Removable Fluorescence Sheet for LED Chromaticity Correction
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Solution Overview
Problem
Existing light emitting device packages face challenges in correcting chromaticity coordinates without compromising product yield and simplifying assembly, as existing solutions require replacing the entire package when chromaticity errors occur.
Innovation Solution
A light emitting device package design featuring a removable fluorescence sheet that can be easily exchanged to correct chromaticity coordinates, allowing for precise adjustment without altering the light emitting device package itself, thereby improving yield and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire light emitting device package is replaced when chromaticity coordinates need correction, then chromaticity accuracy is improved, but product yield decreases and assembly complexity increases
Solution Approach 1:
The light emitting device package is divided into separate functional modules: the light emitting device (LED chip) and the fluorescence sheet are independent components. The fluorescence sheet can be removed and replaced without affecting the light emitting device, allowing chromaticity correction without replacing the entire package. This segmentation enables selective replacement of only the fluorescence sheet component.
Solution Approach 2:
The fluorescence sheet is extracted as a separate, removable component from the light emitting device package. The package structure includes a mounting position for the fluorescence sheet that allows it to be taken out and replaced independently. This extraction enables correction of chromaticity coordinates by replacing only the fluorescence sheet rather than the entire package.
2Measurement precision
If the entire light emitting device package is replaced when chromaticity coordinates need correction, then chromaticity accuracy is improved, but assembly complexity increases
Solution Approach 1:
The package structure is segmented into the light emitting device and the fluorescence sheet as separate components. The fluorescence sheet is designed to be mounted on or near the light emitting device but can be independently removed and replaced. This segmentation simplifies assembly by allowing the fluorescence sheet to be attached after the light emitting device is already in place, reducing overall assembly complexity.
3Ease of repair
If the fluorescence sheet is made removable for easy exchange, then ease of repair is improved, but structural complexity increases
Solution Approach 1:
The fluorescence sheet is extracted as a removable component with a specific mounting structure. The package includes features such as a mounting position or attachment mechanism that allows the fluorescence sheet to be easily removed and replaced. This extraction design enables easy repair by allowing technicians to replace only the fluorescence sheet without disassembling the entire light emitting device package.
Solution Approach 2:
The fluorescence sheet mounting structure is designed to be dynamically adjustable or easily configurable. The removable design allows the fluorescence sheet to be attached and detached without permanent fixation, enabling easy exchange while maintaining a relatively simple overall package structure. The mounting position is designed to accommodate this dynamic attachment and removal process.
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
Enables efficient correction of chromaticity coordinates by swapping the fluorescence sheet, enhancing product yield and simplifying the assembly process while maintaining the integrity of the light emitting device package.
Implementation Method 1
a fluorescence sheet including a fluorescence material for converting light emitted from the light emitting device into another light
Data Source
AI summary
A light emitting device package according to the embodiment includes a body having a cavity; at least one light emitting device in the cavity; a resin member filled in the cavity while covering the light emitting device; and a fluorescence sheet coupled with a top surface of the body such that the fluorescence sheet is physically separable from the top surface of the body, and including a fluorescence material for converting light emitted from the light emitting device into another light.