Array Substrate Compensation Electrode Vertical Separation
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Solution Overview
Problem
Current multi-domain liquid crystal display technologies face challenges in maintaining uniform liquid crystal alignment and balancing voltages across sub-zones, leading to issues like poor view angle and increased complexity due to the use of multiple thin film transistors, which can result in overlapping electrodes and shielding of common electrode signals.
Innovation Solution
The proposed array substrate design includes a base plate with scan and data lines forming sub-pixels, where each sub-pixel has a main and sub-zone with specific electrodes, a compensation electrode that connects through a hole to the sub-zone common electrode, and a configuration that ensures the compensation electrode does not overlap with the sub-zone pixel electrode, allowing for improved liquid crystal alignment and balanced voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the distance between wires is reduced to effectively utilize design space, then space utilization is improved, but the compensation electrode overlaps with the pixel electrode, causing common electrode signals to be shielded and liquid crystal alignment to deteriorate
Solution Approach 1:
The patent introduces a through-hole structure that extends vertically through multiple layers (insulating layer and electrode layer), transitioning the problem from a 2D plane overlap issue to a 3D spatial solution. The compensation electrode is positioned in a lower layer while the pixel electrode is in an upper layer, separated by a through-hole, thus resolving the overlap conflict by utilizing the vertical dimension.
Solution Approach 2:
The patent divides the electrode structure into distinct layers and regions: the compensation electrode is segmented into a lower-layer structure, the through-hole provides a vertical separation segment, and the pixel electrode forms an upper-layer structure. This segmentation allows each electrode to fulfill its function without interfering with the other, despite their horizontal projection areas overlapping.
2Adaptability or versatility
If multiple thin film transistors are used to divide one sub pixel into main zone and sub zone, then multi-domain display capability is improved, but the aperture ratio of the pixel decreases
Solution Approach 1:
The patent merges the compensation electrode function with the common electrode structure by electrically connecting them through the through-hole. This integration allows the compensation electrode to share the common electrode's voltage control capability, reducing the need for separate control circuits and minimizing the space required for additional components, thereby preserving aperture ratio while achieving multi-domain functionality.
3Stability of the object's composition
If charge sharing technology is adopted to divide sub pixel into main zone and sub zone, then display uniformity is improved, but voltage balance between main zone and sub zone becomes difficult to control
Solution Approach 1:
The patent establishes equipotential connection between the compensation electrode and the common electrode through the conductive through-hole structure. This ensures that both electrodes operate at the same potential, simplifying voltage control and making it easier to balance the voltages between main zone and sub zone, thereby reducing display uniformity issues while lowering control complexity.
Data Source
AI summary
The present disclosure provides an array substrate, a display panel, and a display device. The array substrate includes a base plate, the sub zone common electrode, the compensation electrode, and the sub zone pixel electrode are formed on the base plate in sequence, the projection area of the compensation electrode on the base plate is spaced from the projection area of the sub zone pixel electrode on the base plate.