Bent Liquid Crystal Display Panel Substrate Compression
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Solution Overview
Problem
The existing methods for bending liquid crystal display panels, which involve simultaneous substrate bending and sealing material hardening or softening, complicate the manufacturing process and can lead to a decrease in the panel's characteristics due to increased distance between substrates and stress-related issues.
Innovation Solution
A liquid crystal display device with a bent panel where pressing members are used to bring the substrates closer together, specifically using non-bent and bent portions of the sealing material, and designed with contact portions and support structures to maintain the panel's characteristics during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a projecting portion is added to the second glass substrate to release compressive stress during bending, then stress release is improved, but the distance between opposing surfaces increases which adversely affects liquid crystal display panel characteristics
Solution Approach 1:
The invention extracts the stress-release function from the glass substrate by introducing a separate projecting portion on the sealing material. This allows the glass substrate to maintain its original flat surface and precise dimensions while the sealing material's projecting portion absorbs and releases compressive stress during bending, preventing stress concentration at the substrate edges.
Solution Approach 2:
The sealing material acts as an intermediary element between the two glass substrates. By incorporating a projecting portion into the sealing material, the invention creates a mediator that handles stress release functionality, allowing the glass substrates to maintain their structural integrity and precise spacing without direct modification.
2Device complexity
If substrate bending and sealing material hardening or softening are performed simultaneously, then the bending process is integrated, but the manufacturing process becomes complicated and device complexity increases
Solution Approach 1:
The invention segments the bending process into distinct stages: first bending the substrate while the sealing material is in a soft state, then hardening the sealing material separately. This segmentation allows each step to be optimized independently, avoiding the complexity of simultaneous processing while achieving the desired bent configuration.
Solution Approach 2:
The sealing material is softened in advance before the bending process, allowing the substrate to be bent easily. After bending is complete, the sealing material is hardened to lock the bent shape. This preliminary softening action simplifies the overall process by enabling separate, optimized steps rather than simultaneous complex operations.
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 prevents the lowering of liquid crystal display device characteristics by maintaining the substrates' proximity and reducing stress, thereby enhancing the panel's performance during bending.
Implementation Method 1
a substrate is bent by heating the substrate at a temperature where a sealing material is softened
Implementation Method 2
a sealing material is hardened by radiating ultraviolet rays to the sealing material
Implementation Method 3
a sealing material is hardened by radiating ultraviolet rays to the sealing material
Implementation Method 4
pressing members which press the first substrate and the second substrate in the direction that the first substrate and the second substrate come closer to each other
Data Source
AI summary
A liquid crystal display device which can prevent lowering of characteristics thereof when a liquid crystal display panel is bent is provided. A liquid crystal display device includes: a bent liquid crystal display panel which includes a first substrate and a second substrate which are fixed to each other by a sealing material, and liquid crystal which is hermetically filled in a space defined between the first substrate and the second substrate; and pressing members which press the first substrate and the second substrate in the direction that the first substrate and the second substrate come closer to each other. The liquid crystal display panel includes a straight line on a surface thereof and is bent along a bent line which surrounds an axis arranged parallel to the straight line. The sealing material includes non-bent portions which extend along the straight line and are not bent, and bent portions which extend along the bent line. The pressing members press the first substrate and the second substrate in regions defined between the non-bent portions of the sealing material and a display region of the liquid crystal display panel.