FIPEL Backlight with Integrated Light Guide
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Solution Overview
Problem
Current backlight systems for LCD displays are complex, expensive, heavy, and power-inefficient due to their multiple components and air gaps, which hinder the production of a homogeneous light beam.
Innovation Solution
The use of Field-Induced Polymer Electro-Luminescence (FIPEL) technology, which involves a simpler construction with a single or dual dielectric layers on glass substrates coated with ITO and aluminum, utilizing a copolymer emissive layer with Multi-Walled Nano Tubes to emit light efficiently from both surfaces, and micro prisms or lenses to redirect light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LED edge lit panels with multiple components (LED light sources, light guide, reflective devices, back reflectors, diffusor sheets) are used, then light can be emitted and distributed, but the device becomes complex, heavy, and expensive with multiple air gaps that prevent homogeneous light mixing
Solution Approach 1:
The patent combines multiple separate components (light guide, reflective devices, diffusor sheets, back reflectors) into a single integrated light guide panel with built-in light redirecting structures. This merging eliminates the need for multiple separate sheets and air gaps, reducing device complexity while maintaining homogeneous light distribution through integrated micro-prism and micro-lens structures.
Solution Approach 2:
The integrated light guide panel performs multiple functions simultaneously: it guides light from LED sources, redirects light through built-in micro-prisms and micro-lenses, diffuses light to eliminate banding, and reflects light from the back surface. This multi-functionality reduces the overall component count while maintaining light quality.
2Illumination intensity
If multiple sheets and films with air gaps are used to mix and redirect light, then light homogeneity is improved, but the overall panel thickness and weight increase
Solution Approach 1:
The patent integrates light redirecting structures (micro-prisms and micro-lenses) directly into the light guide panel itself, eliminating the need for separate diffusor sheets and redirecting films. This integration maintains light homogeneity while significantly reducing the overall panel thickness by removing multiple air gaps and intermediate layers.
3Reliability
If multiple individual components are assembled together, then light can be effectively managed, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent integrates light managing functions directly into the light guide panel manufacturing process, forming micro-prisms and micro-lenses during panel fabrication. This eliminates the need for separate assembly steps for reflective devices, diffusor sheets, and back reflectors, significantly reducing assembly complexity and manufacturing cost while maintaining light management effectiveness.
4Illumination intensity
If traditional LED backlight panels with multiple layers are used, then light can be distributed across the display, but the overall device weight increases
Solution Approach 1:
The patent combines multiple heavy components (light guide, reflective devices, back reflectors, diffusor sheets) into a single integrated light guide panel with built-in light redirecting structures. This integration maintains effective light distribution across the display while significantly reducing the overall panel weight by eliminating redundant materials and air gaps.
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 approach results in a thinner, lighter, and more power-efficient backlight system with enhanced light efficiency and the ability to beam form and focus light, reducing the need for multiple components and air gaps.
Implementation Method 1
Field-Induced Polymer Electro-Luminescence (FIPEL) technology, which involves a simpler construction with a single or dual dielectric layers, a conductive substrate with ITO coating, and a polymer emissive layer with Multi-Walled Nano Tubes, to produce a lightweight, efficient, and cost-effective backlighting system that emits light from both surfaces
Data Source
AI summary
A display system, having an emissive body, emitting light over a complete surface as part of a display system. The emissive body can be a FIPEL type device with a first transparent conductive coating over a light emitting substrate. A transparent substrate, has first and second surfaces, with the first surface coupled to the first transparent conductive coating, and the second surface of the transparent substrate including a surface formed with plural light channeling structures thereon.