Integrated Lens Light Emitting Device Package for Wide Beam Distribution
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Solution Overview
Problem
Secondary lenses used in light emitting device packages are large and difficult to precisely align, leading to increased production costs due to the need for wider printed circuit boards and reduced efficiency in light beam distribution.
Innovation Solution
A light emitting device package with a reflective unit and an optical device that integrates partial reflection and transmission capabilities, allowing for a compact design that minimizes the need for separate secondary lenses and enhances beam angle distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If secondary lenses are used to achieve wide beam spread, then light diffusion capability is improved, but device size increases and alignment precision deteriorates
Solution Approach 1:
The patent merges the secondary lens function with the primary lens by forming an integrated lens structure that performs both functions. The lens is formed as a single piece with the package body, eliminating the need for separate secondary lens mounting and achieving wide beam spread without alignment issues.
Solution Approach 2:
The integrated lens structure serves multiple functions simultaneously: it acts as both the primary light-emitting lens and the secondary wide-beam diffusion lens. This multi-functional design achieves light diffusion capability while maintaining compact size and precise alignment.
2Illumination intensity
If secondary lenses are mounted separately on PCB, then light beam spread is improved, but device complexity and production cost increase
Solution Approach 1:
The patent combines the secondary lens mounting function into the package structure itself. The lens is formed as an integral part of the package body through molding or other fabrication processes, eliminating separate mounting steps and reducing device complexity.
Solution Approach 2:
The package structure provides its own optical function through the integrated lens, eliminating the need for external secondary lenses and complex mounting processes. The lens structure serves itself by being part of the package body.
3Ease of manufacture
If separate lens mounting is performed, then optical function is achieved, but production time and manufacturing cost increase
Solution Approach 1:
The patent merges the lens fabrication process with the package manufacturing process. The lens is formed during the same molding or fabrication step as the package body, eliminating separate lens production and mounting operations, thereby improving productivity.
Solution Approach 2:
The lens structure is prepared in advance as part of the package body during the molding process. This preliminary formation of the lens eliminates the need for subsequent mounting operations, streamlining production and improving efficiency.
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 integrated design reduces the size of the light emitting device package, prevents alignment issues, and achieves a wide beam angle with improved light distribution efficiency compared to traditional systems.
Implementation Method 1
The optical device allows light generated by the light emitting device to be partially transmitted and be partially reflected to be emitted externally
Implementation Method 2
The optical device allows light generated by the light emitting device to be partially transmitted and be partially reflected to be emitted externally
Implementation Method 3
a wavelength conversion layer covering the light emitting device
Data Source
AI summary
A light emitting device package includes a reflective unit having a first surface and a second surface opposing the first surface and having a through hole formed in a central portion of the reflective unit to penetrate through the first and second surfaces, a light emitting device disposed in the through hole and externally exposed to one of the first and second surfaces, and an optical device disposed on the first surface of the reflective unit to cover the light emitting device. The optical device allows light generated by the light emitting device to be partially transmitted and partially reflected to be emitted externally.