Liquid Crystal Display Structure with Dual Buffer Crack Protection
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Solution Overview
Problem
Existing liquid crystal display (LCD) devices face challenges with mechanical strength and durability, particularly due to the vulnerability of inorganic layers in flip panel structures and reduced thickness leading to increased susceptibility to external impacts and stress.
Innovation Solution
Incorporating an organic buffer layer between the substrate and thin film transistor, along with an inorganic buffer layer, to enhance mechanical strength and durability, while minimizing the bezel region by positioning the color filter substrate between the array substrate and the backlight unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the substrate thickness is reduced to minimize bezel width, then the display area is maximized and bezel region is minimized, but the mechanical strength and durability are reduced making the device vulnerable to external impact and stress
Solution Approach 1:
The patent employs a composite structure combining organic buffer layer and inorganic buffer layer between the array substrate and color filter substrate. This composite material approach provides enhanced mechanical strength and durability while maintaining the thin profile necessary for borderless display design, resolving the contradiction between maximizing display area and maintaining mechanical strength.
2Reliability
If inorganic layers are used in flip panel structure, then the display performance is achieved, but the inorganic layers are easily cracked in response to external impact reducing reliability
Solution Approach 1:
The patent introduces an organic buffer layer as an intermediary between the array substrate and the inorganic buffer layer. This organic layer acts as a stress-absorbing intermediary that prevents crack propagation in the inorganic layers when subjected to external impact, thereby improving panel durability while maintaining display performance.
Solution Approach 2:
The dual buffer layer structure (organic and inorganic) serves as a pre-configured protective system that cushions against external impacts before they can cause damage to the panel. The organic buffer layer specifically provides beforehand cushioning by absorbing and distributing impact forces, preventing crack formation in the brittle inorganic layers.
Data Source
AI summary
A liquid crystal display device including a liquid crystal panel including a first substrate, a thin film transistor on the first substrate, an organic buffer layer between the first substrate and the thin film transistor, a second substrate, a color filter layer on the second substrate, and a liquid crystal layer between the first and second substrates, and a backlight unit below the liquid crystal panel. The second substrate is between the backlight unit and the first substrate.