Reflective LED Optical Structure for Uniform Light Distribution
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Solution Overview
Problem
Existing light-emitting diodes (LEDs) face challenges in efficiently distributing light emission to enhance brightness and intensity, particularly in applications requiring uniform light distribution and high contrast.
Innovation Solution
The design incorporates a reflective layer with a mirror surface on the carrier and a first optical element surrounding the light-emitting unit, along with a second optical element that disperses light away from the center, utilizing reflective and refractive properties to enhance light distribution and intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional LED structure is used, then the device is simple in structure, but the light distribution is uneven and brightness is insufficient
Solution Approach 1:
The LED device is divided into multiple functional layers including a light-emitting layer, a reflective layer, and an optical element layer. Each layer performs a specific function: the light-emitting layer generates light, the reflective layer redirects light away from the center, and the optical element focuses and distributes light. This segmentation allows for optimized light distribution and enhanced brightness while maintaining manufacturing feasibility.
Solution Approach 2:
A reflective layer is introduced as an intermediary component between the light-emitting layer and the optical element. This reflective layer serves as a mediator that redirects light paths, preventing direct light emission from the center and enabling more uniform light distribution across the LED surface. The intermediary layer resolves the contradiction by adding functional complexity that improves optical performance.
2Illumination intensity
If light is emitted directly from the center, then the structure is simple, but the light distribution is concentrated and uniformity is poor
Solution Approach 1:
Instead of allowing light to emit directly from the center outward, the design inverts the light path by placing a reflective layer that redirects light away from the center. The optical element then focuses this redirected light to create a more uniform distribution pattern. This inversion of the conventional light emission approach resolves the contradiction between structural simplicity and light distribution uniformity.
Solution Approach 2:
The patent introduces additional optical dimensions by incorporating a multi-layer optical structure with specific refractive indices. The optical element is designed with curved surfaces and varying thickness to manipulate light paths in multiple dimensions, transforming concentrated central emission into uniform peripheral distribution. This dimensional approach to light control achieves uniformity while managing the inherent structural complexity.
3Illumination intensity
If the LED structure is simplified, then manufacturing is easier, but light intensity and contrast are insufficient
Solution Approach 1:
The patent optimizes specific parameters of the optical element including refractive index, curvature radius, and thickness to maximize light intensity. By carefully selecting and adjusting these parameters, the design achieves enhanced light concentration and contrast ratio. The parameter optimization allows for improved optical performance while maintaining compatibility with standard manufacturing processes for LED components.
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 achieves improved light intensity and uniform distribution, increasing the contrast between the center and peripheral regions of the LED, enhancing its lighting performance.
Implementation Method 1
a reflective layer with a mirror surface on the carrier
Implementation Method 2
a second optical element that disperses light away from the center, utilizing reflective and refractive properties
Data Source
AI summary
A light-emitting device includes a carrier, a light-emitting unit disposed on the carrier, a reflective element arranged on the light-emitting unit, and an optical element arranged on the carrier and surrounding the light-emitting unit.