Waterproof LED Module with Adhesive Fixation and Alignment
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Solution Overview
Problem
Existing light-emitting modules lack waterproof structures, making them vulnerable to moisture-induced circuit shorts or corrosion, and the bonding materials used to align light guide plates with circuit boards often have insufficient thickness for secure fixation.
Innovation Solution
A waterproof light emitting diode device and module are designed with a waterproof layer comprising adhesives, single-sided or double-sided adhesive tapes, and substrates to cover non-light emitting surfaces of the light emitting diode, ensuring protection from moisture while maintaining optimal light utilization efficiency by aligning the center of the light guide plate with the light emitting diode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a bonding material is used to assemble the light guide plate to the circuit board, then the light guide plate can be aligned with the circuit board, but the bonding material has insufficient thickness and fails to securely fix the light guide plate and circuit board
Solution Approach 1:
The patent merges the alignment function and fixation function into a single integrated structure. The light guide plate itself is designed with a protrusion that fits into a corresponding recess on the circuit board, combining precise alignment and secure fixation in one structural feature rather than relying on separate bonding material layers.
Solution Approach 2:
The patent introduces a waterproof layer as an intermediary component between the light guide plate and circuit board. This waterproof layer not only provides moisture protection but also serves as an additional bonding interface that enhances fixation strength while maintaining alignment precision through its adhesive properties.
2Device complexity
If existing light-emitting modules are used without waterproof structures, then the device complexity is reduced, but the modules are vulnerable to moisture causing circuit short or corrosion
Solution Approach 1:
The waterproof layer is designed to perform multiple functions simultaneously: it provides moisture protection, enhances bonding between components, and maintains alignment precision. This multi-functionality reduces the need for separate dedicated waterproofing components, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent employs a thin film waterproof layer that conformally covers the light emitting diode and surrounding areas. This thin film approach provides effective moisture protection without adding significant structural complexity or thickness to the overall device assembly.
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 effectively prevents moisture damage to the light emitting diode and securely fixes the light guide plate and circuit board, ensuring reliable operation and maintaining desired optical characteristics with minimal light loss.
Implementation Method 1
the waterproof layer includes an adhesive
Implementation Method 2
the substrate is fixed on the light guide plate through the double-sided adhesive tape
Implementation Method 3
the substrate is fixed on the circuit board through the double-sided adhesive tape
Data Source
AI summary
A waterproof light emitting module includes a circuit board, a light emitting diode, a light guide plate, first, second, and third waterproof layers. The light emitting diode is over the circuit board and has a light emitting surface, and first and second non-light emitting surfaces. The light emitting surface is opposite to the first non-light emitting surface. The second non-light emitting surface is between the light emitting surface and the first non-light emitting surface. A center of the light guide plate is substantially aligned with a center of the light emitting diode along a direction perpendicular to the light emitting surface. The light emitting diode is between the first waterproof layer and the light guide plate. The second waterproof layer covers the second non-light emitting surface. The third waterproof layer is between the second waterproof layer and the light guide plate.