Overdriven LED Array for Skin Rejuvenation
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Solution Overview
Problem
Existing light therapy devices rely on monochromatic and coherent laser radiation, which limits their bio-stimulative effects, and lack a method to generate thermal heat directly from light emitting diodes for skin treatment.
Innovation Solution
A light therapy device with a circuit board array of different wavelength LEDs that overdrive light emitting diodes to produce both increased light output and thermal heat, conducted directly to the skin, using a current limiting circuit to maintain a skin temperature between 97 and 106 degrees Fahrenheit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If monochromatic and coherent laser radiation is used for light therapy, then the device can provide focused light energy, but the bio-stimulative effects are limited compared to non-monochromatic light
Solution Approach 1:
The device segments the light source into multiple discrete LED components, each emitting a specific wavelength (415nm, 460-465nm, 605nm, 630nm, 660nm, 850-855nm, 940nm). This segmentation allows each wavelength to target different photoreceptors and biological functions independently, resolving the contradiction by providing both focused wavelength-specific effects and broad spectral coverage through combination.
Solution Approach 2:
The device merges multiple LED light sources of different wavelengths into a single integrated array that can be applied to the skin simultaneously. This combining approach consolidates the benefits of monochromatic light (specific wavelength effects) with the versatility of non-monochromatic light (broad spectrum coverage), achieving enhanced bio-stimulative effects while maintaining adaptability across different tissue types and conditions.
2Illumination intensity
If LEDs are overdriven to increase light output, then the light intensity is improved, but thermal heat generation increases
Solution Approach 1:
The device converts the harmful thermal heat generated by overdriving LEDs into a beneficial therapeutic effect. By deliberately operating LEDs at high current densities, the system generates controlled thermal heating (97-106°F) that penetrates the skin to stimulate collagen production, blood flow, and metabolic activity. The current limiting circuit and thermal management system ensure the heat remains within therapeutic ranges, transforming what would normally be a detrimental side effect into a primary therapeutic mechanism.
3Reliability
If a current limiting circuit is used to control LED current, then the LED operation is stabilized, but the device complexity increases
Solution Approach 1:
The device uses parameter changes in the electrical circuit to achieve stable LED operation. By incorporating current limiting circuits that dynamically adjust the current flow based on LED characteristics and thermal conditions, the system maintains reliable operation across varying conditions. This parameter-based control approach provides stability without requiring complex mechanical or electronic control systems, resolving the contradiction between reliability and complexity.
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 provides enhanced bio-stimulative effects by combining multiple wavelengths of non-coherent light and generating thermal heat, promoting collagen and elastin production, and is suitable for various therapeutic applications, including skin rejuvenation and pain relief.
Implementation Method 1
a plurality of different wavelength light emitting diodes configured to provide photodynamic stimulation of a surface and underlying layers of cells of skin tissue
Implementation Method 2
at least one of said plurality of different wavelength light emitting diodes is overdriven to increase light output of said light emitting diodes beyond normal operating intensity and to further produce thermal heat from said light emitting diodes
Implementation Method 3
produce a skin temperate of between 97 and 106 degrees Fahrenheit from direct thermal conduction of said thermal heat from said light emitting diodes
Implementation Method 4
non-monochromatic light across different wavelengths penetrates body tissue and is absorbed, reflected and scattered to excite molecules within cells and tissue to thereby accelerate repair and regeneration
Data Source
AI summary
A light therapy device including multiple light-emitting diodes (LEDs) positioned in a handheld, portable device is disclosed. The device including the LEDs are configured to have direct or nearly direct contact with the skin or tissue of the user without any intermediary materials, and light the surface and underlying layers of tissue for photodynamic stimulation of the user's cells. Housings for the devices may contain an arrangement of 12-600 LEDs on one or more circuit boards in an arrangement to provide even lighting over the skin or tissue surface. A plurality of devices may be connected together for treating larger areas of tissue. A belt may be used for keeping in position a plurality of therapeutic devices.