Light Reflection Patterns for LED Luminous Flux
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Solution Overview
Problem
Current light-emitting devices face challenges in enhancing luminous flux while simplifying the manufacturing process, particularly in effectively gathering and directing light emitted from the light-emitting chip.
Innovation Solution
The design incorporates a light-emitting chip with a first and second surface, featuring a first light reflection pattern on the second surface, a light-transmitting pattern between the chip and the reflection patterns, and a wavelength conversion layer on the first surface, which includes a combination of first and second light reflection patterns to maximize light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional light-emitting device structure is used, then the manufacturing process is relatively simple, but the luminous flux is insufficient and light gathering efficiency is poor
Solution Approach 1:
The light reflection structure is segmented into multiple distinct patterns: a first light reflection pattern on the bottom surface, second light reflection patterns on side surfaces, and a light-transmitting pattern extending between them. This segmentation allows each pattern to be optimized for specific light reflection and transmission functions, thereby improving overall light extraction efficiency and luminous flux without requiring complete structural redesign
Solution Approach 2:
The invention extends the light reflection functionality from a single bottom surface to multiple dimensions by adding side surface reflection patterns and creating a three-dimensional light management structure. The light-transmitting pattern connects different dimensional elements (bottom and side surfaces), creating a multi-dimensional light extraction system that enhances luminous flux while maintaining manufacturability
2Illumination intensity
If light reflection patterns are added to improve light gathering, then luminous flux improves, but the manufacturing process becomes more complex
Solution Approach 1:
The light-transmitting pattern serves multiple functions simultaneously: it acts as a structural support element, provides a pathway for light transmission between reflection patterns, and defines the spatial relationship between different light management components. This multi-functionality reduces the need for additional separate components, simplifying the manufacturing process while maintaining improved light gathering efficiency
Solution Approach 2:
The invention merges the light reflection and light transmission functions into an integrated structure where the first and second light reflection patterns work in conjunction with the light-transmitting pattern. This consolidation creates a coordinated light management system that achieves superior light gathering without requiring separate complex assemblies, thereby maintaining ease of manufacture
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
This configuration enhances luminous flux and supports high-density integration by optimizing light reflection and transmission, improving the device's ability to gather and direct emitted light effectively.
Implementation Method 1
A first light reflection pattern may be formed on the second surface
Implementation Method 2
A second light reflection pattern may be formed on side surfaces of the light-emitting chip and the first light reflection pattern
Implementation Method 3
A wavelength conversion layer may be formed on the first surface of the light-emitting chip
Implementation Method 4
A light-transmitting pattern may be formed between the light-emitting chip and the second light reflection pattern, and may extend between the first light reflection pattern and the second light reflection pattern
Data Source
AI summary
A light-emitting device includes a light-emitting chip having a first surface and a second surface. A first light reflection pattern is formed on the second surface. A plurality of terminals are disposed to be connected to the light-emitting chip by passing through the first light reflection pattern. A second light reflection pattern is formed on side surfaces of the light-emitting chip and the first light reflection pattern. A light-transmitting pattern is formed between the light-emitting chip and the second light reflection pattern and extends between the first light reflection pattern and the second light reflection pattern. A wavelength conversion layer is formed on the first surface of the light-emitting chip.