Hand-held Light Therapy Device Using LED Arrays for Portable Ocular Treatment

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Solution Overview

Problem

Existing light therapy devices for treating circadian rhythm disorders and seasonal affective disorder are often large, cumbersome, and cause eyestrain due to high intensity light sources that flood the user's field of vision, while portable LED devices are harsh and inefficient in power consumption.

Innovation Solution

A hand-held light therapy device using cold cathode fluorescent lamps (CCFL) or LEDs, powered by a rechargeable battery, with a parabolic reflector and dimming/ramping capabilities, providing a full spectrum of light and minimizing ultraviolet wavelengths, along with a processor for jet-lag calculations and data input for personalized therapy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If high intensity light sources are used to treat circadian rhythm disorders, then therapeutic effectiveness is improved, but the device size and weight increase

Engineering Contradiction:
Improvetherapeutic effectivenessVSAvoiddevice weight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The device divides the light source into multiple separate LED elements arranged in an array, allowing each individual LED to operate at lower intensity while collectively providing the required therapeutic light dose. This segmentation enables portability while maintaining therapeutic effectiveness.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Multiple low-intensity LED light sources are combined in an array configuration to collectively deliver the required high-intensity therapeutic light exposure. The combined output of multiple LEDs achieves the necessary illuminance without requiring a single large, heavy light source.

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If high intensity light sources are used to treat circadian rhythm disorders, then therapeutic effectiveness is improved, but the device becomes cumbersome

Engineering Contradiction:
Improvetherapeutic effectivenessVSAvoiddevice portability
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The light source is segmented into multiple small LED elements that can be arranged in a compact array on the device housing. This segmentation allows the device to maintain a small, portable form factor while collectively delivering adequate therapeutic light exposure through multiple elements.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent replaces traditional high-intensity incandescent or fluorescent lighting systems with solid-state LED technology, which provides the same therapeutic effect with significantly reduced size, weight, and power consumption, enabling a portable hand-held design.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Weight of moving object

If smaller less intense lamps are used to make devices portable, then device portability is improved, but light intensity decreases causing eyestrain

Engineering Contradiction:
Improvedevice weightVSAvoidlight intensity
Core Design Contradiction:
Weight of moving objectVSIllumination intensity

Solution Approach 1:

Multiple small LED light sources are combined in an array configuration where their individual light outputs aggregate to provide sufficient total illuminance for effective therapy. The combined luminous flux from multiple LEDs compensates for the low intensity of individual elements.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The device transitions from a single-point light source to a distributed array of light sources across the device surface. This spatial distribution increases the effective treatment area and total light output without increasing individual LED intensity or device weight.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

4Device complexity

If LED light sources are used to reduce device size, then device portability is improved, but power consumption increases requiring large batteries

Engineering Contradiction:
Improvedevice portabilityVSAvoidpower consumption
Core Design Contradiction:
Device complexityVSUse of energy by moving object

Solution Approach 1:

The device uses multiple LEDs at reduced individual power levels rather than a single high-power light source. By operating multiple LEDs at lower currents and voltages, the total power consumption is distributed and reduced compared to traditional high-intensity lighting, enabling battery operation.

Inventive Principle:
Principle #16Partial or excessive action

Solution Approach 2:

The patent replaces traditional high-power incandescent or fluorescent lamps with energy-efficient LED technology, which converts electrical energy to light with much higher efficiency. This substitution dramatically reduces power consumption while maintaining adequate light output for therapy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

5Device complexity

If prior art LED devices are used, then device portability is limited, but they consume excessive power requiring external power outlets

Engineering Contradiction:
Improvedevice portabilityVSAvoidpower consumption
Core Design Contradiction:
Device complexityVSUse of energy by moving object

Solution Approach 1:

The device employs multiple low-power LED elements operating at reduced intensity levels, with the total power consumption kept below the threshold requiring external power. By using many small LEDs instead of fewer high-power LEDs, the device achieves adequate total light output while remaining within battery power constraints.

Inventive Principle:
Principle #16Partial or excessive action

Solution Approach 2:

The patent changes the operational parameters of the LED array by controlling current, voltage, and duty cycle to optimize power consumption. The system adjusts LED activation patterns and intensity levels to deliver therapeutic benefit while maintaining power consumption within portable battery limits.

Inventive Principle:
Principle #35Parameter changes

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 device is portable, reduces eyestrain, and effectively treats circadian rhythm disorders, seasonal affective disorder, and other light-related issues by delivering high-intensity, full-spectrum light while being compact and battery-powered, with features like dusk simulation and natural waking assistance.

Implementation Method 1

A hand-held light therapy device using cold cathode fluorescent lamps (CCFL) or LEDs

Methodology Applied
Scientific EffectFluorescence: Fluorescence

Implementation Method 2

A hand-held light therapy device using cold cathode fluorescent lamps (CCFL) or LEDs

Methodology Applied
Scientific EffectLight Emitting Diode: Light Emitting Diode

Implementation Method 3

with a parabolic reflector

Methodology Applied
Scientific EffectReflection: Reflection

Data Source

PatentUS10252079B2Hand-held light therapy apparatus
Publication Date: 2019.04.09 PHILIPS ELECTRONICS NORTH AMERICA CORP
  • US10252079B2 patent drawing
  • US10252079B2 patent drawing
  • US10252079B2 patent drawing

AI summary

A light therapy apparatus is provided for delivering ocular light to a subject to treat disorders that are responsive to ocular light therapy, including a power supply and a hand-held light output device. The light output device includes a plurality of light sources powered by the power supply. A method of light therapy is provided, wherein ocular light is administered to a subject to treat disorders that are responsive to ocular light therapy. The method includes delivering the light to the eyes of a subject by a hand-held light source operated by a power supply.