Light Emitting Device with Base-Covered Protective Element
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Light emitting devices with surface mounting type face challenges in size reduction due to the need for space to accommodate protective elements and bonding wires, leading to reduced light efficiency as the protective elements absorb or block emitted light.
Innovation Solution
A light emitting device design where a protective element is mounted on an electrically conductive member and a base, with the protective element entirely or partially covered by the base, allowing the light emitting element to be positioned closer to the device's opening, reducing light absorption and enabling a compact, high-efficiency design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective element is provided in the vicinity of the light emitting element on the support body, then electrostatic discharge tolerance is improved, but the device size increases due to the need for sufficient mounting space and bonding wires
Solution Approach 1:
The protective element is mounted on the back surface of the base, which is itself mounted on the support body. This nested arrangement allows the protective element to be housed within the existing structural footprint of the base, eliminating the need for additional lateral space that would otherwise be required for separate mounting of the protective element alongside the light emitting element.
2Reliability
If a protective element is provided in the vicinity of the light emitting element, then electrostatic discharge tolerance is improved, but light extraction efficiency decreases due to absorption or blocking of emitted light
Solution Approach 1:
The protective element is positioned on the back surface of the base, which is opposite to the light-emitting side. This spatial relocation moves the protective element from the light extraction path (front dimension) to the opposite dimension, allowing light to pass through the base without being absorbed or blocked by the protective element, thereby maintaining high light extraction efficiency while still providing electrostatic discharge protection.
Data Source
AI summary
To provide a light emitting device that is compact and has high efficiency of extracting light comprising a support body that incorporates a light emitting element.The light emitting device has the protective element 106 mounted on the electrically conductive member 103a and the base 105 mounted on the electrically conductive member 103a, while at least part of the protective element 106 is covered with the base 105, and the light emitting element 104 is mounted on the top surface of the base 105.