Pixel Electrode Branches and Orientation Layer for LCD Transmittance
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Solution Overview
Problem
Conventional liquid crystal display panels suffer from reduced transmittance due to light-blocked areas with liquid crystal molecules oriented at 0 degrees or 90 degrees to the X axis, leading to disclination lines and poor displaying performance.
Innovation Solution
A pixel electrode structure with a frame and electrode branches extending at 45 degrees, forming a cruciform or snow flake-like opening, and an orientation layer below the frame to adjust liquid crystal orientations, converting light-blocked areas into light-transmitting areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a snow flake like pixel electrode structure with vertical and horizontal main trunks is used to create specific liquid crystal aligning directions, then liquid crystal molecules can be oriented at ±45 degrees and ±135 degrees, but light-blocked areas are formed at the center reducing aperture ratio
Solution Approach 1:
The pixel electrode is segmented into multiple independent branches extending from the frame at 45-degree angles, with cutoffs between adjacent branches. This segmentation eliminates the central light-blocked area while maintaining the required liquid crystal alignment directions in each domain.
Solution Approach 2:
The electrode branches are arranged asymmetrically with respect to the frame, extending into the pixel area at specific 45-degree angles rather than forming a symmetric snow flake pattern. This asymmetric arrangement allows light to pass through the center while still creating the necessary alignment domains.
2Device complexity
If liquid crystal molecules are oriented at 0 degrees or 90 degrees to the X axis in certain areas, then the pixel electrode structure can be simplified, but disclination lines are formed reducing transmittance
Solution Approach 1:
Different regions of the pixel electrode are assigned different functions: the frame provides electrical connection, the branches at 45-degree angles create specific alignment domains, and the orientation layer below the frame adjusts liquid crystal orientations in light-blocked areas. This local differentiation eliminates disclination lines while maintaining structural simplicity.
Solution Approach 2:
An orientation layer is introduced as an intermediary component between the pixel electrode and the liquid crystal. This orientation layer, positioned below the frame, modifies the liquid crystal orientation in areas where the electrode structure would otherwise create disclination lines, thereby improving transmittance without complicating the electrode design.
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 solution effectively eliminates disclination lines and improves transmittance by altering the orientation of liquid crystal molecules, enhancing the displaying performance of liquid crystal display panels.
Implementation Method 1
an orientation layer being arranged below the frame to cover the frame
Data Source
AI summary
A pixel electrode of a liquid crystal display panel is electrically connected to an end of a switch unit of the liquid crystal display panel, and includes: a plurality of branches, which is connected to a frame, each of the branches extending from the frame at a given angle into an interior of the frame; adjacent ones of the branches being sequentially juxtaposed by being spaced by cutoffs; the plurality of branches having tailing ends that define an opening having a configuration of mirror symmetry in the interior of the frame; and an orientation layer being arranged below the frame to cover the frame. Through use of the pixel electrode of the present invention, the liquid crystal display panel shows increased transmittance and improved displaying performance.