KR19980027727A - Train route guidance display system - Google Patents

Abstract

The present invention relates to a train route guidance display system, comprising: a central traffic control unit for generating and outputting a driving control signal and driving information of a train in real time; and determining and processing information transmitted from the central traffic control unit for each history; A local control unit; and a reverse signal transmission device for transmitting information transmitted from the central traffic control unit to a corresponding local control unit through a first communication network connected to the central traffic control unit; and the central traffic control unit and the local control unit. A host computer that processes and transmits and receives information required by the central traffic control unit and the local control unit while relaying through a separate second communication network; and a route guide which displays train operation information received by being connected to the local control unit. A central processing unit for processing information transmitted from the local control unit and data output from the central processing unit. A plurality of light emitting device display panels displayed by a plurality of light emitting devices having corresponding information; and monitoring external illuminance on one side of the light emitting device display panel so that the overall display luminance level of the light emitting device is adjusted in response to an external illuminance change. And an external illuminance monitoring unit for outputting a signal corresponding to the central processing unit. Therefore, communication disturbance is reduced by a plurality of communication networks, and the display brightness level of the destination guide is adjusted in response to ambient illumination, and visual information display is maintained at a constant level, and image information having a relatively large amount of data in addition to text and graphic information. Easy to display

Description

Train route indication system

The present invention relates to a train route guidance display system, and more particularly, to a train route guidance display system for reducing communication disturbances by a plurality of communication networks.

The train guide display system is constructed for the purpose of notifying travelers of information related to the operation of the train, such as the next departure, type of vehicle, departure time, etc. in each history.

The train route guidance display system is configured to display transmission contents of the central traffic control unit that manages and controls the information of the train through a display panel in which a mechanically driven flap display panel or an LED light emitting element is arranged in a matrix. The configuration is disclosed in patent publications 87-685, 94-4400.

However, in the conventional train route display system, since the central traffic control unit and the planetary guide are managed by only one communication network, it should be displayed in case of failure of the communication line or the device relaying the connection. It is impossible to transmit data of information related to the operation of a train to cause a display obstacle of train operation information.

Each LED driving unit of the display panel on which the LED light emitting elements are arranged in a matrix is formed of a latch circuit, and is processed by a central processing unit (CPU) having a signal transmitted through an input terminal of the display panel. By adopting a method of controlling the drive unit through a bus, an address bus, and a control bus, it is difficult to expand the function because all components must be redesigned when the function is improved due to the expansion of the display contents such as image related information. have.

In addition, in the conventional display panel, the display luminance level of the light emitting device is not adjusted to correspond to an external lighting environment, so that the difference in luminance level between the external lighting and the display contents is not kept constant, and thus the visual transmission effect of the display contents is stably maintained. There is a disadvantage that is not.

In addition, since the driving signals of the light emitting elements arranged in a matrix form need to recognize the image by the afterimage effect by a dynamic driving method in which the selection of the rows and columns is performed sequentially, the larger the display screen is in relation to the increase of the display content. The light emission holding time of each light emitting device should be shortened, and thus the flickering phenomenon of flickering of the display content to be delivered to the viewer should be increased. Therefore, the increase of the display screen should be limited to a certain range.

The color representation of the display panel is expressed by each of the light emitting devices emitting a predetermined color or a mixture of colors. In the related art, the current flowing through each light emitting device arranged for each of the dual color display colors is controlled so that the color has a multi-level color level. The driving circuit is configured to enable display, and since it includes a non-linear characteristic in which the luminance of the color is not controlled in proportion to the amount of current flowing in the light emitting characteristics of each light emitting device, it is difficult to control the current for color expression, and thus implements a desired color. This is not easy.

In addition, due to the light emission characteristic deviation of each light emitting device, a light or dark area is partially generated. In order to adjust the brightness difference, the driving current is changed so that the brightness level can be adjusted by each light emitting device or a partial block unit. A regulator that can be used is adopted, and this regulator has to be adjusted manually, which causes both the trouble of work and the cost increase factor due to the adoption of the regulator.

The present invention has been made to solve the problems listed above, and an object thereof is to provide a train guide display system capable of stably displaying display information by reducing communication failure.

Another object of the present invention is to adjust the display brightness level corresponding to the ambient illumination, and can be achieved simply without a full redesign of the hardware when upgrading according to the expansion of the display function, and the display content is predetermined regardless of the increase of the display content. It is to maintain the time to solve the flicker phenomenon.

1 is a block diagram showing a train route guidance display system according to the present invention.

Figure 2 is a block diagram showing the configuration of the destination guide of the train guide system of Figure 1;

3 is a block diagram illustrating a configuration of a digital image / graphics adapter of the destination guide of FIG. 2;

4 is a diagram illustrating an arrangement of a light emitting device display panel of the destination guide of FIG. 2;

5 is a block diagram illustrating a configuration of a module that is a partition unit of the light emitting display panel of FIG. 4.

FIG. 6 is a view illustrating a configuration of a second luminance adjusting unit of the module of FIG. 5. FIG.

7 is a view illustrating a configuration according to an embodiment of the second luminance adjusting unit of FIG. 6.

FIG. 8 is a timing chart for signal processing of the second luminance adjustment unit of FIG.

Explanation of symbols for main parts of the drawings

10: central traffic control unit 11: reverse signal transmission unit

12: local control unit 14: automatic broadcasting device

21: host computer 22: clock device

30: destination guide 31: central processing unit

32: hard disk drive 33: storage device

34: external illuminance detection unit 35: analog video / graphics adapter

36: first luminance adjusting unit 40: light emitting device display panel

50: digital video / graphics adapter 51: A / D converter

52: data operation unit 53: memory unit

54: signal distribution calculator 55: buffer

56: clock generator 57: control signal generator

60 module 61 light emitting display unit

62: drive drive 63: second luminance adjustment unit

64: storage unit 65: data transmission control unit

66: Re-Drive 67: Counter

68: decoder 71: shift register

In order to achieve the above object, the train route guide display system according to the present invention obtains the route information of the train and monitors the operation of the train while generating and outputting the operation control signal and the operation information of the train in real time. And a local control unit provided for each history to determine and process information transmitted from the central traffic control unit, and information transmitted from the central traffic control unit through a first communication network connected to the central traffic control unit. A train route guidance display system comprising: a reverse signal transmitter for providing the information to the local controller and a route guide connected to the local controller to display received train operation information, wherein the central traffic controller and the local The central traffic control unit and the local control unit need to be connected while relaying the control unit through a separate second communication network. Loja is a host computer for transmitting and receiving to process the information; and that is provided with that feature.

The destination guide may include a central processing unit for processing information transmitted from the local control unit, and a plurality of light emitting device display panels displayed by a plurality of light emitting devices having information corresponding to data output from the central processing unit. An external illuminance monitoring unit configured to monitor an external illuminance and output a signal corresponding to the central processing unit so that an entire display luminance level of the device is adjusted in response to an external illuminance change; Reads the output data of the processing unit, converts a signal corresponding to text, graphics, and video into an analog signal and outputs an analog video / graphic adapter (VGA); and receives the output signal of the analog video / graphic adapter Digital output converted into digital display control signal and output to the light emitting display panel An image / graphics adapter (cathode-ray tube adapter) is provided, wherein the light emitting device display panel is connected to the light emitting device display unit in which a plurality of light emitting devices are arranged; and drives the light emitting device according to an input signal. And a storage unit for outputting the written display data to the drive drive until the next display data is written through the transmission line. And a second luminance adjusting unit which adjusts a time period during which the display data is output to the driving drive for a predetermined period and adjusts the luminance level of the module by the average luminance level thereof. .

With reference to the accompanying drawings will be described in more detail with respect to the train information display system according to an embodiment of the present invention.

1 is a block diagram showing a train route guidance display system according to the present invention.

Referring to this, the central traffic control unit 10 is provided in each history and the central traffic control unit (10) which obtains information on the destination of the train and monitors the operation of the train and generates and outputs the operation control signal and the operation information of the train in real time. The first communication network and the host which are relayed to the reverse signal transmission unit 11 between the destination guide 30 and the local controller 12 controlling the automatic broadcasting device 14 by processing the corresponding information while communicating with each other. A second communication network relayed to the computer 21 is established.

In this way, the plurality of first and second communication networks are connected to the local control unit 12 that controls the display information of the destination guide 30, so that even in the event of a failure in any one of the communication networks, the normal traffic control and the train routing are related. The guidance information is displayed. As an example, a failure occurs in the transmission line between the central traffic control unit 10 and the reverse signal transmission unit 11, so that the collection information of the reverse signal transmission unit 11 and the underload information of the central traffic control unit 10 cannot communicate with each other. In addition, it is possible to mutually communicate the train route related information through the second communication network between the local control unit 12, the host computer 21 and the central traffic control unit 10. On the contrary, even when a failure occurs in the second communication network, communication of information is made through the first communication network, so that the obstacle of the planetary guide display through the destination guide 30 can be reduced. Such a transmission network failure includes an internal defect of the reverse signal transmission unit 11 or the host computer 21 itself as well as a failure of the transmission line, and thus, there is an advantage to be compensated for the defects of the equipment.

In addition, since the clock device 22 for providing time data to the host computer 21 is provided, the control of the entire system is synchronized with the time signal generated from a single clock, thereby preventing the time calculation error. have.

2 is a block diagram illustrating a configuration of a destination guide of the train guide system of FIG. 1.

As shown, the destination guide 30 provided in each platform or waiting room history to display information including the operation information of the train is connected to the input / output ports of the central processing unit 31 and the central processing unit 31 in charge of signal processing. Installed in a hard disk drive 32 for reading or recording data recorded on a recording medium, a storage device 33 for storing display contents or data processing information, and a light emitting device display panel 40 to detect ambient illumination. The external illuminance sensor 34, which generates and outputs the corresponding data as a signal that can be read by the central processing unit 31, reads the output data of the central processing unit 31, and converts the signals corresponding to characters, images and graphics into analog signals. Outputs the analog video / graphics adapter (35) and the analog video / graphics adapter output to the display control signal It is configured to include a digital video / graphics adapter 50 that outputs to the plate 40.

The external illuminance detector 34 is configured to include a photodetector (not shown) and a current-voltage converter (not shown) that converts a current signal output from the photodetector into a voltage signal and transmits the voltage signal to the central processing unit 31. . When the voltage signal of the current-voltage converter is input to the central processing unit 31, the central processing unit 31 sends the overall luminance level signal selected according to the corresponding voltage level to the first luminance adjusting unit 36 with reference to the stored table table. The first luminance adjusting unit 36 temporarily stores the luminance level signal and transmits the luminance level signal to the digital image / graphics adapter 50. The central processing unit 31, the storage device 33, the hard disk drive 32, and the analog video / graphics adapter 35 function as the components of a general personal computer, and the signal transmitted to the input port is modulated and demodulated. Is input to the central processing unit 31 through the controller (not shown), the instruction is read and the display is output to the analog image / graphic adapter 35, and the signal output from the analog image / graphic adapter 35 is set to the screen. It outputs analog signal corresponding to image information including text and graphic according to size. Although not shown, a signal output from the analog image / graphics adapter 35 is branched to a display device such as a monitor that provides a display content to an operator, and changes the display content of the light emitting device display panel to the central processing unit 31. A keyboard for generating an input signal to operate is connected to the central processing unit 31.

As it is composed of elements that implement the same functions as a general-purpose general purpose computer, expansion of display data and upgrade of other display functions are easily performed by independent expansion of each component, and by using a general-purpose product, various data can be obtained. The use of an executable program for processing also has the advantage of providing compatibility.

In addition, the digital image / graphics adapter 50 reconfigures the digital signal by reconstructing the signal according to the driving of the light emitting device display panel 40 in which a module driven independently of an analog signal output in accordance with a conventional CRT image scanning is arranged in a matrix. Convert to a signal.

The analog signal output from the analog image / graphics adapter 35 is converted into a digital signal reconstructed in accordance with the driving of the light emitting device display panel 40 in the digital image / graphics adapter 50. In this case, the analog image / graphics adapter 35 Since the signal from contains only the information on the display information, the entire display luminance level data outputted from the first luminance adjusting unit 36 is added to output the determined display content and the determined luminance level to the light emitting element display panel 940. do.

A detailed configuration of the digital video / graphics adapter 50 having such a function will be described in detail with reference to the drawing of FIG. 3.

First, the analog signal output from the analog video / graphics adapter 35 is converted into a digital signal by the A / D converter 51 and output, and the digital signal and the first luminance controller are output by the A / D converter 51. The signal output from 36 is added and output by the data calculating section 52, and this signal is controlled to match the display drive and finally supplied to the buffer section 55.

Since the signal output from the analog image / graphics adapter 35 through the data operation unit 52 is a signal generated according to the scanning method of a conventional CRT monitor, an image corresponding to this signal is displayed on the light emitting display panel 40. The signal should be converted to suit the arrangement and driving circuit of the light emitting device display panel 40 as much as possible. To this end, the signal output via the data calculation unit 52 is first stored and output in the memory unit 53, and the signal output from the memory unit 53 is adapted to drive each module in the signal distribution calculation unit 54. After the rearrangement is performed, it is output to the buffer unit 55. The illustrated clock generator 56 sequentially divides and stores the data transmitted from the data operator 52, and is used as a signal for synchronizing the processing of the signal distribution operation. The control signal generator 57 is a clock generator 56. In addition to the module selection signal of the module 60 constituting the light emitting element display panel 40, the control signal required for display driving is generated by the clock signal of the "

The signal output from the signal distribution calculating unit 54 is stored in the buffer unit 55 for a while and then transmitted to the light emitting device display panel 40.

Hereinafter, a light emitting device display panel will be described.

4 is a diagram illustrating an arrangement of a light emitting device display panel of the destination guide of FIG. 2, and FIG. 5 is a block diagram illustrating a configuration of a module that is a division unit of the light emitting device display panel of FIG. 4.

Referring to this, the light emitting device display panel 40 includes a light emitting device display unit 61 in which 16 × 16 light emitting devices are arranged in rows and columns, and light emitting elements corresponding to each display color (red, green, blue). And a storage unit 64 which outputs the written display data to the drive drive 62 for a predetermined time until the next display data is written through the transmission line and the transmission line independently connected to the drive drive 62. ) Are partitioned and arranged in multiple matrices. The signal supplied to the drive drive 62 for driving the light emitting elements corresponding to the respective display colors is supplied via the storage unit 64 to thereby emit light of the light emitting element regardless of the time for which data is supplied from the data transmission control unit 65. The holding time can be maintained at a predetermined time, so that flickering does not occur even in the video display.

The data sending control section 65 supplies the display data inputted to each storage section 64 only when the module selection signal generated from the control signal generator 57 is input.

As the display row is selected by the line drive 66 connected to the other side of the light emitting element display portion 61, the display contents are displayed by driving the drive drive 62 of each display color. The row selection of the line drive drive 66 is processed by determining the signal related to the selected row output from the decoder 68 after the clock signal of the clock generator 56 is counted by the counter 67. The reset signal for resetting the counted value of the counter 67 is a display data error in accordance with the input reset signal even if a display error of the display data for any one row occurs in the row selection which is repeated sequentially. Will be prevented.

In addition, since each module 60 is composed of a plurality of light emitting elements, the luminance is unevenly distributed on the entire display screen arranged in units of modules 60 by compensating for variations in light emission luminance generated from light emitting characteristics of each light emitting element. In order to prevent the image from being displayed, the second luminance adjusting unit 63 is provided to correct the luminance level on a module 60 basis.

The second luminance adjustment section 63 controls the duty ratio, which is the on-time ratio of light emission at a constant level, for a predetermined period corresponding to the selected on / off period of the light emitting element, not for controlling the luminance level of the light emitting element. The level is configured to be adjusted. That is, in each module 60, the display data signal for a predetermined period so as to adjust the light emission display time of the light emitting element displayed by each drive drive 62 to adjust the brightness of the module itself by the average brightness level for a predetermined time. Is configured to control the time output from the drive drive 62 to the light emitting device, and can be implemented by various methods.

For example, from the circuit structure or the storage unit 64 to which the second luminance adjusting unit 63 and the drive drive 62 are connected so as to directly control a signal output from the drive drive 62 to the light emitting element display unit 61. The storage unit 64 and the second luminance adjusting unit 63 may be connected to each other so as to control the supply and interruption of the display data signal transmitted to the driving drive 62.

Further, the circuit may be configured such that the output signal holding time of the storage unit 64 or the drive drive 62 corresponds to one of the holding periods of the output signal during the predetermined period of the second luminance adjusting unit 63. In this case, the duty ratio may be adjusted during the period of the on / off pulse period.

FIG. 6 is a diagram illustrating a configuration of an embodiment of a second luminance adjusting unit of the module of FIG. 5.

Referring to this, the second luminance adjusting unit 63 has a shift register 71 provided for each display color so that the data transmission time output from the storage unit 64 to the respective color drive drives 62 is controlled by the output signal. And a control unit.

The transmission period of the display data transmitted from the storage unit 64 to the drive drive 62 is controlled by the control signal output from the second luminance adjustment unit 63 to the storage unit 64 corresponding to each display color. The emission average luminance of the display color is determined during the period corresponding to the on / off period of the control signal. Each shiftrest 71 provided for each display color stores a brightness control pattern for each color, and generates a corresponding pattern from a pattern data signal corresponding to an average luminance level value transmitted through the data transmission control unit 65 initially. . In the second luminance adjusting unit 63, a pulse pattern determined from a signal input through the data transmission control unit 65 is generated from the shift register 71 so that a bright signal corresponding to an on / off width of light emission is calculated and output. It is. Here, the bright control signal may be generated by itself with a pulse generator, or may be used by branching a signal used by the entire circuit configuration. In this embodiment, the time when the data is transmitted from the control signal generator 57 is transmitted. While the signal used to interrupt the display of the display content was used.

Therefore, the bright control signal has a fixed pulse width when the system is designed, and the pulse width pattern generated inside the second luminance adjusting unit 63 is varied by the input control signal. Is variable. The shift register 71 provided for each color determines the pulse width according to the input control signal and then calculates the pulse width to determine the average light emission duration of the module 60.

7 is a diagram illustrating a configuration of an embodiment of the second luminance adjusting unit of FIG. 6, and FIG. 8 is a timing chart of signal processing of the second luminance adjusting unit of FIG. 7.

For the sake of simplicity, the circuit of the bicolor (red, green) expression is shown.

Referring to this operation, the six shift registers 71, which generate a total of 48 bit pattern steps, store data written through input lines provided for respective colors, and are synchronized with a bright clock signal generated periodically. As the stored data pattern is repeatedly outputted, the terminal output signal and the bright control signal of the shift register 71 are logically operated through the OR gate 72, respectively, and then output as the control signal of each storage unit 64. The first signal added here is a protection signal provided for the purpose of blocking light emission when an abnormality occurs, the second signal is a signal for determining whether to store data, and the third signal is a signal for commanding to store the input pulse data. .

The illustrated circuit is configured so that the light emitting element is driven after the data stored in each storage unit 64 is sent to the drive drive 62 only during the period in which the output signal is low. Therefore, since the light emitting device is driven only when the bright control signal is low and the terminal output signal of the shift register 71 is low, the bright control signal is turned on in the output signal of the second luminance adjusting unit 63 shown in FIG. Low level average holding period of the second luminance adjusting section 63 output by the addition of the low level of the bright control signal and the termination output signal of the shift register 71 during the period of the sum of the high level) and the off (low level) time. This shortens the average luminous holding time during the cycle, resulting in a shortening. The fluctuation of the light emission holding time is changed by the pattern stored in the shift register 71, and each pattern is adjusted in units of each module 60 by determining the light emission deviation of each module 60, and the adjusted data value. When the second signal is input at the high level and the third signal at the low level, the pattern data is automatically sent to and stored in the second luminance adjusting section 63 of each module. Therefore, the light emission deviation of each module 60 is eliminated, and the light emission deviation of each module 60 is not made in hardware. Only the data pattern needs to be operated in accordance with the operation program.

In the illustrated example, the color implementation is implemented by a combination of the three primary colors of red, green, and blue and dichroic, but in order to make the display contents clear and concise, an array of light emitting elements represented by two colors and a driving circuit thereof may be constructed. Can be.

As described above, by providing a train guide display system according to the present invention, communication disturbances are reduced by a plurality of built-up communication networks, the display luminance level of the guide guide is adjusted in response to ambient illumination, and the luminance of a module unit The level deviation correction is easily adjusted so that the visual information display is maintained at a certain level, and the expansion of text / graphic and video display data and other display functions are simply made by the independent expansion of each component. By using this method, compatibility is provided even in the use of an execution program for processing various data.

Claims (9)

Central traffic control unit for receiving the information about the destination of the train to monitor the operation of the train and generates and outputs the operation control signal and operation information of the train in real time, and is provided for each history and transmitted from the central traffic control unit A local control unit for judging information, a reverse signal transmission device for providing the information to a local control unit to which information transmitted from the central traffic control unit is to be processed through a first communication network connected to the central traffic control unit, and In the train guidance display system comprising; a destination guide for displaying the train operation information received in connection with the local control unit, And a host computer configured to relay and connect the central traffic control unit and the local control unit through separate second communication networks to process and transmit and receive information required by the central traffic control unit and the local control unit. Guidance display system. According to claim 1, wherein the destination guide is A central processing unit for processing information transmitted from the local control unit, a plurality of light emitting device display panels displayed by a plurality of light emitting devices having information corresponding to data output from the central processing unit, and overall display luminance of the light emitting devices On one side of the light emitting device display panel so that the level is adjusted in response to the change in the external illuminance, an external illuminance monitoring unit for monitoring an external illuminance and outputting a signal corresponding thereto is provided. system. According to claim 2, Analog image / graphics adapter for reading the output data of the central processing unit converts the signal corresponding to the character, graphics and video into an analog signal; and outputs the output signal of the analog video / graphics adapter And a digital image / graphics adapter for converting the signal into a digital display control signal and outputting the digital display control signal to the light emitting device display panel. The apparatus of claim 3, wherein the external illuminance monitoring unit includes a photodetector for outputting a current signal in response to incident light, and a current-voltage converter for converting a signal output from the photodetector into a voltage signal and outputting the voltage signal to the central processing unit. And a luminance correction signal output after the arithmetic processing by the central processing unit corresponding to the output signal of the photodetector is supplied to the digital image / graphics adapter through a first luminance adjusting unit. The digital video / graphics adapter of claim 4, further comprising: an A / D converter for converting the analog signal into a digital signal; A data calculator for calculating and outputting the digital signal and an output signal of the first luminance controller; And a signal distribution calculator for rearranging and distributing the signals output from the data calculator to match the driving of the LED display panel. And a buffer unit which temporarily stores the output signal of the signal distribution calculating unit and outputs the output signal to the light emitting device display panel. The display device of claim 2, wherein the light emitting device display panel comprises: a light emitting device display unit in which a plurality of light emitting devices are arranged; and a driving drive connected to the light emitting device display unit to drive the light emitting device according to an input signal; And a storage unit for outputting the written display data to the drive drive before the display data is written. The method of claim 6, wherein the module is configured to adjust the light emitting time of the light emitting device so that the display data is output to the driving drive for a predetermined period so that the brightness of the module is adjusted by the average brightness level for a predetermined time. Train line guidance display system, characterized in that further provided with a second brightness adjustment unit for controlling. The light emitting device display of claim 6, wherein the light emitting devices displaying the light emitting colors of red, green, and blue are alternately arranged, and the red, green, and blue color light emitting devices are independently or mixed with each other. And the drive drive is connected to the light emitting element so as to display color. The light emitting device display of claim 6, wherein two dichroic light emitting devices each having a different color are alternately arranged, and the light emitting device displaying the same color and the driving drive are independently connected to each other. Train line guidance display system, characterized in that driven.