Light Emitting Package Layout for Higher Light Extraction
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Solution Overview
Problem
Existing light emitting devices face challenges in improving light extraction efficiency due to the integration of light emitting elements and electronic components on a shared base member, which limits the effective transmission and reflection of light.
Innovation Solution
A light emitting device design featuring a base member with distinct regions for light emitting elements and electronic components, surrounded by frames and covered with light-transmissive and non-light-transmissive members, where the upper surface of the light-transmissive member is positioned higher than the frames, enhancing light extraction efficiency and reducing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If light emitting elements and electronic components are mounted on a shared base member, then device size is reduced, but light extraction efficiency deteriorates
Solution Approach 1:
The base member is divided into a light-emitting region and an electronic component region, with distinct frames and covering members for each region. This segmentation allows optimized light extraction structures (light-transmissive first covering member with higher upper surface) for the light-emitting region while maintaining compact integration with electronic components in the separate electronic component region.
Solution Approach 2:
The first covering member is designed with its upper surface positioned higher than the upper surfaces of the first frame and second frame, creating a stepped three-dimensional structure. This dimensional differentiation allows light to be extracted more efficiently from the light-emitting element without increasing the overall footprint area, thus improving light extraction efficiency while maintaining reduced device size.
2Volume of moving object
If frames and covering members are integrated to reduce device size, then manufacturing complexity increases
Solution Approach 1:
The first frame and second frame are integrated into a unified structure that surrounds both the light-emitting region and electronic component region. This merging reduces the number of separate components and assembly steps while maintaining the functional separation and optimized light extraction geometry, thereby reducing device size without proportionally increasing manufacturing complexity.
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 design significantly improves light extraction efficiency by minimizing reflection and absorption, allowing for more efficient light emission and reducing the device's size while maintaining reliability and flexibility in component arrangement.
Implementation Method 1
a light-transmissive first member provided inward of the first frame, and covering the light emitting element
Implementation Method 2
a non-light-transmissive second member provided inward of the second frame and covering the electronic component
Data Source
AI summary
A light emitting device includes: a base member having a first surface including a first region and a second region; a first frame provided on the base member and surrounding the first region; a light emitting element provided on the base member in the first region; a light-transmissive first member provided inward of the first frame, and covering the light emitting element; an electronic component provided on the base member in the second region and electrically connected with the light emitting element; and a plurality of pin holes arrayed in a first direction and electrically connected with the electronic component, the first direction being orthogonal to a thickness direction of the base member. The electronic component is provided on a side opposite the plurality of pin holes with respect to the light emitting element in a second direction that is orthogonal to the thickness direction and the first direction.