• Title/Summary/Keyword: Control and Display

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The Control of Electrostatic Characteristics in Toner Type Paper-like Display

  • Lee, Sung-Guk;Kwon, Soon-Hyung;Cho, Won-Ki;Song, Moon-Bong;Kim, Young-Woon
    • Journal of Information Display
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    • v.8 no.1
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    • pp.14-17
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    • 2007
  • The toner type paper-like display (PLD) has been developed with two polymer particles having opposite polarity composed of polymer, colorant and external additives (nano-sized silica). Nano-sized silica with triboelectric charge was used for the charge control agent (CCA) and influenced on the electrostatic properties of the silica-coated polymer particles. The surface morphology and the cohesiveness of silica-coated polymer particles were changed with the silica coating time. From these results, it was verified that the PLD cell using silica-coated particles (200 seconds) shows a good white appearance and low driving voltage.

Development of Narrow Viewing Angle Mode TFT LCD and Application of Advanced Gray Compensation(GC) Algorithm

  • Kim, S.H.;Lee, K.J.;Jung, Y.C.;Lee, D.G.;Baek, J.S.;Ahn, B.C.;Choi, H.C.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1383-1385
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    • 2008
  • In the viewing-angle image control (VIC) technology, one pixel is made up of a quad pixel structure which is consisting of R, G, B, and electrically control briefringence (ECB) sub-pixels. Two types of test stimuli were used; text & complex image respectively. The limitations of those methods were found from the experiment. From the results the advanced GC technology was proposed.

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Ergonomic Considerations for the Design of a CRT-based Process Control System (CRT 방식 생산공정 제어용 계장시스템 설비의 인간공학적 고찰)

  • Chung, Min-Keun;Choi, Jae-Hyun;Jung, Eui-Seung
    • Journal of Korean Institute of Industrial Engineers
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    • v.16 no.2
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    • pp.11-21
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    • 1990
  • With a general trend toward larger and more complex systems with centralized control, an operator's role of supervisory decision making in the control room becomes more important. Identification of potential man-machine interface (MMI) problems with CRT-based process control systems was attempted using a structured questionnaire survey. Based on the survey results, a laboratory experiment was carried out to investigate the performance of alarm detection on a process control CRT display. The user performance was measured in terms of reaction time from the onset of an alarm sound until the completion of predefined response procedures. The results revealed that for a highly complex tasks, mean reaction time (RT¯) with a color consistent display was 10.5% faster than that with the original display, and RT¯ with a grouped display was reduced by 8.2% in comparison with the color consistent display.

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The Evaluation Method for Viewing Angle Image Control (VIC) Technology

  • Kwon, Jung-Bum;Park, Seung-Chul;Le, Don-Gyou;Lee, Lim-Soo;Ahn, Byung-Chul
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.700-702
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    • 2008
  • A new evaluation method which named 'Security Viewing Angle Factor (SVAF)' was suggested for VIC (Viewing-angle Image Control) technology to quantify a visual hiding performance of LCD. Currently, Contrast Ration (CR) is the general method to evaluate VIC technology. However, CR shows a significant difference when compared with the result of human visual system. Furthermore, a perceptional evaluation method and its conditions were established.

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Low Power Consumption Technology for Mobile Display

  • Lee, Joo-Hyung
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.402-403
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    • 2009
  • A variety of power reduction technologies is introduced and the benefits of the technologies are discussed. PenTile(R) DBLC (Dynamic Brightness LED Control) combined with SABC (Sensor-Based Adaptive Brightness Control) enables to achieve the average LED power consumption to one third. The panel power reduction of 25% can be achieved with low power driving technology, ALS (Active Level Shifter). MIP (Memory In Pixel) is expected to be useful in transflective display because the whole display area can be utilized in reflective mode with power consumption of 1mW.

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Tactile Transfer and Display Method using Data Glove and Vibration Motors Module (데이터 글로브와 진동모터를 이용한 촉각전달 및 제시 방법)

  • Kang, Hyung-Gu;Choi, Youngjin
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.12
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    • pp.1138-1144
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    • 2013
  • This paper proposes a tactile transfer and display method between a data glove and vibration motors module. The data glove is developed to capture the hand postures and to measure the grip forces. The measured data are simplified with the proposed 5-bit transfer and display algorithm, and the vibration motors module is developed to display the measured hand posture and grip force to the operator. The proposed 5-bit algorithm contains both an 8-step hand posture and 4-step grip force level information for tactile transfer to the vibration motors module. Also, the effectiveness of the proposed method is shown through several experiments.

Improvement of Railway Signaling System for KTX and Conventional Trains Operated on a Five-Display Signal System Under a Four-Display Signaling System (4현시 철도신호체계에서 KTX 및 일반열차의 5현시 신호체계 운행을 위한 시스템 개선방안)

  • Lee, See-bin;Lyou, Joon
    • Journal of Institute of Control, Robotics and Systems
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    • v.22 no.2
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    • pp.162-169
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    • 2016
  • Gyeong-bu railway line in Korea between Seoul and Cheon-an was built as two double tracks. A four-display signaling system, only for the metro line, was installed on the second double track so KTX and conventional trains can only operate on the first double track. This study suggests a method to allow KTX and conventional trains operated on the five-display signaling system to respond to accidents and track defects on the second double-track under the four-display signal system by means of problem analysis, calculation of breaking distances for KTX and conventional trains at each break mode, and improvement of the ATS system.

Ecological Interface Design for Air Traffic Control Display (항공기 관제 디스플레이의 생태학적 인터페이스 디자인에 관한 연구)

  • Ko, Seung-Moon;Myung, Ro-Hae
    • Journal of the Ergonomics Society of Korea
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    • v.25 no.4
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    • pp.103-113
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    • 2006
  • The purpose of this study was to evaluate an effect of the new air traffic control display designed by Ecological Interface Design [EID]. The methodology of EID has not been applied to the development of the air traffic control display so far. To design a new air traffic control display by EID, We implemented Work Domain Analysis about the air traffic control domain and made the Work Domain Model that consisted of the five levels of the Abstraction Hierarchy. We extracted the Information Requirement from the completed Work Domain Model and the extracted information requirements from the model were used to design the new air traffic control display. We evaluated an effect of the new air traffic control display designed by EID. Participants for evaluating consisted of 14 active military air traffic controller of the Republic of Korea Air Force. Experiment was designed two factors within subject. Factors manipulated in the experiment included displays type to compare the existing type with the new ecological interface type and included complexity to compare the effect of the high complex situation with the effect of the low complex situation. Response time about questions with relation to air traffic collision situation, accuracy, and subjective work load were measured. The results reveled that EID type's display has a significant effect on response time, accuracy, and subjective work load and verified that EID could be applied to the air traffic control domain that is more complex and dynamic.

The Control of Electrostatic Characteristics in Toner Type Paper-like Display

  • Lee, S.G.;Kwon, S.H.;Cho, W.K.;Song, M.B.;Kim, Y.W.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.1158-1161
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    • 2006
  • The toner type paper-like display (PLD) has been developed with two polymer particles having opposite polarity which is composed of polymer, colorant and external additives (nano-sized silica). Nano-sized silica with triboelectric charge was used for the charge control agent (CCA) and influenced on the electrostatic properties of the silica-coated polymer particles. The PLD cell using silica-coated particles (200 seconds) had shown a good white appearance and low driving voltage. The result could be explained in terms of the surface morphology and the cohesiveness depending on the silica coating time.

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Local Dimming Technique for High Dynamic Range LCD by White LED Backlight with New Control Algorithm

  • Huang, K.T.;Lee, Boris;Tsai, C.W.;Wu, C.C.;Cheng, C.F.;Chao, Andy;Yu, C.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.143-146
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    • 2008
  • Dynamic range of LCD panel can be dramatically improved by adaptive dimming technique. Adaptive control of LED backlight by input signal can reduce the light leakage of LCD panel and achieve high contrast ratio. An algorithm is proposed to distinguish the input signal and get proper luminance level. For lower cost of LCD panel, white light LED is used to accomplish 2D dimming and get better image performance of LCD.

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