Curved PDLC Display Panel Alignment for Uniform Luminance
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Solution Overview
Problem
Luminance unevenness occurs in polymer dispersed liquid crystal (PDLC) display devices due to misalignment of liquid crystal molecules relative to the direction of light travel, particularly in display panels with curved or polygonal shapes, leading to inefficiencies and non-uniform display characteristics.
Innovation Solution
Align the liquid crystal molecules along the curved or polygonal shape of the display panel by performing an alignment process on the alignment films in a circumferential direction, ensuring that the alignment direction of the liquid crystal molecules is perpendicular to the light travel direction, thereby maintaining uniform display properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If liquid crystal molecules are aligned in a conventional direction in display panels with curved or polygonal shapes, then the manufacturing process is simple, but luminance unevenness occurs and display uniformity deteriorates
Solution Approach 1:
The alignment direction of liquid crystal molecules is varied according to the local geometry of the display panel. In curved or polygonal shapes, the alignment direction changes to follow the contour at different locations, ensuring uniform light interaction across the entire display surface while maintaining manufacturing feasibility through localized alignment adjustments
Solution Approach 2:
For display panels with curved peripheries, the liquid crystal molecule alignment follows the curved contour of the panel. The alignment direction is adjusted to be perpendicular to the light travel direction at each point along the curve, eliminating luminance unevenness caused by conventional straight-line alignment in curved geometries
2Productivity
If liquid crystal molecules are not aligned perpendicular to light travel direction, then the alignment process is simpler, but luminance unevenness occurs and display efficiency decreases
Solution Approach 1:
The alignment direction parameter of liquid crystal molecules is optimized to be perpendicular to the light travel direction. This parameter change ensures maximum light interaction efficiency and uniform luminance distribution across the display panel, particularly in curved or polygonal configurations where conventional alignment would cause efficiency losses
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 achieves high-efficiency and high-luminance display panels with uniform characteristics by aligning liquid crystal molecules perpendicular to light travel, reducing luminance unevenness and enhancing display quality.
Implementation Method 1
the liquid crystal layer contains liquid crystal molecules and a polymer, and a part of the liquid crystal molecules is aligned along a curve corresponding to the curved portion
Data Source
AI summary
A display device according to an embodiment of the present invention includes a display panel including a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate; and a light source arranged around the display panel, wherein at least a part of a periphery of the display panel has a curved portion in a plan view, the liquid crystal layer contains liquid crystal molecules and a polymer, and part of the liquid crystal molecules are aligned along the curved portion.