Airborne High-resolution Lcd Controller Hardware And Software Design

Pilots depend on kinds of monitors in the cabin to gain information, to operate and to control the airplane. Their performances determine the functions of cabin display, which is a foundational device for tactical digitization and service operations in the 21st century with the responsibilities of fusing increasingly large amount of displayed information in forms of character, graphics and pictures. High-tech displays, featuring fine definition, high resolution, super-wide screen, multi-window and large color screen has grown steadily in popularity in cockpit configuration. While single display can not all accomplish what has mentioned above up to date, double screens placed together without slot can satisfy the requirements easily.The tiled screen PDP(Plasma Display Panel) or two LCDs connected together are adopted for tiled screen conventionally. For PDP, the low spatial resolution and the distance requirement which is inappropriate for indoor viewer impeded the application. Consequently, it has little practical value for aircraft cockpit demonstrator. Meanwhile, two LCDs connected together with slot width of 1~3 centimeters cannot be entitled as seamless ultra wide screen, so that it is still useless. Double screens placed together instead of single one can achieve 2048 by 768 resolution and 8:3 aspect ratio. It is highly useful.According to LCD related DVI interface, SDRAM structure and instruction, as well as FPGA design measures, a project based on FPGA is presented in the dissertation. In virtue of inside memory of FPGA as a buffer, a real-time video processor for SDRAM is accomplished, and frame memory is fabricated originally. Because of the flexibility of the product, a modification of the software enables the application in displays of other resolution. The research succeeds in inverting image, turning image upside down, and rotating image with 180 degrees, which guarantee the tiled screen project on circuit.LCDs take advantages of the digital character of DVI to adjust contrast automatically rather than manually. But it will lead to the decrease of color performance and the lost of detail information in dark part since the default contrast is high. What's more, the high environmental light contrast during daytime and night will make pilots fell dazzled at night. Therefore the contrast must be adjustable in modern aircraft. Concerning practical usage, manually regulation is also essential for people who have different demands for contrast ratio (even different contrast ratio in different region). Area divisible contrast adjustor is produced originally using the universal arithmetic.