Display Panel Shielding Layout for Fingerprint Sensing Noise
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Solution Overview
Problem
Current display devices face challenges in enhancing the sensing sensitivity of sensors, particularly fingerprint sensors, integrated into the display panel, due to interference from data lines and pulsed signals, which affect the signal-to-noise ratio and overall sensing performance.
Innovation Solution
The display device incorporates a specific layout where the receiving line is disposed in a different layer than the data line, with shielding electrodes placed between them to block the influence of pulsed data voltages, thereby reducing noise and improving sensing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the receiving line is disposed in the same layer as the data line, then the device structure is simpler, but noise interference from data lines affects sensing sensitivity
Solution Approach 1:
The patent applies dimensionality change by moving the receiving line from the same layer as the data line to a different layer, thereby separating them in the vertical dimension. This spatial separation reduces electromagnetic interference and noise coupling between the data line and receiving line, improving sensing sensitivity without significantly complicating the overall device structure.
Solution Approach 2:
The patent introduces a shielding electrode as an intermediary element positioned between the data line and receiving line. This shielding electrode acts as a mediator that blocks or reduces the electromagnetic interference from the data line, thereby protecting the receiving line and improving signal quality for fingerprint sensing.
2Measurement precision
If shielding electrodes are added between data lines and receiving lines, then noise interference is reduced, but device complexity increases
Solution Approach 1:
The shielding electrode serves as an intermediary component that is strategically positioned between the data line and receiving line. It functions as an electromagnetic shield that blocks noise propagation while maintaining electrical isolation, thereby improving the signal-to-noise ratio for fingerprint sensing without requiring complete restructuring of the device architecture.
Solution Approach 2:
The shielding electrode is applied locally only in the regions where interference occurs between data lines and receiving lines, rather than throughout the entire device. This localized approach reduces noise interference at critical points while minimizing the overall increase in device complexity and material usage.
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 configuration enhances the sensing sensitivity of integrated sensors by minimizing noise interference and improving the signal-to-noise ratio, leading to more accurate fingerprint recognition and user authentication.
Implementation Method 1
a shielding electrode that is disposed above the first-second line and that overlaps the first-second line and the receiving line
Data Source
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AI summary
Disclosed is a display device which includes a first-first line that extends in a first direction, a first-second line that extends in a second direction crossing the first direction and that is connected to the first-first line, a data line that extends in the first direction and that is connected to the first-second line, a pixel connected to the data line, a receiving line that extends in the first direction, a sensor connected to the receiving line, and a shielding electrode that overlaps the first-second line and the receiving line.