Bendable Display Substrate with Unidirectional Glass Fiber Reinforcement
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Solution Overview
Problem
Bendable display devices face issues with distortion and short circuits due to stress when bent in multiple directions, requiring a solution that enhances flexibility and reliability while maintaining portability and low power consumption.
Innovation Solution
A display device design featuring two flexible substrates with glass fibers extending in one direction, allowing for controlled flexibility and reduced stress concentrations, preventing distortion and short circuits, and incorporating a light-emitting element such as organic EL for efficient power use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display device is made flexible and bendable for portability, then ease of operation and portability are improved, but reliability deteriorates due to stress-induced distortion and short circuits
Solution Approach 1:
The patent divides the substrate into a composite structure with multiple layers including flexible substrate, reinforcement substrate with glass fibers, and protective films. This segmentation allows each layer to perform its specific function: the flexible substrate provides bendability for portability, while the reinforcement substrate with unidirectional glass fibers provides structural strength to prevent stress-induced distortion and short circuits, thus resolving the contradiction between portability and reliability
Solution Approach 2:
The patent employs composite materials by combining flexible substrate materials (such as polyimide or polyester) with reinforcement materials (glass fibers arranged in specific patterns). This composite structure enables the display device to simultaneously achieve flexibility for repeated bending and structural integrity to prevent malfunction, directly addressing the reliability issue while maintaining portability
2Reliability
If reinforcement members are added to improve strength, then reliability is improved, but device complexity and weight increase
Solution Approach 1:
The patent applies local quality by strategically placing glass fibers only in specific regions where stress concentration occurs during bending, rather than uniformly throughout the entire substrate. The glass fibers are arranged in patterns (such as radial, circular, or grid patterns) localized to high-stress areas, providing reinforcement exactly where needed while minimizing additional weight and structural complexity in low-stress regions
3Weight of moving object
If the substrate is made thinner for portability, then weight and volume are reduced, but strength and reliability deteriorate
Solution Approach 1:
The patent uses composite materials with high strength-to-weight ratio, combining thin flexible substrate with strategically placed glass fiber reinforcement. This allows the overall device to remain thin and lightweight while the glass fibers provide the necessary structural strength to prevent breakage and malfunction, resolving the contradiction between weight reduction and reliability maintenance
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
The design achieves a thin, lightweight, and highly reliable display device that can be repeatedly bent without breaking, with improved portability and low power consumption, while maintaining effective light transmission and display quality.
Implementation Method 1
At least one of the two flexible substrates contains a plurality of glass fibers extending in one direction
Implementation Method 2
a light-emitting device, a display device, an electronic device, or a lighting device utilizing electroluminescence (EL)
Data Source
AI summary
A bendable display device, lighting device, or electronic device which is unlikely to be broken when handled. The display device, lighting device, or electronic device includes two flexible substrates, and at least one of the two flexible substrates contains a plurality of glass fibers extending in one direction. Accordingly, the display device, lighting device, or electronic device has low flexibility in the one direction and is unlikely to be broken when handled.