UV Blocking Portion for LCD Organic Film Protection
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Solution Overview
Problem
Liquid crystal display devices face issues with organic film damage due to ultraviolet light used for sealing, leading to increased moisture infiltration and screen stains, as the ultraviolet radiation breaks the contiguous structure of the organic film.
Innovation Solution
Incorporating an ultraviolet light blocking portion adjacent to the interconnection portion and made from the same material as the storage electrodes, with a higher haze value than the storage electrodes, to minimize exposure of the organic film to UV light during the sealing process, and forming a sealing member that overlaps the interconnection portion to prevent UV radiation from reaching the organic film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultraviolet light is used to harden the sealing member, then the sealing member is properly formed and bonded, but the organic film is damaged and its contiguous structure is broken
Solution Approach 1:
A light blocking portion is introduced as an intermediary element between the ultraviolet light source and the organic film. This light blocking portion selectively absorbs or blocks ultraviolet light while allowing visible light to pass through, thereby protecting the organic film from UV damage during the sealing member hardening process without interfering with the overall display function
Solution Approach 2:
The light blocking portion is segmented into specific regions adjacent to the interconnection portion, rather than covering the entire display area. This segmented approach blocks UV light only where the sealing member is applied, preserving the transparency and light transmission properties of the organic film in the display regions while still providing protection where needed
2Object-affected harmful factors
If the sealing member is positioned to overlap the interconnection portion, then UV light is blocked from reaching the organic film, but the structural complexity increases
Solution Approach 1:
The light blocking portion is merged with the interconnection portion structure, sharing the same substrate and integration layer. This merging approach allows the light blocking function to be achieved without adding separate complex structural elements, as the light blocking portion utilizes the existing interconnection portion geometry and supporting infrastructure
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 solution effectively reduces organic film defects and minimizes moisture infiltration, thereby preventing stains on the display screen by blocking ultraviolet light and ensuring the integrity of the organic film during the UV hardening of the sealing member.
Implementation Method 1
an ultraviolet light blocking portion adjacent to both sides of the interconnection portion
Implementation Method 2
The sealing member is hardened, for example, by a light source such as ultraviolet light
Data Source
AI summary
A liquid crystal display device and a method of manufacturing the liquid crystal display device are provided. The liquid crystal display device includes: a first substrate, a second substrate opposing the first substrate, an interconnection portion on the first substrate, an ultraviolet light blocking portion adjacent to both sides of the interconnection portion, an organic film on the first substrate and covering the interconnection portion and the ultraviolet light blocking portion, a liquid crystal layer between the organic film and the second substrate, and a sealing member overlapping the interconnection portion and surrounding the liquid crystal layer between the organic film and the second substrate. The liquid crystal display device reduces or minimizes organic film defects caused by radiating ultraviolet light to form the sealing member.