Light Emitting Module UV Shielding Ceramic Structure
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Solution Overview
Problem
Light emitting modules with UV LEDs face issues of adhesive member discoloration or alteration due to heat and UV rays, affecting the reliability and durability of the module.
Innovation Solution
The module incorporates a ceramic-based structure with specific cavity designs and materials that block UV rays and heat, preventing discoloration of the adhesive member by using ceramic layers and reflective coatings to isolate the adhesive from the light source unit's emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If UV LED is used as light source, then high luminous efficiency and long life are achieved, but adhesive member discoloration and alteration occur due to UV rays and heat
Solution Approach 1:
A reflective member is introduced as an intermediary component positioned between the UV LED light source and the adhesive member. This reflective member reflects UV rays and heat away from the adhesive member, preventing direct exposure while maintaining the structural integrity and coherence of the light emitting module assembly.
Solution Approach 2:
The reflective member converts harmful UV rays and heat that would otherwise damage the adhesive member into beneficial reflected light that can be directed toward the optical member. This transforms the harmful thermal and UV radiation into useful optical output while protecting the adhesive joint.
2Ease of manufacture
If adhesive member is used to couple body and optical member, then assembly is simplified, but adhesive member deteriorates due to exposure to UV rays and heat
Solution Approach 1:
The reflective member serves as a protective intermediary that shields the adhesive member from direct contact with UV rays and heat. This allows the adhesive member to maintain its chemical stability and bonding function without deteriorating, while still enabling simplified assembly through adhesive bonding.
3Device complexity
If direct coupling of body and optical member is used, then structure is simplified, but UV rays and heat directly affect adhesive member causing discoloration
Solution Approach 1:
The reflective member is positioned as an intermediary component that does not significantly increase structural complexity while effectively blocking UV rays and heat from reaching the adhesive member. It is integrated into the existing assembly structure, maintaining simplicity while providing protective functionality.
Solution Approach 2:
The reflective member converts harmful UV radiation and heat into useful reflected light that enhances the optical output of the module. This dual function protects the adhesive member while improving or maintaining the luminous efficiency of the overall system.
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
This solution effectively prevents discoloration and alteration of the adhesive member, enhancing the durability and reliability of the light emitting module by blocking UV rays and heat, thus maintaining coherence between the body and optical member.
Implementation Method 1
a reflective member disposed between the light source unit and the adhesive member
Data Source
Figure 1
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AI summary
An embodiment relates to a light emitting module. A light emitting module according to an embodiment comprises: a light source unit comprising a light emitting device; a body comprising a lower portion on which the light source unit is arranged, a wall portion arranged on the lower portion and configured to surround the light source unit, and an upper portion arranged on the wall portion; an optical member arranged on the light source unit to transmit light from the light emitting device; and an adhesive member arranged between the wall portion of the body and the optical member to couple the body and the optical member, wherein the upper portion of the body is arranged between the light emitting device and the adhesive member.