Side Emitting LED with Integrated Half-Cone Reflector
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional side emitting light emitting diodes have a large volume, making them unsuitable for small-scale modules and inefficient in light reflection due to a significant scattering distance between the LED chip and the light reflector.
Innovation Solution
A side emitting light emitting diode design featuring a substrate with an LED chip, a light transmitting package, and a half transmitting cone light reflector with a reflective metal surface, such as gold or silver, to reduce the occupied area and enhance light reflection efficiency by minimizing the scattering distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional sawtooth lens is attached to the LED to achieve lateral light emission, then the light emission direction is improved, but the overall volume of the structure becomes too large for small-scale modules
Solution Approach 1:
The patent merges the light reflector and the LED package into a single integrated structure. The reflector is positioned within the package cavity rather than being a separate external component, combining multiple functions (light reflection, light guidance, and structural support) into one unified element, thereby reducing the overall volume while maintaining lateral light emission capability
Solution Approach 2:
The patent transitions from using an external attached lens (three-dimensional external structure) to an integrated reflector within the package (internal two-dimensional surface optimization). By optimizing the reflector surface geometry within the package cavity, the invention achieves lateral light emission without adding external volume
2Illumination intensity
If the light scattering distance between the LED chip and the light reflector is increased, then the light reflection coverage is improved, but the light reflecting efficiency decreases
Solution Approach 1:
The patent applies local quality optimization by designing the reflector with a specific curved surface geometry that concentrates reflection at optimal locations. The reflector surface is shaped to direct light laterally while maintaining a short scattering distance, creating localized high-efficiency reflection zones that achieve both coverage and efficiency
Solution Approach 2:
The patent employs a curved surface reflector instead of a flat surface. The curvature is specifically designed to redirect light at appropriate angles for lateral emission while minimizing the scattering distance. The spherical or parabolic curvature focuses light reflection efficiently, achieving both broad coverage and high reflection efficiency
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 reduces the occupied area and enhances luminosity efficiency while improving lateral light emission, making it suitable for small-scale modules with increased light reflection efficiency.
Implementation Method 1
The light reflector is a half transmitting cone and the surface is anodized with an opaque and reflective layer made of the metal to reflect the light
Implementation Method 2
The packaging gel is epoxy or silicone resin and the refraction rate of the packaging gel is more than 1.35. The shell is made of light transmitting plastic with the refraction rate more than 1.3
Data Source
AI summary
A side emitting LED is provided, and it includes a substrate, at least one LED chip, a light transmitting package and a light reflector. The substrate includes a base, and the LED chip is mounted on the base. The light transmitting package is a half-closed form and is mounted on the substrate to hold the LED chip. The light reflector is disposed on the package and corresponds to the LED chip to alter the light direction radiated from the LED chip. Therefore, the light radiated from the LED chip is reflected by the corresponding light reflector and passes through the light transmitting package to be emitted laterally.