LED Light Source Device with Multi-Region Molding Lens
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Solution Overview
Problem
Conventional LED light sources have limited light emission angles and intensity when used in conventional bulbs, failing to provide omni-directional lighting due to their Lambertian distribution, which restricts their application in areas requiring wider illumination.
Innovation Solution
A light source device featuring a molding lens directly formed on an LED chip with a concave portion and multiple light exiting regions, where the concave portion can be cone-shaped or V-shaped, allowing light to be reflected and distributed uniformly across a wider angle, enhancing light emission uniformity and intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED light source is directly applied in conventional light bulb, then energy efficiency and long life expectancy are improved, but light emission angle is restricted and light intensity at oblique direction is weaker
Solution Approach 1:
The light exiting surface is segmented into three distinct regions: a central concave portion, a first light exiting region surrounding the concave portion, and a second light exiting region surrounding the first light exiting region. This segmentation allows different regions to control light in different directions, achieving omni-directional lighting while maintaining LED energy efficiency
Solution Approach 2:
The patent transitions from the conventional planar light exiting surface to a three-dimensional multi-region surface with concave portions and varying distances from the bottom. This dimensional change enables light to be emitted uniformly in all directions (0-360 degrees), overcoming the Lambertian distribution limitation of conventional LEDs
2Illumination intensity
If lamp housing with scattering effect is incorporated, then light intensity in oblique direction is increased, but omni-directional lighting requirement is still not met
Solution Approach 1:
Different regions of the light exiting surface are designed with different optical properties: the concave portion reflects light to enhance intensity in specific directions, while the first and second light exiting regions emit light in different angular ranges. This local differentiation achieves true omni-directional lighting that scattering housings cannot provide
Solution Approach 2:
The concave portion is designed with curved surfaces (cone-shaped or V-shaped) that reflect light in specific patterns. This curvature enables precise control of light reflection angles, distributing light uniformly across all directions without relying on scattering effects
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 device achieves wide-angle light-emitting effects and great light-emitting uniformity, addressing the limitations of conventional LED light sources by optimizing light distribution through the molding lens design, resulting in improved illumination patterns.
Implementation Method 1
the concave portion can be cone-shaped or V-shaped, allowing light to be reflected and distributed uniformly across a wider angle
Implementation Method 2
A light source device featuring a molding lens directly formed on an LED chip with a concave portion and multiple light exiting regions
Data Source
AI summary
A light source device including a light emitting diode (LED) chip and a molding lens is provided. The molding lens is directly formed on the LED chip and includes a center of a bottom where the LED chip located at and a light exiting surface formed corresponding to the center. The light exiting surface comprises a concave portion, a first light exiting region surrounding the concave portion and a second light exiting region surrounding the first light exiting region. The first light exiting region connects between the concave portion and the second light exiting region.