Seal Column Organic Layers Buried in LCD Seal Regions
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Solution Overview
Problem
In liquid crystal display (LCD) devices, the adhesion between the device substrate and the color filter substrate is weakened when the black matrix region is small, leading to reduced binding force due to weak adhesion between the seal and the orientation film, which affects the aperture ratio and brightness.
Innovation Solution
The use of seal column spacers or organic layers with specific dimensions and placement in the seal region, buried within the seal, enhances the adhesion between the substrates by increasing the contact area and strengthening the binding force, even with a smaller black matrix region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the black matrix region is reduced to increase aperture ratio, then brightness is improved, but adhesion between substrates deteriorates
Solution Approach 1:
The invention divides the sealing structure into multiple components: seal columns, organic layers, and orientation films. The seal columns provide structural support and anchoring points, while the organic layers filled between them create additional adhesion interfaces. This segmentation allows the sealing function to be distributed across multiple elements, compensating for the reduced adhesion area caused by smaller black matrix regions.
Solution Approach 2:
The invention applies different materials and structures to different regions: the seal columns are positioned at specific locations to provide localized anchoring, the organic layers are filled in the spaces between seal columns to create continuous adhesion paths, and the orientation film is applied selectively. This local differentiation optimizes adhesion in critical areas while maintaining overall aperture ratio.
2Area of moving object
If the black matrix region is reduced to increase aperture ratio, then the area for seal-adhesion is reduced, but binding force between substrates must be maintained
Solution Approach 1:
The invention transitions from relying solely on two-dimensional planar adhesion between the seal and orientation film to a three-dimensional adhesion system. The organic layers are filled vertically between the seal columns, creating multiple adhesion interfaces at different heights and depths. This dimensional transition compensates for the reduced planar adhesion area.
Solution Approach 2:
The invention uses a composite sealing structure combining inorganic seal columns with organic layers. The seal columns provide structural rigidity and positioning, while the organic layers provide flexible adhesion and stress distribution. This composite approach maintains binding force while accommodating the reduced black matrix area.
Data Source
AI summary
A liquid crystal display (LCD) device having a first substrate and a second substrate, each having a surface opposite to each other and each including a seal region and a liquid crystal region. The first substrate structure having a black matrix on the surface of the first substrate opposite to the second substrate, a color filter next to the black matrix, a first electrode on the color filter, a first orientation film on the first electrode, and a number of seal column spacers on the black matrix. The second substrate structure having a circuit device disposed on the surface of the second substrate opposite to the black matrix, an organic layer disposed on the second substrate opposite to the color filter, a second electrode on the organic layer, and a second orientation film on the second electrode. The seal is in the seal regions between the first substrate structure and the second substrate structure. A liquid crystal layer fills a space between the first substrate structure and the second substrate structure in the liquid crystal region.