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이영섭(Young-Sup Lee),김동일(Dong-Il Kim),강민수(Minsu Kang) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.12
A touch panel system has been one of the most widely used input devices. In this study, a touch panel embedded system using accelerometers is considered in order to make commercial white-boards or plates into touch panels. Three accelerometers are located at different positions on such a white board, so that touch points on the board can be identified using the sensors. For the identification of touch points, a TDOA (Time Difference of Arrivals) technique is applied in the algorithm which was implemented in a DSP board (TI 6713 DSK), which can provide a precise touch location by using the cross-correlation function of measured signals from the three accelerometers. Experiment results show that the touch panel system with accelerometers could provide the exact touch location. Thus a novel approach using such accelerometers could be applied to a new touch panel system.
Advancements in Capacitive Touch System and Stylus Technologies
( Ha-min Lee ),( Seung-hoon Ko ) 한국전기전자재료학회 2024 전기전자재료학회논문지 Vol.37 No.5
Due to changes in the form factor of display panels and touch screen panels in various devices, capacitive touch systems have evolved to address various issues such as low power consumption, noise immunity, and small chip size. Furthermore, some devices have applications that use a stylus. Since the stylus operates similarly to a finger touch, it encounters similar issues. Recent research trends focus on addressing key issues such as noise, which is primarily caused by the self-capacitor formed between the display cathode and the touch screen panel. In this paper, Various research papers discussing methods to eliminate external noise will be reviewed. These advancements enhance noise immunity in touch systems, making it easier to use thinner and more flexible panels. These progress make touch technology more versatile and reliable in various applications.
Oligomer 특성에 따른 Touch Panel용 UV 경화형 Ag paste의 물성연구
남수용 ( Su Yong Nam ),구용환 ( Yong Hwan Koo ),김성빈 ( Sung Bin Kim ) 한국화상학회 2010 한국화상학회지 Vol.16 No.3
The recent spotlight on electronic touch-screen display, a rapid breakthrough in the information society is evolving. Touch panel input device such as a keyboard or mouse without the use of, the on-screen character or a specific location or object on the person`s hand touches a particular feature to identify the location of a panel is to be handled. The touch screen on the touch panel is used in the Ag paste is used mostly for low-curable paste. The thermal-curing paste according to the drying process of thermal energy consumption and improve the working environment of organic solvents have problems. In this study, Ag paste used in the non-thermal curing friendly and cost-effective UV curable paste was prepared. Current commercially available thermal-curable binder, was used instead of the flow characteristics of UV-curable oligomers and monomers with functional groups to give a single conductive Ag paste with the addition of a pattern could be formed. Ag paste as a result, thermal-curing adhesive, hardness, resistance and excellent reproduction of fine patterns and was available with screen printing environmentally friendly could see its potential as a patterning technology.
MIL-HDBK-217F와 Telcordia SR-332를 이용한 Touch-Machine Control Panel의 신뢰도 예측 사례 연구
이국진,김상부,박우재,오극기,박진환,이동건,Lee, Guk Jin,Kim, Sang Boo,Park, Woo Jae,Oh, Keuk Ki,Park, Jin Whan,Lee, Dong Geon 한국시스템엔지니어링학회 2016 시스템엔지니어링학술지 Vol.12 No.2
Machine switch type control panel is widely used for machine tools in Korea. They, however, have some difficulties in identifying the current operating status of machine tools especially when exposed to cutting oil. And also they have quality problems of operating failures. A new capacitor touch type machine control panel is developed and its reliability is predicted. MIL-HDBK-217F and Teclordia SR-332 are used for its reliability prediction and the prediction results are compared.
광원을 내장한 펜의 출력광과 광 도파로의 광 결합을 이용하는 터치 패널 장치의 내부 광 결합 구조 설계
박대서,김대종,오범환,박세근,이일항,이승걸,Park, Dae-Seo,Kim, Dae-Jong,O, Beom-Hoan,Park, Se-Geun,Lee, El-Hang,Lee, Seung-Gol 한국광학회 2009 한국광학회지 Vol.20 No.2
본 연구에서는 광원을 내장하고 있는 포인팅 펜(pointing pen)의 출력광과 광 도파로 배열 사이의 광 결합을 이용하여 펜의 접촉여부와 접촉 위치를 검출하는 광학식 터치 패널 장치를 제안한다. 펜의 출력광과 광 도파로 배열 간의 광 결합을 최대화하고, 동시에 특정 광 도파로로 결합된 광속이 적은 손실로 전파할 수 있도록 하기 위해 광 도파로의 교차점 마다 부가적인 피라미드 구조를 삽입하였다. 광 도파로 단면의 크기가 $50{\times}50{\mu}m^2$인 경우 광선 추적법을 통해 결정된 피라미드의 최적 구조는 밑변의 폭, 높이, 경사각이 각각 $50{\mu}m$, $22.5{\mu}m$, $42^{\circ}$이었다. 이때 광 결합 효율은 97.8%이었으며, 전파손실은 평균적으로 0.3 dB/mm이었다. 그리고 펜의 기울어짐에 대한 허용 각도는 ${\pm}12^{\circ}$임을 확인하였다. In this paper, an optical touch panel device is newly proposed, with operating principle based on the optical coupling between a pointing pen having a built-in light source and perpendicularly crossed optical waveguide arrays. In order to enable an external light to couple into a waveguide core, the auxiliary pyramidal structures are introduced into all intersecting points located periodically along optical waveguides. The shape is optimized for minimizing the unwanted propagation loss due to the same structure by a ray tracing method. For the optical waveguide with the size of $50{\times}50{\mu}m^2$, the bottom width, height, and slope angle of the optimized pyramidal structure are $50{\mu}m$, $22.5{\mu}m$, and $42^{\circ}$, respectively. The optical coupling efficiency of about 97.8% and the average propagation loss of 0.3 dB/mm were achieved for the optimized touch panel. Finally, it is found from the tolerance analysis that tilting of the pen up to ${\pm}12^{\circ}$ can be allowed.
구수본(Soo-Bon Koo),이영훈(Young-Hun Lee) 한국정보기술학회 2010 Proceedings of KIIT Conference Vol.2010 No.-
On-cell type의 touch panel구조에서는 ITO film위 Ag paste를 이용한 screen print기술이 Bus bar전극형성의 일반적인 공정이다. 정전용량 touch panel의 수요증가 및 slim한 디자인 추세에 따라 Bezel폭 축소가 필수적이며, 이에 따라 Bus bar전극 또한 고집적화 기술의 개발이 필요하다. 이에 따라 본 논문에서는 금속박막 증착과 photo lithography공정을 이용한 bus bar전극형성 process를 설계하였다. 다양한 다층박막구조에 공정을 적용하여 ITO film과의 접착력 및 저 저항, 그리고 최소선폭에 대한 비교를 진행하였다. 최종 선택된 Mo/Al/Mo박막구조를 이용한 Bus bar전극의 저항 및 선폭측정결과 line저항(100), 최소선폭(10um)으로 fine pitch bus bar전극형성 공정에 적합한 것으로 확인되었다. In on-cell type touch panel structure, screen printing technology which uses Ag paste on ITO film is one of the general processes for Bus bar formation. Considering the growing of capacitance touch panel industry and slim design trend, decreasing the Bezel width is necessary. The high technology should be developed for Bus bar printing. Thus, Bus bar formation process was designed by metal deposition and photo lithography in this theory. By applying multiple layers structure process, the comparisons of adhesion strength between ITO films, resistances and pitch width were proceeded. Based on the comparisons, Mo/Al/Mo structure was known as the best for fine pitch bus bar formation process.
비정질 실리콘 광센서를 이용한 터치 감응 디스플레이 설계 및 제작
이수연(Soo-Yeon Lee),박현상(Hyun-Sang Park),한민구(Min-Koo Han) 대한전기학회 2009 전기학회논문지 Vol.58 No.11
A new touch-sensitive hydrogenated amorphous silicon(a-Si:H) display with embedded optical sensor arrays is presented. The touch-sensitive panel operation was successfully demonstrated on a prototype of 16-in. active-matrix liquid crystal display (AMLCD). The proposed system provides the finger touched point without the real-time image processing of information of the captured images. Due to the simple architecture of the system, we expect the introduction of large-area touch-sensitive display panels.
High Temperature Reliability Study of Anisotropic Conductive Adhesive for Electronic Components
Woo, Eun-Ju,Moon, Yu-Sung,Kim, Jung-Won Institute of Korean Electrical and Electronics Eng 2018 전기전자학회논문지 Vol.22 No.1
In this study, we investigated the reliability of anisotropic conductive paste (ACP) and anisotropic conductive films (ACF), which are anisotropic conductive adhesives, applied to automotive touch panels. Adhesive material is also important as a key factor in assembling the touch panel. In order to measure the resistance change of the parts in two kinds of high temperature test, the reliability of the two types of anisotropic conductive adhesives was compared and evaluated through the results of the resistance change. For 615 hours of reliability testing, the anisotropic conductive film exhibited a higher stability in a high temperature environment than the anisotropic conductive paste.
High Temperature Reliability Study of Anisotropic Conductive Adhesive for Electronic Components
우은주,문유성,김중원 한국전기전자학회 2018 전기전자학회논문지 Vol.22 No.1
In this study, we investigated the reliability of anisotropic conductive paste (ACP) and anisotropic conductive films (ACF), which are anisotropic conductive adhesives, applied to automotive touch panels. Adhesive material is also important as a key factor in assembling the touch panel. In order to measure the resistance change of the parts in two kinds of high temperature test, the reliability of the two types of anisotropic conductive adhesives was compared and evaluated through the results of the resistance change. For 615 hours of reliability testing, the anisotropic conductive film exhibited a higher stability in a high temperature environment than the anisotropic conductive paste.