Front Light Module Waterproof Structure for Controlled Glue Sealing
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Solution Overview
Problem
Existing front light modules in reflective display devices face issues with maintaining waterproof performance due to gaps in glue injection channels, leading to water vapor entry and potential short circuits in LED light sources.
Innovation Solution
The design incorporates an extending portion on the light guide plate edge and a concave portion in the second waterproof layer, allowing for a longer glue injection channel, with a third waterproof layer surrounding the extending portion, ensuring controlled glue injection and improved waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If waterproof glue is used to seal the waterproof materials, then waterproof performance is improved, but the glue injection channel is too short and the area for glue injection is difficult to be controlled, causing process risks to form gaps
Solution Approach 1:
The patent introduces a groove structure on the waterproof material that extends in a direction perpendicular to the light guide plate surface. This groove creates an extended glue injection channel by utilizing the vertical dimension, allowing the waterproof glue to flow along the groove and form a proper sealing layer without requiring a longer horizontal channel design.
2Reliability
If many different waterproof materials are used to form a waterproof periphery, then waterproof performance is improved, but small gaps may exist between different waterproof materials
Solution Approach 1:
The patent introduces a groove structure as an intermediary element between the waterproof material and the waterproof glue. The groove acts as a mediator that guides the waterproof glue to fill the gaps between different waterproof materials, ensuring proper sealing and eliminating the harmful gaps that would otherwise exist between the waterproof periphery components.
3Ease of manufacture
If the glue injection channel is made longer, then glue injection area is easier to control, but the structure becomes more complex
Solution Approach 1:
Instead of increasing the horizontal length of the glue injection channel, the patent utilizes the vertical dimension by creating a groove that extends perpendicular to the light guide plate surface. This approach achieves a longer effective glue injection path without adding horizontal complexity to the overall device structure.
Data Source
AI summary
A front light module includes a light guide plate, a light source, first waterproof layers, a second waterproof layer, and a third waterproof layer. An edge of the light guide plate has an extending portion. The light source is located on the edge of the light guide plate. There are two first waterproof layers respectively located on a bottom surface and a top surface of the light guide plate. The second waterproof layer has a concave portion. The light source is located between the second waterproof layer and the edge of the light guide plate, and the extending portion of the light guide plate extends into the concave portion of the second waterproof layer. The third waterproof layer is located in the concave portion of the second waterproof layer and surrounds the extending portion of the light guide plate.