FIPEL Backlight for LCD Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LCD display panels require complex edge lit backlight systems with light guides, diffusers, and air gaps to achieve even and homogeneous light, which increases thickness and complexity, and may result in light distortions.
Innovation Solution
The use of Field-Induced Polymer Electro-Luminescence (FIPEL) technology eliminates the need for light guides and diffusers by directly emitting light from a thin, simple panel structure, reducing parts count and thickness, and integrating polarization films for improved light uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If edge lit backlight systems with light guides and diffusers are used, then light uniformity is improved, but panel thickness increases
Solution Approach 1:
The patent extracts and removes the light guide and diffuser components from the backlight system, replacing them with a reflective back surface that directly reflects LED light through the LCD panel. This elimination of intermediate components reduces panel thickness while maintaining light uniformity through the reflective properties of the back surface.
Solution Approach 2:
Instead of using diffusers to scatter light forward, the patent inverts the approach by using a reflective back surface to reflect light backward through the panel. This inversion of the light path strategy achieves uniform illumination without requiring thick diffusing layers.
2Illumination intensity
If light guides with reflective films and structures are added, then light distribution is improved, but device complexity increases
Solution Approach 1:
The patent removes complex reflective films, prisms, and lens structures from the light guide system. Instead, it uses a simple reflective back surface that achieves adequate light distribution without these additional complex components, thereby reducing device complexity.
Solution Approach 2:
The patent merges the reflective function into the back surface of the light guide panel itself, eliminating the need for separate reflective films and structures. This consolidation reduces the number of components and simplifies the overall device structure.
3Illumination intensity
If air gaps are introduced between components, then light mixing is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent removes the air gaps between the light guide panel and diffuser, and between the diffuser and LCD panel. By eliminating these gaps, the system reduces the precision requirements for component alignment and assembly while still achieving adequate light mixing through the simplified reflective structure.
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
FIPEL technology provides a thinner, more efficient backlighting solution with reduced components, eliminating distortions and simplifying manufacturing, while maintaining even light distribution and polarization for enhanced display performance.
Implementation Method 1
Field-Induced Polymer Electro-Luminescence (FIPEL) technology eliminates the need for light guides and diffusers by directly emitting light from a thin, simple panel structure
Implementation Method 2
The polarizer is composed of one or more films that contain very specific polarization properties. If the light entering the gate is polarized, then the light entering the LCD gate will be less attenuated.
Data Source
AI summary
A FIPEL device used as an illuminating part for a display.