Military Modular Design Of The Liquid Crystal Display And Research

As we know, display is an important device used to show information. For military systems, from big fixed equipment, mobile equipment to portable instrument, all need to be equipped with display. It is obvious that the military display is absolutely necessarily in modern war.Nowadays, with the development of the display technology, the flat display has become the chief choice for information display in military, and LCD plays the leading role. The modularization of display control circuit has become an important trend for the military LCD in the world. For example, Barco, which is a famous company in manufacturing military display products, has developed a series of RMFD (Rugged Modular Flat Display). After the modularization, the users can define a configuration that meets their specific requirements by selecting different modules instead of redesign. Based on the research of military LCD in the world, the modularization of military LCD control circuit and the solutions of rugged machine are described in this paper, and some modules have been developed.In this paper, both the solutions of how to divide the LCD display control module and the design of the modules are provided. There are seven modules. Including: IMB(Interface Mother Board), PSB(Power Supply Board), DIB(Digital Input Board), AIB(Analog Input Board), IIB(Image Input Board), BIT(Built-in Test), HIL(Hiden Intermodule Link). The users can integrate a MFD system to suit each user's requirements by combining the modules with the HIL.Based on the research of these environmental factors, such as temperature, vibration, shock, EMC, damp and so on, the detailed rugged means of LCD against harsh environment are proposed in this paper. It has given the solutions how to troubleshoot the problem of AMLCD at low-temperature environment, including thermal power theoretical calculation of ITO heater-film, the technology of built-in ITO soft heater-film in LCD, and heat control circuits at low temperature, etc. This paper presents a way to solve the problems, namely, LCD response slowly, and even not work in low temperature environment. In addition, this paper also researches into the features of vibration, shock and EMC, and gives the means of how to solve them by reinforcing rigidity, shielding and filter etc.