Light Emitting Device Reflecting Member Spacing
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Solution Overview
Problem
Current light emitting devices face limitations in light extraction efficiency due to the contact between light reflecting members and the lateral surfaces of the light emitting elements, which reduces the overall performance and light distribution characteristics.
Innovation Solution
The design incorporates a light reflecting member that covers the conductive members away from the light emitting element, utilizing a fusible bonding member with specific geometric configurations to prevent contact and a resin member with higher wettability on conductive members, enhancing light extraction efficiency and reducing discoloration of the conductive members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light reflecting member is provided inside the recess of the case, then the reflection of light emitted from the light emitting element is improved, but the lateral surfaces of the light emitting element come into contact with the light reflecting member, which blocks light and reduces light extraction efficiency
Solution Approach 1:
The light reflecting member is divided into a first light reflecting member and a second light reflecting member positioned at different locations. The first light reflecting member is positioned to reflect light from the bottom surface, while the second light reflecting member is positioned further away to reflect light from the lateral surfaces without causing contact, thereby segmenting the light reflection function to avoid blocking
Solution Approach 2:
The patent positions light reflecting members in different spatial dimensions - the first light reflecting member is positioned near the bottom surface in the vertical dimension, while the second light reflecting member is positioned at a greater distance in the horizontal dimension. This dimensional arrangement allows both members to reflect light effectively without interfering with each other or blocking the light path
2Ease of manufacture
If the bonding member thickness is reduced to improve assembly, then manufacturing is easier, but the light reflecting member may contact the light emitting element lateral surfaces, blocking light
Solution Approach 1:
The patent performs preliminary positioning by providing guide protrusions on the bonding member that fit into guide recesses on the light emitting element before final assembly. This preliminary action ensures correct positioning and prevents the light reflecting member from contacting the light emitting element lateral surfaces, maintaining light distribution characteristics while facilitating easy assembly
Solution Approach 2:
The bonding member acts as an intermediary element between the light emitting element and the light reflecting member. By designing the bonding member with specific thickness and guide features, it mediates the assembly process to ensure proper spacing and positioning, preventing direct contact between the light reflecting member and light emitting element while maintaining manufacturing ease
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 improves light extraction efficiency and widens the light distribution characteristics by preventing light from the lateral surfaces from being blocked, while maintaining the thickness of bonding members to avoid contact with the light reflecting member.
Implementation Method 1
a light reflecting member that covers the conductive members away from the light emitting element, utilizing a fusible bonding member
Implementation Method 2
a resin member with higher wettability on conductive members, enhancing light extraction efficiency
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A light emitting device includes: a light emitting element including a first electrode and a second electrode; a base equipped with a first conductive member and a second conductive member; a first bonding member electrically connecting the first electrode and the first conductive member, and a second bonding member electrically connecting the second electrode and the second conductive member; and one or more light reflecting members covering at least a part of the first conductive member and the second conductive member. The one or more light reflecting members are disposed in contact with the first bonding member and the second bonding member while being away from the light emitting element.