Front Light Module Micro-Structure Refraction
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Solution Overview
Problem
The technology of full lamination in reflective display screen products, such as tablet computers and e-books, faces challenges in improving image contrast and brightness.
Innovation Solution
A front light module with a micro-structured front light guide plate, a transparent medium with a refractive index between 1.1 and 1.9, and a cover layer, along with adhesive layers, is used to enhance light refraction and reflection, increasing the light entering the reflective display device and improving light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If full lamination is used in reflective display screen products, then the device structure is simplified and manufacturing is easier, but the image contrast and brightness are insufficient
Solution Approach 1:
The patent introduces a transparent medium with specifically controlled refractive index (1.3≤n≤1.9) positioned between the front light guide plate and cover layer. This parameter change in refractive index optimizes light extraction efficiency, thereby improving brightness while preserving the full lamination structure for ease of manufacture.
Solution Approach 2:
The patent designs the transparent medium with a convex shape having a curved surface facing the cover layer. This curvature structure enhances light extraction by refracting light at multiple angles, improving brightness without complicating the manufacturing process.
2Ease of manufacture
If full lamination is used in reflective display screen products, then the device structure is simplified and manufacturing is easier, but the image contrast is insufficient
Solution Approach 1:
The patent introduces a transparent medium with specifically controlled refractive index (1.3≤n≤1.9) positioned between the front light guide plate and cover layer. This parameter change in refractive index optimizes light extraction efficiency, thereby improving brightness while preserving the full lamination structure for ease of manufacture.
Solution Approach 2:
The patent designs the transparent medium with a convex shape having a curved surface facing the cover layer. This curvature structure enhances light extraction by refracting light at multiple angles, improving brightness without complicating the manufacturing process.
3Illumination intensity
If a transparent medium with optimized refractive index is introduced, then light extraction efficiency and brightness are improved, but the device structure becomes more complex
Solution Approach 1:
The patent integrates the transparent medium directly into the existing full lamination structure between the front light guide plate and cover layer. This merging approach adds the optical enhancement function without creating a separate complex subsystem, thereby improving brightness while minimizing device complexity.
Solution Approach 2:
The transparent medium serves multiple functions simultaneously: it acts as an optical element for light extraction enhancement, a structural component of the lamination stack, and a refractive index control element. This multi-functionality reduces the need for additional components, keeping device complexity low.
4Illumination intensity
If a transparent medium with optimized refractive index is introduced, then light extraction efficiency and brightness are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent integrates the transparent medium directly into the existing full lamination structure between the front light guide plate and cover layer. This merging approach adds the optical enhancement function without creating a separate complex subsystem, thereby improving brightness while minimizing device complexity.
Solution Approach 2:
The transparent medium serves multiple functions simultaneously: it acts as an optical element for light extraction enhancement, a structural component of the lamination stack, and a refractive index control element. This multi-functionality reduces the need for additional components, keeping device complexity low.
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 increases the image contrast ratio by refracting and reflecting light through micro-structures and improves brightness by optimizing light extraction, achieving a contrast ratio of up to 7.
Implementation Method 1
the light emitted by the light-emitting unit can be refracted and reflective through the micro-structure in the front light guide plate
Implementation Method 2
the probability of the light emitted by the light-emitting unit being totally reflected in the front light module increases
Implementation Method 3
A refractive index of the transparent medium is in a range between 1.1 and 1.9
Data Source
AI summary
A front light module applied to full lamination includes a display, a front light guide plate, a light-emitting unit, a transparent medium, and a cover layer. The front light guide plate is located over the display and includes a micro-structure. The micro-structure is recessed from an upper surface of the front light guide plate. The light-emitting unit is adjacent to the front light guide plate. The transparent medium is located over the front light guide plate. A space is located between the front light guide plate and the transparent medium. The cover layer is located over the transparent medium.