Resin Connection Portion for Light Emitting Device
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Solution Overview
Problem
In light emitting devices with a resin package, the resin frame often has missing parts due to insufficient filling of resin material during molding, which can affect the reliability and efficiency of light emission.
Innovation Solution
A light emitting device design that includes a resin package with a resin connection portion connecting the first and second resin portions, ensuring the resin frame is adequately filled and preventing missing parts, along with a light-reflective member positioned between the inner lateral wall and second resin portion to enhance light extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the resin frame is integrally formed by molding with the resin portion, then the manufacturing process is simplified and productivity is improved, but the resin frame may have missing parts due to insufficient filling of resin material
Solution Approach 1:
The resin frame is divided into multiple separate components (first resin portion, second resin portion, third resin portion) that are formed and assembled independently. This segmentation allows each portion to be properly filled with resin material during molding without the filling issues that occur in integral forming, while still achieving the manufacturing efficiency goal through standardized assembly processes.
Solution Approach 2:
The first resin portion, second resin portion, and third resin portion are formed separately in advance before final assembly. This preliminary action allows each resin portion to be optimally molded and filled independently, ensuring complete filling without missing parts, and then they are assembled together to form the complete resin frame structure.
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 provides a highly reliable light emitting device with improved light extraction efficiency and prevents missing parts in the resin frame, ensuring consistent performance.
Implementation Method 1
A light-reflective member is disposed between the inner lateral wall surface and the second resin portion in the recess
Data Source
AI summary
A light emitting device includes: a resin package including: a plurality of leads that includes: a first lead having an upper surface, and a second lead having an upper surface, and a resin body that includes: a first resin portion, a second resin portion, a third resin portion disposed between the first lead and the second lead, and a resin connection portion, the plurality of leads and the at least one inner lateral wall surface of the first resin portion defining a recess, the second resin portion surrounding an element mounting region, and the resin connection portion connecting the first resin portion and the second resin portion at the bottom of the recess; at least one light emitting element disposed on the element mounting region; and a light-reflective member disposed between the inner lateral wall surface and the second resin portion in the recess.