Light-Emitting Module With Zoned Diffusivity and Hard Cover Protection
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Solution Overview
Problem
Light-emitting modules suffer from stray light on the irradiation surface, which affects the aesthetic appearance and functionality.
Innovation Solution
A light-emitting module design featuring a cover member with a first region of lower light diffusivity and a second region of higher diffusivity, covered by a light-transmissive member with higher hardness, reduces stray light and enhances protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the cover member is made with higher light diffusivity to reduce stray light, then the aesthetic appearance improves, but the structural strength and durability deteriorate
Solution Approach 1:
The cover member is divided into two distinct regions: a first region with lower light diffusivity and a second region with higher light diffusivity. This segmentation allows different parts of the cover member to serve different functions - the first region provides structural strength while the second region reduces stray light, thereby resolving the contradiction between strength and light diffusivity.
Solution Approach 2:
Different regions of the cover member are assigned different light diffusivity properties. The first region has lower light diffusivity to maintain structural integrity, while the second region has higher light diffusivity to reduce stray light. This local differentiation of properties allows the cover member to simultaneously achieve both strength and aesthetic appearance.
2Reliability
If a protective layer is added to enhance durability, then the hardness and protection improve, but the device complexity increases
Solution Approach 1:
The light-transmissive member is integrated with the cover member to form a unified structure. The light-transmissive member covers the upper surface of the cover member and provides enhanced protection and hardness, while the integration approach minimizes the increase in device complexity by making the components work together as a single functional unit.
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 design effectively minimizes stray light, improves the aesthetic appearance, and enhances the durability of the light-emitting module.
Implementation Method 1
a lens disposed over the light source and configured to transmit light from the light source
Implementation Method 2
a second region provided around the first region and having a higher light diffusivity than a light diffusivity of the first region
Data Source
AI summary
A light-emitting module includes: a light source; a lens located over the light source and configured to transmit light from the light source; and a cover member located over the lens and having a lower surface on which the light is to be incident and an upper surface from which the light is to be emitted, where the lower surface of the cover member includes: a first region on which the light from the light source after being transmitted through the lens is to be incident, and a second region located around the first region, a light diffusivity of the second region being higher than a light diffusivity of the first region; and a light-transmissive member covering the upper surface of the cover member and having a higher hardness than a hardness of the cover member.