Liquid Crystal Display Light Blocking Member Dams for Seal Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal displays face issues with seal unoccupied areas (SUAs) due to the buildup structure formed by light blocking members and column spacers, which prevent the liquid crystal layer from spreading to the edges, leading to incomplete sealing and reduced display performance.
Innovation Solution
Incorporating dams with strategically positioned openings in the light blocking member, formed using a photo resist process and masks, to allow the liquid crystal layer to spread and fill the seal area, ensuring complete sealing and preventing SUAs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light blocking members and column spacers are formed as a buildup structure to prevent light leakage, then light blocking performance is improved, but liquid crystal layer spreading is prevented causing seal unoccupied areas
Solution Approach 1:
The light blocking member is divided into multiple dams with openings between them. This segmentation allows the liquid crystal layer to flow through the openings and reach the seal area, while the dams themselves continue to provide light blocking functionality. The segmentation resolves the contradiction by enabling both light leakage prevention and complete sealing.
Solution Approach 2:
Different regions of the light blocking member have different properties: the dams provide light blocking, while the openings between dams allow liquid crystal flow. This local differentiation of function enables the structure to simultaneously prevent light leakage in some areas while permitting liquid crystal spreading in other areas, thus achieving both light blocking performance and sealing completeness.
2Object-affected harmful factors
If dams are formed to block light leakage, then contrast ratio is improved, but liquid crystal layer cannot spread to edges creating seal unoccupied areas
Solution Approach 1:
The continuous light blocking structure is segmented into discrete dams with openings. This allows the liquid crystal layer to flow through the openings and extend to the edges of the substrate, achieving complete coverage while the dams maintain their light blocking function to preserve contrast ratio.
Solution Approach 2:
The openings between dams act as intermediaries that facilitate liquid crystal layer spreading. These openings provide pathways for the liquid crystal to flow through the dam structure and reach the seal area, thereby extending the liquid crystal layer's reach without compromising the light blocking capability of the dams.
3Ease of manufacture
If light blocking member is formed as a continuous structure, then manufacturing simplicity is maintained, but liquid crystal layer spreading is blocked
Solution Approach 1:
The light blocking member is segmented into dams with openings, which can be formed using standard photolithography processes. This segmentation approach maintains manufacturing simplicity while significantly improving liquid crystal layer coverage, as the openings provide necessary pathways for liquid crystal flow to the edges.
Solution Approach 2:
The light blocking member incorporates a porous structure with openings between dams. This porous design allows the liquid crystal layer to penetrate through the structure and reach the seal area, achieving complete coverage while the photolithography-based fabrication process maintains ease of manufacture.
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 prevents seal unoccupied areas by allowing the liquid crystal layer to flow through the misaligned openings in the dams, ensuring complete sealing and enhancing the display's contrast ratio and image quality.
Implementation Method 1
the at least one dam is formed using a photo resist process
Implementation Method 2
allowing the liquid crystal layer to flow through the misaligned openings in the dams
Data Source
AI summary
A liquid crystal display includes a display area (DA) in which an image is displayed and a peripheral area (PA) disposed in a vicinity of the DA, a first substrate disposed in the PA and a second substrate facing the first substrate, at least one column spacer part disposed on the first substrate, a light blocking member disposed on the first substrate, a liquid crystal layer disposed between the first substrate and the second substrate, and a seal formed at circumferences of the first and second substrates, the seal coupling the first substrate and the second substrate to each other and confining the liquid crystal layer between the first substrate and the second substrate, wherein the light blocking member includes at least one dam formed therein, the at least one dam being disposed in the PA and including at least one opening part formed therein.