Optical Device Stepped Blocking Portion Prevents Adhesive Spread
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Solution Overview
Problem
In light source modules, the adhesive used during lens attachment to a substrate can cause non-uniform light emission, leading to optical uniformity defects such as Mura in lighting and display devices due to the altered light path and non-uniform light distribution.
Innovation Solution
An optical device with a support portion and a blocking portion is used, where the blocking portion is stepped with respect to the surface and has a groove structure to prevent adhesive spread, ensuring uniform light emission by controlling the adhesive's movement and maintaining optical uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is spread to attach the lens to the substrate, then the lens is firmly fixed to the substrate, but the adhesive alters the light path and causes non-uniform light distribution
Solution Approach 1:
The harmful adhesive is extracted and removed from the optical path area. The lens is attached to the substrate using mechanical attachment structures (protrusions and recesses) instead of adhesive, eliminating the source of light path alteration and non-uniform light distribution while maintaining firm attachment
Solution Approach 2:
The attachment structure is segmented into discrete protrusions on the lens and corresponding recesses on the substrate. This segmentation allows for localized mechanical attachment points that secure the lens without requiring widespread adhesive application that would interfere with light distribution
2Strength
If adhesive is applied during lens attachment, then the lens is secured to the substrate, but light emitted by the light source proceeds along a changed light path
Solution Approach 1:
The adhesive is completely removed from the system and replaced with mechanical attachment structures. This extraction eliminates any material that could alter the light path, allowing light to travel in straight lines from the light source through the lens without deviation caused by adhesive layers
Solution Approach 2:
Mechanical attachment structures (protrusions and recesses) serve as intermediaries between the lens and substrate. These structures provide the necessary mechanical coupling without interfering with the optical path, as they are positioned at the periphery and do not obstruct light transmission
3Strength
If adhesive is spread to attach the lens, then the lens is fixed to the substrate, but light emitted outwardly from the lens is not uniformly spread
Solution Approach 1:
The adhesive is removed from the optical system and replaced with peripheral mechanical attachment structures. This allows the lens surface to remain clean and free of adhesive contamination, ensuring uniform light distribution across the entire lens surface without localized variations caused by adhesive presence
Solution Approach 2:
The attachment function is localized to specific peripheral regions through protrusions and recesses, while the central optical regions remain free of attachment materials. This local differentiation allows the optical areas to maintain uniform light distribution properties while the peripheral attachment areas provide mechanical securing
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 adhesive spread and ensures uniform light emission, enhancing optical uniformity and reducing defects like Mura in lighting and display devices.
Implementation Method 1
wide beam angle lenses are used to spread light laterally over a wide region from a central portion thereof, using refraction
Data Source
AI summary
An optical device and a light source module including the same are provided. The optical device includes a first surface having an incident portion; a second surface emitting light incident through the incident portion outwardly; a support portion protruding from the first surface; and a blocking portion surrounding an outer portion of the support portion, the blocking portion being stepped with respect to the first surface.