Free-Space Optical LED Link for 20 Gbps Wireless Video
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Solution Overview
Problem
Current wireless communication technologies, such as WLAN and radio transceivers, are unable to meet the high data throughput demands for uncompressed 4K and 8K UHD video transfer due to limitations in channel bandwidth, atmospheric absorption, and power consumption.
Innovation Solution
The development of ultra-wideband, free-space optical communication apparatus using visible and near-visible spectrum light emitting diodes (LEDs) and optical detectors, which enable high-speed wireless communication by leveraging the advantages of optical wireless links such as higher carrier frequencies and lower atmospheric absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If radio technologies (WLAN) are used for wireless communication, then wireless connectivity is provided, but data transfer speed is insufficient for uncompressed 4K and 8K UHD video
Solution Approach 1:
The patent replaces radio frequency electromagnetic wave transmission with optical transmission using visible and near-visible spectrum LEDs. This substitution enables data transfer rates exceeding 20 Gbps by leveraging the higher carrier frequencies of optical signals, directly resolving the throughput limitation of radio-based WLAN systems for uncompressed high-definition video
Solution Approach 2:
The patent changes the fundamental operating parameter from radio frequency (GHz range) to optical frequency (THz range) by using LEDs operating in the visible and near-visible spectrum. This parameter change enables significantly higher data transfer speeds and bandwidth capacity required for uncompressed 4K and 8K UHD video transmission
2Productivity
If wired connectivity (HDMI) is used to achieve high data transfer rates, then uncompressed video transfer is enabled, but device portability and wireless convenience are compromised
Solution Approach 1:
The patent substitutes physical cable connections with wireless optical transmission using LEDs and photodetectors. This eliminates the need for HDMI cables while achieving data transfer rates exceeding 20 Gbps, providing both wireless convenience and high-speed uncompressed video transmission capability
Solution Approach 2:
The patent creates a wireless communication system that can handle multiple functions including uncompressed video transmission, audio transmission, and data communication at speeds exceeding 20 Gbps, replacing multiple wired connections with a single wireless optical link
3Productivity
If millimeter-wave radio (802.11ad) is used to increase throughput, then wireless speed is improved, but atmospheric absorption and power consumption increase
Solution Approach 1:
The patent changes the transmission medium from millimeter-wave radio to visible/near-visible optical spectrum, operating at frequencies in the THz range. This parameter change reduces atmospheric absorption losses compared to millimeter-wave radio while enabling higher throughput through the available optical bandwidth
Solution Approach 2:
The patent replaces millimeter-wave radio transmission with optical transmission using LEDs and photodetectors. This substitution achieves higher data transfer rates while reducing the impact of atmospheric absorption and interference that limit millimeter-wave wireless systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution achieves data transfer rates exceeding 20 Gbps, significantly surpassing the capabilities of existing radio-based wireless communication systems, while reducing power consumption and increasing communication range.
Implementation Method 1
using visible and near visible spectrum light emitting diodes (LEDs)
Implementation Method 2
light emitting diodes (LEDs) configured to have a transient response time of less than 500 ps
Implementation Method 3
optical detectors configured to have a bandwidth of at least 10 gigahertz (GHz)
Data Source
AI summary
Devices, systems, and methods for providing wireless personal area networks (PANs) and local area networks (LANs) using visible and near-visible optical spectrum. Various constructions and material selections are provided herein. According to one embodiment, a free space optical (FSO) communication apparatus includes a digital data port, an array of light-emitting diodes (LEDs) each configured to have a transient response time of less than 500 picoseconds (ps), and current drive circuitry coupled between the digital data port and the array of LEDs.