KR101021474B1 - full color Variable Message Signboard system for road traffic guidance expression of moving picture - Google Patents

Abstract

An object of the present invention is to implement a full-color signboard that is capable of expressing a total natural color by using the three primary colors of light, such as red, green, and blue LEDs, to achieve high quality image quality and to express the delay of roads on the signboard. In addition, it is to provide a variable information display electronic signage system for guiding road traffic that expresses the road traffic CCTV video to clearly convey to the driver the road lag situation.

The present invention, by connecting the road situation CCTV and the vehicle speed measurement camera to the host computer provided in the road traffic situation room by optical communication or the Internet to grasp the delay section of the vehicle, the real-time video of the road situation CCTV close to the delay section It can be displayed on the variable information display board at the same time with the road situation guidance and detour road guidance text or graphics. To this end, the present invention compresses the video image by the media player of the host computer and processes the image data to remove the top, bottom, left and right parts of the image and then quadruples the resolution by interpolation scanning on the variable information display panel. This improves the display of moving images on a low resolution variable information display panel.

Road traffic information, variable information display board, display board, delay section, video display

Description

Full color Variable Message Signboard system for road traffic guidance expression of moving picture}

The present invention relates to a full-color road traffic information variable information display board system capable of expressing the road situation video, more specifically, the display of the total natural colors by configuring the display panel using the three primary colors of light red, green, blue LED By realizing this full color signboard, it is possible to achieve high quality image quality and to express clearly the road sign status to the driver by simultaneously displaying the road video CCTV video along with the text on the road sign situation. The present invention relates to a variable color information display board system for displaying full-color road traffic information.

VMS (Variable Message Sign board), which is currently used as a road traffic sign board, is formed in the form of a door, and is installed on the side of the road lane or on a side pillar structure that is a side-by-side type. Provide road information to drivers using the road.

However, the LED color prescribed by Korea Expressway Corporation requires red and green LEDs to be used as shown in Table 1 below, and orange and yellow, which are mixed colors of red and green, are required to express colors within the following coordinates. .

Road construction chromaticity coordinate reference table color One 2 3 4 x y x y x y x y Red 0.730 0.270 0.627 0.283 0.569 0.341 0.655 0.345 Orange 0.610 0.390 0.535 0.375 0.470 0.440 0.547 0.452 yellow 0.522 0.477 0.470 0.440 0.427 0.483 0.465 0.534 green 0.405 0.585 0.372 0.493 0.209 0.383 0.013 0.486

Therefore, the use of blue, which is the three primary colors of the color, is limited in the display of the image video, and the road situation is guided only by the actual text and graphics.

However, due to the development of the domestic device industry, low price blue light emitting diodes (Blue LEDs) are being supplied, and due to the development of the media industry, all electronic boards are trending to full color. In particular, drivers using roads are also demanding information of high-quality display boards.

In addition, the driver feels the desire to know the situation more if he is simply informed of the traffic through the variable information display board.

An object of the present invention is to implement a full-color display board that can display a total natural color by configuring the display panel using the three primary colors of the light red, green, blue LED to achieve high-quality image quality and the road of the road It is to provide a full color road traffic information variable signage display system that can display the road situation video that can clearly convey the road situation to the driver by displaying the CCTV video for road situation along with the text of the delay situation.

The configuration of the present invention for achieving the above object is, in the road traffic guidance variable information display billboard system for providing the road traffic situation information to be installed on the road to the driver, in the road situation CCTV and vehicle speed measurement camera Connected via optical communication or the Internet, the vehicle speed data measured by the vehicle speed measuring camera is used to determine whether the vehicle is delayed, and the real-time video of the delayed section collected by the road situation CCTV is displayed on the display board. In order to be able to display the road situation guidance and the bypass road guidance text or graphic, the video of the road situation CCTV of the delayed section is displayed on the monitor by the media player, and the video displayed on the monitor is displayed in the size of the display board. Properly compress the image data and process the image data A host computer for groups; A VMS computer for transmitting and receiving information in optical communication with the host computer, storing data received from the host computer, and outputting the DVI signal data; And 4 times the resolution by interpolation scanning to reconstruct a virtual interpolation pixel by horizontally and vertically recombining the red, green, and blue pixels of adjacent fixed pixels on the display board when inputting DVI signal data output from the VMS computer. It is characterized in that it comprises a full-color variable information display panel for displaying the real-time video of the delay zone sent from the road situation CCTV in full color with the road situation guidance and bypass road guidance text or graphics.

The variable information display panel is a frame memory for dividing and storing the DVI signal data output from the computer for VMS in a frame unit and a time for generating a signal for scanning digital image data to convert the signal into a signal suitable for the size and position of the electronic display board. It consists of an address selector that generates and selects an address using a generator, a signal generator, and a PLD IC, and an even and odd address counter, which makes it possible to display a video by interpolation on a low-resolution variable information display panel. do.

In addition, the control method of the present invention for achieving the above object is, in the control method of the road traffic information variable information display billboard for providing the road traffic situation information to be installed on the road to the driver, CCTV for the road situation and Transmitting vehicle speed data measured by the vehicle speed measuring camera to a host computer by connecting the vehicle speed measuring camera to an optical communication or the Internet; If the vehicle speed data transmitted to the host computer is greater than or equal to the set value, the text for road condition guidance is displayed on the display board, and if the transmitted vehicle speed data is less than the set value, the delay section transmitted from the road situation CCTV located close to the delay section is Selecting a real-time video of the road situation CCTV for the delayed section so that a real-time video can be displayed on a sign board; The real-time video of the road situation CCTV is displayed on the monitor by the media player of the host computer, and only the effective screen that can be displayed on the screen from the screen of the video while compressing the size of the video displayed on the monitor according to the display board. Processing of the image data for invalidating the unnecessary screens of the upper, lower, left and right portions of the screen of the moving image so as to be transmitted; And storing the processed image data in the VMS computer on the display board and outputting the DVI signal data from the VMS computer to full color variable information by the output DVI signal data. The interpolation scan recomposes the virtual interpolation pixels by recombining the red, green, and blue pixels of adjacent fixed pixels on the display panel horizontally and vertically to increase the resolution by four times, thereby providing real-time video of the road situation CCTV. Characterized in that it comprises an image display step for displaying at the same time with the guidance and detour road guide text or graphics.

The present invention implements a full-color electronic display board capable of expressing a total natural color by moving away from the method in which the variable information display panel guiding the existing road traffic situation is monotonically expressed only by letters and graphics using only three colors of red, green, and orange. There is an effect that can be advanced. In addition, by using existing infrastructure such as road CCTVs, vehicle speed measuring cameras and the internet, the real-time video of the delay section can be displayed directly on the variable information display board to clearly convey the road delay situation to the driver. It works.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the configuration of a full-color road traffic information variable information display billboard system capable of expressing the road situation video according to the present invention. In addition, FIG. 2A is a state in which a road traffic guide display is performed by expressing only characters in the same manner as the conventional method in the configuration of a full-color road traffic guide variable information display billboard system capable of displaying a road situation video according to the present invention. 2b shows a road traffic information by displaying a real-time video of a delayed section on a variable information display in a configuration of a variable color information display billboard system for displaying a road situation video according to the present invention. The figure which shows the state which performs a display. 3 is a flowchart of a host computer which is converted into a video mixture or a general text by speed detection by vehicle speed data in a full-color road traffic information variable sign display system capable of displaying a road situation video according to the present invention. .

As shown in the drawing, the currently installed road information information display board system for road traffic guidance, the road speed CCTV (12) installed around the road and the vehicle speed measuring cameras (14) installed to detect the road traffic state is not interlocked If the road is congested due to an accident or an increase in vehicles, the road situation is determined by text on the host computer 16 and judged by the reception room monitor or telephone reception. It works with a simple configuration that transmits and expresses to each other.

The present invention, by using the road situation CCTV (12) and the vehicle speed measurement cameras (14) installed in the road situation CCTV (12) can be displayed along with the character of the road situation CCTV (12), the construction of the system, There is no additional facility. That is, the road traffic CCTV (12) is currently installed in the main traffic point or habitually congested section, the video of the road traffic CCTV (12) is monitored in the road traffic situation room, that is, the road traffic CCTV (12) ) Is displayed on the monitor of the situation room by the media player of the host computer 16 and used as a traffic broadcast or other material. In addition, on the side of the highway, the vehicle speed measuring camera 14 measuring the vehicle speed or the vehicle speed measuring device installed on the road detects the moving speed of the vehicle and displays the estimated time of arrival at the toll gate on the variable information display panel 18. Text to the driver.

The present invention utilizes such existing infrastructure to connect road situation CCTVs 12 and vehicle speed measurement cameras 14 to a host computer 16 provided in the situation room to change a real-time road situation image. It is to be displayed on the information display panel 18. For example, if the vehicle speed is detected by the vehicle speed measuring camera 14 at a maximum speed of 100 km / h or less at 20 km / h or less, a vehicle delay is expected to occur in the section due to an increase in an accident or an accident. When the computer 16 automatically selects an image of the adjacent road situation CCTV 12 and the operator of the situation room checks the data and instructs the corresponding video to display the road guide information on the variable information display panel 18, the display and FIG. As described above, the variable information display panel 18 operates only with letters, and as shown in FIG. 2B, the video operates together to display the video of the delay section.

The speed of the vehicle can be freely set by the program so that it can be set arbitrarily.In the case of a traffic delay of several sections, several sections should be displayed from a short distance. Can be expressed.

As described above, the present invention is an easy invention that can easily display the real-time congestion section video on the variable information display panel 18 by making the most of the existing infrastructure. In addition, when the direct connection between the road situation CCTV 12 and the host computer 16 is not easy, it is also preferable to connect with the road situation CCTV 12 using the Internet. It is convenient to utilize.

In general, since the variable information display panel 18 provides information to a moving vehicle, the vertical resolution is too low to display a video video by being installed at the top of a road to form a long rectangle in a horizontal shape, so that the video video is hardly realized in the current method. This is virtually impossible.

In view of the above, the present invention applies a patent application No. 10-0819501, which is filed by the applicant, to express an image by increasing the resolution by 4 times by applying the "electronic display system having improved resolution by the double scan interpolation scanning method." This makes it possible.

4 is a diagram illustrating a configuration diagram of an interpolation pixel for increasing the resolution of a variable information display panel included in a variable color information display board system for displaying a road color video according to the present invention.

As shown in the drawing, the variable information display panel according to the present invention includes fixed pixels 18a including red, green, and blue pixels, which are three primary colors of light, and red, green, and blue pixels adjacent to the fixed pixels 18a. By constructing the screen by virtually configuring the interpolation pixel 18b using, it is possible to improve the resolution of 2 times horizontally and 2 times vertically. However, when the full screen of the road situation CCTV 12 is displayed by the interpolation method, the resolution becomes insufficient on the road situation CCTV 12 screen, and even if the screen is compressed and designed, the screen is compressed too much and is very rough. It is difficult to grasp the current state of delay.

In order to compensate for this disadvantage, the present invention redesigns the full screen of the road situation CCTV 12 to remove unnecessary screens so as to display a screen recognizable by the driver. For example, a video signal received from the road situation CCTV 12 directly or through an Internet network is displayed on a monitor by a media player of the host computer 18, and according to the size of the video displayed by the media player. The quality of the screen is determined. That is, if the variable information display panel 18 is large enough to display the full screen, it is preferable to display the screen without processing. However, when the variable information display panel 18 has a low resolution, the upper, lower, left, and right portions of the video image are fixed. May be deleted and displayed on the variable information display panel 18.

5 is an image displayed on the variable information display panel in the image displayed on the monitor by the media player of the host computer provided in the configuration of the variable color information display display board system for displaying the road situation video according to the present invention Figure 1 shows an example of processing.

As shown in the drawing, when the resolution of the variable information display panel 18 is low, the variable information display panel having a low resolution is used by using a processed video image in which the upper, lower, left, and right portions of the video displayed on the monitor by the media player of the host computer are deleted. Also in (18), image expression is possible. That is, if the invalid screen 19b is deleted in FIG. 5 so that only the video image valid screen 19a is displayed on the variable information display panel 18, the image display can be performed on the variable information display panel 18 with low resolution. Reference numeral 19c denotes a text guide area 19c positioned on one side of the effective screen 19a on the variable information display panel 18.

According to the present invention, the moving image is compressed to obtain the image data expressed by the variable information display panel 18 from the moving image displayed on the monitor by the media player of the host computer for displaying the moving image on the variable information display panel 18. In addition, after processing the image data for removing the upper, lower, left and right portions of the moving image, the variable information display panel 18 improves the resolution four times by interpolation scanning, thereby making it possible to display the moving image of the CCTV for road conditions 12. .

FIG. 6 is a view illustrating a configuration of a variable information display panel provided in a variable color information display board system for displaying a road color video according to the present invention, and FIG. 7 is a detailed view of an LED driver in FIG. 6. .

As shown in the figure, the road traffic situation room transmits and receives information by optical communication through optical LAN or optical link. In other words, the data of the host computer 16, which has been compressed and processed by the media player of the host computer, is referred to as a variable message sign board computer 110 (hereinafter referred to as a "VMS computer"). Received and stored in the), in the case of the text information is stored and outputs the data according to the schedule to operate the variable information display panel 18. The output data output by the VMS computer 110 is output as a DVI signal.

In addition, the frame memory 112 stores the output DVI signal in red, green, and blue data in units of frames. The frame memory 112 takes a double memory method for reading and writing data. In addition, the time generator 114 and the signal generator 116 convert a signal suitable for the size and position of the variable information display panel 18 and generate a signal for scanning digital image data.

According to the present invention, as described above, the resolution of the variable information display panel is low, and the red, green, and blue pixels of the adjacent fixed pixels 18a are horizontally and vertically reassembled to virtually reconstruct the interpolation pixels 18b, thereby resolving the horizontal and vertical resolutions. In other words, the video is improved by 2 times the resolution, that is, 4 times the total.

Referring to FIG. 4, the fixed pixel 18a corresponds to an even address of red (R), green (G), and blue (B), respectively. Therefore, one frame of an even address is primarily used. ) Display data. In addition, horizontal interpolation is green (G), blue (B) is even N address, red (R) is N + 1 address data to display one frame (Frame) data is twice the resolution. In the case of vertical interpolation, even N address blue (B), red (R), and green (G) take N + 1 address data and express one frame data in the same way, and the resolution is twice as high.

Further, address generation and selection are performed by the address selector 118 and the even and odd address counters 119a and 119b. This circuit configuration, of course, uses a PLD IC (Programmable Logic Device IC).

As shown in FIG. 7, the LED driver 120 performs gray scaling of 10 to 16 BIT PWM to implement a video image. The reference current setting unit sets the limit current of the LED which is the display element. In the static type, the current value is usually set within 20 mA. Individual LED Open / Short failures are detected by the LED error detector, and these error data are collected by the LED DOT error collector 122 and transmitted to the VMS computer 110, and are sent back to the host computer 16 in the situation room. It is to find out whether the electronic board is broken.

According to the present invention, the variable information display panel 18 for guiding the existing road traffic situation can be full colorized according to the era of colorization by breaking away from the method of expressing monotonically only by characters and graphics with only three colors of red, green, and orange, By using existing infrastructures such as CCTV (12), vehicle speed measurement camera (14), and the Internet, which are already installed and operated, the real-time video of the delayed section is displayed directly on the variable information display panel (18) for detailed information to the driver. Can provide

1 is a view showing the configuration of a full-color road traffic information variable information display billboard system capable of expressing the road situation video according to the present invention,

2a shows a state in which a road traffic guide is displayed by displaying only characters in the same manner as in the conventional method in the configuration of a full-color road traffic guide variable information display billboard system capable of displaying a road situation video according to the present invention. Drawing,

2b is a state in which a road traffic information is displayed by displaying a real-time video of a delayed section with a character in a variable information display in a configuration of a full-color road traffic guidance variable information display scoreboard system capable of displaying a road situation video according to the present invention; Is a drawing showing

3 is a flowchart of a host computer that is converted to video mixing or general text by speed detection by vehicle speed data in a full color road traffic guidance variable information display billboard system capable of displaying a road situation video according to the present invention.

4 is a diagram showing the configuration of an interpolation pixel for increasing the resolution of a variable information display panel provided in a variable color information display board system for displaying a road color video according to the present invention;

FIG. 5 is a view showing an image displayed on a variable information display panel in an image displayed on a monitor by a media player of a host computer provided in the configuration of a variable color information display display system for guiding a road color video according to the present invention. It is a figure which shows an example to process,

6 is a view showing the configuration of a variable information display panel provided in a full-color road traffic information variable information display board system capable of expressing the road situation video according to the present invention,

FIG. 7 is a detailed view of the LED driver in FIG. 6.

Explanation of symbols on the main parts of the drawings

12-CCTV for road conditions 14-Camera speed measurement camera

16-Host Computer 18-Variable Information Display Board

110-VMS Computer 120-LED Driver

Claims (3)

delete Connect the road situation CCTV and the vehicle speed measurement camera by optical communication or the Internet to identify the section of the vehicle delay based on the vehicle speed data measured by the vehicle speed measurement camera, and the delay section collected by the road situation CCTV. In order to be able to display real-time video on the road with the road situation guidance and bypass road guidance text or graphic displayed on the billboard, the video of the road situation CCTV of the delay zone is displayed on the monitor by the media player. A host computer for compressing the image data and processing the image data in accordance with the size of the display board for the moving image displayed on the screen; A VMS computer for transmitting and receiving information in optical communication with the host computer, storing data received from the host computer, and outputting the DVI signal data; And expressing a road traffic condition information by displaying a real-time video of a delay section sent from the road situation CCTV along with a road situation guide and a detour road guide character or graphic according to the input of the DVI signal data output from the VMS computer. In the variable information display billboard system for road traffic guidance provided by a variable information display plate, The VMS computer is capable of displaying four times the resolution by interpolation of reconstructing a virtual interpolation pixel by recombining the red, green, and blue pixels of the fixed pixels horizontally and vertically, thereby expressing the total color. Frame generator that classifies and stores DVI signal data output from frame unit, Time generator, Signal generator, and PLD IC which generate signal to scan digital image data so that it can be converted into a signal suitable for the size and position of the display board. An address selector for generating and selecting addresses, and an even-numbered and odd-numbered address counter, which enables the display of moving picture by road interpolation on a low-resolution variable information display panel. Color Road Traffic Information Display Board System. delete

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