Array Substrate Secondary Pixel Electrode Aperture Ratio
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Solution Overview
Problem
The use of a metal mask layer made of opaque material in liquid crystal display panels decreases the aperture ratio, leading to poor display performance.
Innovation Solution
The design of an array substrate with a secondary pixel electrode surrounding the primary pixel electrode near the data lines, which isolates interference and prevents coupling capacitors from forming, allowing for the cancellation of the metal mask layer and enhancement of the aperture ratio and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal mask layer made of opaque material is disposed around the PE electrodes to mask coupling capacitors, then voltage variation is prevented and display quality is improved, but the aperture ratio of the display panel decreases
Solution Approach 1:
The invention extracts and removes the metal mask layer from the display panel structure. Instead of using a separate metal mask layer to mask coupling capacitors, the design relies on the inherent structure of the pixel electrodes and their positioning relative to data lines, thereby eliminating the need for the opaque metal mask layer and improving the aperture ratio while maintaining display quality.
Solution Approach 2:
The invention merges the function of the metal mask layer into the pixel electrode structure itself. The pixel electrodes are designed with specific shapes and positions that inherently mask the coupling capacitors formed among data lines and PE electrodes, combining the electrode function with the masking function that was previously performed by a separate metal mask layer.
2Reliability
If a metal mask layer is disposed around the PE electrodes to prevent voltage variation, then coupling capacitor interference is reduced, but the number of manufacturing processes increases
Solution Approach 1:
The invention extracts the metal mask layer from the manufacturing process entirely. By designing the pixel electrodes with specific geometries and positions that inherently provide masking functionality, the separate metal mask layer deposition process is eliminated, reducing manufacturing complexity while maintaining voltage stability.
Solution Approach 2:
The pixel electrodes are designed to perform multiple functions simultaneously: they serve as the primary functional electrodes for display operation and also provide the masking function for coupling capacitors. This multi-functionality eliminates the need for a separate metal mask layer and its associated manufacturing processes.
Data Source
AI summary
The present invention discloses an array substrate and a display panel. The array substrate includes an underlay substrate, scan lines disposed transversely, data lines disposed longitudinally, and a plurality of pixel units. Each pixel unit has a primary region and a secondary region. The pixel unit has a primary pixel electrode in the primary region and a secondary pixel electrode in the secondary region. The primary pixel electrode and the secondary pixel electrode are disposed at an interval, and the secondary pixel electrode surrounds a portion of the primary pixel electrode near the data lines.