Display Backlight Wireless Data Transmission via Optical Modulation
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Solution Overview
Problem
Existing data transmission methods, both wired and wireless, require significant modifications to hardware structures and incur high costs, and wireless methods face challenges with antenna placement limitations and compatibility issues, making them difficult to implement in existing devices without altering their hardware.
Innovation Solution
A system and method utilizing a display backlight for wireless data transmission through Variable Pulse Period Modulation and Different Pulses in Fixed Period Modulation, allowing data to be transmitted via light and dark signals without altering the device's hardware structure, using a display backlight to modulate and demodulate data using optical-electrical conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired data transmission methods (Modbus, CAN bus, USB, Ethernet) are used, then data transmission reliability is improved, but device structure complexity and system cost increase significantly
Solution Approach 1:
The patent replaces wired mechanical connections with optical signal transmission through display backlight modulation. The transmitter modulates the display backlight to encode data, which is then detected optically by a receiver, eliminating the need for physical wired connections and associated hardware infrastructure.
Solution Approach 2:
The display backlight serves dual functions: it provides illumination for the display while simultaneously acting as a data transmission medium. This multi-functionality eliminates the need for separate communication hardware, reducing device structure complexity while maintaining data transmission capability.
2Device complexity
If wireless data transmission methods (WIFI, Bluetooth, NFC) are used, then device structure modification is reduced, but antenna placement limitations and EMI/EMC design difficulty increase
Solution Approach 1:
The patent substitutes traditional wireless electromagnetic antenna systems with optical signal transmission through display backlight. This eliminates antenna placement constraints and EMI/EMC design challenges associated with radio frequency antennas, while maintaining wireless data transmission functionality.
3Device complexity
If optical image method (displaying two-dimensional codes) is used, then hardware structure modification is avoided, but display performance requirements (contrast, pixel density) increase and original display content is occupied
Solution Approach 1:
The patent utilizes the display backlight's inherent illumination function to simultaneously perform data transmission. The backlight modulation occurs at frequencies imperceptible to humans, allowing the display to serve its primary illumination purpose while concurrently transmitting data through optical modulation, eliminating the need for separate two-dimensional code display areas.
4Productivity
If existing devices are modified to support new data transmission methods, then data transmission functionality is improved, but device compatibility and user convenience decrease due to hardware replacement requirements
Solution Approach 1:
The patent enables existing displays to perform both illumination and wireless data transmission functions through backlight modulation. Since the display hardware remains unchanged and continues to provide its primary illumination function, existing devices maintain full compatibility while gaining new data transmission capabilities.
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
Enables wireless data transmission without modifying the original hardware, reducing costs and compatibility issues, while providing a convenient and efficient means for data reading and management, and allowing seamless integration with existing devices.
Implementation Method 1
a display backlight member configured to output a sequence of light and dark signals, driven by the backlight driving pulse signal
Implementation Method 2
an optical probe configured to receive a sequence of light and dark signals transmitted with the display backlight and optical-electrical convert the sequence of light and dark signals
Data Source
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AI summary
The present disclosure provides an apparatus, a system and a method for wireless data transmission by using display backlight. The apparatus for transmitting wireless data by using display backlight according to the present disclosure includes: a data storage unit (202) for storing data to be transmitted; a main control unit (201) for reading the data stored in the data storage unit (202) and for controlling; a signal modulation unit (203) for modulating the read data with a predetermined signal modulation method under the control of the main control unit (201) to generate and output a sequence of switching pulse signals; a light source driving circuit (204) for generating backlight driving switching pulse signals according to the sequence of switching pulse signals; and a display backlight member (205) for outputting a sequence of light and shade signals.