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首页> 外文期刊>Philosophical transactions of the Royal Society. Mathematical, physical, and engineering sciences >Gallium nitride micro-light-emitting diode structured light sources for multi-modal optical wireless communications systems
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Gallium nitride micro-light-emitting diode structured light sources for multi-modal optical wireless communications systems

机译：用于多模态光学无线通信系统的氮化镓微发光二极管结构光源

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摘要

Gallium nitride-based light-emitting diodes (LEDs) have revolutionized the lighting industry with their efficient generation of blue and green light. While broad-area (square millimetre) devices have become the dominant LED lighting technology, fabricating LEDs into micro-scale pixels (micro-LEDs) yields further advantages for optical wireless communications (OWC), and for the development of smart-lighting applications such as tracking and imaging. The smaller active areas of micro-LEDs result in high current density operation, providing high modulation bandwidths and increased optical power density. Fabricating micro-LEDs in array formats allows device layouts to be tailored for target applications and provides additional degrees of freedom for OWC systems. Temporal and spatial control is crucial to use the full potential of these micro-scale sources, and is achieved by bonding arrays to pitch-matched complementary metaloxide-semiconductor control electronics. These compact, integrated chips operate as digital-to-light converters, providing optical signals from digital inputs. Applying the devices as projection systems allows structured light patterns to be used for tracking and self-location, while simultaneously providing space-division multiple access communication links. The high-speed nature of micro-LED array devices, combined with spatial and temporal control, allows many modes of operation for OWC providing complex functionality with chip-scale devices.
机译：基于氮化镓的发光二极管（LED）彻底改变了照明工业，其有效地产生了蓝色和绿灯。虽然广域（方形毫米）器件已成为主导LED照明技术，但在微尺度像素（微LED）中制造LED，产生光学无线通信（OWC）的进一步优势，以及诸如智能照明应用的发展作为跟踪和成像。微LED的较小活动区域导致电流密度操作，提供高调制带宽和增加的光功率密度。以阵列格式制造微LED允许设备布局为目标应用程序定制，并为OWC系统提供额外的自由度。时间和空间控制对于使用这些微尺度源的全部电位至关重要，并且通过将阵列粘合到沥青匹配的互补金属氧化物半导体控制电子器件来实现。这些紧凑的集成芯片作为数字到光转换器，提供来自数字输入的光信号。应用设备作为投影系统允许用于跟踪和自我位置的结构化光图案，同时提供空间多次访问通信链路。微LED阵列设备的高速性质与空间和时间控制相结合，允许OWC提供具有芯片级设备的复杂功能的许多操作模式。

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