• The Journal of the Korea Contents Association
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• v.18 no.1
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• pp.487-492
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• 2018

The purpose of the study is discovering the effects of different VR devices in learning. For this purpose, this study conducted experiments in HMD and Tablet PC learning environments to analyze differences in device characteristics according to technological evolution. In the experimentation, 37 test subject members were involved and Talklish program, English education service, were used as a learning content. The results showed that the learning method using HMD VR has a higher level of immersion, social consciousness, and learning motivation than Tablet PC methods.

• Journal of the Korean Society for Computer Game
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• v.31 no.4
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• pp.185-195
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• 2018

As virtual reality technology has gained popularity from people, various contents have appeared. Virtual reality game making good use of virtual reality device has received lots of attention from users and market. A number of virtual reality games have been developed. Virtual reality game allows users to feel presence and flow to be maximized through virtual reality device. A user can interact with several items through interface of device in display environment of virtual reality. This study was find a way to arouse an interest and induce users to be immersed in virtual reality game by maximizing above mentioned characteristics. This study was analyze interaction items in popular virtual reality game and interface design methods before presenting design methods. This study was make a comparative analysis of interface design methods centering on virtual reality game cases and examine a link between interface and interaction items. Through this study, it is expected that this will be a prior study that will be the basis for designing interfaces for virtual reality games that are more presence.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.3
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• pp.23-28
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• 2018

Next generation displays show a trend of evolving from the display device environment (represented by existing televisions) to the mobile environment. The mobile display corresponding to the personal display is similar to a home theatre; however, they are advantageous because they are small and have a relatively lower weight. Therefore, the display industry has an interest in diverse product applications of displays, reproducing more accurate colours, and offering improved image quality from display devices of various sizes. To address these interests, a psychophysical experiment was conducted in this research. The experiment compared the size of the colour stimulation corresponding to foveal vision by gradually increasing the lightness of the background. This was based on the assumption of possible differences in colours being recognized by the lightness of the background and the size of the colour stimulation. Contrary to the results of previous studies, where the colours are identified more clearly as the size of the colour stimulation increases (assuming that the lightness of the background is not considered) here the results of the experiment showed that the attributes of the identified colours were different depending on the lightness of the background and the size of the colour stimulation. Based on the experimental results, it is possible to resolve errors in colour conversion that can occur when the input image is switched from a large screen size to a mobile size display, and to reproduce the colours more accurately and improve the image quality.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.08a
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• pp.9-9
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• 2010

최근들어 디스플레이 산업의 연구 방향이 3-any (any-time, any-where, any-position)에 대응하기 위해 고품위 디스플레이 디바이스에 집중되고 있는 상황이다. 이로 인해 flexible 기판에 다양한 소자기술을 접목하는 연구가 중요 기술로 각광을 받고 있다. 본 연구에서는 flexible 기판상에 전극층, 채널층, 절연층, 및 보호막층을 형성하는 방법으로 적용되고 있는 박막 형성기술 중 물리증착기술을 적용한 진공박막 권취 장비(roll-to-roll vacuum coating system)의 핵심 기술과 투명전극의 대표적인 물질인 인듐주석산화물 박막의 특성에 대해서 심도 깊게 살펴보고자 한다. 먼저, 다양한 권취장비를 기준으로 물리증착 기술 중 적용이 가능한 공법을 간락히 설명한 후 다양한 박막 형성 기술을 소개하고자 한다. 진공증착 기술을 적용한 다양한 시스템과 스퍼터링 기술의 핵심인 다양한 캐소드의 장단점을 시스템 사례를 기준으로 설명을 하고자 한다. 또한, flexible 기판 적용시 박막층과 기판층간의 계면 특성을 향상시키기 위해 적용되는 플라즈마 표면처리 기술을 핵심 단위 기술의 연구 사례를 기준으로 기술 동향을 설명하고자 한다. 물리증착법의 대표적인 예인 스퍼터링 법으로 제조한 인듐주석산화물 박막의 특성을 제어한 연구 결과를 보고하고자 한다. 투명전극 박막의 대표물질인 인듐주석산화물 박막을 물리증착공법으로 제조하였을 때 발생하는 표면 조도의 문제를 해결하는 방안으로 초저압 스퍼터링 기술을 소개하였고, 스퍼터링 공정시 공정압력의 변화가 인듐주석산화물 박막의 표면조도, 결정구조, 및 전기적 성질에 미치는 영향과 상관관계를 살펴보았다.

• Journal of the Semiconductor & Display Technology
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• v.13 no.4
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• pp.91-96
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• 2014

Mobile image retrieval is one of the most exciting and fastest growing research fields in the area of multimedia technology. As the amount of digital contents continues to grow users are experiencing increasing difficulty in finding specific images in their image libraries. This paper proposes a new efficient and effective mobile image retrieval method that applies a weighted combination of color and texture utilizing spatial-color and second order statistics. The system for mobile image searches runs in real-time on an iPhone and can easily be used to find a specific image. To evaluate the performance of the new method, we assessed the iPhone simulations performance in terms of average precision and recall using several image databases and compare the results with those obtained using existing methods. Experimental trials revealed that the proposed descriptor exhibited a significant improvement of over 13% in retrieval effectiveness, compared to the best of the other descriptors.

• Proceedings of the KIEE Conference
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• 2003.11c
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• pp.492-495
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• 2003

최근들어 내장형 시스템의 설계에 있어서 고도의 집적화와 동작주파수 증가 및 이동형 시스템 수요 증가로 인해 전력 소모에 대한 중요성이 계속적으로 증가하고 있다. 이러한 제약을 해결하기 위해 태스크 형태의 소프트웨어가 나타나기 시작했다. 기존의 일반적인 내장형 시스템에서는 슈퍼루프(Super-loop) 형태의 소프트웨어가 기반을 이루고 있는데 이 구조내에 서는 저전력 모드 구현이 어렵다. 저전력 모드 진입 시점과 복귀 시점을 정하기가 어럽고 바꾸더라도 전체 시스템에 영향을 미치기 때문에 전체를 다 수정해주어야 한다. 하지만 태스크 형태의 내장형 소프트웨어에서는 각 태스크들이 독립적으로 돌아가고 태스크 내에서만 저전력 모드를 적용하게 되면 쉽게 저전력 모드 구현이 가능하다 이는 기능의 다양화와 복잡성에도 쉽게 대응할 수 있다는 일반적인 태스크 형태의 소프트웨어가 갖는 특징을 잘 나타내준다. 일반적으로 태스크 구조의 소프트웨어는 재사용성이 높아지고 실시간 운영체제를 사용함으로서 실시간 성능이 향상된다. 본 논문에서 보여주는 모델은 디바이스에 의존적이면서 빠른 응답시간을 요구하는 평면 디스플레이를 위한 소프트웨어이다. 태스크 기반의 소프트웨어에서 유휴 상태(idle state)를 활용하는 것을 기반으로 구현하였고, 이는 기존 슈퍼루프형태의 소프트웨어에 비하여 전력소모량이 줄어듬을 보여준다.

• Journal of the Semiconductor & Display Technology
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• v.20 no.3
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• pp.184-188
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• 2021

In general, digital signage is a next-generation smart media that provides various information and advertisement services to many people indoors or outdoors using the Internet. Recently, digital signage is rapidly spreading in such a small indoor environment, that is, in an area closely related to daily life, for example, inside an elevator. However, in this kind of indoor environment where the stay time of persons is extremely limited, it would be not easy for them to keep advertisements in the user memory for a long time. In the digital signage display installed in an indoor environment, it is possible to think about the possibility for a function such as expanding the screen to a user's smartphone, which is now widely spread, to contain, store, and use the transmitted content. In this paper, we propose a method to extend the display of digital signage contents to personal smart phones with interaction function in such a limited environment. In order to make the system operation, the proposed system was verified by confirming the result of dual screen implementation in a smart phone through the prototype implementation of a digital signage system in an embedded Linux environment.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.803-806
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• 2010

본 논문에서는 스크린을 터치를 하지 않고 또한 스크린의 영역의 크기에 상관없이 제스처를 이용하여 인터랙션이 가능한 제스쳐 인식 모듈을 이용한 대규모 멀티 인터랙티브 디스플레이 시스템을 제안한다. IR laser를 이용하여 인터랙션 영역을 생성하고 band pass filter를 장착한 적외선 카메라를 이용하여 인터랙션 영역 안의 영상을 획득한다. 획득되어진 영상은 제안하는 영상처리모듈을 이용하여 이진화->블랍-라벨링 과정을 거쳐 잡음을 제거한 후 인터랙션 영역 안에서 이루어지는 인터랙션 좌표를 획득한 후 Packet으로 저장한다. 저장 된 Packet은 네트워크 통신 시스템을 이용하여 Server로 보내어지고 Server에서는 메타포분석모듈을 이용하여 분석하여 결과를 메타포이벤트로 저장한 후 콘텐츠에 보낸다. 콘텐츠에서는 받은 메타포이벤트에 따라서 콘텐츠 결과를 보여 줌으로써 스크린을 터치 하지 않아도 터치 인터랙션이 가능하며 스크린 영역에 제한 없이 많은 사용자가 동시에 사용이 가능한 시스템 사용이 가능하도록 한다. 본 시스템은 향후 보다 다양한 인터랙션과 시스템 크기의 확장으로 보다 많은 사용자가 동시에 사용가능하며 다양한 인터랙션을 사용할 수 있는 인식 디바이스로써 활용이 가능하다.

• Journal of Digital Contents Society
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• v.16 no.4
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• pp.513-522
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• 2015

Various types of digital displays from PC monitor up to smart watch have been developed in response to the dramatic technological progress of electronics. Accordingly, web content creators have the need to provide web contents respectively depending on the different display environments, which increases production time and costs. As a technique for overcoming this, the responsive web design method has been proposed, which means a web page with the size of the screen being adjusted depending on the types of display. Although the responsive web system is increasingly implemented in the region of contents search pages of domestic portals, there are still many cases that contents are implemented separately for PC and for mobile. In this paper, we investigate the responsive types of the web implementation of contents search pages of domestic portal, and propose an efficient new UI for responsive web to individual types of contents search pages which responsive design is not applied to.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.400-403
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• 2018

The VR / AR market has grown significantly due to the development of Virtual Reality and Augmented Reality, the core technologies of the Fourth Industrial Revolution. According to a report released by the Korea Science and Engineering Corporation (KISTEP), the global VR / AR market will grow to $ 105 billion by 2022. An important key to the growth of the VR / AR market is user immersion. VR is dependent on technology of hardware such as display and sensor for biometric signal recognition. In order to improve user's immersion feeling, it is important to transmit sensor data to display device more accurately and quickly. In this paper, we consider various sensor hardware dependencies of VR, and compare various correction methods and filtering methods to lower the Motion to Photon (MTP) time that user movement is fully reflected on the display using sensor devices.