Display Electrode Layout for Input Sensing Noise Shielding
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Solution Overview
Problem
Existing display devices face challenges in reducing noise interference between input sensing units and other circuit elements, leading to performance degradation.
Innovation Solution
Incorporating a shielding electrode connected to the power supply electrode that overlaps and shields circuit elements, along with a connection electrode design that includes through-holes to minimize noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shielding electrode is added to reduce noise interference, then the reliability of input sensing units is improved, but the device complexity increases
Solution Approach 1:
The shielding electrode is merged with the power supply electrode, allowing the power supply electrode to serve dual functions: supplying power and providing noise shielding. This integration reduces the need for separate shielding structures, thereby improving reliability without proportionally increasing device complexity.
Solution Approach 2:
The power supply electrode is designed to perform multiple functions simultaneously: electrical power supply to the circuit elements and noise shielding for the input sensing units. This multi-functionality approach addresses the noise interference problem while minimizing additional structural complexity.
2Reliability
If connection electrodes with through-holes are used to minimize noise interference, then the reliability of input sensing units is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The connection electrode is segmented with through-holes that allow noise signals to pass through to the shielding electrode below, while the solid portions maintain electrical connectivity. This segmentation approach enables noise filtering functionality while using standard manufacturing processes for creating through-holes in conductive layers.
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
The shielding electrode effectively reduces noise interference, enhancing the performance and reliability of input sensing units in display devices.
Implementation Method 1
a shielding electrode connected to the power supply electrode and overlapping at least some of the circuit elements
Data Source
AI summary
A display device includes: a base layer including a display area (DA) and a non-DA; a circuit element layer on the base layer and including: a power supply electrode (PSE) overlapping the non-DA, circuit elements, and a shielding electrode connected to the PSE and overlapping some of the circuit elements; a display element layer on the circuit element layer and including: a light emitting element including a first electrode, a light emitting unit, and a second electrode, and a connection electrode connecting the second electrode to the PSE and including first through-holes; a thin film encapsulation layer (TFEL) on the display element layer and including an organic layer overlapping the DA; and an input sensing layer on the TFEL and including sensing electrodes and sensing signal lines connected to the sensing electrodes. The sensing signal lines overlap the connection electrode. Some of the first through-holes overlap the shielding electrode.