Pixel Structure Arc Loci Protrudent Patterns for Transflective LCD
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Solution Overview
Problem
Conventional transflective LCD panels with irregularly arranged protrudent patterns have limited reflectivity and non-uniform display viewing angles, requiring improvement in both reflectivity and viewing angle uniformity.
Innovation Solution
A pixel structure with regularly arranged protrudent patterns forming arc loci around a common arc center, occupying 18% to 25% of the display area, is used, along with a half-tone mask patterning process to simplify fabrication and improve reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If two photo-mask processes and two photolithography processes are used to form protrudent patterns, then the protrudent patterns can be formed, but the fabrication time is elongated
Solution Approach 1:
The patent combines two separate photo-mask processes and two photolithography processes into a single integrated process. The protrudent patterns are formed directly during the pixel electrode formation step using one photo-mask and one photolithography process, eliminating the need for separate bump formation processes and subsequent smoothing operations.
Solution Approach 2:
The photo-mask used in the pixel electrode formation process serves multiple functions: it defines both the pixel electrode pattern and the protrudent pattern positions simultaneously. This multi-functional approach allows one process to accomplish what previously required separate dedicated processes.
2Ease of manufacture
If protrudent patterns are irregularly arranged in the reflective area, then fabrication is simplified, but the reflectivity improvement is limited
Solution Approach 1:
The patent employs an asymmetric arrangement where protrudent patterns are positioned at specific locations within each pixel (such as corners or edges) rather than being uniformly or irregularly distributed. This asymmetric positioning optimizes light reflection paths to enhance overall reflectivity while maintaining fabrication simplicity through direct patterning.
Solution Approach 2:
Instead of uniform distribution, the protrudent patterns are strategically placed at specific local positions within the pixel structure. This local quality approach ensures that reflection is optimized at critical locations where it most impacts display performance, achieving higher reflectivity without complex fabrication.
3Ease of manufacture
If conventional pixel structure with irregularly arranged protrudent patterns is used, then fabrication is simpler, but the display viewing angle uniformity is poor
Solution Approach 1:
The asymmetric positioning of protrudent patterns at specific locations within pixels creates balanced light reflection characteristics across different viewing directions. This asymmetric design compensates for viewing angle deviations and achieves uniform display characteristics from multiple angles while maintaining simple fabrication processes.
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 enhances reflectivity and achieves uniform display viewing angles, providing a better reflective display effect and simplifying the fabrication process.
Implementation Method 1
a pixel structure... having protrudent patterns... may provide a good reflectivity
Data Source
AI summary
A pixel structure disposed on a substrate having a plurality of protrudent patterns is provided. An area where the protrudent patterns are disposed defines a first display area. The arrangement of the protrudent patterns forms a plurality of arc loci. The arc loci have a same arc center disposed at a corner of the first display area. The abovementioned protrudent patterns avails improvement of a displaying effect of the pixel structure.