High speed backplane and advanced color-patterning technologies for large area displays

该项目涉及显示行业的两个重要领域-有源矩阵有机发光二极管（AMOLED）显示面板和LED视频墙。克里斯蒂数字和滑铁卢大学（UW）正在合作开发，通过创新的方法，关键技术实现高品质，价格合理的AMOLED显示面板和先进的LED视频墙。对价格合理的高清晰度、大面积显示器的需求日益增长，对当前的AMOLED技术提出了挑战。主要的障碍是缺乏先进的晶体管技术来制造背板电子器件。多晶硅薄膜晶体管（TFTs）和氧化物薄膜晶体管（TFTs）等几种方法被积极地追求，但尚未找到可行的解决方案。基于他们最初的调查研究成果，克里斯蒂和华盛顿大学正在着手开发一种新技术，在一种新型陶瓷/硅混合平台上构建背板。通过在陶瓷基体中嵌入平面化单晶硅球来制造衬底，并构建高性能晶体管像素电路，该技术满足了衬底的性能和成本要求。这种背板技术也将直接有利于LED视频墙技术，目前主要用于无源矩阵寻址方案。背板的高性能晶体管为有源矩阵寻址提供所需的电流水平。AMOLED显示器的另一个重要挑战是彩色图案。目前的并排OLED图型或使用滤光片或变色介质的方法存在技术缺陷。本项目还将利用光子下移量子点（QD）开发一种高效的彩色模式方案。所提出的方案采用调谐到所需的窄发射带宽的量子点薄膜，不仅可以解决色彩管理方面的挑战，还可以消除目前OLED沉积中的一些限制。得益于申请人在材料、设备和电路领域的现有研究基础设施和专业知识，该项目将开发背板电子和彩色图案的制造就绪工艺，并展示先进的显示原型。

This project addresses two important sectors in the display industry - active matrix organic light emitting diode (AMOLED) display panels and LED video walls. Christie Digital and University of Waterloo (UW) are teaming up to develop, through innovative approaches, key technologies enabling high quality, affordable AMOLED display panels and advanced LED video walls. Increasing demand for high-definition, large area displays at affordable prices poses challenges to the current AMOLED technology. The principal barrier is the lack of superior transistor technology to build the backplane electronics. Several approaches such as polysilicon thin film transistors (TFTs) and oxide TFTs are actively pursued but a viable solution is yet to be found. Building on the outcome of their initial investigative research, Christie and UW are embarking on a new technology to build the backplanes on a novel ceramic/Si hybrid platform. By producing substrates with planarized, single-crystal Si spheres embedded in the ceramic host, and building high performance transistor pixel circuits, the proposed technology meets both the performance and cost requirements of the backplane. This backplane technology will also directly benefit the LED video wall technology, which is currently used mainly in passive matrix addressing schemes. The high performance transistors of the backplane deliver required current levels for active matrix addressing. Another important challenge for AMOLED displays is the color patterning. The current methods of side-by-side OLED patterning or use of filters or color changing media have technological drawbacks. This project will also develop an efficient color-patterning scheme by utilizing photon down-shifting quantum dots (QD). The proposed scheme that employs QD films tuned to desired, narrow emission, bandwidths will not only address the color management challenges but also removes some current restrictions in OLED deposition. Benefitting from existing research infrastructure and expertise of the applicants in the materials, devices, and circuits areas, this project will develop manufacture-ready processes for backplane electronics and color-patterning and demonstrate advanced display prototypes.