Wire Grid Polarizer Stitch Line Placement for Display Panels
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Solution Overview
Problem
The manufacturing of large area wire grid polarizers for display panels often results in stitch lines due to manufacturing processes, leading to decreased display quality and visibility issues, particularly with green color filters.
Innovation Solution
A display panel design incorporating a wire grid polarizer with strategically positioned stitch lines that do not overlap green color filters, ensuring the stitch lines are invisible to users while maintaining display quality without precise alignment processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large area wire grid polarizer is manufactured, then the display apparatus achieves larger size and better performance, but stitch lines appear due to manufacturing processes which decrease display quality
Solution Approach 1:
The wire grid polarizer is divided into multiple smaller areas that are manufactured separately and then combined. This segmentation allows each area to be manufactured with high precision using existing manufacturing processes, while the overall polarizer achieves large area coverage. The stitch lines are strategically positioned at boundaries between these segmented areas where they are least visible.
Solution Approach 2:
The patent applies different design considerations to different regions of the wire grid polarizer. Specifically, the stitch lines are positioned to overlap with light blocking parts in certain regions (where visibility is masked) while avoiding regions with color filters (where visibility would be problematic). This local optimization of stitch line placement resolves the contradiction between large area and manufacturing precision.
2Area of stationary object
If stitch lines are present in the wire grid polarizer, then large area manufacturing is enabled, but the stitch lines become visible and degrade display quality
Solution Approach 1:
The light blocking parts serve as intermediaries that mask the visibility of stitch lines. By positioning stitch lines to overlap with light blocking parts, the intermediary structure (light blocking part) hides the harmful effect (visible stitch lines) from the viewer, allowing large area polarizers to be manufactured without degrading display quality.
Solution Approach 2:
The patent strategically positions stitch lines to avoid overlapping with color filters (red, green, blue) where they would be most visible. By using the color characteristics of different filter regions, the stitch lines are placed in areas (light blocking parts) where their visibility is minimized or eliminated, effectively using color distribution patterns to hide the stitch lines.
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 improves display quality by ensuring stitch lines are not visible, particularly for green color filters, without requiring precise alignment of light blocking parts and wire grid polarizers, thus enhancing the display apparatus' performance.
Implementation Method 1
a wire grid polarizer including a first stitch line which is spaced apart from the second opening in a plan view
Data Source
AI summary
A display panel including a plurality of pixels. Each of the pixels includes a light blocking part configured to define a first opening, a second opening, and a third opening, a first color filter which overlaps the first opening, a second color filter which overlaps the second opening and having a green color, a third color filter which overlaps the third opening, and a wire grid polarizer including a first stitch line spaced apart from the second opening in a plan view.