基于双帧数模融合扫描的硅基有机发光二极管微显示器
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摘要
提出了一种双帧数模融合扫描策略,优化了数字脉宽调制部分。设计了一种硅基有机发光二极管(OLED)微显示器驱动电路,该电路包括像素驱动电路,在帧频为60Hz、灰度等级为256、分辨率为1920pixel×3pixel×1080pixel的条件下,扫描效率可达99.22%,数据传输频率降低至23.328 MHz。结果表明,该像素驱动电路可有效减少漏电流,保证灰度精度,降低最小电流,并提高硅基OLED微显示器的对比度。
A double-frame digital-analog-hybrid scanning strategy is proposed,and the part of digital pulse width modulation is optimized.The driving circuit of an organic-light-emitting-diode(OLED)-on-silicon microdisplay is designed,which includes the pixel driving circuit.The scanning efficiency can reach 99.22% and the data transmission frequency can be reduced to 23.328 MHz under the conditions of frame rate of 60 Hz,gray level of256,and resolution of 1920 pixel×3 pixel×1080 pixel.The results show that this pixel driving circuit can effectively reduce the leakage current,guarantee the gray precision,reduce the minimum current,and improve the contrast of the OLED-on-silicon microdisplay.
A double-frame digital-analog-hybrid scanning strategy is proposed,and the part of digital pulse width modulation is optimized.The driving circuit of an organic-light-emitting-diode(OLED)-on-silicon microdisplay is designed,which includes the pixel driving circuit.The scanning efficiency can reach 99.22% and the data transmission frequency can be reduced to 23.328 MHz under the conditions of frame rate of 60 Hz,gray level of256,and resolution of 1920 pixel×3 pixel×1080 pixel.The results show that this pixel driving circuit can effectively reduce the leakage current,guarantee the gray precision,reduce the minimum current,and improve the contrast of the OLED-on-silicon microdisplay.
引文
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[4] Wang S M,Cheng D W,Huang Y F,et al.Design of wide FOV optical-tiled head-mounted display with high-resolution[J]. Laser&Optoelectronics Progress,2018,55(6):062201.王士铭,程德文,黄一帆,等.大视场高分辨率光学拼接头盔显示器的设计[J].激光与光电子学进展,2018,55(6):062201.
[5] Ji Y,Wang C Q,Chen W D,et al.An atom scan strategy for OLED micro display[J].Optics and Precision Engineering,2018,26(4):998-1005.季渊,王成其,陈文栋,等.OLED微显示器的原子扫描策略[J].光学精密工程,2018,26(4):998-1005.
[6] Man L P,Ji Y,Chu Y N,et al.Digital and analog hybrid scan strategy for high definition microdisplay on silicon[J].Laser&Optoelectronics Progress,2018,55(1):012301.满丽萍,季渊,褚勇男,等.高清硅基微显示数模融合扫描策略[J].激光与光电子学进展,2018,55(1):012301.
[7] Onoyama Y, Yamashita J, Kitagawa H,et al.70.4L:late-news paper:0.5inch XGA micro-OLED display on a silicon backplane with high-definition technologies[J].SID Symposium Digest of Technical Papers,2012,43(1):950-953.
[8] Kwak B C,Kwon O K.A 2822ppi resolution pixel circuit with high luminance uniformity for OLED microdisplays[J].Journal of Display Technology,2016,12(10):1083-1088.
[9] Zhao B H,Huang R,Ma F,et al.The realization of an SVGA OLED-on-silicon microdisplay driving circuit[J].Journal of Semiconductors,2012,33(3):035006.
[10] Kimura K,Onoyama Y,Tanaka T,et al.28-3:distinguished paper:new pixel driving circuit using self-discharging compensation method for highresolution OLED microdisplays on a silicon backplane[J].SID Symposium Digest of Technical Papers,2017,48(1):398-402.
[11] Hong S W,Kwak B C,Na J S,et al.Simple pixel circuits for high resolution and high image quality organic light emitting diode-on-silicon microdisplays with wide data voltage range[J].Journal of the Society for Information Display,2016,24(2):110-116.
[12] Chen Z J,Xu M H,Ran F.IP core implementation of fractal scanning model for FPD system[J].Acta Electronica Sinica,2008,36(5):880-885.陈章进,徐美华,冉峰.平板显示系统分形扫描模型的IP核实现[J].电子学报,2008,36(5):880-885.
[13] Yang M,Zhang B X,Chen J J,et al.A new pixel circuit for high-contrastratioOLED-on-silicon microdisplay[J].Research&Progress of Solid State Electronics,2015,35(3):267-271,283.杨淼,张白雪,陈建军,等.一种提高硅基OLED微显示器对比度的像素电路[J].固体电子学研究与进展,2015,35(3):267-271,283.