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표제지 1

목차 4

ABSTRACT 12

제 1장 서론 14

1.1. 연구 배경 14

1.2. 연구 동향 19

1.2.1. 피부미용기기의 정의 19

1.2.2. 피부미용기기의 종류 및 효과 20

1.2.3. LED 및 미세전류 피부미용기기가 피부에 미치는 영향에 대한 선행연구 24

1.3. 연구 목적과 내용 30

제 2장 이론적 배경 32

2.1. LED의 작용기전 32

2.2. 미세전류(Microcurrent)의 작용기전 36

제 3장 연구 방법 39

3.1. 연구 대상 및 기간 39

3.1.1. 연구 단계 별 피험자 선정방법 및 수행기간 39

3.1.2. 피험자 선정 및 제외기준 40

3.2. 연구 단계 별 실험방법 42

3.2.1. 연령별 기본 피부 상태 측정 및 특성별 데이터 분석 (1 단계) 42

3.2.2. 개인용 피부미용기기를 이용한 LED 광 조사와 미세전류 자극의 단기 적용이 얼굴 피부에 미치는 영향 평가 (2 단계) 43

3.2.3. 개인용 피부미용기기를 이용한 LED 광 조사와 미세전류 자극의 장기 적용이 얼굴 피부에 미치는 영향 평가 (3 단계) 44

3.2.4. 각 단계 별 피부 측정 항목 및 위치 45

3.3. 연구도구 46

3.3.1. LED/미세전류 피부미용기기 46

3.3.2. 피부측정도구 47

제 4장 연구 결과 및 고찰 48

4.1. 연령별 기본 피부 상태 측정 및 특성별 데이터 수집 및 분석 48

4.2. 개인용 피부미용기기를 이용한 LED 광 조사와 미세전류의 단기 적용에 따른 특성 평가 61

4.2.1. 피험자별, 측정 항목별 기본 피부 데이터 결과 61

4.2.2. 피부 측정 항목별 미세전류, LED 및 미세전류와 LED 복합 사용시의 피부 상태변화 64

4.3. 개인용 피부미용기기를 이용한 LED 광 조사와 미세전류의 장기 적용이 안면 피부에 미치는 효과 83

4.3.1. 수분 83

4.3.2. 탄력 87

4.3.3. 유분 89

4.3.4. 모공 90

4.3.5. 색소침착 93

4.3.6. 피지 96

4.3.7. 주름 98

4.3.8. 민감도 101

제 5장 결론 103

참고 문헌 106

연구 실적 122

표목차 7

Table 2-1. Effects of each LED light source 35

Table 3-1. Research Design of 1ˢᵗ Phase Experiment 42

Table 3-2. Research Design of 2ⁿᵈ Phase Experiment 43

Table 3-3. Research Design of 3ʳᵈ Phase Experiment 44

Table 3-4. Measurement Content and Location 45

Table 4-1. Basic skin data measurements for each... 48

Table 4-2. Average of basic skin data measurements for each... 62

그림목차 8

Fig. 1-1. Shisheido 'Optoon' (top), Lululab 'Lumini Home'... 18

Fig. 2-1. The mechanism of low level laser or light therapy.... 34

Fig. 2-2. Resulted electrical under-skin current and subsequent... 38

Fig. 3-1. LED Mask 46

Fig. 3-2. Microcurrent stimulating sheet mask 46

Fig. 3-3. Skin measuring device 47

Fig. 4-1. Recognition of skin type by participants 54

Fig. 4-2. Willingness to improve skin condition 56

Fig. 4-3. Interest in skin care by participants 56

Fig. 4-4. Whether skin care is performed for each... 57

Fig. 4-5. Distribution chart by skin type 63

Fig. 4-6. Correlation between skin moisture and elasticity 63

Fig. 4-7. Moisture change according to use of LED 65

Fig. 4-8. Moisture change according to use of microcurrent 65

Fig. 4-9. Moisture changes due to use of microcurrent and LED 66

Fig. 4-10. Elasticity changes due to use of LED 67

Fig. 4-11. Elasticity changes due to use of microcurrent 67

Fig. 4-12. Elasticity changes due to use of microcurrent and LED 68

Fig. 4-13. Oil-U Zone change according to use of LED 69

Fig. 4-14. Oil-U Zone change according to use of microcurrent 69

Fig. 4-15. Oil-U Zone change according to use of microcurrent and LED 70

Fig. 4-16. Oil-T Zone change according to use of LED 71

Fig. 4-17. Oil-T Zone change according to use of microcurrent 71

Fig. 4-18. Oil-T Zone changes according to use of microcurrent and... 72

Fig. 4-19. Pore changes according to use of LED 73

Fig. 4-20. Pore changes according to use of microcurrent 73

Fig. 4-21. Pore changes according to use of microcurrent and LED 74

Fig. 4-22. Pigmentation changes according to use of LED 75

Fig. 4-23. Pigmentation changes according to use of microcurrent 75

Fig. 4-24. Pigmentation changes according to use of microcurrent and... 76

Fig. 4-25. Sebum changes according to use of LED 77

Fig. 4-26. Sebum changes according to use of microcurrent 77

Fig. 4-27. Sebum changes according to use of microcurrent and LED 78

Fig. 4-28. Wrinkle changes according to use of LED 79

Fig. 4-29. Wrinkle changes according to use of microcurrent 79

Fig. 4-30. Wrinkle changes according to use of microcurrent and LED 80

Fig. 4-31. Sensitivity changes according to use of LED 81

Fig. 4-32. Sensitivity changes according to use of microcurrent 81

Fig. 4-33. Sensitivity changes according to use of microcurrent and LED 82

Fig. 4-34. Changes in moisture content according to use... 85

Fig. 4-35. Changes in moisture content according to use... 85

Fig. 4-36. Changes in moisture content according to use... 86

Fig. 4-37. Changes in elasticity according to use of LED 87

Fig. 4-38. Changes in elasticity according to use of... 88

Fig. 4-39. Changes in elasticity according to use of LED... 88

Fig. 4-40. Change in oil content of U-zone and T-zone according to... 89

Fig. 4-41. Change in oil content of U-zone and T-zone according... 89

Fig. 4-42. Change in oil content of U-zone and T-zone according... 90

Fig. 4-43. Changes in pore size according to use of LED 91

Fig. 4-44. Changes in pore size according to use of... 92

Fig. 4-45. Changes in pore size according to use of LED... 92

Fig. 4-46. Changes in pigmentation according to use of... 94

Fig. 4-47. Changes in pigmentation according to use of... 94

Fig. 4-48. Changes in pigmentation according to use of... 95

Fig. 4-49. Changes in sebum amount according to use of... 96

Fig. 4-50. Changes in sebum amount according to use of... 97

Fig. 4-51. Changes in sebum amount according to use of... 97

Fig. 4-52. Changes in wrinkle amount according to use of... 99

Fig. 4-53. Changes in wrinkle amount according to use of... 99

Fig. 4-54. Changes in wrinkle amount according to use of... 100

Fig. 4-55. Changes in sensitivity amount according to use... 101

Fig. 4-56. Changes in sensitivity amount according to use... 102

Fig. 4-57. Changes in sensitivity amount according to use... 102

초록보기

 Recently, the home beauty device market has seen steady growth. As market competition intensifies, new products incorporating advanced technologies are being introduced to meet diverse consumer needs. However, individual skin characteristics and responses to specific stimuli vary widely from person to person. Additionally, reactivity and consequences to specific stimuli are very diverse. Thus, it is necessary to use home beauty devices suited to each person' s unique skin characteristics. Despite this, not all users have specialized knowledge of these devices, leading to increased side effects. This study confirms the clinical and possibly adverse effects of commercial home beauty devices on human skin. It can empower consumers with the knowledge to make informed choices. LEDs and microcurrent devices, commonly used for facial skin treatments, were selected for this study. It was conducted in three stages, and the contents and results of each stage are discussed. In the first stage, the study meticulously identified skin conditions and characteristics by age. This was achieved through a comprehensive database compiled by measuring the skin condition, daily eating habits, and current skincare status of 30 participants. In the second stage, the effects of applying LEDs and microcurrents at one time to human facial skin were analyzed. Ten participants from the first stage were randomly selected for this analysis. When skin characteristics were evaluated following LED light irradiation and microcurrent stimulation using a home beauty device, the changes in skin moisture and elasticity were similar, indicating a positive correlation between the two. Microcurrent application significantly increased skin moisture and elasticity. LED use alone showed a reduction in wrinkles and pigmentation. However, it was different for each subject. Sebum levels increased with individual use of microcurrents. However, when combining microcurrents and LEDs and individual use of LEDS, the sebum levels showed a decreasing trend. The use of these devices did not change oil and sensitivity levels, In the final stage, changes in the skin were analyzed after 8 weeks of LEDs and microcurrent application. This stage included 15 people randomly selected among the participants in the first stage. Results indicated that microcurrent application increased skin moisture and elasticity. Pigmentation levels were generally decreasing, especially with combined use. Sebum levels were increased when the LEDs were used individually. Wrinkle levels were generally decreasing, especially with LEDs use. Sensitivity levels were generally decreased. This study provides primary data for developing customized beauty care products and designing clinical research protocols in the future. However, a limitation of this study is the small sample size. Future studies will include a large number of participants to validate these findings further.

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