Color Filter Array Panel Ion Barrier Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal display (LCD) devices, the contamination of the alignment layer due to ion dispersion from the color filter and alignment layer irregularities leads to a deterioration in display quality, particularly when the overcoat thickness is thin, causing irregular alignment of liquid crystal molecules.
Innovation Solution
A color filter array panel design featuring an inorganic layer between overlapping color filters and an organic layer on top, where the organic layer has varying thicknesses to prevent potassium ion dispersion, and an inorganic layer is strategically placed between the color filter overlapped portion and the organic layer to reduce ion contamination of the alignment layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the overcoat thickness is reduced to improve display resolution and reduce light leakage, then the display quality improves, but ion dispersion from the color filter increases causing contamination of the alignment layer
Solution Approach 1:
An inorganic layer is introduced as an intermediary barrier between the color filter and the alignment layer. This inorganic layer specifically blocks potassium ions dispersed from the color filter from reaching and contaminating the alignment layer, while allowing the overcoat to maintain its reduced thickness for improved display quality.
Solution Approach 2:
The patent uses a composite structure combining organic overcoat material with an inorganic barrier layer. This composite approach allows the organic layer to provide optical properties and the inorganic layer to provide ion blocking functionality, solving both the display quality and ion contamination issues simultaneously.
2Illumination intensity
If the overcoat thickness is reduced to minimize light leakage, then light transmittance improves, but the structural integrity and protection against ion dispersion deteriorates
Solution Approach 1:
The patent creates a composite protective structure where the organic overcoat provides optical properties for light transmittance while the integrated inorganic layer provides reliable protection against ion dispersion. This composite design allows thin overall thickness for good light transmission while maintaining reliability through the inorganic barrier.
Solution Approach 2:
The protective structure is segmented into functional layers: the organic overcoat handles optical requirements and the inorganic layer handles ion protection. This segmentation allows each layer to be optimized for its specific function, with the inorganic layer providing reliable ion blocking even when the total thickness is reduced for light transmittance.
3Object-affected harmful factors
If the inorganic layer is added between the color filter and organic layer to block ions, then ion contamination is prevented, but the device complexity and manufacturing steps increase
Solution Approach 1:
The inorganic layer is applied locally only in the color filter region where ion dispersion occurs, rather than uniformly across the entire display. This localized approach prevents ion contamination at the critical interface while minimizing the increase in overall device complexity and manufacturing complexity.
Solution Approach 2:
The inorganic layer formation is merged with the existing overcoat formation process, where the inorganic layer is deposited first and then the organic overcoat is formed on top in a integrated manufacturing sequence. This merging reduces the overall process complexity compared to adding completely separate manufacturing steps.
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
This configuration effectively reduces ion dispersion to the alignment layer, maintaining the initial alignment of liquid crystal molecules and enhancing the display quality by preventing contamination and light transmittance deterioration.
Implementation Method 1
an inorganic layer is strategically placed between the color filter overlapped portion and the organic layer to reduce ion contamination of the alignment layer
Implementation Method 2
the organic layer has varying thicknesses to prevent potassium ion dispersion
Data Source
AI summary
A color filter array panel and a display device including the same are provided. The color filter array panel includes a substrate; a first pixel and a second pixel disposed adjacent to each other; a data line disposed on the substrate and between the first pixel and the second pixel; a first color filter disposed in the first pixel; a second color filter disposed in the second pixel, the first color filter and the second color filter overlap each other to form a color filter overlapped portion overlapping the data line; an inorganic layer disposed on the color filter overlapped portion; an organic layer disposed on the inorganic layer, the first color filter, and the second color filter; and a first pixel electrode disposed in the first pixel; and a second pixel electrode disposed in the second pixel The inorganic layer is disposed between the first pixel electrode and the second pixel electrode.