• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.787-790
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• 2004

The large size and high brightness backlight system for LCD panel inspection equipment was designed, fabricated, and evaluated. The cold cathode fluorescent lamp (CCFL) instead of the hot cathode fluorescent lamp (HCFL) were used as the light source. The inverters for driving multi-lamp CCFL backlight systems were also designed and fabricated. The measured luminance of the fabricated CCFL backlight system was 20,000 cd/$m^2$ and the uniformity of the backlight was 85%. The fabricated backlight system was successfully applied to the LCD panel inspection equipment.

• 마이크로전자및패키징학회지
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• 제11권2호
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• pp.37-41
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• 2004

LCD TV의 백라이트로서는 cold cathode flourescent lamp (CCFL)를 병렬로 구성한 직하방식의 백라이트 많이 사용되고 있다. 현재 각 각의 CCFL에 transformer 한개 씩을 사용하여 일정한 전류를 공급함으로서 백라이트의 균일도를 얻고 있으나 본 논문에서는 differential driving inverter를 이용하여 transfomer에 8개의 램프를 연결하여 구동함으로써 transformer의 개수를 현저히 줄일 수 있었다. Differential driving 방법을 이용하여 transformer 2개를 사용한 인버터를 제작하였으며 이를 이용하여 길이 450mm, 관경 4mm의 CCFL 16개를 사용한 26"용 LCD TV 백라이트를 구동할 수 있었다. 개발된 differential driving 인버터를 이용하여 백라이트를 구동한 결과 $88\%$ 이상의 휘도 균일도를 갖는 백라이트를 구현할 수 있었다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2008년도 춘계종합학술대회 A
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• pp.713-716
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• 2008

본 논문은 모바일 디스플레이를 위한 자동 백라이트 밝기 조정 시스템을 제안한다. 모바일 디스플레이에서 가장 중요한 요소들 중의 하나가 이동시 제한된 전력 원으로 인한 전력 소모를 들 수 있다. LCD 디스플레이에서 공급 전력의 80% 이상이 LED 백라이트 (BL박에서 소비된다. 또한 디스플레이 밝기는 동영상과 고해상도 영상 적용 시 더 높아야 하기 때문에 과도한 전력이 소비될 뿐만 아니라 어두운 환경에서는 지나친 눈부심을 줄 수 있다. 이러한 경우 밝기를 자동으로 줄여주고, 소비전력 또한 줄이기 위해 본 논문은 모바일 디스플레이 분야에서 자동 밝기 조절 (ABC) 기술을 제안한다. 개발된 시스템은 내장형 광센서를 가진 패널, 광센서를 조절할 수 있는 구동 IC 및 BLU로 구성되어 있다. 패널에 내장된 광센서 어레이가 외부의 광을 자동으로 검지하기 때문에 어두운 환경에서 BLU의 소비전력은 감소된다. 개발된 ABC 시스템은 어두운 환경에서 50%의 감소된 소비전력 특성을 보였다. 이러한 시스템은 모바일 TFT-LCD의 전력을 조절하는데 상당히 유용하다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.413-416
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• 2007

Motion-estimation/motion-compensation (ME/MC) provides superior motion picture quality but its huge computation load results in high cost. Impulsive driving is a cost-effective solution but it suffers from large flicker and brightness loss. Motion compensated impulsive driving technology has been developed to achieve high motion picture quality in a cost-effective implementation by combining ME/MC and impulsive driving. The key idea is to apply ME/MC or impulsive driving selectively according to the motion vector distribution of the incoming image sequence. In this paper, the description of the algorithm and the experimental results are provided.

• Transactions on Electrical and Electronic Materials
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• 제8권4호
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• pp.178-181
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• 2007

We have designed high performance prism light-guide plate (LGP) in 17 inch TFT-LCD. In test result to embody high brightness BLU in case of LGP of base and upper surface with 17 inch, thickness 8 mm adding prism construct, it is superior brightness improvement than previous that of printing form about some 20% and in this course to embody actual material it succeeded prism LGP production by 17 inch injection form process.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.15-20
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• 2005

We have achieved 180-degree angle of view performance using Super-PVA (S-PVA) technology first time in TFT-LCD industry. 82" full high definition ($1920{\times}1080$) TFT- LCD panel, the world's largest TFT-LCD, have been developed. In addition to the size breakthrough, this product achieves 600nits brightness, over 1200:1 contrast ratio, viewing angle free, 92% color gamut, and 8ms response time. Several key enabling technologies were developed to achieve these specifications, including two transistor direct driven independently controlled S-PVA subpixels, non even area ratio sub-pixels for optimal offaxis gamma, gate overlap driving for larger driving margin, new CCFL technology for higher color gamut, and advanced fabrication techniques including the use of Samsung's new $7^{th}$ generation line.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.281-285
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• 2006

Recently LG.Philips LCD (hereafter "LPL") has announced the development of the world's largest 100-inch TFT-LCD with Advanced Super IPS technology. This magnificent LCD achieves the feature of a full high definition resolution $1920{\times}1080(16:9)$, 600nit brightness, 3000:1 dynamic contrast ratio, 92% color gamut, 180 degree viewing angle, and 5msec response time at all grays, targeted for HDTV and public display applications. Some unique technologies such as Cu bus line, advanced wide view polarizer, and high color gamut lamp were applied. A new stitching free technology was developed to overcome the size limitation of photo mask in both the TFT and CF processes. The size of the panel (100-inch) based on the wide format (16:9) is determined by the maximum efficiency of world's $1^{st}$ seventh generation line (glass size:$1950{\times}2250mm$) in LPL's Paju display cluster. In this paper, we will discuss the issues of 100-inch TFT-LCD.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.290-293
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• 2006

We designed the H-IPS that has similar aperture ratio to the AS-IPS with organic insulator. To improve the aperture ratio without organic insulator, we positioned the pixel electrode over the preceding gate on the base of the H-IPS structure, and minimized the width of pixel and common electrodes. Without the additional process, we could obtain the similar brightness with that of AS-IPS in 15inch SXGA+ Panel.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 추계학술대회
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• pp.1253-1257
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• 2004

We have developed new rear LCD Projection TV engine with 3 projection lens. It has high brightness and contrast ratio, however poor cooling conditions. If optical components close to light source, optical components are damaged on high temperature, especially the blue among RGB colors is weakest by heat In this study, a new enhanced cooling method of LCD projection TV with 3 lens is shown: the best suited design of duct and relations between LCD panel and polarizer lifetime with changed area of duct.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 하계학술대회 논문집
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• pp.294-298
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• 2000

As the LED or LCD technology has been developed, if we use LED or LCD pannel, more wide color range coluld be obtained as CRT monitor. Specially, full color LED display is developed by high brightness blue LED. It can be applicable to display pannel with a long-life, wide visible angle and high brightness. A display pannel shows the images of CRT monitor performed by the main computer. Graphic application in the main computer is therefore more important in the market. Conventional 3D STUDIO, one of graphic softwares, has difficulties in manipulating and understanding the specific terminology so that one may need more time to learn it. We, therefore, developed graphic application which can recycle the conventional 3D images by creating or editing the image easily.