• Proceedings of the International Microelectronics And Packaging Society Conference
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• 2001.07a
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• pp.51-62
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• 2001

• Proceedings of the International Microelectronics And Packaging Society Conference
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• 2001.11a
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• pp.200-204
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• 2001

The high efficiency and high power inverter for driving LCD backlight was designed and fabricated. The operating frequency was variable and dimming capability was also included. High dimming ratio could be achieved by PWM dimming. The optimum driving condition for LCD backlight could be obtained by using the excited type inverter.

• The monthly packaging world
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• s.176
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• pp.83-87
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• 2007

• Journal of Information Display
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• v.10 no.2
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• pp.49-53
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• 2009

In this study, a very small LED packaging lead frame with a low thermal resistance was developed. The cost of the package process was reduced by the use of many small LED lamps, which increased the light emission efficiency. Compared to the large lead frame lamp, however, the optical property of the small LED packaging lead frame lamp was not sufficiently improved because its reflection structure was changed and its reflection area was reduced. The luminous efficiency of the LED lamp reaches 58 lm/W at the current density of 0.16 A/$cm^2$. Using the LED lamps, 46-inch LCD BLU was manufactured. The BLU-made LED lamps have a low power consumption of 146 W and have a slim (10-mm-thick) BLU, keeping good uniformity in terms of brightness, and maintaining good thermal properties.

• Journal of the Microelectronics and Packaging Society
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• v.14 no.2 s.43
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• pp.1-8
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• 2007

A flat fluorescent lamp (FFL) was developed as a light source for LCD TV Backlight. The channels of FFL were realized by forming the flat glass at high temperature. The performance of the backlight with FFL was shown to improve by optimizing the FFL channel profile that has elliptical shape, 4.4 mm height and 1.4 mm sealing distance. In this paper, the brightness uniformity of LCD TV backlights was investigated by optical simulation of FFL channel profiles. The brightness of LCD TV using FFL with the optimized channel profile was shown to be $576\;cd/m^2$.

• Journal of the Microelectronics and Packaging Society
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• v.11 no.2 s.31
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• pp.37-41
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• 2004

Parallel combination of cold chathode fluorescent lamps (CCFL) are widely used as the light sources of LCD TV backlight. Brightness uniformity is safisfied by using one transformer per one CCFL. Instead of using one transformer per oneCCFL, one transformer is used to drive 8 CCFLs by using differential driving method. A differential driving inverter with two transformers is developed to drive 16 CCFLs of 26' backlight for LCD TV. The brightness uniformity of $88\%$ was obtained by driving 26' backlight with the developed differential driving inverter successfully.

• The monthly packaging world
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• s.172
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• pp.61-65
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• 2007

디스플레이용 PET필름 시장이 활황을 띌 것으로 보인다. 디스플레이용 PET필름은 확산.보호.반사 필름, 프리즘시트 등 LCD 광학필름의 원재료 격으로 국내 시장(세계약 40% 추정)은 LCD TV 등의 확산에 힘입어 올해 약 32% 정도의 고성장이 예상되고 있다. 그동안 포장재.비디오테이프∙전자부품 등 범용 PET필름 생산에 주력했던 SKC.코오롱.도레이새한 등 주요 화학.섬유 업체들이 LCD광학필름 제조에 필요한 디스플레이용 PET 필름의 생산 인프라를 확대하거나 새롭게 구축하기 시작한 것이다. 특히 그동안 기존 범용 PET 필름 생산라인의 일부를 이용해 생산했던 방식에서 탈피해 디스플레이 전용 라인을 신설, 향후 지속적인 수요확대에 대응한다는 전략을 구체화하고 있어 주목된다. 본 고에서는 (사)한국포장협회 회원사를 대상으로 조사한 내용을 바탕으로 업체별 PET 및 Nylon 시장을 살펴보도록 하겠다.

• The monthly packaging world
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• s.154
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• pp.108-109
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• 2006

PVA필름은 휴대폰, 카메라폰, 컴퓨터모니터, LCD TV등 편광필름이 사용되는 TFT-LCD 제품에는 반드시 필요한 핵심부품으로, 최근 인조대리석 제조용 필름, 분리필름, 내(耐)산소투과성 포장필름 등에도 활용범위를 넓혀가고 있는 신소재이다. 그러나 PVA필름은 일본이 PVA특성조절기술을 갖고 있어 그동안 일본에서 전량 수입해 사용해 온 것이 현실. 지난 1990년 설립된 이래, 국내 최초로 순수국내 기술로 고온수용성 부직포를 개발하며, 생산해 온 (주)텍스테크(대표이사 신재균)가 폐 부직포를 재활용해 LCD용 폴리비닐알코올(PVA) 필름을 제조하는 기술을 개발, 업계의 주목을 끌고 있다. 신재균 사장을 만나 폐부직포를 이용한 PVA 필름제조 기술개발 경위와 기대효과를 들어보았다.

• Journal of Institute of Control, Robotics and Systems
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• v.16 no.2
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• pp.172-176
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• 2010

Recently, LCD (Liquid Crystal Display) requires various technical challenges; high definition, high quality, big size, and low price. These demands more pixels in the fixed area of the LCD and very fine lead pitch of the driving IC which controls the pixels. Therefore, a new packaging technology is needed to meet such technical requirement. NCP (Non Conductive Paste) is one of the new packaging methods and has excellent characteristics to overcome the problems of the ACF (Anisotropic Conductive Film). In this paper, we analyzed the process of the NCP for COF (Chip on FPCB) and proposed the key design parameters of the NCP process. Through a series of experiments, we obtained the stable values of the design parameters for successful NCP process.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.71-71
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• 2009

Recently several LCD TV makers including Samsung, LG and Sony actively have released LED LCD TV models on market. LED LCD TV is just which applied LED BLUs so that its color contrast ratio fairly enhance up to 1 million:1 and its thickness minimize to a few mm. Even this aspect seems somewhat to be each panel maker's strategies for prior market occupations on whole TV market. Without regard to the reasons, we do obviously meet a new era of technically advanced LCD TV. However we have still lots of problems or issues which we must overcome technically including LED chip/packaging process, secondary optics treatment, heat managements and cost reduction issues. Here I would like to forecast market volume and trend of LED LCD TV first and then discuss above almost of technical issues and suggest their possible solutions. Even these solutions looks better technologies and if they may increase production cost significantly, we will not prefer to choice that technology since lower cost policy can open the market. Finally I'm trying to suggest how well LED, as future light source, can apply to future LCD TV technologies.