1. Design basis
"Electrical Design Code for Civil Buildings" JGJ/T15-92
"Code for Fire Protection Design of High-Rise Civil Buildings" GB50045-95
"Intelligent Building Design Code" GB50045-95
"Industrial Enterprise Communication Design Specification" GBJ42-81
"Industrial Enterprise Communication Grounding Design Specification" GBJ115-87
"Acoustic Characteristics Index of Hall Sound Reinforcement System" GYJ25-85
"Measurement Method for Hall Sound Reinforcement Characteristics" GB/T4959-1995
"RASTI method for objective evaluation of language intelligibility in halls" GB/T14475-93
"Acoustic Characteristics Index and Measurement Methods of Song and Dance Hall Sound Reinforcement System" WH0301-93
2. Design principles
The LCD wall display system may be a terminal expression device for information generated by other subsystems. A good large-screen display system is not only a modern image device for the management control center, but more importantly, with the support of other subsystems, it becomes an indispensable part of daily work. an important missing component.
Among the wide variety of display technologies today, LCD is undoubtedly the most significant generation-changing technology in terms of hardware. Since the display device is a component that directly faces people for a long time, it has a closer relationship with people, especially it cannot affect people's health. Therefore, designing a flat-panel display curtain wall that meets environmental protection and health requirements has become our goal, and environmentally friendly and healthy LCD display technology is undoubtedly our first choice. Of course, environmental protection and health alone are not enough. We design the wall screen display system based on the usability, advancement, reliability and economy of the system to achieve an effect that is both environmentally friendly, healthy and economical and practical.
2.1 System availability
According to the system scale and application requirements proposed by customers for the wall LCD display system, we will select appropriate products in the system to meet the application requirements for large-screen display systems.
We will select different video processing systems according to the customer's requirements for input signals to realize VGA, composite video, DVI, and HDMI signal input to meet different use occasions and different signal input needs. Utilize the LCD built-in image processing system and cooperate with the external matrix to switch various signals. You can choose any signal to be displayed on the whole screen on the large screen or across the LCD screen as a unit; use an external image processor to connect to the current With a network, computer network signals, non-network signals and various video signals can be displayed on the LCD curtain wall.
2.2. System advancement
The system structure adopted should be an advanced and open system structure. The entire system can reflect the development level of today's multimedia technology and be forward-looking and complete.
In the field of display, liquid crystal has absolute advantages and has developed from small to large sizes in the past, fully leading other flat display technologies. The wall screen used by Zhongtian Yungu is DID wall screen, which is the latest technology LCD screen in the world and a professional LCD screen for industrial use. The high-speed dynamic images displayed are smooth and natural. These advantages give DID LCD displays unparalleled advantages in the field of large-screen displays.
Gomany adopts a self-developed embedded splicing system, which breaks through the defects of the traditional PCI card-based system such as complexity, time-sharing processing, and high failure rate, and realizes a new generation of LCD splicing curtain wall with powerful functions, stable system, and simple operation.
2.3 System reliability
The entire system can work continuously 24 hours a day and 365 days a year as required, so the entire video wall advertising screen system must have high reliability and stability to ensure that the system operates continuously and normally all year round.
The main factors affecting system reliability include temperature control, structure, interference, and the service life of the system itself. The high heat generated by the system will greatly reduce the service life of the system components, and if the equipment is heavy, it will be difficult to install and overwhelm the mechanism. In addition, the anti-interference ability of the system also directly affects the reliability of the system.
The Gomany spliced curtain wall LCD screen uses high-reliability DID LCD wall screen, which has low energy consumption and generates very little heat. Even standing in front of the spliced curtain wall, you cannot feel its temperature rise. The unique display principle of LCD, the fully digital drive system, and the air vortex heat dissipation method designed using engineering fluid mechanics ensure the high reliability and stability of the curtain wall. At the same time, the all-steel curtain wall frame and reasonable process design make the curtain wall both No radiation and no interference from external electromagnetic fields, stable and reliable.
Due to its low power consumption, light weight, long life, and no radiation, the LCD video wall advertising screen is extremely reliable and can generally work normally for more than 80,000 hours.
2.4 System economy
Reasonable performance-price ratio is an important content that should be considered in system design. Therefore, the selected equipment must also consider economy on the basis of good performance. In addition to the overall system cost, the long-term operating cost of the system should also be considered.
There are also plasma (PDP) spliced curtain walls on the market, but their prices are relatively high, and due to the problem of plasma burns, they are not suitable for use in some situations where static images are displayed (security, road traffic, ports, terminals, etc.), and the overall cost performance is low. . Although the price of DLP TV wall is relatively low, the annual replacement cost of light bulbs is as high as several thousand yuan per screen. The total cost of a curtain wall ranges from tens of thousands to hundreds of thousands. Over a few years, the cost is staggering.
LCD splicing curtain wall has been widely welcomed at home and abroad for its excellent performance and reasonable price. With a service life of more than 80,000 hours, stable quality and low maintenance costs, it is a wise choice.
