Light Converting Element Gloss Gradient for Backlight Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current white light emitting diodes in backlight modules for LCD devices have low color purity, complex structures, and high manufacturing costs, limiting the conversion efficiency of photoluminescent materials.
Innovation Solution
The surface gloss of the light converting element is modified, with a lower gloss on the incident surface and a higher gloss on the emitting surface, optimizing the light path and reflection within the light converting element to enhance conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional white light emitting diodes are used in backlight modules, then the device can provide white light, but the color purity is low and the structure becomes complex
Solution Approach 1:
The patent changes the physical parameter of surface gloss at different locations of the light converting element. The first surface (facing the light source) has a first gloss value, while the second surface (opposite to the first surface) has a second gloss value that is higher than the first gloss value. This parameter change optimizes light extraction and conversion efficiency, achieving high color purity without complex multi-layer LED structures.
2Illumination intensity
If conventional white light emitting diodes are used, then white light can be generated, but the manufacturing cost increases
Solution Approach 1:
The patent applies a simple yet effective parameter change by controlling the surface gloss values at different locations. The first surface has a lower gloss (higher light extraction efficiency) while the second surface has a higher gloss (better light reflection back to light converting material). This can be achieved through conventional coating or surface treatment processes, avoiding expensive complex LED chip fabrication while maintaining high manufacturing efficiency.
3Productivity
If the conversion efficiency of photoluminescent material is to be enhanced, then innovative design is needed, but the structure becomes more complex
Solution Approach 1:
The patent applies local quality by giving different gloss characteristics to different surfaces of the light converting element. The first surface (in contact with light source) has optimized gloss for light entry, while the second surface has different gloss optimized for light reflection and extraction. This local differentiation enhances conversion efficiency without requiring complex multi-layer structures or additional components throughout the entire device.
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 configuration improves the light conversion efficiency of the backlight module, achieving better color conversion and reducing manufacturing costs by optimizing the gloss values within a specific range.
Implementation Method 1
one of current methods provides the way of using blue light emitting diode to generate blue light and further to excite photoluminescent material, so as to produce white light through light-mixing
Implementation Method 2
The first surface has a first gloss, the second surface has a second gloss, and the first gloss is less than the second gloss... optimizing the light path and reflection within the light converting element
Data Source
AI summary
An electronic device includes a light source and a light converting element. The light converting element is disposed adjacent to the light source and has a first surface adjacent to the light source and a second surface corresponding to the first surface and positioned farther from the light source. The first surface has a first gloss which is less than a second gloss of the second surface. A display device includes a display panel and a backlight module disposed corresponding to the display panel. The backlight module includes a light source and a light converting element disposed adjacent to the light source. The light converting element has a first surface adjacent to the light source and a second surface corresponding to the first surface and positioned farther from the light source. The first surface has a first gloss which is less than a second gloss of the second surface.