• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1407-1410
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• 2007

This work reports on three primary color fluorescent white organic light emitting diode (WOLED) with simple device structure where only a part of the hole transporting layer was doped with dye. The maximum luminance of the device reaches $35000\;cd/m^2$ at a drive voltage below 11V and external quantum efficiency of the device is above 1% in the wide range of luminance from 10 to $35000\;cd/m^2$ and reaches its highest 1.6% at $500\;cd/m^2$. The chromaticity coordinate shift of the device is negligible in this wide range of luminance. The blue shift of emission color with an increase of current density was attributed to the narrowing of recombination zone width with raise of current density.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1390-1393
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• 2005

We fabricated an efficient top emission organic light emitting diode (FTEOLED) on paper substrates. For water proof and surface planarization, parylene of 5mm thick has been coated on copy paper substrate by vapor polymerization. As use this coating layer, fabrication of device was possible by photolithography and wet etching. Because paper is not transparent, we adapted top emission structure with transparent cathode and reflective anode. The FTOLED on paper showed the excellent electrical characteristic, $109cd/m^2$, 2.3cd/A at 10V.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.108-112
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• 2002

A new pixel driving method for organic light-emitting diode (OLED) flat-panel display (FPD) is proposed. The new charge-pump passive-matrix pixel driver consists only of a storage capacitance and a rectifying diode, and no thin-film transistor (TFT) is needed. The new driver not only supplies a constant current to the OLED throughout the whole period of panel scanning like an active-matrix driver, but also provides a highly linear gray-scale control through a pure digital manner.

• Journal of Information Display
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• 제10권2호
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• pp.80-86
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• 2009

The variation of the electrical characteristics of thin-film transistors (TFTs) causes a non-uniform image quality problem, and the differential aging of organic light-emitting diode (OLED) devices causes an image-sticking problem. A video data correction method is proposed herein as an effective solution to the non-uniform electro-optical characteristics of the pixels in activematrix organic light-emitting diode (AMOLED) displays. The results of the simulation that was conducted show that the proposed method successfully senses the electrical characteristics of TFTs and the degradation of OLEDs and effectively compensates for them.

• 한국산학기술학회논문지
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• 제5권6호
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• pp.495-498
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• 2004

고도의 정보가 집약되고 응용되기 시작하면서 정보를 표현하고자 하는 방법에 대한 연구는 더욱 절실히 요구되고 있다. 자연색에 가까운 고품질의 색상의 화면을 제공하기 위해 디스플레이의 무게와 크기, 전력소모 등의 많은 부분에 대해 연구가 진행되고 있다. 본 논문에서는 이러한 모든 기능을 충족시켜주는 차세대 디스플레이인 OLED(Organic Light-Emitting Diode)에 대한 구동 드라이브를 디지털 회로에 응용하고자 정확한 동작에 필요한 방법에 대해 소개하고 개선점에 대한 연구를 하였다

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.799-802
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• 2005

This paper described a 2.2" $QCIF^+$ ($176{\times}RGB{\times}220$) active matrix organic light-emitting diode display (AMOLED) using low-temperature poly-silicon (LTPS) technology. We have designed the OLED pixel to match the OLED material characteristic with COG specification and optimized pixel structure to improve color gamma adjustment and simplify signal complexity.

• ETRI Journal
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• 제35권4호
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• pp.559-565
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• 2013

In this work, we develop a simulation method to predict a two-dimensional luminance distribution method using a circuitry simulation. Based on the simulation results, we successfully fabricate large area ($90mm{\times}90mm$) transparent organic light-emitting diode panels with high luminance uniformity.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.529-530
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• 2005

A voltage driving AMOLED(Active Matrix Organic Light Emitting Diode) is useful for large-sized, high resolution OLED display. The conventional 2-TFTs, 1-CAP AMOLED circuit suffer from the threshold voltage variation of TFT. In this paper, a new AMOLED structure is proposed. It is composed of 5-TFTs and 2-capacitors. It is described that the operating principle and the characteristics of the proposed structure and is verified the performance by HSPICE simulation. The result of simulation shows that the effect of the threshold voltage variation in this circuit, is able to neglect.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.522-523
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• 2005

Top emission OLED 소자에 사용되는 ITO(Indium-Tin-Oxide)의 저항을 개선하여 보다 낮은 저항을 가지는 전극을 제작하기 위해 AZO(ZnO-Ag-ZnO)를 제작하였다. AZO박막은 기존의 ITO박막이 수십 $\Omega$을 나타내던 것과 비교하여 $8\Omega$으로 매우 낮은 저항을 나타내었다. 투과율은 84%로 기존의 ITO박막과 유사한 성능을 나타내었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.485-486
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• 2006

Top emission OLED 소자에 사용되는 ITO(Indium-Tin-Oxide)의 저항을 개선하여 보다 낮은 저항을 가지는 전극을 제작하기 위해 AZO(ZnO-Ag-ZnO)를 제작하였다. AZO박막은 기존의 ITO박막이 수십 $\Omega$을 나타내던 것과 비교하여 $8{\Omega}$으로 매우 낮은 저항을 나타내었다 투과율은 84%로 기존의 ITO박막과 유사한 성능을 나타내었다.