• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.1713_1714
• /
• 2009

본 연구는 LED 광원을 이용한 절전형 라인 조명제어장치의 개발에 관한 것이다. 기본 광원은 5W급 고휘도 LED Lamp를 기본적으로 1~5개의 개별 램프를 제어하며 LED Lamp의 불량상태와 운전상태 감시를 위한 정전류 방식의 구동 기능을 포함하고 여러 단계의 밝기 변화와 절전, 방열을 고려하여 PWM 방식으로 구동 밝기조절 및 점멸 주기 제어기능을 갖는다. 이장치는 도로의 라인조명용 단위장치로 구성될 수 있으며 개별적으로 중앙통제시스템과 통신제어기능을 수행할 수 있게 구성된 시스템이다.

• Journal of Industrial Technology
• /
• v.29 no.B
• /
• pp.133-137
• /
• 2009

This paper presents the development of smart road line lamp system consisting light control device. It can perform the individual power control or partial on/off control of a LED lamp by control center and can detect the error of the LEDs by current sensing. Also, the ability to control the brightness and period of on/off by detecting the car's existence. This light control circuit consists of road line lamp unit device. It can give a lot of solutions when the server, which controls the whole system, is operated through CDMA(Code-Division Multiple Access) network.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.30 no.4
• /
• pp.45-49
• /
• 2016

• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.1715_1716
• /
• 2009

본 연구는 지능형 도로의 라인조명의 제어 기능을 수행하기 위한 구동 및 조광회로 설계와 유지관리 시스템의 기초 연구로서 기본적으로 중앙관제센터에서 무선과 유선의 원격제어를 통하여 조명기구의 개별 전원 제어 또는 단전, 부분 점멸동작을 수행 하고 램프의 불량 상태를 확인할 수 있는 기능을 포함한다. 부가적으로 조명등의 절전과 효율적인 관리를 위하여 차량의 유무에 따라 조도와 점멸 제어 기능을 추가 하였다. 또한 원격제어에 따른 중계 제어 장치를 등기구와 병열 구성 하여 통신선과 전원선 만으로 Line 형태의 램프에 전력 및 통신 제어를 가능케 하는 시스템을 개발하였다.

• Journal of Industrial Technology
• /
• v.30 no.B
• /
• pp.75-81
• /
• 2010

This paper presents the development of LED street light lamp which is controled by central command system. This system includes a lamp unit controller, data repeater and command repeater as well as the LED lamps. These devices enable the individual power control and partial on/off control of the LED lamps by the control repeater through full duplex communication line. Also, they have the ability to control the brightness and period of on/off timing by detecting the car's existence. As a result of this development, it is founded that the performances of the system have been satisfied to apply for the actual road test.

• The Journal of the Korea Contents Association
• /
• v.12 no.2
• /
• pp.52-59
• /
• 2012

Recently, LEDs are used in various fields such as lightings, billboards, displays, and so on. In this paper, we tried to combine a costume with LEDs in a performance environment. To meet the environmental requirements, we propose a digital costume platform which consists of wireless network, an embedded system, a control jacket, a digital skin, and a pattern authoring tool. It is utilized for making a digital costume with LED lighting effects. The embedded system controls LED lighting according to the signals from a show control system through wireless networks. The control jacket can carry the embedded system and connect it with LEDs. The digital skin means a costume with LEDs. The LEDs were designed to fit in performance concept in point of aesthetic. The pattern authoring tool enables users to make timeline-based changing patterns of LED lighting. The proposed platform is a new lighting element in performances. It can expand stage representation techniques and be used as a special effect. It will play a role as a moving light in performances. We evaluated stable operations of our platform by employing it in live performances.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.14 no.5
• /
• pp.2113-2120
• /
• 2013

In this study, an efficient machine vision based inspection system is developed for the in-line measurement of phosphor resin dispensing shapes on LED chip package. Since the phosphor resin (target material) has semitransparent characteristics, illuminated light beam is reflected from the bottom of the chip as well as from the surface. Since such phenomenon can deteriorate inspection reliability, a white LED and a 635nm laser slit beams are experimentally tested to decide suitable illumination optics. Also, specular and diffuse reflection methods are tested to decide suitable optical triangulation. As a result, it can be known that the combination of a white slit beam source and specular reflection method show the best inspection results. The Catmull-Rom spline interpolation is applied to the obtained data to form smoother surface. From the results, it can be conclude that the developed system can be sucessfully applied to the in-line inspection of LED chip packaging process.

• 한국HCI학회:학술대회논문집
• /
• 2007.02b
• /
• pp.292-297
• /
• 2007

터치스크린을 통한 유저의 입력은 미디신호로 변환되며 생성된 블록은 하나의 음표 또는 다수의 음표로 남게 되며 유저가 설정한 타임라인의 빠르기에 따라 입력된 블록 위치의 음계 값을 토대로 소프트웨어 신디사이저의 오실 레이터에서 생성된 소리를 스피커로 출력해 낸다. 블록은 서로 다른 색깔의 8개의 미디채널로 존재하여 각 채널을 레이어 시켜 다른 블록을 생성하여 사인파, 톱니파, 삼각파, 사각파등을 엔벨로프 변형을 통해 만든 10가지 다른 소리로 지정하여 넣을 수 있다. 미디의 멀티채널방식을 이용해 다중 레이어의 입력방식을 취했으며, 관객은 작곡 모드에서는 일정한 패턴을 가진 단음이나 화성을, 게임모드에서는 생성된 공이 블록을 부딪치며 예측하기 어렵게 생성된 단음이나 화성음을 만들 수 있다. 생성한 음이 재생될 때에는 생성된 음정의 주파수 값과 음량에 따라서 RGB LED 조명이 반응을 하며 유저가 생성시킨 독특한 음악 진행에 따라 조명의 밝기와 색깔이 바뀌게 된다.

• Journal of Satellite, Information and Communications
• /
• v.7 no.3
• /
• pp.41-46
• /
• 2012

Visible light communication(VLC) system based on LED devices has some specific advantages compared with RF system. First, visible light is harmless to human and there is no limit to using frequency band. Also, VLC system has good security performance, and it can use the very wide frequency band for data transmission. However, for simultaneously using the illumination and data transmission in VLC systems, degradation of code rate is occurred. So, in this paper, we proposed the novel line coding scheme for flicker free and efficient dimming control in VLC systems. From the simulation results, it is confirmed that proposed scheme has good flicker, dimming, and transmission performance compared to conventional variable pulse position modulation(VPPM) scheme.

• Korean Institute of Interior Design Journal
• /
• v.23 no.6
• /
• pp.78-86
• /
• 2014

Lighting in indoor space is being changed to system lighting converged with IT technology. Office space lighting with incandescent lamps and fluorescent lamps was completed through overall lighting plan by illumination in most cases, but convergence between LED lighting and IT technology enables the technology of responding to user requirements to be realized. Optical physical quantity suitable for humans and the lighting environment in accordance with user's sensibility, based on space function and user's behavior, would contribute to the improvement of service productivity, energy reduction, and enhancement of emotional satisfaction by providing user optimized lighting solution. Thus, user-customized system lighting guidelines to be applied with integration indicators of optics and sensibility are required. For the design elements required by users, environmental factors, product characteristics, optical characteristics, and sensibility factors are drawn from the design cases for office space and the survey, and the design check list and evaluation indicators are considered to reflect the requirements in the design and requirement indicators to give integrated satisfaction for optics and sensibility are developed. Purpose-centered design method from the user's viewpoint is applied to function-focused design through scenario, and it should be applied flexibly, as the new lightning design method solutions, to the concept design stage of space lighting design and device development. This paper, therefore, presents user-customized guidelines by pursuing the optics and sensibility evaluation and design method combining the requirement conditions and scenario, to be used for lighting content development and design.