Light-emitting device with discrete conductive wiring and dual-base heat dissipation
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Solution Overview
Problem
Conventional light-emitting devices with a surface mount-type COB structure lack flexibility in connecting light-emitting elements, limiting their configuration options and efficiency in heat dissipation and cost-effectiveness.
Innovation Solution
A light-emitting device with conductive-wiring parts discretely formed along the base, allowing for flexible connections (series, parallel, or series-parallel) of light-emitting elements, and a dual-base structure for optimized material usage and heat dissipation, where the first base is made of low-cost materials and the second base is made of heat-dissipating materials like ceramic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light-emitting elements are arranged in a recessed region along the length direction of a metal base with conductor patterns, then the light-emitting device can be used in edge light type backlights and straight tube type LED lamps, but the connection configuration between light-emitting elements is limited and lacks flexibility
Solution Approach 1:
The conductive-wiring structure is segmented into multiple discrete conductive-wiring parts arranged in arrays on both sides of the light-emitting elements. Each conductive-wiring part can independently connect to light-emitting element electrodes, enabling flexible configuration choices (series, parallel, or series-parallel connections) without requiring complex continuous wiring patterns.
Solution Approach 2:
The conductive-wiring parts are arranged in two-dimensional arrays on both the first and second sides of the light-emitting element array, transitioning from one-dimensional conductor patterns to two-dimensional discrete wiring parts. This dimensional expansion provides multiple connection paths and configurations, significantly enhancing connection flexibility.
2Temperature
If a single metal base is used for mounting light-emitting elements, then the structure is simple, but heat dissipation performance is insufficient
Solution Approach 1:
The base structure uses a composite material system combining a metal base (first base) for structural support and electrical conductivity, and a ceramic base (second base) for superior heat dissipation. This composite construction leverages the complementary thermal and mechanical properties of different materials to achieve both structural integrity and effective heat management.
Solution Approach 2:
Different regions of the base structure are assigned different materials with optimized properties: the metal base provides structural strength and electrical conductivity where needed, while the ceramic base provides enhanced heat dissipation in regions requiring thermal management. This localized material optimization addresses specific functional requirements in different areas of the device.
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 versatile connection configurations, improved heat dissipation, and cost-effective production by allowing multiple connection methods and using materials that enhance thermal and optical performance.
Implementation Method 1
The conductive-wiring parts are discretely formed along the predetermined direction of the base, each of the conductive wiring parts relaying electrical connection between the light-emitting elements
Implementation Method 2
the second base is made of heat-dissipating materials like ceramic
Data Source
AI summary
A light-emitting device including: a base; light-emitting elements arranged on the base at intervals in an array along a predetermined direction of the base; and conductive-wiring parts formed on first and second sides of the array of the light-emitting elements on the base. The conductive-wiring parts are discretely formed along the predetermined direction of the base, each of the conductive-wiring parts relaying electrical connection between the light-emitting elements, and the number of the conductive-wiring parts arranged per light-emitting element on each of the first and second sides of the array of the light-emitting elements is two or more.