• Title/Summary/Keyword: Double touch

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One-touch Descending Lifeline with Sliding Linkage Structure (슬라이드 링크 구조를 이용한 원터치 완강기)

  • Kim, Wonchan;Na, Dayul;Moon, Hyein;Kim, Sang-Hyun
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.20 no.9
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    • pp.42-47
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    • 2021
  • A one-touch descending lifeline that can easily be installed and rapidly evacuated in the event of a fire accident in high-rise buildings was proposed to overcome difficulties of conventional descending lifeline such as complex installation methods and procedures. However, this lifeline exhibits limitations such as restrictions in installation location and large apparatus size. Therefore, this paper proposes a sliding-type descending lifeline, which has a similar operation to that of current one-touch descending lifeline and solves the aforementioned limitations. A double square link mechanism including a sliding four-bar linkage is proposed and the descending lifeline support is redesigned to unfold in two different planes, allowing 3D movement. Additionally, the shape of the support frame is designed to obtain two attachment surfaces that can be attached to a wall, irrespective of the angle between the window and the inner wall. FEA analysis using ABAQUS is performed to ensure that the robustness of the presented support complies with the Fire Control Act Enforcement Decree. Finally, the feasibility of the proposed sliding one-touch descending lifeline is verified through fabrication.

Design and Implementation of Low Power Touch Screen Controller for Mobile Devices (모바일용 저전력 터치 스크린 제어 회로 설계 및 구현)

  • Park, Sang-Bong
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.12 no.6
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    • pp.279-283
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    • 2012
  • In is paper, we design and implement the low power, high speed touch screen controller that calculates and outputs the coordinate of touch point on the touch screen of mobile devices. The system clock is 10HMz, the number of input channels is 21, standby current is $20{\mu}A$, dynamic range of input is 140pF~400pF and the response time is 0.1ms/frame. It contains the power management unit for low power, automatic impedance calibration unit in order to adapt to humidity, temperature and evaluation board, adjacent key and pattern interference suppression unit, serial interface unit of I2C and SPI. The function and performance is verified by using FPGA and $0.18{\mu}m$ CMOS standard process. The implemented touch screen is designed for using in the double layer ITO(Indium Thin Oxide) module with diamond pattern and single layer ITO module for cost-effective which are applied to mobile phone or smart remote controller.

A Fully-Differential Correlated Doubling Sampling Readout Circuit for Mutual-capacitance Touch Screens

  • Kwon, Kihyun;Kim, Sung-Woo;Bien, Franklin;Kim, Jae Joon
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.15 no.3
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    • pp.349-355
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    • 2015
  • A fully-differential touch-screen sensing architecture is presented to improve noise immunity and also support most multi-touch events minimizing the number of amplifiers and their silicon area. A correlated double sampling function is incorporated to reduce DC offset and low-frequency noises, and a stabilizer circuit is also embedded to minimize inherent transient fluctuations. A prototype of the proposed readout circuit was fabricated in a $0.18{\mu}m$ CMOS process and its differential operation in response to various touch events was experimentally verified. With a 3.3 V supply, the current dissipation was 3.4 mA at normal operation and $140{\mu}A$ in standby mode.

Highly Sensitive and Transparent Touch Sensor by a Double Structure of Single Layer Graphene

  • Kim, Youngjun;Jung, Hyojin;Jin, Hyungki;Chun, Sungwoo;Park, Wanjun
    • Proceedings of the Korean Vacuum Society Conference
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    • 2014.02a
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    • pp.228.2-228.2
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    • 2014
  • Characteristics of high Fermi velocity, high mechanical strength, and transparency offer tremendous advantages for using graphene as a promising transparent conducting material [1] in electronic devices. Although graphene is a prospective candidate for touch sensor with strong mechanical properties [2] and flexibility, only few investigations have been carried out in the field of sensor as a device form. In this study, we suggest ultra-highly sensitive and transparent graphene touch sensor fabricated by single layer graphenes. One of the graphene layers is formed in the top panel as a disconnected graphene beam transferred on PDMS, and the other of the graphene layer is formed with line-patterning on the bottom panel of triple structure PET/PI/SiO2. The touch sensor shows characteristics of flexible. Its transmittance is approximately 75% where transmittance of the top panel and the bottom panel are 86.3% and 87%, respectively, at 550 nm wavelength. Sheet resistance of each graphene layer is estimated as low as $971{\Omega}/sq$. The results show that the conductance change rate (${\Delta}C/C0$) is $8{\times}105$ which depicts ultra-high sensitivity. Moreover, reliability characteristic confirms consistent behavior up to a 100-cycle test.

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Development of Technology for Double Covering Two Way Complex Yarn Products(I) -Dry Heat Shrinkage and Bending Properties of the Two Way Fabric Woven by Spandex-Core/Nylon-Covering Complex Yarn- (Double Covering Two Way 이질 복합사 제품개발(I) -스판덱스-코어/나일론-커버링 two way 복합사 직물의 건열수축 및 굽힘 특성)

  • 이춘길
    • Proceedings of the Korean Fiber Society Conference
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    • 2002.04a
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    • pp.388-391
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    • 2002
  • 의류용 소재의 다양화와 소재의 복합화에 따라 최근 여러 가지의 합성섬유 관련소재가 선을 보이고 있다. 그 중 double covering two way 이질 복합사 제품은 high touch 및 fashion 용 차별용도의 최적소재를 도출하여 기존의 제품과는 차별화 할 수 있다는 점과, 기존 제품과는 그 물성이 전혀 다른 새로운 소재의 제품을 생산함에 따라 품질 고급화에 크게 기여할 수 있다는 점에서 그 중요성을 가지고 있다. (중략)

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An alternative method for smartphone input using AR markers

  • Kang, Yuna;Han, Soonhung
    • Journal of Computational Design and Engineering
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    • v.1 no.3
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    • pp.153-160
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    • 2014
  • As smartphones came into wide use recently, it has become increasingly popular not only among young people, but among middle-aged people as well. Most smartphones adopt capacitive full touch screen, so touch commands are made by fingers unlike the PDAs in the past that use touch pens. In this case, a significant portion of the smartphone's screen is blocked by the finger so it is impossible to see the screens around the finger touching the screen; this causes difficulties in making precise inputs. To solve this problem, this research proposes a method of using simple AR markers to improve the interface of smartphones. A marker is placed in front of the smartphone camera. Then, the camera image of the marker is analyzed to determine the position of the marker as the position of the mouse cursor. This method can enable click, double-click, drag-and-drop used in PCs as well as touch, slide, long-touch-input in smartphones. Through this research, smartphone inputs can be made more precise and simple, and show the possibility of the application of a new concept of smartphone interface.

Using Neural Networks to Predict the Sense of Touch of Polyurethane Coated Fabrics (신경망이론은 이용한 폴리우레탄 코팅포 촉감의 예측)

  • 이정순;신혜원
    • Journal of the Korean Society of Clothing and Textiles
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    • v.26 no.1
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    • pp.152-159
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    • 2002
  • Neural networks are used to predict the sense of touch of polyurethane coated fabrics. In this study, we used the multi layer perceptron (MLP) neural networks in Neural Connection. The learning algorithm for neural networks is back-propagation algorithm. We used 29 polyurethane coated fabrics to train the neural networks and 4 samples to test the neural networks. Input variables are 17 mechanical properties measured with KES-FB system, and output variable is the sense of touch of polyurethane coated fabrics. The influence of MLF function, the number of hidden layers, and the number of hidden nodes on the prediction accuracy is investigated. The results were as follows: MLP function, the number of hidden layer and the number of hidden nodes have some influence on the prediction accuracy. In this work, tangent function, the architecture of the double hidden layers and the 24-12-hidden nodes has the best prediction accuracy with the lowest RMS error. Using the neural networks to predict the sense of touch of polyurethane coated fabrics has hotter prediction accuracy than regression approach used in our previous study.

Improvement of Smartphone Interface Using AR Marker (AR 마커를 이용한 스마트폰 인터페이스의 개선)

  • Kang, Yun-A;Han, Soon-Hung
    • Korean Journal of Computational Design and Engineering
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    • v.16 no.5
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    • pp.361-369
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    • 2011
  • As smartphones came into wide use recently, it has become increasingly popular not only among young people, but middle-aged people as well. Most smartphones use capacitive full touch screen, so touch commands are made by fingers unlike the PDAs in the past that use touch pens. In this case, a significant portion of the smartphone's screen is blocked by the finger so it is impossible to see the screens around the finger touching the screen, and difficulty occurs in precise control used for small buttons such as qwerty keyboard. To solve this problem, this research proposes a method of using simple AR markers to improve the interface of smartphones. Sticker-form marker is attached to fingernails and placed in front of the smartphone camera Then, the camera image of the marker is analyzed to determine the orientation of the marker to perceive as onRelease() or onPress() of the mouse depending on the marker's angle of rotation, and use its position as the position of the mouse cursor. This method can enable click, double-click, drag-and-drop used in PCs as well as touch, slide, long-touch-input in smartphones. Through this research, smartphone inputs can be made more precise and simple, and show the possibility of the application of a new concept of smartphone interface.

Robust Design of Descending Lifeline Using Double Square Linkage Mechanism (이중 4절링크 기구를 이용한 완강기 강건 설계)

  • Park, Jung-Woo;Yun, Seul-Gi;Jung, Geun-Hak;Jung, Min-Hee;Kim, Sang-Hyun
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.20 no.6
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    • pp.108-113
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    • 2021
  • Recently, a new concept of a one-touch descending lifeline has been proposed to address the drawbacks of the conventional descending lifeline, which can be easily installed and quickly evacuated in the case of a fire emergency. All separate parts for escape are initially mounted in a box, and the link-type support is spread out of the window by pushing the handle attached to the box. In this study, the proposed double square linkage mechanism was redesigned, and its safety is verified by determining an appropriate moment of inertia of the link through finite element analysis using Abaqus. The shape and assembling method of the reel and speed controller were also modified such that the safety belt was simultaneously unfolded with link-type support. Finally, the feasibility of the proposed one-touch all-in-one descending lifeline was confirmed through fabrication.

Design for Position Protection Secure Keypads based on Double-Touch using Grouping in the Fintech (핀테크 환경에서 그룹핑을 이용한 이중 터치 기반의 위치 차단이 가능한 보안 키패드 설계)

  • Mun, Hyung-Jin
    • Journal of Convergence for Information Technology
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    • v.12 no.3
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    • pp.38-45
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    • 2022
  • Due to the development of fintech technology, financial transactions using smart phones are being activated. The password for user authentication during financial transactions is entered through the virtual keypad displayed on the screen of the smart phone. When the password is entered, the attacker can find out the password by capturing it with a high-resolution camera or spying over the shoulder. A virtual keypad with security applied to prevent such an attack is difficult to input on a small touch-screen, and there is still a vulnerability in peeping attacks. In this paper, the entire keypad is divided into several groups and displayed on a small screen, touching the group to which the character to be input belongs, and then touching the corresponding character within the group. The proposed method selects the group to which the character to be input belongs, and displays the keypad in the group on a small screen with no more than 10 keypads, so that the size of the keypad can be enlarged more than twice compared to the existing method, and the location is randomly placed, hence location of the touch attacks can be blocked.