Light Emitting Device Retaining Member Fixation
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Solution Overview
Problem
Conventional light emitting devices face challenges in fixing the wavelength conversion member securely without reducing light emission intensity and are prone to dimensional deviations during manufacturing, leading to potential light absorption and reduced productivity.
Innovation Solution
A light emitting device design featuring a base member, a laser element, a retaining member with a reflective through hole, and first and second fixing members that clamp the retaining member, allowing for secure fixation and efficient light extraction while accommodating dimensional deviations, thereby preventing light absorption and ensuring high productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engaging member directly holds down the wavelength conversion member, then the wavelength conversion member is securely fixed, but part of light from the wavelength conversion member is absorbed by the engaging member, reducing light emission intensity
Solution Approach 1:
A reflective member is introduced as an intermediary between the engaging member and the wavelength conversion member. The reflective member has a reflective surface facing the wavelength conversion member, which reflects light that would otherwise be absorbed by the engaging member back toward the light extraction direction, thereby maintaining light emission intensity while ensuring secure fixation
Solution Approach 2:
The reflective member is positioned at an angle relative to the wavelength conversion member, creating a three-dimensional light path arrangement. This angular positioning allows the reflective member to redirect light in a different spatial dimension, preventing absorption by the engaging member while maintaining structural stability
2Ease of manufacture
If the dimension of the wavelength conversion member or engaging member deviates from design value, then manufacturing flexibility is improved, but fixing becomes difficult
Solution Approach 1:
The engaging member is designed with adjustable parameters including variable thickness and flexible engagement structure depth. These parameter changes allow the engaging member to accommodate dimensional deviations in the wavelength conversion member while maintaining reliable fixation, bridging the gap between manufacturing flexibility and fixation reliability
3Device complexity
If the engaging member structure is simplified, then device complexity is reduced, but light absorption by the engaging member increases
Solution Approach 1:
The reflective member is strategically positioned only in the region where light reflection is needed, with its reflective surface oriented specifically toward the wavelength conversion member. This localized placement ensures that light absorption by the engaging member is prevented without requiring complex structures throughout the entire device, maintaining simplicity while improving light emission intensity
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 effectively prevents light absorption by the fixing members, maintains light emission intensity, and ensures stable fixation despite dimensional deviations, enhancing the device's productivity and scalability.
Implementation Method 1
The retaining member has a light reflective inner wall defining a through hole
Data Source
AI summary
A light emitting device includes a base member, a laser element, a retaining member, a fluorescent member, and first and second fixing members. The retaining member has a first surface on a laser element side and a second surface not on the laser element side. The fluorescent member is fixed to a through hole of the retaining member. The first and second fixing members clamp the retaining member. The first and second fixing members have first and second contact surfaces in contact with the first and second surfaces of the retaining member, respectively. A distance between the first and second contact surfaces becomes smaller as the first and second contact surfaces become farther from the through hole. The retaining member, the first and second fixing members are arranged such that a space surrounded by the retaining member, and the first and second fixing members exists around the retaining member.