Visible Light Communication Device Photosensitive Sensor Integration
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Solution Overview
Problem
Existing visible light communication technologies face challenges in integrating photosensitive regions and display regions effectively, leading to interference and reduced user experience due to the separate nature of these components, which affects the sensitivity and display quality.
Innovation Solution
A visible light communication device with an array substrate that integrates photosensitive sensors and pixels, where photosensitive sensors are dispersed among the pixels, allowing for alternative arrangements to minimize interference and enhance sensitivity, and a method for driving the device using time-division signals to separate the operation of photosensitive sensors and pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If photosensitive sensors and pixels are integrated on the same array substrate, then device integration and compactness are improved, but interference between photosensitive region and display region increases
Solution Approach 1:
The array substrate is divided into multiple pixel units, each containing both photosensitive sensors and display elements. This segmentation allows the photosensitive region and display region to be spatially separated within each pixel unit while maintaining integration at the substrate level, thereby reducing interference between the two regions.
Solution Approach 2:
Different regions within each pixel unit are assigned different functional properties: the photosensitive region is optimized for light detection with appropriate photosensitive materials and structures, while the display region is optimized for light emission with display elements. This local differentiation of functional qualities minimizes mutual interference while maintaining high integration.
2Measurement precision
If photosensitive sensors are placed among pixels, then sensitivity is improved through better light reception, but display quality may deteriorate due to blocked light paths
Solution Approach 1:
The photosensitive sensors and display elements are arranged in different spatial dimensions within each pixel unit. The photosensitive sensors are positioned to receive light from specific directions while the display elements emit light in other directions, utilizing spatial dimensionality to allow both functions to operate effectively without compromising sensitivity or display quality.
3Object-affected harmful factors
If time-division driving method is used to separate photosensitive sensor operation and pixel operation, then interference is reduced, but operation complexity increases
Solution Approach 1:
The device operates in periodic cycles where each cycle includes a photosensitive detection phase and a display phase. During the photosensitive detection phase, the photosensitive sensors are active and pixels are dimmed or turned off; during the display phase, pixels are active for light emission. This periodic time-division operation reduces interference between the two functions while the control circuitry manages the timing sequences.
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 integration improves the overall display effect and user experience by maintaining sensitivity while reducing the impact of the photosensitive region on the display, and enhances security through reduced interference from displayed images with the transmitted visible light signals.
Implementation Method 1
the at least one photosensitive sensor is configured to convert a received visible light signal carrying encoded information into an electric signal
Data Source
AI summary
The present disclosure provides a visible light communication device and a method for driving the same, a door lock and a visible light communication method. The visible light communication device includes an array substrate, the array substrate including a display region having a plurality of pixels and a photosensitive region having at least one photosensitive sensor, the at least one photosensitive sensor is configured to convert a received visible light signal carrying encoded information into an electric signal.