Segmented Lens Layout With Reflector for Light Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current light-emitting devices face limitations in achieving high light extraction efficiency, particularly due to the absorption of light by the support and the internal structure of the device, which hampers the overall performance and efficiency of light emission.
Innovation Solution
The proposed light-emitting device incorporates a support with light-emitting elements aligned in a specific direction, a light-transmissive member with lens portions and connecting portions, and a reflective member that overlaps the connecting portion, enhancing light extraction efficiency by reducing absorption and increasing the surface area for light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional light-emitting device structure is used, then the device is simple in structure, but the light extraction efficiency is low due to light absorption by the support and internal structure
Solution Approach 1:
The light-transmissive member is divided into multiple lens portions (first lens portion, second lens portion, third lens portion) with connecting portions between them. Each lens portion is positioned over specific light-emitting elements, creating a segmented structure that reduces light absorption by the support while maintaining structural integrity and improving light extraction efficiency.
Solution Approach 2:
A reflective member is introduced as an intermediary component positioned between the support and the light-transmissive member. This reflective member redirects light that would otherwise be absorbed by the support, directing it toward the light-transmissive member for extraction, thereby improving light extraction efficiency without complicating the overall device structure.
2Area of stationary object
If the light-emitting area is increased to improve light output, then the surface area for light emission increases, but light absorption by the support and internal structure also increases
Solution Approach 1:
The reflective member converts the harmful effect of light absorption by the support into a beneficial effect by redirecting the absorbed or scattered light toward the light-transmissive member. This allows the support structure to serve dual purposes: providing mechanical support while also acting as a light-redistributing element that improves overall light extraction efficiency.
Solution Approach 2:
The patent introduces a vertical dimension to light management by positioning the reflective member below the light-transmissive member and using multiple lens portions at different positions. This three-dimensional arrangement allows light to be extracted from multiple zones and angles, increasing the effective light-emitting area while minimizing support absorption through strategic light redirection.
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 configuration significantly improves light extraction efficiency by minimizing absorption and maximizing the surface area for light emission, leading to enhanced performance and efficiency in light-emitting devices.
Implementation Method 1
a reflective member overlapping the first connecting portion in a top view
Implementation Method 2
a light-transmissive member including a first lens portion overlapping the first light-emitting element in a top view, a second lens portion overlapping the second light-emitting element in a top view, and a first connecting portion connecting the first lens portion and the second lens portion
Data Source
AI summary
A light-emitting device includes a support; a first light-emitting element and a second light-emitting element aligned in a first direction and located on the support; a light-transmissive member including a first lens portion overlapping the first light-emitting element in a top view, a second lens portion overlapping the second light-emitting element in a top view, and a first connecting portion connecting the first lens portion and the second lens portion; and a reflective member overlapping the first connecting portion in top view.