LCD Panel Spacer Alignment Pattern for Light Leakage
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Solution Overview
Problem
Conventional transflective MVA LCD panels suffer from light leakage issues in the dark-state due to ball spacers or photo spacers, which decrease the contrast ratio and require careful positioning to minimize aperture ratio reduction.
Innovation Solution
The LCD panel design incorporates spacers with alignment functions between substrates, allowing them to serve as spacers and maintain cell-gap without additional spacers, thereby increasing the aperture ratio and ensuring equal effective display areas across sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ball spacers or photo spacers are used to maintain cell-gap, then the cell-gap can be maintained, but light leakage occurs in dark-state and aperture ratio decreases
Solution Approach 1:
The patent combines the spacer function and alignment pattern function into a single integrated structure. The alignment pattern is formed with a spacer layer, creating a unified component that simultaneously maintains cell-gap and provides liquid crystal alignment, eliminating the need for separate ball spacers or photo spacers and thereby preventing light leakage in dark-state
Solution Approach 2:
The alignment pattern structure is designed to perform multiple functions: it serves as both the alignment pattern for liquid crystal orientation and as the spacer for maintaining cell-gap. This multi-functional design eliminates the need for additional dedicated spacer components that would cause light leakage issues
2Object-generated harmful factors
If photo spacers are positioned on data line to avoid light leakage, then light leakage is reduced, but aperture ratio is decreased due to stage requirement
Solution Approach 1:
By merging the spacer function into the alignment pattern structure, the patent eliminates the need for separate stage structures required for photo spacer positioning. The alignment pattern itself provides the spacer function, removing the need for additional area allocation for stages and thereby improving aperture ratio
3Adaptability or versatility
If alignment protrusions are disposed between reflective electrode and transmissive electrode, then wide viewing angle is achieved, but the structure becomes more complex
Solution Approach 1:
The patent merges the alignment protrusions with the spacer structure, creating a unified alignment pattern that serves both as the structural spacer and as the alignment element. This integration reduces the number of separate components and simplifies the overall structure while maintaining the multi-domain alignment capability for wide viewing angle
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 design enhances display quality by eliminating light leakage and maintaining high contrast ratios while optimizing aperture ratios, resulting in improved optical representation and viewing angles.
Implementation Method 1
the alignment protrusions P can change the distribution of electric lines to make the liquid crystals LC tilt towards the alignment protrusions P
Implementation Method 2
a liquid crystal layer LC is disposed between the first substrate 210 and the second substrate 220
Data Source
AI summary
An LCD panel including a first substrate, a second substrate disposed above the first substrate, a plurality of signal lines disposed on the first substrate, and a plurality of sub-pixel sets arranged between the first substrate and the second substrate. Each sub-pixel set includes a plurality of sub-pixels electrically connected to the signal lines, each sub-pixel set has a spacer disposed between the first substrate and the second substrate, and each spacer form a region in each corresponding sub-pixel set, wherein the area of the sub-pixel with the region is substantially greater than the area of other sub-pixels, and the effective display area of the sub-pixel with the region is substantially equal to the effective display area of other sub-pixels.