IPS Pixel Electrode Height Variation for Spacer Stress
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Solution Overview
Problem
In in-plane switching (IPS) display technology, the relative displacement of spacers during the support process causes pixel electrodes to be squeezed and cracked, leading to undesirable dark lines in pixel displays due to the inability of liquid crystals to deflect vertically through fractures in the pixel electrode.
Innovation Solution
The pixel structure is designed with first and second trunk portions of varying heights, where the first trunk portions are within the orthographic projection range of the spacer's offset and the second trunk portions are outside, forming a plane that increases the pressure-bearing capacity of the pixel electrode, preventing cracks and fractures by dispersing pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If spacers are used to support the pixel electrode structure, then the structural stability is improved, but the relative displacement of spacers during support process causes pixel electrode to be squeezed and cracked
Solution Approach 1:
The pixel electrode is segmented into multiple independent conductive strips arranged in parallel, rather than a single continuous electrode. This segmentation allows the structure to accommodate spacer displacement without causing catastrophic cracking, as each strip can independently deform and recover, preventing the propagation of stress fractures across the entire electrode.
Solution Approach 2:
The conductive strips are positioned at specific locations within the pixel electrode area, creating localized conductive pathways. This local quality arrangement ensures that the electrode maintains functionality even if certain regions experience stress or displacement, as other strips remain intact and operational.
2Reliability
If the pixel electrode is formed as a continuous structure, then the electrical conductivity is improved, but the continuous structure is more susceptible to cracking under spacer pressure
Solution Approach 1:
The continuous pixel electrode is divided into multiple parallel conductive strips. Each strip maintains sufficient width and spacing to provide adequate electrical conductivity for pixel operation, while the gaps between strips prevent stress propagation that would occur in a continuous structure, allowing each strip to independently withstand mechanical pressure from spacers.
Solution Approach 2:
The pixel electrode structure combines conductive material strips with insulating or non-conductive spacing regions, creating a composite structure that maintains electrical functionality through the conductive strips while the overall patterned structure provides mechanical resilience against spacer-induced stress.
Data Source
AI summary
A pixel structure, a display panel and a display device. The pixel structure includes a pixel electrode and a common electrode. The pixel electrode and the common electrode each is one of a pixel electrode and a common electrode. The common electrode includes a plurality of first branch portions. The pixel electrode includes second branch portions and a plurality of trunk portions. The second branch portions and the first branch portions are alternately arranged at intervals. In the present application, portions of the pixel electrode within an orthographic projection range of an offset of a spacer are extended to form a plane by configuring a height of each first trunk portion to be higher than a height of each second trunk portion along a linear direction in which the second branch portions are located, thereby increasing the pressure-bearing capacity of the pixel electrode.