Hybrid Spot and General LED Luminaire Optical Element
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Solution Overview
Problem
Illumination devices using LEDs face limitations in light output level, color quality stability, color rendering, spatial and angular variations, and high costs due to the need for color control electronics and sensors.
Innovation Solution
An LED-based illumination device with a color conversion cavity and an optical element that produces a hybrid emission pattern, featuring a spot beam within a predetermined far field angle and a background level spherical emission pattern, utilizing a perimeter that increases from the input port to a maximum and then decreases to the output port, with a semi-transparent sidewall for light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LEDs are used for illumination, then energy efficiency is improved, but light output level and color quality are insufficient
Solution Approach 1:
The optical element is divided into multiple functional zones: a first region for generating a first light pattern and a second region for generating a second light pattern. This segmentation allows different portions of light to be directed in different directions, achieving both focused illumination and general ambient lighting from a single LED source, thereby improving overall light output level while maintaining energy efficiency.
Solution Approach 2:
The patent introduces angular/directional control as an additional dimension to light distribution. By creating distinct light patterns at different angles (first light pattern and second light pattern), the system maximizes illumination effectiveness in multiple directions simultaneously, overcoming the limitation of single-direction LED emission.
2Use of energy by moving object
If LEDs are used for illumination, then energy efficiency is improved, but color quality and color rendering are poor
Solution Approach 1:
The optical element is divided into multiple functional zones: a first region for generating a first light pattern and a second region for generating a second light pattern. This segmentation allows different portions of light to be directed in different directions, achieving both focused illumination and general ambient lighting from a single LED source, thereby improving overall light output level while maintaining energy efficiency.
Solution Approach 2:
Different regions of the optical element are designed with different optical properties to control light distribution. The first region and second region have different transmission characteristics that shape the light patterns, enabling optimized color rendering and stability in different spatial directions while maintaining the energy efficiency of LED operation.
3Use of energy by moving object
If LEDs are used for illumination, then energy efficiency is improved, but spatial and angular variations in color occur
Solution Approach 1:
The optical element is divided into multiple functional zones: a first region for generating a first light pattern and a second region for generating a second light pattern. This segmentation allows different portions of light to be directed in different directions, achieving both focused illumination and general ambient lighting from a single LED source, thereby improving overall light output level while maintaining energy efficiency.
Solution Approach 2:
The patent introduces angular/directional control as an additional dimension to light distribution. By creating distinct light patterns at different angles (first light pattern and second light pattern), the system maximizes illumination effectiveness in multiple directions simultaneously, overcoming the limitation of single-direction LED emission.
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 enhances light output and color stability, reduces costs by optimizing light emission patterns, and provides both focused and uniform illumination, improving the overall performance of LED-based illumination systems.
Implementation Method 1
The optical element receives an amount of light from the LED based illumination device at the input port, emits a first portion of the light from a curved, semitransparent sidewall, and emits a second portion of the light at the output port
Data Source
AI summary
A luminaire includes an LED based illumination device with a light emitting area and an optical element that is configured to produce a hybrid emission pattern with a spot beam emitted within a predetermined far field angle and a background level spherical emission pattern. The optical element, for example, may be configured with an input port and an output port, and a perimeter that increases in size from the input port to a maximum perimeter and decreases from the maximum perimeter to the output port. The optical element receives an amount of light from the LED based illumination device at the input port, emits a first portion of the light from a curved, semitransparent sidewall, and emits a second portion of the light at the output port, wherein the emission area of the output port is less than a maximum perimeter of the optical element.