• Korean Journal of Human Ecology
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• v.15 no.2
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• pp.283-292
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• 2006

The purpose of this study is to analyze and compare the color characteristics of preferred summer clothing textiles, such as shirts, blouse, slacks and skirt. 109 male and female college students evaluated the preference to clothing textiles in previous research and top 10 kinds of textiles were chosen for each clothing item. To analyze the color characteristics of preferred textiles, spectral data were measured with spectrophotometer. By the results, color and color tone, value of L, a, b according to clothing item and season were compared. Chromaticity diagram was drawn, too. The results of this study are as following: 1. Color characteristics of shirts textile college student preferred for summer was PB color and p tone. The textile, in general, represented simple color that is close to achromatic color with light and soft shade. 2. The most preferred color of blouse textiles was G color and It, d tone. The color characteristics of blouse textiles represented stronger and more brilliant than those of shirts. 3. For slacks, colors of preferred summer textiles were mostly B, YR color and p, It.g, dk tone. Therefore, preferred textiles for slacks represented simple bluish or brownish color that is close to achromatic color with light or dark shade. 4. The most preferred color of skirt textiles were Y, R color and It tone. Skirt textiles had various colors compared to slacks. 5. College students generally prefer simple cold color that is close to achromatic color, because shirts and slacks have high frequency of wearing. In color tone, light and soft tone were preferred for shirts, and for slacks, they preferred light or dark tone. Comparatively, blouse and skirt which have low frequency of wearing represented various colors which contain more brilliant and stronger toned warm colors. 6. By the result of analyzing L, a, b value, shirts and blouse textiles showed higher L value than those of slacks and skirt. The textiles preferred by college students were generally close to achromatic color, because values of a, b were very low. This was confirmed with the result of chromaticity diagram. 7. In pattern of preferred textiles, solid textile were preferred mostly for shirt, blouse, skirt and slacks, and stripe pattern was preferred secondly.

• The Journal of Korean Academy of Prosthodontics
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• v.37 no.3
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• pp.343-357
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• 1999

The color change of maxillofacial silicone has been attributed to certain environmental factors such as exposure to the UV component of natural sunlight, wetting and drying of the elastomer and surface abrasion resulting from the application and removal of cosmetics. The purpose of this study was to evaluate the color change of maxillofacial silicone (Silastic MDX4-4210) according to type of pigment (cadmium yellow, titanium white, cosmetic red), and UV absorber application method after 200, 400, and 600 hours of 350nm UV light irradiation. The results were as follows. 1. According to type of pigments, after 200 hours cosmetic red showed significantly larger color change than cadmium yellow and titanium white, and after 400 and 600 hours color change significantly decreased in the order of cosmetic red, cadmium yellow, and titanium white (p<0.05). 2. In the cadmium yellow group, after 200 hours, the non-treatment group showed significantly larger color change, but after 400 and 600 hours, color change significantly decreased in the order of non-treatment, surface application and mixed group (p<0.05). 3. In the titanium white group, there was no significant color change difference between the three groups after 200 and 400 hours, but after 600 hours, the mixed group showed significantly smalt or color change than the non-treatment and surface application groups (p<0.05). 4. In the cosmetic red group, there was significant decrease in color change in the order of non-treatment, surface application and mixed group (p<0.05). From the results above, the effect of UV light absorber differed according to the type of pigment, but mixing UV light absorber with maxillofacial silicone is thought to give superior resistance against UV light irradiation in the long run.

• Journal of the Korean Home Economics Association
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• v.44 no.10
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• pp.47-55
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• 2006

The purpose of this study was to analyze and compare the color characteristics of preferred clothing textiles of college students. One hundred nine male and female college students were evaluated for their preference to clothing textiles in previous research. To analyze the color characteristics, spectral data were measured. Color, color tone, and values of $L^*,\;a^*,\;b^*$ according to clothing item were compared. In addition, chromaticity diagram was drawn. The results of this study were as following. 1. The color of the shirts textile that college student preferred most in spring/fall was PB(purple blue) color, lt(light) tone. In general, the preferred textiles for shirts represented a simple color that is close to achromatic color with light and soft shade. The color of the blouse textiles that college student preferred most was PB color, d(dull), g(grayish) and W(white) tone. 2. The most frequently shown color of upper garment was PB, followed by Y(yellow) for shirt and R(red) for blouses. College students prefer a simple color which is close to achromatic color, and a light and soft color was preferred for shirts fabric and they preferred various, medium shades, but closer to pure colors for blouses because college students tend to consider that the aesthetic side is important and usually wear blouses less often than shirts. 3. For slacks, the colors of the preferred textiles were B(blue), PB color and lt.g.(light grayish), g, d and bk(black) tone. Therefore, the preferred textiles for slacks represented simple colors such as bluish or close to achromatic color with light or dark shade. For skirt, YR(yellow red), PB color and lt.g, lt, d. tone were preferred. Therefore, soft light or moderately toned various colors that are close to pure color were especially preferred for skirts. 4. The colors of preferred fabrics for slacks and skirts differed. The colors of the preferred fabrics for slacks were mostly cold color, whereas those of skirts were mostly warm color. And college students preferred various, medium shaded and closer to pure colors for skirts because they tend to consider the aesthetic side as being important. 5. The pattern of preferred fabrics was mostly solid, regardless of clothing item, and melange was the second most preferred pattern. 6. Through the analysis of $L^*,\;a^*,\;b^*$ values, shirt and blouse textiles showed higher $L^*$ value than that of slacks and skirt. The preferred textiles of college students were generally close to achromatic color because the values of $a^*$, and $b^*$ were very low, as confirmed by the result of the chromaticity diagram.

• Journal of the Korean Society of Costume
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• v.57 no.6 s.115
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• pp.32-45
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• 2007

Among 96 color combination stimuli, male students evaluated 47 set as harmonized, but female students evaluated 32 set, so proved that male's range of harmony more extensive than that of female. Specially red shirt and yellow red necktie in all tone was evaluated as harmonized coloration by both male and female students. Female evaluated as the best harmonious coloration that red shirt-yellow necktie in dark, blue shirt-yellow necktie in dark, purple shirt-red necktie in light, green shirt-blue necktie in dull, and male evaluated red shirt-yellow red necktie in light, blue shirt-yellow necktie in light, purple shirt-red necktie in light, green shirt-yellow necktie in dark. It is significant difference between female and male on red-green in vivid, and blue-purple in vivid, blue-blue in dull, blue-yellow in dark, and purple-purple in dull. And shirt color and necktie color, necktie color and tone, tone and perceiver' gender influenced on the harmony evaluation by interaction.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.1
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• pp.1-8
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• 2015

To produce the white light, there are a single chip method using the blue light and phosphor coating, a multi chip method by mixing R, G, B light.. Multi chip method is proper for the smart lighting system by controling color and color temperature. And color rendering of single chip LED is good by even spectral distribution. To apply application technic like smart light system, this paper analyzed the properties of single chip LED and RGB multi chip LED, and implemented the 2 part subject evaluation for single chip LED and RGB multi chip LED. The first part is comparison of properties for single chip LED and RGB multi chip and second part is color appearance evaluation of 8 colors in each lighting environment.

• Journal of the Korean Home Economics Association
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• v.43 no.5 s.207
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• pp.107-115
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• 2005

The purpose of this research was to compare the harmony of tone on tone coloration according to transformation of color area-ratio in traditional Korean dress. The respondents were asked to evaluate 36 stimuli of the traditional Korean skirt and jacket with different color tone. The subjects were 83 female undergraduate students. The results are as follows. For red colors, combinations of vivid/dull, vivid/dark, and light/dark made a difference in the harmony of coloration according to the transformation of color area-ratio. For yellow colors, combinations of vivid/dark, light/dull, and light/dark made a difference in the harmony of coloration according to the transformation of color area-ratio. For green colors, combinations of vivid/dull, vivid/dark, light/dull, and light/dark made a difference in the harmony of coloration according to the transformation of color area-ratio.

• Applied Science and Convergence Technology
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• v.25 no.1
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• pp.1-6
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• 2016

Quantum dots (QDs) are considered as excellent color conversion and self-emitting materials for display and lighting applications. In this article, various technologies which can be used to realize white light emission with QDs are discussed. QDs have good color purity with a narrow emission spectrum and tunable optical properties with size control capabilities. For white light emission with a color-conversion approach, QDs are combined with blue-emitting inorganic and organic light-emitting diodes (LED) to generate white emission with high energy conversion efficiency and a high color rendering index for various display and lighting applications. Various device structures for self-emitting white QD light-emitting diodes (QD-LED) are also reviewed. Various stacking and patterning technologies are discussed in relation to QD-LED devices.

• Textile Coloration and Finishing
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• v.16 no.5
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• pp.8-18
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• 2004

In order to study on the color change of silk dyed with natural colorant due to light fading, and find out the effect of combination dyeing, colorant extracts of safflower red, safflower yellow and amur cork tree were used, either singly or in combination. In combination dyeing, safflower yellow or amur cork tree dyeing process was added on the top of the silk fabric was dyed with safflower red. Color change and light fastness were investigated by $L^*,\; a^*,\; b^*$ H, V/C, and Color difference. Brightness of silk fabric dyed with safflower red and safflower yellow increased gradually with increasing the radiation time of UV light, but amur cork tree was decreased and turned to dull. Color difference of dyed with Amur cork tree showed higher than the others. Combination dyeing of safflower red and amur cork tree provided better light fastness than the one of safflower red and safflower yellow.

• KIEAE Journal
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• v.8 no.6
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• pp.21-26
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• 2008

According to the tendency of energy efficiency and environment-friendly chracteristics, demend of High-efficiency lighting using LED(Light Emitting Diode)are being increased actively and applied in various fields. However, In order to adequate application of LED light sources, it is necessary to lighting environment and luminous characteristics of LED light sources. This Study aims to characterize the work-plane lighting environment by LED light sources comparing with fluorescent light sources which are widely used. For the sake of this study, a fluorescent light source and 5 LED light sources were introduced and luminance and correlated color temperature were measured to evaluate luminance contrast. The experimental model is Mock-up which is $4.9m{\times}7.2m$ with a height of 2.9m. The test room was set up partition and desks. Luminance and correlated color temperature were measured work-plane on the desk which was set up local lighting by the Radiant Imaging ProMetric 1400. The optical characteristics data of LED can give a lot of advantages to design LED lighting appliances. Hereafter, the object of research will be conducted to evaluate effects of LED light sources on working performance, survey of visual performance, preference and physiology of subjects.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.62 no.9
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• pp.1290-1296
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• 2013

The light intensity which represents the relative amount of brightness and darkness is very important feature to discern the color hue and its relevant information. With this aim, we devise a new optical system and method to analyze the light intensity. Our suggested system including a phototransistor and white-high-brightness chip light-emitting diode intend estimate the contrast value utilizing Image Research Institute(I.R.I.) Hue & Tone samples which includes 120 color sheets arranged by the color hue and tone. As a result, we confirmed that the brightness of the color checker can be accurately estimated by a high-brightness light-emitting-diode optical system.