| As a strong contender for the next generation of flat panel display,Organic light-emitting diode(OLED)is also named also named as electroluminescence device.The OLED technology develops very quickly because of its advantages,such as self-emission,full solid device,fast response,large viewing angle,wide-temperature operating range,and ultra-thin structure.In the flat panel display technology field it is one of the hot spot research at home and abroad.However,with people in order to enjoy a higher standard of living,the pursuit of high quality visual enjoyment,display device performance,such as resolution,brightness,power consumption and so on also increasingly unable to meet the demand.Therefore,the performance optimization of OLED display device is an irresistible trend.This paper carried out a series of exploratory and innovative work in optical performance optimize of FOLED devices,including:1.Using LightTools software to simulate the structure of OLED device.The comparison of color film and polarizing film of the OLED device through the influence,and reflectivity and the thickness of the device used for comparison,found that the thickness of color film instead of 1.8um polarizer,the transmission rate is 76%,the reflectivity is 7.65%.So that the screen brightness can be increased by nearly 50%,can reduce product power consumption,thereby enhancing the OLED life.At the same time,when the color film(5um)is used instead of polarizer,the thickness of the display device is decreased by 110um,which can improve the bending resistance of the flexible display device.The reflectivity reduction is achieved by employing a layer 70%transmittance low pass film.Experiments show that the color film with low transmittance of the film through the comprehensive rate of 53%,compared with the polarizing film transmittance(44.5%)increased by 19%,while the color film internal reflectance decreased from 3.65%to 2.6%to reduce its influence on device performance,achieved good results.2.By comparing the five layer structure of SiNx/SiNC/SiNx/SiNC/SiNx and SiNx/IJP/SiNx three layer structure of thin film encapsulation(Thin Film Encapsulation),can be found in the same package film thickness,three layer structure of the TFE package is better than the TFE package of five layer structure.And the thickness of polymer acrylic material IJP is negatively related to the angle of view.According to the capacity requirement of IJP coated impurity particles,the actual thickness of IJP is 8um.3.Through the discussion of different color optimization scheme,we choose the SiNx 233nm/IJP 8um/SiCN 179nm scheme,the red light at 0 degrees-60 degrees with the increase of transmission direction angle increases rapidly,which can compensate the perspective direction of red chroma attenuation of green light between 0 DEG?30 DEG transmittance decreased slowly,30 degrees after the start reduce rapidly,meet the initial expected standards,at the same time,0 degrees?70 degrees in the blue light has remained stable trend,the brightness attenuation ratio is guaranteed.Compared with the ideal scheme,it can better match the trend of RGB brightness and color purity.4.The rate of transmittance,reflectance and the influence of the angle of view,we found through the analysis of the opening,the opening rate and transmission rate showed a positive correlation linear relationship between reflectivity with increasing opening rate and exponentially increased,growth rate far exceeds its influence on transmittance,and the perspective although there appears to be a linear growth trend,but only 3 degrees the improvement effect is not prominent.Therefore,the proportion of reflectivity is larger.In this paper,by sacrificing some opening rate,narrowing the opening rate to the size of the light emitting device 70%,can be realized by enhancing the rate of 19%(from 44.5%to 53%),the reflectance is controlled within 6%(5.42%),the effect of low permeable membrane solution is more outstanding. |
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