Shaped Electrode Openings for LCD Response Speed
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Horizontal alignment-mode liquid crystal display devices face challenges in achieving high-definition pixels with rapid response speed, as existing electrode shapes become complicated and difficult to form for ultra-high-definition pixels, limiting their performance compared to vertical alignment modes.
Innovation Solution
The design incorporates a first and second opening in the electrode, which are independent and point-symmetrical, featuring curved portions that expand outward at the ends and paired protruding portions, allowing for improved alignment and response speed without complex shapes, suitable for high-definition pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a complicated electrode shape (comb-teeth portion) is provided to improve response speed, then response speed is improved, but device complexity and manufacturing difficulty increase significantly
Solution Approach 1:
The electrode opening is segmented into multiple functional regions: a main body portion and four protruding portions extending in specific directions. This segmentation creates effective fringe electric fields for rapid response while maintaining a simpler overall structure compared to comb-teeth designs.
Solution Approach 2:
The protruding portions are strategically positioned asymmetrically relative to the main body, extending in specific directions to optimize fringe electric field distribution. This asymmetric design achieves effective liquid crystal alignment control without requiring symmetric comb-teeth structures on all sides.
2Ease of manufacture
If electrode shape is simplified for ultra-high-definition pixels (800 ppi or more), then ease of manufacture improves, but response speed deteriorates
Solution Approach 1:
The electrode opening has different local characteristics: the main body portion provides a stable base area, while the protruding portions create localized fringe electric fields. This local quality differentiation achieves rapid response in critical areas without requiring complex shapes throughout the entire electrode structure.
Solution Approach 2:
Instead of providing comb-teeth portions on all four sides (excessive action), the design uses protruding portions on only two opposite sides (partial action). This partial implementation is sufficient to generate the necessary fringe electric fields for improved response speed while maintaining manufacturability for ultra-high-definition pixels.
3Adaptability or versatility
If horizontal alignment mode is used to achieve wide viewing angle, then viewing angle characteristics improve, but response speed deteriorates compared to vertical alignment modes
Solution Approach 1:
The protruding portions are pre-positioned to create fringe electric fields that actively promote rapid liquid crystal molecule rotation. This preliminary structural arrangement ensures that when voltage is applied, the liquid crystal molecules are already positioned to respond quickly, compensating for the typically slower response of horizontal alignment modes.
Solution Approach 2:
The fringe electric field generated by the protruding portions acts as an intermediary mechanism that facilitates faster liquid crystal response. This intermediate electric field structure enables horizontal alignment mode to achieve response speeds closer to vertical alignment modes while maintaining wide viewing angle characteristics.
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 enables higher definition and improved response speed in horizontal alignment-mode liquid crystal display devices, maintaining symmetry and stability even at high voltages, thus enhancing transmittance and display performance.
Implementation Method 1
a second electrode closer to the liquid crystal layer than the first electrode is... the alignment of liquid crystal molecules can be controlled... formation of a fringe electric field
Data Source
AI summary
A liquid crystal display device of the present invention includes, in the given order: a first substrate; a liquid crystal layer containing liquid crystal molecules; and a second substrate. The first substrate includes a first electrode, a second electrode closer to the liquid crystal layer than the first electrode is, and an insulating film between the first electrode and the second electrode. The second electrode is provided with openings including a first opening and a second opening adjacent to each other. The first opening and the second opening are independent of each other and are point-symmetrical to each other. The first opening and the second opening each have a shape including: curved portions that expand an opening periphery outward at the respective ends in the longitudinal direction; and paired protruding portions that allow the opening periphery to protrude partially in the lateral direction in the middle of the longitudinal direction. The liquid crystal molecules are aligned parallel to the first substrate in a no-voltage-applied state where no voltage is applied between the first electrode and the second electrode.