• 제어로봇시스템학회논문지
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• 제9권8호
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• pp.592-599
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• 2003

As one of the Principal modalities of human sensation, tactile feel is prerequisite for building wide variety of applications such as telemanipulation, virtual reality and medical engineering. A dynamic Braille display device based on a polymer actuator is presented. The actuator, often called artificial muscle actuator has advantageous features over the existing methods in terms of intrinsic softness, ease of fabrication, cost-effectiveness and miniaturization. The principles of actuation with dielectric elastomer is introduced, and necessary considerations on the design of a tactile display device are discussed. The design of the device is described in detail including the fabrication process and driving electronics. Also, preliminary results of experiments are given to evaluate its performance.

• 한국의학물리학회지:의학물리
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• 제17권2호
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• pp.77-82
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• 2006

영상의 표시는 PACS 및 디지털 의료 영상계에서 중요한 요소이다. 동일한 디지털 데이터에 대한 영상의 질은 디스플레이 장치의 물리적 특성, 최적화된 설정 및 교정, 주위 불빛 조건 등에 의하여 영향을 받는다. 디스플레이 장치는 사용시간에 따라서 휘도 감소 및 설정값들의 변화에 의하여 성능이 저하된다. 디스플레이 시스템의 성능이 지속적으로 저하되기 때문에 일정한 주기마다. 정도관리를 수행하여야한다. 정도관리 효과를 평가하기 위하여 진단에 사용되는 10대의 평판 LCD 디스플레이 장치를 선택하였으며, 설정값 교정 전과 후에 휘도 반응, 휘도 공간 의존도, 분해능, 그리고 색도 변화를 정량적으로 측정하여 평가하였다. 정도관리 효과는 휘도 반응과 휘도 공간 의존도 테스트에서 다소 큰 변화가 있었으나 분해능 및 디스플레이 색도에서의 영향은 크지 않았다. 디스플레이 장치의 주기적인 정도관리는 의료영상을 일관성 있게 표시하기 위하여 필수적이다. 본 연구 결과는 의료용 디스플레이 장치의 정도관리에 대한 항목 선정 및 주기를 결정하는 데 중요한 역할을 할 수 있을 것이다.

• 반도체디스플레이기술학회지
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• 제12권2호
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• pp.73-78
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• 2013

This paper proposes a portable electrocardiograph and smart device-based heart health monitoring and risk notification system. The proposed system consists of a portable electrocardiograph and a smart device for a system user, and a web-based monitoring system for observers. This system can improve the convenience and efficiency of measurement by using a light-weight portable electrocardiograph and a smart device. In addition, any authorized person such as caregiver or family member who is not related to medical institution can monitor users'heart health in real-time using the web-based monitoring system. Therefore, a user and authorized remote observers can efficiently monitor and manage user's heart health in daily-life even without any medical institution's help, and can preemptively deal with any possible dangerous situations, such as degeneration of a cardiac disorder and sudden cardiac death.

• 반도체디스플레이기술학회지
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• 제11권3호
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• pp.51-56
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• 2012

In this paper, we propose a telemedicine system based ECG data using a bio-signal meter and a smart device for treating faraway patients. This system is composed of a patch-shaped portable bio-signal meter, patient's smart device application, and doctor's PC software. Using these components, doctors and patients can do telemedicine. First, a patient measures his own ECG signal with a bio-signal meter and send the data to a doctor using a smart device application. Then, the doctor checks the ECG data, and make and send a diagnosis chart to web server. Likewise, doctors and patients can be offered a medical environment without time and space restraints. Applying this system to real medical system can improve the problem of low accessibility and efficiency and also can reduce medical expenses.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2006년도 제33회 추계학술대회 발표논문집
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• pp.46-46
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• 2006

• 전자공학회논문지SC
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• 제41권6호
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• pp.1-10
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• 2004

본 논문에서는 가상 구멍뚫기 작업의 표현을 위한 햅틱 렌더링 시스템을 제안하였다. 가상 모델을 만들기 위하여 영상 처리기법과 Delaunay 삼각형을 이용하였고, 실시간 어플리케이션에 적용하기 위해 간단하면서도 효율적인 후크의 법칙을 이용하여 힘을 생성하였다. 또한, 직렬형 메커니즘으로 표현하기 어려운 큰 힘을 표현하면서, 병렬형 메커니즘의 특이점 문제를 함께 해결하기 위하여 여유구동 6자유도 병렬형 메커니즘을 햅틱장치로 제안하였고 두 종류의 구멍뚫기 실험을 통하여 큰 힘을 표현할 수 있는 능력을 검증하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.1062-1065
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• 2004

The importance of display is becoming increasingly important due to the development of information and industry where it leads to diverse and abundant information in today's society. The demand and application range for FPD(Flat Panel Display), specifically represented by LCD(Liquid Crystal Display) and PDP(Plasma Display Panel), have been rapidly growing for its outstanding performance and convenience amongst many other forms of display. The current focus has been on OLED(Organic Light Emitting Diode) in the mobile form, which has just entered into mass production amid the different types of FPD. Many studies are being conducted in regards to device, vacuum evaporation, encapsulation, and drive circuits with the development of device as a matter of the utmost concern. This study develops a new type of light-emitting materials by synthesizing medical polymer organic chitosan and phosphor material CuS. Chitosan itself satisfies the Pool-Frenkel Effect, an I-V specific curve, with a thin film under $20{mu}m$, and demonstrates production possibility for a living body sensors solely with the thin film. Furthermore, it enables production possibility for EML of organic EL device(Emitting Layer) with liquid Green light emitting and Blue light emitting as a result of synthesis with phosphor material.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2006년도 하계종합학술발표회 논문 초록집
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• pp.436-436
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• 2006

• 반도체디스플레이기술학회지
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• 제22권4호
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• pp.87-92
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• 2023

As the elderly population increases, the number of patients with various joint diseases, including degenerative arthritis, is steadily increasing. CPM medical devices are needed to effectively treat degenerative arthritis that is common in the elderly population. Domestic CPM medical devices have limited functions and are highly dependent on imports for expensive imported medical devices. To solve this problem, we designed a ROM measurement function using a current sensor that is not present in existing composite joint CPM medical devices. The algorithm was designed using the fact that the force caused by joint stiffness greatly increases the current flowing through the DC motor. In addition, the need for digital healthcare in the medical field is gradually expanding as the proportion of chronically ill patients increases due to the spread of the non-face-to-face economy due to COVID-19 and the aging population. Therefore, this paper aims to improve the performance of CPM medical devices by allowing real-time confirmation of rehabilitation exercise information and operation range measurement results in accordance with digital healthcare trends through a Bluetooth application developed as an Android studio.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1158-1159
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• 2009

Tri-stimulus values of CIE-XYZ and RGB values obtained by photographic film, CCD camera or scanner depend on the spectral sensitivity of imaging devices and the spectral radiant distribution of the illumination. It is important to record and reproduce the reflectance spectra of the object for true device independent color reproduction and high accurate recording of the scene. In this paper, a method to record the reflection spectra of the object is introduced and its application to spectral endoscopes is presented.