There are various proposals for employing grass materials as a green landscape-friendly display. However, it is difficult for current techniques to display smooth animations using 8-bit images and to adjust display resolution, similar to conventional displays. We present ProgrammableGrass, an artificial grass display with scalable resolution, capable of swiftly controlling grass color at 8-bit levels. This grass display can control grass colors linearly at the 8-bit level, similar to an LCD display, and can also display not only 8-bit-based images but also videos. This display enables pixel-by-pixel color transitions from yellow to green using fixed-length yellow and adjustable-length green grass. We designed a grass module that can be connected to other modules. Utilizing a proportional derivative control, the grass colors are manipulated to display animations at approximately 10 [fps]. Since the relationship between grass lengths and colors is nonlinear, we developed a calibration system for ProgrammableGrass. We revealed that this calibration system allows ProgrammableGrass to linearly control grass colors at 8-bit levels through experiments under multiple conditions. Lastly, we demonstrate ProgrammableGrass to show smooth animations with 8-bit grayscale images. Moreover, we show several application examples to illustrate the potential of ProgrammableGrass. With the advancement of this technology, users will be able to treat grass as a green-based interactive display device.

翻译：已有多种研究提出利用草地材料作为绿色景观友好型显示器。然而，现有技术难以像传统显示器那样通过8位图像显示流畅动画，也难以调节显示分辨率。我们提出可编程草（ProgrammableGrass），一种分辨率可扩展的人工草地显示器，能够以8位精度快速控制草地颜色。该草地显示器可像LCD显示器一样线性控制8位级草地颜色，不仅能显示基于8位的图像，还能呈现视频。通过使用固定长度的黄色草与可调节长度的绿色草，该显示器实现了从黄到绿的逐像素颜色过渡。我们设计了一种可与其他模块连接的草地模块，利用比例-微分控制，以约10帧/秒的帧率操控草地颜色以显示动画。由于草地长度与颜色间存在非线性关系，我们为可编程草开发了一套校准系统。通过多条件实验证明，该校准系统使可编程草能够以8位级线性控制草地颜色。最后，我们展示可编程草使用8位灰度图像显示流畅动画的效果，并通过多个应用示例说明其潜力。随着该技术的进步，用户将能把草地视为基于绿色的交互式显示设备。