• Korean Institute of Interior Design Journal
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• no.34
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• pp.124-131
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• 2002

Lighting is the single most important part of the design of a retail store. Good lighting can enhance a product's appearance, accentuate a special display, balance the visual elements of a store, and create the proper mood. In shops the lighting is required to draw the customer's attention to the goods help him to appraise them, and provide an atmosphere conducive to sales. The method will vary according to the types of good displayed, the form of trading, the design of the shop, and the class of customers expected. For the all reason, this study is focused on how the lighting design effects the customer's interest to the goods and intended to prescribe the possibilities of effective lighting design.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1347-1348
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• 2008

The efficacy and its degradation of light emitting diode(LED) are related to its PN junction's temperature(Tj). Currently efficacy in certain temperature and thermo-resistant are defined for the depending. However, the definitions are quite inconvenient for lighting application. The paper focuses on the issue and presents a method to evaluate the thermal characteristics of LED efficay.

• Conservation Science in Museum
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• v.19
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• pp.83-98
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• 2018

Most preceding studies on museum lighting have focused mainly on illuminance, however this study examines diverse lighting characteristics, including illuminance, luminance, color temperature, and color rendering to allow a more objective evaluation of museum lighting. In particular, issues with existing museum lighting were examined through visual measurement to find an appropriate condition complying with museum lighting standards while providing a pleasant lighting experience for visitors. Although the top priority of museum lighting is to safely protect collections on display, lighting that takes into consideration luminance, color temperature and color randition will allow more effective appreciation as well as safe conservation of the exhibits.

• Korean Institute of Interior Design Journal
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• no.16
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• pp.190-201
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• 1998

The purpose of this study is to consider the correlational factors of space sections based on the fact the exhibition space plays an important role as a medium of displaying art works. And an another purpose is to investigate the characteristics of various types of exhibition unite space from which In intend to suggest basic sources of exhibition design. I classified domestic and foreign museum which are chosen as objects of study according to form and shape of a section plan. Then comparing exhibition space's form and scale exhibited genre lighting system layout composition display and its correlation with an already established thesis on museum architecture I will infer the characteristics of each type of a space. From these studies proper display conditions requested at the museum are different from the genre and property of the exhibited objects. And lighting system display angel of view and appreciation type affect the exhibition area. The shape of space classifies types of section which cause space's characteristics.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1350-1352
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• 2008

Research on down conversion phosphor materials is the key for the development of solid state lighting (SSL). Especially finding alternative red phosphor for white LEDs based on blue or NUV LEDs are important research task. Under this view, we have synthesized a series of $Eu^{3+}$ substituted $La_2W_{2-x}Mo_xO_9$ (x = 0 ~ 2, insteps of 0.1) red phosphor and characterized by X-ray diffraction (XRD) and photoluminescence. XRD results reveal a phase transition from triclinic to cubic structure for $x\;{\geq}\;0$. All the compositions show broad charge transfer band due to charge transfer from oxygen to tungsten/molybdenum and red emission due to $Eu^{3+}$ ions. Select compositions show high red emission intensity compared to the commercial red phosphor under NUV/blue ray excitation. Hence, this candidate can be possible red emitting phosphors for white LEDs.

• Journal of the Korean Ceramic Society
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• v.50 no.1
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• pp.75-81
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• 2013

We fabricated translucent opal glass to replace the polycarbonate diffuser in LED lighting systems in order to solve the durability problem. Batch materials of opal glass with a composition of calcium phosphate were created and melted at $1550^{\circ}C$, and the effect of opaqueness was identified by an addition of 1~7% calcium phosphate as an opacifier raw material. As a result, translucent opal glass was obtained by the melting of the mixed batch materials with a composition of more than 5% calcium phosphate glass at $1550^{\circ}C$ for 2 hrs, which had excellent optical properties for the diffuser of a LED lighting system with no dazzling from direct light by a high haze value exceeding 90% and a low parallel transmittance value of about 5%. For the thermal properties, the thermal expansion coefficient was found to be $5.6{\sim}5.9{\times}10^{-6}/^{\circ}C$ and the softening point was $874{\sim}884^{\circ}C$. In addition, good thermal properties such as good thermal shock resistance and feasibility for use with a general manufacturing process during the forming of glass tubes and bulbs were noted. Therefore, it is concluded that this translucent opal glass can be used as a glass diffuser material for LED lighting due to its high heat resistance and high durability as a replacement for a polycarbonate diffuser.

• Journal of the Semiconductor & Display Technology
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• v.12 no.2
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• pp.13-17
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• 2013

In lighting system where several large-area organic light-emitting diode (OLED) lighting panels are involved, panel aging may appear differently from each other, resulting in a falling-off in lighting quality. To achieve uniform light output across large-area OLED lighting panels, we have employed an optical feedback circuit. Light output from each OLED panel is monitored by the optical feedback circuit that consists of a photodiode, I-V converter, 10-bit analogdigital converter (ADC), and comparator. A photodiode generates current by detecting OLED light from one side of the glass substrate (i.e., edge emission). Namely, the target luminance from the emission area (bottom emission) of OLED panels is monitored by current generated from the photodiode mounted on a glass edge. To this end, we need to establish a mapping table between the ADC value and the luminance of bottom emission. The reference ADC value corresponds to the target luminance of OLED panels. If the ADC value is lower or higher than the reference one (i.e., when the luminance of OLED panel is lower or higher than its target luminance), a micro controller unit (MCU) adjusts the pulse width modulation (PWM) used for the control of the power supplied to OLED panels in such a way that the ADC value obtained from optical feedback is the same as the reference one. As such, the target luminance of each individual OLED panel is unchanged. With the optical feedback circuit included in the lighting system, we have observed only 2% difference in relative intensity of neighboring OLED panels.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.1045-1048
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• 2007

We mainly report recent progress in backlight unit (BLU) for liquid crystal display (LCD) using printed carbon nanotubes (CNTs) including top-gate and lateral gate structures. Lighting performances of CNTBLU and longevity of printed CNT emitters are intensively discussed. Selected issues related with field emission display (FED) using the same emitters also are presented.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.1082-1085
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• 2006

We proposed dual mode pixel circuit in AMOLED (active matrix organic light emitting device). After light emitting period of OLED, we used it as a photo sensor. We measured photo current of OLED and simulated the proposed pixel circuit to verify it's function of dual mode, that is lighting and sensing.

• Korean Institute of Interior Design Journal
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• no.15
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• pp.3-16
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• 1998

Fashion specialty store is based on one theme called "Fashion", to pursue originality of facilities in one concept from merchandising, environmental planning and facilities management and satisfy consumer's urge quantitatively as well as qualitative]y also congreqation of characteristic space, distingtion from commor store, not only selling goods but also jointly owned funtiona] space such as information and culture. So this research. with the importance of image. to present the basic information of interior design, study on the analyzing the type of image and the factor of composition focused on the complex fashion specialty store in own brand. Ana]yzing thr type of image with preliminary research and the first and second questionnair, with this make a comparision between the factor of composition and image. The conclusion was summertized as follows : '||'&'||'#8226; Firstly, the interior image of complex fashion specialty store in own brand divided into ;) different images, Such as :VIodern, Semi Classic. Hi-Tech Ylodern, Natural. and casual image '||'&'||'#8226; Secondly, according to the factor of composition is as follows, Such as Architecture, Surface. Furniture, Lighting and Display, the factor of composition is as follows : Architectura] factor divided into vertical. horizental. flexibility and exterior, Surface : material. and main color, Furniture : form and material. Lighting : lighting fixture and genera] lighting system, and Display: window and interior display . '||'&'||'#8226; Third]y, make a comparision of image. simple and feminine with Hi-Tech, Semi-Classic toward natural. complicated, feminine. and Low-Tech, Hi Tech ~.Iodern image, toward modem. natural. simple feel and somehow feminine. Natrual image, toward modem. natura], simple, and Hi Tech, Casual image toward modm, simple, and Hi Tech. '||'&'||'#8226; Fourthly, with builaing up new space, alteration infashion specialty store focused on the customers seiling space with rest and resources, also huge character is found in fashion specialty store