Shielding Electrode for Display Sensor Noise Reduction
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Solution Overview
Problem
Current display devices face challenges in enhancing the sensing sensitivity of sensors integrated into the display panel, particularly for fingerprint recognition, due to interference from data lines and pulsed data voltages which affect the signal-to-noise ratio of sensing signals.
Innovation Solution
The implementation of a shielding electrode structure where the receiving line is disposed in a different layer than the data line, with shielding electrodes applied between the data lines and receiving lines 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 data lines and receiving lines are disposed in the same layer, then the device complexity is reduced, but the sensing sensitivity deteriorates due to noise interference from pulsed data voltages
Solution Approach 1:
The patent resolves the contradiction by transitioning from a same-layer configuration to a multi-layer configuration where data lines and receiving lines are separated vertically. This dimensional change eliminates electrical interference while maintaining signal integrity, achieving improved sensing sensitivity without excessive complexity increase.
Solution Approach 2:
The patent introduces shielding electrodes as intermediary elements positioned between the data lines and receiving lines. These shielding electrodes act as mediators that block electromagnetic interference from pulsed data voltages from affecting the receiving lines, thereby protecting the sensing signal while allowing both line types to coexist in the device architecture.
2Measurement precision
If shielding electrodes are added between data lines and receiving lines, then the sensing sensitivity is improved by blocking noise, but the device complexity increases
Solution Approach 1:
The patent employs shielding electrodes as intermediary components positioned between data lines and receiving lines. These shielding electrodes serve as electromagnetic barriers that block noise from pulsed data voltages from interfering with the receiving lines, thereby improving the signal-to-noise ratio while adding a controlled level of structural complexity.
Solution Approach 2:
The patent extracts the interference problem from the signal transmission path by introducing shielding electrodes that isolate the receiving lines from data line interference. This extraction approach separates the harmful electromagnetic fields from the sensitive sensing signals, improving measurement precision while managing device complexity through targeted shielding rather than complete isolation.
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 by reducing noise interference, leading to improved signal quality and accuracy in fingerprint recognition and other sensing applications.
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
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.