Light Source Safety Mechanism with Intersecting Conductive Films

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Solution Overview

Problem

Conventional light source devices lack a safety mechanism to prevent eye damage when the wavelength converting device is damaged, allowing laser beams to penetrate and cause harm.

Innovation Solution

A light source device with a safety mechanism that includes a wavelength converting device with a substrate, optical converting layer, and a safety examination layer featuring intersecting conductive films, which measures changes in current or resistance to automatically shut off the laser light source if damage is detected.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional light source device uses a wavelength converting device without a safety mechanism, then the device structure is simple, but the safety is poor and laser beams can penetrate through damaged components causing eye damage

Engineering Contradiction:

ImprovesafetyVSAvoiddevice structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by incorporating a safety examination layer with conductive films before the optical converting layer. This layer proactively monitors the integrity of the wavelength converting device through electrical resistance measurements, detecting damage before it can cause harm. The safety mechanism is built in advance rather than added as a reactive measure, allowing the system to prevent laser penetration before eye damage can occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The safety examination layer with intersecting conductive films serves as an intermediary between the laser light source and the optical converting layer. This intermediate layer provides a monitoring function that detects damage to the wavelength converting device through changes in electrical resistance, acting as a mediator that prevents harmful laser beams from reaching users while maintaining the overall device structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a safety examination layer with intersecting conductive films is added to detect damage, then the safety and reliability improve, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

ImprovesafetyVSAvoidmanufacturing process

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the safety examination function with the existing device structure by integrating conductive films directly into the wavelength converting device layers. The safety examination layer is combined with the optical converting layer in a single integrated structure, eliminating the need for separate safety components and reducing manufacturing steps. This merging approach allows safety functionality to be achieved without significantly increasing manufacturing complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The conductive films in the safety examination layer serve multiple functions: they provide structural support, enable electrical resistance monitoring for damage detection, and maintain the integrity of the wavelength converting device. This multi-functionality reduces the need for additional components and simplifies the overall manufacturing process while enhancing safety and reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Prevents eye damage by detecting damage to the wavelength converting device and shutting off the laser light source, ensuring the laser beam does not penetrate, thereby safeguarding users from harm.

Implementation Method 1

The wavelength converting device includes phosphors to convert the invisible laser beam into the visible light

Methodology Applied

Scientific EffectWavelength conversion: Photoluminescence

Implementation Method 2

a conductive area of the optical converting layer is configured to measure a change of a current value or a resistance value

Methodology Applied

Scientific EffectElectrical resistance measurement: Electrical Resistance

Data Source

PatentUS11467430B2Light source device with safety mechanism and wavelength converting device thereof

Publication Date: 2022.10.11 TAIWAN COLOR OPTICS

AI summary

A light source device with a safety mechanism includes a wavelength converting device and a laser light source configured to provide a laser beam. The wavelength converting device includes a substrate facing toward the laser light source, an optical converting layer disposed on the substrate, and a safety examination layer disposed on one side of the optical converting layer. After the laser beam passes through the safety examination layer, the laser beam enters the optical converting layer. The safety examination layer includes a first conductive film arranged along a first direction and a second conductive film arranged along a second direction. The first conductive film and the second conductive film intersect each other.