LCD Orientation Film Protrusions for Sealant Adhesion
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Solution Overview
Problem
In liquid crystal display (LCD) devices, the poor adherence between substrates due to the non-adherent nature of polyamide orientation films and epoxy resin sealants leads to issues like polarizing plate detachment, which can narrow the display region when strategies to improve adherence, such as overlapping the sealant with orientation films, result in reduced display width.
Innovation Solution
The implementation of a displaying apparatus with substrates having orientation films with protrusions and a sealant that overlaps these protrusions in some areas, while not overlapping in others, enhances adherence between substrates without narrowing the display region by varying the width of the outer black matrix, ensuring strong adhesion in critical areas and maintaining a wider display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealant is formed on the orientation film to improve adherence, then substrate adherence is improved, but the display region is narrowed
Solution Approach 1:
The orientation film is designed with different surface properties in different regions: the peripheral region has protrusions that enhance sealant adhesion, while the central region maintains a smooth surface for optimal liquid crystal display performance. This local differentiation allows the sealant to adhere strongly to the periphery without compromising the display region area.
Solution Approach 2:
The invention introduces a vertical dimension by forming protrusions on the orientation film surface. These protrusions create additional contact points and surface area for the sealant to adhere to, effectively increasing adhesion in the vertical dimension rather than requiring horizontal expansion that would narrow the display region.
2Reliability
If the sealant overlaps the orientation films along the lengthwise direction to improve adherence, then substrate adherence is improved, but the display region width is reduced
Solution Approach 1:
The orientation film is designed with different surface properties in different regions: the peripheral region has protrusions that enhance sealant adhesion, while the central region maintains a smooth surface for optimal liquid crystal display performance. This local differentiation allows the sealant to adhere strongly to the periphery without compromising the display region area.
Solution Approach 2:
The invention introduces a vertical dimension by forming protrusions on the orientation film surface. These protrusions create additional contact points and surface area for the sealant to adhere to, effectively increasing adhesion in the vertical dimension rather than requiring horizontal expansion that would narrow the display region.
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 ensures excellent substrate adherence, preventing display region narrowing and allowing for effective attachment and detachment of polarizing plates without disengaging the sealant, thus maintaining a larger display area.
Implementation Method 1
a sealant having at least a part overlapped with circumferential regions of the orientation films, the sealant adhering the first substrate to the second substrate
Data Source
AI summary
A displaying apparatus includes a first substrate having a first orientation film, a second substrate having a second orientation film corresponding to the first orientation film, oppositely facing the first substrate, and a sealant having at least a part overlapped with circumferential regions of the orientation films, the sealant adhering the first substrate to the second substrate, wherein, in one exemplary embodiment, the circumferential regions of the orientation films overlapped with the sealant are formed with protrusions along planar directions of the substrates, thus providing a displaying apparatus having an excellent adherence between substrates and preventing a display region from being narrowed.