Shielding Portion in Display Electrode Layers Reduces Interference
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Solution Overview
Problem
Electrical interference occurs between signal lines for light-emitting diodes and photodiodes in display apparatuses, affecting image quality.
Innovation Solution
A display apparatus design with a shielding portion integrated into the voltage line that overlaps signal lines to reduce parasitic capacitance and interference, including a specific electrode layer structure with connection lines and signal lines arranged to minimize cross-talk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines for light-emitting diodes and photodiodes are arranged adjacent to each other, then the device area is reduced and integration is improved, but electrical interference and parasitic capacitance between lines increase
Solution Approach 1:
A shielding portion is introduced as an intermediary element between the first connection line and the signal line. This shielding portion, positioned in the second electrode layer, acts as a mediator that reduces parasitic capacitance and electrical interference while allowing the lines to remain adjacent for compact integration.
Solution Approach 2:
The electrode layers are segmented into distinct functional regions: the first electrode layer contains connection lines, the second electrode layer contains both voltage lines with shielding portions and signal lines, and the third electrode layer contains additional signal lines. This segmentation allows careful control of line interactions while maintaining compact area.
2Object-affected harmful factors
If shielding portions are added to reduce parasitic capacitance, then electrical interference is reduced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The shielding portion is merged with the second electrode layer structure, forming an integrated design where the shielding function is incorporated into the existing electrode architecture rather than being added as a separate complex component. This reduces manufacturing steps while achieving the shielding effect.
Solution Approach 2:
The second electrode layer serves multiple functions: it provides electrical connection through voltage lines, acts as a shielding layer to reduce parasitic capacitance, and maintains structural integrity. This multi-functionality reduces the need for additional dedicated shielding structures.
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 solution effectively reduces electrical interference, enhancing image quality and signal-to-noise ratio by minimizing parasitic capacitance between signal lines.
Implementation Method 1
electrical interference may occur between the lines... reduces electrical interference... by minimizing parasitic capacitance between signal lines
Data Source
AI summary
A display apparatus including a plurality of pixels and a plurality of light detectors, the display apparatus including: a first electrode layer on a substrate and including a first connection line extending in a first direction; a second electrode layer on the first electrode layer, the second electrode layer including a first voltage line extending in a second direction crossing the first direction and a shielding portion protruding from the first voltage line in the first direction to overlap the first connection line; and a third electrode layer on the second electrode layer and including a second connection line and a signal line extending in the second direction.