Display Screen Optical Data Transmission for Secure Li-Fi
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Solution Overview
Problem
Current data transmission technologies, particularly in terminal devices, face challenges in achieving fast and secure data transfer using Light Fidelity (Li-Fi) technology.
Innovation Solution
A data transmission system utilizing a display screen with determined transmitting regions, where each region corresponds to sub-pixels, controls the display grayscale to transmit data via optical signals in machine language, ensuring secure and high-speed data transfer by converting data into binary or denary formats based on light-emitting states or grayscales, and a data receiving device with optical sensors receives these signals to decode the data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted using traditional wireless technologies, then data transmission can be achieved, but security is compromised due to ease of interception
Solution Approach 1:
The patent replaces traditional electromagnetic wave-based wireless transmission with optical signal transmission through display screen light emission. This substitution of transmission medium fundamentally changes the physical layer of communication, enabling secure data transfer because optical signals from display screens are directional and difficult to intercept compared to omnidirectional radio waves.
2Reliability
If display screen regions are used for data transmission, then security is improved, but transmission speed may be limited by display refresh rates
Solution Approach 1:
The patent divides the display screen into multiple independently controllable regions or pixels, where each pixel can transmit data bits independently. This segmentation allows parallel transmission of multiple data streams simultaneously, effectively multiplying the transmission rate while maintaining the security benefits of optical transmission.
Solution Approach 2:
The patent utilizes the periodic refresh cycles of the display screen to encode and transmit data at multiple frequency levels. By modulating light intensity or color at different refresh rates and combining multiple refresh cycle patterns, the system achieves higher effective transmission rates beyond the basic display refresh frequency.
3Reliability
If optical signals are used for data transmission, then security is enhanced, but the complexity of encoding and decoding increases
Solution Approach 1:
The patent leverages the existing display screen technology, which is already universally present in modern devices, to perform both visual display and data transmission functions simultaneously. The same pixel hardware that displays images also modulates light for optical communication, eliminating the need for separate dedicated transmission components and reducing overall system complexity.
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
The system enables secure and fast data transmission as optical signals are difficult to capture from other directions, achieving high security and high transmission rates, suitable for devices like mobile phones and tablets.
Implementation Method 1
transmitting module 13, configured to transmit, by controlling the one or more transmitting regions 111, target data in a format of a machine language via optical signals
Implementation Method 2
the transmitting module 13 is configured to transmit, by controlling a display grayscale of each sub-pixel of the one or more transmitting regions 111, the target data in the format of the machine language via the optical signals
Implementation Method 3
a receiving module 23, configured to receive, through each optical sensor 211 of the one or more receiving regions 212, target data in a format of a machine language transmitted via optical signals
Data Source
AI summary
A data transmitting method, a data receiving method and the related device and system are provided. The data transmitting device includes a display screen, a first determination module, configured to determine one or more transmitting regions of the display screen, and a transmitting module, configured to transmit, by controlling a display of the one or more transmitting regions, target data in a format of a machine language via optical signals. The data receiving device includes a panel on which a plurality of optical sensors is arranged, a second determination module, configured to determine one or more receiving regions of the panel each corresponding to one or more of the optical sensor, and a receiving module, configured to receive, through each optical sensor in the one or more receiving regions, target data in a format of a machine language transmitted via optical signals.