Slit Electrode Turning Ends for Liquid Crystal Anchoring
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Solution Overview
Problem
The existing ADS-mode based display devices suffer from afterimage phenomena due to weak anchoring forces on liquid crystal molecules, leading to dark areas that are not effectively shielded by the black matrix, impacting visual experience and display quality.
Innovation Solution
The array substrate design incorporates slit electrodes with turning ends, enhancing the electric field intensity and deflection of liquid crystal molecules, ensuring consistent deflection directions and reducing dark areas, which can be shielded by the black matrix, thereby improving afterimage issues and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the slit width is large, then the manufacturing is easier and the aperture ratio is improved, but the anchoring force on liquid crystal molecules becomes weak causing dark areas and afterimage phenomena
Solution Approach 1:
The patent applies curvature by designing the slit electrode with rounded ends instead of straight edges. This curved geometry concentrates the electric field at the rounded termini, creating stronger anchoring forces on the liquid crystal molecules at the slit boundaries. The curved shape allows the electric field to extend further into the liquid crystal layer, improving molecular alignment without requiring narrower slits, thus resolving the contradiction between slit width and anchoring force.
2Area of stationary object
If the slit width is large, then the aperture ratio is improved, but dark areas are generated that cannot be shielded by the black matrix
Solution Approach 1:
The rounded ends of the slit electrode create a more uniform electric field distribution that prevents the formation of dark areas. The curved geometry ensures that liquid crystal molecules are properly aligned throughout the slit region, eliminating the dark zones that would otherwise appear during image switching. This allows the black matrix to effectively shield the slit areas without creating visible afterimages.
Solution Approach 2:
The patent applies local quality by modifying only the end regions of the slit electrode while maintaining the overall slit structure. The rounded ends create localized electric field enhancement precisely where needed at the slit boundaries, improving liquid crystal alignment in these critical areas without affecting the overall aperture ratio. This localized modification eliminates dark areas while preserving the benefits of wider slits.
3Speed
If the electric field intensity is increased to improve liquid crystal deflection, then the response speed is improved, but the energy consumption increases
Solution Approach 1:
The curved ends of the slit electrode concentrate the electric field in specific regions, achieving strong liquid crystal deflection forces without requiring high overall voltage. The rounded geometry creates natural field enhancement at the termini, allowing fast response speeds to be achieved with moderate energy input. This geometric optimization provides efficient energy utilization by directing the electric field where it is most needed.
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
The enhanced electric field intensity and regular liquid crystal molecule arrangement significantly reduce dark areas, eliminating afterimages and improving display quality by increasing light transmission and aperture ratio.
Implementation Method 1
The ADS-mode based display forms a multi-dimensional electric field through the electric field generated at the edge of the slit electrode in the same plane and the electric field generated between the slit electrode and a plate electrode, so as to enable the oriented liquid crystal molecules between the slit electrodes
Implementation Method 2
since this part of slit has a relatively large width, the anchoring force of the electric field to the liquid crystal molecules at certain positions is relatively weak
Data Source
AI summary
The present invention discloses an array substrate, a liquid crystal panel and a display device. The array substrate comprises a plurality of pixel units arranged in array and delimited by a plurality of gate lines and a plurality of data lines cross each other, each pixel unit comprising a thin film transistor, a plate electrode and a slit electrode located above the plate electrode. The slit electrode comprises a plurality of electrode strips and a slit is formed between adjacent electrode strips. Two ends of each slit of the slit electrode both have a turning. The design of turning can increase the intensity of the electric field that controls deflection of the liquid crystal molecules. When the picture content displayed by the display device is switched, most liquid crystal molecules can be deflected quickly, thereby enabling the light effect to be increased and the dark area weakened.