Pixel Electrode Angles for LCD Whitening Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large-sized liquid crystal display panels face issues with whitening phenomena when viewed from the side due to optical path differences, which affect transmittance and viewing angle performance.
Innovation Solution
A pixel structure design featuring main electrodes and branch electrodes with specific acute intersecting angles, where the first angle is 45 degrees and the second angle is greater than or equal to 40 degrees but less than 45 degrees, arranged in a cross-shaped configuration to divide the pixel structure into domains with parallel and non-parallel branch electrodes, improving the alignment of liquid crystals and reducing whitening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the ITO electrode is set at 45 degrees to maximize transmittance in PSVA liquid crystal panels, then transmittance is improved, but whitening occurs in side view due to larger optical path difference
Solution Approach 1:
The pixel electrode is divided into multiple domains (first domain, second domain, third domain, fourth domain) with different ITO electrode angle settings. Two adjacent domains use 45-degree angles while the other two domains use non-45-degree angles, segmenting the uniform structure into differentiated regions that balance transmittance and viewing angle performance
Solution Approach 2:
Different regions of the pixel electrode are assigned different ITO electrode angles according to their specific functional requirements. The local angle configuration optimizes each domain's contribution to either transmittance or viewing angle characteristics, creating a heterogeneous electrode structure within the pixel
2Object-affected harmful factors
If the ITO electrode angle is changed to reduce whitening in side view, then viewing angle performance is improved, but transmittance decreases
Solution Approach 1:
The pixel electrode is divided into multiple domains (first domain, second domain, third domain, fourth domain) with different ITO electrode angle settings. Two adjacent domains use 45-degree angles while the other two domains use non-45-degree angles, segmenting the uniform structure into differentiated regions that balance transmittance and viewing angle performance
Solution Approach 2:
The pixel electrode structure employs asymmetric angle configuration where not all domains use the same ITO electrode angle. Specifically, two domains use 45 degrees while the other two use different angles, creating an asymmetric pattern that balances optical performance across different viewing directions
Data Source
AI summary
The invention discloses a pixel structure and a pixel unit. The pixel structure includes a main electrode; and a plurality of branch electrodes connected to the main electrode; wherein the branch electrode includes a first branch electrode and a second branch electrode, an acute intersecting angle between the first branch electrode and the main electrode is a first angle, and an acute intersecting angle between the second branch electrode and the main electrode is a second angle. The invention solves the whitening phenomenon which occurs in the side view by designing the acute intersecting angle between the branch electrode and the main electrode as the first angle and the second angle.