Wave Guide Sealing Structure to Prevent Optical Deformation
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Solution Overview
Problem
Wearable electronic devices face optical performance degradation due to self-deformation of wave guides caused by external pressure from sealing members, which also complicates assembly.
Innovation Solution
A sealing structure is implemented where the wave guide does not directly contact the sealing member, instead being supported by a bracket, reducing deformation and improving assembly by placing sealing members between the bracket and the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wave guide is directly pressed through the sealing member to achieve sealing, then sealing effectiveness is improved, but the wave guide undergoes self-deformation due to pressing force, distorting total reflection condition and deteriorating optical performance
Solution Approach 1:
A support structure (bracket) is introduced as an intermediary between the sealing member and the wave guide. The sealing member presses against the bracket instead of directly against the wave guide, while the bracket transmits the necessary pressing force to achieve sealing. This mediator protects the wave guide from direct pressing force that causes deformation, maintaining optical performance while achieving effective sealing.
2Reliability
If the wave guide is positioned through the sealing member with designated compressive force, then sealing is achieved, but assembly of the wave guide becomes difficult
Solution Approach 1:
The bracket serves as a positioning intermediary that simplifies assembly. During assembly, the wave guide can be positioned on the bracket more easily than directly through the sealing member. The bracket provides a stable mounting surface and alignment reference, making the assembly process simpler while the sealing member applied to the bracket achieves the required sealing force.
3Reliability
If the sealing member is pressed to have designated compressive force, then sealing effectiveness is improved, but the wave guide experiences self-deformation and total reflection condition is distorted
Solution Approach 1:
The bracket acts as a force-distributing intermediary between the sealing member and the wave guide. It receives the compressive force from the sealing member and distributes it in a manner that achieves effective sealing without concentrating excessive force on the wave guide. This protects the wave guide's structural integrity and maintains the precision of its total reflection condition.
Solution Approach 2:
The bracket may incorporate flexible or compliant elements that allow controlled deformation under compressive force. These flexible components absorb excess pressing force and prevent rigid transmission of high stress to the wave guide, thereby protecting the wave guide's optical properties while still achieving adequate sealing pressure.
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 enhances optical performance by minimizing deformation of the wave guide and simplifies assembly, reducing light leakage and maintaining optical integrity.
Implementation Method 1
wave guide formed and disposed to close rim-shaped openings formed in the housing and to satisfy a total reflection condition
Data Source
AI summary
An example wearable electronic device may include a housing including a first rim housing and a second rim housing coupled to form at least one opening; at least one bracket including a first surface facing the first rim housing and a second surface facing the second rim housing and disposed in a first space between the first rim housing and the second rim housing; at least one wave guide overlapped with the at least one opening and disposed to be at least partially supported by the at least one bracket; at least one display module disposed in a second space adjacent to the first space between the first rim housing and the second rim housing and disposed to face the at least one wave guide through the at least one bracket; a first sealing member disposed between the at least one bracket and the first rim housing; and a second sealing member disposed between the at least one bracket and the second rim housing.