Light Guide Plate Enhancement Layer for Flexible Displays
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Solution Overview
Problem
Existing light source devices in displays face challenges with flexibility and durability, particularly in non-planar environments, as they lack sufficient resistance to water, UV, chemicals, and scratches, and often suffer from uneven light distribution and adhesion issues.
Innovation Solution
A light source device comprising a light guide plate with an enhancement layer between the light guide substrate and optical adhesive, which provides UV, water, and chemical resistance, scratch resistance, and self-repair properties, while ensuring uniform light distribution by acting as an intermediary layer between the light source element and the light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate is used to provide uniform light distribution, then light uniformity is improved, but the device becomes rigid and vulnerable to damage in non-planar environments
Solution Approach 1:
The patent introduces an enhancement layer with thickness of 1-25 micrometers that can be formed as a thin film on the light guide substrate. This thin film structure allows the light guide plate to be flexible and resistant to bending damage while still providing the necessary enhancement functions.
Solution Approach 2:
The patent uses composite material structure by combining the light guide substrate with an enhancement layer made of photo-crosslinkable resin. This composite structure provides both the light guiding function and the enhanced durability, flexibility, and resistance properties simultaneously.
2Adaptability or versatility
If the light guide plate is made flexible for non-planar applications, then adaptability is improved, but adhesion between elements deteriorates
Solution Approach 1:
The enhancement layer is implemented as a thin film (1-25 micrometers) that inherently provides flexibility to the light guide plate, enabling non-planar applications while maintaining structural integrity.
Solution Approach 2:
The enhancement layer acts as an intermediary between the light guide substrate and the optical adhesive, providing a bonding interface that maintains strong adhesion even when the overall structure is made flexible for non-planar applications.
3Reliability
If a thick enhancement layer is used to improve resistance properties, then durability is improved, but light distribution uniformity deteriorates
Solution Approach 1:
The enhancement layer is designed as a thin film with specific thickness range (1-25 micrometers) that is sufficient to provide durability, UV resistance, and chemical resistance while remaining thin enough to allow uniform light transmission and distribution.
Solution Approach 2:
The patent optimizes the thickness parameter of the enhancement layer to fall within 1-25 micrometers, and selects materials with appropriate refractive indices (second refractive index between 1.3-1.48, lower than the light guide substrate) to achieve both durability and uniform light distribution simultaneously.
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 solution enhances the durability and light distribution of the light source device, allowing it to be used in flexible and non-planar applications with improved adhesion and resistance properties, maintaining performance even when bent, and providing ideal light emitting and display effects.
Implementation Method 1
a first refractive index of the light guide substrate is greater than a second refractive index of the enhancement layer
Implementation Method 2
a material of the enhancement layer is a photo-crosslinkable resin
Data Source
AI summary
A light source device includes a light guide plate, an optical adhesive, and a light source element. The light guide plate includes a light guide substrate and an enhancement layer. The light guide substrate has a light incident surface, a first surface, and a second surface. The first surface is opposite to the second surface, and the light incident surface extends between the first surface and the second surface. The enhancement layer is disposed on the light guide substrate. A thickness of the enhancement layer is from 1 micrometer to 25 micrometers and a first refractive index of the light guide substrate is greater than a second refractive index of the enhancement layer. The optical adhesive is interposed between the first surface of the light guide substrate and the optical adhesive. The light source element is disposed beside the light incident surface to emit light toward the light incident surface.