Low-Resistance Electrode for Display Substrate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display panels with high resistance in the common electrode lead to defects such as stains, reducing transmissivity, and require light-blocking members that further decrease panel transparency.
Innovation Solution
A display substrate with a low-resistance electrode pattern that overlaps with the gate and data metal patterns, electrically connected to the common electrode, reducing its resistance and allowing uniform voltage application, thereby minimizing defects and omitting the need for a common line and contact hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent layer including indium zinc oxide (IZO) is used for the common electrode, then the electrode can be formed, but the resistance becomes high causing defects like stains
Solution Approach 1:
The patent uses a composite structure combining IZO layer with additional transparent conductive material layers to achieve both transparency and low resistance. The multi-layer composite electrode structure allows optimization of both optical and electrical properties simultaneously.
Solution Approach 2:
The common electrode structure is merged with the pixel electrode structure by forming both electrodes using the same transparent conductive material system, allowing uniform electrical properties across the display panel while maintaining transparency.
2Reliability
If a light-blocking member is used to block the contact hole and common line, then the high resistance defects are prevented, but the transmissivity of the panel is reduced
Solution Approach 1:
The patent extracts and eliminates the light-blocking member from the display structure by redesigning the electrode configuration. The common line and contact hole blocking structures are removed, allowing light to pass through these areas without obstruction while maintaining electrical functionality through alternative electrode routing.
Solution Approach 2:
Instead of blocking light with a light-blocking member, the patent inverts the approach by making the electrode structure itself transparent and conductive, allowing light to pass through while maintaining electrical function. The solution transitions from blocking harmful elements to creating beneficial transparent conductive pathways.
Data Source
AI summary
A display substrate includes a gate metal pattern including a gate line on a base substrate and extending in a first direction, and a gate electrode electrically connected with the gate line, a data metal pattern on the gate metal pattern and including a data line extending in a second direction crossing the first direction, a source electrode electrically connected with the gate line and a drain electrode spaced apart from the source electrode, a first electrode pattern on the data metal pattern, a low-resistance electrode pattern on the first electrode pattern and entirely overlapping with the gate metal pattern and the data metal pattern and a second electrode pattern overlapping with the first electrode pattern.