Light Emitting Device Package With Refraction Portion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light emitting device packages with integrated lenses have limited design freedom and can only widen the viewing angle of emitted light by a single refraction surface, restricting the adjustment of light paths.
Innovation Solution
Incorporating a refraction portion between the light emitting device and the lens, which includes multiple refraction surfaces and a higher refractive index than the light emitting device, to further widen the viewing angle by additional refraction, and using a lens with upper and lower recesses to align with the light emitting device along an optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional integrated lens is used in the light emitting device package, then the structure is simple, but the viewing angle of the emitted light is limited and design freedom is reduced
Solution Approach 1:
The light emitting device package is segmented into multiple functional components: a light emitting device, a separate lens, and a refraction portion with multiple refraction surfaces. This segmentation allows each component to be optimized independently while providing greater design freedom and viewing angle control compared to an integrated lens design.
Solution Approach 2:
A refraction portion is introduced as an intermediary element between the light emitting device and the lens. This refraction portion includes multiple refraction surfaces that can independently control light paths, serving as a mediator that enhances viewing angle adjustment capability without complicating the overall system architecture.
2Device complexity
If only a single refraction surface is provided in the lens, then the device complexity is low, but the freedom in designing light paths is limited
Solution Approach 1:
The refraction function is segmented into multiple independent refraction surfaces within the refraction portion. Each refraction surface can be designed with different orientations and curvatures, enabling independent control of light paths in different directions and providing greater design freedom.
Solution Approach 2:
The refraction portion introduces additional dimensional complexity by incorporating multiple refraction surfaces at different orientations and positions. This multi-dimensional approach to light refraction enables more versatile light path control compared to a single refraction surface.
3Ease of manufacture
If the lens is directly disposed on the light emitting device without recesses, then the manufacturing process is simpler, but the alignment precision along the optical axis is reduced
Solution Approach 1:
The lens and refraction portion are pre-formed with upper and lower recesses that serve as alignment features. These recesses are created during the molding process, preliminarily establishing the correct optical axis alignment before the final assembly step, thereby ensuring precise positioning without complicating the assembly process.
Solution Approach 2:
The recesses in the lens and refraction portion create a self-aligning mechanism during assembly. The components naturally fit together along the optical axis through the interlocking recess structures, enabling self-alignment that ensures precise optical positioning without requiring complex external alignment tools or procedures.
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 allows for a wider viewing angle of the emitted light and improves light emission efficiency, enabling more flexible design options for light emitting device packages while maintaining structural stability and uniform color distribution.
Implementation Method 1
a refraction portion disposed under the lens... for refracting the light emitted by the light emitting device
Data Source
AI summary
A light emitting device package is disclosed. The light emitting device package includes a lens, a refraction portion disposed under the lens, and a light emitting device disposed under the refraction portion, wherein the lens includes a top surface, a bottom surface opposite to the top surface, an upper recess formed in the top surface, and a lower recess formed in the bottom surface, the refraction portion is disposed at a first bottom surface of the bottom surface, the first bottom surface defining the lower recess, and the upper recess, the lower recess, the refraction portion, and the light emitting device are aligned along an optical axis.