Design Of Driving And Controlling Circuits With High Luminance For OLED On Silicon

Organic light-emitting diode(OLED)on silicon display devices have been widely used in AR/VR devices and military helmet display system due to their features of high definition,high resolution,light weight,fast response,high contrast,wide viewing angles and low power consumption.In order to improve the brightness performance and optimize the display effect of the high-brightness OLED on silicon microdisplay in a wide temperature range(-50??70?),this paper is based on a 0.96 inch high-brightness OLED on silicon microdisplay bare screen with a resolution of 1280×1024,and studies and designs its peripheral driving and controlling circuit.In order to improve the brightness attenuation of microdisplay in low temperature environment,real time collecting temperature value and adjusting common cathode driving voltage were adopted.The closed-loop control method is used to improve the brightness fluctuation of the microdisplay screen in high temperature environment and in the high luminance state by compensating the luminance value with the temperature difference.After experimental verification,the display luminance in low environment from10%of the luminance at normal temperature,increased to 100%,under high temperature environment and high luminance state,brightness fluctuation from 30%to 13.8%,improve the microdisplay brightness performance in a wide temperature range.This thesis studies the OLED on silicon micro display technology and designs the peripheral driving and controlling circuit of the OLED on silicon microdisplay.LVDS signal is selected,and the mode of frequency partition-even signal transmission is used to improve the transmission efficiency and anti-interference ability of the video signal;Using nonlinear curve to correct video signal to adapt to human visual perception;The peripheral driving circuit scheme and OLED pixel driving circuit scheme were designed to enhance the line brightness.The luminance regulation technology of OLED on silicon is analyzed and applied in this design.By comparing the three ways of heating film,heating glass cover plate and programming the drive voltage of common cathode,the best scheme to improve the brightness attenuation of micro display screen at low temperature was determined.By optimizing logic algorithm and hardware circuit,the brightness of the micro display screen can fluctuate greatly in high temperature environment and high luminance state.The power consumption and weight of the driving and controlling circuit board are optimized.Finally,a method to improve the service life of microdisplay is proposed.The FPGA logic and hardware circuit designed in this paper have been optimized and improved for repeatedly,and three versions of the physical circuit board have been produced.In order to verify the effect of the circuit on improving the performance of the microdisplay,several rounds of repeated experiments have been carried out.The experimental results show that the maximum display luminance of the high-brightness OLED on silicon microdisplay can reach 21562cd/m²,the minimum luminance can be optimized to 0.472cd/m²,the contrast ratio is greater than 50000:1,LT₉₅?600h,and the maximum power consumption of the 100%window is 1.8W.