• Title/Summary/Keyword: small screen

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Development of Frame Buffer Structure for Automatic Dynamic Resolution Switching on Android Mobile Platform (안드로이드 모바일 플랫폼에서의 동적 해상도 자동전환을 위한 프레임버퍼 구조 개발)

  • Kim, Ju-Sung;Kwon, Oh-Chul;Lee, Chang-Gun
    • Journal of KIISE:Computing Practices and Letters
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    • v.16 no.12
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    • pp.1209-1213
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    • 2010
  • This paper presents a technique for an Android mobile device to best utilize its surrounding external display device such as high-definition TV, in order to overcome the size and resolution limitation of the small LCD in the mobile device. Unlike current techniques that simply expand the LCD screen image to an external large display, our technique dynamically changes the resolution adapting to capability of the external display. And, the original screen become a remote controller.

Correlations between Users' Characteristics and Preferred Features of Web-Based OPAC Evaluation

  • Kim, Hee-Sop;Chung, Hyun-Soo;Hong, Gi-Chai;Moon, Byung-Ju;Park, Chee-Hang
    • ETRI Journal
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    • v.21 no.4
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    • pp.83-93
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    • 1999
  • This paper examines the correlations between user characteristics and their perferences for two selected features of Web-based OPAC systems. User characteristics identified in this study were age, gender, educational status, computer skills and OPAC experience. Usability features included interaction styles, character and image on screen, browsing and navigating style, screen layout, and ease of learning, whereas availability features attended to availability of information, quality of information and up-to-date information. Individual variables and features are described, and the correlation between the variables and the features are explored using Pearson's correlation coefficient(r). Although based on a small-scale sample survey, a considerably large number of statistically significant correlations were found between the users' characteristics and the selected evaluation features of interactive Web-based OPACs. From these observations, it seems to be suitable to recommend that system designers should make a more considered appraisal of the users' demographic characteristics in the design of the new generation of OPAC such as in user-tailored interactive Web-based OPAC systems.

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Constructing the Development of Solids by Personal Computer (개인용 컴퓨터를 이용한 전개도 작성에 관한 연구)

  • 채희창;정인성
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.14 no.2
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    • pp.367-375
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    • 1990
  • A data structure representing 3-D objects was designed for the personal computer. It is very simple to be used in the personal computers which have small memory and low speed. A homogeneous transformation for developing 3-D objects was derived. Each developing procedure consists of five transformations : one translational-three rotational-one translational. Developing a solid is a creative work. So the results of developing vary with the order of surfaces to be developed. One method to reduce the length of seam was considered. The programs used in this study were written in Pascal and Assembly and a modeller that generates 3-D primitives was included. This program is an interactive dual-screen system. While all the menus in Korean are displayed at the monochrome monitor, the development figures with projective views are drawn at the color monitor. The program has wide applications for plate works.

Universal Stereoscopic Display Using 64 LCD's

  • Takaki, Yasuhiro
    • 한국정보디스플레이학회:학술대회논문집
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    • 2002.08a
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    • pp.289-292
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    • 2002
  • A new technique to construct an auto-stereoscopic display that offers massive horizontal parallax images is proposed Multiple telecetnric imaging systems are arranged in a modified 2D array. The horizontal parallax images displayed by LCD panels are imaged to be superimposed on a 3D screen. All parallax images are displayed in the different horizontal directions because all imaging systems have different horizontal positions. The difference of the vertical display directions due to the imaging system's vertical positions is canceled by a vertical diffuser placed at the 3D screen. Observers can percept 3D images with the binocular disparity, the vergence, and the smooth motion parallax. In addition, the accommodation function may also work because a number of parallax images are displayed with a very small angle interval in the horizontal direction. A prototype 3D display including 64 color LCD panels was constructed.

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SATS: Structure-Aware Touch-Based Scrolling

  • Kim, Dohyung;Gweon, Gahgene;Lee, Geehyuk
    • ETRI Journal
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    • v.38 no.6
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    • pp.1104-1113
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    • 2016
  • Non-linear document navigation refers to the process of repeatedly reading a document at different levels to provide an overview, including selective reading to search for useful information within a document under time constraints. Currently, this function is not supported well by small-screen tablets. In this study, we propose the concept of structure-aware touch-based scrolling (SATS), which allows structural document navigation using region-dependent touch gestures for non-sequential navigation within tablets or tablet-sized e-book readers. In SATS, the screen is divided into four vertical sections representing the different structural levels of a document, where dragging into the different sections allows navigating from the macro to micro levels. The implementation of a prototype is presented, as well as details of a comparative evaluation using typical non-sequential navigation tasks performed under time constraints. The results showed that SATS obtained better performance, higher user satisfaction, and a lower usability workload compared with a conventional structural overview interface.

Effects of Constituents in CNT Pastes on the Field Emission Characteristics of Carbon Nanotubes

  • Kim, Suk-Hwan;Lee, Dong-Gu
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.24 no.3
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    • pp.245-249
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    • 2011
  • Carbon nanotubes (CNTs) have been significantly used for the field emitters for display applications. However, the lifetime of CNT emitters which are formed by screen printing technique is not guaranteed yet, because the constituents in CNT paste affect the lifetime of CNTs. The CNT pastes for screen printing are normally composed of organic vehicles (nitro cellulose, ethyl cellulose, etc) and additives (glass frits, indium tin oxide (ITO), etc) with CNTs. In this study, the effects of constituents in CNT pastes on the lifetime and emission characteristics of CNTs were investigated by thermal and electrical analysis. Use of glass frits worsened the lifetime and electron emission of CNTs. However, an addition of ITO to CNT paste rather improved the lifetime of CNTs. Degradation of CNTs was small when nitro cellulose was used in CNT paste as an organic vehicle.

Keypad Method Using Touch-based Drag (터치기반 드래그를 이용한 키패드 방법)

  • Kwon, Soon-Kak;Kim, Heung-June
    • Journal of Korea Multimedia Society
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    • v.17 no.10
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    • pp.1213-1219
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    • 2014
  • Keypad used in the portable terminal based on the touch screen such as current smart phones is complex on the input method because of placement for use a small screen on a character or number button and is inconvenient. In this paper, we propose a combination method for the Hangul through touch and drag. First, only keypad for consonants is displayed, if a single consonant is selected by touch, then the keypad for vowels will be displayed around the consonant. Dragging in the keypad is combined into a vowel by depending on the drag path. This method can input Hangul by rapid and intuitive process compared to conventional methods. Simulation results show that the proposed method is very efficient in terms of speed and convenience compared to the conventional methods.

Implementation of Shooting game using collision detection algorithm of (사각형 충돌감지알고리즘을 사용한 슈팅게임 구현)

  • Seo, Jeong-Man;Han, Sang-Hoon;Lee, Ho
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.3
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    • pp.187-192
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    • 2006
  • We reviewed the collision event with pc-based shooting games and existing collision detection algorithms. Then we proposed a new collision check technique using a small quadrilateral unit. by which existing quadrilateral collision detection techniques can be made up for. For demonstration we implemented a simple shooting game having its screen output. We proved that the proposed technique can be applied to real computer games by means of showing the experimental results and screen outputs from implemented real games.

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New design and its characteristics of full color anode panel for field emission display

  • Han, J.I.;Park, S.K.;Kim, W.K.;Kwak, M.G.
    • Journal of Korean Vacuum Science & Technology
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    • v.3 no.1
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    • pp.90-94
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    • 1999
  • Field Emission display (FEDs) require enhancement in both driving methods and process techniques to improve the display image quality. However, from the point of view of manufacturing, it is difficult to find methods and techniques to realize low cost manufacturing. New and simple color phosphor screen designs were suggested with non-crossed electrode lines and full color anode panels for small area displays were demonstrated. To avoid unwanted reaction with gases produced from phosphors in a high vacuum glass container, a very thin polyimide layer was coated on the phosphor screen. Moreover, to improve the display image quality, black matrix composed of inorganic materials was fabricated. This paper describes the performance and characteristics of the new full color anode panels.

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Tangible Interaction : Application for A New Interface Method for Mobile Device -Focused on development of virtual keyboard using camera input - (체감형 인터랙션 : 모바일 기기의 새로운 인터페이스 방법으로서의 활용 -카메라 인식에 의한 가상 키보드입력 방식의 개발을 중심으로 -)

  • 변재형;김명석
    • Archives of design research
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    • v.17 no.3
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    • pp.441-448
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    • 2004
  • Mobile devices such as mobile phones or PDAs are considered as main interlace tools in ubiquitous computing environment. For searching information in mobile device, it should be possible for user to input some text as well as to control cursor for navigation. So, we should find efficient interlace method for text input in limited dimension of mobile devices. This study intends to suggest a new approach to mobile interaction using camera based virtual keyboard for text input in mobile devices. We developed a camera based virtual keyboard prototype using a PC camera and a small size LCD display. User can move the prototype in the air to control the cursor over keyboard layout in screen and input text by pressing a button. The new interaction method in this study is evaluated as competitive compared to mobile phone keypad in left input efficiency. And the new method can be operated by one hand and make it possible to design smaller device by eliminating keyboard part. The new interaction method can be applied to text input method for mobile devices requiring especially small dimension. And this method can be modified to selection and navigation method for wireless internet contents on small screen devices.

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