Electrodeless Pad Array Layout for Flexible LED Circuit Topology
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Solution Overview
Problem
Conventional light emitting diode packages face limitations in circuit configuration flexibility and space utilization due to pre-determined connections, leading to design difficulties and inefficient space usage.
Innovation Solution
A light emitting apparatus with an electrodeless pad array that allows for flexible circuit configurations, including series, parallel, or series-parallel connections, by using a base substrate with circuits, pads, and an electrodeless pad array arranged in specific patterns to optimize space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pre-determined circuit connections are used in conventional LED packages, then manufacturing simplicity is maintained, but circuit configuration flexibility deteriorates
Solution Approach 1:
The invention divides the base substrate into multiple independent pad regions (first pad, second pad, third pad, fourth pad) that can be independently connected to different light emitting diodes. This segmentation allows flexible circuit configuration (series, parallel, or series-parallel connections) without requiring complex external circuitry, as each pad can be selectively connected to achieve the desired circuit topology.
2Adaptability or versatility
If external circuitry or stacked circuit boards are used to achieve flexible connections, then circuit configuration flexibility improves, but space utilization deteriorates
Solution Approach 1:
The invention merges the circuit configuration function directly into the base substrate by integrating multiple pads and connection paths within the same substrate plane. This eliminates the need for separate external circuit boards or stacked configurations, achieving flexible circuit connections while maintaining compact packaging and efficient space utilization.
3Adaptability or versatility
If multiple pads are disposed on the base substrate, then circuit configuration flexibility improves, but thermal resistance increases
Solution Approach 1:
The invention introduces a reflective layer as an intermediary between the pads and the underlying structure. This reflective layer serves dual functions: it enables thermal management by directing heat away from the pad regions while maintaining electrical isolation, and it allows the pads to be disposed in various patterns for flexible circuit configuration without compromising thermal performance.
Data Source
AI summary
A light emitting apparatus is disclosed. The light emitting apparatus includes: a base substrate; a plurality of circuits disposed on an upper side of the base substrate; a light emitting source included in at least one circuit among the plurality of circuits; a first pad and a second pad disposed on a lower side of the base substrate and contacting one electrode or another electrode of each of the plurality of circuits; and an electrodeless pad array disposed on the lower side of the base substrate. The number of electrodeless pads included in the electrodeless pad array is determined based on a number of the plurality of circuits.