LED Short-Wavelength Blocking Film for Eye Protection

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Solution Overview

Problem

The intensive use of LED-type displays poses a risk to human eye health due to the emission of short wavelengths, which existing solutions fail to adequately address, particularly in the context of daily usage and existing products on the market.

Innovation Solution

A blocking element for short wavelengths is introduced, comprising a substrate with a pigment that selectively absorbs wavelengths between 380 nm and 500 nm, with adjustable optical density based on user factors such as age, exposure time, and ambient lighting, implemented either as a multilayer coating or via software to reduce harmful emissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If LED-type displays are used to provide bright and energy-efficient lighting, then illumination intensity and energy efficiency are improved, but harmful short wavelength emissions increase causing retinal damage

Engineering Contradiction:

ImprovebrightnessVSAvoidshort wavelength emissions

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

A blocking element is introduced as an intermediary component between the LED display and the user's eye. This element selectively blocks harmful short wavelengths (380-500 nm) while allowing beneficial longer wavelengths to pass through, thus mediating the interaction between LED light and retinal tissue to prevent damage while maintaining visibility

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The blocking element modifies the spectral parameters of LED light by selectively absorbing specific wavelength ranges. By changing the optical properties of the light transmission through the blocking element, harmful high-energy short wavelengths are filtered out while preserving the overall illumination function

Inventive Principle:

Principle #35Parameter changes

2Reliability

If blocking elements are added to LED displays to filter short wavelengths, then eye protection is improved, but device complexity increases

Engineering Contradiction:

Improveeye protectionVSAvoidstructure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The blocking element is implemented as a thin film or coating that can be applied to the display surface. This approach provides effective wavelength filtering without adding significant structural complexity, maintaining the sleek design of LED displays while incorporating protective functionality

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The blocking element serves multiple functions simultaneously: it acts as a protective filter against harmful wavelengths, maintains visual comfort by reducing eye strain, and preserves the aesthetic and functional properties of the LED display. This multi-functionality reduces the need for additional separate components

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If yellow filters are implanted in the eye to block short wavelengths, then retinal protection is improved, but surgical risks and invasiveness increase

Engineering Contradiction:

Improveshort wavelength blockingVSAvoidimplementation

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

Instead of modifying the eye itself through surgical implantation of filters, the invention inverts the approach by placing the filtering mechanism in the external display device. This eliminates the need for invasive eye surgery while achieving the same protective effect through external wavelength filtering

Inventive Principle:

Principle #13The other way round (Inversion)

4Illumination intensity

If transparent intraocular lenses are implanted without yellow pigmentation, then visual clarity is improved, but protection against short wavelengths is lost

Engineering Contradiction:

Improvevisual clarityVSAvoidshort wavelength exposure

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The blocking element in the LED display acts as an intermediary protective layer that compensates for the lack of yellow pigmentation in transparent intraocular lenses. By filtering harmful wavelengths before they reach the eye, it provides the protective function that the clear lens alone cannot deliver while maintaining visual clarity

Inventive Principle:

Principle #24Intermediary (Mediator)

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 solution effectively protects the retina and cornea from harmful short wavelengths, reducing eye strain and improving visual comfort by selectively absorbing and reducing the emission of harmful light, thereby preventing cumulative and irreversible damage.

Implementation Method 1

said pigment has an optical density such that it allows the selective absorption of short wavelengths between 380 nm and 500 nm

Methodology Applied

Scientific EffectSelective absorption: Absorption (EM radiation)

Data Source

PatentUS20240411071A1Blocking element of short wavelengths in led-type light sources

Publication Date: 2024.12.12 UNIV COMPLUTENSE DE MADRID

AI summary

Method, product and blocking element of short wavelengths in LED-type light sources consisting of a substrate with a pigment distributed on its surface and, in that said pigment has an optical density such that it allows the selective absorption of short wavelengths between 380 nm and 500 nm in a range between 1 and 99%.