An Artificial Flexible Visual Memory System Based on an UV-Motivated Memristor
An Artificial Flexible Visual Memory System Based on an UV-Motivated Memristor
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基于紫外线激励忆阻器的人工柔性视觉记忆系统
DOI：
10.1002/adma.201705400
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发表时间：
2018-02-15
影响因子：
29.4
通讯作者：
Shen, Guozhen
中科院分区：
文献类型：
--
作者：
Chen, Shuai;Lou, Zheng;Shen, Guozhen
对于人类视觉记忆的模仿，一个突出的挑战是如何通过电子设备检测和存储图像信息，这需要一个多功能的集成，像眼睛一样感知光，像大脑一样记忆图像信息，将光信号转化为电子设备可以识别的电信号。虽然目前的图像传感器可以实时感知简单的图像，但当外部图像刺激被去除时，图像信息就会消失。图像传感器与视觉记忆系统之间的不足激发了图像传感器与记忆器件的逻辑集成，以实现对光信息的感知和记忆过程，为人类视觉记忆的仿生设计提供依据。因此，设计了一种简单的结构，利用紫外光激发的记忆电阻器来构建人工柔性视觉记忆系统。视觉记忆阵列可以实现具有图案图像的紫外光分布的检测和记忆过程，并可以长期保留，存储的图像信息可以通过负电压扫描重置并重新编程为相同或其他图像分布，证明了有效的可重用性。这些结果为模拟人类视觉记忆提供了新的机会，并使柔性视觉记忆器件在未来可穿戴电子产品、电子眼、多功能机器人和视觉障碍辅助设备中得到应用。
For the mimicry of human visual memory, a prominent challenge is how to detect and store the image information by electronic devices, which demands a multifunctional integration to sense light like eyes and to memorize image information like the brain by transforming optical signals to electrical signals that can be recognized by electronic devices. Although current image sensors can perceive simple images in real time, the image information fades away when the external image stimuli are removed. The deficiency between the state-of-the-art image sensors and visual memory system inspires the logical integration of image sensors and memory devices to realize the sensing and memory process toward light information for the bionic design of human visual memory. Hence, a facile architecture is designed to construct artificial flexible visual memory system by employing an UV-motivated memristor. The visual memory arrays can realize the detection and memory process of UV light distribution with a patterned image for a long-term retention and the stored image information can be reset by a negative voltage sweep and reprogrammed to the same or an other image distribution, which proves the effective reusability. These results provide new opportunities for the mimicry of human visual memory and enable the flexible visual memory device to be applied in future wearable electronics, electronic eyes, multifunctional robotics, and auxiliary equipment for visual handicapped.