Display Substrate Dual Sensing Layers Photoconductive Bridges
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Solution Overview
Problem
Current touch-control display apparatuses face limitations in accurately determining light illumination positions across large-size displays, particularly in distinguishing between touch and light control inputs, which affects the precision and functionality of interactive features.
Innovation Solution
A display substrate with a dual sensing layer structure, comprising first and second sensing electrodes with photoconductive bridges that change conductivity based on light exposure, allowing for precise detection of light illumination positions by measuring current flows, and a method for controlling the display apparatus by applying electrical potential differences and detecting current changes to differentiate between touch and light inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single sensing layer with touch-control electrodes is used, then the display apparatus can detect touch inputs, but it cannot accurately distinguish between touch and light control inputs
Solution Approach 1:
The sensing system is segmented into two separate sensing layers: a first sensing layer with first sensing electrodes for touch control detection, and a second sensing layer with second sensing electrodes for light control detection. This segmentation allows each layer to specialize in detecting specific types of inputs, enabling accurate differentiation between touch and light control inputs while maintaining versatility in input detection capabilities.
2Measurement precision
If photoconductive resistance materials are used for virtual electrodes, then light sensitivity is improved, but the structural complexity increases
Solution Approach 1:
The invention adds a vertical dimension to the sensing structure by stacking two sensing layers at different heights above the substrate. The first sensing layer is positioned at a first height and the second sensing layer at a second height, creating a three-dimensional sensing architecture. This dimensional approach allows simultaneous implementation of touch and light control functionality while maintaining clear structural organization and facilitating precise light illumination position detection through the photoconductive materials.
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 accurate determination of light illumination positions and remote control functionality, enhancing the interactive capabilities of display apparatuses by distinguishing between touch and light inputs with high precision.
Implementation Method 1
first photoconductive bridges interposed between the pair of first sub-electrodes... second photoconductive bridges interposed between the pair of second sub-electrodes
Data Source
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AI summary
The present application discloses a display substrate. The display substrate includes a base substrate; a first sensing layer having a plurality of first sensing electrodes extending substantially along a first direction; and a second sensing layer insulated from the first sensing layer and having a plurality of second sensing electrodes extending substantially along a second direction. Each of the plurality of first sensing electrodes includes a pair of first sub-electrodes substantially parallel to each other and extending substantially along the first direction, and a plurality of first photoconductive bridges each of which interposed between the pair of first sub-electrodes. Each of the plurality of second sensing electrodes includes a pair of second sub-electrodes substantially parallel to each other and extending substantially along the second direction, and a plurality of second photoconductive bridges each of which interposed between the pair of second sub-electrodes.