Liquid Crystal Display Panel Slit Electrode Light Leakage
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Solution Overview
Problem
Conventional liquid crystal display panels suffer from light leakage due to an extra electrical field created by scan lines and data lines, resulting in low light transmittance and contrast ratio, especially in white states.
Innovation Solution
The design incorporates pixel electrodes with branch portions and slits that reduce the influence of the extra electrical field by defining zones and minimizing the impact of adjacent scan and data lines, allowing for improved alignment of liquid crystals and reduced light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional pixel electrodes are used without slits, then the electrode structure is simple, but light leakage occurs due to extra electrical fields from scan and data lines
Solution Approach 1:
The pixel electrode is divided into multiple segments by introducing slits, which separate the continuous electrode into isolated regions. This segmentation disrupts the extra electrical field lines generated by scan and data lines, preventing them from causing liquid crystal misalignment and light leakage, while maintaining manufacturing feasibility through standard photolithography processes.
Solution Approach 2:
Slits are strategically positioned at specific locations where extra electrical fields from scan and data lines would otherwise cause harmful effects. The slits are not uniformly distributed but placed locally where needed to block harmful field lines, allowing the electrode to maintain simplicity in non-critical areas while providing protection in critical regions.
2Illumination intensity
If slits are added to the electrode to reduce light leakage, then light transmittance improves, but the electrode structure becomes more complex
Solution Approach 1:
Instead of creating a complex grid pattern or multiple slit layers, the invention uses a partial action approach by introducing only the necessary slits at critical locations where extra electrical fields cause problems. This provides sufficient light leakage prevention without excessive structural complexity, achieving the optimal balance between performance improvement and manufacturing simplicity.
3Area of stationary object
If the electrode is positioned close to scan and data lines, then the pixel area can be maximized, but light leakage increases due to extra electrical fields
Solution Approach 1:
The invention extracts or removes the harmful extra electrical field lines from the pixel area by introducing slits that act as barriers. These slits selectively block the field lines originating from adjacent scan and data lines, allowing the electrode to remain close to these lines for maximum pixel area while preventing the harmful field effects that would otherwise cause light leakage.
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 enhances light transmittance and contrast ratio by minimizing light leakage and dark lines, resulting in improved brightness and image quality across different voltage states.
Implementation Method 1
An electrical field is formed between the electrode 117 and the transparent electrode 123. The electrical field alters the axis of the liquid crystal members 13, thus a color image is formed and displayed on the panel.
Data Source
AI summary
A liquid crystal display panel includes a first substrate, a second substrate opposite to the first substrate, a plurality of scan lines, a plurality of data lines intersecting with the scan lines, a plurality of pixel areas defined by the scan lines and the data lines, and a plurality of electrodes. Each electrode is positioned in a corresponding pixel area. Each pixel area has an inner surface. The electrode includes a branch portion, a frame connected to the branch portion, and a plurality of first slits defined by the frame and the branch portion, away from the inner surface of the pixel area.