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Control room large screen display system design and installation process
2011-11-16 by seoer1

Control room in the military command training, industrial production scheduling, network scheduling control, traffic management and other fields play an important role in various systems is the "brain", a variety of intelligence and information system delivered to the control room, a variety of command information transmitted to the control room and from every corner of the system. The current large-screen display system in the control room has been widely used, is the visual center of the control room, so scientific and rational design of large-screen display system rather than simply heap Toru equipment has become an important issue. This paper describes the control room, touch screen LCD module system design steps and in all aspects should be taken note of.

    First, to understand and analyze the situation and requirements of users

    1 Construction Status:

    This mainly refers to the control room inside the geometry, which determines the large-screen display size and location and implementation.

    2, visual business situation:

    Including the main number and location of the observer, the number and location of the observer and the secondary lighting conditions.

    In the design of large-screen display system, different from ordinary view the display, because the function is not only a large-screen display information, and sharing of information and comprehensive information, especially the big screen can not give the viewer the same position and watch the results, so distinguish and identify the main viewer, a minor number of viewers, viewing position and viewing mode is quite important. For example, a large-screen main role is to promote and to visitors to watch, so visitors should visit the channel and watch the position to determine the location and size of the big screen. Lighting control room design and large screen displays are closely linked, should be unified into account. Illumination and uniformity, a direct impact on the large screen display to determine the brightness and contrast, so should be given full attention.

    3, the system information of:

    Including the nature of the signal (computer graphics, video), signal resolution, signal sources and transmission, and also shows the number of signal
Requirements and forms.

    Display system (equipment) The main role is to signal faithfully, so understanding the display signal to the choice of what kind of large-screen display technology has
A direct relationship. For example, a pure video signal display, CRT technology is still the best, and display graphic signal, DLP or LCD technologies have their advantages. The number of signals and also shows the requirements (how many windows simultaneously) with the viewer s position and distance determine the size of large screen and display the number of units.

    Signal transmission and signal quality display device related to the choice of whether or signal processing equipment.

    Second, the combination of ergonomically designed for big screen

    Geometry combined with the control room:

    1, according to the farthest viewing distance to calculate the screen height

    Farthest viewing distance is defined as the last row, the most edge of the screen s distance from the viewer. Large screen display a high degree of general H = MDV/4-8

    2, according to the farthest viewing distance to determine the character size

    As the resolution of human eye is 15 arc minutes, so the minimum character height display L = MDV × tagG15 "= 0.0026MDV

    3, according to a recent viewing distance to determine the width of the screen

    Recent viewing distance the viewer from the first row refers to the big screen in the distance, as the first row of the source of most viewers while watching the big screen graphics will appear when the other side of the deformation and distortion, so the first row of the distance from the big screen and the first row of the table for the width of the arrangements associated with the large screen. In general, most edge of the viewers watch the other side of the graph with no more than 45 degrees, up to 60 degrees. Figure 3, Figure 4.

    4, large-screen high above the ground should ensure that those who watch the rear view, the staff shall be the head over the front or the height of the ladder into the control room design form, the height of the current console is generally between 110-125 cm, Therefore, large-screen high above the ground should not be less than the height of the console.

Third, select the appropriate way to the big screen

    When the screen width and height determined, according to the information display space requirements and allows to choose the way to achieve the big screen. If the information depth of less or projector (using reflection system) allows, you can choose to switch a single-screen display large screen, this is simple, reliable, economical and convenient, this time to take care of the recently, as far as viewing the image viewer degree of detail, select the appropriate resolution of the projector to achieve. If the information does not allow more depth or projection, you can choose to form large-screen multi-screen projection display wall, display wall optical Welds (gapbetween image) has not lost the information for judging based on the LCD module wall patchwork (gap between screen) to a solid structure, the basis for judging the effective fixed screen. Do not have to slit or the blind pursuit of a seamless, which will increase both the cost, will of some potential risk of thermal expansion and contraction.

    Display wall in two ways:

    One is the standard way of projection display units. Single-chip DLP technology is now common projection unit cell size of 50 inches, 67 inches, 70-inch screen uses UCS / GUCS / Blackscreen screen, splicing gap generally less than 1mm, unit resolution of XGA or SXGA, this approach has a small footprint, full screen, high resolution, images delicate features. Another way is to use a customized approach that is based on specific projects, choose the projector, projection screen and screen splicing to form the display wall, the screen size of the unit in this way can be of any size, splicing usually 1-2mm gap so, the projector can choose three DLP, single-chip DLP or LCD projector, XGA resolution unit or SXGA. This flexible, changeable, cost-effective.

    Fourth, the large-screen system equipment selection

    When the display size and display mode determined, it can be large-screen display devices and equipment selected, including, projectors (core), projection screen, mosaic structure, image processing and control equipment, interfaces and conversion equipment, source and equipment of centralized control equipment. In the case of system function to determine, with the budget, the choice is not difficult. Here we must point out that the choice of device performance (technical targets) must be the user s attention. For example, a portable business projector with a projection display wall into the body, brightness uniformity, color uniformity can not be guaranteed. In the control room, the projection should be the necessary choice. Screen should be selected using optical lens screen contrast, anti-glare products, screen pitch smaller than the pixel size to be, to prevent  mole  effect, the focal length of the screen and the projector s focal length to the basic match. With the optical projector screen used in the shaft as far as possible with the projection method, the projector s light field geometry better. Other features include color should have the weight adjustment.

    Mosaic structure of the selection, in addition to meet the patchwork of requirements, selection should be as firm and certain anti-thermal expansion and contraction properties of the product and should be self-supporting characteristics. Image processing and control equipment of choice is primarily to consider the implementation of display and signal processing speed. The choice of interface and conversion equipment must ensure that the signal source does not reduce image quality, bandwidth, signal to noise ratio and other indicators are very important. Centralized control device of choice is primarily considered a friendly user interface and stability.

    Fifth, large-screen system installation

    Installation and commissioning of large-screen system structures involved in the installation and commissioning of electronic systems, should be selected for the professional manufacturers, such as the standard projection unit installation should be selected manufacturers trained engineers and technicians, in particular, customized way, be sure to choose a strong and stable installation team of the company, or endless troubles.

    Six large-screen system testing and acceptance

    Large-screen system testing and acceptance, including acceptance and technical performance of system functions acceptance. Acceptance of the technical performance, structural parameters and acceptance easier, whereas the acceptance of optical parameters requires specialized optical instrumentation, the design parameters involved in the field of view is more difficult to test, only subjective judgments by the expert group. An ideal large-screen system is that each viewer is like looking at his monitor as clear and comfortable, but this is only an ideal, in practice
Does not exist.

In practice, large-screen system to determine a good or bad from the following aspects:

    1, in normal use conditions, screen brightness, contrast and color uniformity;
    2, image, graphic realism;
    3, splicing of the gap is causing loss of information;
    4, the main viewer can see all the information without inconvenience;
    5, the system is as much as possible, "the light to the viewer s eyes";
    6, stable and reliable, less maintenance;
    7, low running costs.

    Seven large-screen system security conditions

    1, clean and maintain the control room ventilation;
    2, the control room s temperature and humidity control in a certain range;
    3, the lighting system and large screen display system to be considered uniform;
    4, the console is designed to meet ergonomic requirements;
    5, the seating layout and business processes to meet the visual requirements.

    Eight, the conclusion

    Large screen display system design, in fact, a room size, seating arrangements, display windows, environmental conditions, use, operation personnel, budget, and many other aspects of the overall balance of the process, only to find out the relationship between these factors, After repeated interaction with the user, to get an optimal design, but also the best value solution.

    Nine, control room design steps

    As a professional large-screen display technology, high-tech company, we uphold the rigorous scientific work style, for the majority of customer service, follow the steps in the control room displays works.

    1, the precise definition of requirements
    2, the draft plan and communicate proposed
    3, the detailed technical design
    4, the technology demonstration program
    5, manufacture and installation
    6, commissioning and acceptance
    7, technical training and after-sales service

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