Optical Assembly with Segmented Wavelength Converter
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Solution Overview
Problem
Conventional solid state light emitting device lamps have a highly focused light display range and visual effect different from incandescent lamps, lacking efficient wavelength conversion and light redirecting capabilities.
Innovation Solution
An optical assembly with a wavelength converting device and a reflector, where the wavelength converting device is a spatial structure such as a pyramid, cone, or hemisphere, and the reflector covers a portion of the device to expose specific surfaces for light entry and exit, allowing wavelength conversion and light profile modification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional solid state light emitting device is used, then power consumption is reduced and luminous efficiency is improved, but light distribution becomes highly focused and visual effect differs significantly from incandescent lamps
Solution Approach 1:
The wavelength converting device is divided into multiple surfaces (first surface, second surface, third surface) with different reflector coverage configurations. Each surface segment handles light differently - some surfaces have reflectors covering portions to redirect light, while other surfaces remain exposed for direct light emission, creating a distributed light output pattern that mimics incandescent lamps.
Solution Approach 2:
Different regions of the wavelength converting device are given different properties by selectively applying reflectors to specific surfaces. The first surface has a reflector covering a first portion, the second surface has a reflector covering a second portion, while the third surface remains partially exposed. This local differentiation of surface properties enables varied light redirection and emission characteristics across different directions, achieving a broader overall light distribution.
2Use of energy by moving object
If conventional solid state light emitting device is used, then energy efficiency is improved, but wavelength conversion capability is insufficient
Solution Approach 1:
A wavelength converting device is introduced as an intermediary component between the light source and the surrounding environment. This device receives light from the light source, converts its wavelength through phosphor materials, and redirects the converted light through strategically placed reflectors. The wavelength converting device acts as a mediator that transforms the characteristics of the original light while maintaining energy efficiency, enabling both high efficiency operation and enhanced wavelength conversion capability.
3Illumination intensity
If fluorescent lamp is used, then high luminance and durability are achieved, but heavy metal content causes environmental damage
Solution Approach 1:
The invention changes the material composition parameter of the light emitting system by replacing fluorescent lamp materials containing heavy metals with solid state light emitting devices and phosphor-based wavelength converting materials. This parameter change in material composition eliminates harmful heavy metals while maintaining or improving luminance through the combination of efficient LED light sources and optimized phosphor wavelength conversion in a multi-surface configuration.
4Ease of operation
If wavelength converting device with full reflector coverage is used, then light redirection is maximized, but light entry and exit paths are blocked
Solution Approach 1:
Instead of applying reflectors to all surfaces of the wavelength converting device, the invention uses partial coverage - reflectors are applied to only the first and second surfaces, while the third surface remains partially exposed. This partial action approach allows sufficient light redirection from the covered surfaces while maintaining open light paths through the uncovered portions, avoiding the complexity and light blocking issues that would result from complete reflector coverage of all surfaces.
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
Enables efficient wavelength conversion and light profile modification, producing a broader light distribution and a visual effect similar to incandescent lamps, while being environmentally friendly by eliminating the need for heavy metals like mercury.
Implementation Method 1
an optical assembly adaptable for being disposed at a light path of the light emitted by at least one light source... includes a wavelength converting device... the light emitted by the at least one light source enters and leaves the wavelength converting device
Implementation Method 2
includes a reflector... the reflector covers a portion of the wavelength converting device and exposes at least a portion of a region of at least one surface of the wavelength converting device... light redirecting functions
Data Source
AI summary
An optical assembly that is adapted to be located at a light path of light emitted from at least one light source and spaced apart from the at least one light source by a distance is provided. The optical assembly includes a wavelength converting device, which is a spatial structure, and a reflector. The reflector covers a portion of the wavelength converting device and exposes at least a portion of a region of at least one surface of the wavelength converting device. The light emitted from the at least one light source enters or leaves the wavelength converting device from at least the portion of area which is not covered by the reflector. An optical module including the light source and the optical assembly is further provided.