Display Substrate Layout for Two-Way Visible Light Communication
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Solution Overview
Problem
Existing wireless communication technologies face a shortage of spectrum resources and require expensive equipment, leading to electromagnetic interference, while visible light communication offers abundant bandwidth and low cost without interference, but lacks a complete two-way communication solution integrated with display technology.
Innovation Solution
A display substrate with integrated light receiving and emission units in peripheral and effective display regions, enabling both visible and infrared light communication, allowing for two-way communication between display terminals and illumination systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication technologies are used, then communication can be achieved, but spectrum resources are shortage and electromagnetic interference occurs
Solution Approach 1:
The patent replaces electromagnetic wave-based wireless communication with optical communication using visible light. The display substrate incorporates light emitting units that modulate visible light to carry communication information and light receiving units that detect the modulated light, substituting the electromagnetic field mechanism with an optical field mechanism to avoid electromagnetic interference while maintaining communication functionality
Solution Approach 2:
The patent changes the communication medium from electromagnetic spectrum to optical spectrum. By utilizing visible light (375-780 nm) which has abundant bandwidth and does not require authorization, the system transforms the communication parameter domain from radio frequency to optical frequency, thereby resolving the spectrum resource shortage and electromagnetic interference problems
2Adaptability or versatility
If visible light communication is used, then spectrum resources are abundant and cost is low, but a complete two-way communication solution integrated with display technology is lacking
Solution Approach 1:
The patent merges display functionality with communication functionality into a single integrated system. The display substrate simultaneously serves as both a visual display device and a communication interface by incorporating light emitting units in the effective display region and light receiving units in the peripheral region, eliminating the need for separate communication devices and achieving seamless integration
Solution Approach 2:
The display substrate is designed to perform multiple functions: visual display through light emitting sub-pixels and optical communication through integrated light emitting and light receiving units. This multi-functional design allows the same device to serve both display and communication purposes, enhancing versatility while managing complexity through unified hardware architecture
3Productivity
If light receiving units and light emission units are integrated in the display substrate, then two-way communication is enabled, but the structure becomes more complex
Solution Approach 1:
The patent segments the display substrate into functionally distinct regions: the effective display region contains light emitting sub-pixels for display and communication, while the peripheral region contains dedicated light receiving units for receiving communication signals. This spatial segmentation allows different functional elements to be organized in separate zones, reducing structural complexity while enabling two-way communication capability
Solution Approach 2:
The patent applies local quality by assigning different functional characteristics to different regions of the display substrate. The effective display region is optimized for light emission and display quality, while the peripheral region is optimized for light reception and communication sensitivity. This localized functional differentiation enables specialized performance in each region without requiring the entire substrate to be optimized for all functions
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 high-speed, interference-free two-way communication by utilizing visible and infrared light, enhancing communication capabilities in display devices and systems.
Implementation Method 1
the light receiving unit is configured to receive a light signal carrying communication information and convert the light signal into an electrical signal
Implementation Method 2
the light emission unit is configured to convert an electrical signal into a light signal carrying communication information and emit the light signal
Data Source
AI summary
A display substrate, a display apparatus, and a visible light communication system are disclosed. The display substrate includes an effective display region and a peripheral region surrounding the effective display region, the display substrate includes a base substrate, and a display unit, a light receiving unit, and a light emission unit on the base substrate. The display unit is in the effective display region and includes multiple light emitting sub-pixels; the light receiving unit is in at least one of a first light transceiving region and a second light transceiving region, the light emission unit is in at least one of a first light transceiving region and a second light transceiving region. The first light transceiving region is in the peripheral region and is an annular region surrounding the effective display region, and the second light transceiving region is between multiple light emitting sub-pixels of the effective display region.