• Title/Summary/Keyword: Light and Color

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RGB White Organic Light Emitting Diode with a Color Control Layer

  • Lee, Jeong-Ik;Chu, Hye-Yong;Yang, Yong-Suk;Lee, Mi-Do;Chung, Sung-Mook;KoPark, Sang-Hee;Hwang, Chi-Sun
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.1587-1590
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    • 2006
  • Through the engineering of recombination region and energy transfer in organic light emitting device, blue and red light emitting device with good color stability has been successfully obtained. A Color control layer (CCL), which emits green light through the energy transfer from the emission layers, has been introduced into the blue and red light emitting device for RGB white OLED. The RGB white OLED showed the current efficiency of 13 cd/A and the CIE coordinates of (0.33, 0.38) at $1000\;cd/m^2$. The device exhibited very stable spectrum with respect to operating current density and the CIE coordinates varied from (0.34, 0.38) to (0.31, 0.37) for $100-22000\;cd/m^2$.

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The Characteristics and Change of Colors on Fashion Collections in 1990s

  • Kim, Honey;Kim, Young-In
    • International Journal of Costume and Fashion
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    • v.7 no.2
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    • pp.18-31
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    • 2007
  • The purpose of this study is to examine color characteristics and color changes of the fashion collections through 1990s, and to provide the efficient color information for color planning upon fashion themes. For this research, a total of 30,084 colors were collected from Paris, Milan, London, New York Collections in 1990s. Those colors were first measured by the Pantone Textile Color Specifier and COS Color System and spectrophotometer(color eye 580). These measured color values $L^{\ast}a^{\ast}b^{\ast}$of CIE were converted into H V/C of Munsell System, and 12 tones of PCCS with 5 achromatic colors. The characteristics of collected colors were analyzed in general and by place, season and year. The results of the study are as follows : First, the hues of purple blue, yellow red, red, yellow and the tones of grayish, pale, white, black, dark grayish, dull, light grayish appeared mostly. Yellow was shown quite frequently in spring/summer while purple, purple blue, red and yellow red in fall/winter. White, pale, light, light grayish and light gray were shown more frequently in spring/summer while Black, dark grayish, grayish, dark gray and dark in fall/winter. Second, the characteristics of colors by 4 representative places were similar to the general characteristics of colors in 1990's. Third, There were distributed widely Red, Yellow Red, Yellow in the early 1990s, Green Yellow, Green, Blue Green in the mid of 1990s, and Purple Blue, Purple in the late of 1990s. The distribution range of chromatic colors showed wide in both of the early of 1990s and the mid of 1990s for a while, and achromatic colors of grayish, gray and black appeared mostly in the late of 1900s.

Color-Matching Liquid Crystal Display using a Lenticular Lens Array and RGB Light Sources

  • Jeon, Hwa Joon;Park, Gyeungju;Gwag, Jin Seog;Lee, Jong Hoon;Kwon, Jin Hyuk
    • Journal of the Optical Society of Korea
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    • v.18 no.4
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    • pp.345-349
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    • 2014
  • A direct-lit color-matching liquid crystal display using a lenticular lens array with grouped lens elements that image linear RGB light sources on the RGB subpixels of a color filter to enhance transmittance is designed, simulated, and fabricated. The RGB LED linear light sources were fabricated using small RGB LEDs in a linear array arrangement, and the lenticular lens array consisted of eight units of the same structure with a gap of 2.19 mm. The optical transmittance of the liquid crystal panel was improved by as much as 240% due to the color matching.

Corresponding Color Reproduction on CRT between Illuminated Environment viewing Conditions (관찰환경에 따른 소프트카피의 대응적 색재현)

  • 곽한봉;안성아;서봉우;이영호;안석출
    • Proceedings of the Korea Institute of Convergence Signal Processing
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    • 2001.06a
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    • pp.241-244
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    • 2001
  • A various color device became generalization. Therefore, request about expression of correct color is increased. Device independent color reproduction system acquires and reproduce color of object regardless characteristic of Input/Output device. Human visual system is partially adapted to the CRT monitor's white point and the ambient light. The visual experiments were performed on the effect of the ambient lighting under mixed chromatic adaptation. In this paper, It was found that human visual system is 40% to 60% adapted to CRT monitor's white point light and the rest to ambient light.

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Color Lens Design by Changing the Combination of Coating Materials (증착 물질 두께 조절을 이용한 색상 렌즈 설계)

  • 이덕희;류지욱;한두희
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.3 no.2
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    • pp.84-88
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    • 2002
  • We designed 5 layer coating in using $SiO_2$and $ZrO_2$. We calculated reflectance with changing the thickness of 5th layer and visualized color of reflected light in using reflectance of RGB. by the result, when thickness is increase from 5 nm to 80 nm, red color of reflected light is decreased and increase from 80 nm to 150 nm, blue color of reflected light is increased. we maked use of Photoshop 5.0 to analyze colors.

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Optimization of the Emission Spectrum of Red Color in Quantum Dot-Organic Light Emitting Diodes

  • Jeong, Byoung-Seong
    • Applied Chemistry for Engineering
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    • v.32 no.2
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    • pp.214-218
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    • 2021
  • We investigated the optimal stacked structure from the perspective of process architecture (PA) through emission spectrum analysis according to the wavelength of quantum dot (QD)-organic light-emitting diodes (OLED). We confirmed that the blue-light leakage through the QD can be minimized by increasing the QD filling density above a critical value in the red QD (R-QD) layer. In addition, when the thickness of red-color filter (R-CF) at the upper part of the R-QD increased to more than 3 ㎛, the leakage of blue light through the R-CF was effectively blocked, and a very sharp emission spectrum in the red wavelength band could be obtained. According to these outstanding results, we expect that the development of QD-OLED displays with very excellent color gamut can be possibly realized.

A Study on Image Evaluation consequent on Lighting Environment in time of reading in Learning Space (학습공간에서의 독서 행위 시 조명환경에 따른 이미지평가 연구)

  • Lee, Jin-Sook;Park, Ji-Young;Seo, Eun-Ji
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.29 no.9
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    • pp.1-9
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    • 2015
  • The aim of this study is to deduce color temperature and illuminance by conducting the preference & affective evaluation consequent on illuminance change of ambient light in case of the lighting method of ambient light mixed with task light in time of reading which is visual work action among the action in learning space. As a result of the prior survey on preferred lighting method in time of the act of reading targeting 20 experts before doing evaluation, the method of lighting mixed with ambient light and task light was found to be the highest. Such a result is analyzed to be attributable to the fact that the less the difference in illuminance of nearby space and work surface because of the mixed method of lighting, the less the glare, which makes a reader feels easy and concentrate on reading. On the basis of descriptive statistics of evaluation results and impact analysis by category, this study recommends the application of combinations of ambient light illuminance ranging from 40lx to 100lx with color temperature of 5500~6000K in case of the method of lighting mixed with general light and task light.

The Image and Color Characteristic of Fashion Tinged with Beige (현대패션에서 나타난 베이지의 색채특성과 배색이미지)

  • Seo, In-Kyung;Kim, Young-In
    • Journal of the Korean Society of Costume
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    • v.62 no.6
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    • pp.19-37
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    • 2012
  • This study was done to define the color range, images and color characteristics of beige in fashion by analyzing the characteristics of beige that appears in contemporary fashion. In reference research, the general characteristics, the color name and range of beige was examined. In investigation research, color characteristics and images of beige that appear in contemporary fashion was defined, and it was discovered that the cases that the use of beige took more than 50% of the entire in the major collection from S/S season in 2007 to F/W season in 2010 as the subject of color analysis. The result of the study could be summarized as follows: First, the color range of beige consisted of the standard color from 2.5YR to 5YR, and color tone was pale and light gray. Second, the analysis of color beige that appear in contemporary fashion didn't show big differences according to year, season, and region. The color tones consisted of light grayish, pale, light, soft focusing colors from 5YR to 10YR. As for the arrangement of colors, it was arranged with black and it was used with the affiliation of YR, R, Y in many cases. Third, beige monochromatic image appeared soft, plain and classic. The arrangement of the image, modern, feminine, luxurious, gentle, intelligent five types were derived. Arrangements with achromatic colors were expressed in contemporary and sophisticated styles and arrangements with chromatic colors appeared to be soft, feminine and luxurious. This study draws the result to apply the fashion image of beige that was insufficient in other various color researches to design various color aspects by defining the image of beige that appears in contemporary fashion. Based on practical analysis for the color beige, it is evident that beige is an important factor and a powerful influence on fashion images.

Automatic Color Transformation of Character Using Color Transformation Matrix in 2D Animation (2D 애니메이션에서 색 변환행렬을 이용한 캐릭터의 자동 색 변환)

  • Jung, Hyun-Sun;Moon, Yong-Ho;Kim, Jae-Ho
    • Journal of Korea Multimedia Society
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    • v.10 no.10
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    • pp.1240-1250
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    • 2007
  • We introduce technique for color transformation of characters between scenes in 2D animation. As colors are perceived differently owing to light source, so character colors like clothes, skin and so on are colored differently owing to atmosphere of each scene. This paper is made an attempt to solve mathematically color assignment of characters which has been worked by hand so far. We can find a matrix for color transformation of characters by appling principle of color stimulus to our algorithm. In scenes of existing 2D animation, basic colors and colors under light source of characters are used for the matrix. And matrixes are obtained for each scenes of 2D animation. If we are known basic colors of some characters, you can derive character colors under other light source environments using the matrix. Therefore, this paper describes automatic color transformation of characters between animation scenes.

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Distinction of Color Similarity for Clothes based on the LBG Algorithm (LBG 알고리즘 기반의 의상 색상 유사성 판별)

  • Ju, Hyung-Don;Hong, Min;Cho, We-Duke;Moon, Nam-Mee;Choi, Yoo-Joo
    • Journal of Internet Computing and Services
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    • v.9 no.5
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    • pp.117-130
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    • 2008
  • This paper proposes a stable and robust method to distinct the color similarity for clothes using the LBG algorithm under various light sources, Since the conventional methods, such as the histogram intersection and the accumulated histogram, are profoundly sensitive to the changing of light environments, the distinction of color similarity for the same cloth can be different due to the complicated light sources. To reduce the effects of the light sources, the properties of hue and saturation which consistently sustain the characteristic of the color under the various changes of light sources are analyzed to define the characteristic of the color distribution. In a two-dimensional space determined by the properties of hue and saturation, the LBG algorithm, a non-parametric clustering approach, is applied to examine the color distribution of images for each clothes. The color similarity of images is defined by the average of Euclidean distance between the mapping clusters which are calculated from the result of clustering of both images. To prove the stability of the proposed method, the results of the color similarity between our method and the traditional histogram analysis based methods are compared using a dozen of cloth examples that obtained under different light environments. Our method successively provides the classification between the same cloth image pair and the different cloth image pair and this classification of color similarity for clothe images obtains the 91.6% of success rate.

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