Reflective Resin LED Lighting Module for Uniform Line Emission
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Solution Overview
Problem
Conventional LED-based vehicle lamps face challenges in expanding the light-emitting area due to their narrow light emission angle, which limits design flexibility and efficiency.
Innovation Solution
A lighting module design featuring a substrate with light-emitting devices surrounded by a resin layer and reflective layers, incorporating convex and concave portions to enhance light distribution and uniformity, ensuring a line-shaped surface light source with improved luminance and reduced hot spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED is used as vehicle lamp to reduce power consumption, then energy efficiency is improved, but light-emitting area is limited due to small LED size and narrow emission angle
Solution Approach 1:
The patent transitions from point-source LED emission to line-shaped surface light source by arranging multiple LEDs in a linear configuration with reflective surfaces, effectively extending the light-emitting area from zero-dimensional point to one-dimensional line structure
Solution Approach 2:
The lighting module divides the light-emitting function into multiple discrete LED segments arranged in a line, with each LED contributing to the overall line-shaped light source, allowing the system to achieve large effective emitting area while maintaining individual LED efficiency
2Area of stationary object
If multiple LEDs are arranged to increase light-emitting area, then light distribution is improved, but hot spots and non-uniform luminance occur
Solution Approach 1:
The patent applies different optical properties to different regions: reflective layers are positioned behind specific LED groups to redirect light laterally, while the front surface features convex portions for light extraction and concave portions for light redistribution, creating locally optimized light control zones that collectively achieve uniform illumination
Solution Approach 2:
The resin layer acts as an intermediary medium between the LEDs and the external environment, providing both structural support and optical functions including light diffusion, wavelength conversion via phosphor, and shaping of the line-shaped light source to ensure uniform luminance distribution
3Ease of manufacture
If conventional LED structure is used, then manufacturing is simple, but design flexibility is limited due to narrow emission angle
Solution Approach 1:
The lighting module integrates multiple functions into a single compact structure: LEDs provide light emission, reflective layers enable light redirection and area expansion, resin layer provides structural support and optical modification, and the convex-concave surface configuration enables both light extraction and uniform distribution, achieving multi-functionality without significantly complicating manufacturing
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 design increases light-emitting area, enhances light uniformity, and reduces hot spots, providing a flexible and efficient LED-based lighting solution for various applications including vehicle lamps.
Implementation Method 1
a light emitting device disposed on the substrate and emitting light in a lateral direction
Implementation Method 2
a reflective layer disposed around a lower portion of the light emitting device
Data Source
AI summary
Lighting module disclosed in an embodiment of the invention, a substrate; a plurality of light emitting devices disposed on the substrate; a first reflective layer disposed on the substrate; a resin layer disposed on the first reflective layer and the light emitting device; and a second reflective layer disposed on the resin layer, wherein the resin layer is a front side surface on which light generated from the plurality of light emitting devices is emitted, a rear side surface facing the front side surface, and first and second side surfaces connecting the front side surface and the rear side surface with each other. A distance between the first reflective layer and the second reflective layer is smaller than a distance between the front side surface and the rear side surface of the resin layer, and the front side surface of the resin layer has a plurality of convex portions convex toward the front side surface from the light emitting device and a plurality of concave portions recessed in a direction of the rear side surface.