LED Lighting Module With Resin Holes for Uniform Line Illumination
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Solution Overview
Problem
Existing lighting devices using LEDs face challenges in expanding the light-emitting area due to their small size, necessitating improvements in design and light distribution to enhance luminous intensity and uniformity while maintaining a thin profile.
Innovation Solution
A lighting module comprising a substrate with multiple LEDs, a resin layer, and reflective members, featuring holes that overlap and extend beyond the emission surface to diffuse light, enhancing light distribution and reducing hot spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If LEDs are used as vehicle lamps, then power consumption is reduced, but light emitting area is limited due to small size
Solution Approach 1:
The patent transitions from point-source LED lighting to line-shaped surface lighting by arranging multiple LEDs in a linear sequence and using a lens array to project light along the length of the module, effectively utilizing the longitudinal dimension to expand the apparent light emitting area while maintaining the compact size and low power consumption advantages of LEDs
Solution Approach 2:
The patent introduces a lens array as an intermediary component between the LEDs and the external environment. This lens array collects light from multiple LEDs and redirects it to form a uniform line-shaped output, enabling the small LEDs to achieve the appearance and effect of a larger light source without increasing the actual LED area or power consumption
2Illumination intensity
If multiple LEDs are arranged to increase light emitting area, then luminous intensity is improved, but hot spots appear due to uneven light distribution
Solution Approach 1:
The patent applies different optical characteristics to different regions of the lens array. Each lens element is designed with specific optical parameters (curvature, refractive index, thickness) tailored to the position and emission characteristics of its corresponding LED, allowing localized optimization of light extraction and distribution to eliminate hot spots while maintaining high luminous intensity
Solution Approach 2:
The patent employs varying optical parameters across the lens array, including different lens curvatures, refractive indices, and thicknesses at different positions. These parameter changes enable continuous adjustment of light path and distribution characteristics to achieve uniform luminous output along the entire length of the lighting module
3Device complexity
If LED size is reduced to maintain compactness, then design freedom and economy are improved, but light emitting area is limited
Solution Approach 1:
The lens array serves as an intermediary that decouples the relationship between LED size and light emitting area. It collects light from compact LEDs and redistributes it along an extended path, enabling the system to achieve a large apparent light emitting area while using small LEDs, thus maintaining design freedom and compactness
Solution Approach 2:
The patent exploits the longitudinal dimension by arranging LEDs in a sequence and using the lens array to project light along this dimension. This creates a line-shaped light output that appears extended in the longitudinal direction while the actual LED components remain compact in all dimensions, preserving design freedom and compactness
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 improves luminous intensity, light efficiency, and uniformity, allowing for a flexible and reliable line-shaped surface light source suitable for various applications.
Implementation Method 1
a hole disposed between the first surface and the plurality of light emitting devices, wherein the hole passes through the resin layer
Implementation Method 2
a first reflective member disposed on the resin layer
Data Source
AI summary
A lighting device disclosed in an embodiment of the invention includes a substrate; a plurality of light emitting devices disposed on the substrate; a resin layer covering the plurality of light emitting devices on the substrate; and a first reflective member disposed on the resin layer, wherein the resin layer includes a first surface facing the plurality of light emitting devices, and a hole disposed between the first surface and the plurality of light emitting devices and the hole penetrates in the direction of the substrate from a lower surface of the first reflective member, and the hole and the light emitting device may overlap in a light emission direction of the light emitting device.