• Title/Summary/Keyword: 빛과 색

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Rotating Plasma Discharge of Electrodeless Sulfur Lamp Using Circularly Polarized Microwaves (초고주 원편파를 애용한 회전 플라즈마 무전극 황전등 방전)

  • Ko, Jung-Tae;Won, Dong-Ho;Kim, Jin-Joong;Kim, Jeong-Won
    • Proceedings of the KIEE Conference
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    • 2003.07c
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    • pp.1623-1625
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    • 2003
  • 마이크로과 방전 무전극 황전등은 마그네트온에서 발생된 마이크로파로 2-원자 황을 여기하여 방출되는 빛을 조명에 사용하는 차세대 조명기구이다. 1990년대 초반에 미국의 Fusion Lighting Inc에 의해 최초로 소개된 무전극 황전등은 방전구 회전에 의한 방전을 하였다. 기존의 방전기술은 선형편파를 이용, 필드가 중앙에 모이므로 램프를 회전시켜 방전을 유지하였다. 그에 따라 시스템 구성이 복잡해지고 램프회전 속도에 따라 방전에 영향을 주었다. 본 논문에서는 원편파를 이용하여 램프 회전에 따른 문제점을 해결하고, 원편파에 의해 발생된 회전 플라즈마 방전현상을 실험적으로 보인다. 또한 원편파 방전에 의판 분광분포 및 휘도 분석등 방전 현상을 관찰했다. 아울러 연색성이 80이상, 색온도 4900k ${\sim}$ 6827k 범위를 보였다.

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Dimming control method for LED stage lighting system (LED 무대조명의 조도제어기법)

  • Lee, Kyu-Min;Choe, Wang-Seop;Park, Chong-Yun
    • Proceedings of the KIPE Conference
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    • 2010.11a
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    • pp.300-301
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    • 2010
  • 최근 반도체 산업의 비약적 발전으로 고출력 LED 광원 시스템 개발이 확대되고 있다. 그 중 무대조명 분야는 색 연출의 필요성으로 넓은 조도제어(Dimming) 범위가 필수적이다. 본 논문에서는 방송장비의 높은 센싱 속도로 인하여 화면에 생기는 빛의 떨림 현상 제거와 0~100%의 넓은 조도제어 범위를 구현하기 위해 Analog 조도제어와 PWM 조도제어를 결합한 조도제어 방법을 제안하였으며, 이를 위한 회로를 설계하고, 이를 실험적으로 검증하였다.

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A Study of the Architectural Characteristics Depicted on Andre Courrs Fashion Design (앙드레 꾸레쥬의 패션 디자인에 나타난 건축양식 특성연구)

  • Kyoung-Hee Cho
    • Journal of the Korean Society of Costume
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    • v.23
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    • pp.25-43
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    • 1994
  • 앙드레 꾸레쥬는 자신의 디자인에 건축적 조형미를 표현한 대표적인 디자이너이다. 그의 디자인들은 라인 뿐 아니라 색채, 소재, 액세서리에 이르기까지 건물을 짓듯이 설계, 구성되어 있다. 최근 복식미의 건축적 조형성이 강조되고 있는 것을 감안할 때, 60년대 이미 선구자적인 역할을 하면서 자신의 건축가적인 기호를 유감없이 발휘해온 꾸레쥬를 연구한다는 것은 21세기를 향한 패션의 발전 측면에서 조금이라도 의미가 있지 않을까 생각한다. 본 연구에서는 앙드레 꾸fp쥬가 가장 활발히 활동했던 1974년에서 1970년까지 그의 디자인들을 집중 연구하였는데, 그의 패션디자인에 건축양식의 특징들이 어떻게 나타났는지에 연구의 초점을 맞추었다. 본 연구의 대상으로 사용된 실제의 옷 샘플들은 뉴욕 메트로폴리탄 예술박물관내의 Costume Institute Storage 에 있는 의복과 액세서리들을 직접, 관찰 , 분석한것이고 그 박의 사진들은 패션과 건축에 관한 서적과 잡지, 박물관내의 Slide Library , 그리고 Costume Institute Library Collection에서 발췌 , 비교 연구한 것이다. 일찍이 엔지니어링과 건축을 공부했던 앙드레 꾸레쥬는 50년대의 패션 디자이너의 거장 발렌시아가 밑에서 10년 넘게 일하다가 독립하였는데 그의 디자인 세계는 줄곧 여성들이 입고 편히 활동 할 수 있는 기능성을 강조하면서 단순하고 편안한 의복 구성에 중점을 두었다. 그리고 그는 이러한 자신의 패션 철학과 의복제작 과정들은 현대건물이 갖는 단순성, 기능성의 특징과 일치한다고 믿었다. A. 라인(Line) 앙드레 꾸레쥬는 패션 디자인에서의 비레는 건축에서구조를 쌓아가는 것과 같은 것이라고 생각하고 옷에서의 기본 구성을 기하학적인 라인에 두었다. 그래서 그의 옷들은 A-라인, 사각형, 사다리꼴,,, 등의 분명한 실루엣을 이루고 있는데 이러한 기본라인을 뒷받침이라도 하듯 소매가 아주 짧거나 없는 것이 특징이다. 황금분할이 아닌 1 : 1 구성은 그가 독특하게 사용한 비례방법의 하나인데 그것은 자켓과 스커트의 길이비례, 요크와 몸판간의 면적비례 등에서 잘 나타나고 있다. 그리고 그는 , 의복구성의 비례를 강조하기 위해 사용한 강한 색상의 대비를 현대건물의 인테리어에 빛을 사용하는 것과 같은 이치라고 설명한다. B.색상(Color) 흰색은 그러한 그의 비례강조 의복에 가장 적절한 색으로 사용되었다. 그는 빨강, 오렌지, 녹색, 분홍등 강렬한 원색을 사용하였는데도 불구하고 흰색은 그의 건축양식 발상의 Ideo를 완성시키는 완전한 색이었다. 뜨거운 날씨에 흰색이 가장 기능적인 색인 것처럼 강한 원색 대비를 통해 비례강조를 하면서 동시에 그것을 뒷받침하는 가장 합리적이고 기능적인 색은 흰색이라고 믿었다. C. 소재 (Material) 앙드레 꾸레쥬는 건물을 짓듯이 사람위에 옷을 건축한다고 믿었기 때문에 자연히 둔탁하고 딱딱한 소재가 많이 사용되었다. 비닐, 금속류, 시퀸스처럼 광택나고 투명한 재료 선호는 그 당시 현대 건축에서 선풍적으로 많이 사용되었던 유리, 금속류, 크리스탈 등 비치고 광택나는 건축재료와 일맥상통하는 것이다. 그러한 선국적인 내료 사용결과로 보여진 괴상하고 선정적인 그러면서도 아주 단순한 패션은 미래 지향적인 건축양식 구조의 " Simple", "Plain" 느낌과 정확하게 같은 것이다. 이상과 같이 앙드레 꾸레쥬는 옷을 디자인 했다기 보다는 건축했다. 주목할만한 점은 60년대 말 당시 발표되었던 그의 건축 구조적인 디자인의 특징들이 21세기를 앞둔 90년대에 다시 크게 유행하고있다는 점이다. 꾸레쥬 역시, 최근 자신의 디자인을 통해 건축적 조형미와 미래지향적 이미지를 더욱 강조하고 있는 것을 볼 수있다. 단순하면서 우주공간을 선회하는 듯한 입체적인 라인, 흰색을 비롯한 자연에 가까운 색을 중심으로 하되, 밝은 색조의 하이라이트, 플라스틱, 금속류와 같이 딱딱하고 광택나며 비치는 재료 사용,, 등등이 바로 그것이다. 그리고 이러한 그에 미래 지향적이고 조형적인 디자인들은 앞으로 어떻게 더 모험적인 모습으로 선보일지 우리 모두가 주목할만한 일인 것이다.

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Orange in Film Color: Real and Virtual (영화색채의 주황, 현실과 가상)

  • Kim, Jong-Guk
    • Cartoon and Animation Studies
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    • s.50
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    • pp.215-237
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    • 2018
  • I analyze orange that is consistently used, even though not consciously, in the films whose function and meaning are clear. In detail, there are examples of color in films, psychological phenomena of colors expressed in posters and opening titles, color characteristics of clothes and costumes, and semiotic analysis of color names in film titles. (1) Fact and Truth; civilization and criticism. The film tries to tell the truth than the fact. It represents facts as it is, but it presupposes truth. This is a unique characteristic of media films. The truth of the fact is not important. The film tells the truth believing and wanting to show off. The film, which has inherent characteristics of the gap between fact and truth, represents nature and civilization. It carries nature as it is and criticizes the harm of civilization. Orange is nature and civilization. Realistic films such as Hong Sang Soo and Kim Ki Duk, fall into this category. For example, there are A Taxi Driver(2017) and I Can Speak(2017). (2) Virtual History; fake images and memories. In Hollywood SF genres like The Matrix(1999), orange was dealt with virtual reality. However, in Korean films they are replaced by historical dramas. The representation of history becomes a virtual reality. Films such as The Fortress(2017), Masquerade(2012), and Roaring Currents(2014) deal with virtual history. In these films, orange is a fake image and memory. (3) Light=color; Aura. The color and light of orange is aura. At sunrise and sunset, the orange of the incandescent light is almost similar to that of the artificial light. Orange of tungsten makes the real characters surrealistic and mysterious. For example, there are The City of Madness(2016), The Man from Nowhere(2010), and Coinlocker Girl(2014). (4) Fantasy; communication with other worlds. Orange is a sweet fantasy. In our daily life, we go to a supermarket, share a chat with friends in a coffee shop, and spend time in front of a television. Orange makes our life free and dreams. It is the communication between the former being and the other world. This can be found in the sexual fantasy scenes of all genres. For example, there are Sunny(2011), Welcome To Dongmakgol(2005), and 200 Pounds Beauty(2006).

Photochromic lens for patients with photophobia and estimation of clinical trial efficacy (광시증 환자를 위해 개발된 광변색렌즈와 임상 효과 평가)

  • Ha, Jin-Wook;Yu, Dong-Sik
    • Journal of Korean Ophthalmic Optics Society
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    • v.10 no.1
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    • pp.27-34
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    • 2005
  • Photochromic lens is the color changing lens from colorlessness to colorness when exposed to UV light. It can protect eyes from UV-B light which cause the cataract and can be used as sunglass in the summer since it can cut off 70~80% of sun light. Surface coating technique was used to develop lens which has 70% light transmittance and of which fading time of color change is within 5 min. Various color lenses were developed so that these had various color such as blue, green, brown, violet, yellow and red etc. Lens has an excellent physical properties, 100% adhesion and 4~5H hardness. The chemical and the scratch resistance of this lens were the greatest and the thermal stability was also higher. The clinical trial of developed lens were applied to 65 patients who had photophobia by various reasons at ophthalmology of Soonchunhyang University Hospital. Results showed that glaring was significantly reduced and the visual health were remarkably improved. Especially, anti-glaring effect in the night was great for the patient who had the LASIK operation. Protection of UV-B and blue light also can prevent the patient from cataract and the yellowish crystalline lens at old ages. Through the result of clinical. trial, we know that photochromic lens could be a new technique for both cure and precaution of photophobia.

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A Comparative Study on the Semantic and Functional Appropriateness of the Safety Sign Color Standards in Construction Sites (건설안전표지 색채기준의 의미적·기능적 적절성 판단 및 개선방안 도출을 위한 국가 간 비교법제 연구)

  • Jang, YeEun;Yi, June-Seong
    • Journal of the Korea Institute of Construction Safety
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    • v.1 no.1
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    • pp.22-30
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    • 2018
  • Construction accidents in Korea are continuously increasing. Safety signs with high visibility color can diminish such accidents in dangerous places. In order for safety color to be more effective as a global communication means in construction sites, it needs to be checked out whether safety color standard reflect the characteristics of construction industry such as worker or work environment. This paper compared safety color standards among Korea, the US, the UK, and Australia. First, blue color was included in all, which should be corrected considering aged workers increasing in construction industry. Because with age, the ability to distinguish between blue, purple, and gray colors decreases. Second, Korea, which has only single code designated to safety colors, should find alternatives like tolerance to be applicable to a variety of light environments on construction sites, as the contrast which affect the visibility may decrease in dark conditions.

Visibility Enhancement of Underwater Stereo Images Using Depth Image (깊이 영상을 이용한 수중 스테레오 영상의 가시성 개선)

  • Shin, Hyoung-Chul;Kim, Sang-Hoon;Sohn, Kwang-Hoon
    • Journal of Broadcast Engineering
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    • v.17 no.4
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    • pp.684-694
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    • 2012
  • In the underwater environment, light is absorbed and scattered by water and floating particles, which makes the underwater images suffer from color degradation and limited visibility. Physically, the amount of the scattered light transmitted to the image is proportional to the distance between the camera and the object. In this paper, the proposed visibility enhancement. method utilizes depth images to estimate the light transmission and the degradation factor by the scattered light. To recover the scatter-free images without unnatural artifacts, the proposed method normalizes the degradation factor based on the value of each pixel of the image. Finally, the scatter-free images are obtained by removing the scattered components on the image according to the estimated transmission. The proposed method also considers the color discrepancies of underwater stereo images so that the stereo images have the same color appearance after the visibility enhancement. The experimental results show that the proposed method improves the color contrast more than 5% to 14% depending on the experimental images.

Analysis of Browning Factors During Fermentation of Kochujang (고추장 발효 중 갈변 요인에 대한 분석)

  • Kim, Moon-Sook;Ahn, Yong-Seon;Shin, Dong-Hwa
    • Korean Journal of Food Science and Technology
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    • v.32 no.5
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    • pp.1149-1157
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    • 2000
  • To confirm the factors concerning color changes of traditional kochujang, heating, U.V. and $N_2$ gas substitution treatment were conducted on duk(rice cake) kochujang and shikhae(malt digested syrup) kochujang. The value of L, a and b value by Hunter of each kochujang were gradually decreased during fermentation and ${\delta}E$ increased. The ${\delta}E$ value of duk kochujang treated by U.V. was higher than those of the other treatments and non heated shikhae kochujang showed higher ${\delta}E$ value. The main cause of color change by factor analysis on various factors of duk kochujang and shikhae kochujang were light, and light and heat respectively. The acetone and water extracted pigments had maximum absorbance at 450-470 nm and 200-205 nm respectively.

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A Method of Reproducing the CCT of Natural Light using the Minimum Spectral Power Distribution for each Light Source of LED Lighting (LED 조명의 광원별 최소 분광분포를 사용하여 자연광 색온도를 재현하는 방법)

  • Yang-Soo Kim;Seung-Taek Oh;Jae-Hyun Lim
    • Journal of Internet Computing and Services
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    • v.24 no.2
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    • pp.19-26
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    • 2023
  • Humans have adapted and evolved to natural light. However, as humans stay in indoor longer in modern times, the problem of biorhythm disturbance has been induced. To solve this problem, research is being conducted on lighting that reproduces the correlated color temperature(CCT) of natural light that varies from sunrise to sunset. In order to reproduce the CCT of natural light, multiple LED light sources with different CCTs are used to produce lighting, and then a control index DB is constructed by measuring and collecting the light characteristics of the combination of input currents for each light source in hundreds to thousands of steps, and then using it to control the lighting through the light characteristic matching method. The problem with this control method is that the more detailed the steps of the combination of input currents, the more time and economic costs are incurred. In this paper, an LED lighting control method that applies interpolation and combination calculation based on the minimum spectral power distribution information for each light source is proposed to reproduce the CCT of natural light. First, five minimum SPD information for each channel was measured and collected for the LED lighting, which consisted of light source channels with different CCTs and implemented input current control function of a 256-steps for each channel. Interpolation calculation was performed to generate SPD of 256 steps for each channel for the minimum SPD information, and SPD for all control combinations of LED lighting was generated through combination calculation of SPD for each channel. Illuminance and CCT were calculated through the generated SPD, a control index DB was constructed, and the CCT of natural light was reproduced through a matching technique. In the performance evaluation, the CCT for natural light was provided within the range of an average error rate of 0.18% while meeting the recommended indoor illumination standard.

The Tunnel Lane Positioning System of a Autonomous Vehicle in the LED Lighting (LED 조명을 이용한 자율주행차용 터널 차로측위 시스템)

  • Jeong, Jae hoon;Lee, Dong heon;Byun, Gi-sig;Cho, Hyung rae;Cho, Yoon ho
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.16 no.1
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    • pp.186-195
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    • 2017
  • Recently, autonomous vehicles have been studied actively. There are various technologies such as ITS, Connected Car, V2X and ADAS in order to realize such autonomous driving. Among these technologies, it is particularly important to recognize where the vehicle is on the road in order to change the lane and drive to the destination. Generally, it is done through GPS and camera image processing. However, there are limitations on the reliability of the positioning due to shaded areas such as tunnels in the case of GPS, and there are limitations in recognition and positioning according to the state of the road lane and the surrounding environment when performing the camera image processing. In this paper, we propose that LED lights should be installed for autonomous vehicles in tunnels which are shaded area of the GPS. In this paper, we show that it is possible to measure the position of the current lane of the autonomous vehicle by analyzing the color temperature after constructing the tunnel LED lighting simulation environment which illuminates light of different color temperature by lane. Based on the above, this paper proposes a lane positioning technique using tunnel LED lights.