• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.222-225
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• 2006

A custom-made display driver for an electronic paper is presented, which has high-voltage multilevel output capability and extremely low power consumption. An original level-shifter circuit can effectively reduce the power consumption and the chip area. This driver was implemented to a Quick-Response Liquid Powder Display (QR-LPD) and the image quality and power consumption was estimated.

• Transactions of The Korea Fluid Power Systems Society
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• v.1 no.4
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• pp.15-21
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• 2004

High speed on-off electro-magnetic valves have been used for pressure control or flow control in automotive or construction machine servomechanisms. These systems require quicker valve switching speed to improve control preciseness. The authors designed and manufactured an electric valve driver with quick response characteristics by using 3 power source type valve driver concept. In experiments by using a hydraulic system incorporating the new valve driver, the new driver shortened the switching lag time from 5 ms to 1.3 ms. And also the new driver showed excellent position tracking control performances.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.845-849
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• 2005

Quick-Response Liquid Powder Display ($QR-LPD^{(R)}$) is a promising device for ultra-low-power applications. Several driving methods for this display were investigated in terms of image quality and power consumption. The power consumed both in a panel and in the output circuits of driver LSIs was evaluated by analog circuit simulation and discussed.

• Journal of the Ergonomics Society of Korea
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• v.28 no.2
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• pp.57-67
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• 2009

This study proposed a practical metaphor development process that consisted of three steps: 1) identifying major functions, 2) developing metaphor candidates, and 3) evaluating appropriateness of the candidates. In the first step, a total of 27 functions might be implemented in a driver information system (DIS) in the near future. Then, three metaphor candidates were selected from existing metaphors, which were reported to be more practical than others by previous studies. Finally, the candidates were evaluated on their appropriateness for driver information systems by using a quick and simple survey. As a result, two metaphors (a PC and a secretary) were identified as the most appropriate ones. The two metaphors can be used to design a variety of interfaces and interactions for driver information systems. In addition, the development process proposed in this study could be applied to developing metaphors for emerging devices with a variety of functions (e.g. PMPs, MP3s, and electronic dictionaries) as well as driver information systems.

• Electronics and Telecommunications Trends
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• v.21 no.1 s.97
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• pp.44-56
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• 2006

임베디드 소프트웨어(embedded software)에서 디바이스 드라이버(device driver)는 하드웨어와 운영체제 및 응용 프로그램 사이의 연결고리 역할을 하는 핵심 구성 요소로서, 응용 프로그램이 하드웨어에서 제공하는 기능을 사용할 수 있도록 제어 및 상호동작을 위한 일관된 인터페이스를 제공하는 소프트웨어이다. 이러한 디바이스 드라이버는 하드웨어와 소프트웨어의 양쪽 측면에 모두 관련이 있어서 개발이 어렵기 때문에 개발을 지원하는 도구가 필요하다. 본 원고에서는 디바이스 드라이버 개발 도구가 갖추어야 할 기능을 크게 소스 코드 자동생성 기능, 테스팅 기능, 정형 검증 기능, 통합 개발 환경 및 개발 편의 유틸리티 기능으로 나누어서 각각의 기술에 대해서 살펴보고, 현재 상용 제품들을 살펴보았다. 그리고, ETRI의 본 연구팀에서 개발한 디바이스 드라이버 통합 개발 도구인 “QuickDriver”를 기술하고, 이 도구와 상용 제품과의 비교를 수행하였다.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.1163-1164
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• 2008

From the complexities and functional/operational expectations, the compositions of PC devices requires Device Drivers to deliver full performance of the Hardware. However, due to quick transition of hardwares and expectations of better performance of the system. As a rest users are exposed of unexpected failures of device drivers which will cause malfunction of the system which consequently cause damages in quantity as well as quality wise. In this paper, the method of calculation and/or forecast to unexpected failure will be suggested. It may not be the answer but can be a guide to calculation to economic damage due to device driver failure.

• Journal of Institute of Control, Robotics and Systems
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• v.7 no.4
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• pp.288-294
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• 2001

In this study, a new PWM method considering the actuation delay of high speed solenoid valves is proposed to improve the response characteristics of electro hydraulic servo systems controlled by high speed solenoid valves. In addition, the decision method for the system gain, the basic period of PWM, and the sampling time is proposed, Since the conventional system controlled by high speed solenoid valves is too slow to apply this method, a high speed driving circuit(Quick-Drive) which enables rapid switching of the high speed solenoid valve at a high speed sampling mode is applied to realize this method. The experimental result shows that it is possible to achieve precision and quiet control without occurrence of limit cycle and wide range dead band.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.8
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• pp.718-724
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• 2013

In today's automotive industry, there exist several systems that help drivers reduce the possibility of accidents, such as the ADAS (Advanced Driver Assistance System). The ADAS helps drivers make correct and quick decisions during dangerous situations. This study analyzed the performance of the IMM (Interacting Multiple Model) method based on multiple Kalman filters using the data acquired from a driving simulator. An IMM algorithm is developed to identify the current discrete state of neighboring vehicles using the sensor data and the vehicle dynamics. In particular, the driving modes of the neighboring vehicles are classified by the cruising and maneuvering modes, and the transition between the states is modeled using a Markovian switching coefficient. The performance of the IMM algorithm is analyzed through realistic simulations where a target vehicle executes sudden lane change or acceleration maneuver.

• Journal of the Korean Society of Hazard Mitigation
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• v.5 no.3 s.18
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• pp.41-46
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• 2005

Establishing special fire flower sensor of automatic fire equipment in tunnel, it is informed perception, croaker suppression realization and danger occurrence item vehicles driver of tunnel entry verge and connection stream tube institution early stage. which must do to cope immediately. In this paper, quick disposal decides to examine about dictionary perception system that is possible method.

• Journal of Korean Society of Transportation
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• v.27 no.2
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• pp.95-105
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• 2009

Traffic accidents on highways are likely to happen when there is an imbalance in the complex relationships among key elements such as road geometries, driver related factors, and mechanical performances. The Demand-Effort Model (DEM), which evaluates highway safety, can be explained by the imbalance, which occurs when the level of demand of the driver's attention to the road environment exceeds that of the response from the driver. This study suggests a new model that improves the reliability of the current DEM through the reinterpretation on the physiological signals with the help of the Neural Network Model (NNM). The data were collected from 149 subjects, who drove a test vehicle on the Yongdong, Honam, and Seohaean Expressways in Korea. Three important results could be drawn from the recursive tests as follows; (1) Only 5 out of 10 parameters on the physiological signals which are currently used were proven to be meaningful through the Normality Test, Cluster Analysis, and Mann-Whitney Analysis. (2) The revised DEM, which internally uses the NNM, showed more reliable results than existing DEM. Group 1, which is based on the new DEM showed 80.0% of accuracy in measuring the level of driver's efforts, however, that of Group 2 based on the current DEM was 74.3%. (3) Field tests on the Honam Expressway showed lower 'type II error' with the new DEM (40.5%) than the old DEM (58.8%). The DEM is designed as a quick and easy way to determine highway safety prior to the minute road safety audit (RSA) by a professional audit team. Then a new DEM, which is based on the NNM, needs to be considered since it showed higher reliability and lower error.