Light Emitting Device Phosphor Cover Reflection Frame
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Solution Overview
Problem
Existing light emitting devices face challenges in firmly joining semiconductor light emitting elements to substrates while maintaining production efficiency, with previous designs either compromising stability or efficiency in the manufacturing process.
Innovation Solution
A light emitting device design featuring a phosphor cover attached to the light emitting element to cover its top and side faces, combined with a reflection frame that holds the phosphor cover and has a tilted face to securely attach the element to the substrate, along with a resin layer for light condensation or diffusion, allowing for stable attachment without compromising production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the phosphor-containing resin is made apart from the substrate to prevent breakage of the connection part, then the connection part is protected from breakage, but the joining stability between the substrate and the light emitting element becomes unstable
Solution Approach 1:
The phosphor-containing resin is divided into two distinct parts: a first phosphor-containing resin that contacts the light emitting element and a second phosphor-containing resin that fills the recess in the substrate. This segmentation allows each part to perform its specific function independently - the first part ensures stable joining with the light emitting element while the second part provides structural support in the recess, thereby resolving the contradiction between preventing connection part breakage and maintaining joining stability.
2Stability of the object's composition
If the reflection frame is used to surround the phosphor part for firm joining, then the joining stability is improved, but the manufacturing process becomes more complex and production efficiency decreases
Solution Approach 1:
The invention extracts and eliminates the reflection frame component from the structure. Instead of using a separate reflection frame to surround and hold the phosphor part, the patent integrates the phosphor-containing resin directly into the substrate recess, allowing the resin itself to provide the holding and stabilizing function that previously required the reflection frame. This simplification removes the complex multi-step manufacturing process involving wire bonding, reflection frame attachment, and resin filling, thereby improving production efficiency while maintaining joining stability.
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 firm and stable connection of the light emitting element to the substrate, improving light use efficiency and reducing production complexity, while enhancing the light emission intensity and color rendering index.
Implementation Method 1
a tilted face tilting from the side face to the outside and upward
Data Source
AI summary
A light emitting device includes a light emitting element including electrodes on its under face, a phosphor cover attached to the light emitting element so as to cover a top face and a side face of the light emitting element, and a reflection frame including a side face holding periphery of the phosphor cover and a tilted face tilting from the side face to the outside and upward.