Pixel Electrode Branch Structure for Liquid Crystal Orientation Control
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Solution Overview
Problem
Liquid crystal display devices face issues with transmittance and display quality due to uncontrolled liquid crystal molecule orientation, leading to gray or black spots and reduced brightness, especially at wide viewing angles.
Innovation Solution
The design incorporates specific pixel electrode configurations with branch electrodes and connection electrodes, along with a light-blocking portion, to control liquid crystal molecule orientation and minimize texture formation, thereby improving transmittance and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fine slit defining a plurality of domains is formed in a pixel electrode to realize a wide viewing angle, then viewing angle is improved, but some liquid crystal molecules are not controlled by fringe field and are not oriented at predetermined angle, leading to gray or black spots and deterioration in transmittance
Solution Approach 1:
The pixel electrode is divided into multiple domains by fine slits, with each domain having independently controlled branch electrodes. This segmentation allows separate control of liquid crystal molecules in different regions, enabling wide viewing angle while maintaining proper orientation control in each domain to prevent gray or black spots
Solution Approach 2:
Different regions of the pixel electrode are assigned different functions: the first electrode and its branch electrodes control liquid crystal orientation in specific areas, while connection electrodes provide electrical connectivity. This local differentiation ensures that each region contributes optimally to both viewing angle and transmittance
2Reliability
If branch electrodes are extended from sides of the first electrode away from the connection electrode, then liquid crystal molecule orientation is improved, but the electrode structure becomes more complex
Solution Approach 1:
The electrode structure is segmented into functional components: first electrode for orientation control, branch electrodes for extending control to domain regions, and connection electrodes for electrical connection. This segmentation achieves reliable liquid crystal orientation while maintaining manufacturing feasibility through clear functional division
Solution Approach 2:
The electrode structure performs multiple functions: the first electrode controls overall orientation, branch electrodes extend control to specific domains, and connection electrodes provide electrical connectivity. This multi-functionality reduces the need for separate components, balancing complexity with performance
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 enhances the brightness ratio and display quality by controlling liquid crystal molecule orientation, reducing the visibility of textures and maintaining high brightness across pixels.
Implementation Method 1
If a voltage is applied to an electrode of the liquid crystal display panel, an electric field is produced in the liquid crystal layer. Such an electric field is used to control an orientation of liquid crystal molecules in the liquid crystal layer and a polarization of an incident light
Implementation Method 2
Such an electric field is used to control an orientation of liquid crystal molecules in the liquid crystal layer and a polarization of an incident light, and this process is used to display an image on the liquid crystal display device
Data Source
AI summary
A display device may include a display panel including a first pixel and a second pixel. The first pixel may include a first pixel electrode and a first pixel circuit, and the second pixel may be disposed adjacent to the first pixel and may include a second pixel electrode and a second pixel circuit. The first pixel electrode may include a first electrode including a first side and a second side extending in a first direction, a first connection electrode connected to the first electrode and electrically connected to the first pixel circuit, first branch electrodes extended from the first side in a second direction away from the first connection electrode, and second branch electrodes extended from the second side in a third direction away from the first connection electrode.