Display Panel Trench Electrodes for Current and Heat Distribution
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Solution Overview
Problem
Existing display devices face issues with current and heat concentration at the contact area between the ground voltage supply line and the cathode electrode, leading to potential faults and reduced lifespan.
Innovation Solution
The display device incorporates a trench pixel electrode in the non-display area, with additional ground voltage supply pads connected to the cathode electrode, distributing the current and heat to prevent concentration and reduce the risk of faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the contact area between the ground voltage supply line and the cathode electrode is expanded, then the current and heat concentration is reduced, but the device complexity increases due to additional trench pixel electrodes and ground voltage supply pads
Solution Approach 1:
The ground voltage supply function is segmented into multiple contact areas: a first contact area between the ground voltage supply line and the cathode electrode, and a second contact area between the trench pixel electrode and the cathode electrode. This segmentation distributes the current and heat load across multiple locations, reducing concentration at any single point while maintaining functional effectiveness.
Solution Approach 2:
The solution introduces a vertical dimension by creating a trench structure that extends below the surface level. The trench pixel electrode is formed in a trench area, adding a depth component to the contact area configuration. This dimensional change allows for additional contact pathways without increasing the planar footprint, effectively distributing heat and current in three-dimensional space.
2Reliability
If additional ground voltage supply pads and trench pixel electrodes are added, then the reliability is improved by distributing current and heat, but the manufacturing precision requirements increase
Solution Approach 1:
The trench structure and trench pixel electrode are formed in advance during the manufacturing process, before final assembly. This preliminary formation of the trench and electrode structures ensures proper alignment and positioning, reducing the precision requirements for subsequent assembly steps. The trench pixel electrode is pre-configured to make contact with the cathode electrode at the intended second contact area.
Data Source
AI summary
A display device may include: a display panel having a display area; a non-display area disposed outside the display area; and a first source film and a second source film attached to the non-display area. The display panel may include: a substrate; a first ground voltage supply pad disposed on the substrate and electrically connected to the first source film; a trench pixel electrode electrically connected to the first ground voltage supply pad and disposed in a trench area of the non-display area; and a cathode electrode on the substrate, and the cathode electrode may be electrically connected to the trench pixel electrode in the trench area.