Fpga-based 3d Helmet Displays

Image Display is one of the important means for people to accept the external information. Stereoscopic Display can reproduce three-dimensional scene information, providing more comprehensive and detailed information and being widely used in medical, military, entertainment applications. But the 3D Stereoscopic Display is rather expensive. Because of this, the 3D Helmet Displays was studied which is based on SDRAM memory and FPGA processor and is designed so that the hardware and software systems have good images and very cheap prices. So it is a more practical system. There are three aspects of research in my dissertation:1. A 3D Head-Mounted Display scheme was designed which used FPGA processor and SDRAM memory structures based on Ping-pong operation. The scheme is different from the existing schemes based on MCU, DSP and other chips. It can change the resolution of 1024×768 into the resolution of 800×600 by Linear Interpolation Algorithm. The image of scheme can achieve 120HZ refresh rate. The scheme uses a high-speed SDRAM memory, and ping-pong operation which is different from switching videos on eyes to achieve three-dimensional image. In the scheme, videos is displayed on the right and left eye at the same time; no flicker effects is feeled and the eyestrain is reduced. This system can also achieve image contrast adjustment, LCD backlight adjustment (adjustable output pulse duty cycle), automatic identification of the source of three-dimensional images, as well as human-OSD function interface.2. The hardware platform of the system design and program design was finished. From the portability point of view, The PCB board space was tried to reduce and a detailed circuit diagram of the hardware design was gaven. The FPGA system design was finished which included the overall system analysis, implementation of the principles of each module to the specific method of implementation. And the MCU configuration design of AD9883 was finished.3. The work of testing and debugging was finished, including: the test of data acquisition, the test of data storage, the test of FPGA working status, the computer display as shown in-line debugging and HX7015A as shown by line debugging. And the debugging finally proved to be successful. The expected requirements are designed to meet successfully. Experiments and the analysis results demonstrated the successful system design and its usefulness.Through experiments and analysis, the results show that the 3D helmet display system which is mainly implemented by FPGA and SDRAM can achieve high-quality three-dimensional visual effects. So this low-cost 3D helmet display system can be use at the modernization of our country in the areas of need.