Light-Transmitting Member Bonding Layout for LED Stress Relief
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Solution Overview
Problem
In light-emitting devices, stress on the light-transmitting member is not effectively managed, leading to potential damage and instability in the bonding between the light-transmitting member and the base body.
Innovation Solution
A light-emitting device design featuring a base body with a sidewall and upper surfaces, a light-emitting element positioned within a recess, and a light-transmitting member bonded using a bonding member that is partially applied, creating a gap between the light-transmitting member and the base body to relax stress, while also using a first coating film to enhance bonding strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the light-transmitting member is fully bonded to the base body, then bonding strength is improved, but stress concentration and potential damage occur
Solution Approach 1:
The bonding member is divided into a first portion and a second portion, creating a segmented bonding structure. The first portion bonds the light-transmitting member to the base body, while the second portion extends toward the sidewall part without full contact, thereby segmenting the bonding area to reduce stress concentration while maintaining adequate bonding strength.
Solution Approach 2:
The bonding member exhibits local quality variation through its two portions: the first portion provides strong bonding contact with the base body, while the second portion reduces or eliminates contact with the sidewall part. This localized differentiation allows the bonding structure to have different properties in different regions, optimizing both bonding strength and stress management.
2Strength
If the bonding member contacts the sidewall part, then structural support is improved, but stress on the light-transmitting member increases
Solution Approach 1:
The bonding member is segmented into a first portion that provides structural support through contact with the base body, and a second portion that extends toward but does not contact the sidewall part. This segmentation allows the structure to gain support where needed while avoiding stress concentration at the sidewall interface.
Solution Approach 2:
The first portion of the bonding member acts as an intermediary between the light-transmitting member and the base body, providing structural support and stress distribution. By positioning the second portion to avoid sidewall contact, the intermediary function is optimized to reduce stress on the light-transmitting member while maintaining adequate support.
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 partial application of the bonding member reduces stress on the light-transmitting member, increases bonding force, and maintains a stable bonding state, improving the light-emitting device's durability and efficiency.
Implementation Method 1
the light-transmitting member being bonded with a portion of the first upper surface by the bonding member
Data Source
AI summary
A light-emitting device includes: a base body including: a sidewall part including a first upper surface, and a second upper surface, a periphery of the second upper surface being surrounded by the sidewall part; a light-emitting element located at the second upper surface; a bonding member located at the first upper surface; and a light-transmitting member including a lower surface, the lower surface including: a first region located above the first upper surface, and a second region located above the second upper surface. The light-transmitting member is bonded with a portion of the first upper surface by the bonding member. The light-emitting device includes a gap defined by the lower surface of the light-transmitting member, the first upper surface of the sidewall part, and the bonding member. The bonding member is bonded to the first and second regions of the lower surface of the light-transmitting member.