Side Emitting LED With Integrated Waveguide Color Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional side-emitting LED devices are bulky and require significant thickness and surface area for efficient light emission, with separate color conversion layers adding to the size and complexity, making them unsuitable for compact applications.
Innovation Solution
A side-emitting light emitting device with a substrate and reflector forming a wave guiding region, where wavelength converting material is placed at the lateral edge to control color emission without external converters, allowing for a compact design and efficient light directionality, using dichroic mirrors to enhance output efficiency and prevent light loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional side-emitting LED devices use separate color conversion layers, then color control is achieved, but device size and complexity increase
Solution Approach 1:
The patent combines the wave guiding region and color conversion layer into a single integrated structure. The wave guiding region itself performs the color conversion function through its material composition, eliminating the need for separate external converter plates or distinct color conversion layers. This merging reduces device complexity while maintaining color control capability.
Solution Approach 2:
The wave guiding region is designed to serve multiple functions simultaneously: it guides light from the LED, performs wavelength conversion through its material properties, and controls the emission color. This multi-functionality eliminates the need for separate dedicated color conversion components, thereby reducing overall device complexity.
2Ease of operation
If conventional side-emitting LED devices use curved reflectors, then light directionality is improved, but footprint area increases
Solution Approach 1:
The patent transitions from using large curved reflectors in the planar dimension to using a wave guiding region that exploits the vertical dimension and lateral edge positioning. The wave guiding structure confines and directs light through total internal reflection and geometric configuration, achieving effective light directionality without requiring large horizontal footprint area.
3Productivity
If wavelength converting material is placed outside the wave guiding region, then color conversion efficiency improves, but device thickness increases
Solution Approach 1:
The patent merges the wave guiding region and color conversion layer into a single integrated structure. The wave guiding region itself performs the color conversion function through its material composition, eliminating the need for separate external converter plates or distinct color conversion layers. This merging reduces device complexity while maintaining color control capability.
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 enables a compact, high-efficiency side-emitting device with controlled color emission, reducing light loss and allowing for a smaller footprint, suitable for applications like display backlights and automotive lighting.
Implementation Method 1
substrate and reflector delimiting a wave guiding region for light emitted by said at least one light emitting diode
Implementation Method 2
a wavelength converting material is arranged at lateral edge of said wave guiding region
Data Source
Figure 1~2
Figure 3~4
AI summary
A side-emitting light emitting device (100) is provided, comprising a substrate (101), a reflector (102) arranged spaced apart from said substrate (101) and extending along the extension of said substrate, and at least one light emitting diode (103) arranged on said substrate and facing said reflector, said substrate (101) and reflector (102) delimiting a wave guiding region (104) for light emitted by said at least one light emitting diode (103). Further, a wavelength converting material (105) is arranged at the lateral edge of said wave guiding region (104). The invention provides a compact side emitter with controlled color emission.