logic unit 120 that performs display control of the LED display 150 and monitors failure. The LED display 150 includes an LED display unit 170 that is a dot matrix LED module, and an LED control unit 160 that is an LED controller that performs lighting control. The LED display unit 170 displays, for example, the departure time and destination of the next train.

  Here, with reference to the timing chart of FIG. 2, the process at the time of occurrence of the failure will be briefly described together with the process at the normal time. First, normal processing will be described. The guidance control logic unit 120 outputs a display instruction to the LED display 150. The LED control unit 160 outputs a signal for controlling the lighting of each LED constituting the LED display unit 170 as an LED display instruction. Further, the LED control unit 160 replies that the display instruction from the guidance control logic unit 120 has been properly received. In this way, the guidance control device 110 (guidance control logic unit 120) causes the controller (LED control unit 160) for outputting a lighting signal to the dot matrix LED module (LED display unit 70) to fail for some reason. Failure detection processing is performed.

  As this type of failure detection technology, for example, when detecting a failure of a display unit, each display unit is set to a through mode by a through setting signal, and check data is provided instead of the display data. There is a technique that receives an input of time series synthesis of output data of a monitoring gate (see, for example, Patent Document 1).

JP 2005-55730 A

  By the way, as shown in the process at the time of failure in FIG. 2, when a failure occurs in the LED display unit 170 and a part is not displayed, the guidance control device 110 (guidance control logic unit 120) cannot grasp it. was there. That is, when a failure occurs in the dot matrix LED module itself, it is difficult to grasp in the signal equipment room, and the occurrence of the failure is recognized by actually checking the display on the LED display unit 170 visually. For this reason, countermeasure technology was required.

  The technique disclosed in Patent Document 1 requires a mechanism for detecting a failure in units of one character (or module) (sending monitoring signal and monitoring data), and the configuration and processing tend to be complicated. , Another technology was sought.

  This invention is made | formed in view of such a condition, and it aims at providing the technique which can solve the said subject.

The display system 1 of the present invention includes a display device group including a dot matrix type display element group and a controller of the display element, and a control logic unit that performs lighting control of the display device. A signal output from the controller to the display element group is returned to the controller, and the controller compares the signal output to the display element group with the returned signal, and the display element group is faulty. Determine the presence or absence.
The dot matrix type display element group is configured by connecting a plurality of modules in which display elements are arranged in a matrix, and a lighting signal for lighting the display element group passes through all the modules. It may be returned to the controller.

  The present invention can improve the detection efficiency of the occurrence of a failure in a dot matrix type display.

It is the schematic of the display system based on background art. It is a chart figure which shows the operation | movement process of the display system based on background art. It is a schematic diagram of a display system concerning an embodiment. It is a functional block diagram of the LED display which concerns on embodiment. It is a figure which shows the input image of the LED control part when a LED indicator is normal, and the display image of a LED display part based on embodiment. It is a figure which shows the input image of the LED control part at the time of failure of the LED indicator, and the display image of an LED display part based on embodiment. It is a figure which shows the input image of the LED control part at the time of failure of the LED indicator, and the display image of an LED display part based on embodiment. It is a chart figure showing operation processing of a display system concerning an embodiment.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the drawings.

  FIG. 3 is a functional block diagram showing a schematic configuration of the display system 1 according to the present embodiment. The display system 1 includes an LED display 50 and a guidance control device 10 that outputs information (display instruction information) to be displayed thereon.

  The guidance control device 10 includes a guidance control logic unit 20 that performs display control of the LED display 50 and monitors failure. That is, the guidance control logic unit 20 outputs information (display instruction information) to be displayed on the LED display 50 to the LED control unit 60 of the LED display 50.

  The LED display 50 includes an LED display unit 70 that is a dot matrix LED module, and an LED control unit 60 that is an LED controller that performs lighting control thereof.

  The LED display unit 70 includes red and green LED elements in a matrix. The LED control unit 60 generates display data to be set for a plurality of LED elements constituting the LED display unit 70 based on the display instruction information acquired from the guidance control logic unit 20, and as LED display instructions (going) While outputting, the display data after use are acquired as LED display instructions (return). Further, the LED control unit 60 compares the LED display instruction (going) with the LED display instruction (returning) to monitor whether or not a failure has occurred in the LED display unit 70, and the failure has occurred. If it is determined, the information is notified to the guidance control logic unit 20. If a failure has occurred in the LED control unit 60 itself, this is output as failure information 1, and if a failure has occurred in the LED display unit 70, this is output as failure information 2. The failure information 1 may be a reply signal indicating that the display instruction from the guidance control logic unit 20 has been properly received. If the condition information is not satisfied, the guidance control logic unit 20 Recognizes failure occurrence.

  FIG. 4 is a functional block diagram showing a schematic configuration of the LED display 50. Here, a configuration focusing on signal transmission / reception between the LED control unit 60 and the LED display unit 70 is shown, and a data transmission / reception function and a data conversion function with the guidance control logic unit 20 are the same as those of a known controller. Therefore, explanation is omitted.

  The LED control unit 60 includes an output unit 61 and an input unit 62 as a data transmission / reception function with the LED display unit 70. The output unit 61 outputs a clock signal, an address signal, lighting data (red), and lighting data (green) to the LED display unit 70 as an LED display instruction (going). Further, the input unit 62 acquires the clock signal, address signal, lighting data (red), and lighting data (green) used and returned by the LED display unit 70 as LED display instructions (return).

  The LED display unit 70 includes first to sixth LED modules 70a to 70f arranged in a line. The first to sixth LED modules 70a to 70f have the same configuration. In the drawing, the internal structure of the first LED module 70a is shown, and details of the other modules are omitted.

  The first LED module 70a includes an LED panel 71 in which red and green LED elements are arranged in a dot matrix, an input IF 72 and an output IF 73 that are interfaces with the LED control unit 60, a timing controller 74, and a red light. A registry (red) 75 and a driver (red) 76 for setting data to a red LED element, and a registry (green) 77 and a driver (green) 78 for setting green lighting data to a green LED element are provided.

  These configurations are different from the known configurations in that the signals used for setting as described above are fed back to the LED display 50.

  That is, the lighting data (red) taken into the registry (red) 75 of the first LED module 70 a is output to the second LED module 70 b via the output IF 73. The second LED module 70b takes in the lighting data (red) sent from the registry (red) 75 of the first LED module 70a via the input IF 72 into its lighting data (red) 75, and Similarly to the LED module 70a, the data is output to the third LED module 70c, which is the next module. Thereafter, the same operations and processes are sequentially performed, and the lighting data (red) taken into the registry (red) 75 of the last sixth LED module 70f returns to the input unit 62 via the output IF 73. Similarly, the lighting data (green) taken into the registry (green) 77 of the first LED module 70a is sequentially sent to the second to sixth LED modules 70b to 70f, and finally to the input unit 62. Return. Note that the clock signal and the address signal are set by paths branched to the respective timing controllers 74 of the first to sixth LED modules 70a to 70f.

  FIG. 5 is a diagram illustrating input / output signals of the LED control unit 60 and a display image of the LED display unit 70 when the LED display 50 is normal. Here, as shown in the figure, an example is shown in which “AIOKOKEKEKKEKO” is displayed on the LED display unit 70 in a normal state.

  6 and 7 are diagrams illustrating input / output signals of the LED control unit 60 and a display image of the LED display unit 70 when the LED display 50 is out of order.

  In the example of FIG. 6, the lighting data (red) and (green) output from the output unit 61 are different from the lighting data (red) and (green) input to the input unit 62. As a result, the latter half of the LED display unit 70 is displayed indefinitely. When the LED control unit 60 detects this state, the LED control unit 60 notifies the guidance control logic unit 20 accordingly. Generally, a failure has occurred in components such as the registry (red) (green) 75 and 77 and the driver (red) (green) 76 and 78 mounted on the LED substrate.

  In the example of FIG. 7, the lighting data (red) and (green) output from the output unit 61 and the lighting data (red) and (green) input to the input unit 62 are different from each other as in FIG. In addition, the clock signal or address signal is in a different state. As a result, the latter half of the LED display unit 70 is displayed indefinitely or displayed in a no-light state. When the LED control unit 60 detects this state, the LED control unit 60 notifies the guidance control logic unit 20 accordingly. Generally, a failure has occurred in components such as the registry (red) (green) 75 and 77 and the driver (red) (green) 76 and 78 mounted on the LED substrate.

  FIG. 8 is a chart showing an operation process in the display system 1 so that the normal time and the failure time can be compared. First, when normal, a display instruction is transmitted from the guidance control logic unit 20 to the LED control unit 60. The LED control unit 60 outputs an LED display instruction (going) to the LED display unit 70 based on the display instruction. As described above, the LED display instruction (return) returns to the LED control unit 60 via the first to sixth LED modules 70a to 70f.

  The LED control unit 60 collates and compares the LED display instruction (going) and the LED display instruction (return), and if it is appropriate (usually the same), notifies the guidance control logic unit 20 of “verification OK”. Individually, if a failure has occurred in the LED display unit 70 (first to sixth LED modules 70a to 70f), the LED display instruction (going) and the LED display instruction (returning) are inconsistent or the LED display The instruction (return) does not return within a certain period. In that case, the LED control unit 60 outputs “verification NG” to the guidance control logic unit 20. In the case of “verification NG”, the guidance control logic unit 20 notifies the administrator or the like of “occurrence of failure”.

  As described above, according to the present embodiment, the LED control unit 60 acquires the LED display instruction (going) output to the LED display unit 70 as the LED display instruction (return) after using the LED display unit 70, and the LED display instruction ( Since it is compared with the LED display instruction (return), it is possible to detect the occurrence of a failure without directly checking the LED display unit 70 by visual inspection. As a result, the failure of the LED display unit 70 can be detected early.

  In this method, normal display data itself is collated, so that a separate mechanism for performing failure detection is not required, and failure detection can be performed in units of display stages.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to each of those components and combinations thereof, and such modifications are also within the scope of the present invention. For example, in the above-described embodiment, the LED display unit 70 exemplifies a configuration in which LED elements of two colors of red and green are provided in a matrix shape. However, the present invention is not limited to this, and LED elements of one color or three colors or more The present invention can also be applied to a so-called full-color display device. In addition, the display system 1 of the present embodiment is not limited to a configuration installed in a railway station, and an administrator or the like always displays a screen like a display device used as a digital signage (electronic signboard). The present invention can be effectively applied in a system that does not view directly.

DESCRIPTION OF SYMBOLS 1 Display system 10 Guidance control apparatus 20 Guidance control logic part 50 LED indicator 60 LED control part 61 Output part 62 Input part 70 LED display part 71 LED panel 72 Input IF
73 Output IF
74 Timing controller 75, 77 Registry 76, 78 Drivers 70a to 70f First to sixth LED modules

Claims (2)

A display device comprising a dot matrix type display element group and a controller of the display element group;
A control logic unit that performs lighting control of the display,
The display has a configuration in which a signal output from the controller to the display element group is returned to the controller,
The display system, wherein the controller compares a signal output to the display element group and a returned signal to determine whether or not a failure has occurred in the display element group.   The dot matrix type display element group is configured by connecting a plurality of modules in which display elements are arranged in a matrix, and a lighting signal for lighting the display element group passes through all the modules. The display system according to claim 1, wherein the display system is returned to the controller.

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