삼성디스플레이의 성장요인에 관한 사례연구

허정,이상훈 경성대학교 산업개발연구소 2018 산업혁신연구 Vol.34 No.4

To identify the growth factors of LCD display industry in Korea, this study analyzed the processes for creating competitive advantage and growth patterns of Korean TFT-LCD firm. Specifically, we investigated specific development strategies and success factors according to three development stages: internal competitiveness, strategic network construction, open innovation. For this study, a single case study of TFT-LCD firm, Samsung Display, was conducted using the purposive sampling method. As a result, first, Samsung Display was able to rapidly grow by strengthening their internal competitiveness through mass investment, product standardization strategy, applied technology concentration, and commercialization strategy of new technology. Second, cooperative networks were developed by forming strategic alliance, constructing of R&D vertical relationship structure, and utilization of OEM. Lastly, Samsung Diplay have created an opportunity to have their own competitive advantage by absorbing external technology capabilities and establishing an open innovation system in LCD cluster. The growth strategy model of LCD industry in this study is expected to provide implications for making innovation policy of future display industry as well as similar other IT hardware industries. 본 연구의 목적은 우리나라 LCD 디스플레이 산업의 성장요인을 파악하기 위하여 국내 LCD기업의 경쟁우위 확보 과정과 성장 패턴을 규명하고, 이를 발전단계의 관점에 따라 내부 경쟁력 확보/ 유기적 네트워크 구축/ 개방형 혁신 3단계로 구분하여 세부 전략 및 성공 요인을 도출하는 것이다. 이를 위해 1998년부터 천안 산업단지를 조성하여 TFT-LCD(thin film transistor liquid crystal display) 패널(panel)을 제조하는 삼성디스플레이를 대상으로 유의 추출법(purposive sampling)을 활용한 단일 사례 연구를 진행하였다. 삼성디스플레이의 사례연구를 통해 다음과 같은 결과를 도출하였다. 첫째, 삼성디스플레이는 선제적 투자, 제품 표준화 전략, 응용기술 집중, 신기술의 사업화 전략 등을 통해 내부 경쟁력을 강화시키며 빠르게 성장할 수 있었다. 둘째, 유기적인 네트워크를 구축을 이뤄가며 발전시켜나갔는데 그 성장 요인으로는 기업 간 전략적 제휴, 개방성에 기반한 R&D 수직 연계 구조 정립, OEM의 활용 등을 들 수 있다. 마지막으로 삼성디스플레이는 적절한 시기에 개방형 혁신 시스템을 구축하여 외부 기술역량을 적절히 흡수함으로써 자신들의 경쟁우위를 창출할 수 있는 기회를 만들었다고 볼 수 있다. 본 연구는 빠르게 변화되는 디스플레이 산업환경 속에서 현재의 국내 기업의 경쟁력을 재검토하고 미래 경쟁력 강화를 위한 정책적 시사점을 도출할 수 있을 것으로 기대한다. 또한 본 연구를 통해 도출된 성장전략 모델과 연구 프레임워크는 향후 타 차세대 IT Hardware를 기반으로 한 유사산업의 경쟁우위 창출 방안 제시를 위한 가이드라인으로 제공될 수 있을 것으로 기대된다.

비정질 및 다결정 실리콘 TFT-LCD에서의 플리커(flicker) 현상 비교 분석 연구

손명식,송민수,유건호,장진,Son, Myung-Sik,Song, Min-Soo,Yoo, Keon-Ho,Jang, Jin 대한전자공학회 2003 電子工學會論文誌-SD (Semiconductor and devices) Vol.40 No.1

In this paper, we present results of the comparative analysis of the flicker phenomena in the poly-Si TFT-LCD and a-Si:H TFT-LCD arrays for the development and manufacturing of wide-area and high-quality TFT-LCD displays. We used four different types of TFTs; a-Si:H TFT, excimer laser annealed (ELA) poly-Si TFT, silicide mediated crystallization (SMC) poly-Si TFT, and counter-doped lateral body terminal (LBT), poly-Si TFT. We defined the electrical quantity of the flicker so that we could compare the flickers quantitatively for four different 40" UXGA TFT-LCDs. We identify three factors contributing to the flicker, such as charging time, kickback voltage and leakage current, and analyze how much each of three factors give rise to the flincker in the different TFT-LCD arrays. In addition, we suggest and show that, in the case of the poly-Si TFT-LCD arrays, the low-level (minimum) gate voltages should be carefully chosen to minimize the flicker because of their larger leakage currents compared with a-Si TFT-LCD arrays.

LCD 제조공정에서 사용되는 화학물질의 종류 및 특성

박승현,박해동,노지원 한국산업보건학회 2019 한국산업보건학회지 Vol.29 No.3

Objectives: The purpose of this study was to investigate types and characteristics of chemical substances used in LCD(Liquid crystal display) panel manufacturing process. Methods: The LCD panel manufacturing process is divided into the fabrication(fab) process and module process. The use of chemical substances by process was investigated at four fab processes and two module processes at two domestic TFT-LCD(Thin film transistor-Liquid crystal display) panel manufacturing sites. Results: LCD panels are manufactured through various unit processes such as sputtering, chemical vapor deposition(CVD), etching, and photolithography, and a range of chemicals are used in each process. Metal target materials including copper, aluminum, and indium tin oxide are used in the sputtering process, and gaseous materials such as phosphine, silane, and chlorine are used in CVD and dry etching processes. Inorganic acids such as hydrofluoric acid, nitric acid and sulfuric acid are used in wet etching process, and photoresist and developer are used in photolithography process. Chemical substances for the alignment of liquid crystal, such as polyimides, liquid crystals, and sealants are used in a liquid crystal process. Adhesives and hardeners for adhesion of driver IC and printed circuit board(PCB) to the LCD panel are used in the module process. Conclusions: LCD panels are produced through dozens of unit processes using various types of chemical substances in clean room facilities. Hazardous substances such as organic solvents, reactive gases, irritants, and toxic substances are used in the manufacturing processes, but periodic workplace monitoring applies only to certain chemical substances by law. Therefore, efforts should be made to minimize worker exposure to chemical substances used in LCD panel manufacturing process.

트리즈 기법을 활용한 삼성전자의 TFT-LCD 기술혁신 사례연구

반병섭(Ban, Byeong-Seob) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.6

TFT-LCD 패널 제조 산업에서 삼성전자는 후발기업으로써 선발기업인 일본의 샤프를 추월하여 선도하고 있다. 트리즈 시스템 분석을 활용하여 디스플레이 산업은 노트, 모니터, TV & 모바일 제품 시장으로 변화를 하였으며 시장 (고객)의 요구속성도 변화를 함을 제시하였다. 또한 삼성의 TFT-LCD 기술 중 빠른 응답 기술 혁신 사례를 제시하였다. 예를 들면, 응답속도 개선을 위해 기존 사용하고 있는 액정 혼합물에 트리즈의 모순성, 물질-장 방법 등을 활용하여 개발된 고복굴 절률 액정물질을 첨가하여 광시야 각, 빠른응답 특성을 갖는 신규 액정 혼합물을 개발하였다. 새로운 액정혼합물의 응답속도 는 60%정도로 단축 개선되었다(기존 액정 사용 시 16 ms, 새로운 액정혼합물 사용 시 10ms). In the TFT-LCD(Thin Film Transistor-Liquid Crystal Display) panel manufacturing industry, SAMSUNG, a late entry, can catch up to leading first mover, SHARP. The changes the note, monitor, TV, and mobile markets in the TFT-LCD industry were studied using a system analysis method. In addition , the fast response time technology in SAMSUNG TFT-LCD technology was developed using the TRIZ method. For example, a new liquid crystal mixture of a wide view angle and fast response time were developed by doping a new high birefringence liquid crystal material in a base mixture using the contradiction method and su-field method of TRIZ. The response time of a new liquid crystal mixture was improved to approximately 60%(16.2ms with base LC mixture, 9.8ms with a new LC mixture).

TFT LCD 세정 방법에 대한 프로세스 개선에 관한 연구

홍민성,김종민,강신재 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

As next generation display, TFT LCD gets into the spotlight, and the bigger glass size is required. Currently, its display size is 1500 mm by 1870 mm at the six generation comparing with 300 mm by 400 mm at the first one and the size is increasing continuously, which cause the difficulties to apply the cleaning operation including the general brush cleaning. In this study, water-jet cleaning operation has been introduced, which spent the less water them other cleaning methods. Throughout the experiment, is has been found the possible damage of the declined cell and the variation of the tilt bias angle depending upon the increasing time. In addition, the simulation predicts the glass bending of the display.

High Speed Response Time of Nematic Liquid Crystal Mixtures for LCD Monitor and TV Applications

Kim, Y.B.,Hur, I.K. The Korean Infomation Display Society 2001 Journal of information display Vol.2 No.3

The most important parameter for TV application of LCD is a fast switching time for the display of moving image. To achieve faster switching time, the novel LC single materials with large dielectric anisotropies ($16{\sim}20$), high clearing temperatures ($195.5{\sim}237.4^{\circ}C$), broad nematic ranges (up to 169.9 $^{\circ}C$) and high birefringence ($0.254{\sim}0.2200$) were developed. KUR-series LC mixtures blended these single materials having significantly higher clearing temperatures and dielectric anisotropy values compared with conventional LC mixture. Especially, their clearing temperatures are $10{\sim}30^{\circ}C$ higher than their host mixture. These LC mixtures showing about lOms of high-speed switching time in Tv/Monitor of TFT LCD, is short enough to be addressed in a single time frame of 60Hz (16.7 ms). The threshold voltage $V_{th}$ was low enough to operate at a driving voltage of 5 V. The VHR values were found to be high enough for TFT-LCD in wide temperature range. Our novel LC mixtures are suitable materials for the inclusion in to LC mixtures for TV application of TN-LCD

임베디드 환경을 이용한 TFT-LCD 3D 모듈 검사 시스템

김효남(Hyo-Nam Kim),박진양(Jin-Yang Park) 한국컴퓨터정보학회 2013 한국컴퓨터정보학회 학술발표논문집 Vol.21 No.1

3D LCD Module은 기존 TFT-LCD에 Parallax Barrier 방식과 Passive Glasses 방식 및 Active Glass 방식의 기술을 적합하여 만들어 진다. 현재는 3D Module 제작 후 기타 ASSY 장치를 부착 하여 시제품 출시 전에 3D 패턴을 기반으로 출하 검사를 통해 제품 이상 유무를 검사하다 보니 제품 출하 검사 시 불량 요인으로 불량 제품에 대한 모든 Repair공정을 위해 많은 시간 및 인력, 자재 등의 많은 로스 부분이 발생 하여 생산성 절감 및 제품 원가 상승의 요인이 발생 한다. 따라서 본 논문에서 제안하고자 하는 내용은 기존의 2D TFT-LCD Module 검사장비에 3D Pattern 및 동영상을 구현하여 보다 신속 하고 정확한 임베디드 환경을 이용한 2D 및 3D LCD Module용 검사 시스템을 개발 하는데 있다.

Display guidance for automotive visual interface display’s pixel density

Jinyoung Lee(이진영),Donggyun Yoo(유동균),Hojun Lee(이호준),Hyunseok Kim(김현석) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6

With the growth of autonomous driving, connectivity and electrification system technologies for future mobility, automotive industry highly requires high-tech displays, because unlike in the past, where conventional display provided indicators like vehicle speed, state of vehicle, navigation and audio information, it has been added with powerful entertainment systems such as movie, and video call. [1] Therefore, it is a key factor for display to deliver clear message and information through HMI(Human-Machine-Interface) during driving environment. To this end, although size, brightness, and power consumption are important, the most crucial factor to determine quality of display is high resolution. However, it remains a big challenge for automotive world to find a reasonable and attractive display because cost efficiency cannot be disregarded. [2], [3], [4] To find the optimized display, we studied the effect of pixel density on the image quality of indicators displayed on automotive screens. The automotive screen what we used for this experiment was an instrument panel directly delivering information to customer. Fig. 1-(a) is one of the examples. Evaluate the quality of screen compared with display resolution, we selected specific images such as text messages, tell-tales, navigation, and speed meter. Explanation of images is represented as below. The formula for calculating the perceived size of an object was used to find the best resolution compared to the size of display and the results are Fig. 1-(b) and 1-(c). compared with pixel density, the Fig. 1-(b) shows the perception of image distortion and jagged edges and the Fig. 1-(c) describes the quality level of various HMI.

모바일 TFT-LCD 생산라인에서 휘도 테스트를 위한 소형 광학측정기 개발

안성수(Sung-Su Ahn),권기진(Ki-Jjn Kwon) 한국정보기술학회 2012 한국정보기술학회논문지 Vol.10 No.7

In this paper, a compact-sized optical measurement system, applicable in mobile TFT-LCD production lines is presented for luminance testing of LCD modules. Our system consists of a color sensor board employing the 3-channel RGB color sensor and a main control board basing on the ARM CPU. Using nonlinear regression method, it is calibrated in reference to the YOKOGAWA display tester, which is widely used for the display performance measurements. It can be operated independently or controlled by a PC for measuring the luminance of LCD modules. The optical measurement system developed through the luminance test proved its performance with an average error within 5% which leads to the possibility of the system being employed for the luminance testing in mobile TFT-LCD production lines.

최신형 스마트폰 디스플레이 색재현 성능향상에 관한 비교연구AMOLED 및 TFT-LCD를 중심으로

김현서 ( Hyun Suh Kim ),신수근 ( Soo Keun Shin ),이용환 ( Yong Hwan Lee ) 한국사진학회 2014 AURA Vol.0 No.32

This paper carries out an evaluation of the quality of preferred colors in digital photography reproduced on the display of smart phones. In order to inquire into the display that has established itself as a major media of the reproduction of digital photographs, this study compares the color reproduction ability of two smart phones equipped with the latest display technologies such as AM-OLED and TFT-LCD and evaluates their colors and image quality. The methods of research include: 1) an analysis of the results of preceding research through the process of an objective evaluation of colors; and 2) addition of details of an analysis of the enhanced display of the newest smart phones and suggestion of a few supplement points. It is safe to say that the scale of delivery of various visual arts through smart phones has recently exceeded that through the analogue methods. According to this flow, an objective evaluation of digital colors and a study on standards have become necessary subjects of research, regarding the way in which a picture taken is digitally reproduced on a display. This paper recorded a comparative analysis of the trend of colors reproduced through smart phones in the processes of producing and generating digital images. The displays are calculated from the range of the performance included within display gamut volume from six categories of database that are luminance, white balance, gray scale linearity, RGB channel, color reproduction and contrast.