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Advanced Poly-LED Displays

机译:先进的LED显示屏

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摘要

Philips have been actively developing polymer OLED (poly-LED) displays as a future display technology. Their emissive nature leads to a very attractive visual appearance, with wide viewing angle, high brightness and fast response speed. Whilst the first generation of poly-LED displays are likely to be passive-matrix driven, power reduction and resolution increase will lead to the use of active-matrix poly-LED displays. Philips Research have designed, fabricated and characterized five different designs of active-matrix polymer-LED display. Each of the five displays makes use of a distinct pixel programming- or pixel drive-technique, including current programming, threshold voltage measurement and photodiode feedback. It will be shown that the simplest voltage-programmed current-source pixel suffers from potentially unacceptable brightness non-uniformity, and that advanced pixel circuits can provide a solution to this. Optical-feedback pixel circuits will be discussed, showing that they can be used to improve uniformity and compensate for image burn-in due to polymer-LED material degradation, improving display lifetime. Philips research has also been active in developing technologies required to implement poly-LED displays on flexible substrates, including materials, processing and testing methods. The fabrication of flexible passive-matrix poly-LED displays will be presented, as well as the ongoing work to assess the suitability of processing flexible next-generation poly-LED displays.
机译:飞利浦一直在积极开发聚合物OLED(poly-LED)显示器,作为未来的显示技术。它们的发射性质导致非常吸引人的视觉外观,具有宽视角,高亮度和快速响应速度。尽管第一代poly-LED显示器很可能是被动矩阵驱动的,但功率降低和分辨率提高将导致有源矩阵poly-LED显示器的使用。飞利浦研究中心已设计,制造和表征了五种不同的有源矩阵聚合物LED显示器设计。五个显示器中的每一个都使用独特的像素编程或像素驱动技术,包括电流编程,阈值电压测量和光电二极管反馈。将显示最简单的电压编程电流源像素遭受潜在的不可接受的亮度不均匀的困扰,并且高级像素电路可以为此提供解决方案。将讨论光学反馈像素电路,显示它们可用于提高均匀性并补偿由于聚合物LED材料退化而引起的图像烙印,从而改善显示寿命。飞利浦的研究还活跃于开发在柔性基板上实现多LED显示器所需的技术,包括材料,工艺和测试方法。将介绍柔性无源矩阵多LED显示器的制造,以及正在进行的评估处理柔性下一代多LED显示器的适用性的工作。

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