Optical Data Transmission via Screen Display and Camera Capture
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Solution Overview
Problem
Current data transmission methods between terminals, such as Bluetooth and Wi-Fi, require additional communication modules, are prone to interference, and do not support point-to-point connections, making them inconvenient and inefficient.
Innovation Solution
A method and device that encode binary data into images displayed on a terminal's screen, allowing the receiving terminal to collect and decode these images to restore the original file, eliminating the need for extra communication modules and avoiding interference issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Bluetooth or Wi-Fi modules are added to terminals for data transmission, then data communication capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent uses the display screen as a copy medium to transmit data. Instead of adding communication modules, the transmitting terminal converts data into images displayed on its screen, and the receiving terminal captures these images using its built-in camera to recover the data. This approach leverages existing components (display screen and camera) to achieve data transmission without increasing device complexity.
2Adaptability or versatility
If Bluetooth or Wi-Fi modules are added to terminals for data transmission, then data communication capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent uses the display screen as a copy medium to transmit data. Instead of adding communication modules, the transmitting terminal converts data into images displayed on its screen, and the receiving terminal captures these images using its built-in camera to recover the data. This approach leverages existing components (display screen and camera) to achieve data transmission without increasing device complexity.
3Adaptability or versatility
If Bluetooth or Wi-Fi are used for data transmission, then data communication is enabled, but transmission reliability deteriorates due to electromagnetic interference
Solution Approach 1:
The patent replaces electromagnetic wave-based communication (Bluetooth, Wi-Fi) with an optical-based approach. Data is transmitted by displaying images on a screen and capturing them with a camera, using visible light instead of radio frequency electromagnetic waves. This substitution avoids interference from other electromagnetic devices operating in the ISM band, significantly improving transmission reliability.
4Adaptability or versatility
If Wi-Fi is used for data transmission, then network connectivity is improved, but ease of operation deteriorates due to AP connection requirements
Solution Approach 1:
The patent extracts the essential data transmission function from complex network protocols and AP connection requirements. By converting data into visual images that can be directly captured by a camera, it eliminates the need for AP connections, IP address configurations, and network protocol handshakes, dramatically simplifying the operation to just pointing and capturing.
Data Source
AI summary
The present invention discloses a data transmission method and device. The method comprises: a first terminal collecting image(s) displayed on a display screen of a second terminal through an image collecting module; wherein the image(s) is (or are) generated by encoding binary data of a file to be transmitted by the second terminal, and displayed on the display screen of the second terminal, and wherein a plurality of color gradations of pixels of the image(s) correspond to corresponding binary data; and the first terminal decoding the collected image(s) to obtain binary data and restoring the corresponding file according to the obtained binary data, thus achieving data transmission between terminals.