The LED display technology applied on the highway

With the vigorous development of national highway, intelligent transportation management in providing security, improve traffic management efficiency and plays a more and more important role. Traffic information release System is also called traffic induction information System, is expressway monitoring System is an important part of Intelligent Transportation System, Intelligent Transportation System (ITS) important show means. As one of the intelligent transportation management form the information release carrier LED variable intelligence board to display various images and text, notice all kinds of traffic conditions and weather information, release traffic instructions, guarantee the traffic safety. Shows images and text can prior preparation, storage in variable intelligence board controller, also can be in control within the computer on variable intelligence board released compiled with, again at any time.

In the information age, and rapid development of intelligent transportation systems in today, of serving the public transportation, information release become important service contents, various information display devices become the airport, railway stations, docks, bus stops, highway, highway service area, city roads, parks and other public release information dominant means. Among them, the LED display with its high brightness, high reliability, long life, low power consumption, etc. Characteristics popular.

electronic LED display is a kind of display text, images, 2d or 3d animation, TV, video, video signals such as the ideal of VCD of public information display media, this display technology in many fields of social economy is widely used, traffic information display is one of the most important applications. The LED screen is the 1990s the new flat panel display device appears, is the collection photoelectron technology, microelectronics technology, computer technology and video technology for the integration of high-tech products, it is partly by LED (light-emitting leds) assembles composition, its advantage is less power consumption, high luminance, clearly, colourful, long service life and stable performance.

Variable intelligence board commonly the display surface by LED screen array constitute, this shows of each a luminous array also known as a unit each pixel, pixels by different glowing colors (red, green, blue, yellow) LED tube in accordance with certain proportion of combination becomes. Variable intelligence board itself is display driver, testing and control function, also equipped with remote communication interface, and center to realize communication.

Currently in highway generally use the screen body has two kinds: one kind is double colors for the red and green screen, double colors, 256 level gray, can show 65536 colors; Another kind is full color displays for red, green, blue three colors, 256 levels greyscale full color displays can show more than 1600 million colours.

In order to reduce highway traffic congestion and traffic accident occurrence frequency, improving highway operation conditions and the existing security system to reduce traffic accidents, traffic congestion and secondary accidents, crowded brings the delay and loss expressway, we should give full play to the role of information release system for highway safety, high speed and smooth running escorting.

Various forms of the led panel become traffic misleading information major release carrier, common traffic induction LED display means has led sign variable intelligence board, path signs, variable identification marks, etc. Traffic misleading information outdoor LED display, according to the road traffic management requirements and transportation induced the actual situation of information release shows in specific use function, has the following characteristics: high brightness, angie reasonable; Display color with red, green, yellow Lord; Display brightness automatically adjustable; All-weather work, complex environment conditions; Remote control, intelligent detection; Safety, real-time, accuracy, high reliability.

1, conveyor variable electronic led display screen
Conveyor variable electronic intelligence panel is a highway main information dissemination way, because generally adopted bulky across the road frame which is fabricated according as variable electronic display of stents, by the main monitoring computer through the communication network implement remote control, transmission and display various graphic information, released to the driver of the different sections in different road conditions and all kinds of traffic information and traffic regulations, traffic propaganda of knowledge, to reduce highway reproducibility jams, reduce highway the reproducibility, improve the influence of accident safety purpose; Thus effectively relieves traffic, improving highway efficiency.

2, variable speed-limit display (board)

Variable speed-limit screen mostly set in some roads complicated or extra large bridge in the key sections, many round or single arm hanging single block screen primarily. By monitoring center computer through the communication network implement remote control, transmission and display of this route traffic information or brief speed mileage, rise to tip vehicles driving, according to the speed limit the role of impair safety.

3, mobile traffic information led displays
In highway construction and maintenance, the highway departments or construction temporary personnel will lanes closed or change lanes, how be traffic information told road user is very important. Stationary variable intelligence panels limited to road construction sites are uncertain or distance, is not easy to perform. And mobile traffic information screen (on-board screen) has small flexible lightsome, suitable for installation in tow vehicle, hanging anytime and anywhere in target site directly display place, to make up for the lack of fixed variable intelligence board.

4, orientation means (p) and screen

To ensure highway construction work personnel and vehicles and normal operation of the other vehicle safety, highway traffic must install eye-catching homework to warning sign, high brightness and guide the subsequent other vehicles, avoid accident's occurrence. And orientation warning screen of highway construction is the necessary equipment operation vehicles.

5, service screen

Service LED panel refers to the station and service fee to provide various kinds of service and installation of the LED equipment propaganda. Through the toll plaza, the service of the parking lot, indoor installation of the LED sign in time for the past company by personnel to provide real-time traffic and services to help and other kinds of information, convenient company by personnel's travel, improve the management level of sections of and external image.

6, endnotes
Highway LED information release system not only enhance the highway speed and driving safety and improve the operation efficiency, more important is achieved good social benefits. To believe that with the national highway traffic mileage, and the increasing improvement of computer technology, the perfection of the highway monitoring technology, the system will be in highway play more and more important role.