LCD 모듈 조립라인의 자동화 공정 설계에 관한 연구

송춘삼(Chun-Sam Song),조웅(Woong Cho),유재명(Jae-Myung Yoo),김주현(Joo-Hyun Kim),김종형(Jong-Hyeong Kim) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.5

TFT-LCD process has two advantages as compared with the semiconductor-process. It is that cycle time is short and number of the final products are small. But it is complex and high labor costs in the TFT-LCD process. Also, the process is a must for building PICS (Production Information and Control System) which automated and intelligent. In this paper, automated process of LCD module assembly line that can increases productivity and reduce the cost to strengthen the competitiveness corresponding with global market is planned in comparison with its manual/semi-auto. The result of the paper, the productivity will be increased about 1.5 times and cut down labor costs of 85%. In addition, whole assembly line can be short and simple.

액정 세척용 수계 세정제의 배합성분과 혼합비에 따른 성능 변화

정재용(Jae Yong Jeong),이민재(Min Jae Lee),배재흠(Jae Heum Bae) 한국청정기술학회 2010 청정기술 Vol.16 No.2

LCD 모듈 조립라인의 자동화 공정 설계에 관한 연구

송춘삼(Chun-Sam Song),조웅(Woong Cho),유재명(Jae-Myung Yoo),김주현(Joo-Hyun Kim),김종형(Jong-Hyeong Kim) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-

TFT-LCD process has two advantages as compared with the semiconductor-process. It is that cycle time is short and number of the final products are small. But it is complex and high labor costs in the TFT-LCD process. Also, the process is a must for building PICS (Production Information and Control System) which automated and intelligent. In this paper, automated process of LCD module assembly line that can increases productivity and reduce the cost to strengthen the competitiveness corresponding with global market is planned in comparison with its manual/semi-auto. The result of the paper, the productivity will be increased about 1.5 times and cut down labor costs of 85%. In addition, whole assembly line can be short and simple.

LCD 모듈 조립라인의 공정 자동화 설계

송춘삼(Chun-Sam Song),김주현(Joo-Hyun Kim),김종형(Jong-Hyeong Kim) 한국생산제조학회 2007 한국생산제조학회지 Vol.16 No.5

TFT-LCD process has two advantages as compared with the semiconductor-process. It is that cycle time is short and number of the final products are small. But it needs complicated inspection / assembly line to be treated manually and much higher labor costs in the TFT-LCD process. Also, It is necessary to build PICS(Production Information and Control System) which is automated and intelligent. In this paper, an automated process of LCD module assembly line that can increase productivity and reduce the cost of production to strengthen the competitiveness corresponding with global market is planned in comparison with its manual / semi-auto. It is noted that The automated line for COG~FOG process replacing with the existing facilities had the following effects; the productivity is increased to about 1.5 times and labor cost reduced 85%. In addition, whole assembly line can be short and simple.

Notebook 用 LCD Module 내부의 온도 및 상대 습도 변화에 관한 실험적 연구

김태우(Tae Woo Kim),김기빈(Gi Bin Kim),이재원(Jae Won Lee) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5

Notebook 用 LCD Module 의 광학 시트(Optical Sheet) 변형에 기인한 시인성 품질 불량을 개선하기 위한 기초 연구의 일환으로 변형 유발의 요인인 열 및 습기의 영향을 분석할 수 있는 측정 시스템이 필요하였다. LCD Module 내부에는 0.5mm 미만의 미세한 Air Gap 이 존재하는데, 이 공간으로 외부의 습한 공기가 내부로 확산되는 것으로 추정된다. 이에 현상을 규명하기 위하여 초소형 온/습도 센서를 실장한 초박형 Sensor PCB 를 LCD Module 내부에 삽입하여 실시간으로 온/습도 변화를 측정 및 분석하였으며, 향후 변형 거동 Simulation 및 구조 설계 시 필요한 기초 데이터로 활용하고자 한다. As a part of basic research to improve the quality of screen, that becomes deteriorated when strain occurs within optical sheets in LCD modules for Laptop, the measurement system is needed to analyze the influence of heat and moisture, which are the factors causing the strain. It is assumed that existence of Air Gap less than 0.5mm inside the LCD module causes humid air from outside permeates through. To investigate this phenomenon, a thin PCB of compact sensors that measure temperature and humidity is inserted to LCD modules and therefore the change of temperature and humidity is analyzed in real time. The results can be used as a basic data for simulation of deformation behavior and structural design of LCD modules in the future.

LCD 유리기판 폴리싱 가공특성에 관한 연구

이상민(Sang-Min Lee),이충석(Choong-Seok Lee),채승수(Seung-Su Chae),김택수(Taeck-Su Kim),박휘근(Hwi-Keun Park),이종찬(Jong-Chan Lee) 한국기계가공학회 2009 한국기계가공학회지 Vol.8 No.1

This paper reports a kinematic analysis and experimental results for the polishing process of G7 LCD glass. A kinematic analysis for the relative motion of the upper plate and lower plate has been done and computer simulation has been programmed. A series of polishing experiments has also been carried out and compared with analytical data. The experimental results agreed well with analytical ones. The experimental results indicate that the polishing removal is proportional to the relative speed and pressure.

LCD Panel 결함 검사에 관한 연구

김종형(Jong Hyeong Kim),고국원(Kuk Won Ko) Korean Society for Precision Engineering 2007 한국정밀공학회지 Vol.24 No.4

액정표시장치용 백라이트의 반사형 편광판의 효율과 반사 필름의 반사 성격 사이의 상관성에 관한 연구

정승혜,박아르미,김수정,박두재,고재현 한국물리학회 2019 새물리 Vol.69 No.1

Technologies for reducing power consumption have become more important as the application area of displays continues to expand rapidly. Reflective polarizers play an important role in increasing the luminance of backlights for liquid crystal displays (LCDs), which are in the mainstream among various display technologies. The correlation between the efficiency of a multi-layer-type reflective polarizer and the reflecting property of a reflection film is studied by investigating the dependence of the luminance gain on the reflecting property of the reflection films adopted in the 15-inch backlight for notebook applications. Especially, the luminance gains caused by the reflective polarizer on either diffusing reflection films or specular reflection films were measured and compared, and showed that diffusing reflection is more favorable for enhancing the luminance gain of backlights. The present result suggests that the polarization recycling process occurs more efficiently as the reflection property of the reflection film becomes more diffusive. 디스플레이의 사용 영역이 빠르게 확장됨에 따라 디스플레이의 소비 전력을 줄이는 기술이 매우 중요해지고 있다. 현재 디스플레이 기술 중 가장 중요한 액정표시장치(liquid crystal display, LCD)용 백라이트에는 편광 재생을 담당하는 반사형 편광필름이 휘도 상승에 있어 중요한 역할을 담당한다. 본 연구에서는 15인치 노트북용 백라이트 내에 내장된 반사필름을 다양한 반사성격을 갖는 필름으로 바꿔가며 반사형 편광판에 의한 휘도 이득을 측정, 반사형 편광판의 효율과 반사 필름의 반사 성격 사이의 상관성에 대해 조사했다. 특히 비교적 난반사 성격이 강한 확산형 반사 필름과 거울 반사의 성격이 강한 금속 반사 필름의 휘도 이득을 정량적으로 측정하였다. 그 결과 금속 반사 필름을 사용한 백라이트에 비해 확산형 반사 필름을 사용한 백라이트의 휘도 이득이 더 높은 것을 확인할 수 있었다. 이러한 결과는 LCD의 휘도 향상을 목적으로 반사형 편광판을 추가하였을 때 확산 반사의 성격이 강할수록 반사형 편광판에 의한 편광 재생 (polarization recycling) 과정이 더 효율적으로 일어난다는 것을 의미한다.

대형 디지털TV Display 모듈의 내충격 설계를 위한 손상평가 연구

문성인,최재붕,김영진,서형원,이정권,구자춘 한국소음진동공학회 2004 한국소음진동공학회 논문집 Vol.14 No.10

Recently, specifications of flat display module is going to be higher definition, brightness and more wide viewing angle. On the other hand, physical thickness of those modules is forced to be slimmer and lighter. The flat display modules such as plasma or TFT-LCD employ thin crystallized panels that are normally weak to high level transient mechanical energy inputs. As a result, anti-shock performance is one of the most important design specifications of TFT-LCD modules. TFT-LCD module manufacturers and their customers like PC or TV makers perform a series of strict impact/drop test for the modules. However most of the large display module designs are generated based on engineer's own trial-error experiences. Those designs may result in disqualification from the drop/impact test during final product evaluation. A rigorous study on the impact failure of the displays is of course necessitated in order to avoid the problems. In this article, a systematic design evaluation is presented with combinations of FEM modeling and testing to support the optimal shock proof display design procedure.

POF를 이용한 Curved-Type LED 광원장치의 광효율 향상을 위한 광학적 설계

박소희 한국물리학회 2018 New Physics: Sae Mulli Vol.68 No.7

We designed a light source device that combines a plastic optical fiber (POF) with a light-emitting diode (LED) source in the form of patterns on a cladding surrounding the outer surface of a light guide plate (LGP) so that a pattern processed on the POF could emit as one pixel. In order to analyze the distribution of the power emitted from the light source inside the POF, we installed 28 detectors and performed computer simulations. Consequently, 26797.9 Lux of light was transmitted to the end through three bent paths; thus, the designed system can be used as a light source device. In addition, the Curved-type LED source device using the POF emitted more uniform light compared to the conventional inserted LEDs or LEDs arranged only along one side. In order to improve the light efficiency, we confirmed that the desired illuminance distribution could be obtained by reducing the pattern close to the light source and adjusting the amount of emitted light according to the pattern control conditions of each region. 플라스틱광섬유(plastic optical fiber, POF)에 가공된 패턴이 하나의 픽셀처럼 발광할 수 있도록 클래딩에 패턴을 가공하고 도광판 (light guide plate, LGP) 외곽을 둘러싸는 형태로 플라스틱광섬유를 LED 광원에 결합한 광원장치를 설계하였다. 플라스틱광섬유 내부에 28개의 검출기를 설치하고 광원으로부터 내부에 방출되는 출력분포를 분석하기 위해 전산모사한 결과 세 번의 구부러진 경로를 통해서도 끝 단까지 26797.9 Lux의 광량이 전달되어 광원장치로써의 가능성을 보였다. 또한 도광판을 가공하여 LED를 삽입하거나 한쪽 측면에만 배치하는 기존의 방식에 비해 훨씬 균일한 광을 제공하게 되며, 광효율을 향상시키기 위해 광원부에 가까운 패턴을 줄이고 영역별 패턴 제어 조건에 따라 출사되는 광량을 조절하면 원하는 조도(illuminance)분포를 얻을 수 있음을 확인하였다.