• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.560-562
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• 2010

Nowdays, The LED Illumination system can achieve lower power consumption and has a longer life-time compared to the fluorescent lamp system. Visible Light Communication(VLC) is wireless optical communication to use visible light of LED. This paper designs the indoor navigation of Location-Based Service(LBS) using LED illumination. and the parking guidance system using VLC in the underground parking lot. We show the result of experimentation and confirm possibility of the parking guidance system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.2
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• pp.145-152
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• 2011

Stage-broadcasting Fresnel and Plano Convex Lighting fixture were fabricated. Compare illumination simulation and measured values for Fresnel and Plano Convex fixture. After made Lighting install studio motor system construction. In studio Daejeon Health Sciences College we measured illuminance and simulation in order to compare Fresnel and Plano Convex Lighting. And we study how much different illuminance between Fresnel and Plano Convex Lighting. In the result of comparison of simulation Fresnel and Plano Convex Lighting fixture are measures of difference value 39.7~250.6Lux and comparison of actually Fresnel and Plano Convex Lighting fixture are measure of difference value 92.84~157.35Lux.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.3
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• pp.66-72
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• 2016

An LED lighting control system was developed to combine information technology and LED lights for efficient management and energy savings. The system can monitor and control the status of an LED luminaire using Bluetooth wireless communication, sensor technology, and smart phones. An LED lighting control circuit was designed using a temperature sensor, illumination sensor, and Bluetooth module with a fuzzy constant-current control circuit. We extended the lifetime and prevented damage to the LED by optimizing the supply current of the LED luminaire based on the heat-generation temperature of $70^{\circ}C$ of an LED heat sink. We also automatically adjusted the ON/OFF time depending on the ambient illumination of the LED luminaire. By allowing easy control of the LED luminaires on a smartphone, we improved the efficiency and achieved energy savings. The control system was validated through experiments for normal operation.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.5
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• pp.77-83
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• 2013

Nowadays, the limitation of Lighting control and management skills is the excessive cost of equipments, the operational difficulties and wasting energy. To solve this problem is in need of communication and management S/W that is worked out complexly well as a information system of smart lighting energy, which is loaded wireless network facility. This paper made a study od the energy saving technology through energy monitoring and we developed LEIS(Lighting Energy Information Sysem) to converge this one. LEIS is monitoring and control lighting energy data that is collelcted from sensors by Zigbee mesh network and shows lighting use information by visualization to users. It is consists of lighting energy information data base based on LEM(Lighting Energy Metering) information and LEIS Web application, provide function scenario to manage energy optimization through LEIS.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.10a
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• pp.101-104
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• 2008

This paper is a report of designing for LED lights driver unit. The main purpose of driver designing is high electrical efficient performance and intelligent control LED driver. This LED driver can be used for intelligent light control. This product expects to improve the light control by dimming instead of interlace on/off light control that increases the social cost such as car accidents and etc.

• Proceedings of the KAIS Fall Conference
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• 2010.05a
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• pp.142-145
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• 2010

본 논문에서는 적외선 조명을 이용한 밝은 동공 효과와 전형적인 외형을 기반으로 한 사물 인식 기술을 결합하여 외부 조명의 간섭으로 밝은 동공 효과가 나타나지 않는 경우에도 견실하게 눈을 검출하고 추적 할 수 있는 방법을 제안한다. 눈 검출과 추적을 위해 SVM과 평균 이동 추적방법을 사용하였고, 적외선 조명과 카메라를 포함한 영상 획득 장치를 구성하여 제안된 방법이 효율적으로 다양한 조명하에서 눈 검출과 추적을 할 수 있음을 보여 주었다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.1
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• pp.17-23
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• 2008

In this paper, we used "Double Photometric System for Road Lighting" and measured roadway lighting of the metropolitan area by a measurement of illuminance and luminance. As a result, so many roads were dissatisfied with the permitted range of roadway lighting because of the road shape, lighting method, trees lining a street and obstacles.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.971-974
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• 2014

Reflect the social concerns of recent energy saving in this paper. The LED market is continuing to grow continuously. But it is now high light energy conversion led lights., We propose converting the light energy-saving method for these LED lights. Generated the cumulative loss of the conversion done at each light change from the current power of the LED lights. The cumulative loss to achieve minimal energy loss resulting from the improved performance.

• Annual Conference of KIPS
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• 2017.04a
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• pp.138-139
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• 2017

세계적으로 에너지 과다 사용으로 인한 비상사태가 발생하면서 에너지 절감, 그린 에너지에 대한 관심이 증가하고 있다. 특히 블루투스 기반의 네트워크 구성을 통해 중앙 조명 제어가 이루어지고 있다. 그러나 블루투스는 저전력 기술 중 높은 전력을 소모하기 때문에 조명기기가 증가할수록 전력사용량이 증가하기 때문에 저전력을 유지하기 어렵다는 문제점이 있다. 따라서 본 논문에서는 Zigbee 기술을 기반으로 조명기기를 제어할 수 있는 시스템을 설계하였다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1913_1914
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• 2009

본 논문에서 조명환경하에서 음성/영상 연동시스템을 통해서 외부음향잡음의 차단을 위한 강인한 입술움직임 영상영역을 추적하는 한 가지 방법을 제안한다. 조명환경하에서 강인한 입술움직임 영상영역을 추적하기 위해 온라인상에서 입술움직임 표준영상을 수집하였고 다양한 조명환경에 적응하는 입술 움직임 영상의 특징들을 추출하였다. 동시에 온라인 템플릿 영상을 획득하였고, 이 영상들을 템플릿 정합을 위해 사용했다. 음성/영상처리시스템의 연동결과, 다양한 조명환경하에서 그 연동률을 99.3%까지 높일 수 있었고 음향잡음에 의한 음성인식 실행을 원천적으로 차단할 수 있었다.