Bent Transparent Electrodes for ADS LCD Edge Stability
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Solution Overview
Problem
Existing liquid crystal display panels in ADS mode suffer from irregular liquid crystal molecule arrangements at the edge of pixel units due to lateral electric fields, leading to persistent press or scratch traces when subjected to external forces.
Innovation Solution
The array substrate features a second transparent conductive layer with a slit structure and bent ends of transparent electrodes, forming a horizontal electric field that complements the electric field strength and weakness, preventing irregular arrangements and maintaining consistent deflections of liquid crystal molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional ADS mode array substrate is used with straight transparent electrodes, then the manufacturing process is simple, but liquid crystal molecules at the edge of pixel units produce irregular arrangement due to lateral electric fields, leading to persistent press or scratch traces
Solution Approach 1:
The transparent electrodes are designed with bent structures at their ends instead of straight edges. This curvature modification changes the electric field distribution at the electrode edges, preventing the lateral electric field from causing irregular liquid crystal molecule arrangement. The bent structure smoothly redirects the electric field lines, eliminating the harmful field concentration at sharp edges while maintaining the overall electrode functionality.
2Reliability
If the transparent electrodes have bent structures at both ends, then liquid crystal molecule arrangement becomes uniform and press/scratch traces are eliminated, but the manufacturing precision requirements increase
Solution Approach 1:
The bent structure parameters (bending radius, bending angle, bend position) are optimized to achieve the desired electric field distribution. By carefully selecting these geometric parameters, the patent ensures that the bent electrodes produce a uniform electric field that aligns liquid crystal molecules properly without requiring extremely tight manufacturing tolerances. The parameter optimization balances performance improvement with manufacturing feasibility.
3Illumination intensity
If straight transparent electrodes are used in ADS mode, then the device structure is simple, but the light-transmitting ratio consistency across the display panel is poor due to edge effects
Solution Approach 1:
The bent structures at the ends of transparent electrodes modify the electric field distribution at the edges, which directly affects liquid crystal molecule alignment. This improved alignment consistency across the pixel unit edges ensures uniform light transmission. The curved electrode ends eliminate the sharp field concentration that causes local variations in light-transmitting ratio, achieving consistent display brightness across the entire panel.
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
This configuration enhances the display effect by ensuring consistent light-transmitting ratios and preventing press or scratch traces, improving the overall performance of the liquid crystal display panel.
Implementation Method 1
the common electrode 32 and the pixel electrode 33 form a horizontal electric field therebetween, and the liquid crystal molecules 34 undergo deflection along the direction of the electric field
Data Source
AI summary
An array substrate, a liquid crystal display panel (20) and a display device. The array substrate comprises: a substrate (10); a first transparent conductive layer (11) disposed on the substrate (10); an insulating layer (12) disposed on the first conductive layer (11); and a second transparent conductive layer (13) disposed on the insulating layer (20) and configured for forming a horizontal electric field with the first transparent conductive layer (11); the second conductive layer (13) comprises a plurality of transparent electrodes (14), adjacent transparent electrodes (14) possess a slit structure therebetween, and two ends of each transparent electrode each possess a bent structure (16).