Display Panel Common Electrode Segmentation for Short-Circuit Prevention
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Solution Overview
Problem
In traditional liquid crystal display panels, the DBS common electrode easily remains at the pixel boundary and becomes short-circuited to the pixel electrode, leading to poor display performance, especially when pixel density is high and the topography of the color resist layer varies significantly.
Innovation Solution
The design of common electrode lines as disconnected segments with electrical connections through curved or polyline connecting lines that avoid passing through openings in the color resist block, ensuring no overlap and preventing short-circuits, while maintaining the common electrode lines and pixel electrodes on the same layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel density is increased, then the display resolution is improved, but the holes in the color resist layer become closer to the pixel boundary and the topography varies greatly, causing photoresist accumulation and making the DBS common electrode and pixel electrode easily remain at the boundary
Solution Approach 1:
The common electrode line is divided into multiple segments (first segment and second segment) that are separated by the opening in the color resist layer. This segmentation prevents the common electrode line from continuously passing through the opening, thereby avoiding short-circuits with the pixel electrode while still maintaining the shielding function.
Solution Approach 2:
The opening in the color resist layer acts as an intermediary element that physically separates the common electrode line into segments. This opening allows the pixel electrode to pass through for electrical connection while preventing the common electrode line from making continuous contact, thus avoiding short-circuits.
2Reliability
If the common electrode line is continuously connected to provide effective shielding, then the shielding performance is improved, but the photoresist accumulates in the holes and causes the common electrode line to short-circuit with the pixel electrode at the boundary
Solution Approach 1:
The common electrode line is segmented into multiple disconnected portions by the opening in the color resist layer. Each segment provides localized shielding, and the segments are electrically isolated from each other, preventing short-circuits with the pixel electrode while maintaining overall shielding effectiveness.
Solution Approach 2:
The common electrode line is extracted or removed from the opening region in the color resist layer. By taking out the continuous line structure and replacing it with segmented portions that avoid the opening, the design eliminates the short-circuit risk while preserving the shielding function through the remaining segments.
3Ease of operation
If the common electrode line passes through the opening in the color resist layer to maintain continuity, then the electrical connection is improved, but the pattern residue causes short-circuit between the common electrode line and pixel electrode
Solution Approach 1:
The common electrode line is segmented into multiple portions that do not continuously pass through the opening. The segments are positioned on opposite sides of the opening and are electrically isolated, preventing pattern residue from causing short-circuits while maintaining adequate connectivity through the segmented structure.
Solution Approach 2:
Instead of having the common electrode line pass through the opening (which causes short-circuits), the design inverts the approach by having the opening separate the common electrode line into segments. The segments are positioned to provide shielding and connectivity without making direct contact through the opening, thus avoiding the short-circuit problem.
Data Source
AI summary
The present disclosure provides a display panel including a plurality of pixel units and a plurality of common electrode line. The pixel units include a color resist block, the color resist block includes a first opening, each of the common electrode lines includes a first segment and a second segment that are arranged at intervals and respectively located on opposite sides of the first opening, the first segment and the second segment are electrically connected through a first connecting line, and an orthographic projection of the first connecting line on the base substrate does not coincide with an orthographic projection of the first opening on the base substrate.