Multi-Submount Light-Emitting Module for Surge Protection
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Solution Overview
Problem
Existing light-emitting modules face challenges in optimizing the mounting aspects of multiple light-emitting elements, particularly in ensuring efficient light emission and protection against surge voltages, while also aiming for a compact design.
Innovation Solution
A light-emitting module design featuring a wiring substrate with specific alignment and connection patterns, multiple submounts, and varying numbers of light-emitting elements, along with protective elements like Zener diodes, to enhance light emission and protection, while maintaining a small form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple light-emitting elements are mounted on a single wiring substrate with the same package shape, then the mounting structure is simplified, but the light emission efficiency and protection capability cannot be optimized for each device
Solution Approach 1:
The patent divides the light-emitting devices into two distinct types (first light-emitting device and second light-emitting device) with different package shapes and different numbers of light-emitting elements. This segmentation allows each device type to be optimized independently for its specific function, with the first device having three light-emitting elements and the second device having four light-emitting elements, thereby resolving the contradiction between structural simplicity and functional optimization.
2Volume of moving object
If a compact light-emitting device is designed, then the module size is reduced, but the space for arranging protective elements and light-emitting elements is limited
Solution Approach 1:
The patent utilizes the vertical dimension by stacking multiple submounts (first submount and second submount) above the wiring substrate. This three-dimensional arrangement allows protective elements and light-emitting elements to be positioned at different heights and locations, maximizing the use of available space within a compact footprint while maintaining proper spacing and connection pathways.
3Illumination intensity
If the number of light-emitting elements is increased, then the light emission capability is enhanced, but the device size and complexity increase
Solution Approach 1:
The patent applies different configurations of light-emitting elements to different device types based on their specific requirements. The first light-emitting device has three light-emitting elements arranged in a specific pattern, while the second light-emitting device has four light-emitting elements in a different arrangement. This localized optimization allows each device to achieve the necessary light emission capability without unnecessarily increasing the overall device size.
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 achieves effective light emission and protection against surge voltages, facilitating efficient light transmission and compactness in the module.
Implementation Method 1
the laser element can be protected from a surge voltage or the like by arranging the Zener diode
Implementation Method 2
three or more first light-emitting elements arranged respectively on the first submounts, and four or more second light-emitting elements arranged respectively on the second submounts
Data Source
AI summary
A light-emitting module includes a wiring substrate, first and second bases, three or more first submounts, four or more second submounts, three or more first light-emitting elements, and four or more second light-emitting elements. The first and second bases are bonded to and electrically connected to the wiring substrate. The first submounts are arranged side by side along a first alignment direction on the first base, and the second submounts are arranged side by side along a second alignment direction on the second base. A number of the second submounts is greater than a number of the first submounts by one or more. The first and second light-emitting elements are arranged respectively on the first and second submounts. A length of each of the first submounts in the first alignment direction is greater than a length of each of the second submounts in the second alignment direction.