Head-mounted Display Circuit And Drive Design Based On LCoS Microdisplay And Inertial Sensor

With the development of display technology,people's demand for near-eye display technology is becoming more and more urgent.As a wearable near-eye display device,head-mounted display has become more and more widely used in military,education,medical,production and entertainment,and gradually becoming known to people.Traditional head-mounted displays often have disadvantages such as large size,multiple connection lines,low display resolution,monotonous color,and low functionality.Today's mainstream head-mounted displays have achieved significant improvements in some aspects,and it is difficult to meet the needs in specific environments.The main research work in this thesis is the LCoS micro-display drive control technology for head-mounted display and the head attitude detection technology based on inertial sensor.On these technology,a complete prototype of the head-mounted display circuit system was designed and developed.Firstly,the principle of LCoS display technology was discussed in this thesis.The advantages of LCoS display technology in brightness,power consumption and resolution was compared in detail.Based on LCoS micro-display,the hardware circuit design of micro-display module and video processing module was discussed.On the other hand,this thesis summarized and compared the characteristics of several head attitude detection methods.The small size,high precision and low computational complexity of the inertial method meet the design requirements of the head-mounted display.Then the thesis discussed the principle of inertial-based head attitude detection method and the basis of multi-sensor data fusion algorithm,and then completed the hardware circuit design and PCB design of the system inertia module.Then on the basis of the system hardware circuit design,this thesis discussed the overall drive design of the system,and then discussed the microcontroller drive design,micro-display drive design,video processor drive design,inertial sensor drive design.The input timing and startup timing of the LCoS microdisplay,the output timing and function configuration of the video processor were analyzed in detail,and the calibration problems of the gyroscope and the magnetometer were involved.Finally,the thesis carried out various tests on the specific implementation,the prototype of the head-mounted display above design,including power consumption test,USB virtual serial port data transmission and reception test,etc.The thesis emphatically analyzed the image quality of LCoS micro-display from both subjective and objective perspectives,and tested the accuracy and stability of the inertial method for detecting the attitude of the head from three aspects: real-time,stability and accuracy.Therefore,it comprehensively reflected the various indicators of the system designed in this thesis and verified the research work of this thesis.