The Design And Circuit Realization Of A Driving Method For A Small-size High-resolution Display Chip

In the era of rapid development of intelligence and miniaturization,microdisplay technology has been integrated into the lives of modern people.Mixed reality(MR),virtual reality(VR),and augmented reality(AR)will have a huge application market and space in the future,But applications such as AR/VR/MR have high requirements for microdisplay technology.It is necessary to achieve high resolution,low power consumption,low latency,small size,and other application characteristics on a microdisplay system at the same time,especially to take into account With high resolution and small size,there are still many difficulties and bottlenecks in the current micro-display system to consider these advantages.In response to the above-mentioned problems,this paper studies the existing technology that chooses to start with the driver chip in the microdisplay system and proposes a drive method based on dynamic sub-pixel fusion based on the basic characteristics of human eye recognition and liquid crystal display.It is suitable for the current popular LCo S,Micro-LED,OLED,and other different microdisplay technologies.The basic principle of its realization is that the input high-resolution video image is split into low-resolution video images,and the sub-pixels are dynamically fused without storage so that a sub-pixel point after fusion contains multiple sub-pixels.Information of two adjacent sub-pixels,that is,a light-emitting diode participates in the imaging of multiple adjacent pixels so that the low-resolution micro-display can display high-resolution video images,which improves the display resolution without storing image data.Save a lot of storage resources,thereby reducing the size and area of the driver chip.This article carries on the progressive design and realization according to the complete ASIC development procedure,has proved that this kind of driving method based on dynamic sub-pixel fusion can realize the small size and high-resolution micro-display system step by step.Starting from the algorithm and circuit design,a Matlab verification model is established to simulate dynamic sub-pixel fusion.Based on proving that the processing method can improve the display effect,a driving scheme is designed for the method,and the project function modules are divided according to the driving scheme.The hardware description language Verilog carries on the circuit design to each module.After completing RTL-level code writing,perform FPGA prototype verification,and perform co-simulation with Model Sim on Vivado,that is,functional verification.After functional verification is correct,use Xilinx Artix-7 series FPGA development board as a driver to light up LCo S and OLED with a resolution of 960x540 Microdisplay screen,the results show that when the driving method is applied to FPGA implementation,it saves 74% of the storage resources in the FPGA,and at the same time shows the display effect of 1920x1080 resolution,which increases the display resolution of the microdisplay screen by 4 times.Transplant the engineering code to the ASIC environment,use NC-Verilog for functional simulation,and use the logic synthesis tool Design Compiler to output the RTL code as a gate-level netlist based on the process library,and check the generated area and timing analysis report,netlist After handing over to the back-end P&R,comprehensive verification at the feet of the three processes will be carried out.The area report after logic synthesis shows that the chip area has been reduced from 18019946.22?m2 to 1270128.04?m2,that is,the application of this driving method to the ASIC driver chip can reduce the chip area by about 93%,thereby realizing a small-size and high-resolution microdisplay system.