Large-area, flexible proximity-sensing surfaces are useful in a range of applications including process control, work security and robotics. However, current systems typically require rigid and thick electronics, which limit how they can be used. Here we report a flexible large-area proximity-sensing surface fabricated using printed organic materials and incorporating analogue front-end electronics in each pixel. The sensing surface is built with printed thin-film pyroelectric sensors based on poly(vinylidene fluoride-co-trifluoroethylene) co-polymers and printed organic thin-film transistors. A 5 × 10 matrix frontplane, consisting of long-wavelength infrared organic pyroelectric sensors, is laminated with an organic transistor analogue front-end backplane. The electronic front end provides sensor-signal amplification and pixel addressing to maximize the detection distance and reduce pixel crosstalk. An average yield of 82% fully working pixels for the backplane and a maximum system yield of 96%, which corresponds to 768 defect-free devices, are achieved. The system can detect a human hand approaching from different directions and track the position of a movable heat source up to a distance of around 0.4 m at a readout speed of 100 frames per second.

大面积、灵活的接近感应表面可用于一系列应用，包括过程控制、工作安全和机器人技术。然而，当前系统通常需要刚性和厚实的电子设备，这限制了它们的使用方式。在这里，我们报告了一种使用印刷有机材料制造的柔性大面积接近感应表面，并在每个像素中加入了模拟前端电子设备。传感表面由基于聚（偏二氟乙烯-三氟乙烯）共聚物和印刷有机薄膜晶体管的印刷薄膜热释电传感器构成。由长波长红外有机热释电传感器组成的 5 × 10 矩阵前板与有机晶体管模拟前端背板层压在一起。电子前端提供传感器信号放大和像素寻址，以最大限度地提高检测距离并减少像素串扰。实现了 82% 的背板完全工作像素的平均良率和 96% 的最大系统良率，这对应于 768 个无缺陷设备。该系统可以检测从不同方向接近的人手，并以每秒 100 帧的读取速度跟踪可移动热源的位置，距离可达 0.4 m 左右。