Light Emitting Module Electrode Segmentation for Thermal Management
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Solution Overview
Problem
Existing light emitting modules with slim and thin wiring layers suffer from deteriorated heat dissipation performance, leading to solder spread defects and thermal damage during soldering, which compromises the reliability and durability of the product.
Innovation Solution
A light emitting module with an electrode layer comprising insulated blocks and an electrode separating line that directs heat emission, along with an isolation part to prevent rapid heat transfer and a solder spread defect, enhancing heat dissipation and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a slim and thin wiring layer is used to mount light emitting elements, then the device can be miniaturized and integrated, but heat dissipation performance deteriorates
Solution Approach 1:
The electrode layer is divided into multiple blocks (first block, second block, third block, etc.) that are insulated from each other by electrode separating lines. This segmentation allows heat to be dissipated through multiple separate pathways rather than a single continuous layer, improving heat dissipation performance while maintaining the compact device structure.
2Reliability
If a solder member is welded to a solder pad, then electrical connection is established, but rapid heat discharge causes solder spread defect
Solution Approach 1:
An isolation part is introduced between the solder pad and the electrode block as a thermal barrier. This intermediary structure prevents rapid heat discharge from the solder pad to the electrode block during soldering, allowing the solder member to spread evenly on the solder pad without cooling too quickly, while still enabling electrical connection through the electrode block.
3Ease of manufacture
If excessive heat is transferred through the wiring layer during long-time soldering, then soldering work can be completed, but the light emitting element is destroyed by thermal damage
Solution Approach 1:
The electrode layer is segmented into multiple insulated blocks with electrode separating lines between them. This segmentation creates thermal barriers that limit excessive heat transfer through the wiring layer during long-time soldering operations, protecting the light emitting elements from thermal damage while still allowing soldering to be completed.
Solution Approach 2:
The electrode separating lines act as thermal intermediaries or barriers between adjacent electrode blocks. During long-time soldering, these separating lines prevent excessive heat from transferring through the entire wiring layer, thereby protecting the light emitting elements from thermal damage while enabling the soldering process to complete.
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 improves heat dissipation performance, prevents solder spread defects, and significantly enhances the reliability and durability of the product by minimizing heat transfer during soldering.
Implementation Method 1
heat generated from the light emitting elements is emitted through the blocks
Implementation Method 2
partially blocking heat of a solder pad part transferred to the blocks using an isolation part
Data Source
AI summary
Disclosed herein are a light emitting module and a lighting device that may be used for a display application or a lighting application. The light emitting module includes an electrode layer including a plurality of blocks that are insulated from each other by an electrode separating line; and one or more light emitting elements mounted on the electrode layer so as to be electrically connected to any one block of the blocks of the electrode layer and a neighboring block, respectively, wherein the blocks have another neighboring block disposed in a first direction and still another neighboring block disposed in a second direction, based on any one block of the blocks while having the electrode separating line formed to be bent more than once at a predetermined interval therebetween so that heat generated from the light emitting elements is emitted through the blocks.