http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
단일갭 반투과 FFS 액정 디스플레이를 위한 최적 화소 디자인
정연학,임영진,정은,이승희,Jeong, Youn-Hak,Lim, Young-Jin,Jeong, Eun,Lee, Seung-Hee 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.12
When a dielectric layer, in-cell retarder (ICR) is formed between electrode and LC layer to get a single gap transflective fringe-field switching (FFS) display, the operating voltage ($V_{op}$) is highly increased due to the thickness of dielectric material. But, we also knew the phenomenon that the increasing rate of Vop is different whether the 1st common electrode was composed of plate type or slit type. In this paper, the common electrode in transmissive part was composed of slit type which had less steepness effect of the Vop and in reflective part was composed of plate type. The rubbing angle of reflective part can be adjusted properly to match the voltage dependent transmittance and reflectance.
폴리이미드 표면에서의 네마틱 액정의 틸트 제어를 이용한 High Tilted OCB(HTOCB) 모드
황정연,정연학,서대식,Hwang, Jeoung-Yeon,Jeong, Youn-Hak,Seo, Dae-Shik 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.7
In this paper, we have improved a novel high tilted optically compensated bend (OCB) (HTOCB) mode by using high tilt angle that was generated by the unique baking condition on the homeotropic alignment layer. The high tilt angle of liquid crystal (LC) was generated by new alignment process that tilt angle changed homeotropic state to homeogenous state using Hot-plate equipment; we obtained about $40\~50^{\circ}$ tilt angle with negative and positive dielectric anisotropy on the homeotropic polyimide (PI), and then LC tilt angle decreased as increasing baking temperature and time. At last, we obtained about $10^{\circ}$ with positive type NLC $({\Delta}n>0)$. Also, the LC tilt angle of positive type NLC $({\Delta}n>0)$ decreased as increasing rubbing strength at the same baking temperature and time. The novel LC operating mode (HTOCB) that used the high tilt angle by the new alignment method was improved. The response time of the novel HTOCB cell was faster than that of conventional OCB cell. We suggest that the developed the novel HTOCB cell using control of tilt angle on the homeotropic surface is a promising technique for the achievement of a fast response time and a high contrast ratio.
이정균(Jeong Kyun Rhee),채권묵(Kwon Mook Chae),정연학(Youn Hak Jeong),문태일(Tai Il Moon) 대한소화기학회 1989 대한소화기학회지 Vol.21 No.3
N/A A total of 17 cases of bezoars who were admitted and treated with operation at the department of general surgery, Won Kwang University Hospital for 6 years from 1982 to 1987 were clinically analysed. The results were follows; 1) All cases (17 cases) were phytobozoars, especially diospyrobezoars in 14 cases (82.4%) 2) The bezoars were predominant in autumm and winter (88.2%). 3) The bezoars were located in stomach and jejunum, 2 cases (11.8%); duodenum, 1 case (5.9%); jejunum, 4 cases (23.5%); ileum, 10 cases (58.8%). 4) The mechanical intestinal obstruction was noted in 17 cases (100.0%) and a palpable mass in 3 cases (17.6%). 5) Enterolithotomy was performed in 14 cases (82.4%).
무기 박막을 이용한 이온빔 배향 FFS 셀의 전기광학특성에 관한 연구
황정연,박창준,정연학,김경찬,안한진,백홍구,서대식,Hwang, Jeoung-Yeon,Park, Chang-Joon,Jeong, Youn-Hak,Kim, Kyung-Chan,Ahn, Han-Jin,Baik, Hong-Koo,Seo, Dae-Shik 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.10
In this paper, we intend to make fringe-field switching (FFS) mode cell by the ion beam (IB) alignment method on the a-C:H thin film, to analyze electro-optical characteristics in this cell. We studied on the suitable inorganic thin film for fringe-field switching (FFS) cell and the aligning capabilities of nematic liquid crystal (NLC) using the alignment material of a-C:H thin film as working gas at 30 W rf bias condition. A high pretilt angle of about 5 $^{\circ}C$ by ion beam (IB) exposure on the a-C:H thin film surface was measured. Consequently, the high pretilt angle and the good thermal stability of LC alignment by the IB alignment method on the a-C:H thin film surface as working gas at 30 W rf bias condition can be achieved. An excellent voltage-transmittance (V -T) and response time curve of the IE-aligned FFS-LCD was observed with oblique IB exposure on the a-C:H thin films. Also, AC V-T hysteresis characteristics of the IB-aligned FFS-LCD with IE exposure on the a-C:H thin films is almost the same as that of the rubbing-aligned FFS cell on a polyimide (PI) surface.