Display Panel Alignment Barrier Recess Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display panels face defects due to misalignment of alignment layers and inadequate adhesion between substrates, leading to image stains and display quality issues.
Innovation Solution
The display panel design includes recessed portions on the substrates with alignment barriers to control the alignment layer's position, preventing overcoating or undercoating, and using spacers to maintain distance between substrates, thereby ensuring proper alignment and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the alignment layer is overcoated or not coated enough on the substrate surface, then the alignment quality deteriorates, but adding more coating material or improving coating uniformity increases manufacturing complexity and cost
Solution Approach 1:
The patent introduces a protrusion structure on the substrate surface before coating the alignment layer. This protrusion serves as a physical guide that pre-determines the alignment layer's position and thickness distribution, eliminating the need for complex coating process control. The alignment layer is automatically constrained to the correct region by the protrusion geometry, ensuring uniform coating without requiring advanced coating equipment or processes.
2Manufacturing precision
If the alignment layer position is not precisely controlled, then display quality deteriorates due to stains and misalignment, but implementing precise positioning mechanisms increases device complexity
Solution Approach 1:
The protrusion structure on the substrate surface serves as a self-positioning feature that automatically guides the alignment layer to the correct position during the coating process. The alignment layer naturally conforms to the protrusion geometry, eliminating the need for external positioning mechanisms, masks, or complex alignment systems. The structure self-regulates the alignment layer placement, ensuring precise positioning without adding device complexity.
3Strength
If the alignment layer extends too far onto the substrate, then adhesion between substrates deteriorates, but reducing the alignment layer area compromises alignment functionality
Solution Approach 1:
The patent divides the substrate surface into distinct functional regions using the protrusion structure. The protrusion creates a clear boundary between the region where the alignment layer should be present (on the protrusion) and the region where it should be absent (the recessed area). This segmentation ensures the alignment layer is confined to the appropriate area, maintaining both substrate adhesion and alignment functionality without compromise.
Data Source
AI summary
A display panel includes a first substrate, a second substrate, and a liquid crystal layer disposed between the first and second substrates. The first substrate includes a recess portion recessed into the first substrate from the surface of a common electrode and a first alignment barrier protruded from the recess portion in an area corresponding to at least a portion of an end portion of a first alignment layer.