Side-Emitting LED Pairing for Focused Beam Spread
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Solution Overview
Problem
Traditional light-emitting diodes (LEDs) have a wide beam spread that is not as focused as conventional light sources, leading to increased size, heat output, and expense in configurations attempting to mitigate this issue, making them less suitable for various applications.
Innovation Solution
A pair of side-emitting LEDs are arranged head-to-head to complement each other's beam spreads, increasing the overall beam spread and achieving a more focused light output, which can be further enhanced with Fresnel lenses and adjustable positioning for specific applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LED elements are used to compensate for wide beam spread, then beam spread coverage is improved, but device size increases
Solution Approach 1:
The patent combines two side-emitting LED elements in a head-to-head configuration where the LEDs are positioned with their emitting surfaces facing each other. This merging approach allows the beam spreads of individual LEDs to complement each other, creating a combined beam pattern that achieves wider coverage without requiring numerous separate LED elements, thus avoiding excessive device size increase.
Solution Approach 2:
The patent utilizes a side-emitting LED configuration where light is emitted laterally from the LED chip rather than vertically. By arranging LEDs head-to-head in a horizontal orientation and using Fresnel lenses positioned around the LED assembly, the system achieves three-dimensional beam spread coverage that effectively illuminates areas in multiple directions without requiring a large planar array of LEDs.
2Illumination intensity
If multiple LED elements are used to compensate for wide beam spread, then beam spread coverage is improved, but heat output increases
Solution Approach 1:
The patent combines two side-emitting LED elements in a head-to-head configuration where the LEDs are positioned with their emitting surfaces facing each other. This merging approach allows the beam spreads of individual LEDs to complement each other, creating a combined beam pattern that achieves wider coverage without requiring numerous separate LED elements, thus avoiding excessive device size increase.
Solution Approach 2:
The patent utilizes a side-emitting LED configuration where light is emitted laterally from the LED chip rather than vertically. By arranging LEDs head-to-head in a horizontal orientation and using Fresnel lenses positioned around the LED assembly, the system achieves three-dimensional beam spread coverage that effectively illuminates areas in multiple directions without requiring a large planar array of LEDs.
3Illumination intensity
If multiple LED elements are used to compensate for wide beam spread, then beam spread coverage is improved, but device cost increases
Solution Approach 1:
The patent combines two side-emitting LED elements in a head-to-head configuration where the LEDs are positioned with their emitting surfaces facing each other. This merging approach allows the beam spreads of individual LEDs to complement each other, creating a combined beam pattern that achieves wider coverage without requiring numerous separate LED elements, thus avoiding excessive device size increase.
Solution Approach 2:
The patent employs Fresnel lenses that serve multiple functions: they focus and direct the light from the side-emitting LEDs, extend the beam spread in desired directions, and can be configured in various arrangements (single lens, multiple lenses, different positions) to achieve different lighting patterns. This multi-functionality allows a single lens system to replace what would otherwise require multiple LED elements, reducing overall device cost.
4Illumination intensity
If conventional light sources are used to achieve focused beam spread, then beam focus is improved, but energy efficiency deteriorates
Solution Approach 1:
The patent replaces conventional incandescent or fluorescent light sources with light-emitting diodes (LEDs), which are solid-state light sources known for superior energy efficiency. By using side-emitting LED configurations with Fresnel lenses, the system achieves focused beam spreads while consuming significantly less electrical energy compared to traditional light sources, thus resolving the contradiction between beam focus and energy efficiency.
Solution Approach 2:
The patent changes the fundamental operating parameters by using LEDs that convert electrical energy directly to light with higher efficiency. The side-emitting configuration and Fresnel lens system optimize the light output parameters to achieve desired beam patterns while maintaining the energy-efficient characteristics of LED technology.
5Illumination intensity
If conventional light sources are used to achieve focused beam spread, then beam focus is improved, but lifespan deteriorates
Solution Approach 1:
The patent replaces conventional incandescent or fluorescent light sources with light-emitting diodes (LEDs), which are solid-state light sources known for superior energy efficiency. By using side-emitting LED configurations with Fresnel lenses, the system achieves focused beam spreads while consuming significantly less electrical energy compared to traditional light sources, thus resolving the contradiction between beam focus and energy efficiency.
Solution Approach 2:
The patent changes the fundamental operating parameters by using LEDs that convert electrical energy directly to light with higher efficiency. The side-emitting configuration and Fresnel lens system optimize the light output parameters to achieve desired beam patterns while maintaining the energy-efficient characteristics of LED technology.
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
This configuration provides a compact, energy-efficient, and cost-effective lighting solution with a wider beam spread, suitable for applications like marine and aviation lighting, while minimizing shadows and allowing for adjustable beam patterns.
Implementation Method 1
When used with a refracting Fresnel lens, light output from the LEDs is diffused to an extent that any shadows that might be generated from structure supporting the lighting device are eliminated.
Implementation Method 2
Such a beam spread provides an essentially ideal light source for use with a Fresnel lens.
Data Source
AI summary
A lighting device having one or more pair of side-emitting light-emitting diodes arranged end-to-end, one “flipped” relative to the other, such that the beam spreads of the LEDs complement one another and increase the overall beam spread of the device, or instead the intensity of the beam about a narrow angle.