• Proceedings of the Korean Society of Computer Information Conference
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• 2015.07a
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• pp.107-108
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• 2015

본 논문에서는 조용히 해야 할 공간에서 사용할 수 있는 LED Matrix를 이용한 스마트 폰 알림 시스템에 대해 기술 하고자 한다. 스마트 폰 알림 시스템은 스마트 폰과 LED Matrix와 블루투스로 연결된 상태에서 평상시에는 날씨 패턴이나 온도패턴 등 LED Matrix에 표시되고, 스마트 폰에 전화가 왔을 시 LED Matrix가 전화패턴으로 바뀌면서 알려주게 되고 문자가 왔을 때 또한 문자패턴이 표시된다. 만약 전화나 문자 온 것을 인지 못 했을 시 왼쪽 위 끝에 LED로 부재중 표시가 된다. 또한, 실시간 패턴 그리기로 패턴을 사용자가 직접 만들 수도 있다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.4
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• pp.47-53
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• 2013

Nowadays, Advanced country have devised a plan energy-saving through lighting effectiveness and increasing performance of lighting control system. If it uses the LED as a source of light then conserve electricity by 50%. This paper implement LEMS(Lighting Energy Management System) that applicate and Smart Dimmer and Smart Switch that control the digital LED light, support wired-wireless communication using USN(Ubiquitous Sensor Network). This system of validity and reliability control special purpose lamp including indoor and outdoor lighting and landscape lighting effectively. It minimize the use of indoor and outdoor lighting energy by USN remote integral control function of Digital System Lighting of LED and increase effectiveness of energy and is a collaborative system that can feedback the use of electricity by measurement itself through Web and Switch.

• Proceedings of the Korean Society of Computer Information Conference
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• 2013.07a
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• pp.421-422
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• 2013

본 논문에서는 기존 전광판의 문제점을 보안할 수 있는 방법의 하나로 3차원 LED 디스플레이와 이를 제어할 수 있는 안드로이드 앱을 제안하고 구현하였다. 2차원 매트릭스 방식을 사용하고 있는 현재의 전광판을 3차원으로 확장함으로써 다양한 정보 전달이 가능하며 제어를 위해 별도의 하드웨어를 사용하지 않고 안드로이드 앱으로 블루투스 통신을 통해 제어함으로써 간편하면서도 확장이 용이한 제어 구조를 가질 수 있다.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.8
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• pp.185-194
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• 2014

In this paper, we proposed the clothing management system using the smart hanger. Proposed system consists of smart hanger, base module, and server, and the smart hanger consists of MCU, LED, RFID reader, RF chip, ring sensor, and battery. The smart hanger reads the RFID tag attached to the clothes and wirelessly transmitted to the server. The server associated base module communicates with the smart hanger and transmits information to the server. The server manages clothing through the DB, and can display various information through the web page and the smart phone. In order to verify the usefulness of the proposed system, we did experiment with the management system for clothing store and laundry where using a lot of hangers. Performance tests of the smart hanger are applied to check the current consumption and can be predicted the battery life with the proposed low power algorithm. The clothing store management system can be increased sales and convenience of the consumer. The laundry management system can be increased the efficiency of laundry category and convenience of the consumer.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.01a
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• pp.135-136
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• 2015

본 논문에서는 무선 랜(Wi-Fi)을 통하여 학습 환경 구축을 위해 LED 조명 색 온도를 제어하는 방법을 설명 하고, LED 조명을 위한 Android App 개발 과정을 설명한다. 스마트폰과 LED 조명은 Wi-Fi를 통해 통신하며, JAVA언어로 개발한 Android App을 이용하여 학습 주제에 따른 색온도(Color Tempeaure)로 제어하게 되면 LED 조명 색온도가 변경되어 학습 환경 구축이 완료되어, 집중력 향상으로 인한 학습 능률이 증가된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.892-893
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• 2016

최근 효과적인 정보 전달을 위해 다양한 매체가 사용되고 있다. 이중 LED 기반의 전광판은 상업적 광고를 효율적으로 보여주는 대표적인 정보 전달 및 광고 매체 중 하나이다. 이와 같은 LED기반의 전광판은 옥외에 부착되는 경우가 많아 표시할 문구를 수정하거나 갱신하는데 어려움이 있을 수 있다. 이와 같은 문제점을 개선하기 위해서 본 논문에서는 LED 기반 전광판의 보다 손쉬운 사용을 위해 스마트 폰 애플리케이션을 이용하여 간편하게 문구를 편집하고, LED에 표출되는 효과를 설정할 수 있는 스마트 전광판을 설계하고 구현하였다. 구현된 프로토타입을 통해 제안된 스마트 전광판의 효율성과 실효성을 검증하였다.

• Journal of Information Technology Applications and Management
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• v.25 no.3
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• pp.55-66
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• 2018

Early smart-work of company K was a technology-led way of applying ICT such as smart phones and mobile devices to business. After company K perceived the limitations of ICT-driven smart work, it propelled the work-smart, doing a work smart toward the way that human beings become central and a creative organizational culture is engendered. Company K propelled work-smart strategy in eight categories: simplification of data requirements, establishment efficient meeting culture, streamlining reporting and approval process, simplified document creation, overtime decrease, spreading flexible work system, settlement of healing leave, creating work-smart place. Company K set up an organizational culture secretariat dedicated to work-smart promotion and selected task priorities in consideration of urgency and effectiveness. Owing to such efforts, the company K's work-smart index rose sharply to 72 points this year from 56 points in the previous year. At the organizational culture survey, employees responded that organizational culture improved in all area. For a better future, company K analyzed its work-smart outcomes and planned progressively to improve its work-smart efforts based on employees opinions. This case study will serve as a guideline, for companies to make efforts to going forward to today work-smart beyond yesterday smart-work.

• Smart Media Journal
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• v.11 no.9
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• pp.21-29
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• 2022

Ultra Violet(UV) is gradually being replaced with LED instead of general UV lamps. However, the light efficiency of UV LED is still lower than that of the general lamp, and the light efficiency is also low. Due to the current environment and technical problems of UV lamps, the LED replacements are gradually being made. In this study, a new package design and analysis were performed to increase the lifetime and performance of UV LEDs. A new packaging for UV LED were designed and implemented. The new packaging for UV LED was constructed to improve light efficiency. And the electrical and optical characteristics were analyzed respectively. To improve the optical efficiency in UV LED package, the Al has been used based on high reflectivity and applying the optimal lens focusing. Compared to the existing silver Ag, the light efficiency was improved by about 30% or more, and it was confirmed that the light output degradation characteristic was improved by about 10% in the newly applied optical device chip.

• 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.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.11
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• pp.2113-2118
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• 2016

Smart Jewelry is applied to the components of the Internet of Things. The process of obtaining the status information to the input of the sensor. And it controls the light color of the LED. Because to express the beauty of twinkling lights that can be felt in the jewelery and aesthetic functions were applied in order to feel the mystery. Smart Jewelry is capable of communication, interaction, wearable. Smart jewelery was equipped with a color, temperature, ambient light sensor. It was designed to allow interaction with a Bluetooth module. Applying an algorithm so that the light jewelry colors can vary depending on the circumstances of the smart jewelry wearer had been implemented by the mobile application. It can be realized in digital technology and the convergence of life. It presents the orientation development of the smart jewelery device on IoT environment.