Display Layer Alignment with Reference Pattern Vision Inspection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display apparatuses face challenges in accurately aligning the optical functional layer and polarization layer during manufacturing, which can affect display quality and efficiency.
Innovation Solution
Incorporation of a reference pattern aligned with the edge of the optical functional layer, which can be recognized by a vision inspection system to determine the alignment state of the optical functional layer relative to the polarization layer, allowing for corrective processing or recycling of misaligned panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection methods are used to check alignment of optical functional layer and polarization layer, then inspection can be performed, but alignment precision is insufficient and cannot detect sub-pixel level misalignments
Solution Approach 1:
A reference pattern is introduced as an intermediary element between the optical functional layer and the inspection system. This reference pattern serves as a mediator that translates the alignment state into a detectable form, enabling precise measurement of sub-pixel level misalignments that would otherwise be undetectable by direct visual inspection methods
Solution Approach 2:
The reference pattern creates a copied or representative indication of the alignment state through moire patterns. By detecting the moire pattern formed between the reference pattern and the optical functional layer, the system indirectly measures alignment precision without requiring direct observation of the actual layer boundaries
2Ease of manufacture
If alignment tolerance is relaxed to simplify manufacturing, then manufacturing ease improves, but display quality deteriorates due to visible misalignment
Solution Approach 1:
The reference pattern is prepared in advance on the optical functional layer before final assembly. This preliminary placement of the reference pattern enables subsequent precise alignment verification, allowing manufacturers to maintain tight alignment tolerances for high display quality while having an automated inspection system to verify compliance rather than relying solely on manual precision
Solution Approach 2:
The moire pattern detection system provides feedback on the actual alignment state of the optical functional layer relative to the polarization layer. This feedback mechanism enables real-time or post-manufacturing verification of alignment quality, allowing defective panels to be identified and sorted, thereby ensuring display quality standards are met despite variations in manufacturing precision
3Measurement precision
If automated inspection systems are implemented to improve alignment detection, then measurement precision improves, but device complexity and cost increase
Solution Approach 1:
The inspection system replaces complex mechanical alignment measurement devices with an optical-based moire pattern detection system. By using optical imaging and pattern recognition algorithms, the system achieves sub-pixel level measurement precision without requiring sophisticated mechanical measurement equipment, thereby reducing overall system complexity while maintaining high measurement accuracy
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
Enhances the precision of alignment between the optical functional layer and polarization layer, improving display quality and efficiency by ensuring accurate positioning and identifying misalignments for corrective action.
Implementation Method 1
a sensing device configured to generates image data about an upper surface of a display panel
Implementation Method 2
a computing device configured to receive the image data, recognize the reference pattern from the image data, and based on the reference pattern, obtain alignment state information
Data Source
AI summary
A display apparatus includes a pixel circuit layer, a polarization layer disposed on the pixel circuit layer, an optical functional layer disposed on the polarization layer, and a reference pattern aligned with an edge of the optical functional layer.