Skin Care Device Light Guide Panel Uniform Irradiation
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Solution Overview
Problem
Existing skin care devices face challenges in evenly irradiating light to skin regions due to variations in distance between the device and the skin, leading to inconsistent skin care effects.
Innovation Solution
A skin care device with a light output module that emits light in a surface light-emitting form, utilizing a light guide panel and reflector to diffuse and transmit light, ensuring uniform irradiation across skin regions by adjusting light intensity based on distance and forming an irregular surface for optimal light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If point light sources are used in conventional skin care devices, then the device structure is simple, but the light intensity varies significantly across different skin regions due to distance variations
Solution Approach 1:
The patent introduces a light guide panel as an intermediary component between the point light sources and the skin. This panel transforms the point light sources into a surface light source, enabling uniform light distribution across the skin surface while maintaining a relatively simple device structure. The light guide panel acts as a mediator that converts concentrated light into diffuse light without requiring complex mechanical adjustment mechanisms.
Solution Approach 2:
The patent changes the physical state and distribution parameters of light by using a light guide panel with specific optical properties. The panel transforms the spatial distribution of light from concentrated point sources to a diffuse surface emission pattern. This parameter change in light distribution achieves uniform illumination across different skin regions while keeping the device structure simple.
2Adaptability or versatility
If the distance between the device and skin varies across different regions, then the device can be worn comfortably on various face shapes, but the skin care effect becomes inconsistent
Solution Approach 1:
The patent creates an equipotential light distribution surface through the light guide panel. By transforming point light sources into a surface light source, the system ensures that all regions of the skin receive approximately equal light intensity regardless of distance variations. This equipotential approach to light distribution maintains consistent skin care effects while accommodating various face shapes and wearing distances.
Solution Approach 2:
The light guide panel serves as an intermediary that decouples the relationship between device-skin distance and light intensity. It absorbs the variations in distance caused by different face shapes and maintains uniform light output, thereby ensuring both adaptability to various users and consistency of skin care effects.
3Reliability
If higher light intensity is used to ensure effective skin care, then the skin care effect is enhanced, but side effects from excessive light exposure increase
Solution Approach 1:
The patent changes the spatial distribution parameter of light intensity by using a surface light source configuration. This allows the system to provide sufficient total light energy for effective skin care while distributing it uniformly across the treatment area. The parameter change from concentrated to diffuse light distribution prevents localized over-exposure and reduces side effects while maintaining overall skin care efficacy.
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 achieves uniform light intensity across skin regions, minimizing deviations and providing enhanced skin care efficacy with a lower reference light intensity compared to conventional point light source devices, maximizing efficiency and preventing side effects from excessive light exposure.
Implementation Method 1
a plate-shaped light guide panel having the predetermined area... The light guide panel may diffuse and transmit the light emitted from the plurality of light sources and the light reflected from the reflector to the inner case
Implementation Method 2
a reflector disposed between the light guide panel and the outer case... the light irradiated from the plurality of light sources may be reflected toward the light guide panel
Data Source
AI summary
A skin care device according to an embodiment of the present disclosure includes an outer case having a first opening, an inner case configured to be fastened to the outer case and having a second opening corresponding to the first opening, and a light output module configured to be accommodated between the outer case and the inner case, in which the light output module includes a module body configured to form a predetermined area based on a shape of the outer case or the inner case, a module cover formed along a part of an outer part of the module body, and, between the module body and the module cover, a plurality of light sources disposed in an array form along the outer part of the module body, and in which each of the plurality of light sources is disposed to face the module body.