Display Panel Common Electrode Layer Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display panels have high requirements for materials of common electrodes, necessitating improved techniques for their manufacturing.
Innovation Solution
A display panel structure comprising a substrate, driving circuit layer, planarization layer, common electrode layer, pixel definition layer, light emitting layer, transparent pixel electrode layer, and electrode connecting layer, where the electrode connecting portion passes through via holes to connect the transparent pixel electrode and signal electrode, allowing the common electrode to be positioned away from the light emitting layer, thus reducing the need for high light transmittance materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the common electrode is formed after light emitting devices on TFT substrates, then the common electrode can be positioned to connect with signal electrodes, but the common electrode material requires high light transmittance and high resistance properties
Solution Approach 1:
The patent changes the spatial arrangement by forming the common electrode layer before the light emitting devices rather than after. This dimensional repositioning in the layer stacking sequence allows the common electrode to be covered by subsequent layers, eliminating the requirement for high light transmittance while maintaining electrical connection functionality through via holes.
Solution Approach 2:
The common electrode layer is formed in advance before the light emitting devices are constructed. This preliminary formation allows the common electrode to be positioned and connected to signal electrodes through pre-formed via holes, ensuring reliable electrical connection without requiring the material to have high light transmittance properties.
2Illumination intensity
If the common electrode material requires high light transmittance, then light can pass through to the light emitting layer, but the material selection is restricted and manufacturing complexity increases
Solution Approach 1:
The patent extracts the light transmittance requirement from the common electrode function. By repositioning the common electrode layer below the light emitting devices and covering it with subsequent layers, the light transmittance property is removed from the common electrode's functional requirements, allowing use of materials with higher conductivity and lower cost without restricting material selection.
Data Source
AI summary
The present invention provides a display panel and a manufacturing method thereof. The display panel includes a common electrode layer, a pixel definition layer, a light emitting layer, a transparent pixel electrode layer, and an electrode connecting layer which are sequentially stacked. An electrode connecting portion is formed on the electrode connecting layer and electrically connected with the transparent pixel electrode layer and a signal electrode. Because a common electrode is disposed in a light emitting direction away from the light emitting layer, a light transmittance is not required.