Optical Module Lens Damage Detection and Laser Power-Off Mechanism
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Solution Overview
Problem
Mobile phone laser optical modules lack a power-off mechanism, risking direct laser exposure to human eyes if damaged, potentially causing injury.
Innovation Solution
An optical module design featuring a first support element, conductive paths, a lens, and a light-emitting element, where the lens is electrically connected to conductive paths that detect resistance differences upon damage, triggering the light-emitting element to switch off and prevent eye injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the laser optical module operates without a power-off mechanism, then the functionality and productivity are improved, but the safety risk increases when the lens is damaged
Solution Approach 1:
The patent applies preliminary action by pre-installing conductive paths on the lens and configuring the control circuit to detect resistance changes before actual damage occurs. When the lens is intact, the conductive paths provide a specific resistance value that keeps the laser on. Upon damage, the resistance changes, triggering automatic power-off before harmful exposure can occur.
Solution Approach 2:
The patent implements feedback through a control circuit that continuously monitors the resistance of conductive paths on the lens. The circuit receives real-time resistance signals, compares them against predetermined thresholds, and automatically adjusts the laser power state accordingly, creating a closed-loop safety system.
2Reliability
If conductive paths are added to detect lens damage, then the safety is improved, but the device complexity increases
Solution Approach 1:
The patent merges the safety detection function with existing optical components by integrating conductive paths directly onto the lens surface. This combination approach allows the lens to serve both its optical function and its safety sensing function simultaneously, reducing the need for separate detection components.
Solution Approach 2:
The lens is designed with multi-functionality by incorporating conductive paths that enable both optical transmission and damage detection. This universal design allows a single component to fulfill multiple roles: maintaining optical performance while providing structural integrity monitoring and safety detection.
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
Effectively prevents laser light from entering human eyes by detecting lens damage and automatically switching off the light-emitting element, ensuring eye safety.
Implementation Method 1
When a resistance difference is detected through the first and second conductive paths, the light-emitting element is switched off
Data Source
AI summary
An optical module for protecting human eyes includes a first support element, first conductive paths, a lens, at least one second conductive path, and a light-emitting element. The first support element has a bottom plate and a sidewall on the bottom plate. The first conductive paths are in the first support element or outside the first support element. Each of the first conductive paths has a first end adjacent to a top surface of the sidewall and a second end adjacent to the bottom plate. The lens is located on the top surface of the sidewall. The second conductive path is electrically connected to the first ends of the first conductive paths. The light-emitting element is located on the bottom plate of the first support element. When a resistance difference is detected through the first and second conductive paths, the light-emitting element is switched off.