Visual Display Solutions for Railway Terminals
Both, control room operations and passenger information are demanded to be in service 24 hours per day on 365 days per year. This, combined with the difficult operating conditions in a passengerr terminal, requires a highly developed solution for the display of the relevant information.
Video Wall Systems in Control Rooms
Regarding the control room installations, we usually find numerous signal sources including video streams from CCTV cameras and static grids provided from rail management software and building management software. These numerous different signals are often displayed together on one large video wall providing a comprehensive overview to the operators in the control centre. For the technology of the video wall there are two different technologies which come into consideration. The leading technologies for larger control rooms is DLP rear-projection. Here, a set of so-called rear-projection cubes is combined to an almost seamless video wall with a very high resolution. These cubes are available in a wide range of sizes and resolutions to fit any application. The major advantages of DLP cubes are there perfect ability to be operated in 24/7 mode. There is absolutely no danger of burn-in effects with static images and the cubes use components which are optimised for long-term operation. Especially since there has been a change of the light source of the projector from lamps to LEDs which provide more than 50,000 hours life-time in continuous operation. The second technology used in control rooms is Liquid Chrystal Display (LCD). Here you have either a larger number of individual screens or a combined video wall comprising several modular LCD screens. The problem with individual screens is that their size and resolution are limited. LCD-based video walls are assembled of a matrix of "seamless" LCDs. The latest versions of these so-called narrow bezel LCDs allow a gap between the contents of two neighbouring screens in a video wall of less than 7 millimetres. The problem with LCD is the danger of burn-in effects (e.g. image retention) when static image content is displayed for longer periods of time in the same position of the screen. This partly irreversible effect is caused by the composition of the different layers of the screen and is hard to prevent when static content has to be displayed. In control rooms this can be grids or not changing ares in video images. The main advantage of LCD technology is the price of a system compared to DLP cubes and their space saving installation possibility.
Whichever technology is used, it is important to rely on a professional provider. The lower costs for minor quality may be attractive for the initial purchase, but when it comes to reliability, service and operation these savings will not pay off.
Ideally the entire system should be delivered by a provider who offers a complete system including the display solution, the necessary graphics controllers for the connection of the various signals, a wallmanagement softeware solution and all peripherical devices which are necessary for a stable operation. In delicate environments such as control rooms it is absolutely necessary to have perfect compatibility of all devices and systems within the installation to guarantee the service of the transport system and the security of the passengers.
Display Technologies for Digital Signage
Video Screens in public areas have to fulfil different requirements compared with a "controlled" control room environment. There are changes in temperature and humidity, dust, vandalism, different viewing angles and interactivity, to name only some of them. Many different display technologies try to face these demands, but in the end the precise application in hand determines which is the best solution. Most commonly used are LCD displays, either individual screens or video wall arrays of narrow bezel displays. Sometimes we see plasma displays which are perfect with moving video images but very likely to burn in when images or parts of images a re displayed statically for some time. New technologies like small rear projection iles and laser phosphor displays are still evolving, but will become an alternative to LCD, especially because of their possibility to be assembled without a viewable gap between the individual modules. Little rear projection units and laser phosphor displays can be used to set up non-rectangular display arrangements which is especially interesting for advertisement purposes, and secondly their power consumption is decisively less than that of LCD or plamsa screens. So there is no finite answer to the question for an ideal display technology in public areas, there is a wide range of solutions available and everyone finds its application, just ask the expert. We have them all, eyevis - simply perfect visual solutions.
eyevis Gesellschaft für Projektions- und Großbildtechnik mbH
eyevis from Reutlingen in Germany is specialized in the development and production of high-quality large screen systems and guarantees a continuous further development in high-tech, quality and complete specific customer display solutions. Besides the rear projection units, based on the DLP(TM) Technology from Texas Instruments and controllers to manage multi-projection walls, eyevis is also developing intelligent software solutions to achieve a complete, unique and perfect large screen system. The name eyevis stands for quality, innovation, flexible and redundant systems and solutions in the field of large screen visualisation. For every application, whether control room or communications, conference or congress area, foyer, show room, information system, exhibition, convention, event or training centre, eyevis offers a solution tailored to your individual requirements with the best image quality. The product range also includes high-resolution TFT LCD monitors and special solutions for simulation and virtual reality applications.
eyevis' ambitious principle has always been the permanent further development of its product range which aspires to include the most modern technologies in perfect quality. The result of this "state-of-the-art" philosophy is the permanent development of products which constitute cutting-edge technology in their field of application. This makes eyevis one of very few manufacturers who are able to provide complete systems - high-end quality "Made in Germany ".
Thanks to its many years of experience and technological advantage eyevis is the ideal partner for the realisation of complete and customised solutions. Continuous investments in research and development guarantee a head start in the field of large screen technology.
eyevis has a worldwide network of offices, subsidiaries and Service & Sales partners that have trained engineers for consultancy, installation and service for eyevis systems in their country or region. Today, after 16 years of experience and presence in the fields of large screen visualisation eyevis has become one of the leading producers of large screen technology. eyevis systems can be found in numerous control rooms and other applications all over the world.