Array Substrate Electrode Layout for LCD Dark Stripe Reduction
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Solution Overview
Problem
Existing liquid crystal display panel array substrates suffer from weakened electric field edges, leading to dark stripes and decreased transmittance, which affects display quality.
Innovation Solution
Incorporating a second electrode layer with common electrode wirings between pixel electrodes, aligned with the edge direction of adjacent pixel electrodes, to enhance electric field intensity and reduce dark stripe areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If pixel electrodes are arranged in the display area, then the display function is achieved, but dark stripes are generated at the edges due to weakened electric field
Solution Approach 1:
A common electrode wiring layer is introduced as an intermediary between adjacent pixel electrodes. This wiring layer serves as a mediator to supplement and strengthen the weakened edge electric fields, preventing dark stripe formation while maintaining the normal pixel electrode structure and display function.
Solution Approach 2:
The common electrode wirings are strategically positioned only at the edge regions where electric field weakening occurs. The wiring layer has different electrical properties compared to the pixel electrodes, creating localized electric field enhancement precisely where needed to counteract the edge effect and improve transmittance in those specific areas.
2Illumination intensity
If common electrode wirings are added between pixel electrodes, then electric field intensity is enhanced and dark stripes are reduced, but device structure becomes more complex
Solution Approach 1:
The common electrode wiring layer serves multiple functions simultaneously: it acts as an electrical connection path, provides electric field enhancement at pixel edges, and functions as a structural support element. By combining these functions into a single component, the design avoids the need for separate structures for each function, thereby reducing overall device complexity despite the added functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves transmittance and display quality by maintaining consistent electric field intensity across the edges of pixel electrodes, reducing dark stripe areas and enhancing overall performance.
Implementation Method 1
due to the gradual weakening of the electric field of edges of pixel electrodes, dark stripes are generated at the edges of the pixel electrodes
Implementation Method 2
One of the common electrode wirings is provided between at least adjacent two of the pixel electrodes and insulated from the adjacent two of the pixel electrodes
Data Source
AI summary
An array substrate includes a substrate, a first electrode layer, an insulation layer, and a second electrode layer disposed in sequence. The substrate includes a display area and a non-display area. The first electrode layer includes a first common electrode located in the display area. The second electrode layer includes multiple pixel electrodes located in the display area and multiple common electrode wirings. The multiple pixel electrodes are spaced apart from each other, and the common electrode wiring is disposed between at least two adjacent pixel electrodes. An extension direction of the common electrode wiring is consistent with an extension direction of an edge of the adjacent pixel electrode.