LCD Light Shielding Aperture Prevents Alignment Solution Infiltration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The permeation of alignment solution into the sealing portion area of liquid crystal display (LCD) devices leads to contamination, reduced adhesion between substrates, and obstruction of electric connections, resulting in gaps and diminished performance.
Innovation Solution
Incorporating a light shielding portion with a closed curved aperture and aperture covering portion, including multiple covering patterns of different materials, to prevent alignment solution infiltration and ensure proper sealing and electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If alignment solution is coated over the substrate to form alignment layer, then initial alignment direction of liquid crystals is determined, but alignment solution infiltrates into sealing portion area causing contamination and adhesion loss
Solution Approach 1:
The patent introduces a light shielding portion with a first aperture that divides the substrate area into a display area and a non-display area. This segmentation prevents the alignment solution from infiltrating into the sealing portion area while still allowing the alignment layer to be formed in the display area. The aperture acts as a barrier that segments the coating path of the alignment solution.
Solution Approach 2:
The light shielding portion serves as an intermediary structure between the display area and the sealing portion. It includes a first aperture that controls the flow of alignment solution, allowing it to pass through in the display area while blocking infiltration into the sealing portion area. This intermediary structure resolves the contradiction by mediating the alignment solution's path.
2Reliability
If alignment solution infiltrates into sealing portion area, then alignment layer is formed in sealing area, but gap defect occurs and adhesion between substrates is diminished
Solution Approach 1:
The light shielding portion with first aperture segments the substrate into distinct functional areas, preventing alignment solution from reaching the sealing portion area. This segmentation ensures that the alignment layer is formed only in the display area, maintaining the integrity of the sealing portion and preventing gap defects.
Solution Approach 2:
The light shielding portion is introduced as a preliminary measure to prevent alignment solution infiltration into the sealing portion area before the contamination can occur. By blocking the path of the alignment solution in advance, the patent prevents the formation of alignment layer in the sealing area, thereby preventing subsequent adhesion loss and gap defects.
3Ease of manufacture
If alignment solution is coated over sealing portion area, then coverage is complete, but electric connection between common line and common electrode is obstructed
Solution Approach 1:
The light shielding portion with first aperture segments the coating area, allowing alignment solution to be coated in the display area while blocking the sealing portion area. This segmentation ensures that the electric connection between the common line and common electrode is not obstructed by alignment solution infiltration.
Solution Approach 2:
The light shielding portion acts as an intermediary that controls the coating process. It allows the alignment solution to pass through the first aperture to coat the display area while blocking the sealing portion area, thereby preventing obstruction of the electric connection without compromising the coating effectiveness in the display area.
Data Source
AI summary
A liquid crystal display (“LCD”) device includes a first substrate and a second substrate each having a display area and a non-display area, a liquid crystal layer between the first substrate and the second substrate, a sealing portion in the non-display area, and a light shielding portion having a first aperture between the display area and the sealing portion.