• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 학술대회 논문집
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• pp.167-172
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• 2005

This study based on the experimental data on the daylight responsive dimming systems performance. The purpose of this study increases the energy-saving effects by reducing excessive intensity of radiation of artificial lighting through analyzing incident daylight. The photosensor sends amounts of detected luminous flux to digital control unit(DCU) as a signal and then, it can decide dimming ratios, by received a proper dimming signal from DCU. Generally it is effective to control artificial lighting with the different control ratio of each row by setting a photosensor as same numbers and rows as artificial lighting. However, it is ineffective to do in initial costs of systems aspect in offices. By analyzing the data of this performance and finding regular ration between photosensors. we will execute different dimming ratios to each row of artificial lighting by a single photosensor.

• 센서학회지
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• 제3권3호
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• pp.16-21
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• 1994

표준 CMOS공정으로 제작되며 게이트 콘트롤을 가지는 3단자형의 pin type 수광센서를 제안하고 이를 CMOS회로와 집적하여 제작하였다. $100{\mu}m{\times}120{\mu}m$ 크기로 제작된 수광센서의 암전류(Dark current)는 -5V에서 1nA이하, 정전용랑은 0.75pF, 항복전압(Breakdown voltage)은 -l4V이상의 특성을 보였다. 응답도는 $0.805{\mu}m$의 파장에서 0.19A/W(양자효율 30%), $0.633{\mu}m$에서는 0.25A/W(양자효율 50%)였으며 게이트에 전압을 가하면 응답도가 증가하였다. 이 수광센서를 CMOS 디지탈 인버터와 집적했을때 $22k{\Omega}$의 전달이득(Transimpedance)을 가지며 $90{\mu}A$의 광전류로 별도의 증폭단없이 인버터를 스위칭시켰다.

• 설비공학논문집
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• 제23권3호
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• pp.231-242
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• 2011

This study examines influences of a daylight dimming control system on the variation of indoor illuminance and lighting energy savings in a small office space. Field measurements and a series of computation were performed for typical types of sky conditions in summer. Results indicate that the daylight illuminance under clear and partly-cloudy sky were close to the target illuminance during a majority of time due to a higher ratio of window to wall. However, the target illuminance was not kept successfully due to the variation of photosensor signals which were strongly influenced by desktop illuminance. The system with partially-shielded conditions succeeded to keep target illuminance under clear sky conditions. The system failed under overcast sky conditions since the electric light output from fixtures caused excessive signals to photosensors due to insufficient daylight on a desktop. Unshielded and fully-shielded conditions were not recommended for effective controls of the systems. The influence of lighting fixtures on photosensors should be minimized to achieve successful lighting controls by daylight dimming systems.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.957-960
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• 2009

Sensor applications of thin-film transistors (TFTs), such as photosensor, magnetic sensor, temperature sensor and chemical sensor, are introduced. Active-matrix circuits and amplifying circuits using poly-Si TFTs are integrated with these sensors to improve sensor performances and generate additional functions. These sensors may be promising applications after flat-panel displays (FPDs) in giant-micro electronics.

• 한국세라믹학회지
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• 제56권3호
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• pp.308-316
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• 2019

CdS_xSe_1-x ternary alloy nanowires (x = 0, 0.5, 1.0) were fabricated by in-situ synthesis on interdigitated electrode. Morphology analysis of the alloy nanowires according to the synthesis zone and composition analysis of the nanowires were carried out by SEM and EDX. The crystal structures of the alloy nanowires were studied by XRD analysis. The I-V characteristics of the nanowire photosensors were analyzed according to the intensity of incident light. The influence of zonal synthesis position on the photosensor response to the wavelength of incident light was also analyzed, and was found to be related to the bandgap of alloy nanowires. The analysis results indicate that photosensors with a specific photoresponse could be selected based on the composition of the source materials of nanowires as well as by controlling the in-situ synthesis zone.

• 한국방사선학회논문지
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• 제16권2호
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• pp.157-162
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• 2022

전임상용 양전자방출단층촬영기기는 인체에 비해 매우 작은 소동물을 대상으로 촬영이 이루어지므로, 우수한 공간분해능을 지닌 검출기가 필요하다. 이를 위해 작은 섬광 픽셀을 사용한 검출기를 사용하여 시스템을 구성하였다. 현재 개발되어 사용되는 광센서의 크기는 한정되어 있으므로, 이에 맞는 최소한의 섬광 픽셀과 최대의 배열로 구성할 경우 우수한 공간분해능을 얻을 수 있다. 본 연구에서는 광센서의 크기를 고정하고, 이에 맞는 다양한 섬광 픽셀의 배열을 구성하여 평면 영상에서 겹침이 발생하지 않고, 모든 섬광 픽셀들이 구분이 되는 최대의 섬광 픽셀 배열을 찾고자 한다. 이를 위해 섬광체와 광센서로 이루어진 검출기 모듈의 시뮬레이션이 가능한 DETECT2000을 사용하였다. 3 mm × 3 mm 픽셀이 4 × 4 배열로 이루어진 광센서를 사용하였으며, 섬광 픽셀 배열은 8 × 8에서부터 13 × 13까지 구성하여 시뮬레이션을 수행하였다. 광센서 픽셀에서 획득된 데이터를 통해 평면 영상을 구성하였으며, 평면 영상과 프로파일을 통해 영상의 겹침이 발생하지 않는 최대의 섬광 픽셀 배열을 찾았다. 그 결과 평면 영상에서 서로 겹침이 발생하지 않고 모든 섬광 픽셀들이 영상화되는 섬광 픽셀 배열의 크기는 11 × 11이었다.

• 한국광과학회:학술대회논문집
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• 한국광과학회 1995년도 학술대회지
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• pp.3-3
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• 1995

• 한국태양에너지학회 논문집
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• 제26권3호
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• pp.33-43
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• 2006

Daylight dimming control system was analyzed for an indirect lighting system in a small office space with a double skin envelope system. Computer simulations were performed for photosensors with three shielding conditions. The photosensors were placed on the center of ceiling, and backwall. Three sky conditions defined by CIE were considered. Overall, control performance was not very excellent for all conditions. Fully-shielded photosensor achieved good control performance for some cases, but partially-shielded and unshielded photosensors failed to achieve target illuminance. The variation in desktop illuminance due to daylight was examined for a variety of daylight conditions. Linear correlation between desktop illuminance and photosensor illuminance was analyzed using ANOVA.

• 한국컴퓨터정보학회논문지
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• 제13권1호
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• pp.219-226
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• 2008

사람으로부터 나오는 신호는 다양하고 그 데이터의 양도 매우 많다. 이러한 신호는 누구에게나 똑같이 발생하는 것이 아니기 때문에 각각의 사람마다 발생하는 신호를 분석하면 그 사람의 건강을 분석할 수 있는 중요한 자료로서 사용되어질 수 있다. 본 시스템은 인체의 손끝은 장부와 연결되어 손끝의 정보를 활용하면 건강을 진단할 수 있다는 한의학적 진단방법을 활용하여 인체 손끝에서 나오는 맥, 온도, 저항을 반사형 포토센서로 측정하여 이를 분석하고 장부의 허실을 판단하여 건강을 진단하는 시스템이다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2003년도 학술대회논문집
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• pp.197-201
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• 2003

The purpose of this study is to analyze the slopes of control algorithm and dimming levels based on different inputs and parameters. Different parameters such as photosensor aiming angles, sky types, and seasonal changes were considered. To determine the slopes of control algorithm and dimming levels, photosensor signals and workplan illuminance values were simulated by DayDim program, which is a lighting calculation and analysis tool. A typical small office space was used for simulation and three different sky types in three different seasons were considered. This study shows that differences in dimming levels can occur according to different sky types, if system calibration is conducted in a particular sky type.