| With the growing number of electirc appliance in modern cars, the amount of information has increased rapidly. At present, most automobile manufacturers use "instrument panel+colorized screen" as a solution to display information, which is easy to cause the drivers’ inattention and hidden danger. In addition, the traditional mechanical panels have disadvantages such as devices wear and single style.To solve the above problems, we put forward a solution of vehicle intergrated display terminal based on DLP projection technology. Firstly, the dissertation analyzed the functional requirements and implemented the design scheme. The main content of this part of work is transplanting the operating system kernel, designing the root file system and fabricating the device drivers. Secondly, combining with the system software design scheme, the dissertation completed the software work based on the analysis and research of the QT/E graphical interface technology, DLP projection technology, image acquisition method based on luvcview and the redraw technology of Mif map. Thirdly, the dissertation designed and implemented the hardware based on ARM processor. Finally, the dissertation made experiments fro information collection of vehicle, camera collection, video play and electronic maps display on a prototype.The experimental results show the reliable operation of the vehicle terminal system. The system can graphically display the vehicle parameters, such as speed, engine speed, mileage, fuel, water temperature, turn signals, instructions and the date, realize the image collection by camera and video coding, display the electronic map in mapinfo format, play most media files. The technology of DLP projection method makes the pictures more clear and brighter. The system has advantages such as clear projection, exquisite pictures, sensitive response and scalability. The system lays the foundation for the next vehicle field test and the product development. |
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