DLP Rear Projection Big-screen System Design And Application

With the development of computer technology, in image processing technology and the development of the display technology, large screen display equipment is becoming more and more mature, more cost-effective, especially DLP display technology, overcomes the shortcomings of the CRT and LCD display technology, low brightness, contrast and color consistency weakness, gradually become the future development trend display monitor system center. Digital light processing (Digital Light Processing DLP) technology has broken the traditional analog display limitations, improved digital video potential, due to the digital characteristics of DLP, which can generate high brightness, high contrast and high resolution display image, therefore, more and more applications based on DLP technique. Accelerating information construction will make the industry and commercial market for projection and large screen display equipment needs continue to maintain high growth, the popularization of information technology in education deeply and government, city information, as well as a variety of business activities and economic development increasingly active, will become the future industry and commerce market of projection and large screen display equipment demand in the main. At present, all kinds of emergency command center, city traffic, service dispatching center of large screen display system basically adopts DLP rear projection large screen splicing display system. As the industry matures, customers and the development of enterprises has gradually become rational, as the backbone of the industry to promote the development of display of large screen projection mosaic, will promote the integration of large screen display system industry healthy and rapid development.Therefore, this paper on the basis of the relevant literature, analysis of the current design method of DLP rear projection big screen box system, as well as the shortcomings of its existence, the hardware design of large screen box unit (mechanical structure design, the installation position of the reflector, projector type and screen type selection) and DLP rear projection big screen box system software design. The conclusions are as following:(1)Through the analysis of existing large screen structure,the design of an open box structure, breaking the original box independent unit structure, making the box that the weight, cost, transportation have been very big improvement. (2)By analysis of existing screen resin, the resin of the screen will change with change in temperature, thermal expansion and contraction,so that the screen generating internal tension causes to tear, crushed, shedding phenomena. Thereby the mechanical design of a structure, the use of the central section of the sheet structure is bent around a plane normal to the direction of rotation of the plane of the plane segment features, and both ends of the central section along a plane parallel to the plane of the relative displacement direction, hence the plane connecting the two ends of two different materials, allowing the different materials can produce a certain displacement, thereby releasing the stress generated by the deformation accepted.(3)Through the classification of the projector, the choice of parameters, especially the projector lens than the parameter study, thickness design can solve the large screen box unit. Because of the large screen DLP display. One major drawback is the box itself is too thick, the occupied space is large, in the range of small, very difficult to play him in the province’s performance. So the study of the projector lens than the later, can be a very good solution to the problem.(4) Through the study of large screen display system software, design a set of simple operation, quick to master, regulations clear software program. Very good solution to the housing unit too much, resulting in software is very complex phenomenon. The control software system of large screen, which contains the control software interface, operation steps, and splicing the server service instruction. Convenient and user for the system to understand and master the. The development of the control software interface, is our company independent research and development, operation simple, is easy to grasp.In this paper, the design of the DLP rear projection large screen, not only to solve the traditional DLP big screen and bulky cabinet structure, but also solve the problem of screen tension generated by thermal expansion and contraction. There versatility and broad prospects for development of a range.