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

适用于大面积显示器的高速背板和先进的彩色图案技术

• 批准号: 508628-2016
• 负责人: SIVOTHTHAMAN, SIVA
• 金额: $ 9.47万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=665357
• 关键词: speed; backplane; advanced; color; patterning

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.

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。科视Christie Digital和滑铁卢大学（UW）正在合作，通过创新方法开发关键技术，实现高质量、经济实惠的AMOLED显示屏和先进的LED视频墙。对价格合理的高清晰度大面积显示器的需求不断增长，对当前的AMOLED技术提出了挑战。主要的障碍是缺乏上级晶体管技术来构建背板电子设备。目前正积极探索多晶硅薄膜晶体管（TFT）和氧化物TFT等多种方法，但尚未找到可行的解决方案。基于初步研究成果，科视Christie和UW正在着手开发一种新技术，在新型陶瓷/硅混合平台上构建背板。通过生产具有嵌入陶瓷基质中的平坦化的单晶Si球的基板，并构建高性能晶体管像素电路，所提出的技术满足背板的性能和成本要求。这种背板技术也将直接有利于LED显示墙技术，目前主要用于无源矩阵寻址方案。背板的高性能晶体管可提供有源矩阵寻址所需的电流水平。AMOLED显示器的另一个重要挑战是颜色图案。并排OLED图案化或使用滤光器或颜色改变介质的当前方法具有技术缺陷。该项目还将利用光子下移量子点（QD）开发一种有效的颜色图案化方案。所提出的采用调谐到所需的窄发射带宽的QD膜的方案不仅将解决颜色管理挑战，而且还消除了OLED沉积中的一些电流限制。受益于现有的研究基础设施和申请人在材料，器件和电路领域的专业知识，该项目将开发背板电子和彩色图案的可编程工艺，并展示先进的显示原型。