共查询到19条相似文献,搜索用时 125 毫秒
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有机电致发光二极管(Organic Light Emitting Diode,OLED)在显示技术中得到越来越广泛的应用,特别是AMOLED已经成为新一代显示技术发展方向,但是一系列影响AMOLED显示质量和寿命的问题需要得到解决。其中,AMOLED的驱动TFT的阈值电压偏移严重影响了AMOLED的性能。该文综述了当前几种典型的AMOLED的像素驱动结构及其驱动TFT阈值电压的补偿方法,并详细介绍其补偿原理。 相似文献
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本文对近期平板显示市场的一些变化,如液晶的大幅降价对PMOLED(被动式OLED)的冲击,AMOLED(主动式OLED)的最新变化及技术趋势进行了概括分析. 相似文献
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近日,三星电子和LGD同时宣布将在年初的美国国际消费电子展览会(CES)上推出55英寸有机发光二极管(0LED)电视,并计划在2012年启动8.5代生产线用于大尺寸OLED面板的生产,这似乎宣告OLED时代已经来临。为了在新一代显示技术竞争中赢得话语权,日立、索尼和东芝成立合资公司致力于AMOLED高阶技术的研发,中国企业也不断加快 相似文献
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彭俊彪教授是我国较早从事显示器件研究的科学家,2003年主持了高分子发光平板显示器件技术研究,2008年开始OLED显示驱动材料研发,2013年研制成功国内第一块稀土掺杂氧化物TFT的AMOLED柔性全彩高清显示器件. 相似文献
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宽色域TV型AMOLED显示器的系统设计 总被引:1,自引:0,他引:1
利用目前的技术,可以设计和制造出极具竞争力的TV型AMOLED显示器。在本文中,将详述系统设计需考虑的事项,如器件结构的选择(包括叠层式白色OLED发光装置)、具有TFT衰退补偿的底板技术[非晶硅(a—Si)底板]以及组件设计(针对长寿命、低成本而言)。这种结构的AMOLED显示器能够满足性能和寿命的要求,制造成本极具竞争力。采用一种一字型OLED沉淀机所制做的14英寸AMOLED显示器显示了此类性能。这种所选择的OLED技术适合于大尺寸的玻璃基板,可与目前的a—Si底板制造设备兼容。 相似文献
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本文考查了具有a-Si TFT及LTPS TFT固有性能之OLED底板的性能。LTPS TFT显示了其在AMOLED显示应用巾之令人满意的稳定性,而a—Si AMOLED则表现出在驱动OLED方面具有更好的均匀能力。但是a—Si TFT在长期工作中的稳定性是令人难以接受的,并且尚有使a—SiTFT AMOLED商品化的关键问题需要解决。 相似文献
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KeeChan Park Jae-Hong Jeon YoungIl Kim Jae Beom Choi Young-Jin Chang ZhiFeng Zhan ChiWoo Kim 《Solid-state electronics》2008,52(11):1691-1693
An active-matrix organic light-emitting diode (AMOLED) display based on the polycrystalline silicon backplane technology has been fabricated that employs a new pixel circuit to compensate for the variation in the threshold voltage of the thin film transistors (TFT). The new pixel circuit also copes with the voltage drop in the supply line and a very high contrast ratio can be achieved. The uniformity of the new AMOLED display is remarkably improved compared with the basic two-TFT pixel structure, and it can be readily applied in the mass production of commercial AMOLED displays. 相似文献
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《Microelectronics Journal》2015,46(10):923-927
In this paper, pixel circuit using mirroring structure with Indium–Gallium–Zinc oxide (IGZO) thin film transistors (TFTs) for active matrix organic light emitting diode (AMOLED) display is proposed. This pixel circuit consists of only four TFTs, and one capacitor. Due to the mirroring structure, characteristic of the driving TFT can be precisely sensed by the sensing TFT, which is deployed in a discharging path for gate electrode of the driving TFT. This discharging process is strongly dependent on threshold voltage (VT) and effective mobility of the sensing TFT. Circuit operating details are discussed, and compensation effects for threshold voltage shift and mobility variations are verified through numerical derivation and SPICE simulations. Furthermore, compared with conventional schematics, the proposed pixel circuit might have much simplified external driving circuits, and it is a promising alternative solution of high performance AMOLED display. 相似文献
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In this paper, we examine the effect of switch thin-film transistor (TFT) leakage and charge injection on the operation and driving of amorphous silicon (a-Si) active matrix organic light-emitting diode (AMOLED) displays. Charge injection causes an undesirable and immediate drop in the data voltage stored on the storage capacitor CS when the switch TFT is turned off, and the leakage of the switch TFT causes the charge on CS to gradually leak out over the frame time. While making the row line negative helps reduce the leakage, it increases the voltage swing on the row line and causes more charge injection. We have demonstrated that for a given V/sub DD/, there is an optimal negative gate drive voltage on the switch TFT that minimizes the overall drop in data voltage on CS over the frame time. In addition, we have also shown that even though this optimal driving point changes with aging of the display since both leakage and V/sub T/ increase over time, it is possible to keep the voltage drop on C/sub S/ constant irrespective of aging. The analysis provides the designer with a means to improve the long term grey-scale performance of the AMOLED display. 相似文献
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为了在TFT工厂的设计、建设及运营阶段采取有针对性的节能降耗措施,有效降低器件制备过程中的能耗,本文根据我院多年从事TFT生产线节能评估工作的经验数据,针对不同技术路线,选取具有代表性的TFT-LCD及AMOLED生产线,并对其能耗进行对比分析,以讨论不同技术路线对TFT-LCD及AMOLED显示器件生产能耗的影响。分析结果表明:阵列制备是最主要用能工序,其制备复杂程度可采用光罩次数(Mask)表征。随着光罩次数的增加,器件制造对电力、氮气、新鲜水等能源及耗能工质的需求呈急剧增长:采用10-13Mask技术的LTPS及AMOLED显示器件,其综合能耗达到a-Si及Oxide技术路线的约350%之多;在不同技术路线下,电力均为最主要的用能需求,其消耗量占总能耗的80%~87%。能耗的增加导致用能成本的大幅上升。在国家大力提倡绿色经济的环境下,建议各大厂商采取科学有效的能耗管控措施,以降低能源消耗及用能成本,实现产业的健康可持续发展。 相似文献
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Soeren Steudel Kris Myny Sarah Schols Peter Vicca Steve Smout Ashutosh Tripathi Bas van der Putten Jan-Laurens van der Steen Martin van Neer Falk Schütze Olaf R. Hild Erik van Veenendaal Pieter van Lieshout Marcel van Mil Jan Genoe Gerwin Gelinck Paul Heremans 《Organic Electronics》2012,13(9):1729-1735
We present a QQVGA top emitting monochrome AMOLED display with 85dpi resolution using an organic TFT backplane on low temperature PEN-foil. The backplane process flow is based on a 7 layer photolithography process that yields a final mobility of the OTFT of ~0.4 cm2/Vs. The aperture ratio of the top-emitting OLEDs is over 75%. For operation at 10 V supply voltage (VDD), the brightness of the display using red and green OLEDs exceeds 200 cd/m2. 相似文献
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图形化蓝宝石衬底(PSS)工艺在改善GaN晶体外延生长质量以及提升LED器件发光提取效率方面作用显著,并被LED行业大量采用。针对高亮度LED量产线大量采用二手投影光刻机制备PSS衬底所面临的焦深不足、垂向控制容易离焦,以及运动台拼接精度不足等问题导致的PSS良率仅有70%~80%的现象,有针对性地在新研制的高亮度LED光刻机中采用最佳线宽/焦深选择技术、无缝拼接技术、Mapping垂向控制技术,使PSS的制造良率达到95%以上,极大地降低了PSS制造返工成本。同时,针对芯片细电极曝光需求,采用精密机器视觉对准技术,实现了芯片电极层1μm线宽下200 nm套刻精度。 相似文献