Light-emitting Device with Convex Sealing Resin for Phosphor Mixing Prevention
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Solution Overview
Problem
Existing light-emitting devices with multiple color-emitting portions face challenges in simplifying the manufacturing process and reducing occupied area, as they often require complex resin structures and separate zones to prevent phosphor mixing.
Innovation Solution
A light-emitting device design featuring a substrate with convex-shaped sealing resins forming an annular shape, where one or both resins include phosphor particles to emit different fluorescent colors, with the first resin having higher thixotropy than the second to maintain shape until cured and prevent mixing, allowing for simplified manufacturing and area reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate zones with resin partition walls are used to prevent phosphor mixing, then phosphor mixing is prevented, but device complexity and occupied area increase
Solution Approach 1:
The invention extracts and removes the resin partition wall structure from the system. Instead of using physical barriers to prevent phosphor mixing, the patent allows phosphors to be mixed in a single resin body, thereby eliminating the complex partition wall structure and reducing device complexity while maintaining phosphor separation through optical design
Solution Approach 2:
The invention merges multiple phosphors into a single resin body without requiring separate zones or partition walls. By combining the phosphor-containing resins into one continuous structure, the patent eliminates the need for complex partition structures while achieving the desired optical effects through the mixed phosphor composition
2Adaptability or versatility
If multiple separate sealing resins are used for different light-emitting portions, then color emission is achieved, but manufacturing process complexity and occupied area increase
Solution Approach 1:
The invention merges multiple phosphor-containing resins into a single integrated resin body that provides multiple color emission capabilities. This unified structure eliminates the need for separate sealing resins and partition walls, thereby reducing device complexity while maintaining versatile color emission through the combined phosphor mixture
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 simplifies the manufacturing process and reduces the occupied area by using high thixotropy resins to maintain shape and prevent phosphor mixing, enabling flexible color emission and fine control of light intensity and chromaticity.
Implementation Method 1
one of the first and second sealing resins includes a phosphor particle to emit a different fluorescent color from each other
Implementation Method 2
A resin material of the first sealing resin has a higher thixotropy before curing than a resin material of the second sealing resin
Data Source
AI summary
A light-emitting device includes a first light-emitting element disposed on a substrate, a convex-shaped first sealing resin that includes an annular portion formed in a closed annular shape in a top view and seals the first light-emitting element, a second light-emitting element disposed on the substrate in a region surrounded by the annular portion of the first sealing resin, and a second sealing resin filled in the region surrounded by the annular portion so as to seal the second light-emitting element. One of the first and second sealing resin includes a phosphor particle or the first and second sealing resins include a phosphor particle to emit a different fluorescent color from each other.